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// RUN: %clang_cc1 -std=c++98 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++11 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++14 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++17 %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
// RUN: %clang_cc1 -std=c++2a %s -verify -fexceptions -fcxx-exceptions -pedantic-errors 2>&1 | FileCheck %s
#if __cplusplus <= 201103L
// expected-no-diagnostics
#endif
namespace dr2353 { // dr2353: 9
struct X {
static const int n = 0;
};
// CHECK: FunctionDecl {{.*}} use
int use(X x) {
// CHECK: MemberExpr {{.*}} .n
// CHECK-NOT: non_odr_use
// CHECK: DeclRefExpr {{.*}} 'x'
// CHECK-NOT: non_odr_use
return *&x.n;
}
#pragma clang __debug dump use
// CHECK: FunctionDecl {{.*}} not_use
int not_use(X x) {
// CHECK: MemberExpr {{.*}} .n {{.*}} non_odr_use_constant
// CHECK: DeclRefExpr {{.*}} 'x'
return x.n;
}
#pragma clang __debug dump not_use
// CHECK: FunctionDecl {{.*}} not_use_2
int not_use_2(X *x) {
// CHECK: MemberExpr {{.*}} ->n {{.*}} non_odr_use_constant
// CHECK: DeclRefExpr {{.*}} 'x'
return x->n;
}
#pragma clang __debug dump not_use_2
}
#if __cplusplus >= 201707L
// Otherwise, if the qualified-id std::tuple_size<E> names a complete class
// type **with a member value**, the expression std::tuple_size<E>::value shall
// be a well-formed integral constant expression
namespace dr2386 { // dr2386: 9
struct Bad1 { int a, b; };
struct Bad2 { int a, b; };
} // namespace dr2386
namespace std {
template <typename T> struct tuple_size;
template <> struct std::tuple_size<dr2386::Bad1> {};
template <> struct std::tuple_size<dr2386::Bad2> {
static const int value = 42;
};
} // namespace std
namespace dr2386 {
void no_value() { auto [x, y] = Bad1(); }
void wrong_value() { auto [x, y] = Bad2(); } // expected-error {{decomposes into 42 elements}}
} // namespace dr2386
#endif
namespace dr2387 { // dr2387: 9
#if __cplusplus >= 201402L
template<int> int a = 0;
extern template int a<0>; // ok
template<int> static int b = 0;
extern template int b<0>; // expected-error {{internal linkage}}
template<int> const int c = 0;
extern template const int c<0>; // ok, has external linkage despite 'const'
template<typename T> T d = 0;
extern template int d<int>;
extern template const int d<const int>;
#endif
}
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