Mercurial > hg > CbC > CbC_gcc

comparison gcc/testsuite/g++.dg/cpp1z/decomp37.C @ 131:84e7813d76e9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
parents
children
comparison
equal deleted inserted replaced
111:04ced10e8804 131:84e7813d76e9
1 // { dg-do compile { target c++17 } }
2
3 #include <memory>
4 #include <tuple>
5 #include <string>
6
7 struct X : private std::shared_ptr<int>
8 {
9 std::string fun_payload;
10 };
11
12 template<int N> std::string& get(X& x)
13 {
14 if constexpr(N==0) return x.fun_payload;
15 }
16
17 namespace std {
18 template<> class tuple_size<X> : public std::integral_constant<int, 1> {};
19 template<> class tuple_element<0, X> {public: using type = std::string;};
20 }
21
22 struct X2 : private std::shared_ptr<int>
23 {
24 int fun_payload;
25 template <class T> void get();
26 };
27
28 template<int N> int& get(X2& x)
29 {
30 if constexpr(N==0) return x.fun_payload;
31 }
32
33 namespace std {
34 template<> class tuple_size<X2> : public std::integral_constant<int, 1> {};
35 template<> class tuple_element<0, X2> {public: using type = int;};
36 }
37
38 class X3
39 {
40 double fun_payload;
41 public:
42 template <int N> double& get()
43 {
44 if constexpr(N==0) return fun_payload;
45 }
46 };
47
48 namespace std {
49 template<> class tuple_size<X3> : public std::integral_constant<int, 1> {};
50 template<> class tuple_element<0, X3> {public: using type = double;};
51 }
52
53 int main()
54 {
55 X x;
56 auto& [b1] = x;
57 X2 x2;
58 auto& [b2] = x2;
59 X3 x3;
60 auto& [b3] = x3;
61 }