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comparison gcc/testsuite/g++.dg/concepts/fn9.C @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 84e7813d76e9
comparison
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68:561a7518be6b 111:04ced10e8804
1 // { dg-do run }
2 // { dg-options "-std=c++17 -fconcepts" }
3
4 #include <cassert>
5
6 template<typename T>
7 concept bool Class() { return __is_class(T); }
8
9 template<typename T>
10 concept bool Empty() { return Class<T>() and __is_empty(T); }
11
12 template<Class T> int f(T) { return 1; }
13 template<Empty T> int f(T) { return 2; }
14
15 struct S {
16 template<Class T> int f(T) { return 1; }
17 template<Empty T> int f(T) { return 2; }
18 } s;
19
20 struct X { } x;
21 struct Y { X x; } y;
22
23 int main () {
24 auto p1 = &f<X>; // Empty f
25 assert(p1(x) == 2);
26
27 auto p2 = &f<Y>; // Class f
28 assert(p2(y) == 1);
29
30 auto p3 = &S::template f<X>; // Empty f
31 assert((s.*p3)(x) == 2);
32
33 auto p4 = &S::template f<Y>; // Empty f
34 assert((s.*p4)(y) == 1);
35 }