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comparison gcc/testsuite/g++.dg/concepts/explicit-spec1.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 C() { return __is_class(T); }
8
9 template<typename T>
10 concept bool D() { return C<T>() && __is_empty(T); }
11
12 struct X { } x;
13 struct Y { int n; } y;
14
15 template<typename T> void g(T) { } // #1
16 template<C T> void g(T) { } // #2
17 template<D T> void g(T) { } // #3
18
19 int called;
20
21 template<> void g(int) { called = 1; } // Specialization of #1
22 template<> void g<X>(X) { called = 2; } // Specialization of #3
23 template<> void g(Y) { called = 3; } // Specialization of #2
24
25 int main() {
26 g(0);
27 assert(called == 1);
28 g(x);
29 assert(called == 2);
30 g(y);
31 assert(called == 3);
32 }