52 lines
2.0 KiB
C++
52 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
// UNSUPPORTED: libcpp-no-concepts
|
|
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
|
|
|
|
// class std::ranges::subrange;
|
|
|
|
#include <ranges>
|
|
|
|
#include <cassert>
|
|
#include "test_macros.h"
|
|
#include "test_iterators.h"
|
|
|
|
using FI = forward_iterator<int*>;
|
|
FI fi{nullptr};
|
|
int *ptr = nullptr;
|
|
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(fi, fi)),
|
|
std::ranges::subrange<FI, FI, std::ranges::subrange_kind::unsized>>);
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(ptr, ptr, 0)),
|
|
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(ptr, nullptr, 0)),
|
|
std::ranges::subrange<int*, std::nullptr_t, std::ranges::subrange_kind::sized>>);
|
|
|
|
struct ForwardRange {
|
|
forward_iterator<int*> begin() const;
|
|
forward_iterator<int*> end() const;
|
|
};
|
|
template<>
|
|
inline constexpr bool std::ranges::enable_borrowed_range<ForwardRange> = true;
|
|
|
|
struct SizedRange {
|
|
int *begin();
|
|
int *end();
|
|
};
|
|
template<>
|
|
inline constexpr bool std::ranges::enable_borrowed_range<SizedRange> = true;
|
|
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(ForwardRange())),
|
|
std::ranges::subrange<FI, FI, std::ranges::subrange_kind::unsized>>);
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(SizedRange())),
|
|
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
|
|
static_assert(std::same_as<decltype(std::ranges::subrange(SizedRange(), 8)),
|
|
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
|