mesa/src/compiler/glsl/glcpp
Kenneth Graunke 1f47f78fc3 glcpp: Update tests for new #undef of built-in macro rules.
Ian recently changed the preprocessor to allow this in most GLSL
versions, but not GLSL ES 3.00+.  This patch converts the existing
test that expects a failure to a #version 300 es shader, and adds
a #version 110 shader to make sure that it's allowed.

Fixes 'make check'.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97307
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
Tested-by: Vinson Lee <vlee@freedesktop.org>
2016-08-15 22:55:34 -07:00
..
tests glcpp: Update tests for new #undef of built-in macro rules. 2016-08-15 22:55:34 -07:00
.gitignore glsl: move to compiler/ 2016-01-26 16:08:33 +00:00
glcpp-lex.l glcpp: Fix locations when encounting "#<NEWLINE>". 2016-03-10 11:23:26 -08:00
glcpp-parse.y glcpp: Only disallow #undef of pre-defined macros on GLSL ES >= 3.00 shaders 2016-08-10 16:42:02 -07:00
glcpp.c glsl: reuse main extension table to appropriately restrict extensions 2016-07-23 13:48:04 -04:00
glcpp.h glcpp: Track the actual version instead of just the version_resolved flag 2016-08-10 16:42:02 -07:00
pp.c glsl: reuse main extension table to appropriately restrict extensions 2016-07-23 13:48:04 -04:00
README glsl: move to compiler/ 2016-01-26 16:08:33 +00:00

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 handled according to the GLSL specification
and will not appear in the output.

Known limitations
-----------------
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).