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// P0634R3
// { dg-do compile { target c++20 } }
// (5.2.1) simple-declaration or a function-definition in namespace scope
template<typename T>
T::X fn1 (int);
template<typename T>
T::X fn1 (int)
{
return 42;
}
template<typename T>
T::X v1;
namespace N {
template<typename T>
T::X v2;
}
// (5.2.2) member-declaration
template<typename T>
struct S {
[[noreturn]] T::X fn2 ();
T::X fn3 ();
T::X fn4 () { return 5; }
T::X fn5 () final;
T::X fn6 () = 0;
T::X fn8 () override;
T::X v3;
T::X *v4;
T::X v5[5];
T::X v6 = 0;
T::X v7{0};
T::X v8 : 16;
static constexpr T::X v9 = 0;
typedef T::X T2;
friend T::X fn7<int> ();
static inline T::X v10;
};
// (5.2.3) parameter-declaration in a member-declaration,
// unless that parameter-declaration appears in a default argument
template<typename T>
struct S2 {
friend int fn1<T::X> ();
int fn2 (T::X p);
int fn5 (int = T::X);
};
// (5.2.4) parameter-declaration in a declarator of a function or function
// template declaration whose declarator-id is qualified,
// unless that parameter-declaration appears in a default argument
struct M {
template<typename T>
int fn (T::X);
};
template<typename T>
int M::fn (T::X p) { return p; }
// (5.2.5) parameter-declaration in a lambda-declarator,
// unless that parameter-declaration appears in a default argument
void
fn5 ()
{
auto j = []<typename T>(T::X t, int i) { return i; };
}
// (5.2.6) parameter-declaration of a (non-type) template-parameter
template<typename T, T::X N>
struct S3 { };
// default argument of a type-parameter of a template
template<typename T, typename U = T::X>
struct S4 { };
// type-id of a static_cast, const_cast, reinterpret_cast, or dynamic_cast
template<typename T>
struct S5 {
void fn6 (T::X p)
{
int i = static_cast<T::Y>(p);
i = dynamic_cast<T::Y>(p);
i = reinterpret_cast<T::Y>(p);
i = const_cast<T::Y>(p);
}
};
template<typename T>
void fn7 (typename T::X p)
{
int i = static_cast<T::Y>(p);
i = dynamic_cast<T::Y>(p);
i = reinterpret_cast<T::Y>(p);
i = const_cast<T::Y>(p);
}
// new-type-id
template<typename T>
void
fn8 ()
{
new T::X[10];
}
// defining-type-id
template<typename T>
struct W { typedef int M; };
template<typename T>
struct S6 {
using TT = T::X;
using TT2 = W<T>::M;
};
// trailing-return-type
template<typename T>
struct S7 {
auto fn9() -> W<T>::M;
};
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