| // Definitions of helper macros for tests of flexible array members. |
| |
| #if __cplusplus < 201102L |
| # define _CAT(x, y) x ## y |
| # define CAT(x, y) _CAT (x, y) |
| |
| // Generate a struct with a unique name containing a bitfield |
| // of size that must evaluate to a non-zero value, otherwise |
| // generate a compiler error. |
| # define ASSERT(expr) \ |
| struct CAT (FAM_Assert, __LINE__) { unsigned asrt: 0 != (expr); } |
| #else |
| // In C++ 11 and beyond, use static_assert. |
| # define ASSERT(expr) static_assert (expr, #expr) |
| #endif |
| |
| // Macro to verify that a flexible array member is allocated |
| // at the very end of the containing struct. |
| #define ASSERT_AT_END(T, m) \ |
| ASSERT (__builtin_offsetof (T, m) == sizeof (T)) |
| |
| typedef __SIZE_TYPE__ size_t; |
