Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/concepts-err1.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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// PR c++/93551 // { dg-do compile { target concepts } } namespace std { template<typename _Tp, _Tp __v> struct integral_constant { static constexpr _Tp value = __v; typedef _Tp value_type; typedef integral_constant<_Tp, __v> type; constexpr operator value_type() const noexcept { return value; } }; template<typename _Base, typename _Derived> struct is_base_of : public integral_constant<bool, __is_base_of(_Base, _Derived)> { }; template <typename _Base, typename _Derived> inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; } class Bar { }; struct Foo { template <typename P> requires std::is_base_of_v<Bar, P> Foo(P const&); }; template <typename P> Foo fun(P const& arg) { (bool)arg; // { dg-error "" } return Foo {arg}; } int main() { fun(Bar{}); return 0; }