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comparison gcc/testsuite/g++.dg/cpp2a/concepts-pr67654.C @ 145:1830386684a0

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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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131:84e7813d76e9 145:1830386684a0
1 // PR c++/67427
2 // { dg-do compile { target c++2a } }
3 // { dg-additional-options "-fconcepts-ts" }
4
5 template <bool... Values> struct and_c_impl {
6 static constexpr bool value = true;
7 };
8
9 template <bool ValueFirst, bool... ValuesRest>
10 struct and_c_impl<ValueFirst, ValuesRest...> {
11 static constexpr bool value = ValueFirst && and_c_impl<ValuesRest...>::value;
12 };
13
14 template <bool... Values> constexpr bool and_c() {
15 return and_c_impl<Values...>::value;
16 }
17
18 template<class T> concept bool C() {
19 return true;
20 }
21
22 template<class... Tx>
23 struct A {
24 A() requires and_c<C<Tx>()...>() = default;
25 };
26
27 int main() {
28 A<int, double> a;
29 return 0;
30 }