Carl Worth f6914fd37b Implement #if and friends.
With this change, tests 41 through 49 all pass. (The defined operator
appears to be somehow broken so that test 50 doesn't pass yet.)
2010-05-26 09:33:23 -07:00
2010-05-26 09:33:23 -07:00
2010-05-26 09:32:12 -07:00
2010-05-26 09:32:12 -07:00
2010-05-26 09:33:23 -07:00
2010-05-25 14:40:47 -07:00

glcpp -- GLSL "C" preprocessor

This is a simple preprocessor designed to provide the preprocessing
needs of the GLSL language. The requirements for this preprocessor are
specified in the GLSL 1.30 specification availble from:

http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.08.pdf

This specification is not precise on some semantics, (for example,
#define and #if), defining these merely "as is standard for C++
preprocessors". To fill in these details, I've been using the C99
standard (for which I had a convenient copy) as available from:

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf

Known limitations
-----------------
Macro invocations cannot include embedded newlines.

The __LINE__, __FILE__, and __VERSION__ macros are not yet supported.

The argument of the 'defined' operator cannot yet include enclosing
parentheses.

The #error, #pragma, #extension, #version, and #line macros are not
yet supported.
S
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