para

head

code

=begin code
use ERK;
use MONKEY-SEE-NO-EVAL;

my $erk-code = q:to/END/;
	Hello! I’d like the first 10 primes, please.
	OK: <%= (1 .. ∞).grep({ .is-prime })[0 .. 9].join(', ') %>
	END

EVAL to-raku($erk-code);

# OUTPUT:
#   Hello! I’d like the first 10 primes, please.
#   OK: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29
=end code


ERK (Embedded RaKu) is a templating engine for evaluating Raku code embedded in
arbitrary text files. Heavily inspired by
L<ESH|https://github.com/jirutka/esh> (Embedded SHell), which is itself
like L<ERB|https://github.com/ruby/erb> (Embedded RuBy).


ERK has two tags for inserting Raku code and one for comments. Every opened tag
must be closed.


item

This package is free software; you may redistribute it and/or modify it under
the terms of the Artistic 2.0 license (see LICENSE).



use ERK::Grammar;
use ERK::Actions;

role X::ERK is Exception { }

class X::ERK::Invalid does X::ERK {
	method message() {
		'Input is not valid ERK code';
	}
}

my sub parse(Str:D() $erk --> List:D) is export {
	my $parsed = ERK::Grammar.parse: $erk, :actions(ERK::Actions);

	X::ERK::Invalid.new.throw if not defined $parsed;

	return $parsed.made;
}

#| Convert ERK code to Raku code
my sub to-raku(Str:D() $erk --> Str:D) is export {
	my Str $raku;

	my Bool $gotta-trim = False;
	my Str  $trailing-ws = '';

	for parse($erk) -> $section {
		$raku ~= "'" ~ $trailing-ws ~ "'" ~ '.print;'
			unless $section.trim-before or $trailing-ws eq '';

		$trailing-ws = '';

		given $section {
			when ERK::Section::Text {
				my $content = .content
				              .subst(:g, Q[\], Q[\\])
				              .subst(:g, "'", "\\'");

				$content ~~ s[ ^ \h* \v ] = '' if $gotta-trim;

				$trailing-ws = $content.subst(/ ^ .*? ( \h* $ ) /, *.[0].Str);

				$content ~~ s[ \h* $ ] = '';

				$raku ~= "'" ~ $content ~ "'" ~ '.print;'
					unless $content eq '';
			}

			when ERK::Section::Code {
				$raku ~= .content ~ ";\n";
			}

			when ERK::Section::Expression {
				$raku ~= '(' ~ .content ~ ')' ~ '.print;'
					unless .content ~~ / ^ \s* $ /;
			}

			when ERK::Section::Comment {
				;
			}
		}

		$gotta-trim = $section.trim-after;
	}

	return $raku;
}


root

README

React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<AI|file:../mcp/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>
    =item2 L<Hand these documents to an AI assistant|file:../mcp/index.podlite>

=end nested
=begin nested :!nested
=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>

=end nested
=end React


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ERK

NAME

SYNOPSIS

DESCRIPTION

TEMPLATE SYNTAX

COPYRIGHT AND LICENSE

ERK v1.1.4

Authors

License

Dependencies

Test Dependencies

Provides

Documentation