1 // RUN: %clang_cc1 -std=c++2a -verify -Wno-defaulted-function-deleted -include %s %s
2 //
3 // RUN: %clang_cc1 -std=c++2a -emit-pch %s -o %t.pch
4 // RUN: %clang_cc1 -std=c++2a -include-pch %t.pch %s -verify
5 //
6 // RUN: %clang_cc1 -std=c++2a -emit-pch -fpch-instantiate-templates %s -o %t.pch
7 // RUN: %clang_cc1 -std=c++2a -include-pch %t.pch %s -verify
8 
9 // expected-no-diagnostics
10 
11 #ifndef INCLUDED
12 #define INCLUDED
13 
14 namespace std {
15   struct strong_ordering {
16     int n;
operator intstd::strong_ordering17     constexpr operator int() const { return n; }
18     static const strong_ordering equal, greater, less;
19   };
20   constexpr strong_ordering strong_ordering::equal = {0};
21   constexpr strong_ordering strong_ordering::greater = {1};
22   constexpr strong_ordering strong_ordering::less = {-1};
23 }
24 
25 // Ensure that we can round-trip DefaultedFunctionInfo through an AST file.
26 namespace LookupContext {
27   struct A {};
28 
29   namespace N {
f()30     template <typename T> auto f() {
31       bool operator==(const T &, const T &);
32       bool operator<(const T &, const T &);
33       struct B {
34         T a;
35         std::strong_ordering operator<=>(const B &) const = default;
36       };
37       return B();
38     }
39   }
40 }
41 
42 #else
43 
44 namespace LookupContext {
45   namespace M {
46     bool operator<=>(const A &, const A &) = delete;
47     bool operator==(const A &, const A &) = delete;
48     bool operator<(const A &, const A &) = delete;
49     bool cmp = N::f<A>() < N::f<A>();
50   }
51 }
52 
53 #endif
54