para

';
	@parts.push: '&' ~ $single.anchor with $single.anchor;
	@parts.push: '<' ~ $single.tag.full-name($namespace) ~ '>' with $single.tag;
	@parts.push: $single.type ~ escape-chars($single.value);
	take @parts.join(' ');
}



multi emit-yaml(Mapping $mapping, Namespace $namespace) {
	take '+MAP';
	for $mapping.elems -> $pair {
		emit-yaml($pair.key, $namespace);
		emit-yaml($pair.value, $namespace);
	}
	take '-MAP';
}

multi emit-yaml(Sequence $sequence, Namespace $namespace) {
	take '+SEQ';
	for $sequence.elems -> $elem {
		emit-yaml($elem, $namespace);
	}
	take '-SEQ';
}

multi emit-yaml(Alias $alias, Namespace $namespace) {
	take '


our sub stream-yaml(Str $input) is export {
	gather {
		if Grammar.parse($input) -> $match {
			take '+STR';
			for $match.ast -> $document {
				take '+DOC' ~ ($document.explicit ?? ' ---' !! '');
				emit-yaml($document.root, $document.namespace);
				take '-DOC';
			}
			take '-STR';
		}
	}
}

proto to-yaml($;$ = Str, :$sorted) {*}

multi to-yaml(Real:D $d; $ = Str, :$sorted) { ~$d }
multi to-yaml(Bool:D $d; $ = Str, :$sorted) { $d ?? 'true' !! 'false'; }
multi to-yaml(Str:D  $d where /^ <!Schema::Core::element> <[\w.-]>+ $/; $ = Str) {
	return $d;
}
multi to-yaml(Str:D  $d; $, :$sorted) {
	return '"' ~ escape-chars($d).trans(['"'] => ['\"']) ~ '"'
}
multi to-yaml(Positional:D $d, Str $indent, :$sorted) {
	return ' []' unless ?$d;
	return "\n" ~ $d.map({ "$indent\- " ~ to-yaml($_, $indent ~ '  ', :$sorted) }).join("\n");
}
multi to-yaml(Associative:D $d, Str $indent, :$sorted) {
	return ' {}' unless ?$d;
	my @elems = $sorted ?? $d.sort !! $d.pairs;
	return "\n" ~ @elems.map({ $indent ~ to-yaml(.key, $indent, :$sorted) ~ ': ' ~ to-yaml(.value, $indent ~ '  ', :$sorted) }).join("\n")
}

multi to-yaml(Mu:U $, $, :$sorted) { '~' }
multi to-yaml(Mu:D $s, $, :$sorted) {
	die "Can't serialize an object of type " ~ $s.WHAT.perl
}

subset Collection where Positional|Associative;

proto to-yaml-doc($, :$sorted) { * }
multi to-yaml-doc(Collection $document, :$sorted) {
	return '---' ~ to-yaml($document, '', :$sorted) ~ "\n";
}
multi to-yaml-doc(Any $document, :$sorted) {
	return '--- ' ~ to-yaml($document, '', :$sorted) ~ "\n";
}

sub save-yaml($document, :$sorted = True --> Str) is export {
	to-yaml-doc($document, :$sorted) ~ "...";
}
sub save-yamls(**@documents, :$sorted = True --> Str) is export {
	@documents.map({ to-yaml-doc($_, :$sorted) }).join('') ~ "...";
}



head

YAMLish - a YAML parser/emitter written in pure raku


This is a YAML parser written in pure-raku.
It aims at being feature complete (though there still a few features left to implement). Patches are welcome.


code

=begin code :lang<console>

$ zef install YAMLish

=end code


item

This configuration file begins with a comment
followed by three lines of key/value:


=begin code
# key: value
lang: en
lat: 46.12345
lon: -82.6231
=end code


=begin code
use YAMLish;
my $str = "config.yml".IO.slurp:
my %conf = load-yaml $str;
say %conf<lang>; # OUTPUT: «en␤»
say %conf<lat>;  # OUTPUT: «46.12345␤»
say %conf<lon>;  # OUTPUT: «-82.6231␤»
=end code


root

README

TODO

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


Built with L<Podlite|https://podlite.org> — the markup and publishing tools behind this site.


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


YAMLish

VAL

ALI

NAME

DESCRIPTION

INSTALLATION

EXPORTED SUBS

Example use for a configuration file

TODO

AUTHOR

LICENSE

YAMLish v0.1.3

Authors

License

Dependencies

Test Dependencies

Provides

Documentation