1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 10 11 // repeat_view() requires default_initializable<T> = default; 12 13 #include <ranges> 14 #include <cassert> 15 #include <concepts> 16 17 struct DefaultInt42 { 18 int value = 42; 19 }; 20 21 struct Int { IntInt22 Int(int) {} 23 }; 24 25 static_assert(std::default_initializable<std::ranges::repeat_view<DefaultInt42>>); 26 static_assert(!std::default_initializable<std::ranges::repeat_view<Int>>); 27 test()28constexpr bool test() { 29 std::ranges::repeat_view<DefaultInt42> rv; 30 assert((*rv.begin()).value == 42); 31 32 return true; 33 } 34 main(int,char **)35int main(int, char**) { 36 test(); 37 static_assert(test()); 38 39 return 0; 40 } 41