phabel/php-parser
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php-parser/grammar
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nikic a249c002dd Add support for ClassName::class (PHP 5.5)
2013-02-14 21:46:58 +01:00
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analyze.php Remove node analysis from analyze.php and fix some other things about it 2011-08-14 15:52:57 +02:00
kmyacc.php.parser Add information on expected tokens to syntax errors 2013-01-15 17:30:14 +01:00
README.md Turn rebuildParser.php into a CLI script 2012-10-19 19:11:47 +02:00
rebuildParser.php Turn rebuildParser.php into a CLI script 2012-10-19 19:11:47 +02:00
zend_language_parser.phpy Add support for ClassName::class (PHP 5.5) 2013-02-14 21:46:58 +01:00

README.md

What do all those files mean?

  • zend_language_parser.y: Original PHP grammer this parser is based on
  • zend_language_parser.phpy: PHP grammer written in a pseudo language
  • analyze.php: Analyzes the .phpy-grammer and outputs some info about it
  • rebuildParser.php: Preprocesses the .phpy-grammar and builds the parser using kmyacc
  • kmyacc.php.parser: A kmyacc parser prototype file for PHP

.phpy pseudo language

The .phpy file is a normal grammer in kmyacc (yacc) style, with some transformations applied to it:

  • Nodes are created using the syntax Name[..., ...]. This is transformed into new PHPParser_Node_Name(..., ..., $attributes)
  • Name::abc is transformed to PHPParser_Node_Name::abc
  • Some function-like constructs are resolved (see rebuildParser.php for a list)
  • Associative arrays are written as [key: value, ...], which is transformed to array('key' => value, ...)

Building the parser

In order to rebuild the parser, you need moriyoshi's fork of kmyacc. After you compiled/installed it, run the rebuildParser.php script.

By default only the Parser.php is built. If you want to build the Parser/Debug.php and the y.output run the script with --debug. If you want to retain the preprocessed grammar pass --keep-tmp-grammar.