1 // RUN: %clang_cc1 -std=c++1z -verify %s -triple x86_64-unknown-unknown
2
3 struct S;
4
5 typedef void Nothrow() noexcept;
6 typedef void Throw();
7
8 Nothrow *a;
9 Throw *b;
10 Nothrow S::*c;
11 Throw S::*d;
12
test()13 void test() {
14 a = b; // expected-error {{incompatible function pointer types assigning to 'Nothrow *' (aka 'void (*)() noexcept') from 'Throw *' (aka 'void (*)()')}}
15 b = a;
16 c = d; // expected-error {{assigning to 'Nothrow S::*' from incompatible type 'Throw S::*': different exception specifications}}
17 d = c;
18
19 // Function pointer conversions do not combine properly with qualification conversions.
20 // FIXME: This seems like a defect.
21 Nothrow *const *pa = b; // expected-error {{cannot initialize}}
22 Throw *const *pb = a; // expected-error {{cannot initialize}}
23 Nothrow *const S::*pc = d; // expected-error {{cannot initialize}}
24 Throw *const S::*pd = c; // expected-error {{cannot initialize}}
25 }
26
27 // ... The result is a pointer to the function.
28 void f() noexcept;
29 constexpr void (*p)() = &f;
30 static_assert(f == p);
31
32 struct S { void f() noexcept; };
33 constexpr void (S::*q)() = &S::f;
34 static_assert(q == &S::f);
35
36
37 namespace std_example {
38 void (*p)();
39 void (**pp)() noexcept = &p; // expected-error {{cannot initialize a variable of type 'void (**)() noexcept' with an rvalue of type 'void (**)()'}}
40
41 struct S { typedef void (*p)(); operator p(); }; // expected-note {{candidate}}
42 void (*q)() noexcept = S(); // expected-error {{no viable conversion from 'std_example::S' to 'void (*)() noexcept'}}
43 }
44