| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // constexpr W operator*() const noexcept(is_nothrow_copy_constructible_v<W>); |
| |
| #include "test_macros.h" |
| |
| TEST_CLANG_DIAGNOSTIC_IGNORED("-Wsign-compare") |
| TEST_GCC_DIAGNOSTIC_IGNORED("-Wsign-compare") |
| TEST_MSVC_DIAGNOSTIC_IGNORED(4018) // various "signed/unsigned mismatch" |
| |
| #include <ranges> |
| #include <cassert> |
| |
| #include "../types.h" |
| |
| struct NotNoexceptCopy { |
| using difference_type = int; |
| |
| int value_; |
| constexpr explicit NotNoexceptCopy(int value = 0) : value_(value) {} |
| constexpr NotNoexceptCopy(const NotNoexceptCopy& other) noexcept(false) : value_(other.value_) {} |
| |
| bool operator==(const NotNoexceptCopy&) const = default; |
| |
| friend constexpr NotNoexceptCopy& operator+=(NotNoexceptCopy &lhs, const NotNoexceptCopy& rhs) { |
| lhs.value_ += rhs.value_; return lhs; |
| } |
| friend constexpr NotNoexceptCopy& operator-=(NotNoexceptCopy &lhs, const NotNoexceptCopy& rhs) { |
| lhs.value_ -= rhs.value_; return lhs; |
| } |
| |
| friend constexpr NotNoexceptCopy operator+(NotNoexceptCopy lhs, NotNoexceptCopy rhs) { |
| return NotNoexceptCopy{lhs.value_ + rhs.value_}; |
| } |
| friend constexpr int operator-(NotNoexceptCopy lhs, NotNoexceptCopy rhs) { |
| return lhs.value_ - rhs.value_; |
| } |
| |
| constexpr NotNoexceptCopy& operator++() { ++value_; return *this; } |
| constexpr void operator++(int) { ++value_; } |
| }; |
| |
| template<class T> |
| constexpr void testType() { |
| { |
| std::ranges::iota_view<T> io(T(0)); |
| auto iter = io.begin(); |
| for (int i = 0; i < 100; ++i, ++iter) |
| assert(*iter == T(i)); |
| |
| static_assert(noexcept(*iter) == !std::same_as<T, NotNoexceptCopy>); |
| } |
| { |
| std::ranges::iota_view<T> io(T(10)); |
| auto iter = io.begin(); |
| for (int i = 10; i < 100; ++i, ++iter) |
| assert(*iter == T(i)); |
| } |
| { |
| const std::ranges::iota_view<T> io(T(0)); |
| auto iter = io.begin(); |
| for (int i = 0; i < 100; ++i, ++iter) |
| assert(*iter == T(i)); |
| } |
| { |
| const std::ranges::iota_view<T> io(T(10)); |
| auto iter = io.begin(); |
| for (int i = 10; i < 100; ++i, ++iter) |
| assert(*iter == T(i)); |
| } |
| } |
| |
| constexpr bool test() { |
| testType<SomeInt>(); |
| testType<NotNoexceptCopy>(); |
| testType<signed long>(); |
| testType<unsigned long>(); |
| testType<int>(); |
| testType<unsigned>(); |
| testType<short>(); |
| testType<unsigned short>(); |
| |
| // Tests a mix of signed unsigned types. |
| { |
| const std::ranges::iota_view<int, unsigned> io(0, 10); |
| auto iter = io.begin(); |
| for (int i = 0; i < 10; ++i, ++iter) |
| assert(*iter == i); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |