1Pegex(3)              User Contributed Perl Documentation             Pegex(3)
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NAME

6       Pegex - Acmeist PEG Parser Framework
7

VERSION

9       This document describes Pegex version 0.75.
10

SYNOPSIS

12           use Pegex;
13           my $result = pegex($grammar)->parse($input);
14
15       or with options:
16
17           use Pegex;
18           use ReceiverClass;
19           my $parser = pegex($grammar, 'ReceiverClass');
20           my $result = $parser->parse($input);
21
22       or more explicitly:
23
24           use Pegex::Parser;
25           use Pegex::Grammar;
26           my $pegex_grammar = Pegex::Grammar->new(
27               text => $grammar,
28           );
29           my $parser = Pegex::Parser->new(
30               grammar => $pegex_grammar,
31           );
32           my $result = $parser->parse($input);
33
34       or customized explicitly:
35
36           {
37               package MyGrammar;
38               use Pegex::Base;
39               extends 'Pegex::Grammar';
40               has text => "your grammar definition text goes here";
41               has receiver => "MyReceiver";
42           }
43           {
44               package MyReceiver;
45               use base 'Pegex::Receiver';
46               got_some_rule { ... }
47               got_other_rule { ... }
48           }
49           use Pegex::Parser;
50           my $parser = Pegex::Parser->new(
51               grammar => MyGrammar->new,
52               receiver => MyReceiver->new,
53           );
54           $parser->parse($input);
55           my $result = $parser->receiver->data;
56

DESCRIPTION

58       Pegex is an Acmeist parser framework. It allows you to easily create
59       parsers that will work equivalently in lots of programming languages!
60       The inspiration for Pegex comes from the parsing engine upon which the
61       postmodern programming language Perl 6 is based on. Pegex brings this
62       beauty to the other justmodern languages that have a normal regular
63       expression engine available.
64
65       Pegex gets it name by combining Parsing Expression Grammars (PEG), with
66       Regular Expressions (Regex). That's actually what Pegex does.
67
68       PEG is the cool new way to elegantly specify recursive descent
69       grammars. The Perl 6 language is defined in terms of a self modifying
70       PEG language called Perl 6 Rules. Regexes are familiar to programmers
71       of most modern programming languages. Pegex defines a simple PEG
72       syntax, where all the terminals are regexes. This means that Pegex can
73       be quite fast and powerful.
74
75       Pegex attempts to be the simplest way to define new (or old) Domain
76       Specific Languages (DSLs) that need to be used in several programming
77       languages and environments. Things like JSON, YAML, Markdown etc. It
78       also great for writing parsers/compilers that only need to work in one
79       language.
80

USAGE

82       The "Pegex.pm" module itself (this module) is just a trivial way to use
83       the Pegex framework. It is only intended for the simplest of uses.
84
85       This module exports a single function, "pegex", which takes a Pegex
86       grammar string as input. You may also pass a receiver class name after
87       the grammar.
88
89           my $parser = pegex($grammar, 'MyReceiver');
90
91       The "pegex" function returns a Pegex::Parser object, on which you would
92       typically call the "parse()" method, which (on success) will return a
93       data structure of the parsed data.
94
95       See Pegex::API for more details.
96

PEGEX DEBUGGING

98       Pegex (Pegex::Parser) has many easy to use methods of debugging. See
99       the "Debugging" section of Pegex::Parser for details.
100

SEE ALSO

102       •   Pegex::Overview
103
104       •   Pegex::API
105
106       •   Pegex::Syntax
107
108       •   Pegex::Tutorial
109
110       •   Pegex::Resources
111
112       •   Pegex::Parser
113
114       •   <http://github.com/ingydotnet/pegex-pm>
115
116       •   <irc://freenode.net#pegex>
117

AUTHOR

119       Ingy döt Net <ingy@cpan.org>
120

122       Copyright 2010-2020. Ingy döt Net.
123
124       This program is free software; you can redistribute it and/or modify it
125       under the same terms as Perl itself.
126
127       See <http://www.perl.com/perl/misc/Artistic.html>
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131perl v5.34.0                      2022-01-21                          Pegex(3)
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