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 grammer 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
In order to rebuild the parser, you need moriyoshi's fork of kmyacc.
After you compiled/installed it, run the rebuildParsers.php script.
By default only the Parser.php is built. If you want to additionally emit debug symbols and create y.output , run the
script with --debug . If you want to retain the preprocessed grammar pass --keep-tmp-grammar .
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