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// RUN: %clang_cc1 -x c -fsyntax-only -verify -Wenum-compare -Wno-unused-comparison %s
// RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wenum-compare -Wno-unused-comparison %s
// In C enumerators (i.e enumeration constants) have type int (until C23). In
// order to support diagnostics such as -Wenum-compare we pretend they have the
// type of their enumeration.
typedef enum EnumA {
A
} EnumA;
enum EnumB {
B,
B1 = 1,
// In C++ this comparison doesnt warn as enumerators dont have the type of
// their enumeration before the closing brace. We mantain the same behavior
// in C.
B2 = A == B1
};
enum {
C
};
void foo(void) {
enum EnumA a = A;
enum EnumB b = B;
A == B;
// expected-warning@-1 {{comparison of different enumeration types}}
a == (B);
// expected-warning@-1 {{comparison of different enumeration types}}
a == b;
// expected-warning@-1 {{comparison of different enumeration types}}
A > B;
// expected-warning@-1 {{comparison of different enumeration types}}
A >= b;
// expected-warning@-1 {{comparison of different enumeration types}}
a > b;
// expected-warning@-1 {{comparison of different enumeration types}}
(A) <= ((B));
// expected-warning@-1 {{comparison of different enumeration types}}
a < B;
// expected-warning@-1 {{comparison of different enumeration types}}
a < b;
// expected-warning@-1 {{comparison of different enumeration types}}
// In the following cases we purposefully differ from GCC and dont warn
a == C;
A < C;
b >= C;
}
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