| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| // UNSUPPORTED: libcpp-has-no-incomplete-ranges |
| |
| // template<class T> |
| // requires is_object_v<T> |
| // class non-propagating-cache; |
| |
| #include <ranges> |
| |
| template<template<class...> class T, class ...Args> |
| concept well_formed = requires { |
| typename T<Args...>; |
| }; |
| |
| struct T { }; |
| static_assert( well_formed<std::ranges::__non_propagating_cache, int>); |
| static_assert( well_formed<std::ranges::__non_propagating_cache, T>); |
| static_assert( well_formed<std::ranges::__non_propagating_cache, void (*)()>); |
| static_assert(!well_formed<std::ranges::__non_propagating_cache, void>); |
| static_assert(!well_formed<std::ranges::__non_propagating_cache, T&>); |
| static_assert(!well_formed<std::ranges::__non_propagating_cache, void()>); |
