1 glcpp -- GLSL "C" preprocessor 2 3 This is a simple preprocessor designed to provide the preprocessing 4 needs of the GLSL language. The requirements for this preprocessor are 5 specified in the GLSL 1.30 specification availble from: 6 7 http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.10.pdf 8 9 This specification is not precise on some semantics, (for example, 10 #define and #if), defining these merely "as is standard for C++ 11 preprocessors". To fill in these details, I've been using a draft of 12 the C99 standard as available from: 13 14 http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf 15 16 Any downstream compiler accepting output from glcpp should be prepared 17 to encounter and deal with the following preprocessor macros: 18 19 #line 20 #pragma 21 #extension 22 23 All other macros will be handles according to the GLSL specification 24 and will not appear in the output. 25 26 Known limitations 27 ----------------- 28 The __LINE__ and __FILE__ macros are not yet supported. 29 30 A file that ends with a function-like macro name as the last 31 non-whitespace token will result in a parse error, (where it should be 32 passed through as is).
