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Drawing Mustaches on Perl, for fun and profit
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Template::Mustache - Drawing Mustaches on Perl for fun and profit


version 1.3.1


use Template::Mustache;

# one-shot rendering

print Template::Mustache->render(
    "Hello {{planet}}", 

# compile and re-use template

my $mustache = Template::Mustache->new(
    template => "Hello {{planet}}", 

print $mustache->render( { planet => "World!" } );


Template::Mustache is an implementation of the fabulous Mustache templating language for Perl.

This version of Template::Mustache conforms to v1.1.3 of the Mustache specs.

Templates can be compiled and rendered on the spot via the use of render called as a class method.

print Template::Mustache->render(
    "Hello {{planet}}", 

If you are considering re-using the same template many times, it's recommended to create a Template::Mustache object instead, which will compile the template only once, and allow to render it with different contexts.

my $mustache = Template::Mustache->new(
    template => "Hello {{planet}}", 

print $mustache->render( { planet => "World!" } );


new( %arguments )

my $mustache = Template::Mustache->new(
    template   => "Hello {{planet}}",
    delimiters => [ qw/ ! ! / ],



  • template => $string

    A Mustache template.

  • template_path => $path

    Instead of template, a template_path can be provided to read the template and the partials from the fielsystem instead. See the method template_path to see how this works.

  • partials_path => $path

    An optional filesystem path from which to gather partial templates.

  • delimiters => [ $opening_tag, $closing_tag ]

    An optional arrayref holding the pair of delimiters used by the template. Defaults to {{ }}.

  • context => $context

    Context to use when rendering if not provided as a parameter to render. Defaults to the object itself.

  • partials => $partials

    An optional hashref of partials to assign to the object. See the method partials for more details on its format.

    By default, if partials_path (or template_path is defined, the template will try to resolve the partials as filenames with the file extension .mustache relative to that path.

    my $mustache = Template::Mustache->new( 
        partials => './root',
        template => '{{ > ./my/partial }}',  # => file ./root/my/partial.mustache

render( $context )

print $mustache->render( $context );

Returns the rendered template, given the optionally provided context. Uses the object's context attribute if not provided.


as a hashref

Template::Mustache->render( 'Hello {{ thing }}', { thing => 'World!' } );

If the value is a coderef, it will be invoked to generate the value to be inserted in the template.

    'it is {{ time }}', 
    { time => sub { scalar localtime } } 

If you want the value returned by the coderef to be interpolated as a Mustache template, a helper function is passed as the last argument to the coderef.

    'hello {{ place }}', 
        place => sub { pop->('{{ planet }}') },
        planet => 'World',

The two previous interpolations work both for {{variable}} definitions, but also for {{#section}}s.

print Template::Mustache->render(
    'I am {{#obfuscated}}resu{{/obfuscated}}',
        obfuscated   => sub { pop->('{{'.reverse(shift).'}}') },
        user         => '({{logged_in_as}})',
        logged_in_as => 'Sam',
);  # => 'I am (Sam)'

as an arrayref

Template::Mustache->render( 'Hello {{ 1 }}', [ 'Earth', 'World!' ] );
# => 'Hello World!

as an object

my $object = Something->new( ... );  

Template::Mustache->render( 'Hello {{ thing }}', $object );  # thing resolves to $object->thing

as a scalar

Template::Mustache->render( 'Hello {{ . }}', 'World!' );

no context

If no context is provided, it will default to the mustache object itself. Which allows for definining templates as subclasses of Template::Mustache.

package My::Template;
use Moo;
extends 'Template::Mustache';

sub template  { 'Hello {{ planet }}!' }

sub planet { 'World' }

# later on
My::Template->new->render; # => Hello World!

multi-level variable

If the variable to be rendered is multi-level (e.g.,, it is resolved recursively on the context.

# $foo->bar returns `{ baz => [ 'quux' ] }`

Template::Mustache->render( '{{ bar.baz.0 }}', $foo );  # => 'quux'

render( $template, $context, $partials )

print Template::Mustache->render( $template, $context, $partials );

# equivalent to
    template => $template, partials => $partials 
)->render( $context );

If invoked as a class method, render takes in the mustache template, and an optional context and set of partials.

To pass in partials without a context, set the context to undef.

print Template::Mustache->render( $template, undef, $partials );

template( $template )

Accessor to the template attribute.

template_path( $path )

Accessor to the template_path attribute. If this attribute is set, the template will be set to the content of the provided file (if $path is a directory, the file is assumed to be the Mustache.mustache file local to that directory).

partials_path( $path )

Accessor the partials_path attribute. If partials were not given as part of the object construction, when encountered partials will be attempted to be read from that directory. The filename for a partial is its name with .mustache appended to it.

If template_path is defined, partials_path defaults to it.

context( $context )

Accessor to the context attribute.

delimiters( [ $opening_tag, $closing_tag ] )

Accessor to the delimiters attribute.


my $tree = $mustache->parsed;

Returns the Template::Mustache::Token::Template object representing the parsed template.


Returns the instance of Template::Mustache::Parser used by the object.

partials( { partial_name => $partial, ... } )

my $mustache = Template::Mustache->new(
    template => "{{> this }}",
    partials => { this => 'partials rock!' },

print $mustache->render; # => partials rock!

Add partial templates to the object.

Partial values can be strings holding Mustache templates;

A coderef can also be set instead of a hashref. In that case, partial templates will be generated by invoking that sub with the name of the partial as its argument.

my $mustache = Template::Mustache->new(
    template => "{{> this }} and {{> that }}",
    partials => sub { "a little bit of " . shift }



print $Template::Mustache::GRAMMAR;

The Parse::RecDescent grammar used to parse Mustache templates.




This software is copyright (c) 2018, 2017, 2016, 2015, 2011 by Pieter van de Bruggen.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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