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251e689283
php-parser/grammar
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Nikita Popov 251e689283 Add support for spaceship operator (<=>) [PHP 7] 
Added as Expr\BinaryOp\Spaceship.
2015-03-12 23:13:31 +01:00
..
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 Make names in the parser more descriptive 2014-04-20 23:05:51 +02:00
README.md Port library to use namespaces, with BC for old names 2014-02-06 20:29:35 +01:00
rebuildParser.php Separate parser code from generated data 2014-04-20 00:19:35 +02:00
zend_language_parser.phpy Add support for spaceship operator (<=>) [PHP 7] 2015-03-12 23:13:31 +01:00

README.md

What do all those files mean?

  • 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 Node\Name(..., ..., $attributes)
  • Name::abc is transformed to 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 additionally build Parser/Debug.php and y.output run the script with --debug. If you want to retain the preprocessed grammar pass --keep-tmp-grammar.