_Pragma-in-macro-arg.c [plain text]
#define A(desc) _Pragma("clang diagnostic push") _Pragma("clang diagnostic ignored \"-Wparentheses\"") _Pragma("clang diagnostic pop")
#define B(desc) A(desc)
B(_Pragma("clang diagnostic ignored \"-Wparentheses\""))
#define EMPTY(x)
#define INACTIVE(x) EMPTY(x)
#define ID(x) x
#define ACTIVE(x) ID(x)
INACTIVE(_Pragma("clang diagnostic ignored \"-Wconversion\""))
#define IGNORE_CONV _Pragma("clang diagnostic ignored \"-Wconversion\"") _Pragma("clang diagnostic ignored \"-Wconversion\"")
INACTIVE(IGNORE_CONV)
#define IGNORE_POPPUSH(Pop, Push, W, D) Push W D Pop
IGNORE_POPPUSH(_Pragma("clang diagnostic pop"), _Pragma("clang diagnostic push"),
_Pragma("clang diagnostic ignored \"-Wconversion\""), int q = (double)1.0);
int x1 = (double)1.0;
ACTIVE(_Pragma) ("clang diagnostic ignored \"-Wconversion\"")) expected-error {{expected identifier or '('}} expected-error {{expected ')'}} expected-note {{to match this '('}}
ACTIVE(IGNORE_CONV)
int x2 = (double)1.0;