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History

Oliver Davies 71dfaca858 composer update		2019-01-24 08:00:03 +00:00
..
parser.template	Update Composer, update everything	2018-11-23 12:29:20 +00:00
php5.y	composer update	2019-01-24 08:00:03 +00:00
php7.y	composer update	2019-01-24 08:00:03 +00:00
README.md	Update Composer, update everything	2018-11-23 12:29:20 +00:00
rebuildParsers.php	Update Composer, update everything	2018-11-23 12:29:20 +00:00
tokens.template	Update Composer, update everything	2018-11-23 12:29:20 +00:00
tokens.y	Update Composer, update everything	2018-11-23 12:29:20 +00:00

README.md

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 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.