commit 62ea8ab3e34e9ba2dc3853fa30c14a273401f716
Author: uvos <devnull@uvos.xyz>
Date:   Sun Feb 11 15:17:07 2024 +0100

    inial commit

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..c93a3a8
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.23)
+
+project(aimusictagger LANGUAGES C CXX)
+
+set (CMAKE_CXX_STANDARD 20)
+
+find_package(Llama REQUIRED)
+find_package(tagparser REQUIRED)
+
+
+set(SRC_FILES
+	main.cpp
+	utils.cpp
+	bar.cpp
+	llmai.cpp
+	tag.cpp
+)
+
+add_executable(${PROJECT_NAME} ${SRC_FILES})
+target_compile_definitions(${PROJECT_NAME} PUBLIC NETWORK_DIR="${CMAKE_CURRENT_SOURCE_DIR}/net" PROG_NAME="${PROJECT_NAME}")
+target_link_libraries(${PROJECT_NAME} ${llama_LIBRARY} ${TAG_PARSER_LIB})
+target_include_directories(${PROJECT_NAME} PUBLIC ${LLAMA_INCLUDE_DIRS} ${TAG_PARSER_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR})
+install(TARGETS ${PROJECT_NAME} DESTINATION bin)
diff --git a/argparse.h b/argparse.h
new file mode 100644
index 0000000..c614b5e
--- /dev/null
+++ b/argparse.h
@@ -0,0 +1,2183 @@
+/*
+  __ _ _ __ __ _ _ __   __ _ _ __ ___  ___
+ / _` | '__/ _` | '_ \ / _` | '__/ __|/ _ \ Argument Parser for Modern C++
+| (_| | | | (_| | |_) | (_| | |  \__ \  __/ http://github.com/p-ranav/argparse
+ \__,_|_|  \__, | .__/ \__,_|_|  |___/\___|
+           |___/|_|
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2019-2022 Pranav Srinivas Kumar <pranav.srinivas.kumar@gmail.com>
+and other contributors.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#pragma once
+
+#ifndef ARGPARSE_MODULE_USE_STD_MODULE
+#include <algorithm>
+#include <any>
+#include <array>
+#include <cerrno>
+#include <charconv>
+#include <cstdlib>
+#include <functional>
+#include <iomanip>
+#include <iostream>
+#include <iterator>
+#include <limits>
+#include <list>
+#include <map>
+#include <numeric>
+#include <optional>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <string_view>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+#include <variant>
+#include <vector>
+#endif
+
+namespace argparse {
+
+namespace details { // namespace for helper methods
+
+template <typename T, typename = void>
+struct HasContainerTraits : std::false_type {};
+
+template <> struct HasContainerTraits<std::string> : std::false_type {};
+
+template <> struct HasContainerTraits<std::string_view> : std::false_type {};
+
+template <typename T>
+struct HasContainerTraits<
+    T, std::void_t<typename T::value_type, decltype(std::declval<T>().begin()),
+                   decltype(std::declval<T>().end()),
+                   decltype(std::declval<T>().size())>> : std::true_type {};
+
+template <typename T>
+inline constexpr bool IsContainer = HasContainerTraits<T>::value;
+
+template <typename T, typename = void>
+struct HasStreamableTraits : std::false_type {};
+
+template <typename T>
+struct HasStreamableTraits<
+    T,
+    std::void_t<decltype(std::declval<std::ostream &>() << std::declval<T>())>>
+    : std::true_type {};
+
+template <typename T>
+inline constexpr bool IsStreamable = HasStreamableTraits<T>::value;
+
+constexpr std::size_t repr_max_container_size = 5;
+
+template <typename T> std::string repr(T const &val) {
+  if constexpr (std::is_same_v<T, bool>) {
+    return val ? "true" : "false";
+  } else if constexpr (std::is_convertible_v<T, std::string_view>) {
+    return '"' + std::string{std::string_view{val}} + '"';
+  } else if constexpr (IsContainer<T>) {
+    std::stringstream out;
+    out << "{";
+    const auto size = val.size();
+    if (size > 1) {
+      out << repr(*val.begin());
+      std::for_each(
+          std::next(val.begin()),
+          std::next(
+              val.begin(),
+              static_cast<typename T::iterator::difference_type>(
+                  std::min<std::size_t>(size, repr_max_container_size) - 1)),
+          [&out](const auto &v) { out << " " << repr(v); });
+      if (size <= repr_max_container_size) {
+        out << " ";
+      } else {
+        out << "...";
+      }
+    }
+    if (size > 0) {
+      out << repr(*std::prev(val.end()));
+    }
+    out << "}";
+    return out.str();
+  } else if constexpr (IsStreamable<T>) {
+    std::stringstream out;
+    out << val;
+    return out.str();
+  } else {
+    return "<not representable>";
+  }
+}
+
+namespace {
+
+template <typename T> constexpr bool standard_signed_integer = false;
+template <> constexpr bool standard_signed_integer<signed char> = true;
+template <> constexpr bool standard_signed_integer<short int> = true;
+template <> constexpr bool standard_signed_integer<int> = true;
+template <> constexpr bool standard_signed_integer<long int> = true;
+template <> constexpr bool standard_signed_integer<long long int> = true;
+
+template <typename T> constexpr bool standard_unsigned_integer = false;
+template <> constexpr bool standard_unsigned_integer<unsigned char> = true;
+template <> constexpr bool standard_unsigned_integer<unsigned short int> = true;
+template <> constexpr bool standard_unsigned_integer<unsigned int> = true;
+template <> constexpr bool standard_unsigned_integer<unsigned long int> = true;
+template <>
+constexpr bool standard_unsigned_integer<unsigned long long int> = true;
+
+} // namespace
+
+constexpr int radix_2 = 2;
+constexpr int radix_8 = 8;
+constexpr int radix_10 = 10;
+constexpr int radix_16 = 16;
+
+template <typename T>
+constexpr bool standard_integer =
+    standard_signed_integer<T> || standard_unsigned_integer<T>;
+
+template <class F, class Tuple, class Extra, std::size_t... I>
+constexpr decltype(auto)
+apply_plus_one_impl(F &&f, Tuple &&t, Extra &&x,
+                    std::index_sequence<I...> /*unused*/) {
+  return std::invoke(std::forward<F>(f), std::get<I>(std::forward<Tuple>(t))...,
+                     std::forward<Extra>(x));
+}
+
+template <class F, class Tuple, class Extra>
+constexpr decltype(auto) apply_plus_one(F &&f, Tuple &&t, Extra &&x) {
+  return details::apply_plus_one_impl(
+      std::forward<F>(f), std::forward<Tuple>(t), std::forward<Extra>(x),
+      std::make_index_sequence<
+          std::tuple_size_v<std::remove_reference_t<Tuple>>>{});
+}
+
+constexpr auto pointer_range(std::string_view s) noexcept {
+  return std::tuple(s.data(), s.data() + s.size());
+}
+
+template <class CharT, class Traits>
+constexpr bool starts_with(std::basic_string_view<CharT, Traits> prefix,
+                           std::basic_string_view<CharT, Traits> s) noexcept {
+  return s.substr(0, prefix.size()) == prefix;
+}
+
+enum class chars_format {
+  scientific = 0xf1,
+  fixed = 0xf2,
+  hex = 0xf4,
+  binary = 0xf8,
+  general = fixed | scientific
+};
+
+struct ConsumeBinaryPrefixResult {
+  bool is_binary;
+  std::string_view rest;
+};
+
+constexpr auto consume_binary_prefix(std::string_view s)
+    -> ConsumeBinaryPrefixResult {
+  if (starts_with(std::string_view{"0b"}, s) ||
+      starts_with(std::string_view{"0B"}, s)) {
+    s.remove_prefix(2);
+    return {true, s};
+  }
+  return {false, s};
+}
+
+struct ConsumeHexPrefixResult {
+  bool is_hexadecimal;
+  std::string_view rest;
+};
+
+using namespace std::literals;
+
+constexpr auto consume_hex_prefix(std::string_view s)
+    -> ConsumeHexPrefixResult {
+  if (starts_with("0x"sv, s) || starts_with("0X"sv, s)) {
+    s.remove_prefix(2);
+    return {true, s};
+  }
+  return {false, s};
+}
+
+template <class T, auto Param>
+inline auto do_from_chars(std::string_view s) -> T {
+  T x;
+  auto [first, last] = pointer_range(s);
+  auto [ptr, ec] = std::from_chars(first, last, x, Param);
+  if (ec == std::errc()) {
+    if (ptr == last) {
+      return x;
+    }
+    throw std::invalid_argument{"pattern '" + std::string(s) +
+                                "' does not match to the end"};
+  }
+  if (ec == std::errc::invalid_argument) {
+    throw std::invalid_argument{"pattern '" + std::string(s) + "' not found"};
+  }
+  if (ec == std::errc::result_out_of_range) {
+    throw std::range_error{"'" + std::string(s) + "' not representable"};
+  }
+  return x; // unreachable
+}
+
+template <class T, auto Param = 0> struct parse_number {
+  auto operator()(std::string_view s) -> T {
+    return do_from_chars<T, Param>(s);
+  }
+};
+
+template <class T> struct parse_number<T, radix_2> {
+  auto operator()(std::string_view s) -> T {
+    if (auto [ok, rest] = consume_binary_prefix(s); ok) {
+      return do_from_chars<T, radix_2>(rest);
+    }
+    throw std::invalid_argument{"pattern not found"};
+  }
+};
+
+template <class T> struct parse_number<T, radix_16> {
+  auto operator()(std::string_view s) -> T {
+    if (starts_with("0x"sv, s) || starts_with("0X"sv, s)) {
+      if (auto [ok, rest] = consume_hex_prefix(s); ok) {
+        try {
+          return do_from_chars<T, radix_16>(rest);
+        } catch (const std::invalid_argument &err) {
+          throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                      "' as hexadecimal: " + err.what());
+        } catch (const std::range_error &err) {
+          throw std::range_error("Failed to parse '" + std::string(s) +
+                                 "' as hexadecimal: " + err.what());
+        }
+      }
+    } else {
+      // Allow passing hex numbers without prefix
+      // Shape 'x' already has to be specified
+      try {
+        return do_from_chars<T, radix_16>(s);
+      } catch (const std::invalid_argument &err) {
+        throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                    "' as hexadecimal: " + err.what());
+      } catch (const std::range_error &err) {
+        throw std::range_error("Failed to parse '" + std::string(s) +
+                               "' as hexadecimal: " + err.what());
+      }
+    }
+
+    throw std::invalid_argument{"pattern '" + std::string(s) +
+                                "' not identified as hexadecimal"};
+  }
+};
+
+template <class T> struct parse_number<T> {
+  auto operator()(std::string_view s) -> T {
+    auto [ok, rest] = consume_hex_prefix(s);
+    if (ok) {
+      try {
+        return do_from_chars<T, radix_16>(rest);
+      } catch (const std::invalid_argument &err) {
+        throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                    "' as hexadecimal: " + err.what());
+      } catch (const std::range_error &err) {
+        throw std::range_error("Failed to parse '" + std::string(s) +
+                               "' as hexadecimal: " + err.what());
+      }
+    }
+
+    auto [ok_binary, rest_binary] = consume_binary_prefix(s);
+    if (ok_binary) {
+      try {
+        return do_from_chars<T, radix_2>(rest_binary);
+      } catch (const std::invalid_argument &err) {
+        throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                    "' as binary: " + err.what());
+      } catch (const std::range_error &err) {
+        throw std::range_error("Failed to parse '" + std::string(s) +
+                               "' as binary: " + err.what());
+      }
+    }
+
+    if (starts_with("0"sv, s)) {
+      try {
+        return do_from_chars<T, radix_8>(rest);
+      } catch (const std::invalid_argument &err) {
+        throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                    "' as octal: " + err.what());
+      } catch (const std::range_error &err) {
+        throw std::range_error("Failed to parse '" + std::string(s) +
+                               "' as octal: " + err.what());
+      }
+    }
+
+    try {
+      return do_from_chars<T, radix_10>(rest);
+    } catch (const std::invalid_argument &err) {
+      throw std::invalid_argument("Failed to parse '" + std::string(s) +
+                                  "' as decimal integer: " + err.what());
+    } catch (const std::range_error &err) {
+      throw std::range_error("Failed to parse '" + std::string(s) +
+                             "' as decimal integer: " + err.what());
+    }
+  }
+};
+
+namespace {
+
+template <class T> inline const auto generic_strtod = nullptr;
+template <> inline const auto generic_strtod<float> = strtof;
+template <> inline const auto generic_strtod<double> = strtod;
+template <> inline const auto generic_strtod<long double> = strtold;
+
+} // namespace
+
+template <class T> inline auto do_strtod(std::string const &s) -> T {
+  if (isspace(static_cast<unsigned char>(s[0])) || s[0] == '+') {
+    throw std::invalid_argument{"pattern '" + s + "' not found"};
+  }
+
+  auto [first, last] = pointer_range(s);
+  char *ptr;
+
+  errno = 0;
+  auto x = generic_strtod<T>(first, &ptr);
+  if (errno == 0) {
+    if (ptr == last) {
+      return x;
+    }
+    throw std::invalid_argument{"pattern '" + s +
+                                "' does not match to the end"};
+  }
+  if (errno == ERANGE) {
+    throw std::range_error{"'" + s + "' not representable"};
+  }
+  return x; // unreachable
+}
+
+template <class T> struct parse_number<T, chars_format::general> {
+  auto operator()(std::string const &s) -> T {
+    if (auto r = consume_hex_prefix(s); r.is_hexadecimal) {
+      throw std::invalid_argument{
+          "chars_format::general does not parse hexfloat"};
+    }
+    if (auto r = consume_binary_prefix(s); r.is_binary) {
+      throw std::invalid_argument{
+          "chars_format::general does not parse binfloat"};
+    }
+
+    try {
+      return do_strtod<T>(s);
+    } catch (const std::invalid_argument &err) {
+      throw std::invalid_argument("Failed to parse '" + s +
+                                  "' as number: " + err.what());
+    } catch (const std::range_error &err) {
+      throw std::range_error("Failed to parse '" + s +
+                             "' as number: " + err.what());
+    }
+  }
+};
+
+template <class T> struct parse_number<T, chars_format::hex> {
+  auto operator()(std::string const &s) -> T {
+    if (auto r = consume_hex_prefix(s); !r.is_hexadecimal) {
+      throw std::invalid_argument{"chars_format::hex parses hexfloat"};
+    }
+    if (auto r = consume_binary_prefix(s); r.is_binary) {
+      throw std::invalid_argument{"chars_format::hex does not parse binfloat"};
+    }
+
+    try {
+      return do_strtod<T>(s);
+    } catch (const std::invalid_argument &err) {
+      throw std::invalid_argument("Failed to parse '" + s +
+                                  "' as hexadecimal: " + err.what());
+    } catch (const std::range_error &err) {
+      throw std::range_error("Failed to parse '" + s +
+                             "' as hexadecimal: " + err.what());
+    }
+  }
+};
+
+template <class T> struct parse_number<T, chars_format::binary> {
+  auto operator()(std::string const &s) -> T {
+    if (auto r = consume_hex_prefix(s); r.is_hexadecimal) {
+      throw std::invalid_argument{
+          "chars_format::binary does not parse hexfloat"};
+    }
+    if (auto r = consume_binary_prefix(s); !r.is_binary) {
+      throw std::invalid_argument{"chars_format::binary parses binfloat"};
+    }
+
+    return do_strtod<T>(s);
+  }
+};
+
+template <class T> struct parse_number<T, chars_format::scientific> {
+  auto operator()(std::string const &s) -> T {
+    if (auto r = consume_hex_prefix(s); r.is_hexadecimal) {
+      throw std::invalid_argument{
+          "chars_format::scientific does not parse hexfloat"};
+    }
+    if (auto r = consume_binary_prefix(s); r.is_binary) {
+      throw std::invalid_argument{
+          "chars_format::scientific does not parse binfloat"};
+    }
+    if (s.find_first_of("eE") == std::string::npos) {
+      throw std::invalid_argument{
+          "chars_format::scientific requires exponent part"};
+    }
+
+    try {
+      return do_strtod<T>(s);
+    } catch (const std::invalid_argument &err) {
+      throw std::invalid_argument("Failed to parse '" + s +
+                                  "' as scientific notation: " + err.what());
+    } catch (const std::range_error &err) {
+      throw std::range_error("Failed to parse '" + s +
+                             "' as scientific notation: " + err.what());
+    }
+  }
+};
+
+template <class T> struct parse_number<T, chars_format::fixed> {
+  auto operator()(std::string const &s) -> T {
+    if (auto r = consume_hex_prefix(s); r.is_hexadecimal) {
+      throw std::invalid_argument{
+          "chars_format::fixed does not parse hexfloat"};
+    }
+    if (auto r = consume_binary_prefix(s); r.is_binary) {
+      throw std::invalid_argument{
+          "chars_format::fixed does not parse binfloat"};
+    }
+    if (s.find_first_of("eE") != std::string::npos) {
+      throw std::invalid_argument{
+          "chars_format::fixed does not parse exponent part"};
+    }
+
+    try {
+      return do_strtod<T>(s);
+    } catch (const std::invalid_argument &err) {
+      throw std::invalid_argument("Failed to parse '" + s +
+                                  "' as fixed notation: " + err.what());
+    } catch (const std::range_error &err) {
+      throw std::range_error("Failed to parse '" + s +
+                             "' as fixed notation: " + err.what());
+    }
+  }
+};
+
+template <typename StrIt>
+std::string join(StrIt first, StrIt last, const std::string &separator) {
+  if (first == last) {
+    return "";
+  }
+  std::stringstream value;
+  value << *first;
+  ++first;
+  while (first != last) {
+    value << separator << *first;
+    ++first;
+  }
+  return value.str();
+}
+
+template <typename T> struct can_invoke_to_string {
+  template <typename U>
+  static auto test(int)
+      -> decltype(std::to_string(std::declval<U>()), std::true_type{});
+
+  template <typename U> static auto test(...) -> std::false_type;
+
+  static constexpr bool value = decltype(test<T>(0))::value;
+};
+
+template <typename T> struct IsChoiceTypeSupported {
+  using CleanType = typename std::decay<T>::type;
+  static const bool value = std::is_integral<CleanType>::value ||
+                            std::is_same<CleanType, std::string>::value ||
+                            std::is_same<CleanType, std::string_view>::value ||
+                            std::is_same<CleanType, const char *>::value;
+};
+
+template <typename StringType>
+std::size_t get_levenshtein_distance(const StringType &s1,
+                                     const StringType &s2) {
+  std::vector<std::vector<std::size_t>> dp(
+      s1.size() + 1, std::vector<std::size_t>(s2.size() + 1, 0));
+
+  for (std::size_t i = 0; i <= s1.size(); ++i) {
+    for (std::size_t j = 0; j <= s2.size(); ++j) {
+      if (i == 0) {
+        dp[i][j] = j;
+      } else if (j == 0) {
+        dp[i][j] = i;
+      } else if (s1[i - 1] == s2[j - 1]) {
+        dp[i][j] = dp[i - 1][j - 1];
+      } else {
+        dp[i][j] = 1 + std::min({dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]});
+      }
+    }
+  }
+
+  return dp[s1.size()][s2.size()];
+}
+
+template <typename ValueType>
+std::string_view
+get_most_similar_string(const std::map<std::string_view, ValueType> &map,
+                        const std::string_view input) {
+  std::string_view most_similar{};
+  std::size_t min_distance = std::numeric_limits<std::size_t>::max();
+
+  for (const auto &entry : map) {
+    std::size_t distance = get_levenshtein_distance(entry.first, input);
+    if (distance < min_distance) {
+      min_distance = distance;
+      most_similar = entry.first;
+    }
+  }
+
+  return most_similar;
+}
+
+} // namespace details
+
+enum class nargs_pattern { optional, any, at_least_one };
+
+enum class default_arguments : unsigned int {
+  none = 0,
+  help = 1,
+  version = 2,
+  all = help | version,
+};
+
+inline default_arguments operator&(const default_arguments &a,
+                                   const default_arguments &b) {
+  return static_cast<default_arguments>(
+      static_cast<std::underlying_type<default_arguments>::type>(a) &
+      static_cast<std::underlying_type<default_arguments>::type>(b));
+}
+
+class ArgumentParser;
+
+class Argument {
+  friend class ArgumentParser;
+  friend auto operator<<(std::ostream &stream, const ArgumentParser &parser)
+      -> std::ostream &;
+
+  template <std::size_t N, std::size_t... I>
+  explicit Argument(std::string_view prefix_chars,
+                    std::array<std::string_view, N> &&a,
+                    std::index_sequence<I...> /*unused*/)
+      : m_accepts_optional_like_value(false),
+        m_is_optional((is_optional(a[I], prefix_chars) || ...)),
+        m_is_required(false), m_is_repeatable(false), m_is_used(false),
+        m_prefix_chars(prefix_chars) {
+    ((void)m_names.emplace_back(a[I]), ...);
+    std::sort(
+        m_names.begin(), m_names.end(), [](const auto &lhs, const auto &rhs) {
+          return lhs.size() == rhs.size() ? lhs < rhs : lhs.size() < rhs.size();
+        });
+  }
+
+public:
+  template <std::size_t N>
+  explicit Argument(std::string_view prefix_chars,
+                    std::array<std::string_view, N> &&a)
+      : Argument(prefix_chars, std::move(a), std::make_index_sequence<N>{}) {}
+
+  Argument &help(std::string help_text) {
+    m_help = std::move(help_text);
+    return *this;
+  }
+
+  Argument &metavar(std::string metavar) {
+    m_metavar = std::move(metavar);
+    return *this;
+  }
+
+  template <typename T> Argument &default_value(T &&value) {
+    m_num_args_range = NArgsRange{0, m_num_args_range.get_max()};
+    m_default_value_repr = details::repr(value);
+
+    if constexpr (std::is_convertible_v<T, std::string_view>) {
+      m_default_value_str = std::string{std::string_view{value}};
+    } else if constexpr (details::can_invoke_to_string<T>::value) {
+      m_default_value_str = std::to_string(value);
+    }
+
+    m_default_value = std::forward<T>(value);
+    return *this;
+  }
+
+  Argument &default_value(const char *value) {
+    return default_value(std::string(value));
+  }
+
+  Argument &required() {
+    m_is_required = true;
+    return *this;
+  }
+
+  Argument &implicit_value(std::any value) {
+    m_implicit_value = std::move(value);
+    m_num_args_range = NArgsRange{0, 0};
+    return *this;
+  }
+
+  // This is shorthand for:
+  //   program.add_argument("foo")
+  //     .default_value(false)
+  //     .implicit_value(true)
+  Argument &flag() {
+    default_value(false);
+    implicit_value(true);
+    return *this;
+  }
+
+  template <class F, class... Args>
+  auto action(F &&callable, Args &&... bound_args)
+      -> std::enable_if_t<std::is_invocable_v<F, Args..., std::string const>,
+                          Argument &> {
+    using action_type = std::conditional_t<
+        std::is_void_v<std::invoke_result_t<F, Args..., std::string const>>,
+        void_action, valued_action>;
+    if constexpr (sizeof...(Args) == 0) {
+      m_action.emplace<action_type>(std::forward<F>(callable));
+    } else {
+      m_action.emplace<action_type>(
+          [f = std::forward<F>(callable),
+           tup = std::make_tuple(std::forward<Args>(bound_args)...)](
+              std::string const &opt) mutable {
+            return details::apply_plus_one(f, tup, opt);
+          });
+    }
+    return *this;
+  }
+
+  auto &append() {
+    m_is_repeatable = true;
+    return *this;
+  }
+
+  template <char Shape, typename T>
+  auto scan() -> std::enable_if_t<std::is_arithmetic_v<T>, Argument &> {
+    static_assert(!(std::is_const_v<T> || std::is_volatile_v<T>),
+                  "T should not be cv-qualified");
+    auto is_one_of = [](char c, auto... x) constexpr {
+      return ((c == x) || ...);
+    };
+
+    if constexpr (is_one_of(Shape, 'd') && details::standard_integer<T>) {
+      action(details::parse_number<T, details::radix_10>());
+    } else if constexpr (is_one_of(Shape, 'i') &&
+                         details::standard_integer<T>) {
+      action(details::parse_number<T>());
+    } else if constexpr (is_one_of(Shape, 'u') &&
+                         details::standard_unsigned_integer<T>) {
+      action(details::parse_number<T, details::radix_10>());
+    } else if constexpr (is_one_of(Shape, 'b') &&
+                         details::standard_unsigned_integer<T>) {
+      action(details::parse_number<T, details::radix_2>());
+    } else if constexpr (is_one_of(Shape, 'o') &&
+                         details::standard_unsigned_integer<T>) {
+      action(details::parse_number<T, details::radix_8>());
+    } else if constexpr (is_one_of(Shape, 'x', 'X') &&
+                         details::standard_unsigned_integer<T>) {
+      action(details::parse_number<T, details::radix_16>());
+    } else if constexpr (is_one_of(Shape, 'a', 'A') &&
+                         std::is_floating_point_v<T>) {
+      action(details::parse_number<T, details::chars_format::hex>());
+    } else if constexpr (is_one_of(Shape, 'e', 'E') &&
+                         std::is_floating_point_v<T>) {
+      action(details::parse_number<T, details::chars_format::scientific>());
+    } else if constexpr (is_one_of(Shape, 'f', 'F') &&
+                         std::is_floating_point_v<T>) {
+      action(details::parse_number<T, details::chars_format::fixed>());
+    } else if constexpr (is_one_of(Shape, 'g', 'G') &&
+                         std::is_floating_point_v<T>) {
+      action(details::parse_number<T, details::chars_format::general>());
+    } else {
+      static_assert(alignof(T) == 0, "No scan specification for T");
+    }
+
+    return *this;
+  }
+
+  Argument &nargs(std::size_t num_args) {
+    m_num_args_range = NArgsRange{num_args, num_args};
+    return *this;
+  }
+
+  Argument &nargs(std::size_t num_args_min, std::size_t num_args_max) {
+    m_num_args_range = NArgsRange{num_args_min, num_args_max};
+    return *this;
+  }
+
+  Argument &nargs(nargs_pattern pattern) {
+    switch (pattern) {
+    case nargs_pattern::optional:
+      m_num_args_range = NArgsRange{0, 1};
+      break;
+    case nargs_pattern::any:
+      m_num_args_range =
+          NArgsRange{0, (std::numeric_limits<std::size_t>::max)()};
+      break;
+    case nargs_pattern::at_least_one:
+      m_num_args_range =
+          NArgsRange{1, (std::numeric_limits<std::size_t>::max)()};
+      break;
+    }
+    return *this;
+  }
+
+  Argument &remaining() {
+    m_accepts_optional_like_value = true;
+    return nargs(nargs_pattern::any);
+  }
+
+  template <typename T> void add_choice(T &&choice) {
+    static_assert(details::IsChoiceTypeSupported<T>::value,
+                  "Only string or integer type supported for choice");
+    static_assert(std::is_convertible_v<T, std::string_view> ||
+                      details::can_invoke_to_string<T>::value,
+                  "Choice is not convertible to string_type");
+    if (!m_choices.has_value()) {
+      m_choices = std::vector<std::string>{};
+    }
+
+    if constexpr (std::is_convertible_v<T, std::string_view>) {
+      m_choices.value().push_back(
+          std::string{std::string_view{std::forward<T>(choice)}});
+    } else if constexpr (details::can_invoke_to_string<T>::value) {
+      m_choices.value().push_back(std::to_string(std::forward<T>(choice)));
+    }
+  }
+
+  Argument &choices() {
+    if (!m_choices.has_value()) {
+      throw std::runtime_error("Zero choices provided");
+    }
+    return *this;
+  }
+
+  template <typename T, typename... U>
+  Argument &choices(T &&first, U &&... rest) {
+    add_choice(std::forward<T>(first));
+    choices(std::forward<U>(rest)...);
+    return *this;
+  }
+
+  void find_default_value_in_choices_or_throw() const {
+
+    const auto &choices = m_choices.value();
+
+    if (m_default_value.has_value()) {
+      if (std::find(choices.begin(), choices.end(), m_default_value_str) ==
+          choices.end()) {
+        // provided arg not in list of allowed choices
+        // report error
+
+        std::string choices_as_csv =
+            std::accumulate(choices.begin(), choices.end(), std::string(),
+                            [](const std::string &a, const std::string &b) {
+                              return a + (a.empty() ? "" : ", ") + b;
+                            });
+
+        throw std::runtime_error(
+            std::string{"Invalid default value "} + m_default_value_repr +
+            " - allowed options: {" + choices_as_csv + "}");
+      }
+    }
+  }
+
+  template <typename Iterator>
+  void find_value_in_choices_or_throw(Iterator it) const {
+
+    const auto &choices = m_choices.value();
+
+    if (std::find(choices.begin(), choices.end(), *it) == choices.end()) {
+      // provided arg not in list of allowed choices
+      // report error
+
+      std::string choices_as_csv =
+          std::accumulate(choices.begin(), choices.end(), std::string(),
+                          [](const std::string &a, const std::string &b) {
+                            return a + (a.empty() ? "" : ", ") + b;
+                          });
+
+      throw std::runtime_error(std::string{"Invalid argument "} +
+                               details::repr(*it) + " - allowed options: {" +
+                               choices_as_csv + "}");
+    }
+  }
+
+  template <typename Iterator>
+  Iterator consume(Iterator start, Iterator end,
+                   std::string_view used_name = {}) {
+    if (!m_is_repeatable && m_is_used) {
+      throw std::runtime_error("Duplicate argument");
+    }
+    m_is_used = true;
+    m_used_name = used_name;
+
+    if (m_choices.has_value()) {
+      // Check each value in (start, end) and make sure
+      // it is in the list of allowed choices/options
+      std::size_t i = 0;
+      auto max_number_of_args = m_num_args_range.get_max();
+      for (auto it = start; it != end; ++it) {
+        if (i == max_number_of_args) {
+          break;
+        }
+        find_value_in_choices_or_throw(it);
+        i += 1;
+      }
+    }
+
+    const auto num_args_max = m_num_args_range.get_max();
+    const auto num_args_min = m_num_args_range.get_min();
+    std::size_t dist = 0;
+    if (num_args_max == 0) {
+      m_values.emplace_back(m_implicit_value);
+      std::visit([](const auto &f) { f({}); }, m_action);
+      return start;
+    }
+    if ((dist = static_cast<std::size_t>(std::distance(start, end))) >=
+        num_args_min) {
+      if (num_args_max < dist) {
+        end = std::next(start, static_cast<typename Iterator::difference_type>(
+                                   num_args_max));
+      }
+      if (!m_accepts_optional_like_value) {
+        end = std::find_if(
+            start, end,
+            std::bind(is_optional, std::placeholders::_1, m_prefix_chars));
+        dist = static_cast<std::size_t>(std::distance(start, end));
+        if (dist < num_args_min) {
+          throw std::runtime_error("Too few arguments");
+        }
+      }
+
+      struct ActionApply {
+        void operator()(valued_action &f) {
+          std::transform(first, last, std::back_inserter(self.m_values), f);
+        }
+
+        void operator()(void_action &f) {
+          std::for_each(first, last, f);
+          if (!self.m_default_value.has_value()) {
+            if (!self.m_accepts_optional_like_value) {
+              self.m_values.resize(
+                  static_cast<std::size_t>(std::distance(first, last)));
+            }
+          }
+        }
+
+        Iterator first, last;
+        Argument &self;
+      };
+      std::visit(ActionApply{start, end, *this}, m_action);
+      return end;
+    }
+    if (m_default_value.has_value()) {
+      return start;
+    }
+    throw std::runtime_error("Too few arguments for '" +
+                             std::string(m_used_name) + "'.");
+  }
+
+  /*
+   * @throws std::runtime_error if argument values are not valid
+   */
+  void validate() const {
+    if (m_is_optional) {
+      // TODO: check if an implicit value was programmed for this argument
+      if (!m_is_used && !m_default_value.has_value() && m_is_required) {
+        throw_required_arg_not_used_error();
+      }
+      if (m_is_used && m_is_required && m_values.empty()) {
+        throw_required_arg_no_value_provided_error();
+      }
+    } else {
+      if (!m_num_args_range.contains(m_values.size()) &&
+          !m_default_value.has_value()) {
+        throw_nargs_range_validation_error();
+      }
+    }
+
+    if (m_choices.has_value()) {
+      // Make sure the default value (if provided)
+      // is in the list of choices
+      find_default_value_in_choices_or_throw();
+    }
+  }
+
+  std::string get_names_csv(char separator = ',') const {
+    return std::accumulate(
+        m_names.begin(), m_names.end(), std::string{""},
+        [&](const std::string &result, const std::string &name) {
+          return result.empty() ? name : result + separator + name;
+        });
+  }
+
+  std::string get_usage_full() const {
+    std::stringstream usage;
+
+    usage << get_names_csv('/');
+    const std::string metavar = !m_metavar.empty() ? m_metavar : "VAR";
+    if (m_num_args_range.get_max() > 0) {
+      usage << " " << metavar;
+      if (m_num_args_range.get_max() > 1) {
+        usage << "...";
+      }
+    }
+    return usage.str();
+  }
+
+  std::string get_inline_usage() const {
+    std::stringstream usage;
+    // Find the longest variant to show in the usage string
+    std::string longest_name = m_names.front();
+    for (const auto &s : m_names) {
+      if (s.size() > longest_name.size()) {
+        longest_name = s;
+      }
+    }
+    if (!m_is_required) {
+      usage << "[";
+    }
+    usage << longest_name;
+    const std::string metavar = !m_metavar.empty() ? m_metavar : "VAR";
+    if (m_num_args_range.get_max() > 0) {
+      usage << " " << metavar;
+      if (m_num_args_range.get_max() > 1) {
+        usage << "...";
+      }
+    }
+    if (!m_is_required) {
+      usage << "]";
+    }
+    return usage.str();
+  }
+
+  std::size_t get_arguments_length() const {
+
+    std::size_t names_size = std::accumulate(
+        std::begin(m_names), std::end(m_names), std::size_t(0),
+        [](const auto &sum, const auto &s) { return sum + s.size(); });
+
+    if (is_positional(m_names.front(), m_prefix_chars)) {
+      // A set metavar means this replaces the names
+      if (!m_metavar.empty()) {
+        // Indent and metavar
+        return 2 + m_metavar.size();
+      }
+
+      // Indent and space-separated
+      return 2 + names_size + (m_names.size() - 1);
+    }
+    // Is an option - include both names _and_ metavar
+    // size = text + (", " between names)
+    std::size_t size = names_size + 2 * (m_names.size() - 1);
+    if (!m_metavar.empty() && m_num_args_range == NArgsRange{1, 1}) {
+      size += m_metavar.size() + 1;
+    }
+    return size + 2; // indent
+  }
+
+  friend std::ostream &operator<<(std::ostream &stream,
+                                  const Argument &argument) {
+    std::stringstream name_stream;
+    name_stream << "  "; // indent
+    if (argument.is_positional(argument.m_names.front(),
+                               argument.m_prefix_chars)) {
+      if (!argument.m_metavar.empty()) {
+        name_stream << argument.m_metavar;
+      } else {
+        name_stream << details::join(argument.m_names.begin(),
+                                     argument.m_names.end(), " ");
+      }
+    } else {
+      name_stream << details::join(argument.m_names.begin(),
+                                   argument.m_names.end(), ", ");
+      // If we have a metavar, and one narg - print the metavar
+      if (!argument.m_metavar.empty() &&
+          argument.m_num_args_range == NArgsRange{1, 1}) {
+        name_stream << " " << argument.m_metavar;
+      }
+    }
+
+    // align multiline help message
+    auto stream_width = stream.width();
+    auto name_padding = std::string(name_stream.str().size(), ' ');
+    auto pos = std::string::size_type{};
+    auto prev = std::string::size_type{};
+    auto first_line = true;
+    auto hspace = "  "; // minimal space between name and help message
+    stream << name_stream.str();
+    std::string_view help_view(argument.m_help);
+    while ((pos = argument.m_help.find('\n', prev)) != std::string::npos) {
+      auto line = help_view.substr(prev, pos - prev + 1);
+      if (first_line) {
+        stream << hspace << line;
+        first_line = false;
+      } else {
+        stream.width(stream_width);
+        stream << name_padding << hspace << line;
+      }
+      prev += pos - prev + 1;
+    }
+    if (first_line) {
+      stream << hspace << argument.m_help;
+    } else {
+      auto leftover = help_view.substr(prev, argument.m_help.size() - prev);
+      if (!leftover.empty()) {
+        stream.width(stream_width);
+        stream << name_padding << hspace << leftover;
+      }
+    }
+
+    // print nargs spec
+    if (!argument.m_help.empty()) {
+      stream << " ";
+    }
+    stream << argument.m_num_args_range;
+
+    if (argument.m_default_value.has_value() &&
+        argument.m_num_args_range != NArgsRange{0, 0}) {
+      stream << "[default: " << argument.m_default_value_repr << "]";
+    } else if (argument.m_is_required) {
+      stream << "[required]";
+    }
+    stream << "\n";
+    return stream;
+  }
+
+  template <typename T> bool operator!=(const T &rhs) const {
+    return !(*this == rhs);
+  }
+
+  /*
+   * Compare to an argument value of known type
+   * @throws std::logic_error in case of incompatible types
+   */
+  template <typename T> bool operator==(const T &rhs) const {
+    if constexpr (!details::IsContainer<T>) {
+      return get<T>() == rhs;
+    } else {
+      using ValueType = typename T::value_type;
+      auto lhs = get<T>();
+      return std::equal(std::begin(lhs), std::end(lhs), std::begin(rhs),
+                        std::end(rhs), [](const auto &a, const auto &b) {
+                          return std::any_cast<const ValueType &>(a) == b;
+                        });
+    }
+  }
+
+private:
+  class NArgsRange {
+    std::size_t m_min;
+    std::size_t m_max;
+
+  public:
+    NArgsRange(std::size_t minimum, std::size_t maximum)
+        : m_min(minimum), m_max(maximum) {
+      if (minimum > maximum) {
+        throw std::logic_error("Range of number of arguments is invalid");
+      }
+    }
+
+    bool contains(std::size_t value) const {
+      return value >= m_min && value <= m_max;
+    }
+
+    bool is_exact() const { return m_min == m_max; }
+
+    bool is_right_bounded() const {
+      return m_max < (std::numeric_limits<std::size_t>::max)();
+    }
+
+    std::size_t get_min() const { return m_min; }
+
+    std::size_t get_max() const { return m_max; }
+
+    // Print help message
+    friend auto operator<<(std::ostream &stream, const NArgsRange &range)
+        -> std::ostream & {
+      if (range.m_min == range.m_max) {
+        if (range.m_min != 0 && range.m_min != 1) {
+          stream << "[nargs: " << range.m_min << "] ";
+        }
+      } else {
+        if (range.m_max == (std::numeric_limits<std::size_t>::max)()) {
+          stream << "[nargs: " << range.m_min << " or more] ";
+        } else {
+          stream << "[nargs=" << range.m_min << ".." << range.m_max << "] ";
+        }
+      }
+      return stream;
+    }
+
+    bool operator==(const NArgsRange &rhs) const {
+      return rhs.m_min == m_min && rhs.m_max == m_max;
+    }
+
+    bool operator!=(const NArgsRange &rhs) const { return !(*this == rhs); }
+  };
+
+  void throw_nargs_range_validation_error() const {
+    std::stringstream stream;
+    if (!m_used_name.empty()) {
+      stream << m_used_name << ": ";
+    } else {
+      stream << m_names.front() << ": ";
+    }
+    if (m_num_args_range.is_exact()) {
+      stream << m_num_args_range.get_min();
+    } else if (m_num_args_range.is_right_bounded()) {
+      stream << m_num_args_range.get_min() << " to "
+             << m_num_args_range.get_max();
+    } else {
+      stream << m_num_args_range.get_min() << " or more";
+    }
+    stream << " argument(s) expected. " << m_values.size() << " provided.";
+    throw std::runtime_error(stream.str());
+  }
+
+  void throw_required_arg_not_used_error() const {
+    std::stringstream stream;
+    stream << m_names.front() << ": required.";
+    throw std::runtime_error(stream.str());
+  }
+
+  void throw_required_arg_no_value_provided_error() const {
+    std::stringstream stream;
+    stream << m_used_name << ": no value provided.";
+    throw std::runtime_error(stream.str());
+  }
+
+  static constexpr int eof = std::char_traits<char>::eof();
+
+  static auto lookahead(std::string_view s) -> int {
+    if (s.empty()) {
+      return eof;
+    }
+    return static_cast<int>(static_cast<unsigned char>(s[0]));
+  }
+
+  /*
+   * decimal-literal:
+   *    '0'
+   *    nonzero-digit digit-sequence_opt
+   *    integer-part fractional-part
+   *    fractional-part
+   *    integer-part '.' exponent-part_opt
+   *    integer-part exponent-part
+   *
+   * integer-part:
+   *    digit-sequence
+   *
+   * fractional-part:
+   *    '.' post-decimal-point
+   *
+   * post-decimal-point:
+   *    digit-sequence exponent-part_opt
+   *
+   * exponent-part:
+   *    'e' post-e
+   *    'E' post-e
+   *
+   * post-e:
+   *    sign_opt digit-sequence
+   *
+   * sign: one of
+   *    '+' '-'
+   */
+  static bool is_decimal_literal(std::string_view s) {
+    auto is_digit = [](auto c) constexpr {
+      switch (c) {
+      case '0':
+      case '1':
+      case '2':
+      case '3':
+      case '4':
+      case '5':
+      case '6':
+      case '7':
+      case '8':
+      case '9':
+        return true;
+      default:
+        return false;
+      }
+    };
+
+    // precondition: we have consumed or will consume at least one digit
+    auto consume_digits = [=](std::string_view sd) {
+      // NOLINTNEXTLINE(readability-qualified-auto)
+      auto it = std::find_if_not(std::begin(sd), std::end(sd), is_digit);
+      return sd.substr(static_cast<std::size_t>(it - std::begin(sd)));
+    };
+
+    switch (lookahead(s)) {
+    case '0': {
+      s.remove_prefix(1);
+      if (s.empty()) {
+        return true;
+      }
+      goto integer_part;
+    }
+    case '1':
+    case '2':
+    case '3':
+    case '4':
+    case '5':
+    case '6':
+    case '7':
+    case '8':
+    case '9': {
+      s = consume_digits(s);
+      if (s.empty()) {
+        return true;
+      }
+      goto integer_part_consumed;
+    }
+    case '.': {
+      s.remove_prefix(1);
+      goto post_decimal_point;
+    }
+    default:
+      return false;
+    }
+
+  integer_part:
+    s = consume_digits(s);
+  integer_part_consumed:
+    switch (lookahead(s)) {
+    case '.': {
+      s.remove_prefix(1);
+      if (is_digit(lookahead(s))) {
+        goto post_decimal_point;
+      } else {
+        goto exponent_part_opt;
+      }
+    }
+    case 'e':
+    case 'E': {
+      s.remove_prefix(1);
+      goto post_e;
+    }
+    default:
+      return false;
+    }
+
+  post_decimal_point:
+    if (is_digit(lookahead(s))) {
+      s = consume_digits(s);
+      goto exponent_part_opt;
+    }
+    return false;
+
+  exponent_part_opt:
+    switch (lookahead(s)) {
+    case eof:
+      return true;
+    case 'e':
+    case 'E': {
+      s.remove_prefix(1);
+      goto post_e;
+    }
+    default:
+      return false;
+    }
+
+  post_e:
+    switch (lookahead(s)) {
+    case '-':
+    case '+':
+      s.remove_prefix(1);
+    }
+    if (is_digit(lookahead(s))) {
+      s = consume_digits(s);
+      return s.empty();
+    }
+    return false;
+  }
+
+  static bool is_optional(std::string_view name,
+                          std::string_view prefix_chars) {
+    return !is_positional(name, prefix_chars);
+  }
+
+  /*
+   * positional:
+   *    _empty_
+   *    '-'
+   *    '-' decimal-literal
+   *    !'-' anything
+   */
+  static bool is_positional(std::string_view name,
+                            std::string_view prefix_chars) {
+    auto first = lookahead(name);
+
+    if (first == eof) {
+      return true;
+    } else if (prefix_chars.find(static_cast<char>(first)) !=
+               std::string_view::npos) {
+      name.remove_prefix(1);
+      if (name.empty()) {
+        return true;
+      }
+      return is_decimal_literal(name);
+    }
+    return true;
+  }
+
+  /*
+   * Get argument value given a type
+   * @throws std::logic_error in case of incompatible types
+   */
+  template <typename T> T get() const {
+    if (!m_values.empty()) {
+      if constexpr (details::IsContainer<T>) {
+        return any_cast_container<T>(m_values);
+      } else {
+        return std::any_cast<T>(m_values.front());
+      }
+    }
+    if (m_default_value.has_value()) {
+      return std::any_cast<T>(m_default_value);
+    }
+    if constexpr (details::IsContainer<T>) {
+      if (!m_accepts_optional_like_value) {
+        return any_cast_container<T>(m_values);
+      }
+    }
+
+    throw std::logic_error("No value provided for '" + m_names.back() + "'.");
+  }
+
+  /*
+   * Get argument value given a type.
+   * @pre The object has no default value.
+   * @returns The stored value if any, std::nullopt otherwise.
+   */
+  template <typename T> auto present() const -> std::optional<T> {
+    if (m_default_value.has_value()) {
+      throw std::logic_error("Argument with default value always presents");
+    }
+    if (m_values.empty()) {
+      return std::nullopt;
+    }
+    if constexpr (details::IsContainer<T>) {
+      return any_cast_container<T>(m_values);
+    }
+    return std::any_cast<T>(m_values.front());
+  }
+
+  template <typename T>
+  static auto any_cast_container(const std::vector<std::any> &operand) -> T {
+    using ValueType = typename T::value_type;
+
+    T result;
+    std::transform(
+        std::begin(operand), std::end(operand), std::back_inserter(result),
+        [](const auto &value) { return std::any_cast<ValueType>(value); });
+    return result;
+  }
+
+  std::vector<std::string> m_names;
+  std::string_view m_used_name;
+  std::string m_help;
+  std::string m_metavar;
+  std::any m_default_value;
+  std::string m_default_value_repr;
+  std::optional<std::string>
+      m_default_value_str; // used for checking default_value against choices
+  std::any m_implicit_value;
+  std::optional<std::vector<std::string>> m_choices{std::nullopt};
+  using valued_action = std::function<std::any(const std::string &)>;
+  using void_action = std::function<void(const std::string &)>;
+  std::variant<valued_action, void_action> m_action{
+      std::in_place_type<valued_action>,
+      [](const std::string &value) { return value; }};
+  std::vector<std::any> m_values;
+  NArgsRange m_num_args_range{1, 1};
+  // Bit field of bool values. Set default value in ctor.
+  bool m_accepts_optional_like_value : 1;
+  bool m_is_optional : 1;
+  bool m_is_required : 1;
+  bool m_is_repeatable : 1;
+  bool m_is_used : 1;
+  std::string_view m_prefix_chars; // ArgumentParser has the prefix_chars
+};
+
+class ArgumentParser {
+public:
+  explicit ArgumentParser(std::string program_name = {},
+                          std::string version = "1.0",
+                          default_arguments add_args = default_arguments::all,
+                          bool exit_on_default_arguments = true,
+                          std::ostream &os = std::cout)
+      : m_program_name(std::move(program_name)), m_version(std::move(version)),
+        m_exit_on_default_arguments(exit_on_default_arguments),
+        m_parser_path(m_program_name) {
+    if ((add_args & default_arguments::help) == default_arguments::help) {
+      add_argument("-h", "--help")
+          .action([&](const auto & /*unused*/) {
+            os << help().str();
+            if (m_exit_on_default_arguments) {
+              std::exit(0);
+            }
+          })
+          .default_value(false)
+          .help("shows help message and exits")
+          .implicit_value(true)
+          .nargs(0);
+    }
+    if ((add_args & default_arguments::version) == default_arguments::version) {
+      add_argument("-v", "--version")
+          .action([&](const auto & /*unused*/) {
+            os << m_version << std::endl;
+            if (m_exit_on_default_arguments) {
+              std::exit(0);
+            }
+          })
+          .default_value(false)
+          .help("prints version information and exits")
+          .implicit_value(true)
+          .nargs(0);
+    }
+  }
+
+  ~ArgumentParser() = default;
+
+  // ArgumentParser is meant to be used in a single function.
+  // Setup everything and parse arguments in one place.
+  //
+  // ArgumentParser internally uses std::string_views,
+  // references, iterators, etc.
+  // Many of these elements become invalidated after a copy or move.
+  ArgumentParser(const ArgumentParser &other) = delete;
+  ArgumentParser &operator=(const ArgumentParser &other) = delete;
+  ArgumentParser(ArgumentParser &&) noexcept = delete;
+  ArgumentParser &operator=(ArgumentParser &&) = delete;
+
+  explicit operator bool() const {
+    auto arg_used = std::any_of(m_argument_map.cbegin(), m_argument_map.cend(),
+                                [](auto &it) { return it.second->m_is_used; });
+    auto subparser_used =
+        std::any_of(m_subparser_used.cbegin(), m_subparser_used.cend(),
+                    [](auto &it) { return it.second; });
+
+    return m_is_parsed && (arg_used || subparser_used);
+  }
+
+  // Parameter packing
+  // Call add_argument with variadic number of string arguments
+  template <typename... Targs> Argument &add_argument(Targs... f_args) {
+    using array_of_sv = std::array<std::string_view, sizeof...(Targs)>;
+    auto argument =
+        m_optional_arguments.emplace(std::cend(m_optional_arguments),
+                                     m_prefix_chars, array_of_sv{f_args...});
+
+    if (!argument->m_is_optional) {
+      m_positional_arguments.splice(std::cend(m_positional_arguments),
+                                    m_optional_arguments, argument);
+    }
+
+    index_argument(argument);
+    return *argument;
+  }
+
+  class MutuallyExclusiveGroup {
+    friend class ArgumentParser;
+
+  public:
+    MutuallyExclusiveGroup() = delete;
+
+    explicit MutuallyExclusiveGroup(ArgumentParser &parent,
+                                    bool required = false)
+        : m_parent(parent), m_required(required), m_elements({}) {}
+
+    MutuallyExclusiveGroup(const MutuallyExclusiveGroup &other) = delete;
+    MutuallyExclusiveGroup &
+    operator=(const MutuallyExclusiveGroup &other) = delete;
+
+    MutuallyExclusiveGroup(MutuallyExclusiveGroup &&other) noexcept
+        : m_parent(other.m_parent), m_required(other.m_required),
+          m_elements(std::move(other.m_elements)) {
+      other.m_elements.clear();
+    }
+
+    template <typename... Targs> Argument &add_argument(Targs... f_args) {
+      auto &argument = m_parent.add_argument(std::forward<Targs>(f_args)...);
+      m_elements.push_back(&argument);
+      return argument;
+    }
+
+  private:
+    ArgumentParser &m_parent;
+    bool m_required{false};
+    std::vector<Argument *> m_elements{};
+  };
+
+  MutuallyExclusiveGroup &add_mutually_exclusive_group(bool required = false) {
+    m_mutually_exclusive_groups.emplace_back(*this, required);
+    return m_mutually_exclusive_groups.back();
+  }
+
+  // Parameter packed add_parents method
+  // Accepts a variadic number of ArgumentParser objects
+  template <typename... Targs>
+  ArgumentParser &add_parents(const Targs &... f_args) {
+    for (const ArgumentParser &parent_parser : {std::ref(f_args)...}) {
+      for (const auto &argument : parent_parser.m_positional_arguments) {
+        auto it = m_positional_arguments.insert(
+            std::cend(m_positional_arguments), argument);
+        index_argument(it);
+      }
+      for (const auto &argument : parent_parser.m_optional_arguments) {
+        auto it = m_optional_arguments.insert(std::cend(m_optional_arguments),
+                                              argument);
+        index_argument(it);
+      }
+    }
+    return *this;
+  }
+
+  ArgumentParser &add_description(std::string description) {
+    m_description = std::move(description);
+    return *this;
+  }
+
+  ArgumentParser &add_epilog(std::string epilog) {
+    m_epilog = std::move(epilog);
+    return *this;
+  }
+
+  /* Getter for arguments and subparsers.
+   * @throws std::logic_error in case of an invalid argument or subparser name
+   */
+  template <typename T = Argument> T &at(std::string_view name) {
+    if constexpr (std::is_same_v<T, Argument>) {
+      return (*this)[name];
+    } else {
+      auto subparser_it = m_subparser_map.find(name);
+      if (subparser_it != m_subparser_map.end()) {
+        return subparser_it->second->get();
+      }
+      throw std::logic_error("No such subparser: " + std::string(name));
+    }
+  }
+
+  ArgumentParser &set_prefix_chars(std::string prefix_chars) {
+    m_prefix_chars = std::move(prefix_chars);
+    return *this;
+  }
+
+  ArgumentParser &set_assign_chars(std::string assign_chars) {
+    m_assign_chars = std::move(assign_chars);
+    return *this;
+  }
+
+  /* Call parse_args_internal - which does all the work
+   * Then, validate the parsed arguments
+   * This variant is used mainly for testing
+   * @throws std::runtime_error in case of any invalid argument
+   */
+  void parse_args(const std::vector<std::string> &arguments) {
+    parse_args_internal(arguments);
+    // Check if all arguments are parsed
+    for ([[maybe_unused]] const auto &[unused, argument] : m_argument_map) {
+      argument->validate();
+    }
+
+    // Check each mutually exclusive group and make sure
+    // there are no constraint violations
+    for (const auto &group : m_mutually_exclusive_groups) {
+      auto mutex_argument_used{false};
+      Argument *mutex_argument_it{nullptr};
+      for (Argument *arg : group.m_elements) {
+        if (!mutex_argument_used && arg->m_is_used) {
+          mutex_argument_used = true;
+          mutex_argument_it = arg;
+        } else if (mutex_argument_used && arg->m_is_used) {
+          // Violation
+          throw std::runtime_error("Argument '" + arg->get_usage_full() +
+                                   "' not allowed with '" +
+                                   mutex_argument_it->get_usage_full() + "'");
+        }
+      }
+
+      if (!mutex_argument_used && group.m_required) {
+        // at least one argument from the group is
+        // required
+        std::string argument_names{};
+        std::size_t i = 0;
+        std::size_t size = group.m_elements.size();
+        for (Argument *arg : group.m_elements) {
+          if (i + 1 == size) {
+            // last
+            argument_names += "'" + arg->get_usage_full() + "' ";
+          } else {
+            argument_names += "'" + arg->get_usage_full() + "' or ";
+          }
+          i += 1;
+        }
+        throw std::runtime_error("One of the arguments " + argument_names +
+                                 "is required");
+      }
+    }
+  }
+
+  /* Call parse_known_args_internal - which does all the work
+   * Then, validate the parsed arguments
+   * This variant is used mainly for testing
+   * @throws std::runtime_error in case of any invalid argument
+   */
+  std::vector<std::string>
+  parse_known_args(const std::vector<std::string> &arguments) {
+    auto unknown_arguments = parse_known_args_internal(arguments);
+    // Check if all arguments are parsed
+    for ([[maybe_unused]] const auto &[unused, argument] : m_argument_map) {
+      argument->validate();
+    }
+    return unknown_arguments;
+  }
+
+  /* Main entry point for parsing command-line arguments using this
+   * ArgumentParser
+   * @throws std::runtime_error in case of any invalid argument
+   */
+  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
+  void parse_args(int argc, const char *const argv[]) {
+    parse_args({argv, argv + argc});
+  }
+
+  /* Main entry point for parsing command-line arguments using this
+   * ArgumentParser
+   * @throws std::runtime_error in case of any invalid argument
+   */
+  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays)
+  auto parse_known_args(int argc, const char *const argv[]) {
+    return parse_known_args({argv, argv + argc});
+  }
+
+  /* Getter for options with default values.
+   * @throws std::logic_error if parse_args() has not been previously called
+   * @throws std::logic_error if there is no such option
+   * @throws std::logic_error if the option has no value
+   * @throws std::bad_any_cast if the option is not of type T
+   */
+  template <typename T = std::string> T get(std::string_view arg_name) const {
+    if (!m_is_parsed) {
+      throw std::logic_error("Nothing parsed, no arguments are available.");
+    }
+    return (*this)[arg_name].get<T>();
+  }
+
+  /* Getter for options without default values.
+   * @pre The option has no default value.
+   * @throws std::logic_error if there is no such option
+   * @throws std::bad_any_cast if the option is not of type T
+   */
+  template <typename T = std::string>
+  auto present(std::string_view arg_name) const -> std::optional<T> {
+    return (*this)[arg_name].present<T>();
+  }
+
+  /* Getter that returns true for user-supplied options. Returns false if not
+   * user-supplied, even with a default value.
+   */
+  auto is_used(std::string_view arg_name) const {
+    return (*this)[arg_name].m_is_used;
+  }
+
+  /* Getter that returns true if a subcommand is used.
+   */
+  auto is_subcommand_used(std::string_view subcommand_name) const {
+    return m_subparser_used.at(subcommand_name);
+  }
+
+  /* Getter that returns true if a subcommand is used.
+   */
+  auto is_subcommand_used(const ArgumentParser &subparser) const {
+    return is_subcommand_used(subparser.m_program_name);
+  }
+
+  /* Indexing operator. Return a reference to an Argument object
+   * Used in conjunction with Argument.operator== e.g., parser["foo"] == true
+   * @throws std::logic_error in case of an invalid argument name
+   */
+  Argument &operator[](std::string_view arg_name) const {
+    auto it = m_argument_map.find(arg_name);
+    if (it != m_argument_map.end()) {
+      return *(it->second);
+    }
+    if (!is_valid_prefix_char(arg_name.front())) {
+      std::string name(arg_name);
+      const auto legal_prefix_char = get_any_valid_prefix_char();
+      const auto prefix = std::string(1, legal_prefix_char);
+
+      // "-" + arg_name
+      name = prefix + name;
+      it = m_argument_map.find(name);
+      if (it != m_argument_map.end()) {
+        return *(it->second);
+      }
+      // "--" + arg_name
+      name = prefix + name;
+      it = m_argument_map.find(name);
+      if (it != m_argument_map.end()) {
+        return *(it->second);
+      }
+    }
+    throw std::logic_error("No such argument: " + std::string(arg_name));
+  }
+
+  // Print help message
+  friend auto operator<<(std::ostream &stream, const ArgumentParser &parser)
+      -> std::ostream & {
+    stream.setf(std::ios_base::left);
+
+    auto longest_arg_length = parser.get_length_of_longest_argument();
+
+    stream << parser.usage() << "\n\n";
+
+    if (!parser.m_description.empty()) {
+      stream << parser.m_description << "\n\n";
+    }
+
+    if (!parser.m_positional_arguments.empty()) {
+      stream << "Positional arguments:\n";
+    }
+
+    for (const auto &argument : parser.m_positional_arguments) {
+      stream.width(static_cast<std::streamsize>(longest_arg_length));
+      stream << argument;
+    }
+
+    if (!parser.m_optional_arguments.empty()) {
+      stream << (parser.m_positional_arguments.empty() ? "" : "\n")
+             << "Optional arguments:\n";
+    }
+
+    for (const auto &argument : parser.m_optional_arguments) {
+      stream.width(static_cast<std::streamsize>(longest_arg_length));
+      stream << argument;
+    }
+
+    bool has_visible_subcommands = std::any_of(
+        parser.m_subparser_map.begin(), parser.m_subparser_map.end(),
+        [](auto &p) { return !p.second->get().m_suppress; });
+
+    if (has_visible_subcommands) {
+      stream << (parser.m_positional_arguments.empty()
+                     ? (parser.m_optional_arguments.empty() ? "" : "\n")
+                     : "\n")
+             << "Subcommands:\n";
+      for (const auto &[command, subparser] : parser.m_subparser_map) {
+        if (subparser->get().m_suppress) {
+          continue;
+        }
+
+        stream << std::setw(2) << " ";
+        stream << std::setw(static_cast<int>(longest_arg_length - 2))
+               << command;
+        stream << " " << subparser->get().m_description << "\n";
+      }
+    }
+
+    if (!parser.m_epilog.empty()) {
+      stream << '\n';
+      stream << parser.m_epilog << "\n\n";
+    }
+
+    return stream;
+  }
+
+  // Format help message
+  auto help() const -> std::stringstream {
+    std::stringstream out;
+    out << *this;
+    return out;
+  }
+
+  // Format usage part of help only
+  auto usage() const -> std::string {
+    std::stringstream stream;
+
+    stream << "Usage: " << this->m_program_name;
+
+    // Add any options inline here
+    for (const auto &argument : this->m_optional_arguments) {
+      stream << " " << argument.get_inline_usage();
+    }
+    // Put positional arguments after the optionals
+    for (const auto &argument : this->m_positional_arguments) {
+      if (!argument.m_metavar.empty()) {
+        stream << " " << argument.m_metavar;
+      } else {
+        stream << " " << argument.m_names.front();
+      }
+    }
+    // Put subcommands after positional arguments
+    if (!m_subparser_map.empty()) {
+      stream << " {";
+      std::size_t i{0};
+      for (const auto &[command, subparser] : m_subparser_map) {
+        if (subparser->get().m_suppress) {
+          continue;
+        }
+
+        if (i == 0) {
+          stream << command;
+        } else {
+          stream << "," << command;
+        }
+        ++i;
+      }
+      stream << "}";
+    }
+
+    return stream.str();
+  }
+
+  // Printing the one and only help message
+  // I've stuck with a simple message format, nothing fancy.
+  [[deprecated("Use cout << program; instead.  See also help().")]] std::string
+  print_help() const {
+    auto out = help();
+    std::cout << out.rdbuf();
+    return out.str();
+  }
+
+  void add_subparser(ArgumentParser &parser) {
+    parser.m_parser_path = m_program_name + " " + parser.m_program_name;
+    auto it = m_subparsers.emplace(std::cend(m_subparsers), parser);
+    m_subparser_map.insert_or_assign(parser.m_program_name, it);
+    m_subparser_used.insert_or_assign(parser.m_program_name, false);
+  }
+
+  void set_suppress(bool suppress) { m_suppress = suppress; }
+
+private:
+  bool is_valid_prefix_char(char c) const {
+    return m_prefix_chars.find(c) != std::string::npos;
+  }
+
+  char get_any_valid_prefix_char() const { return m_prefix_chars[0]; }
+
+  /*
+   * Pre-process this argument list. Anything starting with "--", that
+   * contains an =, where the prefix before the = has an entry in the
+   * options table, should be split.
+   */
+  std::vector<std::string>
+  preprocess_arguments(const std::vector<std::string> &raw_arguments) const {
+    std::vector<std::string> arguments{};
+    for (const auto &arg : raw_arguments) {
+
+      const auto argument_starts_with_prefix_chars =
+          [this](const std::string &a) -> bool {
+        if (!a.empty()) {
+
+          const auto legal_prefix = [this](char c) -> bool {
+            return m_prefix_chars.find(c) != std::string::npos;
+          };
+
+          // Windows-style
+          // if '/' is a legal prefix char
+          // then allow single '/' followed by argument name, followed by an
+          // assign char, e.g., ':' e.g., 'test.exe /A:Foo'
+          const auto windows_style = legal_prefix('/');
+
+          if (windows_style) {
+            if (legal_prefix(a[0])) {
+              return true;
+            }
+          } else {
+            // Slash '/' is not a legal prefix char
+            // For all other characters, only support long arguments
+            // i.e., the argument must start with 2 prefix chars, e.g,
+            // '--foo' e,g, './test --foo=Bar -DARG=yes'
+            if (a.size() > 1) {
+              return (legal_prefix(a[0]) && legal_prefix(a[1]));
+            }
+          }
+        }
+        return false;
+      };
+
+      // Check that:
+      // - We don't have an argument named exactly this
+      // - The argument starts with a prefix char, e.g., "--"
+      // - The argument contains an assign char, e.g., "="
+      auto assign_char_pos = arg.find_first_of(m_assign_chars);
+
+      if (m_argument_map.find(arg) == m_argument_map.end() &&
+          argument_starts_with_prefix_chars(arg) &&
+          assign_char_pos != std::string::npos) {
+        // Get the name of the potential option, and check it exists
+        std::string opt_name = arg.substr(0, assign_char_pos);
+        if (m_argument_map.find(opt_name) != m_argument_map.end()) {
+          // This is the name of an option! Split it into two parts
+          arguments.push_back(std::move(opt_name));
+          arguments.push_back(arg.substr(assign_char_pos + 1));
+          continue;
+        }
+      }
+      // If we've fallen through to here, then it's a standard argument
+      arguments.push_back(arg);
+    }
+    return arguments;
+  }
+
+  /*
+   * @throws std::runtime_error in case of any invalid argument
+   */
+  void parse_args_internal(const std::vector<std::string> &raw_arguments) {
+    auto arguments = preprocess_arguments(raw_arguments);
+    if (m_program_name.empty() && !arguments.empty()) {
+      m_program_name = arguments.front();
+    }
+    auto end = std::end(arguments);
+    auto positional_argument_it = std::begin(m_positional_arguments);
+    for (auto it = std::next(std::begin(arguments)); it != end;) {
+      const auto &current_argument = *it;
+      if (Argument::is_positional(current_argument, m_prefix_chars)) {
+        if (positional_argument_it == std::end(m_positional_arguments)) {
+
+          std::string_view maybe_command = current_argument;
+
+          // Check sub-parsers
+          auto subparser_it = m_subparser_map.find(maybe_command);
+          if (subparser_it != m_subparser_map.end()) {
+
+            // build list of remaining args
+            const auto unprocessed_arguments =
+                std::vector<std::string>(it, end);
+
+            // invoke subparser
+            m_is_parsed = true;
+            m_subparser_used[maybe_command] = true;
+            return subparser_it->second->get().parse_args(
+                unprocessed_arguments);
+          }
+
+          if (m_positional_arguments.empty()) {
+
+            // Ask the user if they argument they provided was a typo
+            // for some sub-parser,
+            // e.g., user provided `git totes` instead of `git notes`
+            if (!m_subparser_map.empty()) {
+              throw std::runtime_error(
+                  "Failed to parse '" + current_argument + "', did you mean '" +
+                  std::string{details::get_most_similar_string(
+                      m_subparser_map, current_argument)} +
+                  "'");
+            }
+
+            // Ask the user if they meant to use a specific optional argument
+            if (!m_optional_arguments.empty()) {
+              for (const auto &opt : m_optional_arguments) {
+                if (!opt.m_implicit_value.has_value()) {
+                  // not a flag, requires a value
+                  if (!opt.m_is_used) {
+                    throw std::runtime_error(
+                        "Zero positional arguments expected, did you mean " +
+                        opt.get_usage_full());
+                  }
+                }
+              }
+
+              throw std::runtime_error("Zero positional arguments expected");
+            } else {
+              throw std::runtime_error("Zero positional arguments expected");
+            }
+          } else {
+            throw std::runtime_error("Maximum number of positional arguments "
+                                     "exceeded, failed to parse '" +
+                                     current_argument + "'");
+          }
+        }
+        auto argument = positional_argument_it++;
+        it = argument->consume(it, end);
+        continue;
+      }
+
+      auto arg_map_it = m_argument_map.find(current_argument);
+      if (arg_map_it != m_argument_map.end()) {
+        auto argument = arg_map_it->second;
+        it = argument->consume(std::next(it), end, arg_map_it->first);
+      } else if (const auto &compound_arg = current_argument;
+                 compound_arg.size() > 1 &&
+                 is_valid_prefix_char(compound_arg[0]) &&
+                 !is_valid_prefix_char(compound_arg[1])) {
+        ++it;
+        for (std::size_t j = 1; j < compound_arg.size(); j++) {
+          auto hypothetical_arg = std::string{'-', compound_arg[j]};
+          auto arg_map_it2 = m_argument_map.find(hypothetical_arg);
+          if (arg_map_it2 != m_argument_map.end()) {
+            auto argument = arg_map_it2->second;
+            it = argument->consume(it, end, arg_map_it2->first);
+          } else {
+            throw std::runtime_error("Unknown argument: " + current_argument);
+          }
+        }
+      } else {
+        throw std::runtime_error("Unknown argument: " + current_argument);
+      }
+    }
+    m_is_parsed = true;
+  }
+
+  /*
+   * Like parse_args_internal but collects unused args into a vector<string>
+   */
+  std::vector<std::string>
+  parse_known_args_internal(const std::vector<std::string> &raw_arguments) {
+    auto arguments = preprocess_arguments(raw_arguments);
+
+    std::vector<std::string> unknown_arguments{};
+
+    if (m_program_name.empty() && !arguments.empty()) {
+      m_program_name = arguments.front();
+    }
+    auto end = std::end(arguments);
+    auto positional_argument_it = std::begin(m_positional_arguments);
+    for (auto it = std::next(std::begin(arguments)); it != end;) {
+      const auto &current_argument = *it;
+      if (Argument::is_positional(current_argument, m_prefix_chars)) {
+        if (positional_argument_it == std::end(m_positional_arguments)) {
+
+          std::string_view maybe_command = current_argument;
+
+          // Check sub-parsers
+          auto subparser_it = m_subparser_map.find(maybe_command);
+          if (subparser_it != m_subparser_map.end()) {
+
+            // build list of remaining args
+            const auto unprocessed_arguments =
+                std::vector<std::string>(it, end);
+
+            // invoke subparser
+            m_is_parsed = true;
+            m_subparser_used[maybe_command] = true;
+            return subparser_it->second->get().parse_known_args_internal(
+                unprocessed_arguments);
+          }
+
+          // save current argument as unknown and go to next argument
+          unknown_arguments.push_back(current_argument);
+          ++it;
+        } else {
+          // current argument is the value of a positional argument
+          // consume it
+          auto argument = positional_argument_it++;
+          it = argument->consume(it, end);
+        }
+        continue;
+      }
+
+      auto arg_map_it = m_argument_map.find(current_argument);
+      if (arg_map_it != m_argument_map.end()) {
+        auto argument = arg_map_it->second;
+        it = argument->consume(std::next(it), end, arg_map_it->first);
+      } else if (const auto &compound_arg = current_argument;
+                 compound_arg.size() > 1 &&
+                 is_valid_prefix_char(compound_arg[0]) &&
+                 !is_valid_prefix_char(compound_arg[1])) {
+        ++it;
+        for (std::size_t j = 1; j < compound_arg.size(); j++) {
+          auto hypothetical_arg = std::string{'-', compound_arg[j]};
+          auto arg_map_it2 = m_argument_map.find(hypothetical_arg);
+          if (arg_map_it2 != m_argument_map.end()) {
+            auto argument = arg_map_it2->second;
+            it = argument->consume(it, end, arg_map_it2->first);
+          } else {
+            unknown_arguments.push_back(current_argument);
+            break;
+          }
+        }
+      } else {
+        // current argument is an optional-like argument that is unknown
+        // save it and move to next argument
+        unknown_arguments.push_back(current_argument);
+        ++it;
+      }
+    }
+    m_is_parsed = true;
+    return unknown_arguments;
+  }
+
+  // Used by print_help.
+  std::size_t get_length_of_longest_argument() const {
+    if (m_argument_map.empty()) {
+      return 0;
+    }
+    std::size_t max_size = 0;
+    for ([[maybe_unused]] const auto &[unused, argument] : m_argument_map) {
+      max_size =
+          std::max<std::size_t>(max_size, argument->get_arguments_length());
+    }
+    for ([[maybe_unused]] const auto &[command, unused] : m_subparser_map) {
+      max_size = std::max<std::size_t>(max_size, command.size());
+    }
+    return max_size;
+  }
+
+  using argument_it = std::list<Argument>::iterator;
+  using mutex_group_it = std::vector<MutuallyExclusiveGroup>::iterator;
+  using argument_parser_it =
+      std::list<std::reference_wrapper<ArgumentParser>>::iterator;
+
+  void index_argument(argument_it it) {
+    for (const auto &name : std::as_const(it->m_names)) {
+      m_argument_map.insert_or_assign(name, it);
+    }
+  }
+
+  std::string m_program_name;
+  std::string m_version;
+  std::string m_description;
+  std::string m_epilog;
+  bool m_exit_on_default_arguments = true;
+  std::string m_prefix_chars{"-"};
+  std::string m_assign_chars{"="};
+  bool m_is_parsed = false;
+  std::list<Argument> m_positional_arguments;
+  std::list<Argument> m_optional_arguments;
+  std::map<std::string_view, argument_it> m_argument_map;
+  std::string m_parser_path;
+  std::list<std::reference_wrapper<ArgumentParser>> m_subparsers;
+  std::map<std::string_view, argument_parser_it> m_subparser_map;
+  std::map<std::string_view, bool> m_subparser_used;
+  std::vector<MutuallyExclusiveGroup> m_mutually_exclusive_groups;
+  bool m_suppress = false;
+};
+
+} // namespace argparse
diff --git a/bar.cpp b/bar.cpp
new file mode 100644
index 0000000..f415fd8
--- /dev/null
+++ b/bar.cpp
@@ -0,0 +1,57 @@
+#include "bar.h"
+
+#include <indicators/setting.hpp>
+#include <indicators/cursor_control.hpp>
+#include <atomic>
+
+static std::atomic<bool> stopBar = false;
+
+void bar_stop_indeterminate(std::thread* thread)
+{
+	stopBar = true;
+	thread->join();
+	delete thread;
+	stopBar = false;
+}
+
+static void bar_indeterminate_thread(std::string text)
+{
+	indicators::IndeterminateProgressBar bar{indicators::option::BarWidth{50},
+		indicators::option::BarWidth{50},
+		indicators::option::Start{"["},
+		indicators::option::Fill{"·"},
+		indicators::option::Lead{"<==>"},
+		indicators::option::End{"]"},
+		indicators::option::PostfixText{text},
+	};
+	//indicators::show_console_cursor(false);
+	while(!stopBar)
+	{
+		bar.tick();
+		std::this_thread::sleep_for(std::chrono::milliseconds(100));
+	}
+	indicators::show_console_cursor(true);
+}
+
+std::thread* bar_create_new_indeterminate(const std::string& text)
+{
+	return new std::thread(bar_indeterminate_thread, text);
+}
+
+indicators::ProgressBar* bar_create_new(std::string text, size_t maxProgress)
+{
+	indicators::ProgressBar *bar = new indicators::ProgressBar{
+		indicators::option::Start{" ["},
+		indicators::option::Fill{"="},
+		indicators::option::Lead{">"},
+		indicators::option::Remainder{" "},
+		indicators::option::End{"]"},
+		indicators::option::BarWidth{80},
+		indicators::option::MaxProgress{maxProgress},
+		indicators::option::PrefixText{text},
+		indicators::option::ShowPercentage{true},
+		indicators::option::ShowElapsedTime{true},
+		indicators::option::ShowRemainingTime{true},
+	};
+	return bar;
+}
diff --git a/bar.h b/bar.h
new file mode 100644
index 0000000..8546100
--- /dev/null
+++ b/bar.h
@@ -0,0 +1,9 @@
+#pragma once
+#include <thread>
+#include <indicators/indeterminate_progress_bar.hpp>
+#include <indicators/progress_bar.hpp>
+
+std::thread* bar_create_new_indeterminate(const std::string& text);
+void bar_stop_indeterminate(std::thread* thread);
+
+indicators::ProgressBar* bar_create_new(std::string text, size_t maxProgress);
diff --git a/get-models.sh b/get-models.sh
new file mode 100644
index 0000000..e69de29
diff --git a/incbin.h b/incbin.h
new file mode 100644
index 0000000..3f662e1
--- /dev/null
+++ b/incbin.h
@@ -0,0 +1,476 @@
+/**
+ * @file incbin.h
+ * @author Dale Weiler
+ * @brief Utility for including binary files
+ *
+ * Facilities for including binary files into the current translation unit and
+ * making use from them externally in other translation units.
+ */
+#ifndef INCBIN_HDR
+#define INCBIN_HDR
+#include <limits.h>
+#if   defined(__AVX512BW__) || \
+      defined(__AVX512CD__) || \
+      defined(__AVX512DQ__) || \
+      defined(__AVX512ER__) || \
+      defined(__AVX512PF__) || \
+      defined(__AVX512VL__) || \
+      defined(__AVX512F__)
+# define INCBIN_ALIGNMENT_INDEX 6
+#elif defined(__AVX__)      || \
+      defined(__AVX2__)
+# define INCBIN_ALIGNMENT_INDEX 5
+#elif defined(__SSE__)      || \
+      defined(__SSE2__)     || \
+      defined(__SSE3__)     || \
+      defined(__SSSE3__)    || \
+      defined(__SSE4_1__)   || \
+      defined(__SSE4_2__)   || \
+      defined(__neon__)     || \
+      defined(__ARM_NEON)   || \
+      defined(__ALTIVEC__)
+# define INCBIN_ALIGNMENT_INDEX 4
+#elif ULONG_MAX != 0xffffffffu
+# define INCBIN_ALIGNMENT_INDEX 3
+# else
+# define INCBIN_ALIGNMENT_INDEX 2
+#endif
+
+/* Lookup table of (1 << n) where `n' is `INCBIN_ALIGNMENT_INDEX' */
+#define INCBIN_ALIGN_SHIFT_0 1
+#define INCBIN_ALIGN_SHIFT_1 2
+#define INCBIN_ALIGN_SHIFT_2 4
+#define INCBIN_ALIGN_SHIFT_3 8
+#define INCBIN_ALIGN_SHIFT_4 16
+#define INCBIN_ALIGN_SHIFT_5 32
+#define INCBIN_ALIGN_SHIFT_6 64
+
+/* Actual alignment value */
+#define INCBIN_ALIGNMENT \
+    INCBIN_CONCATENATE( \
+        INCBIN_CONCATENATE(INCBIN_ALIGN_SHIFT, _), \
+        INCBIN_ALIGNMENT_INDEX)
+
+/* Stringize */
+#define INCBIN_STR(X) \
+    #X
+#define INCBIN_STRINGIZE(X) \
+    INCBIN_STR(X)
+/* Concatenate */
+#define INCBIN_CAT(X, Y) \
+    X ## Y
+#define INCBIN_CONCATENATE(X, Y) \
+    INCBIN_CAT(X, Y)
+/* Deferred macro expansion */
+#define INCBIN_EVAL(X) \
+    X
+#define INCBIN_INVOKE(N, ...) \
+    INCBIN_EVAL(N(__VA_ARGS__))
+/* Variable argument count for overloading by arity */
+#define INCBIN_VA_ARG_COUNTER(_1, _2, _3, N, ...) N
+#define INCBIN_VA_ARGC(...) INCBIN_VA_ARG_COUNTER(__VA_ARGS__, 3, 2, 1, 0)
+
+/* Green Hills uses a different directive for including binary data */
+#if defined(__ghs__)
+#  if (__ghs_asm == 2)
+#    define INCBIN_MACRO ".file"
+/* Or consider the ".myrawdata" entry in the ld file */
+#  else
+#    define INCBIN_MACRO "\tINCBIN"
+#  endif
+#else
+#  define INCBIN_MACRO ".incbin"
+#endif
+
+#ifndef _MSC_VER
+#  define INCBIN_ALIGN \
+    __attribute__((aligned(INCBIN_ALIGNMENT)))
+#else
+#  define INCBIN_ALIGN __declspec(align(INCBIN_ALIGNMENT))
+#endif
+
+#if defined(__arm__) || /* GNU C and RealView */ \
+    defined(__arm) || /* Diab */ \
+    defined(_ARM) /* ImageCraft */
+#  define INCBIN_ARM
+#endif
+
+#ifdef __GNUC__
+/* Utilize .balign where supported */
+#  define INCBIN_ALIGN_HOST ".balign " INCBIN_STRINGIZE(INCBIN_ALIGNMENT) "\n"
+#  define INCBIN_ALIGN_BYTE ".balign 1\n"
+#elif defined(INCBIN_ARM)
+/*
+ * On arm assemblers, the alignment value is calculated as (1 << n) where `n' is
+ * the shift count. This is the value passed to `.align'
+ */
+#  define INCBIN_ALIGN_HOST ".align " INCBIN_STRINGIZE(INCBIN_ALIGNMENT_INDEX) "\n"
+#  define INCBIN_ALIGN_BYTE ".align 0\n"
+#else
+/* We assume other inline assembler's treat `.align' as `.balign' */
+#  define INCBIN_ALIGN_HOST ".align " INCBIN_STRINGIZE(INCBIN_ALIGNMENT) "\n"
+#  define INCBIN_ALIGN_BYTE ".align 1\n"
+#endif
+
+/* INCBIN_CONST is used by incbin.c generated files */
+#if defined(__cplusplus)
+#  define INCBIN_EXTERNAL extern "C"
+#  define INCBIN_CONST    extern const
+#else
+#  define INCBIN_EXTERNAL extern
+#  define INCBIN_CONST    const
+#endif
+
+/**
+ * @brief Optionally override the linker section into which size and data is
+ * emitted.
+ * 
+ * @warning If you use this facility, you might have to deal with
+ * platform-specific linker output section naming on your own.
+ */
+#if !defined(INCBIN_OUTPUT_SECTION)
+#  if defined(__APPLE__)
+#    define INCBIN_OUTPUT_SECTION ".const_data"
+#  else
+#    define INCBIN_OUTPUT_SECTION ".rodata"
+#  endif
+#endif
+
+/**
+ * @brief Optionally override the linker section into which data is emitted.
+ *
+ * @warning If you use this facility, you might have to deal with
+ * platform-specific linker output section naming on your own.
+ */
+#if !defined(INCBIN_OUTPUT_DATA_SECTION)
+#  define INCBIN_OUTPUT_DATA_SECTION INCBIN_OUTPUT_SECTION
+#endif
+
+/**
+ * @brief Optionally override the linker section into which size is emitted.
+ *
+ * @warning If you use this facility, you might have to deal with
+ * platform-specific linker output section naming on your own.
+ * 
+ * @note This is useful for Harvard architectures where program memory cannot
+ * be directly read from the program without special instructions. With this you
+ * can chose to put the size variable in RAM rather than ROM.
+ */
+#if !defined(INCBIN_OUTPUT_SIZE_SECTION)
+#  define INCBIN_OUTPUT_SIZE_SECTION INCBIN_OUTPUT_SECTION
+#endif
+
+#if defined(__APPLE__)
+#  include "TargetConditionals.h"
+#  if defined(TARGET_OS_IPHONE) && !defined(INCBIN_SILENCE_BITCODE_WARNING)
+#    warning "incbin is incompatible with bitcode. Using the library will break upload to App Store if you have bitcode enabled. Add `#define INCBIN_SILENCE_BITCODE_WARNING` before including this header to silence this warning."
+#  endif
+/* The directives are different for Apple branded compilers */
+#  define INCBIN_SECTION         INCBIN_OUTPUT_SECTION "\n"
+#  define INCBIN_GLOBAL(NAME)    ".globl " INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME "\n"
+#  define INCBIN_INT             ".long "
+#  define INCBIN_MANGLE          "_"
+#  define INCBIN_BYTE            ".byte "
+#  define INCBIN_TYPE(...)
+#else
+#  define INCBIN_SECTION         ".section " INCBIN_OUTPUT_SECTION "\n"
+#  define INCBIN_GLOBAL(NAME)    ".global " INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME "\n"
+#  if defined(__ghs__)
+#    define INCBIN_INT           ".word "
+#  else
+#    define INCBIN_INT           ".int "
+#  endif
+#  if defined(__USER_LABEL_PREFIX__)
+#    define INCBIN_MANGLE        INCBIN_STRINGIZE(__USER_LABEL_PREFIX__)
+#  else
+#    define INCBIN_MANGLE        ""
+#  endif
+#  if defined(INCBIN_ARM)
+/* On arm assemblers, `@' is used as a line comment token */
+#    define INCBIN_TYPE(NAME)    ".type " INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME ", %object\n"
+#  elif defined(__MINGW32__) || defined(__MINGW64__)
+/* Mingw doesn't support this directive either */
+#    define INCBIN_TYPE(NAME)
+#  else
+/* It's safe to use `@' on other architectures */
+#    define INCBIN_TYPE(NAME)    ".type " INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME ", @object\n"
+#  endif
+#  define INCBIN_BYTE            ".byte "
+#endif
+
+/* List of style types used for symbol names */
+#define INCBIN_STYLE_CAMEL 0
+#define INCBIN_STYLE_SNAKE 1
+
+/**
+ * @brief Specify the prefix to use for symbol names.
+ *
+ * @note By default this is "g".
+ *
+ * @code
+ * #define INCBIN_PREFIX incbin
+ * #include "incbin.h"
+ * INCBIN(Foo, "foo.txt");
+ *
+ * // Now you have the following symbols instead:
+ * // const unsigned char incbinFoo<data>[];
+ * // const unsigned char *const incbinFoo<end>;
+ * // const unsigned int incbinFoo<size>;
+ * @endcode
+ */
+#if !defined(INCBIN_PREFIX)
+#  define INCBIN_PREFIX g
+#endif
+
+/**
+ * @brief Specify the style used for symbol names.
+ *
+ * Possible options are
+ * - INCBIN_STYLE_CAMEL "CamelCase"
+ * - INCBIN_STYLE_SNAKE "snake_case"
+ *
+ * @note By default this is INCBIN_STYLE_CAMEL
+ *
+ * @code
+ * #define INCBIN_STYLE INCBIN_STYLE_SNAKE
+ * #include "incbin.h"
+ * INCBIN(foo, "foo.txt");
+ *
+ * // Now you have the following symbols:
+ * // const unsigned char <prefix>foo_data[];
+ * // const unsigned char *const <prefix>foo_end;
+ * // const unsigned int <prefix>foo_size;
+ * @endcode
+ */
+#if !defined(INCBIN_STYLE)
+#  define INCBIN_STYLE INCBIN_STYLE_CAMEL
+#endif
+
+/* Style lookup tables */
+#define INCBIN_STYLE_0_DATA Data
+#define INCBIN_STYLE_0_END End
+#define INCBIN_STYLE_0_SIZE Size
+#define INCBIN_STYLE_1_DATA _data
+#define INCBIN_STYLE_1_END _end
+#define INCBIN_STYLE_1_SIZE _size
+
+/* Style lookup: returning identifier */
+#define INCBIN_STYLE_IDENT(TYPE) \
+    INCBIN_CONCATENATE( \
+        INCBIN_STYLE_, \
+        INCBIN_CONCATENATE( \
+            INCBIN_EVAL(INCBIN_STYLE), \
+            INCBIN_CONCATENATE(_, TYPE)))
+
+/* Style lookup: returning string literal */
+#define INCBIN_STYLE_STRING(TYPE) \
+    INCBIN_STRINGIZE( \
+        INCBIN_STYLE_IDENT(TYPE)) \
+
+/* Generate the global labels by indirectly invoking the macro with our style
+ * type and concatenating the name against them. */
+#define INCBIN_GLOBAL_LABELS(NAME, TYPE) \
+    INCBIN_INVOKE( \
+        INCBIN_GLOBAL, \
+        INCBIN_CONCATENATE( \
+            NAME, \
+            INCBIN_INVOKE( \
+                INCBIN_STYLE_IDENT, \
+                TYPE))) \
+    INCBIN_INVOKE( \
+        INCBIN_TYPE, \
+        INCBIN_CONCATENATE( \
+            NAME, \
+            INCBIN_INVOKE( \
+                INCBIN_STYLE_IDENT, \
+                TYPE)))
+
+/**
+ * @brief Externally reference binary data included in another translation unit.
+ *
+ * Produces three external symbols that reference the binary data included in
+ * another translation unit.
+ *
+ * The symbol names are a concatenation of `INCBIN_PREFIX' before *NAME*; with
+ * "Data", as well as "End" and "Size" after. An example is provided below.
+ *
+ * @param TYPE Optional array type. Omitting this picks a default of `unsigned char`.
+ * @param NAME The name given for the binary data
+ *
+ * @code
+ * INCBIN_EXTERN(Foo);
+ *
+ * // Now you have the following symbols:
+ * // extern const unsigned char <prefix>Foo<data>[];
+ * // extern const unsigned char *const <prefix>Foo<end>;
+ * // extern const unsigned int <prefix>Foo<size>;
+ * @endcode
+ * 
+ * You may specify a custom optional data type as well as the first argument.
+ * @code
+ * INCBIN_EXTERN(custom_type, Foo);
+ * 
+ * // Now you have the following symbols:
+ * // extern const custom_type <prefix>Foo<data>[];
+ * // extern const custom_type *const <prefix>Foo<end>;
+ * // extern const unsigned int <prefix>Foo<size>;
+ * @endcode
+ */
+#define INCBIN_EXTERN(...) \
+    INCBIN_CONCATENATE(INCBIN_EXTERN_, INCBIN_VA_ARGC(__VA_ARGS__))(__VA_ARGS__)
+#define INCBIN_EXTERN_1(NAME, ...) \
+    INCBIN_EXTERN_2(unsigned char, NAME)
+#define INCBIN_EXTERN_2(TYPE, NAME) \
+    INCBIN_EXTERNAL const INCBIN_ALIGN TYPE \
+        INCBIN_CONCATENATE( \
+            INCBIN_CONCATENATE(INCBIN_PREFIX, NAME), \
+            INCBIN_STYLE_IDENT(DATA))[]; \
+    INCBIN_EXTERNAL const INCBIN_ALIGN TYPE *const \
+    INCBIN_CONCATENATE( \
+        INCBIN_CONCATENATE(INCBIN_PREFIX, NAME), \
+        INCBIN_STYLE_IDENT(END)); \
+    INCBIN_EXTERNAL const unsigned int \
+        INCBIN_CONCATENATE( \
+            INCBIN_CONCATENATE(INCBIN_PREFIX, NAME), \
+            INCBIN_STYLE_IDENT(SIZE))
+
+/**
+ * @brief Externally reference textual data included in another translation unit.
+ *
+ * Produces three external symbols that reference the textual data included in
+ * another translation unit.
+ *
+ * The symbol names are a concatenation of `INCBIN_PREFIX' before *NAME*; with
+ * "Data", as well as "End" and "Size" after. An example is provided below.
+ *
+ * @param NAME The name given for the textual data
+ *
+ * @code
+ * INCBIN_EXTERN(Foo);
+ *
+ * // Now you have the following symbols:
+ * // extern const char <prefix>Foo<data>[];
+ * // extern const char *const <prefix>Foo<end>;
+ * // extern const unsigned int <prefix>Foo<size>;
+ * @endcode
+ */
+#define INCTXT_EXTERN(NAME) \
+    INCBIN_EXTERN_2(char, NAME)
+
+/**
+ * @brief Include a binary file into the current translation unit.
+ *
+ * Includes a binary file into the current translation unit, producing three symbols
+ * for objects that encode the data and size respectively.
+ *
+ * The symbol names are a concatenation of `INCBIN_PREFIX' before *NAME*; with
+ * "Data", as well as "End" and "Size" after. An example is provided below.
+ *
+ * @param TYPE Optional array type. Omitting this picks a default of `unsigned char`.
+ * @param NAME The name to associate with this binary data (as an identifier.)
+ * @param FILENAME The file to include (as a string literal.)
+ *
+ * @code
+ * INCBIN(Icon, "icon.png");
+ *
+ * // Now you have the following symbols:
+ * // const unsigned char <prefix>Icon<data>[];
+ * // const unsigned char *const <prefix>Icon<end>;
+ * // const unsigned int <prefix>Icon<size>;
+ * @endcode
+ * 
+ * You may specify a custom optional data type as well as the first argument.
+ * These macros are specialized by arity.
+ * @code
+ * INCBIN(custom_type, Icon, "icon.png");
+ *
+ * // Now you have the following symbols:
+ * // const custom_type <prefix>Icon<data>[];
+ * // const custom_type *const <prefix>Icon<end>;
+ * // const unsigned int <prefix>Icon<size>;
+ * @endcode
+ *
+ * @warning This must be used in global scope
+ * @warning The identifiers may be different if INCBIN_STYLE is not default
+ *
+ * To externally reference the data included by this in another translation unit
+ * please @see INCBIN_EXTERN.
+ */
+#ifdef _MSC_VER
+#  define INCBIN(NAME, FILENAME) \
+      INCBIN_EXTERN(NAME)
+#else
+#  define INCBIN(...) \
+     INCBIN_CONCATENATE(INCBIN_, INCBIN_VA_ARGC(__VA_ARGS__))(__VA_ARGS__)
+#  if defined(__GNUC__)
+#    define INCBIN_1(...) _Pragma("GCC error \"Single argument INCBIN not allowed\"")
+#  elif defined(__clang__)
+#    define INCBIN_1(...) _Pragma("clang error \"Single argument INCBIN not allowed\"")
+#  else
+#    define INCBIN_1(...) /* Cannot do anything here */
+#  endif
+#  define INCBIN_2(NAME, FILENAME) \
+      INCBIN_3(unsigned char, NAME, FILENAME)
+#  define INCBIN_3(TYPE, NAME, FILENAME) INCBIN_COMMON(TYPE, NAME, FILENAME, /* No terminator for binary data */)
+#  define INCBIN_COMMON(TYPE, NAME, FILENAME, TERMINATOR) \
+    __asm__(INCBIN_SECTION \
+            INCBIN_GLOBAL_LABELS(NAME, DATA) \
+            INCBIN_ALIGN_HOST \
+            INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME INCBIN_STYLE_STRING(DATA) ":\n" \
+            INCBIN_MACRO " \"" FILENAME "\"\n" \
+                TERMINATOR \
+            INCBIN_GLOBAL_LABELS(NAME, END) \
+            INCBIN_ALIGN_BYTE \
+            INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME INCBIN_STYLE_STRING(END) ":\n" \
+                INCBIN_BYTE "1\n" \
+            INCBIN_GLOBAL_LABELS(NAME, SIZE) \
+            INCBIN_ALIGN_HOST \
+            INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME INCBIN_STYLE_STRING(SIZE) ":\n" \
+                INCBIN_INT INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME INCBIN_STYLE_STRING(END) " - " \
+                           INCBIN_MANGLE INCBIN_STRINGIZE(INCBIN_PREFIX) #NAME INCBIN_STYLE_STRING(DATA) "\n" \
+            INCBIN_ALIGN_HOST \
+            ".text\n" \
+    ); \
+    INCBIN_EXTERN(TYPE, NAME)
+#endif
+
+/**
+ * @brief Include a textual file into the current translation unit.
+ * 
+ * This behaves the same as INCBIN except it produces char compatible arrays
+ * and implicitly adds a null-terminator byte, thus the size of data included
+ * by this is one byte larger than that of INCBIN.
+ *
+ * Includes a textual file into the current translation unit, producing three
+ * symbols for objects that encode the data and size respectively.
+ *
+ * The symbol names are a concatenation of `INCBIN_PREFIX' before *NAME*; with
+ * "Data", as well as "End" and "Size" after. An example is provided below.
+ *
+ * @param NAME The name to associate with this binary data (as an identifier.)
+ * @param FILENAME The file to include (as a string literal.)
+ *
+ * @code
+ * INCTXT(Readme, "readme.txt");
+ *
+ * // Now you have the following symbols:
+ * // const char <prefix>Readme<data>[];
+ * // const char *const <prefix>Readme<end>;
+ * // const unsigned int <prefix>Readme<size>;
+ * @endcode
+ *
+ * @warning This must be used in global scope
+ * @warning The identifiers may be different if INCBIN_STYLE is not default
+ *
+ * To externally reference the data included by this in another translation unit
+ * please @see INCBIN_EXTERN.
+ */
+#if defined(_MSC_VER)
+#  define INCTXT(NAME, FILENAME) \
+     INCBIN_EXTERN(NAME)
+#else
+#  define INCTXT(NAME, FILENAME) \
+     INCBIN_COMMON(char, NAME, FILENAME, INCBIN_BYTE "0\n")
+#endif
+
+#endif
\ No newline at end of file
diff --git a/indicators/block_progress_bar.hpp b/indicators/block_progress_bar.hpp
new file mode 100644
index 0000000..fcffdaf
--- /dev/null
+++ b/indicators/block_progress_bar.hpp
@@ -0,0 +1,292 @@
+
+#ifndef INDICATORS_BLOCK_PROGRESS_BAR
+#define INDICATORS_BLOCK_PROGRESS_BAR
+
+#include <indicators/color.hpp>
+#include <indicators/details/stream_helper.hpp>
+
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <indicators/setting.hpp>
+#include <indicators/terminal_size.hpp>
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <tuple>
+#include <utility>
+
+namespace indicators {
+
+class BlockProgressBar {
+  using Settings = std::tuple<option::ForegroundColor, option::BarWidth, option::Start, option::End,
+                              option::PrefixText, option::PostfixText, option::ShowPercentage,
+                              option::ShowElapsedTime, option::ShowRemainingTime, option::Completed,
+                              option::SavedStartTime, option::MaxPostfixTextLen, option::FontStyles,
+                              option::MaxProgress, option::Stream>;
+
+public:
+  template <typename... Args,
+            typename std::enable_if<details::are_settings_from_tuple<
+                                        Settings, typename std::decay<Args>::type...>::value,
+                                    void *>::type = nullptr>
+  explicit BlockProgressBar(Args &&... args)
+      : settings_(details::get<details::ProgressBarOption::foreground_color>(
+                      option::ForegroundColor{Color::unspecified}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::bar_width>(option::BarWidth{100},
+                                                                      std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::start>(option::Start{"["},
+                                                                  std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::end>(option::End{"]"},
+                                                                std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::prefix_text>(
+                      option::PrefixText{""}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::postfix_text>(
+                      option::PostfixText{""}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::show_percentage>(
+                      option::ShowPercentage{true}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::show_elapsed_time>(
+                      option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::show_remaining_time>(
+                      option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::completed>(option::Completed{false},
+                                                                      std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::saved_start_time>(
+                      option::SavedStartTime{false}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::max_postfix_text_len>(
+                      option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::font_styles>(
+                      option::FontStyles{std::vector<FontStyle>{}}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::max_progress>(
+                      option::MaxProgress{100}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::stream>(option::Stream{std::cout},
+                                                                   std::forward<Args>(args)...)) {}
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id> &&setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = std::move(setting).value;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id> &setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = setting.value;
+  }
+
+  void set_option(
+      const details::Setting<std::string, details::ProgressBarOption::postfix_text> &setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if (setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
+    }
+  }
+
+  void
+  set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text> &&setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto &new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if (new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
+  }
+
+  void set_progress(float value) {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      progress_ = value;
+    }
+    save_start_time();
+    print_progress();
+  }
+
+  void tick() {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      progress_ += 1;
+    }
+    save_start_time();
+    print_progress();
+  }
+
+  size_t current() {
+    std::lock_guard<std::mutex> lock{mutex_};
+    return (std::min)(static_cast<size_t>(progress_),
+                    size_t(get_value<details::ProgressBarOption::max_progress>()));
+  }
+
+  bool is_completed() const { return get_value<details::ProgressBarOption::completed>(); }
+
+  void mark_as_completed() {
+    get_value<details::ProgressBarOption::completed>() = true;
+    print_progress();
+  }
+
+private:
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const
+      -> decltype((details::get_value<id>(std::declval<const Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  Settings settings_;
+  float progress_{0.0};
+  std::chrono::time_point<std::chrono::high_resolution_clock> start_time_point_;
+  std::mutex mutex_;
+
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  template <typename Indicator> friend class DynamicProgress;
+  std::atomic<bool> multi_progress_mode_{false};
+
+  void save_start_time() {
+    auto &show_elapsed_time = get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto &saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+    auto &show_remaining_time = get_value<details::ProgressBarOption::show_remaining_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      start_time_point_ = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
+    }
+  }
+
+  std::pair<std::string, int> get_prefix_text() {
+    std::stringstream os;
+    os << get_value<details::ProgressBarOption::prefix_text>();
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+  std::pair<std::string, int> get_postfix_text() {
+    std::stringstream os;
+    const auto max_progress = get_value<details::ProgressBarOption::max_progress>();
+    auto now = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(now - start_time_point_);
+
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
+      os << " " << (std::min)(static_cast<size_t>(progress_ / max_progress * 100.0), size_t(100))
+         << "%";
+    }
+
+    auto &saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      os << " [";
+      if (saved_start_time)
+        details::write_duration(os, elapsed);
+      else
+        os << "00:00s";
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "<";
+      else
+        os << " [";
+
+      if (saved_start_time) {
+        auto eta = std::chrono::nanoseconds(
+            progress_ > 0
+                ? static_cast<long long>(std::ceil(float(elapsed.count()) *
+                                                   max_progress / progress_))
+                : 0);
+        auto remaining = eta > elapsed ? (eta - elapsed) : (elapsed - eta);
+        details::write_duration(os, remaining);
+      } else {
+        os << "00:00s";
+      }
+
+      os << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "]";
+    }
+
+    os << " " << get_value<details::ProgressBarOption::postfix_text>();
+
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+public:
+  void print_progress(bool from_multi_progress = false) {
+    std::lock_guard<std::mutex> lock{mutex_};
+
+    auto &os = get_value<details::ProgressBarOption::stream>();
+
+    const auto max_progress = get_value<details::ProgressBarOption::max_progress>();
+    if (multi_progress_mode_ && !from_multi_progress) {
+      if (progress_ > max_progress) {
+        get_value<details::ProgressBarOption::completed>() = true;
+      }
+      return;
+    }
+
+    if (get_value<details::ProgressBarOption::foreground_color>() != Color::unspecified)
+      details::set_stream_color(os, get_value<details::ProgressBarOption::foreground_color>());
+
+    for (auto &style : get_value<details::ProgressBarOption::font_styles>())
+      details::set_font_style(os, style);
+
+    const auto prefix_pair = get_prefix_text();
+    const auto prefix_text = prefix_pair.first;
+    const auto prefix_length = prefix_pair.second;
+    os << "\r" << prefix_text;
+
+    os << get_value<details::ProgressBarOption::start>();
+
+    details::BlockProgressScaleWriter writer{os,
+                                             get_value<details::ProgressBarOption::bar_width>()};
+    writer.write(progress_ / max_progress * 100);
+
+    os << get_value<details::ProgressBarOption::end>();
+
+    const auto postfix_pair = get_postfix_text();
+    const auto postfix_text = postfix_pair.first;
+    const auto postfix_length = postfix_pair.second;
+    os << postfix_text;
+
+    // Get length of prefix text and postfix text
+    const auto start_length = get_value<details::ProgressBarOption::start>().size();
+    const auto bar_width = get_value<details::ProgressBarOption::bar_width>();
+    const auto end_length = get_value<details::ProgressBarOption::end>().size();
+    const auto terminal_width = terminal_size().second;
+    // prefix + bar_width + postfix should be <= terminal_width
+    const int remaining = terminal_width - (prefix_length + start_length + bar_width + end_length + postfix_length);
+    if (prefix_length == -1 || postfix_length == -1) {
+      os << "\r";
+    } else if (remaining > 0) {
+      os << std::string(remaining, ' ') << "\r";
+    } else if (remaining < 0) {
+      // Do nothing. Maybe in the future truncate postfix with ...
+    }
+    os.flush();
+
+    if (progress_ > max_progress) {
+      get_value<details::ProgressBarOption::completed>() = true;
+    }
+    if (get_value<details::ProgressBarOption::completed>() &&
+        !from_multi_progress) // Don't std::endl if calling from MultiProgress
+      os << termcolor::reset << std::endl;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/color.hpp b/indicators/color.hpp
new file mode 100644
index 0000000..19dc0e5
--- /dev/null
+++ b/indicators/color.hpp
@@ -0,0 +1,9 @@
+
+#ifndef INDICATORS_COLOR
+#define INDICATORS_COLOR
+
+namespace indicators {
+enum class Color { grey, red, green, yellow, blue, magenta, cyan, white, unspecified };
+}
+
+#endif
diff --git a/indicators/cursor_control.hpp b/indicators/cursor_control.hpp
new file mode 100644
index 0000000..641156f
--- /dev/null
+++ b/indicators/cursor_control.hpp
@@ -0,0 +1,66 @@
+
+#ifndef INDICATORS_CURSOR_CONTROL
+#define INDICATORS_CURSOR_CONTROL
+
+#if defined(_MSC_VER)
+#if !defined(NOMINMAX)
+#define NOMINMAX
+#endif
+#include <io.h>
+#include <windows.h>
+#else
+#include <cstdio>
+#endif
+
+namespace indicators {
+
+#if defined(_MSC_VER)
+
+static inline void show_console_cursor(bool const show) {
+  HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE);
+
+  CONSOLE_CURSOR_INFO cursorInfo;
+
+  GetConsoleCursorInfo(out, &cursorInfo);
+  cursorInfo.bVisible = show; // set the cursor visibility
+  SetConsoleCursorInfo(out, &cursorInfo);
+}
+
+static inline void erase_line() {
+  auto hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
+  if (!hStdout)
+    return;
+
+  CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
+  GetConsoleScreenBufferInfo(hStdout, &csbiInfo);
+
+  COORD cursor;
+
+  cursor.X = 0;
+  cursor.Y = csbiInfo.dwCursorPosition.Y;
+
+  DWORD count = 0;
+
+  FillConsoleOutputCharacterA(hStdout, ' ', csbiInfo.dwSize.X, cursor, &count);
+
+  FillConsoleOutputAttribute(hStdout, csbiInfo.wAttributes, csbiInfo.dwSize.X,
+                             cursor, &count);
+
+  SetConsoleCursorPosition(hStdout, cursor);
+}
+
+#else
+
+static inline void show_console_cursor(bool const show) {
+  std::fputs(show ? "\033[?25h" : "\033[?25l", stdout);
+}
+
+static inline void erase_line() {
+  std::fputs("\r\033[K", stdout);
+}
+
+#endif
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/cursor_movement.hpp b/indicators/cursor_movement.hpp
new file mode 100644
index 0000000..1081b7f
--- /dev/null
+++ b/indicators/cursor_movement.hpp
@@ -0,0 +1,50 @@
+
+#ifndef INDICATORS_CURSOR_MOVEMENT
+#define INDICATORS_CURSOR_MOVEMENT
+
+#if defined(_MSC_VER)
+#if !defined(NOMINMAX)
+#define NOMINMAX
+#endif
+#include <io.h>
+#include <windows.h>
+#else
+#include <iostream>
+#endif
+
+namespace indicators {
+
+#ifdef _MSC_VER
+
+static inline void move(int x, int y) {
+  auto hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
+  if (!hStdout)
+    return;
+
+  CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
+  GetConsoleScreenBufferInfo(hStdout, &csbiInfo);
+
+  COORD cursor;
+
+  cursor.X = csbiInfo.dwCursorPosition.X + x;
+  cursor.Y = csbiInfo.dwCursorPosition.Y + y;
+  SetConsoleCursorPosition(hStdout, cursor);
+}
+
+static inline void move_up(int lines) { move(0, -lines); }
+static inline void move_down(int lines) { move(0, -lines); }
+static inline void move_right(int cols) { move(cols, 0); }
+static inline void move_left(int cols) { move(-cols, 0); }
+
+#else
+
+static inline void move_up(int lines) { std::cout << "\033[" << lines << "A"; }
+static inline void move_down(int lines) { std::cout << "\033[" << lines << "B"; }
+static inline void move_right(int cols) { std::cout << "\033[" << cols << "C"; }
+static inline void move_left(int cols) { std::cout << "\033[" << cols << "D"; }
+
+#endif
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/details/stream_helper.hpp b/indicators/details/stream_helper.hpp
new file mode 100644
index 0000000..48d06b8
--- /dev/null
+++ b/indicators/details/stream_helper.hpp
@@ -0,0 +1,223 @@
+
+#ifndef INDICATORS_STREAM_HELPER
+#define INDICATORS_STREAM_HELPER
+
+#include <indicators/display_width.hpp>
+#include <indicators/setting.hpp>
+#include <indicators/termcolor.hpp>
+
+#include <algorithm>
+#include <chrono>
+#include <iomanip>
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include <cassert>
+#include <cmath>
+
+namespace indicators {
+namespace details {
+
+inline void set_stream_color(std::ostream &os, Color color) {
+  switch (color) {
+  case Color::grey:
+    os << termcolor::grey;
+    break;
+  case Color::red:
+    os << termcolor::red;
+    break;
+  case Color::green:
+    os << termcolor::green;
+    break;
+  case Color::yellow:
+    os << termcolor::yellow;
+    break;
+  case Color::blue:
+    os << termcolor::blue;
+    break;
+  case Color::magenta:
+    os << termcolor::magenta;
+    break;
+  case Color::cyan:
+    os << termcolor::cyan;
+    break;
+  case Color::white:
+    os << termcolor::white;
+    break;
+  default:
+    assert(false);
+  }
+}
+
+inline void set_font_style(std::ostream &os, FontStyle style) {
+  switch (style) {
+  case FontStyle::bold:
+    os << termcolor::bold;
+    break;
+  case FontStyle::dark:
+    os << termcolor::dark;
+    break;
+  case FontStyle::italic:
+    os << termcolor::italic;
+    break;
+  case FontStyle::underline:
+    os << termcolor::underline;
+    break;
+  case FontStyle::blink:
+    os << termcolor::blink;
+    break;
+  case FontStyle::reverse:
+    os << termcolor::reverse;
+    break;
+  case FontStyle::concealed:
+    os << termcolor::concealed;
+    break;
+  case FontStyle::crossed:
+    os << termcolor::crossed;
+    break;
+  default:
+    break;
+  }
+}
+
+inline std::ostream &write_duration(std::ostream &os, std::chrono::nanoseconds ns) {
+  using namespace std;
+  using namespace std::chrono;
+  using days = duration<int, ratio<86400>>;
+  char fill = os.fill();
+  os.fill('0');
+  auto d = duration_cast<days>(ns);
+  ns -= d;
+  auto h = duration_cast<hours>(ns);
+  ns -= h;
+  auto m = duration_cast<minutes>(ns);
+  ns -= m;
+  auto s = duration_cast<seconds>(ns);
+  if (d.count() > 0)
+    os << setw(2) << d.count() << "d:";
+  if (h.count() > 0)
+    os << setw(2) << h.count() << "h:";
+  os << setw(2) << m.count() << "m:" << setw(2) << s.count() << 's';
+  os.fill(fill);
+  return os;
+}
+
+class BlockProgressScaleWriter {
+public:
+  BlockProgressScaleWriter(std::ostream &os, size_t bar_width) : os(os), bar_width(bar_width) {}
+
+  std::ostream &write(float progress) {
+    std::string fill_text{"█"};
+    std::vector<std::string> lead_characters{" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"};
+    auto value = (std::min)(1.0f, (std::max)(0.0f, progress / 100.0f));
+    auto whole_width = std::floor(value * bar_width);
+    auto remainder_width = fmod((value * bar_width), 1.0f);
+    auto part_width = std::floor(remainder_width * lead_characters.size());
+    std::string lead_text = lead_characters[size_t(part_width)];
+    if ((bar_width - whole_width - 1) < 0)
+      lead_text = "";
+    for (size_t i = 0; i < whole_width; ++i)
+      os << fill_text;
+    os << lead_text;
+    for (size_t i = 0; i < (bar_width - whole_width - 1); ++i)
+      os << " ";
+    return os;
+  }
+
+private:
+  std::ostream &os;
+  size_t bar_width = 0;
+};
+
+class ProgressScaleWriter {
+public:
+  ProgressScaleWriter(std::ostream &os, size_t bar_width, const std::string &fill,
+                      const std::string &lead, const std::string &remainder)
+      : os(os), bar_width(bar_width), fill(fill), lead(lead), remainder(remainder) {}
+
+  std::ostream &write(float progress) {
+    auto pos = static_cast<size_t>(progress * bar_width / 100.0);
+    for (size_t i = 0, current_display_width = 0; i < bar_width;) {
+      std::string next;
+
+      if (i < pos) {
+        next = fill;
+        current_display_width = unicode::display_width(fill);
+      } else if (i == pos) {
+        next = lead;
+        current_display_width = unicode::display_width(lead);
+      } else {
+        next = remainder;
+        current_display_width = unicode::display_width(remainder);
+      }
+
+      i += current_display_width;
+
+      if (i > bar_width) {
+        // `next` is larger than the allowed bar width
+        // fill with empty space instead
+        os << std::string((bar_width - (i - current_display_width)), ' ');
+        break;
+      }
+
+      os << next;
+    }
+    return os;
+  }
+
+private:
+  std::ostream &os;
+  size_t bar_width = 0;
+  std::string fill;
+  std::string lead;
+  std::string remainder;
+};
+
+class IndeterminateProgressScaleWriter {
+public:
+  IndeterminateProgressScaleWriter(std::ostream &os, size_t bar_width, const std::string &fill,
+                                   const std::string &lead)
+      : os(os), bar_width(bar_width), fill(fill), lead(lead) {}
+
+  std::ostream &write(size_t progress) {
+    for (size_t i = 0; i < bar_width;) {
+      std::string next;
+      size_t current_display_width = 0;
+
+      if (i < progress) {
+        next = fill;
+        current_display_width = unicode::display_width(fill);
+      } else if (i == progress) {
+        next = lead;
+        current_display_width = unicode::display_width(lead);
+      } else {
+        next = fill;
+        current_display_width = unicode::display_width(fill);
+      }
+
+      i += current_display_width;
+
+      if (i > bar_width) {
+        // `next` is larger than the allowed bar width
+        // fill with empty space instead
+        os << std::string((bar_width - (i - current_display_width)), ' ');
+        break;
+      }
+
+      os << next;
+    }
+    return os;
+  }
+
+private:
+  std::ostream &os;
+  size_t bar_width = 0;
+  std::string fill;
+  std::string lead;
+};
+
+} // namespace details
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/display_width.hpp b/indicators/display_width.hpp
new file mode 100644
index 0000000..c937d2b
--- /dev/null
+++ b/indicators/display_width.hpp
@@ -0,0 +1,359 @@
+
+#ifndef INDICATORS_DISPLAY_WIDTH
+#define INDICATORS_DISPLAY_WIDTH
+
+#include <clocale>
+#include <cstdlib>
+#include <locale>
+#include <string>
+#include <wchar.h>
+
+namespace unicode {
+
+namespace details {
+
+/*
+ * This is an implementation of wcwidth() and wcswidth() (defined in
+ * IEEE Std 1002.1-2001) for Unicode.
+ *
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
+ *
+ * In fixed-width output devices, Latin characters all occupy a single
+ * "cell" position of equal width, whereas ideographic CJK characters
+ * occupy two such cells. Interoperability between terminal-line
+ * applications and (teletype-style) character terminals using the
+ * UTF-8 encoding requires agreement on which character should advance
+ * the cursor by how many cell positions. No established formal
+ * standards exist at present on which Unicode character shall occupy
+ * how many cell positions on character terminals. These routines are
+ * a first attempt of defining such behavior based on simple rules
+ * applied to data provided by the Unicode Consortium.
+ *
+ * For some graphical characters, the Unicode standard explicitly
+ * defines a character-cell width via the definition of the East Asian
+ * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
+ * In all these cases, there is no ambiguity about which width a
+ * terminal shall use. For characters in the East Asian Ambiguous (A)
+ * class, the width choice depends purely on a preference of backward
+ * compatibility with either historic CJK or Western practice.
+ * Choosing single-width for these characters is easy to justify as
+ * the appropriate long-term solution, as the CJK practice of
+ * displaying these characters as double-width comes from historic
+ * implementation simplicity (8-bit encoded characters were displayed
+ * single-width and 16-bit ones double-width, even for Greek,
+ * Cyrillic, etc.) and not any typographic considerations.
+ *
+ * Much less clear is the choice of width for the Not East Asian
+ * (Neutral) class. Existing practice does not dictate a width for any
+ * of these characters. It would nevertheless make sense
+ * typographically to allocate two character cells to characters such
+ * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
+ * represented adequately with a single-width glyph. The following
+ * routines at present merely assign a single-cell width to all
+ * neutral characters, in the interest of simplicity. This is not
+ * entirely satisfactory and should be reconsidered before
+ * establishing a formal standard in this area. At the moment, the
+ * decision which Not East Asian (Neutral) characters should be
+ * represented by double-width glyphs cannot yet be answered by
+ * applying a simple rule from the Unicode database content. Setting
+ * up a proper standard for the behavior of UTF-8 character terminals
+ * will require a careful analysis not only of each Unicode character,
+ * but also of each presentation form, something the author of these
+ * routines has avoided to do so far.
+ *
+ * http://www.unicode.org/unicode/reports/tr11/
+ *
+ * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * for any purpose and without fee is hereby granted. The author
+ * disclaims all warranties with regard to this software.
+ *
+ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+ */
+
+struct interval {
+  int first;
+  int last;
+};
+
+/* auxiliary function for binary search in interval table */
+static inline int bisearch(wchar_t ucs, const struct interval *table, int max) {
+  int min = 0;
+  int mid;
+
+  if (ucs < table[0].first || ucs > table[max].last)
+    return 0;
+  while (max >= min) {
+    mid = (min + max) / 2;
+    if (ucs > table[mid].last)
+      min = mid + 1;
+    else if (ucs < table[mid].first)
+      max = mid - 1;
+    else
+      return 1;
+  }
+
+  return 0;
+}
+
+/* The following two functions define the column width of an ISO 10646
+ * character as follows:
+ *
+ *    - The null character (U+0000) has a column width of 0.
+ *
+ *    - Other C0/C1 control characters and DEL will lead to a return
+ *      value of -1.
+ *
+ *    - Non-spacing and enclosing combining characters (general
+ *      category code Mn or Me in the Unicode database) have a
+ *      column width of 0.
+ *
+ *    - SOFT HYPHEN (U+00AD) has a column width of 1.
+ *
+ *    - Other format characters (general category code Cf in the Unicode
+ *      database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+ *
+ *    - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
+ *      have a column width of 0.
+ *
+ *    - Spacing characters in the East Asian Wide (W) or East Asian
+ *      Full-width (F) category as defined in Unicode Technical
+ *      Report #11 have a column width of 2.
+ *
+ *    - All remaining characters (including all printable
+ *      ISO 8859-1 and WGL4 characters, Unicode control characters,
+ *      etc.) have a column width of 1.
+ *
+ * This implementation assumes that wchar_t characters are encoded
+ * in ISO 10646.
+ */
+
+static inline int mk_wcwidth(wchar_t ucs) {
+  /* sorted list of non-overlapping intervals of non-spacing characters */
+  /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
+  static const struct interval combining[] = {
+      {0x0300, 0x036F},   {0x0483, 0x0486},   {0x0488, 0x0489},
+      {0x0591, 0x05BD},   {0x05BF, 0x05BF},   {0x05C1, 0x05C2},
+      {0x05C4, 0x05C5},   {0x05C7, 0x05C7},   {0x0600, 0x0603},
+      {0x0610, 0x0615},   {0x064B, 0x065E},   {0x0670, 0x0670},
+      {0x06D6, 0x06E4},   {0x06E7, 0x06E8},   {0x06EA, 0x06ED},
+      {0x070F, 0x070F},   {0x0711, 0x0711},   {0x0730, 0x074A},
+      {0x07A6, 0x07B0},   {0x07EB, 0x07F3},   {0x0901, 0x0902},
+      {0x093C, 0x093C},   {0x0941, 0x0948},   {0x094D, 0x094D},
+      {0x0951, 0x0954},   {0x0962, 0x0963},   {0x0981, 0x0981},
+      {0x09BC, 0x09BC},   {0x09C1, 0x09C4},   {0x09CD, 0x09CD},
+      {0x09E2, 0x09E3},   {0x0A01, 0x0A02},   {0x0A3C, 0x0A3C},
+      {0x0A41, 0x0A42},   {0x0A47, 0x0A48},   {0x0A4B, 0x0A4D},
+      {0x0A70, 0x0A71},   {0x0A81, 0x0A82},   {0x0ABC, 0x0ABC},
+      {0x0AC1, 0x0AC5},   {0x0AC7, 0x0AC8},   {0x0ACD, 0x0ACD},
+      {0x0AE2, 0x0AE3},   {0x0B01, 0x0B01},   {0x0B3C, 0x0B3C},
+      {0x0B3F, 0x0B3F},   {0x0B41, 0x0B43},   {0x0B4D, 0x0B4D},
+      {0x0B56, 0x0B56},   {0x0B82, 0x0B82},   {0x0BC0, 0x0BC0},
+      {0x0BCD, 0x0BCD},   {0x0C3E, 0x0C40},   {0x0C46, 0x0C48},
+      {0x0C4A, 0x0C4D},   {0x0C55, 0x0C56},   {0x0CBC, 0x0CBC},
+      {0x0CBF, 0x0CBF},   {0x0CC6, 0x0CC6},   {0x0CCC, 0x0CCD},
+      {0x0CE2, 0x0CE3},   {0x0D41, 0x0D43},   {0x0D4D, 0x0D4D},
+      {0x0DCA, 0x0DCA},   {0x0DD2, 0x0DD4},   {0x0DD6, 0x0DD6},
+      {0x0E31, 0x0E31},   {0x0E34, 0x0E3A},   {0x0E47, 0x0E4E},
+      {0x0EB1, 0x0EB1},   {0x0EB4, 0x0EB9},   {0x0EBB, 0x0EBC},
+      {0x0EC8, 0x0ECD},   {0x0F18, 0x0F19},   {0x0F35, 0x0F35},
+      {0x0F37, 0x0F37},   {0x0F39, 0x0F39},   {0x0F71, 0x0F7E},
+      {0x0F80, 0x0F84},   {0x0F86, 0x0F87},   {0x0F90, 0x0F97},
+      {0x0F99, 0x0FBC},   {0x0FC6, 0x0FC6},   {0x102D, 0x1030},
+      {0x1032, 0x1032},   {0x1036, 0x1037},   {0x1039, 0x1039},
+      {0x1058, 0x1059},   {0x1160, 0x11FF},   {0x135F, 0x135F},
+      {0x1712, 0x1714},   {0x1732, 0x1734},   {0x1752, 0x1753},
+      {0x1772, 0x1773},   {0x17B4, 0x17B5},   {0x17B7, 0x17BD},
+      {0x17C6, 0x17C6},   {0x17C9, 0x17D3},   {0x17DD, 0x17DD},
+      {0x180B, 0x180D},   {0x18A9, 0x18A9},   {0x1920, 0x1922},
+      {0x1927, 0x1928},   {0x1932, 0x1932},   {0x1939, 0x193B},
+      {0x1A17, 0x1A18},   {0x1B00, 0x1B03},   {0x1B34, 0x1B34},
+      {0x1B36, 0x1B3A},   {0x1B3C, 0x1B3C},   {0x1B42, 0x1B42},
+      {0x1B6B, 0x1B73},   {0x1DC0, 0x1DCA},   {0x1DFE, 0x1DFF},
+      {0x200B, 0x200F},   {0x202A, 0x202E},   {0x2060, 0x2063},
+      {0x206A, 0x206F},   {0x20D0, 0x20EF},   {0x302A, 0x302F},
+      {0x3099, 0x309A},   {0xA806, 0xA806},   {0xA80B, 0xA80B},
+      {0xA825, 0xA826},   {0xFB1E, 0xFB1E},   {0xFE00, 0xFE0F},
+      {0xFE20, 0xFE23},   {0xFEFF, 0xFEFF},   {0xFFF9, 0xFFFB},
+      {0x10A01, 0x10A03}, {0x10A05, 0x10A06}, {0x10A0C, 0x10A0F},
+      {0x10A38, 0x10A3A}, {0x10A3F, 0x10A3F}, {0x1D167, 0x1D169},
+      {0x1D173, 0x1D182}, {0x1D185, 0x1D18B}, {0x1D1AA, 0x1D1AD},
+      {0x1D242, 0x1D244}, {0xE0001, 0xE0001}, {0xE0020, 0xE007F},
+      {0xE0100, 0xE01EF}};
+
+  /* test for 8-bit control characters */
+  if (ucs == 0)
+    return 0;
+  if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
+    return -1;
+
+  /* binary search in table of non-spacing characters */
+  if (bisearch(ucs, combining, sizeof(combining) / sizeof(struct interval) - 1))
+    return 0;
+
+  /* if we arrive here, ucs is not a combining or C0/C1 control character */
+
+  return 1 +
+         (ucs >= 0x1100 &&
+          (ucs <= 0x115f || /* Hangul Jamo init. consonants */
+           ucs == 0x2329 || ucs == 0x232a ||
+           (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs != 0x303f) || /* CJK ... Yi */
+           (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */
+           (ucs >= 0xf900 &&
+            ucs <= 0xfaff) || /* CJK Compatibility Ideographs */
+           (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */
+           (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */
+           (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */
+           (ucs >= 0xffe0 && ucs <= 0xffe6) ||
+           (ucs >= 0x20000 && ucs <= 0x2fffd) ||
+           (ucs >= 0x30000 && ucs <= 0x3fffd)));
+}
+
+static inline int mk_wcswidth(const wchar_t *pwcs, size_t n) {
+  int w, width = 0;
+
+  for (; *pwcs && n-- > 0; pwcs++)
+    if ((w = mk_wcwidth(*pwcs)) < 0)
+      return -1;
+    else
+      width += w;
+
+  return width;
+}
+
+/*
+ * The following functions are the same as mk_wcwidth() and
+ * mk_wcswidth(), except that spacing characters in the East Asian
+ * Ambiguous (A) category as defined in Unicode Technical Report #11
+ * have a column width of 2. This variant might be useful for users of
+ * CJK legacy encodings who want to migrate to UCS without changing
+ * the traditional terminal character-width behaviour. It is not
+ * otherwise recommended for general use.
+ */
+static inline int mk_wcwidth_cjk(wchar_t ucs) {
+  /* sorted list of non-overlapping intervals of East Asian Ambiguous
+   * characters, generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c" */
+  static const struct interval ambiguous[] = {
+      {0x00A1, 0x00A1}, {0x00A4, 0x00A4},   {0x00A7, 0x00A8},
+      {0x00AA, 0x00AA}, {0x00AE, 0x00AE},   {0x00B0, 0x00B4},
+      {0x00B6, 0x00BA}, {0x00BC, 0x00BF},   {0x00C6, 0x00C6},
+      {0x00D0, 0x00D0}, {0x00D7, 0x00D8},   {0x00DE, 0x00E1},
+      {0x00E6, 0x00E6}, {0x00E8, 0x00EA},   {0x00EC, 0x00ED},
+      {0x00F0, 0x00F0}, {0x00F2, 0x00F3},   {0x00F7, 0x00FA},
+      {0x00FC, 0x00FC}, {0x00FE, 0x00FE},   {0x0101, 0x0101},
+      {0x0111, 0x0111}, {0x0113, 0x0113},   {0x011B, 0x011B},
+      {0x0126, 0x0127}, {0x012B, 0x012B},   {0x0131, 0x0133},
+      {0x0138, 0x0138}, {0x013F, 0x0142},   {0x0144, 0x0144},
+      {0x0148, 0x014B}, {0x014D, 0x014D},   {0x0152, 0x0153},
+      {0x0166, 0x0167}, {0x016B, 0x016B},   {0x01CE, 0x01CE},
+      {0x01D0, 0x01D0}, {0x01D2, 0x01D2},   {0x01D4, 0x01D4},
+      {0x01D6, 0x01D6}, {0x01D8, 0x01D8},   {0x01DA, 0x01DA},
+      {0x01DC, 0x01DC}, {0x0251, 0x0251},   {0x0261, 0x0261},
+      {0x02C4, 0x02C4}, {0x02C7, 0x02C7},   {0x02C9, 0x02CB},
+      {0x02CD, 0x02CD}, {0x02D0, 0x02D0},   {0x02D8, 0x02DB},
+      {0x02DD, 0x02DD}, {0x02DF, 0x02DF},   {0x0391, 0x03A1},
+      {0x03A3, 0x03A9}, {0x03B1, 0x03C1},   {0x03C3, 0x03C9},
+      {0x0401, 0x0401}, {0x0410, 0x044F},   {0x0451, 0x0451},
+      {0x2010, 0x2010}, {0x2013, 0x2016},   {0x2018, 0x2019},
+      {0x201C, 0x201D}, {0x2020, 0x2022},   {0x2024, 0x2027},
+      {0x2030, 0x2030}, {0x2032, 0x2033},   {0x2035, 0x2035},
+      {0x203B, 0x203B}, {0x203E, 0x203E},   {0x2074, 0x2074},
+      {0x207F, 0x207F}, {0x2081, 0x2084},   {0x20AC, 0x20AC},
+      {0x2103, 0x2103}, {0x2105, 0x2105},   {0x2109, 0x2109},
+      {0x2113, 0x2113}, {0x2116, 0x2116},   {0x2121, 0x2122},
+      {0x2126, 0x2126}, {0x212B, 0x212B},   {0x2153, 0x2154},
+      {0x215B, 0x215E}, {0x2160, 0x216B},   {0x2170, 0x2179},
+      {0x2190, 0x2199}, {0x21B8, 0x21B9},   {0x21D2, 0x21D2},
+      {0x21D4, 0x21D4}, {0x21E7, 0x21E7},   {0x2200, 0x2200},
+      {0x2202, 0x2203}, {0x2207, 0x2208},   {0x220B, 0x220B},
+      {0x220F, 0x220F}, {0x2211, 0x2211},   {0x2215, 0x2215},
+      {0x221A, 0x221A}, {0x221D, 0x2220},   {0x2223, 0x2223},
+      {0x2225, 0x2225}, {0x2227, 0x222C},   {0x222E, 0x222E},
+      {0x2234, 0x2237}, {0x223C, 0x223D},   {0x2248, 0x2248},
+      {0x224C, 0x224C}, {0x2252, 0x2252},   {0x2260, 0x2261},
+      {0x2264, 0x2267}, {0x226A, 0x226B},   {0x226E, 0x226F},
+      {0x2282, 0x2283}, {0x2286, 0x2287},   {0x2295, 0x2295},
+      {0x2299, 0x2299}, {0x22A5, 0x22A5},   {0x22BF, 0x22BF},
+      {0x2312, 0x2312}, {0x2460, 0x24E9},   {0x24EB, 0x254B},
+      {0x2550, 0x2573}, {0x2580, 0x258F},   {0x2592, 0x2595},
+      {0x25A0, 0x25A1}, {0x25A3, 0x25A9},   {0x25B2, 0x25B3},
+      {0x25B6, 0x25B7}, {0x25BC, 0x25BD},   {0x25C0, 0x25C1},
+      {0x25C6, 0x25C8}, {0x25CB, 0x25CB},   {0x25CE, 0x25D1},
+      {0x25E2, 0x25E5}, {0x25EF, 0x25EF},   {0x2605, 0x2606},
+      {0x2609, 0x2609}, {0x260E, 0x260F},   {0x2614, 0x2615},
+      {0x261C, 0x261C}, {0x261E, 0x261E},   {0x2640, 0x2640},
+      {0x2642, 0x2642}, {0x2660, 0x2661},   {0x2663, 0x2665},
+      {0x2667, 0x266A}, {0x266C, 0x266D},   {0x266F, 0x266F},
+      {0x273D, 0x273D}, {0x2776, 0x277F},   {0xE000, 0xF8FF},
+      {0xFFFD, 0xFFFD}, {0xF0000, 0xFFFFD}, {0x100000, 0x10FFFD}};
+
+  /* binary search in table of non-spacing characters */
+  if (bisearch(ucs, ambiguous, sizeof(ambiguous) / sizeof(struct interval) - 1))
+    return 2;
+
+  return mk_wcwidth(ucs);
+}
+
+static inline int mk_wcswidth_cjk(const wchar_t *pwcs, size_t n) {
+  int w, width = 0;
+
+  for (; *pwcs && n-- > 0; pwcs++)
+    if ((w = mk_wcwidth_cjk(*pwcs)) < 0)
+      return -1;
+    else
+      width += w;
+
+  return width;
+}
+
+// convert UTF-8 string to wstring
+#ifdef _MSC_VER
+static inline std::wstring utf8_decode(const std::string& s) {
+    auto r = setlocale(LC_ALL, "");
+    std::string curLocale;
+    if (r)
+      curLocale = r;
+    const char* _Source = s.c_str();
+    size_t _Dsize = std::strlen(_Source) + 1;
+    wchar_t* _Dest = new wchar_t[_Dsize];
+    size_t _Osize;
+    mbstowcs_s(&_Osize, _Dest, _Dsize, _Source, _Dsize);
+    std::wstring result = _Dest;
+    delete[] _Dest;
+    setlocale(LC_ALL, curLocale.c_str());
+    return result;
+}
+#else 
+static inline std::wstring utf8_decode(const std::string& s) {
+    auto r = setlocale(LC_ALL, "");
+    std::string curLocale;
+    if (r)
+      curLocale = r;
+    const char* _Source = s.c_str();
+    size_t _Dsize = mbstowcs(NULL, _Source, 0) + 1;
+    wchar_t* _Dest = new wchar_t[_Dsize];
+    wmemset(_Dest, 0, _Dsize);
+    mbstowcs(_Dest, _Source, _Dsize);
+    std::wstring result = _Dest;
+    delete[] _Dest;
+    setlocale(LC_ALL, curLocale.c_str());
+    return result;
+}
+#endif
+
+} // namespace details
+
+static inline int display_width(const std::string &input) {
+  using namespace unicode::details;
+  return mk_wcswidth(utf8_decode(input).c_str(), input.size());
+}
+
+static inline int display_width(const std::wstring &input) {
+  return details::mk_wcswidth(input.c_str(), input.size());
+}
+
+} // namespace unicode
+
+#endif
\ No newline at end of file
diff --git a/indicators/dynamic_progress.hpp b/indicators/dynamic_progress.hpp
new file mode 100644
index 0000000..49d7d89
--- /dev/null
+++ b/indicators/dynamic_progress.hpp
@@ -0,0 +1,122 @@
+
+#ifndef INDICATORS_DYNAMIC_PROGRESS
+#define INDICATORS_DYNAMIC_PROGRESS
+
+#include <atomic>
+#include <functional>
+#include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <indicators/cursor_control.hpp>
+#include <indicators/cursor_movement.hpp>
+#include <indicators/details/stream_helper.hpp>
+#include <iostream>
+#include <mutex>
+#include <vector>
+
+namespace indicators {
+
+template <typename Indicator> class DynamicProgress {
+  using Settings = std::tuple<option::HideBarWhenComplete>;
+
+public:
+  template <typename... Indicators> explicit DynamicProgress(Indicators &... bars) {
+    bars_ = {bars...};
+    for (auto &bar : bars_) {
+      bar.get().multi_progress_mode_ = true;
+      ++total_count_;
+      ++incomplete_count_;
+    }
+  }
+
+  Indicator &operator[](size_t index) {
+    print_progress();
+    std::lock_guard<std::mutex> lock{mutex_};
+    return bars_[index].get();
+  }
+
+  size_t push_back(Indicator &bar) {
+    std::lock_guard<std::mutex> lock{mutex_};
+    bar.multi_progress_mode_ = true;
+    bars_.push_back(bar);
+    return bars_.size() - 1;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id> &&setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = std::move(setting).value;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id> &setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = setting.value;
+  }
+
+private:
+  Settings settings_;
+  std::atomic<bool> started_{false};
+  std::mutex mutex_;
+  std::vector<std::reference_wrapper<Indicator>> bars_;
+  std::atomic<size_t> total_count_{0};
+  std::atomic<size_t> incomplete_count_{0};
+
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const
+      -> decltype((details::get_value<id>(std::declval<const Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+public:
+  void print_progress() {
+    std::lock_guard<std::mutex> lock{mutex_};
+    auto &hide_bar_when_complete = get_value<details::ProgressBarOption::hide_bar_when_complete>();
+    if (hide_bar_when_complete) {
+      // Hide completed bars
+      if (started_) {
+        for (size_t i = 0; i < incomplete_count_; ++i) {
+          move_up(1);
+          erase_line();
+          std::cout << std::flush;
+        }
+      }
+      incomplete_count_ = 0;
+      for (auto &bar : bars_) {
+        if (!bar.get().is_completed()) {
+          bar.get().print_progress(true);
+          std::cout << "\n";
+          ++incomplete_count_;
+        }
+      }
+      if (!started_)
+        started_ = true;
+    } else {
+      // Don't hide any bars
+      if (started_)
+        move_up(static_cast<int>(total_count_));
+      for (auto &bar : bars_) {
+        bar.get().print_progress(true);
+        std::cout << "\n";
+      }
+      if (!started_)
+        started_ = true;
+    }
+    total_count_ = bars_.size();
+    std::cout << termcolor::reset;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/font_style.hpp b/indicators/font_style.hpp
new file mode 100644
index 0000000..cb0b480
--- /dev/null
+++ b/indicators/font_style.hpp
@@ -0,0 +1,9 @@
+
+#ifndef INDICATORS_FONT_STYLE
+#define INDICATORS_FONT_STYLE
+
+namespace indicators {
+enum class FontStyle { bold, dark, italic, underline, blink, reverse, concealed, crossed };
+}
+
+#endif
diff --git a/indicators/indeterminate_progress_bar.hpp b/indicators/indeterminate_progress_bar.hpp
new file mode 100644
index 0000000..f77dd5a
--- /dev/null
+++ b/indicators/indeterminate_progress_bar.hpp
@@ -0,0 +1,239 @@
+
+#ifndef INDICATORS_INDETERMINATE_PROGRESS_BAR
+#define INDICATORS_INDETERMINATE_PROGRESS_BAR
+
+#include <indicators/details/stream_helper.hpp>
+
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <cmath>
+#include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <indicators/terminal_size.hpp>
+#include <iomanip>
+#include <iostream>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <tuple>
+#include <type_traits>
+#include <sstream>
+#include <utility>
+
+namespace indicators {
+
+class IndeterminateProgressBar {
+  using Settings =
+      std::tuple<option::BarWidth, option::PrefixText, option::PostfixText, option::Start,
+                 option::End, option::Fill, option::Lead, option::MaxPostfixTextLen,
+                 option::Completed, option::ForegroundColor, option::FontStyles, option::Stream>;
+
+  enum class Direction { forward, backward };
+
+  Direction direction_{Direction::forward};
+
+public:
+  template <typename... Args,
+            typename std::enable_if<details::are_settings_from_tuple<
+                                        Settings, typename std::decay<Args>::type...>::value,
+                                    void *>::type = nullptr>
+  explicit IndeterminateProgressBar(Args &&... args)
+      : settings_(details::get<details::ProgressBarOption::bar_width>(option::BarWidth{100},
+                                                                      std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::prefix_text>(
+                      option::PrefixText{}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::postfix_text>(
+                      option::PostfixText{}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::start>(option::Start{"["},
+                                                                  std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::end>(option::End{"]"},
+                                                                std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::fill>(option::Fill{"."},
+                                                                 std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::lead>(option::Lead{"<==>"},
+                                                                 std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::max_postfix_text_len>(
+                      option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::completed>(option::Completed{false},
+                                                                      std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::foreground_color>(
+                      option::ForegroundColor{Color::unspecified}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::font_styles>(
+                      option::FontStyles{std::vector<FontStyle>{}}, std::forward<Args>(args)...),
+                  details::get<details::ProgressBarOption::stream>(option::Stream{std::cout},
+                                                                   std::forward<Args>(args)...)) {
+    // starts with [<==>...........]
+    // progress_ = 0
+
+    // ends with   [...........<==>]
+    //             ^^^^^^^^^^^^^^^^^ bar_width
+    //             ^^^^^^^^^^^^ (bar_width - len(lead))
+    // progress_ = bar_width - len(lead)
+    progress_ = 0;
+    max_progress_ = get_value<details::ProgressBarOption::bar_width>() -
+                    get_value<details::ProgressBarOption::lead>().size() +
+                    get_value<details::ProgressBarOption::start>().size() +
+                    get_value<details::ProgressBarOption::end>().size();
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id> &&setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = std::move(setting).value;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id> &setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = setting.value;
+  }
+
+  void set_option(
+      const details::Setting<std::string, details::ProgressBarOption::postfix_text> &setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if (setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
+    }
+  }
+
+  void
+  set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text> &&setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto &new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if (new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
+  }
+
+  void tick() {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      if (get_value<details::ProgressBarOption::completed>())
+        return;
+
+      progress_ += (direction_ == Direction::forward) ? 1 : -1;
+      if (direction_ == Direction::forward && progress_ == max_progress_) {
+        // time to go back
+        direction_ = Direction::backward;
+      } else if (direction_ == Direction::backward && progress_ == 0) {
+        direction_ = Direction::forward;
+      }
+    }
+    print_progress();
+  }
+
+  bool is_completed() { return get_value<details::ProgressBarOption::completed>(); }
+
+  void mark_as_completed() {
+    get_value<details::ProgressBarOption::completed>() = true;
+    print_progress();
+  }
+
+private:
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const
+      -> decltype((details::get_value<id>(std::declval<const Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  size_t progress_{0};
+  size_t max_progress_;
+  Settings settings_;
+  std::chrono::nanoseconds elapsed_;
+  std::mutex mutex_;
+
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  template <typename Indicator> friend class DynamicProgress;
+  std::atomic<bool> multi_progress_mode_{false};
+
+  std::pair<std::string, int> get_prefix_text() {
+    std::stringstream os;
+    os << get_value<details::ProgressBarOption::prefix_text>();
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+  std::pair<std::string, int> get_postfix_text() {
+    std::stringstream os;
+    os << " " << get_value<details::ProgressBarOption::postfix_text>();
+
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+public:
+  void print_progress(bool from_multi_progress = false) {
+    std::lock_guard<std::mutex> lock{mutex_};
+
+    auto &os = get_value<details::ProgressBarOption::stream>();
+
+    if (multi_progress_mode_ && !from_multi_progress) {
+      return;
+    }
+    if (get_value<details::ProgressBarOption::foreground_color>() != Color::unspecified)
+      details::set_stream_color(os, get_value<details::ProgressBarOption::foreground_color>());
+
+    for (auto &style : get_value<details::ProgressBarOption::font_styles>())
+      details::set_font_style(os, style);
+
+    const auto prefix_pair = get_prefix_text();
+    const auto prefix_text = prefix_pair.first;
+    const auto prefix_length = prefix_pair.second;
+    os << "\r" << prefix_text;
+
+    os << get_value<details::ProgressBarOption::start>();
+
+    details::IndeterminateProgressScaleWriter writer{
+        os, get_value<details::ProgressBarOption::bar_width>(),
+        get_value<details::ProgressBarOption::fill>(),
+        get_value<details::ProgressBarOption::lead>()};
+    writer.write(progress_);
+
+    os << get_value<details::ProgressBarOption::end>();
+
+    const auto postfix_pair = get_postfix_text();
+    const auto postfix_text = postfix_pair.first;
+    const auto postfix_length = postfix_pair.second;
+    os << postfix_text;
+
+    // Get length of prefix text and postfix text
+    const auto start_length = get_value<details::ProgressBarOption::start>().size();
+    const auto bar_width = get_value<details::ProgressBarOption::bar_width>();
+    const auto end_length = get_value<details::ProgressBarOption::end>().size();
+    const auto terminal_width = terminal_size().second;
+    // prefix + bar_width + postfix should be <= terminal_width
+    const int remaining = terminal_width - (prefix_length + start_length + bar_width + end_length + postfix_length);
+    if (prefix_length == -1 || postfix_length == -1) {
+      os << "\r";
+    } else if (remaining > 0) {
+      os << std::string(remaining, ' ') << "\r";
+    } else if (remaining < 0) {
+      // Do nothing. Maybe in the future truncate postfix with ...
+    }
+    os.flush();
+
+    if (get_value<details::ProgressBarOption::completed>() &&
+        !from_multi_progress) // Don't std::endl if calling from MultiProgress
+      os << termcolor::reset << std::endl;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/multi_progress.hpp b/indicators/multi_progress.hpp
new file mode 100644
index 0000000..16a9dc4
--- /dev/null
+++ b/indicators/multi_progress.hpp
@@ -0,0 +1,82 @@
+
+#ifndef INDICATORS_MULTI_PROGRESS
+#define INDICATORS_MULTI_PROGRESS
+#include <atomic>
+#include <functional>
+#include <iostream>
+#include <mutex>
+#include <vector>
+
+#include <indicators/color.hpp>
+#include <indicators/cursor_movement.hpp>
+#include <indicators/details/stream_helper.hpp>
+
+namespace indicators {
+
+template <typename Indicator, size_t count> class MultiProgress {
+public:
+  template <typename... Indicators,
+            typename = typename std::enable_if<(sizeof...(Indicators) == count)>::type>
+  explicit MultiProgress(Indicators &... bars) {
+    bars_ = {bars...};
+    for (auto &bar : bars_) {
+      bar.get().multi_progress_mode_ = true;
+    }
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), void>::type set_progress(size_t value) {
+    if (!bars_[index].get().is_completed())
+      bars_[index].get().set_progress(value);
+    print_progress();
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), void>::type set_progress(float value) {
+    if (!bars_[index].get().is_completed())
+      bars_[index].get().set_progress(value);
+    print_progress();
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), void>::type tick() {
+    if (!bars_[index].get().is_completed())
+      bars_[index].get().tick();
+    print_progress();
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), bool>::type is_completed() const {
+    return bars_[index].get().is_completed();
+  }
+
+private:
+  std::atomic<bool> started_{false};
+  std::mutex mutex_;
+  std::vector<std::reference_wrapper<Indicator>> bars_;
+
+  bool _all_completed() {
+    bool result{true};
+    for (size_t i = 0; i < count; ++i)
+      result &= bars_[i].get().is_completed();
+    return result;
+  }
+
+public:
+  void print_progress() {
+    std::lock_guard<std::mutex> lock{mutex_};
+    if (started_)
+      move_up(count);
+    for (auto &bar : bars_) {
+      bar.get().print_progress(true);
+      std::cout << "\n";
+    }
+    std::cout << termcolor::reset;
+    if (!started_)
+      started_ = true;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/progress_bar.hpp b/indicators/progress_bar.hpp
new file mode 100644
index 0000000..ce22957
--- /dev/null
+++ b/indicators/progress_bar.hpp
@@ -0,0 +1,362 @@
+
+#ifndef INDICATORS_PROGRESS_BAR
+#define INDICATORS_PROGRESS_BAR
+
+#include <indicators/details/stream_helper.hpp>
+
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <cmath>
+#include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <indicators/terminal_size.hpp>
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+namespace indicators {
+
+class ProgressBar {
+  using Settings =
+      std::tuple<option::BarWidth, option::PrefixText, option::PostfixText,
+                 option::Start, option::End, option::Fill, option::Lead,
+                 option::Remainder, option::MaxPostfixTextLen,
+                 option::Completed, option::ShowPercentage,
+                 option::ShowElapsedTime, option::ShowRemainingTime,
+                 option::SavedStartTime, option::ForegroundColor,
+                 option::FontStyles, option::MinProgress, option::MaxProgress,
+                 option::ProgressType, option::Stream>;
+
+public:
+  template <typename... Args,
+            typename std::enable_if<
+                details::are_settings_from_tuple<
+                    Settings, typename std::decay<Args>::type...>::value,
+                void *>::type = nullptr>
+  explicit ProgressBar(Args &&... args)
+      : settings_(
+            details::get<details::ProgressBarOption::bar_width>(
+                option::BarWidth{100}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::prefix_text>(
+                option::PrefixText{}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::postfix_text>(
+                option::PostfixText{}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::start>(
+                option::Start{"["}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::end>(
+                option::End{"]"}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::fill>(
+                option::Fill{"="}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::lead>(
+                option::Lead{">"}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::remainder>(
+                option::Remainder{" "}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::max_postfix_text_len>(
+                option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::completed>(
+                option::Completed{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_percentage>(
+                option::ShowPercentage{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_elapsed_time>(
+                option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_remaining_time>(
+                option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::saved_start_time>(
+                option::SavedStartTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::foreground_color>(
+                option::ForegroundColor{Color::unspecified},
+                std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::font_styles>(
+                option::FontStyles{std::vector<FontStyle>{}},
+                std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::min_progress>(
+                option::MinProgress{0}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::max_progress>(
+                option::MaxProgress{100}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::progress_type>(
+                option::ProgressType{ProgressType::incremental},
+                std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::stream>(
+                option::Stream{std::cout}, std::forward<Args>(args)...)) {
+
+    // if progress is incremental, start from min_progress
+    // else start from max_progress
+    const auto type = get_value<details::ProgressBarOption::progress_type>();
+    if (type == ProgressType::incremental)
+      progress_ = get_value<details::ProgressBarOption::min_progress>();
+    else
+      progress_ = get_value<details::ProgressBarOption::max_progress>();
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id> &&setting) {
+    static_assert(
+        !std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                             std::declval<Settings>()))>::type>::value,
+        "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = std::move(setting).value;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id> &setting) {
+    static_assert(
+        !std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                             std::declval<Settings>()))>::type>::value,
+        "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = setting.value;
+  }
+
+  void
+  set_option(const details::Setting<
+             std::string, details::ProgressBarOption::postfix_text> &setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if (setting.value.length() >
+        get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() =
+          setting.value.length();
+    }
+  }
+
+  void set_option(
+      details::Setting<std::string, details::ProgressBarOption::postfix_text>
+          &&setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() =
+        std::move(setting).value;
+    auto &new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if (new_value.length() >
+        get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() =
+          new_value.length();
+    }
+  }
+
+  void set_progress(size_t new_progress) {
+    {
+      std::lock_guard<std::mutex> lock(mutex_);
+      progress_ = new_progress;
+    }
+
+    save_start_time();
+    print_progress();
+  }
+
+  void tick() {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      const auto type = get_value<details::ProgressBarOption::progress_type>();
+      if (type == ProgressType::incremental)
+        progress_ += 1;
+      else
+        progress_ -= 1;
+    }
+    save_start_time();
+    print_progress();
+  }
+
+  size_t current() {
+    std::lock_guard<std::mutex> lock{mutex_};
+    return (std::min)(
+        progress_,
+        size_t(get_value<details::ProgressBarOption::max_progress>()));
+  }
+
+  bool is_completed() const {
+    return get_value<details::ProgressBarOption::completed>();
+  }
+
+  void mark_as_completed() {
+    get_value<details::ProgressBarOption::completed>() = true;
+    print_progress();
+  }
+
+private:
+  template <details::ProgressBarOption id>
+  auto get_value()
+      -> decltype((details::get_value<id>(std::declval<Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const -> decltype(
+      (details::get_value<id>(std::declval<const Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  size_t progress_{0};
+  Settings settings_;
+  std::chrono::nanoseconds elapsed_;
+  std::chrono::time_point<std::chrono::high_resolution_clock> start_time_point_;
+  std::mutex mutex_;
+
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  template <typename Indicator> friend class DynamicProgress;
+  std::atomic<bool> multi_progress_mode_{false};
+
+  void save_start_time() {
+    auto &show_elapsed_time =
+        get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto &saved_start_time =
+        get_value<details::ProgressBarOption::saved_start_time>();
+    auto &show_remaining_time =
+        get_value<details::ProgressBarOption::show_remaining_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      start_time_point_ = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
+    }
+  }
+
+  std::pair<std::string, int> get_prefix_text() {
+    std::stringstream os;
+    os << get_value<details::ProgressBarOption::prefix_text>();
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+  std::pair<std::string, int> get_postfix_text() {
+    std::stringstream os;
+    const auto max_progress =
+        get_value<details::ProgressBarOption::max_progress>();
+
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
+      os << " "
+         << (std::min)(static_cast<size_t>(static_cast<float>(progress_) /
+                                         max_progress * 100),
+                     size_t(100))
+         << "%";
+    }
+
+    auto &saved_start_time =
+        get_value<details::ProgressBarOption::saved_start_time>();
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      os << " [";
+      if (saved_start_time)
+        details::write_duration(os, elapsed_);
+      else
+        os << "00:00s";
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "<";
+      else
+        os << " [";
+
+      if (saved_start_time) {
+        auto eta = std::chrono::nanoseconds(
+            progress_ > 0
+                ? static_cast<long long>(std::ceil(float(elapsed_.count()) *
+                                                   max_progress / progress_))
+                : 0);
+        auto remaining = eta > elapsed_ ? (eta - elapsed_) : (elapsed_ - eta);
+        details::write_duration(os, remaining);
+      } else {
+        os << "00:00s";
+      }
+
+      os << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "]";
+    }
+
+    os << " " << get_value<details::ProgressBarOption::postfix_text>();
+
+    const auto result = os.str();
+    const auto result_size = unicode::display_width(result);
+    return {result, result_size};
+  }
+
+public:
+  void print_progress(bool from_multi_progress = false) {
+    std::lock_guard<std::mutex> lock{mutex_};
+
+    auto &os = get_value<details::ProgressBarOption::stream>();
+
+    const auto type = get_value<details::ProgressBarOption::progress_type>();
+    const auto min_progress =
+        get_value<details::ProgressBarOption::min_progress>();
+    const auto max_progress =
+        get_value<details::ProgressBarOption::max_progress>();
+    if (multi_progress_mode_ && !from_multi_progress) {
+      if ((type == ProgressType::incremental && progress_ >= max_progress) ||
+          (type == ProgressType::decremental && progress_ <= min_progress)) {
+        get_value<details::ProgressBarOption::completed>() = true;
+      }
+      return;
+    }
+    auto now = std::chrono::high_resolution_clock::now();
+    if (!get_value<details::ProgressBarOption::completed>())
+      elapsed_ = std::chrono::duration_cast<std::chrono::nanoseconds>(
+          now - start_time_point_);
+
+    if (get_value<details::ProgressBarOption::foreground_color>() !=
+        Color::unspecified)
+      details::set_stream_color(
+          os, get_value<details::ProgressBarOption::foreground_color>());
+
+    for (auto &style : get_value<details::ProgressBarOption::font_styles>())
+      details::set_font_style(os, style);
+
+    const auto prefix_pair = get_prefix_text();
+    const auto prefix_text = prefix_pair.first;
+    const auto prefix_length = prefix_pair.second;
+    os << "\r" << prefix_text;
+
+    os << get_value<details::ProgressBarOption::start>();
+
+    details::ProgressScaleWriter writer{
+        os, get_value<details::ProgressBarOption::bar_width>(),
+        get_value<details::ProgressBarOption::fill>(),
+        get_value<details::ProgressBarOption::lead>(),
+        get_value<details::ProgressBarOption::remainder>()};
+    writer.write(double(progress_) / double(max_progress) * 100.0f);
+
+    os << get_value<details::ProgressBarOption::end>();
+
+    const auto postfix_pair = get_postfix_text();
+    const auto postfix_text = postfix_pair.first;
+    const auto postfix_length = postfix_pair.second;
+    os << postfix_text;
+
+    // Get length of prefix text and postfix text
+    const auto start_length = get_value<details::ProgressBarOption::start>().size();
+    const auto bar_width = get_value<details::ProgressBarOption::bar_width>();
+    const auto end_length = get_value<details::ProgressBarOption::end>().size();
+    const auto terminal_width = terminal_size().second;
+    // prefix + bar_width + postfix should be <= terminal_width
+    const int remaining = terminal_width - (prefix_length + start_length + bar_width + end_length + postfix_length);
+    if (prefix_length == -1 || postfix_length == -1) {
+      os << "\r";
+    } else if (remaining > 0) {
+      os << std::string(remaining, ' ') << "\r";
+    } else if (remaining < 0) {
+      // Do nothing. Maybe in the future truncate postfix with ...
+    }
+    os.flush();
+
+    if ((type == ProgressType::incremental && progress_ >= max_progress) ||
+        (type == ProgressType::decremental && progress_ <= min_progress)) {
+      get_value<details::ProgressBarOption::completed>() = true;
+    }
+    if (get_value<details::ProgressBarOption::completed>() &&
+        !from_multi_progress) // Don't std::endl if calling from MultiProgress
+      os << termcolor::reset << std::endl;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/progress_spinner.hpp b/indicators/progress_spinner.hpp
new file mode 100644
index 0000000..62d5b14
--- /dev/null
+++ b/indicators/progress_spinner.hpp
@@ -0,0 +1,227 @@
+
+#ifndef INDICATORS_PROGRESS_SPINNER
+#define INDICATORS_PROGRESS_SPINNER
+
+#include <indicators/details/stream_helper.hpp>
+
+#include <algorithm>
+#include <atomic>
+#include <chrono>
+#include <cmath>
+#include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <iomanip>
+#include <iostream>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <tuple>
+#include <vector>
+
+namespace indicators {
+
+class ProgressSpinner {
+  using Settings =
+      std::tuple<option::ForegroundColor, option::PrefixText, option::PostfixText,
+                 option::ShowPercentage, option::ShowElapsedTime, option::ShowRemainingTime,
+                 option::ShowSpinner, option::SavedStartTime, option::Completed,
+                 option::MaxPostfixTextLen, option::SpinnerStates, option::FontStyles,
+                 option::MaxProgress, option::Stream>;
+
+public:
+  template <typename... Args,
+            typename std::enable_if<details::are_settings_from_tuple<
+                                        Settings, typename std::decay<Args>::type...>::value,
+                                    void *>::type = nullptr>
+  explicit ProgressSpinner(Args &&... args)
+      : settings_(
+            details::get<details::ProgressBarOption::foreground_color>(
+                option::ForegroundColor{Color::unspecified}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::prefix_text>(option::PrefixText{},
+                                                                  std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::postfix_text>(option::PostfixText{},
+                                                                   std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_percentage>(option::ShowPercentage{true},
+                                                                      std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_elapsed_time>(
+                option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::show_remaining_time>(
+                option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::spinner_show>(option::ShowSpinner{true},
+                                                                   std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::saved_start_time>(
+                option::SavedStartTime{false}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::completed>(option::Completed{false},
+                                                                std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::max_postfix_text_len>(
+                option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::spinner_states>(
+                option::SpinnerStates{
+                    std::vector<std::string>{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}},
+                std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::font_styles>(
+                option::FontStyles{std::vector<FontStyle>{}}, std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::max_progress>(option::MaxProgress{100},
+                                                                   std::forward<Args>(args)...),
+            details::get<details::ProgressBarOption::stream>(option::Stream{std::cout},
+                                                             std::forward<Args>(args)...)) {}
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id> &&setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = std::move(setting).value;
+  }
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id> &setting) {
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(
+                                       std::declval<Settings>()))>::type>::value,
+                  "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<id>() = setting.value;
+  }
+
+  void set_option(
+      const details::Setting<std::string, details::ProgressBarOption::postfix_text> &setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if (setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
+    }
+  }
+
+  void
+  set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text> &&setting) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto &new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if (new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()) {
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
+  }
+
+  void set_progress(size_t value) {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      progress_ = value;
+    }
+    save_start_time();
+    print_progress();
+  }
+
+  void tick() {
+    {
+      std::lock_guard<std::mutex> lock{mutex_};
+      progress_ += 1;
+    }
+    save_start_time();
+    print_progress();
+  }
+
+  size_t current() {
+    std::lock_guard<std::mutex> lock{mutex_};
+    return (std::min)(progress_, size_t(get_value<details::ProgressBarOption::max_progress>()));
+  }
+
+  bool is_completed() const { return get_value<details::ProgressBarOption::completed>(); }
+
+  void mark_as_completed() {
+    get_value<details::ProgressBarOption::completed>() = true;
+    print_progress();
+  }
+
+private:
+  Settings settings_;
+  size_t progress_{0};
+  size_t index_{0};
+  std::chrono::time_point<std::chrono::high_resolution_clock> start_time_point_;
+  std::mutex mutex_;
+
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const
+      -> decltype((details::get_value<id>(std::declval<const Settings &>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  void save_start_time() {
+    auto &show_elapsed_time = get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto &show_remaining_time = get_value<details::ProgressBarOption::show_remaining_time>();
+    auto &saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      start_time_point_ = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
+    }
+  }
+
+public:
+  void print_progress() {
+    std::lock_guard<std::mutex> lock{mutex_};
+
+    auto &os = get_value<details::ProgressBarOption::stream>();
+
+    const auto max_progress = get_value<details::ProgressBarOption::max_progress>();
+    auto now = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(now - start_time_point_);
+
+    if (get_value<details::ProgressBarOption::foreground_color>() != Color::unspecified)
+      details::set_stream_color(os, get_value<details::ProgressBarOption::foreground_color>());
+
+    for (auto &style : get_value<details::ProgressBarOption::font_styles>())
+      details::set_font_style(os, style);
+
+    os << get_value<details::ProgressBarOption::prefix_text>();
+    if (get_value<details::ProgressBarOption::spinner_show>())
+      os << get_value<details::ProgressBarOption::spinner_states>()
+              [index_ % get_value<details::ProgressBarOption::spinner_states>().size()];
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
+      os << " " << std::size_t(progress_ / double(max_progress) * 100) << "%";
+    }
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      os << " [";
+      details::write_duration(os, elapsed);
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "<";
+      else
+        os << " [";
+      auto eta = std::chrono::nanoseconds(
+          progress_ > 0
+              ? static_cast<long long>(std::ceil(float(elapsed.count()) *
+                                                 max_progress / progress_))
+              : 0);
+      auto remaining = eta > elapsed ? (eta - elapsed) : (elapsed - eta);
+      details::write_duration(os, remaining);
+      os << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        os << "]";
+    }
+
+    if (get_value<details::ProgressBarOption::max_postfix_text_len>() == 0)
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = 10;
+    os << " " << get_value<details::ProgressBarOption::postfix_text>()
+       << std::string(get_value<details::ProgressBarOption::max_postfix_text_len>(), ' ') << "\r";
+    os.flush();
+    index_ += 1;
+    if (progress_ > max_progress) {
+      get_value<details::ProgressBarOption::completed>() = true;
+    }
+    if (get_value<details::ProgressBarOption::completed>())
+      os << termcolor::reset << std::endl;
+  }
+};
+
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/progress_type.hpp b/indicators/progress_type.hpp
new file mode 100644
index 0000000..54da1e8
--- /dev/null
+++ b/indicators/progress_type.hpp
@@ -0,0 +1,9 @@
+
+#ifndef INDICATORS_PROGRESS_TYPE
+#define INDICATORS_PROGRESS_TYPE
+
+namespace indicators {
+enum class ProgressType { incremental, decremental };
+}
+
+#endif
\ No newline at end of file
diff --git a/indicators/setting.hpp b/indicators/setting.hpp
new file mode 100644
index 0000000..7298258
--- /dev/null
+++ b/indicators/setting.hpp
@@ -0,0 +1,222 @@
+
+/*
+Activity Indicators for Modern C++
+https://github.com/p-ranav/indicators
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2019 Dawid Pilarski <dawid.pilarski@panicsoftware.com>.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#ifndef INDICATORS_SETTING
+#define INDICATORS_SETTING
+
+#include <cstddef>
+#include <indicators/color.hpp>
+#include <indicators/font_style.hpp>
+#include <indicators/progress_type.hpp>
+#include <string>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+namespace indicators {
+
+namespace details {
+
+template <bool condition> struct if_else;
+
+template <> struct if_else<true> { using type = std::true_type; };
+
+template <> struct if_else<false> { using type = std::false_type; };
+
+template <bool condition, typename True, typename False> struct if_else_type;
+
+template <typename True, typename False> struct if_else_type<true, True, False> {
+  using type = True;
+};
+
+template <typename True, typename False> struct if_else_type<false, True, False> {
+  using type = False;
+};
+
+template <typename... Ops> struct conjuction;
+
+template <> struct conjuction<> : std::true_type {};
+
+template <typename Op, typename... TailOps>
+struct conjuction<Op, TailOps...>
+    : if_else_type<!Op::value, std::false_type, conjuction<TailOps...>>::type {};
+
+template <typename... Ops> struct disjunction;
+
+template <> struct disjunction<> : std::false_type {};
+
+template <typename Op, typename... TailOps>
+struct disjunction<Op, TailOps...>
+    : if_else_type<Op::value, std::true_type, disjunction<TailOps...>>::type {};
+
+enum class ProgressBarOption {
+  bar_width = 0,
+  prefix_text,
+  postfix_text,
+  start,
+  end,
+  fill,
+  lead,
+  remainder,
+  max_postfix_text_len,
+  completed,
+  show_percentage,
+  show_elapsed_time,
+  show_remaining_time,
+  saved_start_time,
+  foreground_color,
+  spinner_show,
+  spinner_states,
+  font_styles,
+  hide_bar_when_complete,
+  min_progress,
+  max_progress,
+  progress_type,
+  stream
+};
+
+template <typename T, ProgressBarOption Id> struct Setting {
+  template <typename... Args,
+            typename = typename std::enable_if<std::is_constructible<T, Args...>::value>::type>
+  explicit Setting(Args &&... args) : value(std::forward<Args>(args)...) {}
+  Setting(const Setting &) = default;
+  Setting(Setting &&) = default;
+
+  static constexpr auto id = Id;
+  using type = T;
+
+  T value{};
+};
+
+template <typename T> struct is_setting : std::false_type {};
+
+template <ProgressBarOption Id, typename T> struct is_setting<Setting<T, Id>> : std::true_type {};
+
+template <typename... Args>
+struct are_settings : if_else<conjuction<is_setting<Args>...>::value>::type {};
+
+template <> struct are_settings<> : std::true_type {};
+
+template <typename Setting, typename Tuple> struct is_setting_from_tuple;
+
+template <typename Setting> struct is_setting_from_tuple<Setting, std::tuple<>> : std::true_type {};
+
+template <typename Setting, typename... TupleTypes>
+struct is_setting_from_tuple<Setting, std::tuple<TupleTypes...>>
+    : if_else<disjunction<std::is_same<Setting, TupleTypes>...>::value>::type {};
+
+template <typename Tuple, typename... Settings>
+struct are_settings_from_tuple
+    : if_else<conjuction<is_setting_from_tuple<Settings, Tuple>...>::value>::type {};
+
+template <ProgressBarOption Id> struct always_true { static constexpr auto value = true; };
+
+template <ProgressBarOption Id, typename Default> Default &&get_impl(Default &&def) {
+  return std::forward<Default>(def);
+}
+
+template <ProgressBarOption Id, typename Default, typename T, typename... Args>
+auto get_impl(Default && /*def*/, T &&first, Args &&... /*tail*/) ->
+    typename std::enable_if<(std::decay<T>::type::id == Id),
+                            decltype(std::forward<T>(first))>::type {
+  return std::forward<T>(first);
+}
+
+template <ProgressBarOption Id, typename Default, typename T, typename... Args>
+auto get_impl(Default &&def, T && /*first*/, Args &&... tail) ->
+    typename std::enable_if<(std::decay<T>::type::id != Id),
+                            decltype(get_impl<Id>(std::forward<Default>(def),
+                                                  std::forward<Args>(tail)...))>::type {
+  return get_impl<Id>(std::forward<Default>(def), std::forward<Args>(tail)...);
+}
+
+template <ProgressBarOption Id, typename Default, typename... Args,
+          typename = typename std::enable_if<are_settings<Args...>::value, void>::type>
+auto get(Default &&def, Args &&... args)
+    -> decltype(details::get_impl<Id>(std::forward<Default>(def), std::forward<Args>(args)...)) {
+  return details::get_impl<Id>(std::forward<Default>(def), std::forward<Args>(args)...);
+}
+
+template <ProgressBarOption Id> using StringSetting = Setting<std::string, Id>;
+
+template <ProgressBarOption Id> using IntegerSetting = Setting<std::size_t, Id>;
+
+template <ProgressBarOption Id> using BooleanSetting = Setting<bool, Id>;
+
+template <ProgressBarOption Id, typename Tuple, std::size_t counter = 0> struct option_idx;
+
+template <ProgressBarOption Id, typename T, typename... Settings, std::size_t counter>
+struct option_idx<Id, std::tuple<T, Settings...>, counter>
+    : if_else_type<(Id == T::id), std::integral_constant<std::size_t, counter>,
+                   option_idx<Id, std::tuple<Settings...>, counter + 1>>::type {};
+
+template <ProgressBarOption Id, std::size_t counter> struct option_idx<Id, std::tuple<>, counter> {
+  static_assert(always_true<(ProgressBarOption)Id>::value, "No such option was found");
+};
+
+template <ProgressBarOption Id, typename Settings>
+auto get_value(Settings &&settings)
+    -> decltype((std::get<option_idx<Id, typename std::decay<Settings>::type>::value>(
+        std::declval<Settings &&>()))) {
+  return std::get<option_idx<Id, typename std::decay<Settings>::type>::value>(
+      std::forward<Settings>(settings));
+}
+
+} // namespace details
+
+namespace option {
+using BarWidth = details::IntegerSetting<details::ProgressBarOption::bar_width>;
+using PrefixText = details::StringSetting<details::ProgressBarOption::prefix_text>;
+using PostfixText = details::StringSetting<details::ProgressBarOption::postfix_text>;
+using Start = details::StringSetting<details::ProgressBarOption::start>;
+using End = details::StringSetting<details::ProgressBarOption::end>;
+using Fill = details::StringSetting<details::ProgressBarOption::fill>;
+using Lead = details::StringSetting<details::ProgressBarOption::lead>;
+using Remainder = details::StringSetting<details::ProgressBarOption::remainder>;
+using MaxPostfixTextLen = details::IntegerSetting<details::ProgressBarOption::max_postfix_text_len>;
+using Completed = details::BooleanSetting<details::ProgressBarOption::completed>;
+using ShowPercentage = details::BooleanSetting<details::ProgressBarOption::show_percentage>;
+using ShowElapsedTime = details::BooleanSetting<details::ProgressBarOption::show_elapsed_time>;
+using ShowRemainingTime = details::BooleanSetting<details::ProgressBarOption::show_remaining_time>;
+using SavedStartTime = details::BooleanSetting<details::ProgressBarOption::saved_start_time>;
+using ForegroundColor = details::Setting<Color, details::ProgressBarOption::foreground_color>;
+using ShowSpinner = details::BooleanSetting<details::ProgressBarOption::spinner_show>;
+using SpinnerStates =
+    details::Setting<std::vector<std::string>, details::ProgressBarOption::spinner_states>;
+using HideBarWhenComplete =
+    details::BooleanSetting<details::ProgressBarOption::hide_bar_when_complete>;
+using FontStyles =
+    details::Setting<std::vector<FontStyle>, details::ProgressBarOption::font_styles>;
+using MinProgress = details::IntegerSetting<details::ProgressBarOption::min_progress>;
+using MaxProgress = details::IntegerSetting<details::ProgressBarOption::max_progress>;
+using ProgressType = details::Setting<ProgressType, details::ProgressBarOption::progress_type>;
+using Stream = details::Setting<std::ostream &, details::ProgressBarOption::stream>;
+} // namespace option
+} // namespace indicators
+
+#endif
\ No newline at end of file
diff --git a/indicators/termcolor.hpp b/indicators/termcolor.hpp
new file mode 100644
index 0000000..1a5a813
--- /dev/null
+++ b/indicators/termcolor.hpp
@@ -0,0 +1,917 @@
+//!
+//! termcolor
+//! ~~~~~~~~~
+//!
+//! termcolor is a header-only c++ library for printing colored messages
+//! to the terminal. Written just for fun with a help of the Force.
+//!
+//! :copyright: (c) 2013 by Ihor Kalnytskyi
+//! :license: BSD, see LICENSE for details
+//!
+
+#ifndef TERMCOLOR_HPP_
+#define TERMCOLOR_HPP_
+
+#include <iostream>
+#include <cstdio>
+#include <cstdint>
+
+// Detect target's platform and set some macros in order to wrap platform
+// specific code this library depends on.
+#if defined(_WIN32) || defined(_WIN64)
+#   define TERMCOLOR_TARGET_WINDOWS
+#elif defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))
+#   define TERMCOLOR_TARGET_POSIX
+#endif
+
+// If implementation has not been explicitly set, try to choose one based on
+// target platform.
+#if !defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES) && !defined(TERMCOLOR_USE_WINDOWS_API) && !defined(TERMCOLOR_USE_NOOP)
+#   if defined(TERMCOLOR_TARGET_POSIX)
+#       define TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES
+#       define TERMCOLOR_AUTODETECTED_IMPLEMENTATION
+#   elif defined(TERMCOLOR_TARGET_WINDOWS)
+#       define TERMCOLOR_USE_WINDOWS_API
+#       define TERMCOLOR_AUTODETECTED_IMPLEMENTATION
+#   endif
+#endif
+
+// These headers provide isatty()/fileno() functions, which are used for
+// testing whether a standard stream refers to the terminal.
+#if defined(TERMCOLOR_TARGET_POSIX)
+#   include <unistd.h>
+#elif defined(TERMCOLOR_TARGET_WINDOWS)
+#if defined(_MSC_VER)
+#if !defined(NOMINMAX)
+#define NOMINMAX
+#endif
+#endif
+#   include <io.h>
+#   include <windows.h>
+#endif
+
+
+namespace termcolor
+{
+    // Forward declaration of the `_internal` namespace.
+    // All comments are below.
+    namespace _internal
+    {
+        inline int colorize_index();
+        inline FILE* get_standard_stream(const std::ostream& stream);
+        inline bool is_colorized(std::ostream& stream);
+        inline bool is_atty(const std::ostream& stream);
+
+    #if defined(TERMCOLOR_TARGET_WINDOWS)
+        inline void win_change_attributes(std::ostream& stream, int foreground, int background=-1);
+    #endif
+    }
+
+    inline
+    std::ostream& colorize(std::ostream& stream)
+    {
+        stream.iword(_internal::colorize_index()) = 1L;
+        return stream;
+    }
+
+    inline
+    std::ostream& nocolorize(std::ostream& stream)
+    {
+        stream.iword(_internal::colorize_index()) = 0L;
+        return stream;
+    }
+
+    inline
+    std::ostream& reset(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[00m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1, -1);
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bold(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[1m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& dark(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[2m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& italic(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[3m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& underline(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[4m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1, COMMON_LVB_UNDERSCORE);
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& blink(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[5m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& reverse(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[7m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& concealed(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[8m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& crossed(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[9m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    template <uint8_t code> inline
+    std::ostream& color(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            char command[12];
+            std::snprintf(command, sizeof(command), "\033[38;5;%dm", code);
+            stream << command;
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    template <uint8_t code> inline
+    std::ostream& on_color(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            char command[12];
+            std::snprintf(command, sizeof(command), "\033[48;5;%dm", code);
+            stream << command;
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    template <uint8_t r, uint8_t g, uint8_t b> inline
+    std::ostream& color(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            char command[20];
+            std::snprintf(command, sizeof(command), "\033[38;2;%d;%d;%dm", r, g, b);
+            stream << command;
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    template <uint8_t r, uint8_t g, uint8_t b> inline
+    std::ostream& on_color(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            char command[20];
+            std::snprintf(command, sizeof(command), "\033[48;2;%d;%d;%dm", r, g, b);
+            stream << command;
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& grey(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[30m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                0   // grey (black)
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& red(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[31m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& green(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[32m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_GREEN
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& yellow(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[33m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_GREEN | FOREGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& blue(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[34m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& magenta(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[35m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& cyan(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[36m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_GREEN
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& white(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[37m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+
+    inline
+    std::ostream& bright_grey(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[90m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                0 | FOREGROUND_INTENSITY   // grey (black)
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_red(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[91m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_RED | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_green(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[92m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_GREEN | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_yellow(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[93m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_blue(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[94m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_magenta(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[95m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_RED | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_cyan(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[96m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& bright_white(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[97m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream,
+                FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+
+    inline
+    std::ostream& on_grey(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[40m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                0   // grey (black)
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_red(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[41m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_green(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[42m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_yellow(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[43m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_blue(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[44m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_BLUE
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_magenta(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[45m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_BLUE | BACKGROUND_RED
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_cyan(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[46m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_BLUE
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_white(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[47m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_RED
+            );
+        #endif
+        }
+
+        return stream;
+    }
+
+
+    inline
+    std::ostream& on_bright_grey(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[100m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                0 | BACKGROUND_INTENSITY   // grey (black)
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_red(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[101m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_RED | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_green(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[102m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_yellow(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[103m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_blue(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[104m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_BLUE | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_magenta(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[105m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_BLUE | BACKGROUND_RED | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_cyan(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[106m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+        return stream;
+    }
+
+    inline
+    std::ostream& on_bright_white(std::ostream& stream)
+    {
+        if (_internal::is_colorized(stream))
+        {
+        #if defined(TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES)
+            stream << "\033[107m";
+        #elif defined(TERMCOLOR_USE_WINDOWS_API)
+            _internal::win_change_attributes(stream, -1,
+                BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_RED | BACKGROUND_INTENSITY
+            );
+        #endif
+        }
+
+        return stream;
+    }
+
+
+
+    //! Since C++ hasn't a way to hide something in the header from
+    //! the outer access, I have to introduce this namespace which
+    //! is used for internal purpose and should't be access from
+    //! the user code.
+    namespace _internal
+    {
+        // An index to be used to access a private storage of I/O streams. See
+        // colorize / nocolorize I/O manipulators for details. Due to the fact
+        // that static variables ain't shared between translation units, inline
+        // function with local static variable is used to do the trick and share
+        // the variable value between translation units.
+        inline int colorize_index()
+        {
+            static int colorize_index = std::ios_base::xalloc();
+            return colorize_index;
+        }
+
+        //! Since C++ hasn't a true way to extract stream handler
+        //! from the a given `std::ostream` object, I have to write
+        //! this kind of hack.
+        inline
+        FILE* get_standard_stream(const std::ostream& stream)
+        {
+            if (&stream == &std::cout)
+                return stdout;
+            else if ((&stream == &std::cerr) || (&stream == &std::clog))
+                return stderr;
+
+            return nullptr;
+        }
+
+        // Say whether a given stream should be colorized or not. It's always
+        // true for ATTY streams and may be true for streams marked with
+        // colorize flag.
+        inline
+        bool is_colorized(std::ostream& stream)
+        {
+            return is_atty(stream) || static_cast<bool>(stream.iword(colorize_index()));
+        }
+
+        //! Test whether a given `std::ostream` object refers to
+        //! a terminal.
+        inline
+        bool is_atty(const std::ostream& stream)
+        {
+            FILE* std_stream = get_standard_stream(stream);
+
+            // Unfortunately, fileno() ends with segmentation fault
+            // if invalid file descriptor is passed. So we need to
+            // handle this case gracefully and assume it's not a tty
+            // if standard stream is not detected, and 0 is returned.
+            if (!std_stream)
+                return false;
+
+        #if defined(TERMCOLOR_TARGET_POSIX)
+            return ::isatty(fileno(std_stream));
+        #elif defined(TERMCOLOR_TARGET_WINDOWS)
+            return ::_isatty(_fileno(std_stream));
+        #else
+            return false;
+        #endif
+        }
+
+    #if defined(TERMCOLOR_TARGET_WINDOWS)
+        //! Change Windows Terminal colors attribute. If some
+        //! parameter is `-1` then attribute won't changed.
+        inline void win_change_attributes(std::ostream& stream, int foreground, int background)
+        {
+            // yeah, i know.. it's ugly, it's windows.
+            static WORD defaultAttributes = 0;
+
+            // Windows doesn't have ANSI escape sequences and so we use special
+            // API to change Terminal output color. That means we can't
+            // manipulate colors by means of "std::stringstream" and hence
+            // should do nothing in this case.
+            if (!_internal::is_atty(stream))
+                return;
+
+            // get terminal handle
+            HANDLE hTerminal = INVALID_HANDLE_VALUE;
+            if (&stream == &std::cout)
+                hTerminal = GetStdHandle(STD_OUTPUT_HANDLE);
+            else if (&stream == &std::cerr)
+                hTerminal = GetStdHandle(STD_ERROR_HANDLE);
+
+            // save default terminal attributes if it unsaved
+            if (!defaultAttributes)
+            {
+                CONSOLE_SCREEN_BUFFER_INFO info;
+                if (!GetConsoleScreenBufferInfo(hTerminal, &info))
+                    return;
+                defaultAttributes = info.wAttributes;
+            }
+
+            // restore all default settings
+            if (foreground == -1 && background == -1)
+            {
+                SetConsoleTextAttribute(hTerminal, defaultAttributes);
+                return;
+            }
+
+            // get current settings
+            CONSOLE_SCREEN_BUFFER_INFO info;
+            if (!GetConsoleScreenBufferInfo(hTerminal, &info))
+                return;
+
+            if (foreground != -1)
+            {
+                info.wAttributes &= ~(info.wAttributes & 0x0F);
+                info.wAttributes |= static_cast<WORD>(foreground);
+            }
+
+            if (background != -1)
+            {
+                info.wAttributes &= ~(info.wAttributes & 0xF0);
+                info.wAttributes |= static_cast<WORD>(background);
+            }
+
+            SetConsoleTextAttribute(hTerminal, info.wAttributes);
+        }
+    #endif // TERMCOLOR_TARGET_WINDOWS
+
+    } // namespace _internal
+
+} // namespace termcolor
+
+
+#undef TERMCOLOR_TARGET_POSIX
+#undef TERMCOLOR_TARGET_WINDOWS
+
+#if defined(TERMCOLOR_AUTODETECTED_IMPLEMENTATION)
+#   undef TERMCOLOR_USE_ANSI_ESCAPE_SEQUENCES
+#   undef TERMCOLOR_USE_WINDOWS_API
+#endif
+
+#endif // TERMCOLOR_HPP_
diff --git a/indicators/terminal_size.hpp b/indicators/terminal_size.hpp
new file mode 100644
index 0000000..0d03077
--- /dev/null
+++ b/indicators/terminal_size.hpp
@@ -0,0 +1,44 @@
+
+#ifndef INDICATORS_TERMINAL_SIZE
+#define INDICATORS_TERMINAL_SIZE
+#include <utility>
+
+
+#if defined(_WIN32)
+#include <windows.h>
+
+namespace indicators {
+
+static inline std::pair<size_t, size_t> terminal_size() {
+  CONSOLE_SCREEN_BUFFER_INFO csbi;
+  int cols, rows;
+  GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
+  cols = csbi.srWindow.Right - csbi.srWindow.Left + 1;
+  rows = csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
+  return {static_cast<size_t>(rows), static_cast<size_t>(cols)};
+}
+
+static inline size_t terminal_width() { return terminal_size().second; }
+
+} // namespace indicators
+
+#else
+
+#include <sys/ioctl.h> //ioctl() and TIOCGWINSZ
+#include <unistd.h>    // for STDOUT_FILENO
+
+namespace indicators {
+
+static inline std::pair<size_t, size_t> terminal_size() {
+  struct winsize size{};
+  ioctl(STDOUT_FILENO, TIOCGWINSZ, &size);
+  return {static_cast<size_t>(size.ws_row), static_cast<size_t>(size.ws_col)};
+}
+
+static inline size_t terminal_width() { return terminal_size().second; }
+
+} // namespace indicators
+
+#endif
+
+#endif
\ No newline at end of file
diff --git a/llmai.cpp b/llmai.cpp
new file mode 100644
index 0000000..50cbfe5
--- /dev/null
+++ b/llmai.cpp
@@ -0,0 +1,123 @@
+#include "llmai.h"
+
+#include <iostream>
+#include <cassert>
+
+std::string llama_token_to_piece(const llama_model* model, llama_token token)
+{
+	std::vector<char> result(8, 0);
+	const int n_tokens = llama_token_to_piece(model, token, result.data(), result.size());
+	if (n_tokens < 0)
+	{
+		result.resize(-n_tokens);
+		int check = llama_token_to_piece(model, token, result.data(), result.size());
+		assert(check == -n_tokens);
+	} else
+	{
+		result.resize(n_tokens);
+	}
+
+	return std::string(result.data(), result.size());
+}
+
+std::string llama_untokenize(const std::vector<llama_token>& tokens, const llama_model* model)
+{
+	std::string out;
+	out.reserve(tokens.size()*2);
+	for(const llama_token token : tokens)
+		out.append(llama_token_to_piece(model, token));
+	return out;
+}
+
+static void llama_batch_add(llama_batch& batch, llama_token id, llama_pos pos, const std::vector<llama_seq_id> &seq_ids, bool logits)
+{
+	batch.token   [batch.n_tokens] = id;
+	batch.pos     [batch.n_tokens] = pos;
+	batch.n_seq_id[batch.n_tokens] = seq_ids.size();
+	for (size_t i = 0; i < seq_ids.size(); ++i)
+		batch.seq_id[batch.n_tokens][i] = seq_ids[i];
+	batch.logits  [batch.n_tokens] = logits;
+
+	batch.n_tokens++;
+}
+
+std::vector<llama_token> generate_text(std::vector<llama_token> prompt, llama_model* model, int batch_size)
+{
+	std::vector<llama_token> out;
+	llama_context_params ctx_params = llama_context_default_params();
+	ctx_params.n_ctx = 2048;
+	ctx_params.n_threads = 16;
+	ctx_params.n_threads_batch = 16;
+
+	llama_context *ctx = llama_new_context_with_model(model, ctx_params);
+	if(!ctx)
+	{
+		std::cerr<<"Unable to create context\n";
+		return out;
+    }
+
+	llama_batch batch = llama_batch_init(1024*batch_size, 0, 1);
+
+	batch.n_tokens = 0;
+	for (size_t i = 0; i < prompt.size(); i++)
+		llama_batch_add(batch, prompt[i], i, { 0 }, false);
+	batch.logits[batch.n_tokens - 1] = true;
+
+	int32_t ret = llama_decode(ctx, batch);
+
+	if(ret != 0)
+	{
+		std::cout<<"WARNING: unable to decode context\n";
+		return out;
+	}
+
+	int n_cur    = batch.n_tokens;
+	int n_decode = 0;
+	while (n_cur <= 1024)
+	{
+		{
+			auto   n_vocab = llama_n_vocab(model);
+			auto * logits  = llama_get_logits_ith(ctx, batch.n_tokens - 1);
+
+			std::vector<llama_token_data> candidates;
+			candidates.reserve(n_vocab);
+
+			for (llama_token token_id = 0; token_id < n_vocab; token_id++) {
+				candidates.emplace_back(llama_token_data{ token_id, logits[token_id], 0.0f });
+			}
+
+			llama_token_data_array candidates_p = {candidates.data(), candidates.size(), false};
+
+			// sample the most likely token
+			const llama_token new_token_id = llama_sample_token_greedy(ctx, &candidates_p);
+
+			// is it an end of stream?
+			if (new_token_id == llama_token_eos(model))
+				break;
+
+			out.push_back(new_token_id);
+
+			// prepare the next batch
+			batch.n_tokens = 0;
+
+			// push this new token for next evaluation
+			llama_batch_add(batch, new_token_id, n_cur, { 0 }, true);
+
+			n_decode += 1;
+		}
+
+		n_cur += 1;
+
+		ret = llama_decode(ctx, batch);
+		if(ret != 0)
+		{
+			std::cout<<"WARNING: unable to decode context\n";
+			break;
+		}
+	}
+
+	llama_batch_free(batch);
+    llama_free(ctx);
+
+	return out;
+}
diff --git a/llmai.h b/llmai.h
new file mode 100644
index 0000000..26d3426
--- /dev/null
+++ b/llmai.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <llama.h>
+#include <vector>
+#include <string>
+
+std::vector<llama_token> generate_text(std::vector<llama_token> prompt, llama_model* model);
+std::string llama_untokenize(const std::vector<llama_token>& tokens, const llama_model* model);
+std::string llama_token_to_piece(const llama_model* model, llama_token token);
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..53d5ff9
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,196 @@
+#include <climits>
+#include <iostream>
+#include <numeric>
+#include <vector>
+#include <string>
+#include <filesystem>
+#include <functional>
+#include <llama.h>
+#include <algorithm>
+#include <thread>
+#include <cctype>
+#include <fstream>
+
+#include "options.h"
+#include "utils.h"
+#include "bar.h"
+#include "llmai.h"
+#include "tag.h"
+
+static bool match_music_files(const std::filesystem::path& path)
+{
+	static const std::vector<std::string> musicExtensions = {".mp3", ".ogg", ".flac", ".opus"};
+	auto search = std::find(musicExtensions.begin(), musicExtensions.end(), path.extension());
+	return search != musicExtensions.end();
+}
+
+static std::vector<llama_token> tokenize_path(const std::filesystem::path& p, llama_model *model, indicators::ProgressBar* bar = nullptr)
+{
+	constexpr int32_t max_len = 255;
+	std::vector<llama_token> out(max_len);
+
+	std::string filename = p.filename().string();
+
+	int32_t ret = llama_tokenize(model, filename.c_str(), filename.length(), out.data(), out.size(), false, false);
+
+	if(ret < 0)
+		out.clear();
+
+	out.resize(ret);
+
+	if(bar)
+		bar->tick();
+
+	return out;
+}
+
+std::vector<std::string> get_responses_for_paths(llama_model* model, const std::vector<std::filesystem::path>& prompts)
+{
+	auto* bar = bar_create_new("Tokenizeing prompts", prompts.size());
+	std::vector<std::vector<llama_token>> tokenizedPrompts(prompts.size());
+	std::transform(prompts.begin(), prompts.end(), tokenizedPrompts.begin(), [model, bar](const std::filesystem::path& p){return tokenize_path(p, model, bar);});
+	delete bar;
+
+	std::vector<std::string> responses(prompts.size());
+
+	bar = bar_create_new("Generating responses", prompts.size());
+	for(size_t i = 0; i < prompts.size(); ++i)
+	{
+		std::vector<llama_token> tokens = generate_text(tokenizedPrompts[i], model);
+		responses[i] = llama_untokenize(tokens, model);
+		bar->tick();
+	}
+	delete bar;
+
+	return responses;
+}
+
+void drop_log(enum ggml_log_level level, const char* text, void* user_data)
+{
+	(void)level;
+	(void)text;
+	(void)user_data;
+}
+
+
+std::vector<AiTags> parse_tags_from_responses(const std::vector<std::string>& responses, const std::vector<std::filesystem::path>& paths)
+{
+	assert(responses.size() == paths.size());
+
+	std::vector<AiTags> out(responses.size());
+	auto bar = bar_create_new("Processing responses", responses.size());
+	#pragma omp parallel for
+	for(size_t i = 0; i < responses.size(); ++i)
+	{
+		out[i].parseFromResponse(responses[i], paths[i]);
+		bar->tick();
+	}
+	delete bar;
+
+	return out;
+}
+
+int main(int argc, char** argv)
+{
+	Config config = get_arguments(argc, argv);
+
+	if(!config.debug)
+		llama_log_set(drop_log, nullptr);
+	llama_backend_init(false);
+	llama_model_params modelParams = llama_model_default_params();
+	modelParams.n_gpu_layers = config.gpu ? 1000 : 0;
+	llama_model* model = llama_load_model_from_file(config.model.c_str(), modelParams);
+
+	if(!model)
+	{
+		std::cerr<<"Unable to load model from "<<config.model<<'\n';
+		return 2;
+	}
+
+	std::thread* barThread = bar_create_new_indeterminate("Searching for music files");
+	std::vector<std::filesystem::path> muiscPaths = recursive_get_matching_files(config.in, match_music_files);
+	bar_stop_indeterminate(barThread);
+
+	std::vector<std::string> responses = get_responses_for_paths(model, muiscPaths);
+	llama_free_model(model);
+	llama_backend_free();
+
+	if(config.debug)
+	{
+		std::ofstream file;
+		file.open("./debug.log");
+		if(file.is_open())
+		{
+			for(size_t i = 0; i < responses.size(); ++i)
+				file<<muiscPaths[i]<<":\n"<<responses[i]<<"\n\n";
+			file.close();
+		}
+		else
+		{
+			std::cerr<<"could not open ./debug.log for writeing";
+		}
+	}
+
+	std::vector<AiTags> aiTags = parse_tags_from_responses(responses, muiscPaths);
+
+	if(!std::filesystem::is_directory(config.out) && !std::filesystem::create_directory(config.out))
+	{
+		std::cerr<<config.out<<" is not a directory and a directory could not be created at this location\n";
+		return 1;
+	}
+
+
+	if(!config.rejectDir.empty() && !std::filesystem::is_directory(config.rejectDir) && !std::filesystem::create_directory(config.rejectDir))
+	{
+		std::cerr<<config.rejectDir<<" is not a directory and a directory could not be created at this location\n";
+		return 1;
+	}
+
+	auto bar = bar_create_new("Writeing tags to disk", aiTags.size());
+
+	#pragma omp parallel for
+	for(AiTags& tag : aiTags)
+	{
+		bar->tick();
+		if(!tag.isFilled())
+		{
+			std::error_code ec;
+			std::filesystem::copy(tag.path, config.rejectDir, ec);
+			if(ec)
+				std::cerr<<ec.message()<<'\n';
+			continue;
+		}
+
+
+		std::filesystem::path artistDir;
+		if(config.flatOutput)
+		{
+			artistDir = config.out;
+		}
+		else
+		{
+			artistDir = config.out/tag.artist;
+			if(!std::filesystem::is_directory(artistDir) && !std::filesystem::create_directory(artistDir))
+			{
+				std::cerr<<artistDir<<" is not a directory and a directory could not be created at this location\n";
+				return 1;
+			}
+		}
+
+		std::error_code ec;
+		std::filesystem::copy(tag.path, artistDir, ec);
+		if(ec)
+		{
+			std::cerr<<ec.message()<<'\n';
+			continue;
+		}
+		tag.path = artistDir/tag.path.filename();
+
+		tag.writeToFile();
+	}
+
+	delete bar;
+
+	return 0;
+}
+
diff --git a/options.h b/options.h
new file mode 100644
index 0000000..877c3b1
--- /dev/null
+++ b/options.h
@@ -0,0 +1,54 @@
+#pragma once
+
+#include <iostream>
+#include <filesystem>
+#include "argparse.h"
+
+struct Config
+{
+	bool flatOutput;
+	bool noAlbum;
+	bool debug;
+	bool gpu;
+	std::filesystem::path model;
+	std::filesystem::path out;
+	std::filesystem::path in;
+	std::filesystem::path rejectDir;
+};
+
+static Config get_arguments(int argc, char** argv)
+{
+	Config config;
+	argparse::ArgumentParser parser(PROG_NAME);
+
+	parser.add_argument("-n", "--no-album").help("don't try to figure out the album").flag();
+	parser.add_argument("-f", "--flat").help("output the tagged files into a flat directory").flag();
+	parser.add_argument("-d", "--debug").help("output debug infomation").flag();
+	parser.add_argument("-g", "--gpu").help("use gpu").flag();
+	parser.add_argument("PATH").help("a directory where the music files are stored");
+	parser.add_argument("-r", "--reject").help("place to copy the files that where not tagged");
+	parser.add_argument("-o", "--out").help("the directory where the tagged files are to be placed").default_value("out");
+	parser.add_argument("-m", "--model").help("the ai model to use").required();
+
+	try
+	{
+		parser.parse_args(argc, argv);
+	}
+	catch (const std::exception& err)
+	{
+		std::cerr<<err.what()<<std::endl;
+		std::cerr<<parser;
+		exit(1);
+	}
+
+	config.noAlbum = parser.get<bool>("--no-album");
+	config.flatOutput = parser.get<bool>("--flat");
+	config.debug = parser.get<bool>("--debug");
+	config.gpu = parser.get<bool>("--gpu");
+	config.in = parser.get<std::string>("PATH");
+	config.out = parser.get<std::string>("--out");
+	config.rejectDir = parser.get<std::string>("--reject");
+	config.model = parser.get<std::string>("--model");
+
+	return config;
+}
diff --git a/tag.cpp b/tag.cpp
new file mode 100644
index 0000000..1d3a3ca
--- /dev/null
+++ b/tag.cpp
@@ -0,0 +1,99 @@
+#include "tag.h"
+
+#include <algorithm>
+#include <filesystem>
+#include <tagparser/abstractattachment.h>
+#include <tagparser/diagnostics.h>
+#include <tagparser/mediafileinfo.h>
+#include <tagparser/progressfeedback.h>
+#include <tagparser/tag.h>
+#include <tagparser/tagvalue.h>
+
+
+#include "utils.h"
+
+
+bool AiTags::isFilled() const
+{
+	return !artist.empty() && !title.empty();
+}
+
+void AiTags::parseFromResponse(const std::string& response, const std::filesystem::path &path, bool noAlbum)
+{
+	this->path = path;
+	std::vector<std::string> lines = tokenize(response, '\n');
+	for(std::string& line : lines)
+	{
+		std::string* target;
+		if(line.starts_with("artist:"))
+			target = &artist;
+		else if(line.starts_with("title:"))
+			target = &title;
+		else if(line.starts_with("album:") && !noAlbum)
+			target = &album;
+		else
+			continue;
+
+		formatCandiateTag(line);
+		if(checkCandiateTag(line, path))
+			*target = line;
+	}
+}
+
+bool AiTags::writeToFile() const
+{
+	TagParser::MediaFileInfo fileInfo;
+	TagParser::Diagnostics diag;
+	TagParser::AbortableProgressFeedback prog;
+
+	try
+	{
+		fileInfo.setPath(path);
+		fileInfo.open();
+
+		fileInfo.parseEverything(diag, prog);
+		fileInfo.createAppropriateTags();
+
+		for(TagParser::Tag* tag : fileInfo.tags())
+		{
+			if(!title.empty())
+				tag->setValue(TagParser::KnownField::Title, TagParser::TagValue(title, TagParser::TagTextEncoding::Utf8, tag->proposedTextEncoding()));
+			if(!artist.empty())
+				tag->setValue(TagParser::KnownField::Artist, TagParser::TagValue(artist, TagParser::TagTextEncoding::Utf8, tag->proposedTextEncoding()));
+			if(!album.empty())
+				tag->setValue(TagParser::KnownField::Album, TagParser::TagValue(album, TagParser::TagTextEncoding::Utf8, tag->proposedTextEncoding()));
+		}
+
+		fileInfo.applyChanges(diag, prog);
+		std::filesystem::path backupPath = path;
+		backupPath+=std::filesystem::path(".bak");
+		std::filesystem::remove(backupPath);
+	}
+	catch(std::ios_base::failure& err)
+	{
+		return false;
+	}
+
+	return true;
+}
+
+bool AiTags::formatCandiateTag(std::string& tag)
+{
+	std::vector<std::string> tokens = tokenize(tag, ':');
+	if(tokens.size() < 2)
+		return false;
+	tag = tokens[1];
+	tag.erase(0, 1);
+
+	return true;
+}
+
+bool AiTags::checkCandiateTag(std::string tag, const std::filesystem::path& path)
+{
+	std::string pathStr = path.string();
+	std::transform(tag.begin(), tag.end(), tag.begin(), [](unsigned char c){ return std::tolower(c); });
+	std::transform(pathStr.begin(), pathStr.end(), pathStr.begin(), [](unsigned char c){ return std::tolower(c); });
+
+	auto search = pathStr.find(tag);
+	return search != std::string::npos;
+}
diff --git a/tag.h b/tag.h
new file mode 100644
index 0000000..00bdbbd
--- /dev/null
+++ b/tag.h
@@ -0,0 +1,20 @@
+#pragma once
+#include <filesystem>
+#include <string>
+
+class AiTags
+{
+private:
+	static bool formatCandiateTag(std::string& tag);
+	static bool checkCandiateTag(std::string tag, const std::filesystem::path& path);
+
+public:
+	std::filesystem::path path;
+	std::string artist;
+	std::string title;
+	std::string album;
+
+	bool isFilled() const;
+	void parseFromResponse(const std::string& response, const std::filesystem::path &path, bool noAlbum = false);
+	bool writeToFile() const;
+};
diff --git a/testtag.cpp b/testtag.cpp
new file mode 100644
index 0000000..15e95d1
--- /dev/null
+++ b/testtag.cpp
@@ -0,0 +1,42 @@
+#include <iostream>
+#include <tagparser/abstractattachment.h>
+#include <tagparser/diagnostics.h>
+#include <tagparser/mediafileinfo.h>
+#include <tagparser/progressfeedback.h>
+#include <tagparser/tag.h>
+#include <tagparser/tagvalue.h>
+
+int main(int argc, char** argv)
+{
+	if(argc < 2)
+		return 1;
+
+	TagParser::MediaFileInfo fileInfo;
+	TagParser::Diagnostics diag;
+	TagParser::AbortableProgressFeedback prog;
+
+	try
+	{
+		fileInfo.setPath(std::string(argv[1]));
+		fileInfo.open();
+
+		fileInfo.parseTags(diag, prog);
+
+		std::vector<TagParser::Tag*> tags = fileInfo.tags();
+		for(TagParser::Tag* tag : tags)
+		{
+			std::cout<<tag->value(TagParser::KnownField::Title).toString()<<'\n';
+			std::cout<<tag->value(TagParser::KnownField::Artist).toString()<<'\n';
+			std::cout<<tag->value(TagParser::KnownField::Album).toString()<<'\n';
+		}
+	}
+	catch(std::ios_base::failure& err)
+	{
+		std::cout<<"std::ios_base::failure: "<<err.what()<<'\n';
+		return 1;
+	}
+
+
+
+	return 0;
+}
diff --git a/utils.cpp b/utils.cpp
new file mode 100644
index 0000000..598407a
--- /dev/null
+++ b/utils.cpp
@@ -0,0 +1,75 @@
+#include "utils.h"
+
+std::vector<std::string> tokenize(const std::string& str, const char delim, const char ignBracketStart, const char ignBracketEnd)
+{
+	std::stringstream ss(str);
+	std::vector<std::string> tokens;
+
+	std::string token;
+	size_t bracketCounter = 0;
+	for(char ch : str)
+	{
+		if(ch == delim && bracketCounter == 0)
+		{
+			tokens.push_back(token);
+			token.clear();
+		}
+		else
+		{
+			token.push_back(ch);
+		}
+
+		if(ignBracketStart == ch)
+			++bracketCounter;
+		else if(ignBracketEnd == ch)
+			--bracketCounter;
+	}
+	if(bracketCounter == 0)
+		tokens.push_back(token);
+	return tokens;
+}
+
+std::string stripWhitespace(const std::string& in)
+{
+	std::string out;
+	out.reserve(in.size());
+	for(char ch : in)
+	{
+		if(ch <= 32 || ch == 127)
+			continue;
+		out.push_back(ch);
+	}
+	return out;
+}
+
+static void recursive_get_matching_files_impl(const std::filesystem::path& path,
+                                                                     std::function<bool(const std::filesystem::path&)> pred,
+                                                                     std::vector<std::filesystem::path>& paths)
+{
+	if(!std::filesystem::is_directory(path) && pred(path))
+	{
+		paths.push_back(path);
+	}
+	else if(std::filesystem::is_directory(path))
+	{
+		for(auto const& dirent : std::filesystem::directory_iterator{path})
+		{
+			try
+			{
+				recursive_get_matching_files_impl(dirent.path(), pred, paths);
+			}
+			catch(const std::filesystem::filesystem_error& err)
+			{
+				continue;
+			}
+		}
+	}
+}
+
+std::vector<std::filesystem::path> recursive_get_matching_files(const std::filesystem::path& path,
+	std::function<bool(const std::filesystem::path&)> pred)
+{
+	std::vector<std::filesystem::path> out;
+	recursive_get_matching_files_impl(path, pred, out);
+	return out;
+}
diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..1513a50
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,13 @@
+#pragma once
+#include <string>
+#include <vector>
+#include <filesystem>
+#include <functional>
+
+std::vector<std::string> tokenize(const std::string& str, const char delim = ' ', const char ignBracketStart = '\0', const char ignBracketEnd = '\0');
+
+std::string stripWhitespace(const std::string& in);
+
+std::vector<std::filesystem::path> recursive_get_matching_files(const std::filesystem::path& path,
+	std::function<bool(const std::filesystem::path&)> pred = [](const std::filesystem::path&) -> bool{return true;});
+