import std.stdio;

​

enum BashForeground

{

    default_     = 39,

    black        = 30,

    red          = 31,

    green        = 32,

    yellow       = 33,

    blue         = 34,

    magenta      = 35,

    cyan         = 36,

    lightgrey    = 37,

    darkgrey     = 90,

    lightred     = 91,

    lightgreen   = 92,

    lightyellow  = 93,

    lightblue    = 94,

    lightmagenta = 95,

    lightcyan    = 96,

    white        = 97,

}

​

enum BashFormat

{

    bright      = 1,

    dim         = 2,

    underlined  = 4,

    blink       = 5,

    invert      = 6,

    hidden      = 8,

}

​

private string colorImpl(int code)(const string text)

{

    import std.array : Appender;

    import std.format : format;

    Appender!string sink;

    sink.reserve(text.length + 9);  // as below

    enum code = "\033[%dm".format(code); // 4 or 5 chars

    enum reset = "\033[0m"; // 4 chars

    sink.put(code);  // 4 or 5

    sink.put(text);  // text.length

    sink.put(reset); // 4

    return sink.data;

}

​

alias default_ = colorImpl!(BashForeground.default_);

alias black = colorImpl!(BashForeground.black);

alias red = colorImpl!(BashForeground.red);

alias green = colorImpl!(BashForeground.green);

alias yellow = colorImpl!(BashForeground.yellow);

alias blue = colorImpl!(BashForeground.blue);

alias magenta = colorImpl!(BashForeground.magenta);

alias cyan = colorImpl!(BashForeground.cyan);

alias lightgrey = colorImpl!(BashForeground.lightgrey);

alias darkgrey = colorImpl!(BashForeground.darkgrey);

alias lightred = colorImpl!(BashForeground.lightred);

alias lightgreen = colorImpl!(BashForeground.lightgreen);

alias lightyellow = colorImpl!(BashForeground.lightyellow);

alias lightblue = colorImpl!(BashForeground.lightblue);

alias lightmagenta = colorImpl!(BashForeground.lightmagenta);

alias lightcyan = colorImpl!(BashForeground.lightcyan);

alias white = colorImpl!(BashForeground.white);

​

alias bright = colorImpl!(BashFormat.bright);  // bold

alias dim = colorImpl!(BashFormat.dim);

alias underlined = colorImpl!(BashFormat.underlined);

alias blink = colorImpl!(BashFormat.blink);

alias invert = colorImpl!(BashFormat.invert);

alias hidden = colorImpl!(BashFormat.hidden);

​

​

/*

// Automates the above alias spam but does not work with UFCS

// because of https://issues.dlang.org/show_bug.cgi?id=19286

​

import std.traits : EnumMembers;

static foreach (immutable i, immutable color; [ EnumMembers!BashForeground ])

{

    import std.format : format;

    mixin(q{ alias %s = colorImpl!(BashForeground.%1$s); }.format(color));

}

​

static foreach (immutable i, immutable color; [ EnumMembers!BashReset ])

{

    import std.format : format;

    mixin(q{ alias %s = colorImpl!(BashReset.%1$s); }.format(color));

}

*/

​

​

void main()

{

    writeln("default_".default_);

    writeln("black".black);

    writeln("red".red);

    writeln("green".green);

    writeln("yellow".yellow);

    writeln("blue".blue);

    writeln("magenta".magenta);

    writeln("cyan".cyan);

    writeln("lightgrey".lightgrey);

    writeln("darkgrey".darkgrey);

    writeln("lightred".lightred);

    writeln("lightgreen".lightgreen);

    writeln("lightyellow".lightyellow);

    writeln("lightblue".lightblue);

    writeln("lightmagenta".lightmagenta);

    writeln("lightcyan".lightcyan);

    writeln("white".white);

    writeln("yellow underlined".yellow.underlined);

    writeln("red dim".red.dim);

    writeln("green bright".green.bright);

    writeln("blue blink".blue.blink);

    writeln("magenta dim".magenta.dim);

    // ...

}