NAME

    Pegex - Acmeist PEG Parser Framework

VERSION

    This document describes Pegex version 0.73.

SYNOPSIS

        use Pegex;
        my $result = pegex($grammar)->parse($input);

    or with options:

        use Pegex;
        use ReceiverClass;
        my $parser = pegex($grammar, 'ReceiverClass');
        my $result = $parser->parse($input);

    or more explicitly:

        use Pegex::Parser;
        use Pegex::Grammar;
        my $pegex_grammar = Pegex::Grammar->new(
            text => $grammar,
        );
        my $parser = Pegex::Parser->new(
            grammar => $pegex_grammar,
        );
        my $result = $parser->parse($input);

    or customized explicitly:

        {
            package MyGrammar;
            use Pegex::Base;
            extends 'Pegex::Grammar';
            has text => "your grammar definition text goes here";
            has receiver => "MyReceiver";
        }
        {
            package MyReceiver;
            use base 'Pegex::Receiver';
            got_some_rule { ... }
            got_other_rule { ... }
        }
        use Pegex::Parser;
        my $parser = Pegex::Parser->new(
            grammar => MyGrammar->new,
            receiver => MyReceiver->new,
        );
        $parser->parse($input);
        my $result = $parser->receiver->data;

DESCRIPTION

    Pegex is an Acmeist parser framework. It allows you to easily create
    parsers that will work equivalently in lots of programming languages!
    The inspiration for Pegex comes from the parsing engine upon which the
    postmodern programming language Perl 6 is based on. Pegex brings this
    beauty to the other justmodern languages that have a normal regular
    expression engine available.

    Pegex gets it name by combining Parsing Expression Grammars (PEG), with
    Regular Expressions (Regex). That's actually what Pegex does.

    PEG is the cool new way to elegantly specify recursive descent
    grammars. The Perl 6 language is defined in terms of a self modifying
    PEG language called Perl 6 Rules. Regexes are familiar to programmers
    of most modern programming languages. Pegex defines a simple PEG
    syntax, where all the terminals are regexes. This means that Pegex can
    be quite fast and powerful.

    Pegex attempts to be the simplest way to define new (or old) Domain
    Specific Languages (DSLs) that need to be used in several programming
    languages and environments. Things like JSON, YAML, Markdown etc. It
    also great for writing parsers/compilers that only need to work in one
    language.

USAGE

    The Pegex.pm module itself (this module) is just a trivial way to use
    the Pegex framework. It is only intended for the simplest of uses.

    This module exports a single function, pegex, which takes a Pegex
    grammar string as input. You may also pass a receiver class name after
    the grammar.

        my $parser = pegex($grammar, 'MyReceiver');

    The pegex function returns a Pegex::Parser object, on which you would
    typically call the parse() method, which (on success) will return a
    data structure of the parsed data.

    See Pegex::API for more details.

PEGEX DEBUGGING

    Pegex (Pegex::Parser) has many easy to use methods of debugging. See
    the "Debugging" section of Pegex::Parser for details.

SEE ALSO

      * Pegex::Overview

      * Pegex::API

      * Pegex::Syntax

      * Pegex::Tutorial

      * Pegex::Resources

      * Pegex::Parser

      * http://github.com/ingydotnet/pegex-pm

      * irc://freenode.net#pegex

AUTHOR

    Ingy döt Net <ingy@cpan.org>

COPYRIGHT AND LICENSE

    Copyright 2010-2020. Ingy döt Net.

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

    See http://www.perl.com/perl/misc/Artistic.html