diff options
| -rw-r--r-- | src/util/macros.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/util/macros.h b/src/util/macros.h index 40ebf02..ff37a7d 100644 --- a/src/util/macros.h +++ b/src/util/macros.h @@ -75,6 +75,20 @@ do { \ #define unreachable(str) #endif +/** + * Assume macro. Useful for expressing our assumptions to the compiler, + * typically for purposes of silencing warnings. + */ +#ifdef HAVE___BUILTIN_UNREACHABLE +#define assume(expr) ((expr) ? ((void) 0) \ + : (assert(!"assumption failed"), \ + __builtin_unreachable())) +#elif _MSC_VER >= 1200 +#define assume(expr) __assume(expr) +#else +#define assume(expr) assert(expr) +#endif + #ifdef HAVE_FUNC_ATTRIBUTE_FLATTEN #define FLATTEN __attribute__((__flatten__)) #else |