NAME

Rainbow

Raku source code lexer

Synopsis

use Rainbow;

my %mapping =
    TEXT     => '#ffffff',
    KEYWORD  => "#e04c86",
    OPERATOR => "#e04c86",
    TYPE     => "#00ffff",
    ROUTINE  => "#978deb",
    STRING   => "#68f3ca",
    # ...
;

my $code = 'my $greet = "hello"; say "Oh $greet there!";';

my @tokens = Rainbow::tokenize($code);

my @fragments = @tokens.map: -> $t {
    my $color = %mapping{$t.type.key} // %mapping<TEXT>;
    say "$color: {$t.text}";
}

Description

This module can turn a piece of Raku code into a list of tokens. Assign each token a color and you have made yourself a Raku syntax highlighter.

See lib/Rainbow/Token.rakumod for the complete list of tokens.

Tokenizing sub-languages

In addition to the tokenize sub the following subs are provided that can be used to tokenize the respective sub-language. For strings you can provide modifiers that change which interpolations are possible.

sub tokenize-regex(Str $source)
sub tokenize-string(Str $source, :$q, :$s, :$a, :$h, :$f, :$c, :$b)
sub tokenize-rakudoc(Str $source)

AUTHOR

Patrick Böker patrick.boeker@posteo.de

THANKS

Thanks to Siavash Askari Nasr (CIAvash) for the Chroma Raku lexer which this module took as inspiration.

License

This module is distributed under the terms of the Artistic License 2.0.