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//===----------------------------------------------------------------------===//
//
// 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;
}
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