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PHP-Parser/grammar
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Nikita Popov 6478c5ac53 Fix PropertyHook::getStmts() for set hook 
Produce the correct desugaring if the propertyName attribute is
set, and set it in the parser. Otherwise throw an exception.

Fixes #1053.
2024-12-27 16:56:00 +01:00
..
parser.template
Avoid cyclic reference in parser
2024-02-21 21:13:45 +01:00
php.y
Fix PropertyHook::getStmts() for set hook
2024-12-27 16:56:00 +01:00
phpyLang.php
Avoid cyclic reference in parser
2024-02-21 21:13:45 +01:00
README.md
Update grammar/README.md (#877)
2022-08-30 20:54:07 +02:00
rebuildParsers.php
Also format the grammar directory
2022-08-29 21:56:41 +02:00

README.md

What do all those files mean?

  • php.y: PHP 5-8 grammar written in a pseudo language
  • parser.template: A kmyacc parser prototype file for PHP
  • rebuildParsers.php: Preprocesses the grammar and builds the parser using kmyacc

.phpy pseudo language

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

  • Nodes are created using the syntax Name[..., ...]. This is transformed into new Name(..., ..., attributes())
  • Some function-like constructs are resolved (see rebuildParsers.php for a list)

Building the parser

Run php grammar/rebuildParsers.php to rebuild the parsers. Additional options:

  • The KMYACC environment variable can be used to specify an alternative kmyacc binary. By default the phpyacc dev dependency will be used. To use the original kmyacc, you need to compile moriyoshi's fork.
  • The --debug option enables emission of debug symbols and creates the y.output file.
  • The --keep-tmp-grammar option preserves the preprocessed grammar file.