for P99_ALLOW P99_AVOID P99_BLK_MARK P99_BLOCK P99_BLOCK_DOCUMENT P99_CHECK_RETURN P99_DECLARE_INHIBIT P99_GUARDED_BLOCK P99_HANDLE_ERRNO P99_INHIBIT P99_INHIBIT_CHECK P99_INVARIANT P99_MARK P99_NOP P99_PROTECT P99_PROTECTED_BLOCK P99_SIMPLE_BLOCKS P99_UNCASE p99_unwind P99_UNWIND p99_unwind_code P99_UNWIND_PROTECT P99_UNWIND_RETURN P99_XCASE P99_XDEFAULT

P99_BLOCK #define P99_BLOCK (   ... )    P99_PREFER(__VA_ARGS__) P99_NOP