DownloadWhat do all those files mean?
* php5.y : PHP 5 grammar written in a pseudo language
* php7.y : PHP 7 grammar written in a pseudo language
* tokens.y : Tokens definition shared between PHP 5 and PHP 7 grammars
* parser.template : A kmyacc parser prototype file for PHP
* tokens.template : A kmyacc prototype file for the Tokens class
* 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.
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