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 // Formatting library for C++ - color support
 //
 // Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
 // All rights reserved.
 //
 // For the license information refer to format.h.
 
 #ifndef FMT_COLOR_H_
 #define FMT_COLOR_H_
 
 #include "format.h"
 
 FMT_BEGIN_NAMESPACE
 FMT_MODULE_EXPORT_BEGIN
 
 enum class color : uint32_t {
   alice_blue = 0xF0F8FF,               // rgb(240,248,255)
   antique_white = 0xFAEBD7,            // rgb(250,235,215)
   aqua = 0x00FFFF,                     // rgb(0,255,255)
   aquamarine = 0x7FFFD4,               // rgb(127,255,212)
   azure = 0xF0FFFF,                    // rgb(240,255,255)
   beige = 0xF5F5DC,                    // rgb(245,245,220)
   bisque = 0xFFE4C4,                   // rgb(255,228,196)
   black = 0x000000,                    // rgb(0,0,0)
   blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
   blue = 0x0000FF,                     // rgb(0,0,255)
   blue_violet = 0x8A2BE2,              // rgb(138,43,226)
   brown = 0xA52A2A,                    // rgb(165,42,42)
   burly_wood = 0xDEB887,               // rgb(222,184,135)
   cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
   chartreuse = 0x7FFF00,               // rgb(127,255,0)
   chocolate = 0xD2691E,                // rgb(210,105,30)
   coral = 0xFF7F50,                    // rgb(255,127,80)
   cornflower_blue = 0x6495ED,          // rgb(100,149,237)
   cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
   crimson = 0xDC143C,                  // rgb(220,20,60)
   cyan = 0x00FFFF,                     // rgb(0,255,255)
   dark_blue = 0x00008B,                // rgb(0,0,139)
   dark_cyan = 0x008B8B,                // rgb(0,139,139)
   dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
   dark_gray = 0xA9A9A9,                // rgb(169,169,169)
   dark_green = 0x006400,               // rgb(0,100,0)
   dark_khaki = 0xBDB76B,               // rgb(189,183,107)
   dark_magenta = 0x8B008B,             // rgb(139,0,139)
   dark_olive_green = 0x556B2F,         // rgb(85,107,47)
   dark_orange = 0xFF8C00,              // rgb(255,140,0)
   dark_orchid = 0x9932CC,              // rgb(153,50,204)
   dark_red = 0x8B0000,                 // rgb(139,0,0)
   dark_salmon = 0xE9967A,              // rgb(233,150,122)
   dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
   dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
   dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
   dark_turquoise = 0x00CED1,           // rgb(0,206,209)
   dark_violet = 0x9400D3,              // rgb(148,0,211)
   deep_pink = 0xFF1493,                // rgb(255,20,147)
   deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
   dim_gray = 0x696969,                 // rgb(105,105,105)
   dodger_blue = 0x1E90FF,              // rgb(30,144,255)
   fire_brick = 0xB22222,               // rgb(178,34,34)
   floral_white = 0xFFFAF0,             // rgb(255,250,240)
   forest_green = 0x228B22,             // rgb(34,139,34)
   fuchsia = 0xFF00FF,                  // rgb(255,0,255)
   gainsboro = 0xDCDCDC,                // rgb(220,220,220)
   ghost_white = 0xF8F8FF,              // rgb(248,248,255)
   gold = 0xFFD700,                     // rgb(255,215,0)
   golden_rod = 0xDAA520,               // rgb(218,165,32)
   gray = 0x808080,                     // rgb(128,128,128)
   green = 0x008000,                    // rgb(0,128,0)
   green_yellow = 0xADFF2F,             // rgb(173,255,47)
   honey_dew = 0xF0FFF0,                // rgb(240,255,240)
   hot_pink = 0xFF69B4,                 // rgb(255,105,180)
   indian_red = 0xCD5C5C,               // rgb(205,92,92)
   indigo = 0x4B0082,                   // rgb(75,0,130)
   ivory = 0xFFFFF0,                    // rgb(255,255,240)
   khaki = 0xF0E68C,                    // rgb(240,230,140)
   lavender = 0xE6E6FA,                 // rgb(230,230,250)
   lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
   lawn_green = 0x7CFC00,               // rgb(124,252,0)
   lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
   light_blue = 0xADD8E6,               // rgb(173,216,230)
   light_coral = 0xF08080,              // rgb(240,128,128)
   light_cyan = 0xE0FFFF,               // rgb(224,255,255)
   light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
   light_gray = 0xD3D3D3,               // rgb(211,211,211)
   light_green = 0x90EE90,              // rgb(144,238,144)
   light_pink = 0xFFB6C1,               // rgb(255,182,193)
   light_salmon = 0xFFA07A,             // rgb(255,160,122)
   light_sea_green = 0x20B2AA,          // rgb(32,178,170)
   light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
   light_slate_gray = 0x778899,         // rgb(119,136,153)
   light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
   light_yellow = 0xFFFFE0,             // rgb(255,255,224)
   lime = 0x00FF00,                     // rgb(0,255,0)
   lime_green = 0x32CD32,               // rgb(50,205,50)
   linen = 0xFAF0E6,                    // rgb(250,240,230)
   magenta = 0xFF00FF,                  // rgb(255,0,255)
   maroon = 0x800000,                   // rgb(128,0,0)
   medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
   medium_blue = 0x0000CD,              // rgb(0,0,205)
   medium_orchid = 0xBA55D3,            // rgb(186,85,211)
   medium_purple = 0x9370DB,            // rgb(147,112,219)
   medium_sea_green = 0x3CB371,         // rgb(60,179,113)
   medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
   medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
   medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
   medium_violet_red = 0xC71585,        // rgb(199,21,133)
   midnight_blue = 0x191970,            // rgb(25,25,112)
   mint_cream = 0xF5FFFA,               // rgb(245,255,250)
   misty_rose = 0xFFE4E1,               // rgb(255,228,225)
   moccasin = 0xFFE4B5,                 // rgb(255,228,181)
   navajo_white = 0xFFDEAD,             // rgb(255,222,173)
   navy = 0x000080,                     // rgb(0,0,128)
   old_lace = 0xFDF5E6,                 // rgb(253,245,230)
   olive = 0x808000,                    // rgb(128,128,0)
   olive_drab = 0x6B8E23,               // rgb(107,142,35)
   orange = 0xFFA500,                   // rgb(255,165,0)
   orange_red = 0xFF4500,               // rgb(255,69,0)
   orchid = 0xDA70D6,                   // rgb(218,112,214)
   pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
   pale_green = 0x98FB98,               // rgb(152,251,152)
   pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
   pale_violet_red = 0xDB7093,          // rgb(219,112,147)
   papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
   peach_puff = 0xFFDAB9,               // rgb(255,218,185)
   peru = 0xCD853F,                     // rgb(205,133,63)
   pink = 0xFFC0CB,                     // rgb(255,192,203)
   plum = 0xDDA0DD,                     // rgb(221,160,221)
   powder_blue = 0xB0E0E6,              // rgb(176,224,230)
   purple = 0x800080,                   // rgb(128,0,128)
   rebecca_purple = 0x663399,           // rgb(102,51,153)
   red = 0xFF0000,                      // rgb(255,0,0)
   rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
   royal_blue = 0x4169E1,               // rgb(65,105,225)
   saddle_brown = 0x8B4513,             // rgb(139,69,19)
   salmon = 0xFA8072,                   // rgb(250,128,114)
   sandy_brown = 0xF4A460,              // rgb(244,164,96)
   sea_green = 0x2E8B57,                // rgb(46,139,87)
   sea_shell = 0xFFF5EE,                // rgb(255,245,238)
   sienna = 0xA0522D,                   // rgb(160,82,45)
   silver = 0xC0C0C0,                   // rgb(192,192,192)
   sky_blue = 0x87CEEB,                 // rgb(135,206,235)
   slate_blue = 0x6A5ACD,               // rgb(106,90,205)
   slate_gray = 0x708090,               // rgb(112,128,144)
   snow = 0xFFFAFA,                     // rgb(255,250,250)
   spring_green = 0x00FF7F,             // rgb(0,255,127)
   steel_blue = 0x4682B4,               // rgb(70,130,180)
   tan = 0xD2B48C,                      // rgb(210,180,140)
   teal = 0x008080,                     // rgb(0,128,128)
   thistle = 0xD8BFD8,                  // rgb(216,191,216)
   tomato = 0xFF6347,                   // rgb(255,99,71)
   turquoise = 0x40E0D0,                // rgb(64,224,208)
   violet = 0xEE82EE,                   // rgb(238,130,238)
   wheat = 0xF5DEB3,                    // rgb(245,222,179)
   white = 0xFFFFFF,                    // rgb(255,255,255)
   white_smoke = 0xF5F5F5,              // rgb(245,245,245)
   yellow = 0xFFFF00,                   // rgb(255,255,0)
   yellow_green = 0x9ACD32              // rgb(154,205,50)
 };                                     // enum class color
 
 enum class terminal_color : uint8_t {
   black = 30,
   red,
   green,
   yellow,
   blue,
   magenta,
   cyan,
   white,
   bright_black = 90,
   bright_red,
   bright_green,
   bright_yellow,
   bright_blue,
   bright_magenta,
   bright_cyan,
   bright_white
 };
 
 enum class emphasis : uint8_t {
   bold = 1,
   faint = 1 << 1,
   italic = 1 << 2,
   underline = 1 << 3,
   blink = 1 << 4,
   reverse = 1 << 5,
   conceal = 1 << 6,
   strikethrough = 1 << 7,
 };
 
 // rgb is a struct for red, green and blue colors.
 // Using the name "rgb" makes some editors show the color in a tooltip.
 struct rgb {
   FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
   FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
   FMT_CONSTEXPR rgb(uint32_t hex)
       : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
   FMT_CONSTEXPR rgb(color hex)
       : r((uint32_t(hex) >> 16) & 0xFF),
         g((uint32_t(hex) >> 8) & 0xFF),
         b(uint32_t(hex) & 0xFF) {}
   uint8_t r;
   uint8_t g;
   uint8_t b;
 };
 
 FMT_BEGIN_DETAIL_NAMESPACE
 
 // color is a struct of either a rgb color or a terminal color.
 struct color_type {
   FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {}
   FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} {
     value.rgb_color = static_cast<uint32_t>(rgb_color);
   }
   FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} {
     value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
                       (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
   }
   FMT_CONSTEXPR color_type(terminal_color term_color) noexcept
       : is_rgb(), value{} {
     value.term_color = static_cast<uint8_t>(term_color);
   }
   bool is_rgb;
   union color_union {
     uint8_t term_color;
     uint32_t rgb_color;
   } value;
 };
 
 FMT_END_DETAIL_NAMESPACE
 
 /** A text style consisting of foreground and background colors and emphasis. */
 class text_style {
  public:
   FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept
       : set_foreground_color(), set_background_color(), ems(em) {}
 
   FMT_CONSTEXPR text_style& operator|=(const text_style& rhs) {
     if (!set_foreground_color) {
       set_foreground_color = rhs.set_foreground_color;
       foreground_color = rhs.foreground_color;
     } else if (rhs.set_foreground_color) {
       if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
         FMT_THROW(format_error("can't OR a terminal color"));
       foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
     }
 
     if (!set_background_color) {
       set_background_color = rhs.set_background_color;
       background_color = rhs.background_color;
     } else if (rhs.set_background_color) {
       if (!background_color.is_rgb || !rhs.background_color.is_rgb)
         FMT_THROW(format_error("can't OR a terminal color"));
       background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
     }
 
     ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
                                 static_cast<uint8_t>(rhs.ems));
     return *this;
   }
 
   friend FMT_CONSTEXPR text_style operator|(text_style lhs,
                                             const text_style& rhs) {
     return lhs |= rhs;
   }
 
   FMT_CONSTEXPR bool has_foreground() const noexcept {
     return set_foreground_color;
   }
   FMT_CONSTEXPR bool has_background() const noexcept {
     return set_background_color;
   }
   FMT_CONSTEXPR bool has_emphasis() const noexcept {
     return static_cast<uint8_t>(ems) != 0;
   }
   FMT_CONSTEXPR detail::color_type get_foreground() const noexcept {
     FMT_ASSERT(has_foreground(), "no foreground specified for this style");
     return foreground_color;
   }
   FMT_CONSTEXPR detail::color_type get_background() const noexcept {
     FMT_ASSERT(has_background(), "no background specified for this style");
     return background_color;
   }
   FMT_CONSTEXPR emphasis get_emphasis() const noexcept {
     FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
     return ems;
   }
 
  private:
   FMT_CONSTEXPR text_style(bool is_foreground,
                            detail::color_type text_color) noexcept
       : set_foreground_color(), set_background_color(), ems() {
     if (is_foreground) {
       foreground_color = text_color;
       set_foreground_color = true;
     } else {
       background_color = text_color;
       set_background_color = true;
     }
   }
 
   friend FMT_CONSTEXPR text_style fg(detail::color_type foreground) noexcept;
 
   friend FMT_CONSTEXPR text_style bg(detail::color_type background) noexcept;
 
   detail::color_type foreground_color;
   detail::color_type background_color;
   bool set_foreground_color;
   bool set_background_color;
   emphasis ems;
 };
 
 /** Creates a text style from the foreground (text) color. */
 FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) noexcept {
   return text_style(true, foreground);
 }
 
 /** Creates a text style from the background color. */
 FMT_CONSTEXPR inline text_style bg(detail::color_type background) noexcept {
   return text_style(false, background);
 }
 
 FMT_CONSTEXPR inline text_style operator|(emphasis lhs, emphasis rhs) noexcept {
   return text_style(lhs) | rhs;
 }
 
 FMT_BEGIN_DETAIL_NAMESPACE
 
 template <typename Char> struct ansi_color_escape {
   FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
                                   const char* esc) noexcept {
     // If we have a terminal color, we need to output another escape code
     // sequence.
     if (!text_color.is_rgb) {
       bool is_background = esc == string_view("\x1b[48;2;");
       uint32_t value = text_color.value.term_color;
       // Background ASCII codes are the same as the foreground ones but with
       // 10 more.
       if (is_background) value += 10u;
 
       size_t index = 0;
       buffer[index++] = static_cast<Char>('\x1b');
       buffer[index++] = static_cast<Char>('[');
 
       if (value >= 100u) {
         buffer[index++] = static_cast<Char>('1');
         value %= 100u;
       }
       buffer[index++] = static_cast<Char>('0' + value / 10u);
       buffer[index++] = static_cast<Char>('0' + value % 10u);
 
       buffer[index++] = static_cast<Char>('m');
       buffer[index++] = static_cast<Char>('\0');
       return;
     }
 
     for (int i = 0; i < 7; i++) {
       buffer[i] = static_cast<Char>(esc[i]);
     }
     rgb color(text_color.value.rgb_color);
     to_esc(color.r, buffer + 7, ';');
     to_esc(color.g, buffer + 11, ';');
     to_esc(color.b, buffer + 15, 'm');
     buffer[19] = static_cast<Char>(0);
   }
   FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept {
     uint8_t em_codes[num_emphases] = {};
     if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
     if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
     if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
     if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
     if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
     if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
     if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
     if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
 
     size_t index = 0;
     for (size_t i = 0; i < num_emphases; ++i) {
       if (!em_codes[i]) continue;
       buffer[index++] = static_cast<Char>('\x1b');
       buffer[index++] = static_cast<Char>('[');
       buffer[index++] = static_cast<Char>('0' + em_codes[i]);
       buffer[index++] = static_cast<Char>('m');
     }
     buffer[index++] = static_cast<Char>(0);
   }
   FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; }
 
   FMT_CONSTEXPR const Char* begin() const noexcept { return buffer; }
   FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const noexcept {
     return buffer + std::char_traits<Char>::length(buffer);
   }
 
  private:
   static constexpr size_t num_emphases = 8;
   Char buffer[7u + 3u * num_emphases + 1u];
 
   static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
                                    char delimiter) noexcept {
     out[0] = static_cast<Char>('0' + c / 100);
     out[1] = static_cast<Char>('0' + c / 10 % 10);
     out[2] = static_cast<Char>('0' + c % 10);
     out[3] = static_cast<Char>(delimiter);
   }
   static FMT_CONSTEXPR bool has_emphasis(emphasis em, emphasis mask) noexcept {
     return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
   }
 };
 
 template <typename Char>
 FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
     detail::color_type foreground) noexcept {
   return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
 }
 
 template <typename Char>
 FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
     detail::color_type background) noexcept {
   return ansi_color_escape<Char>(background, "\x1b[48;2;");
 }
 
 template <typename Char>
 FMT_CONSTEXPR ansi_color_escape<Char> make_emphasis(emphasis em) noexcept {
   return ansi_color_escape<Char>(em);
 }
 
 template <typename Char> inline void fputs(const Char* chars, FILE* stream) {
   int result = std::fputs(chars, stream);
   if (result < 0)
     FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
 }
 
 template <> inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) {
   int result = std::fputws(chars, stream);
   if (result < 0)
     FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
 }
 
 template <typename Char> inline void reset_color(FILE* stream) {
   fputs("\x1b[0m", stream);
 }
 
 template <> inline void reset_color<wchar_t>(FILE* stream) {
   fputs(L"\x1b[0m", stream);
 }
 
 template <typename Char> inline void reset_color(buffer<Char>& buffer) {
   auto reset_color = string_view("\x1b[0m");
   buffer.append(reset_color.begin(), reset_color.end());
 }
 
 template <typename T> struct styled_arg {
   const T& value;
   text_style style;
 };
 
 template <typename Char>
 void vformat_to(buffer<Char>& buf, const text_style& ts,
                 basic_string_view<Char> format_str,
                 basic_format_args<buffer_context<type_identity_t<Char>>> args) {
   bool has_style = false;
   if (ts.has_emphasis()) {
     has_style = true;
     auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
     buf.append(emphasis.begin(), emphasis.end());
   }
   if (ts.has_foreground()) {
     has_style = true;
     auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
     buf.append(foreground.begin(), foreground.end());
   }
   if (ts.has_background()) {
     has_style = true;
     auto background = detail::make_background_color<Char>(ts.get_background());
     buf.append(background.begin(), background.end());
   }
   detail::vformat_to(buf, format_str, args, {});
   if (has_style) detail::reset_color<Char>(buf);
 }
 
 FMT_END_DETAIL_NAMESPACE
 
 template <typename S, typename Char = char_t<S>>
 void vprint(std::FILE* f, const text_style& ts, const S& format,
             basic_format_args<buffer_context<type_identity_t<Char>>> args) {
   basic_memory_buffer<Char> buf;
   detail::vformat_to(buf, ts, detail::to_string_view(format), args);
   if (detail::is_utf8()) {
     detail::print(f, basic_string_view<Char>(buf.begin(), buf.size()));
   } else {
     buf.push_back(Char(0));
     detail::fputs(buf.data(), f);
   }
 }
 
 /**
   \rst
   Formats a string and prints it to the specified file stream using ANSI
   escape sequences to specify text formatting.
 
   **Example**::
 
     fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
                "Elapsed time: {0:.2f} seconds", 1.23);
   \endrst
  */
 template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_string<S>::value)>
 void print(std::FILE* f, const text_style& ts, const S& format_str,
            const Args&... args) {
   vprint(f, ts, format_str,
          fmt::make_format_args<buffer_context<char_t<S>>>(args...));
 }
 
 /**
   \rst
   Formats a string and prints it to stdout using ANSI escape sequences to
   specify text formatting.
 
   **Example**::
 
     fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
                "Elapsed time: {0:.2f} seconds", 1.23);
   \endrst
  */
 template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_string<S>::value)>
 void print(const text_style& ts, const S& format_str, const Args&... args) {
   return print(stdout, ts, format_str, args...);
 }
 
 template <typename S, typename Char = char_t<S>>
 inline std::basic_string<Char> vformat(
     const text_style& ts, const S& format_str,
     basic_format_args<buffer_context<type_identity_t<Char>>> args) {
   basic_memory_buffer<Char> buf;
   detail::vformat_to(buf, ts, detail::to_string_view(format_str), args);
   return fmt::to_string(buf);
 }
 
 /**
   \rst
   Formats arguments and returns the result as a string using ANSI
   escape sequences to specify text formatting.
 
   **Example**::
 
     #include <fmt/color.h>
     std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
                                       "The answer is {}", 42);
   \endrst
 */
 template <typename S, typename... Args, typename Char = char_t<S>>
 inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
                                       const Args&... args) {
   return fmt::vformat(ts, detail::to_string_view(format_str),
                       fmt::make_format_args<buffer_context<Char>>(args...));
 }
 
 /**
   Formats a string with the given text_style and writes the output to ``out``.
  */
 template <typename OutputIt, typename Char,
           FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
 OutputIt vformat_to(
     OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
     basic_format_args<buffer_context<type_identity_t<Char>>> args) {
   auto&& buf = detail::get_buffer<Char>(out);
   detail::vformat_to(buf, ts, format_str, args);
   return detail::get_iterator(buf);
 }
 
 /**
   \rst
   Formats arguments with the given text_style, writes the result to the output
   iterator ``out`` and returns the iterator past the end of the output range.
 
   **Example**::
 
     std::vector<char> out;
     fmt::format_to(std::back_inserter(out),
                    fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
   \endrst
 */
 template <typename OutputIt, typename S, typename... Args,
           bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value&&
               detail::is_string<S>::value>
 inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
                       Args&&... args) ->
     typename std::enable_if<enable, OutputIt>::type {
   return vformat_to(out, ts, detail::to_string_view(format_str),
                     fmt::make_format_args<buffer_context<char_t<S>>>(args...));
 }
 
 template <typename T, typename Char>
 struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
   template <typename FormatContext>
   auto format(const detail::styled_arg<T>& arg, FormatContext& ctx) const
       -> decltype(ctx.out()) {
     const auto& ts = arg.style;
     const auto& value = arg.value;
     auto out = ctx.out();
 
     bool has_style = false;
     if (ts.has_emphasis()) {
       has_style = true;
       auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
       out = std::copy(emphasis.begin(), emphasis.end(), out);
     }
     if (ts.has_foreground()) {
       has_style = true;
       auto foreground =
           detail::make_foreground_color<Char>(ts.get_foreground());
       out = std::copy(foreground.begin(), foreground.end(), out);
     }
     if (ts.has_background()) {
       has_style = true;
       auto background =
           detail::make_background_color<Char>(ts.get_background());
       out = std::copy(background.begin(), background.end(), out);
     }
     out = formatter<T, Char>::format(value, ctx);
     if (has_style) {
       auto reset_color = string_view("\x1b[0m");
       out = std::copy(reset_color.begin(), reset_color.end(), out);
     }
     return out;
   }
 };
 
 /**
   \rst
   Returns an argument that will be formatted using ANSI escape sequences,
   to be used in a formatting function.
 
   **Example**::
 
     fmt::print("Elapsed time: {0:.2f} seconds",
                fmt::styled(1.23, fmt::fg(fmt::color::green) |
                                  fmt::bg(fmt::color::blue)));
   \endrst
  */
 template <typename T>
 FMT_CONSTEXPR auto styled(const T& value, text_style ts)
     -> detail::styled_arg<remove_cvref_t<T>> {
   return detail::styled_arg<remove_cvref_t<T>>{value, ts};
 }
 
 FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_COLOR_H_

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