Carl Worth
2571415d1a
We support both single-line (//) and multi-line (/* ... */) comments and add a test for this, (trying to stress the rules just a bit by embedding one comment delimiter into a comment delimited with the other style, etc.). To keep the test suite passing we do now discard any output lines from glcpp that consist only of spacing, (in addition to blank lines as previously). We also discard any initial whitespace from gcc output. In neither case should the absence or presence of this whitespace affect correctness.
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. 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).