1 // RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s
2
Fun()3 consteval int Fun() { return; } // expected-error {{non-void consteval function 'Fun' should return a value}}
4
FunT1()5 template <typename T> consteval int FunT1() { return; } // expected-error {{non-void consteval function 'FunT1' should return a value}}
FunT2()6 template <typename T> consteval int FunT2() { return 0; }
FunT2()7 template <> consteval int FunT2<double>() { return 0; }
FunT2()8 template <> consteval int FunT2<int>() { return; } // expected-error {{non-void consteval function 'FunT2<int>' should return a value}}
9
10 enum E {};
11
operator +(E,E)12 constexpr E operator+(E,E) { return; } // expected-error {{non-void constexpr function 'operator+' should return a value}}
operator +(E,E)13 consteval E operator+(E,E) { return; } // expected-error {{non-void consteval function 'operator+' should return a value}}
operator -(E,E)14 template <typename T> constexpr E operator-(E,E) { return; } // expected-error {{non-void constexpr function 'operator-' should return a value}}
operator -(E,E)15 template <typename T> consteval E operator-(E,E) { return; } // expected-error {{non-void consteval function 'operator-' should return a value}}
16
17 template <typename T> constexpr E operator*(E,E);
18 template <typename T> consteval E operator/(E,E);
19 template <> constexpr E operator*<int>(E,E) { return; } // expected-error {{non-void constexpr function 'operator*<int>' should return a value}}
20 template <> consteval E operator/<int>(E,E) { return; } // expected-error {{non-void consteval function 'operator/<int>' should return a value}}
21
no_return()22 consteval void no_return() {}
with_return()23 consteval void with_return() { return; }
with_return_void()24 consteval void with_return_void() { return void(); }
use_void_fn()25 void use_void_fn() {
26 no_return();
27 with_return();
28 with_return_void();
29 }
30