phplrt / Phplrt
Licence: mit
PHP Language Recognition Tool
Stars: ✭ 127
Programming Languages
grammar
57 projects
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Introduction
The phplrt is a set of tools for programming languages recognition. The library provides lexer, parser, grammar compiler, library for working with errors, text analysis and so on.
Installation
Phplrt is available as composer repository and can be installed using the following command in a root of your project:
$ composer require phplrt/phplrt
More detailed installation instructions are here.
Quick Start
<?php
use Phplrt\Compiler\Compiler;
$compiler = new Compiler();
$compiler->load(<<<EBNF
%token T_DIGIT \d
%token T_PLUS \+
%token T_MINUS \-
%token T_POW \*
%token T_DIV /
%skip T_WHITESPACE \s+
#Expression
: <T_DIGIT> (Operator() <T_DIGIT>)*
;
#Operator
: <T_PLUS>
| <T_MINUS>
| <T_POW>
| <T_DIV>
;
EBNF);
Execution
echo $compiler->parse('2 + 2');
//
// Output:
//
// <Expression offset="0">
// <T_DIGIT offset="0">2</T_DIGIT>
// <Operator offset="2">
// <T_PLUS offset="2">+</T_PLUS>
// </Operator>
// <T_DIGIT offset="4">2</T_DIGIT>
// </Expression>
//
Compilation
\file_put_contents(__DIR__ . '/grammar.php', (string)$compiler->build());
Documentation
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