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.