1 // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s
2 // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s -fexperimental-new-constant-interpreter
3
4 struct S { // expected-note {{candidate constructor (the implicit move constructor) not viable: no known conversion from 'int' to 'S &&' for 1st argument}} \
5 // expected-note {{candidate constructor (the implicit copy constructor) not viable: no known conversion from 'int' to 'const S &' for 1st argument}}
6 int e;
7 };
8
9 template<class T>
get_format()10 consteval int get_format() {
11 return nullptr; // expected-error {{cannot initialize return object of type 'int' with an rvalue of type 'std::nullptr_t'}}
12 }
13
14 template<class T>
f(T)15 constexpr S f(T) noexcept {
16 return get_format<T>(); // expected-error {{no viable conversion from returned value of type 'int' to function return type 'S'}}
17 }
18
19 constexpr S x = f(0); // expected-error {{constexpr variable 'x' must be initialized by a constant expression}} \
20 // expected-note {{in instantiation of function template specialization 'f<int>' requested here}}
21