You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
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 grammar in `kmyacc` (`yacc`) style, with some transformationsapplied 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](https://github.com/moriyoshi/kmyacc-forked). * The `--debug` option enables emission of debug symbols and creates the `y.output` file. * The `--keep-tmp-grammar` option preserves the preprocessed grammar file.
|
