third_party_mesa3d

Files

Carl Worth 7ab1c7f792 glcpp: Fix so that trailing punctuation does not prevent macro expansion

The trick here is that flex always chooses the rule that matches the most
text. So with a input text of "two:" which we want to be lexed as an
IDENTIFIER token "two" followed by an OTHER token ":" the previous OTHER
rule would match longer as a single token of "two:" which we don't want.

We prevent this by forcing the OTHER pattern to never match any
characters that appear in other constructs, (no letters, numbers, #,
_, whitespace, nor any punctuation that appear in CPP operators).

Fixes bug #44764:

	GLSL preprocessor doesn't replace defines ending with ":"
	https://bugs.freedesktop.org/show_bug.cgi?id=44764

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

NOTE: This is a candidate for stable release branches.

2012-02-02 12:05:21 -08:00

tests

glcpp: Add new test showing bug where a trailing ':' prevents macro expansion

2012-02-02 12:05:21 -08:00

.gitignore

Revert "automake: src/glsl and src/glsl/glcpp"

2012-01-31 21:33:59 -05:00

glcpp-lex.l

glcpp: Fix so that trailing punctuation does not prevent macro expansion

2012-02-02 12:05:21 -08:00

glcpp-parse.y

mesa: rename the AMD_conservative_depth extension flag to ARB

2011-11-22 20:56:50 +01:00

glcpp.c

glsl: Silence several "warning: unused parameter"

2011-09-09 12:01:50 -07:00

glcpp.h

Convert everything from the talloc API to the ralloc API.

2011-01-31 10:17:09 -08:00

pp.c

Convert everything from the talloc API to the ralloc API.

2011-01-31 10:17:09 -08:00

README

Revert "glcpp: Demote "macro redefined" from an error to a warning"

2011-01-29 08:21:05 +10:00

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.1.30.10.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).