0,0 → 1,32 |
glcpp -- GLSL "C" preprocessor |
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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: |
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http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.10.pdf |
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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 a draft of |
the C99 standard as available from: |
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http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf |
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Any downstream compiler accepting output from glcpp should be prepared |
to encounter and deal with the following preprocessor macros: |
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#line |
#pragma |
#extension |
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All other macros will be handles according to the GLSL specification |
and will not appear in the output. |
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Known limitations |
----------------- |
The __LINE__ and __FILE__ macros are not yet supported. |
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A file that ends with a function-like macro name as the last |
non-whitespace token will result in a parse error, (where it should be |
passed through as is). |