a2160dd34d
- Implement https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2474r2.html - Implement LWG3875(https://cplusplus.github.io/LWG/issue3875). Depends on D151629 Reviewed By: #libc, Mordante, philnik, var-const Differential Revision: https://reviews.llvm.org/D141699
41 lines
975 B
C++
41 lines
975 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// repeat_view() requires default_initializable<T> = default;
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#include <ranges>
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#include <cassert>
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#include <concepts>
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struct DefaultInt42 {
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int value = 42;
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};
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struct Int {
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Int(int) {}
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};
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static_assert(std::default_initializable<std::ranges::repeat_view<DefaultInt42>>);
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static_assert(!std::default_initializable<std::ranges::repeat_view<Int>>);
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constexpr bool test() {
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std::ranges::repeat_view<DefaultInt42> rv;
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assert((*rv.begin()).value == 42);
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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