// RUN: %clang_cc1 -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++23 -verify -fsyntax-only %s
enum copy_traits { movable = 1 };
template <int>
struct optional_ctor_base {};
template <typename T>
struct ctor_copy_traits {
// this would produce a c++98-compat warning, which would erroneously get the
// no-matching-function-call error's notes attached to it (or suppress those
// notes if this diagnostic was suppressed, as it is in this case)
static constexpr int traits = copy_traits::movable;
};
template <typename T>
struct optional : optional_ctor_base<ctor_copy_traits<T>::traits> {
template <typename U>
constexpr optional(U&& v);
};
struct A {};
struct XA {
XA(const A&);
};
struct B {};
struct XB {
XB(const B&);
XB(const optional<B>&);
};
struct YB : XB {
using XB::XB;
};
void InsertRow(const XA&, const YB&); // expected-note {{candidate function not viable: no known conversion from 'int' to 'const XA' for 1st argument}}
void ReproducesBugSimply() {
InsertRow(3, B{}); // expected-error {{no matching function for call to 'InsertRow'}}
}
#if __cplusplus >= 202302L
namespace overloadCheck{
template<typename T>
concept AlwaysTrue = true;
struct S {
int f(AlwaysTrue auto) { return 1; }
void f(this S&&, auto) {}
void g(auto) {}
int g(this S&&,AlwaysTrue auto) {return 1;}
int h(AlwaysTrue auto) { return 1; } //expected-note {{previous definition is here}}
int h(this S&&,AlwaysTrue auto) { // expected-error {{class member cannot be redeclared}}
return 1;
}
};
int main() {
int x = S{}.f(0);
int y = S{}.g(0);
}
}
#endif
namespace GH93076 {
template <typename ...a> int b(a..., int); // expected-note-re 3 {{candidate function template not viable: no known conversion from 'int ()' to 'int' for {{.*}} argument}}
int d() {
(void)b<int, int>(0, 0, d); // expected-error {{no matching function for call to 'b'}}
(void)b<int, int>(0, d, 0); // expected-error {{no matching function for call to 'b'}}
(void)b<int, int>(d, 0, 0); // expected-error {{no matching function for call to 'b'}}
return 0;
}
}