glsl-syntax - abandoned

Copperbox revision 2714.

I've partially updated the syntax to make better distinction between declarations and declarators, but I've decided to abandon the project again. Basically I never had a concrete use for a GLSL parser and I was using the project to learn something about the GLSL language. However, the C style syntax for declarations is so horrible that writing a parser is no fun and hardly instructive. My time is better spent on other things.