1 // RUN: %clang_cc1 -std=c++2a %s -include %s -verify
2 
3 #ifndef INCLUDED
4 #define INCLUDED
5 
6 #pragma clang system_header
7 namespace std {
8   namespace chrono {
9     struct day{};
10     struct year{};
11   }
12   constexpr chrono::day operator"" d(unsigned long long d) noexcept;
13   constexpr chrono::year operator"" y(unsigned long long y) noexcept;
main()14 }
15 
16 #else
17 
18 using namespace std;
19 chrono::day dec_d = 5d;
20 chrono::day oct_d = 05d;
21 chrono::day bin_d = 0b011d;
22 // expected-error@+3{{no viable conversion from 'int' to 'chrono::day'}}
23 // expected-note@9{{candidate constructor (the implicit copy constructor)}}
24 // expected-note@9{{candidate constructor (the implicit move constructor)}}
25 chrono::day hex_d = 0x44d;
26 chrono::year y  = 10y;
27 
28 namespace ignore_class_udl_for_numeric_literals {
29   struct A { constexpr A(const char*) {} };
30   struct B { constexpr B(char); };
31   struct C { constexpr C(int); };
32   template<A> void operator""_a();
33   template<B> void operator""_b();
34   template<C> void operator""_c();
35   void test_class_udl_1() {
36     1_a; // expected-error {{no matching}}
37     1_b; // expected-error {{no matching}}
38     1_c; // expected-error {{no matching}}
39     "1"_a;
40     "1"_b; // expected-error {{no matching}}
41     "1"_c; // expected-error {{no matching}}
42   }
43   template<char...> void operator""_a();
44   template<char...> void operator""_b();
45   template<char...> void operator""_c();
46   void test_class_udl_2() {
47     1_a;
48     // FIXME: The standard appears to say these two are ambiguous!
49     1_b;
50     1_c;
51     "1"_a;
52     "1"_b; // expected-error {{no matching}}
53     "1"_c; // expected-error {{no matching}}
54   }
55 }
56 #endif
57