masak/latest hitomi draft -- pe:if now works

## latest hitomi draft -- pe:if now works
$ cat hitomi
use v6;

grammar XML {
    regex TOP { ^ <pi>* <xmlcontent>+ {*} $ };

    token xmlcontent {
        | <node>           {*} #= node
        | <empty>          {*} #= empty
        | <content>        {*} #= content
    };

    rule node {
        '<' <name=ident> <attrs> '>'
        <xmlcontent>+
        '</' $<name> '>'
        {*}
    }

    rule pi { '<!' <.ident> <.ident> '>' };

    rule empty   { '<'  <name=ident> <attrs> '/>' {*} };

    token attrs { <attr>* {*} }
    rule attr { $<name>=[<.ident>[':'<.ident>]?] '=' '"' $<value>=[<-["]>+] '"' }

    token ident { <+alnum + [\-]>+ }

    regex content { <-[<]>+ {*} }
};
class XML::Actions {
    my $h = -> $/ {
        make [~] gather {
            for $/.chunks{
                if .key eq '~' {
                    take .value;
                } else {
                    take .value.ast;
                }
            }
        }
    }
    method TOP($/) {
        $h($/);
    }

    method xmlcontent($/, $key) {
        $h($/);
    }

    method node($/) {
        if $<attrs><attr> {
            for $<attrs><attr> -> $a {
                if $a<name> eq "pe:if" {
                    make eval(~$a<value>) ?? matching-if($/) !! q[];
                    return;
                }
                elsif $a<name> ~~ /^ 'pe:'/ {
                    make "Unknown 'pe:' attribute!";
                    return;
                }
            }
        }
        $h($/);
    }

    method empty($/) {
        $h($/);
    }

    method attrs($/) {
        $h($/);
    }
    method content($/) {
        make ~$/;
    }

    sub matching-if($/) {
        return $/.ast;
    }
}

# RAKUDO: Arguably wrong that this has to be here and not in the class.
#         [perl #65238]
sub links() {
    return [
        {
            :url<http://ihrd.livejournal.com/>,
            :title("ihrd's blog"),
            :username<ihrd>,
            :time(1240904601)
        },
        {   :url<http://blogs.gurulabs.com/stephen/>,
            :title("Tene's blog"),
            :username<Tene>,
            :time(1240905184),
        },
        {   :url<http://use.perl.org/~masak/journal/>,
            :title("masak's blog"),
            :username<masak>,
            :time(1240905293),
        },
    ];
}


my $xml = $*IN.slurp;
my $result = XML.parse($xml, :action(XML::Actions.new()));
print $result.ast;

# vim: ft=perl6


$ cat hitomi-example.xml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:pe="http://github.com/masak/hitomi">
  <head>
    <title>Slurp: News</title>
  </head>
  <body class="index">
    <div id="header">
      <h1>News</h1>
    </div>

    <ol pe:if="links">
      <li pe:for="links.reverse -> $link">
        <a href="${$link.url}">${$link.title}</a>
        posted by ${$link.username} at ${strftime('%x %X', $link.time)}
      </li>
    </ol>

    <p><a class="action" href="/submit/">Submit new link</a></p>

    <div id="footer">
      <hr />
      <p class="legalese">© 2009 The Web.pm authors, Artistic License 2.0</p>
    </div>
  </body>
</html>


$ perl6 hitomi < hitomi-example.xml
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:pe="http://github.com/masak/hitomi">
  <head>
    <title>Slurp: News</title>
  </head>
  <body class="index">
    <div id="header">
      <h1>News</h1>
    </div>

    <ol pe:if="links">
      <li pe:for="links.reverse -> $link">
        <a href="${$link.url}">${$link.title}</a>
        posted by ${$link.username} at ${strftime('%x %X', $link.time)}
      </li>
    </ol>

    <p><a class="action" href="/submit/">Submit new link</a></p>

    <div id="footer">
      <hr />
      <p class="legalese">© 2009 The Web.pm authors, Artistic License 2.0</p>
    </div>
  </body>
</html>
	$ cat hitomi
	use v6;

	grammar XML {
	regex TOP { ^ <pi>* <xmlcontent>+ {*} $ };

	token xmlcontent {
	\| <node> {*} #= node
	\| <empty> {*} #= empty
	\| <content> {*} #= content
	};

	rule node {
	'<' <name=ident> <attrs> '>'
	<xmlcontent>+
	'</' $<name> '>'
	{*}
	}

	rule pi { '<!' <.ident> <.ident> '>' };

	rule empty { '<' <name=ident> <attrs> '/>' {*} };

	token attrs { <attr>* {*} }
	rule attr { $<name>=[<.ident>[':'<.ident>]?] '=' '"' $<value>=[<-["]>+] '"' }

	token ident { <+alnum + [\-]>+ }

	regex content { <-[<]>+ {*} }
	};
	class XML::Actions {
	my $h = -> $/ {
	make [~] gather {
	for $/.chunks{
	if .key eq '~' {
	take .value;
	} else {
	take .value.ast;
	}
	}
	}
	}
	method TOP($/) {
	$h($/);
	}

	method xmlcontent($/, $key) {
	$h($/);
	}

	method node($/) {
	if $<attrs><attr> {
	for $<attrs><attr> -> $a {
	if $a<name> eq "pe:if" {
	make eval(~$a<value>) ?? matching-if($/) !! q[];
	return;
	}
	elsif $a<name> ~~ /^ 'pe:'/ {
	make "Unknown 'pe:' attribute!";
	return;
	}
	}
	}
	$h($/);
	}

	method empty($/) {
	$h($/);
	}

	method attrs($/) {
	$h($/);
	}
	method content($/) {
	make ~$/;
	}

	sub matching-if($/) {
	return $/.ast;
	}
	}

	# RAKUDO: Arguably wrong that this has to be here and not in the class.
	# [perl #65238]
	sub links() {
	return [
	{
	:url<http://ihrd.livejournal.com/>,
	:title("ihrd's blog"),
	:username<ihrd>,
	:time(1240904601)
	},
	{ :url<http://blogs.gurulabs.com/stephen/>,
	:title("Tene's blog"),
	:username<Tene>,
	:time(1240905184),
	},
	{ :url<http://use.perl.org/~masak/journal/>,
	:title("masak's blog"),
	:username<masak>,
	:time(1240905293),
	},
	];
	}


	my $xml = $*IN.slurp;
	my $result = XML.parse($xml, :action(XML::Actions.new()));
	print $result.ast;

	# vim: ft=perl6



	$ cat hitomi-example.xml
	<!DOCTYPE html>
	<html xmlns="http://www.w3.org/1999/xhtml"
	xmlns:pe="http://github.com/masak/hitomi">
	<head>
	<title>Slurp: News</title>
	</head>
	<body class="index">
	<div id="header">
	<h1>News</h1>
	</div>

	<ol pe:if="links">
	<li pe:for="links.reverse -> $link">
	<a href="${$link.url}">${$link.title}</a>
	posted by ${$link.username} at ${strftime('%x %X', $link.time)}
	</li>
	</ol>

	<p><a class="action" href="/submit/">Submit new link</a></p>

	<div id="footer">
	<hr />
	<p class="legalese">© 2009 The Web.pm authors, Artistic License 2.0</p>
	</div>
	</body>
	</html>



	$ perl6 hitomi < hitomi-example.xml
	<!DOCTYPE html>
	<html xmlns="http://www.w3.org/1999/xhtml"
	xmlns:pe="http://github.com/masak/hitomi">
	<head>
	<title>Slurp: News</title>
	</head>
	<body class="index">
	<div id="header">
	<h1>News</h1>
	</div>

	<ol pe:if="links">
	<li pe:for="links.reverse -> $link">
	<a href="${$link.url}">${$link.title}</a>
	posted by ${$link.username} at ${strftime('%x %X', $link.time)}
	</li>
	</ol>

	<p><a class="action" href="/submit/">Submit new link</a></p>

	<div id="footer">
	<hr />
	<p class="legalese">© 2009 The Web.pm authors, Artistic License 2.0</p>
	</div>
	</body>
	</html>