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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
// 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;
}
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