diff options
| author | Tim Rowley <[email protected]> | 2017-02-27 17:59:37 -0800 |
|---|---|---|
| committer | Tim Rowley <[email protected]> | 2017-03-20 18:04:53 -0500 |
| commit | 2f513d8d8304761a4e0dd483fa0fa4a82efd3aaa (patch) | |
| tree | 8f65a4ac74b0c9a978dfcf32bf41c43038db4cea /src | |
| parent | 0b066b2bf3845f47b6294633266ee2aa64403f13 (diff) | |
swr: [rasterizer core] Allow no arguments to SWR_INVALID macro
Turns out this is somewhat tricky with gcc/g++.
Reviewed-by: Bruce Cherniak <[email protected]>
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/swr/rasterizer/common/swr_assert.h | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/gallium/drivers/swr/rasterizer/common/swr_assert.h b/src/gallium/drivers/swr/rasterizer/common/swr_assert.h index 89ae10efb23..a9e5bb4e77f 100644 --- a/src/gallium/drivers/swr/rasterizer/common/swr_assert.h +++ b/src/gallium/drivers/swr/rasterizer/common/swr_assert.h @@ -165,7 +165,19 @@ void SwrTrace( #define SWR_REL_TRACE(_fmtstr, ...) _SWR_TRACE(_fmtstr, ##__VA_ARGS__) // SWR_INVALID is always enabled -#define SWR_INVALID(fmtStr, ...) _SWR_INVALID(false, fmtStr, ##__VA_ARGS__) +// Funky handling to allow 0 arguments with g++/gcc +// This is needed because you can't "swallow commas" with ##_VA_ARGS__ unless +// there is a first argument to the macro. So having a macro that can optionally +// accept 0 arguments is tricky. +#define _SWR_INVALID_0() _SWR_INVALID(false) +#define _SWR_INVALID_1(...) _SWR_INVALID(false, ##__VA_ARGS__) +#define _SWR_INVALID_VARGS_(_10, _9, _8, _7, _6, _5, _4, _3, _2, _1, N, ...) N +#define _SWR_INVALID_VARGS(...) _SWR_INVALID_VARGS_(__VA_ARGS__, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1) +#define _SWR_INVALID_VARGS_0() 1, 2, 3, 4, 5, 6, 7, 9, 9, 10 +#define _SWR_INVALID_CONCAT_(a, b) a##b +#define _SWR_INVALID_CONCAT(a, b) _SWR_INVALID_CONCAT_(a, b) +#define SWR_INVALID(...) \ + _SWR_INVALID_CONCAT(_SWR_INVALID_,_SWR_INVALID_VARGS(_SWR_INVALID_VARGS_0 __VA_ARGS__ ()))(__VA_ARGS__) #endif #endif // C++ |