Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/req7.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// { dg-do compile { target c++17 } } // { dg-options "-fconcepts" } #include <vector> using namespace std; template<typename T> struct Sequence : std::false_type { }; template<typename T> struct Predicate : std::false_type { }; template<typename Seq, typename Fn> requires Sequence<Seq>{} and Predicate<Fn>{} bool all(const Seq& seq, Fn fn) { for(const auto& x : seq) if (not fn(x)) return false; return true; } int main() { all(vector<int>{0, 2}, true); // { dg-error "not|bool" } }