diff options
Diffstat (limited to 'compat/macros1.h')
| -rw-r--r-- | compat/macros1.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/compat/macros1.h b/compat/macros1.h index b1137e63..5e3129d5 100644 --- a/compat/macros1.h +++ b/compat/macros1.h @@ -39,3 +39,9 @@ #else # define unreachable() do { __builtin_unreachable(); *(volatile int*)nullptr = 0; } while (0) /* NOLINT(clang-analyzer-core.NullDereference) */ #endif + +#ifdef __cplusplus +# define progn(...) ([&]() -> decltype(auto) { __VA_ARGS__ }()) +# define eval_once(expr) eval_once2(expr, __COUNTER__) +# define eval_once2(expr, ctr) ([&] { [[maybe_unused]] static auto init ## ctr = (((void)(expr)), 0); }()) +#endif |