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Template::Alloy::Compile
Compile role - allows for compiling the AST to perl code

Template::Alloy::Compile - Compile role - allows for compiling the AST to perl code


NAME

Template::Alloy::Compile - Compile role - allows for compiling the AST to perl code


DESCRIPTION

The Template::Alloy::Compile role allows for taking the AST returned by the Parse role, and translating it into a perl code document. This is in contrast Template::Alloy::Play which executes the AST directly.


TODO

Translate compile_RAWPERL to actually output rather than calling play_RAWPERL.


ROLE METHODS

compile_tree
Takes an AST returned by parse_tree and translates it into perl code using functions stored in the $DIRECTIVES hashref.

A template that looked like the following:


    Foo

    [% GET foo %]

    [% GET bar %]

    Bar

would parse to the following perl code:


    # Generated by Template::Alloy::Compile v1.001 on Thu Jun  7 12:58:33 2007

    # From file /home/paul/bar.tt

    my $blocks = {};

    my $meta   = {};

    my $code   = sub {

        my ($self, $out_ref, $var) = @_;

        $$out_ref .= 'Foo';

        # "GET" Line 2 char 2 (chars 6 to 15)

        $var = $self->play_expr(['foo', 0]);

        $$out_ref .= defined($var) ? $var : $self->undefined_get(['foo', 0]);

        # "GET" Line 3 char 2 (chars 22 to 31)

        $var = $self->play_expr(['bar', 0]);

        $$out_ref .= defined($var) ? $var : $self->undefined_get(['bar', 0]);

        $$out_ref .= 'Bar';

        return 1;

    };

    {

        blocks => $blocks,

        meta   => $meta,

        code   => $code,

    };

As you can see the output is quite a bit more complex than the AST, but under mod_perl conditions, the perl will run faster than playing the AST each time.

compile_expr
Takes an AST variable or expression and returns perl code that can lookup the variable.


AUTHOR

Paul Seamons <paul at seamons dot com>


LICENSE

This module may be distributed under the same terms as Perl itself.

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