Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/variadic2.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children | 1830386684a0 |
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// { dg-do compile { target c++17 } } // { dg-options "-fconcepts" } template <class T> concept bool Copyable = requires (T t) { T(t); }; template <class T> concept bool Constructable = requires { T(); }; template <class T> concept bool Both = Copyable<T> && Constructable<T>; template <Copyable... Ts> constexpr int f(Ts...) { return 0; } // #1 template <Both... Ts> constexpr int f(Ts...) { return 1; } // #2 int main() { static_assert(f(42) == 1); }