| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| #include "test_macros.h" |
| |
| TEST_CLANG_DIAGNOSTIC_IGNORED("-Wsign-compare") |
| TEST_GCC_DIAGNOSTIC_IGNORED("-Wsign-compare") |
| TEST_MSVC_DIAGNOSTIC_IGNORED(4018 4389) // various "signed/unsigned mismatch" |
| |
| // constexpr iota_view(type_identity_t<W> value, type_identity_t<Bound> bound); // explicit since C++23 |
| |
| #include <ranges> |
| #include <cassert> |
| |
| #include "test_convertible.h" |
| #include "types.h" |
| |
| // SFINAE tests. |
| |
| #if TEST_STD_VER >= 23 |
| |
| static_assert(!test_convertible<std::ranges::iota_view<SomeInt, SomeInt>, |
| decltype(std::ranges::iota_view<SomeInt, SomeInt>{}.begin()), |
| decltype(std::ranges::iota_view<SomeInt, SomeInt>{}.end())>(), |
| "This constructor must be explicit"); |
| |
| static_assert(!test_convertible<std::ranges::iota_view<SomeInt>, |
| decltype(std::ranges::iota_view<SomeInt>{}.begin()), |
| decltype(std::unreachable_sentinel)>(), |
| "This constructor must be explicit"); |
| |
| static_assert(!test_convertible<std::ranges::iota_view<SomeInt, IntComparableWith<SomeInt>>, |
| decltype(std::ranges::iota_view{SomeInt(0), IntComparableWith(SomeInt(10))}.begin()), |
| decltype(std::ranges::iota_view{SomeInt(0), IntComparableWith(SomeInt(10))}.end())>(), |
| "This constructor must be explicit"); |
| |
| #else |
| |
| static_assert( test_convertible<std::ranges::iota_view<SomeInt, SomeInt>, |
| decltype(std::ranges::iota_view<SomeInt, SomeInt>{}.begin()), |
| decltype(std::ranges::iota_view<SomeInt, SomeInt>{}.end())>(), |
| "This constructor must not be explicit"); |
| |
| static_assert( test_convertible<std::ranges::iota_view<SomeInt>, |
| decltype(std::ranges::iota_view<SomeInt>{}.begin()), |
| decltype(std::unreachable_sentinel)>(), |
| "This constructor must not be explicit"); |
| |
| static_assert( test_convertible<std::ranges::iota_view<SomeInt, IntComparableWith<SomeInt>>, |
| decltype(std::ranges::iota_view{SomeInt(0), IntComparableWith(SomeInt(10))}.begin()), |
| decltype(std::ranges::iota_view{SomeInt(0), IntComparableWith(SomeInt(10))}.end())>(), |
| "This constructor must not be explicit"); |
| |
| #endif // TEST_STD_VER >= 23 |
| |
| constexpr bool test() { |
| { |
| std::ranges::iota_view<SomeInt, SomeInt> io(SomeInt(0), SomeInt(10)); |
| assert(std::ranges::next(io.begin(), 10) == io.end()); |
| } |
| |
| { |
| std::ranges::iota_view<SomeInt> io(SomeInt(0), std::unreachable_sentinel); |
| assert(std::ranges::next(io.begin(), 10) != io.end()); |
| } |
| |
| { |
| std::ranges::iota_view<SomeInt, IntComparableWith<SomeInt>> io(SomeInt(0), IntComparableWith(SomeInt(10))); |
| assert(std::ranges::next(io.begin(), 10) == io.end()); |
| } |
| |
| { |
| // This is allowed only when using the constructor (not the deduction guide). |
| std::ranges::iota_view<int, unsigned> signedUnsigned(0, 10); |
| assert(std::ranges::next(signedUnsigned.begin(), 10) == signedUnsigned.end()); |
| } |
| |
| { |
| // This is allowed only when using the constructor (not the deduction guide). |
| std::ranges::iota_view<unsigned, int> signedUnsigned(0, 10); |
| assert(std::ranges::next(signedUnsigned.begin(), 10) == signedUnsigned.end()); |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| return 0; |
| } |