phabel/php-parser
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3701e02d32
php-parser/grammar
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nikic 3701e02d32 Use inject-once approach for lexer 
Now the lexer is injected only once when creating the parser. Instead of

    $parser = new PHPParser_Parser;
    $parser->parse(new PHPParser_Lexer($code));
    $parser->parse(new PHPParser_Lexer($code2));

you write:

    $parser = new PHPParser_Parser(new PHPParser_Lexer);
    $parser->parse($code);
    $parser->parse($code2);
2012-05-04 10:16:46 +02:00
..
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 Use inject-once approach for lexer 2012-05-04 10:16:46 +02:00
README.md Do not distribute debug parser anymore 2011-11-27 21:48:34 +01:00
rebuildParser.php Fix parsing of integers that overflow into floats 2012-01-15 16:54:48 +01:00
zend_language_parser.phpy Fix line numbers for some list structures 2012-04-19 00:52:44 +02:00

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(..., ..., $line, $docComment)
  • 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 file.

By default only the Parser.php is built. If you want to build the Parser/Debug.php and the y.output file you need to call the file with the debug option: rebuildParser.php?debug.