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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
// template <class I>
// struct in_found_result;
#include <algorithm>
#include <cassert>
#include <type_traits>
#include "MoveOnly.h"
struct A {
explicit A(int);
};
// no implicit conversion
static_assert(!std::is_constructible_v<std::ranges::in_found_result<A>, std::ranges::in_found_result<int>>);
struct B {
B(const int&);
B(int&&);
};
// implicit conversion
static_assert(std::is_constructible_v<std::ranges::in_found_result<B>, std::ranges::in_found_result<int>>);
static_assert(std::is_constructible_v<std::ranges::in_found_result<B>, std::ranges::in_found_result<int>&>);
static_assert(std::is_constructible_v<std::ranges::in_found_result<B>, const std::ranges::in_found_result<int>>);
static_assert(std::is_constructible_v<std::ranges::in_found_result<B>, const std::ranges::in_found_result<int>&>);
struct C {
C(int&);
};
static_assert(!std::is_constructible_v<std::ranges::in_found_result<C>, std::ranges::in_found_result<int>&>);
// has to be convertible via const&
static_assert(std::is_convertible_v<std::ranges::in_found_result<int>&, std::ranges::in_found_result<long>>);
static_assert(std::is_convertible_v<const std::ranges::in_found_result<int>&, std::ranges::in_found_result<long>>);
static_assert(std::is_convertible_v<std::ranges::in_found_result<int>&&, std::ranges::in_found_result<long>>);
static_assert(std::is_convertible_v<const std::ranges::in_found_result<int>&&, std::ranges::in_found_result<long>>);
// should be move constructible
static_assert(std::is_move_constructible_v<std::ranges::in_found_result<MoveOnly>>);
// should not be copy constructible
static_assert(!std::is_copy_constructible_v<std::ranges::in_found_result<MoveOnly>>);
struct NotConvertible {};
// conversions should not work if there is no conversion
static_assert(!std::is_convertible_v<std::ranges::in_found_result<NotConvertible>, std::ranges::in_found_result<int>>);
static_assert(std::is_same_v<decltype(std::ranges::in_found_result<int>::in), int>);
static_assert(std::is_same_v<decltype(std::ranges::in_found_result<int>::found), bool>);
template <class T>
struct ConvertibleFrom {
constexpr ConvertibleFrom(T c) : content{c} {}
T content;
};
constexpr bool test() {
{
std::ranges::in_found_result<double> res{10, true};
assert(res.in == 10);
assert(res.found == true);
std::ranges::in_found_result<ConvertibleFrom<int>> res2 = res;
assert(res2.in.content == 10);
assert(res2.found == true);
}
{
std::ranges::in_found_result<MoveOnly> res{MoveOnly{}, false};
assert(res.in.get() == 1);
assert(!res.found);
auto res2 = std::move(res);
assert(res2.in.get() == 1);
assert(!res2.found);
assert(res.in.get() == 0);
assert(!res.found);
}
auto [in, found] = std::ranges::in_found_result<int>{2, false};
assert(in == 2);
assert(!found);
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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