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
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
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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// constexpr explicit repeat_view(const T& value, Bound bound = Bound()) requires copy_constructible<T>;
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// constexpr explicit repeat_view(T&& value, Bound bound = Bound());
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#include <ranges>
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#include <cassert>
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#include <iterator>
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#include <type_traits>
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#include "MoveOnly.h"
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struct Empty {};
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// Test explicit
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static_assert(std::is_constructible_v<std::ranges::repeat_view<Empty>, const Empty&>);
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static_assert(std::is_constructible_v<std::ranges::repeat_view<Empty>, Empty&&>);
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static_assert(std::is_constructible_v<std::ranges::repeat_view<Empty, int>, const Empty&>);
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static_assert(std::is_constructible_v<std::ranges::repeat_view<Empty, int>, Empty&&>);
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static_assert(!std::is_convertible_v<const Empty&, std::ranges::repeat_view<Empty>>);
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static_assert(!std::is_convertible_v<Empty&&, std::ranges::repeat_view<Empty>>);
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static_assert(!std::is_convertible_v<const Empty&, std::ranges::repeat_view<Empty, int>>);
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static_assert(!std::is_convertible_v<Empty&&, std::ranges::repeat_view<Empty, int>>);
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static_assert(!std::is_constructible_v<std::ranges::repeat_view<MoveOnly>, const MoveOnly&>);
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static_assert(std::is_constructible_v<std::ranges::repeat_view<MoveOnly>, MoveOnly&&>);
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constexpr bool test() {
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// Move && unbound && default argument
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{
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std::ranges::repeat_view<Empty> rv(Empty{});
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assert(rv.begin() + 10 != rv.end());
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}
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// Move && unbound && user-provided argument
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{
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std::ranges::repeat_view<Empty> rv(Empty{}, std::unreachable_sentinel);
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assert(rv.begin() + 10 != rv.end());
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}
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// Move && bound && default argument
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{
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std::ranges::repeat_view<Empty, int> rv(Empty{});
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assert(rv.begin() == rv.end());
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}
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// Move && bound && user-provided argument
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{
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std::ranges::repeat_view<Empty, int> rv(Empty{}, 10);
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assert(rv.begin() + 10 == rv.end());
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}
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// Copy && unbound && default argument
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{
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Empty e;
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std::ranges::repeat_view<Empty> rv(e);
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assert(rv.begin() + 10 != rv.end());
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}
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// Copy && unbound && user-provided argument
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{
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Empty e;
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std::ranges::repeat_view<Empty> rv(e, std::unreachable_sentinel);
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assert(rv.begin() + 10 != rv.end());
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}
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// Copy && bound && default argument
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{
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Empty e;
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std::ranges::repeat_view<Empty, int> rv(e);
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assert(rv.begin() == rv.end());
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}
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// Copy && bound && user-provided argument
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{
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Empty e;
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std::ranges::repeat_view<Empty, int> rv(e, 10);
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assert(rv.begin() + 10 == rv.end());
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}
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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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