Chris@0: What do all those files mean? Chris@0: ============================= Chris@0: Chris@0: * `php5.y`: PHP 5 grammar written in a pseudo language Chris@0: * `php7.y`: PHP 7 grammar written in a pseudo language Chris@0: * `tokens.y`: Tokens definition shared between PHP 5 and PHP 7 grammars Chris@0: * `parser.template`: A `kmyacc` parser prototype file for PHP Chris@0: * `tokens.template`: A `kmyacc` prototype file for the `Tokens` class Chris@0: * `rebuildParsers.php`: Preprocesses the grammar and builds the parser using `kmyacc` Chris@0: Chris@0: .phpy pseudo language Chris@0: ===================== Chris@0: Chris@13: The `.y` file is a normal grammar in `kmyacc` (`yacc`) style, with some transformations Chris@0: applied to it: Chris@0: Chris@0: * Nodes are created using the syntax `Name[..., ...]`. This is transformed into Chris@0: `new Name(..., ..., attributes())` Chris@0: * Some function-like constructs are resolved (see `rebuildParsers.php` for a list) Chris@0: Chris@0: Building the parser Chris@0: =================== Chris@0: Chris@0: In order to rebuild the parser, you need [moriyoshi's fork of kmyacc](https://github.com/moriyoshi/kmyacc-forked). Chris@0: After you compiled/installed it, run the `rebuildParsers.php` script. Chris@0: Chris@0: By default only the `Parser.php` is built. If you want to additionally emit debug symbols and create `y.output`, run the Chris@0: script with `--debug`. If you want to retain the preprocessed grammar pass `--keep-tmp-grammar`.