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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
//
//===----------------------------------------------------------------------===//
// REQUIRES: std-at-least-c++20
// [range.access.general]/1:
// In addition to being available via inclusion of the <ranges> header, the customization point objects in
// [range.access] are available when the header <iterator> is included.
#include <iterator>
#include <type_traits>
#include "test_macros.h"
template <class CPO, class... Args>
constexpr void test(CPO& o, Args&&... args) {
static_assert(std::is_const_v<CPO>);
static_assert(std::is_class_v<CPO>);
static_assert(std::is_trivially_copyable_v<CPO>);
static_assert(std::is_trivially_default_constructible_v<CPO>);
auto p = o;
using T = decltype(p);
(void)o(args...); // to make sure the CPO can actually be used
// The type of a customization point object, ignoring cv-qualifiers, shall model semiregular.
static_assert(std::semiregular<T>);
// The type T of a customization point object, ignoring cv-qualifiers, shall model...
static_assert(std::invocable<T&, Args...>);
static_assert(std::invocable<const T&, Args...>);
static_assert(std::invocable<T, Args...>);
static_assert(std::invocable<const T, Args...>);
}
int a[10];
constexpr bool test() {
test(std::ranges::begin, a);
test(std::ranges::end, a);
test(std::ranges::cbegin, a);
test(std::ranges::cdata, a);
test(std::ranges::cend, a);
test(std::ranges::crbegin, a);
test(std::ranges::crend, a);
test(std::ranges::data, a);
test(std::ranges::empty, a);
test(std::ranges::rbegin, a);
test(std::ranges::rend, a);
test(std::ranges::size, a);
test(std::ranges::ssize, a);
#if TEST_STD_VER >= 26
// test(std::views::reserve_hint, a);
#endif
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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