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Previously, the YY_USER_ACTION was overwriting the yylloc->source value in every action, (after that value had been carefully set by the handling of the #line directive). Instead, we want to initialize it once in YY_USER_INIT and then not touch it at all in YY_USER_ACTION. |
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| .. | ||
| tests | ||
| .gitignore | ||
| glcpp-lex.c | ||
| glcpp-lex.l | ||
| glcpp-parse.c | ||
| glcpp-parse.h | ||
| glcpp-parse.y | ||
| glcpp.c | ||
| glcpp.h | ||
| Makefile.am | ||
| pp.c | ||
| README | ||
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.1.30.10.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 a draft of the C99 standard as available from: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf Any downstream compiler accepting output from glcpp should be prepared to encounter and deal with the following preprocessor macros: #line #pragma #extension All other macros will be handles according to the GLSL specification and will not appear in the output. Known limitations ----------------- The __LINE__ and __FILE__ macros are not yet supported. 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).