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// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++98 -pedantic-errors -verify=expected %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++11 -pedantic-errors -verify=expected %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++14 -pedantic-errors -verify=expected %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++17 -pedantic-errors -verify=expected %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++20 -pedantic-errors -verify=expected %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++23 -pedantic-errors -verify=expected,since-cxx23 %s
// RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++2c -pedantic-errors -verify=expected,since-cxx23,since-cxx26 %s
namespace cwg2718 { // cwg2718: 2.7
struct B {};
struct D;
void f(B b) {
static_cast<D&>(b);
// expected-error@-1 {{non-const lvalue reference to type 'D' cannot bind to a value of unrelated type 'B'}}
}
struct D : B {};
} // namespace cwg2718
namespace cwg2759 { // cwg2759: 19
#if __cplusplus >= 201103L
struct CStruct {
int one;
int two;
};
struct CEmptyStruct {};
struct CEmptyStruct2 {};
struct CStructNoUniqueAddress {
int one;
[[no_unique_address]] int two;
};
struct CStructNoUniqueAddress2 {
int one;
[[no_unique_address]] int two;
};
union UnionLayout {
int a;
double b;
CStruct c;
[[no_unique_address]] CEmptyStruct d;
[[no_unique_address]] CEmptyStruct2 e;
};
union UnionLayout2 {
CStruct c;
int a;
CEmptyStruct2 e;
double b;
[[no_unique_address]] CEmptyStruct d;
};
union UnionLayout3 {
CStruct c;
int a;
double b;
[[no_unique_address]] CEmptyStruct d;
};
struct StructWithAnonUnion {
union {
int a;
double b;
CStruct c;
[[no_unique_address]] CEmptyStruct d;
[[no_unique_address]] CEmptyStruct2 e;
};
};
struct StructWithAnonUnion2 {
union {
CStruct c;
int a;
CEmptyStruct2 e;
double b;
[[no_unique_address]] CEmptyStruct d;
};
};
struct StructWithAnonUnion3 {
union {
CStruct c;
int a;
CEmptyStruct2 e;
double b;
[[no_unique_address]] CEmptyStruct d;
} u;
};
static_assert(__is_layout_compatible(CStruct, CStructNoUniqueAddress) != bool(__has_cpp_attribute(no_unique_address)), "");
static_assert(__is_layout_compatible(CStructNoUniqueAddress, CStructNoUniqueAddress2) != bool(__has_cpp_attribute(no_unique_address)), "");
static_assert(!__is_layout_compatible(UnionLayout, UnionLayout2), "");
static_assert(!__is_layout_compatible(UnionLayout, UnionLayout3), "");
static_assert(!__is_layout_compatible(StructWithAnonUnion, StructWithAnonUnion2), "");
static_assert(!__is_layout_compatible(StructWithAnonUnion, StructWithAnonUnion3), "");
#endif
} // namespace cwg2759
namespace cwg2789 { // cwg2789: 18
#if __cplusplus >= 202302L
template <typename T = int>
struct Base {
constexpr void g(); // #cwg2789-g1
};
template <typename T = int>
struct Base2 {
constexpr void g() requires true; // #cwg2789-g2
};
template <typename T = int>
struct S : Base<T>, Base2<T> {
constexpr void f();
constexpr void f(this S&) requires true{};
using Base<T>::g;
using Base2<T>::g;
};
void test() {
S<> s;
s.f();
s.g();
// since-cxx23-error@-1 {{call to member function 'g' is ambiguous}}
// since-cxx23-note@#cwg2789-g1 {{candidate function}}
// since-cxx23-note@#cwg2789-g2 {{candidate function}}
}
#endif
}
namespace cwg2798 { // cwg2798: 17
#if __cpp_static_assert >= 202306
struct string {
constexpr string() {
data_ = new char[6]();
__builtin_memcpy(data_, "Hello", 5);
data_[5] = 0;
}
constexpr ~string() { delete[] data_; }
constexpr unsigned long size() const { return 5; };
constexpr const char *data() const { return data_; }
char *data_;
};
struct X {
string s;
};
consteval X f() { return {}; }
static_assert(false, f().s);
// since-cxx26-error@-1 {{static assertion failed: Hello}}
#endif
} // namespace cwg2798
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