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Diffstat (limited to 'vendor/nikic/php-parser/grammar/README.md')
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diff --git a/vendor/nikic/php-parser/grammar/README.md b/vendor/nikic/php-parser/grammar/README.md new file mode 100644 index 0000000..3f1698a --- /dev/null +++ b/vendor/nikic/php-parser/grammar/README.md @@ -0,0 +1,28 @@ +What 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](https://github.com/moriyoshi/kmyacc-forked). +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`. |