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mesa/src/glsl/glcpp
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Kenneth Graunke d65135a766 glcpp/tests: Add a corollary to testcase 073 for testing #elif.
2010-08-04 23:37:19 -07:00
..
tests glcpp/tests: Add a corollary to testcase 073 for testing #elif. 2010-08-04 23:37:19 -07:00
.gitignore glcpp: Add generated source files. 2010-07-28 13:48:32 -07:00
glcpp-lex.c glcpp: Refresh autogenerated lexer and parser. 2010-08-04 15:57:20 -07:00
glcpp-lex.l glcpp: Remove xtalloc wrappers in favor of plain talloc. 2010-08-04 15:57:20 -07:00
glcpp-parse.c glcpp: Refactor HASH_IF and HASH_ELIF expansion to reuse code. 2010-08-04 23:37:18 -07:00
glcpp-parse.h glcpp: Refresh autogenerated lexer and parser. 2010-08-04 15:57:20 -07:00
glcpp-parse.y glcpp: Refactor HASH_IF and HASH_ELIF expansion to reuse code. 2010-08-04 23:37:18 -07:00
glcpp.c glsl2: Conditionally define preprocessor tokens for optional extensions 2010-07-01 20:40:08 -07:00
glcpp.h glcpp: Remove xtalloc wrappers in favor of plain talloc. 2010-08-04 15:57:20 -07:00
Makefile.am glcpp: Remove xtalloc wrappers in favor of plain talloc. 2010-08-04 15:57:20 -07:00
pp.c glcpp: Don't look for backslashes before the beginning of the string. 2010-07-30 13:26:14 -07:00
README glsl2: Move the compiler to the subdirectory it will live in in Mesa. 2010-06-24 15:36:00 -07:00

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.1.30.08.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).