LUAI_TRY
#define LUAI_TRY(L,c,a) if (setjmp(&(c)->b) == 0) { a }
#define LUAI_TRY(L,c,a) \
#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }