forked from OSchip/llvm-project
74 lines
2.4 KiB
C++
74 lines
2.4 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
|
|
|
|
// constexpr auto begin()
|
|
// requires (!(simple-view<V> &&
|
|
// random_access_range<const V> && sized_range<const V>));
|
|
// constexpr auto begin() const
|
|
// requires random_access_range<const V> && sized_range<const V>;
|
|
|
|
#include <ranges>
|
|
|
|
#include "test_macros.h"
|
|
#include "types.h"
|
|
|
|
template<class T>
|
|
concept BeginInvocable = requires(std::ranges::drop_view<T> t) { t.begin(); };
|
|
|
|
constexpr bool test() {
|
|
// random_access_range<const V> && sized_range<const V>
|
|
std::ranges::drop_view dropView1(MoveOnlyView(), 4);
|
|
assert(dropView1.begin() == globalBuff + 4);
|
|
|
|
// !random_access_range<const V>
|
|
std::ranges::drop_view dropView2(ForwardView(), 4);
|
|
assert(dropView2.begin().base() == globalBuff + 4);
|
|
|
|
// !random_access_range<const V>
|
|
std::ranges::drop_view dropView3(InputView(), 4);
|
|
assert(dropView3.begin().base() == globalBuff + 4);
|
|
|
|
// random_access_range<const V> && sized_range<const V>
|
|
std::ranges::drop_view dropView4(MoveOnlyView(), 8);
|
|
assert(dropView4.begin() == globalBuff + 8);
|
|
|
|
// random_access_range<const V> && sized_range<const V>
|
|
std::ranges::drop_view dropView5(MoveOnlyView(), 0);
|
|
assert(dropView5.begin() == globalBuff);
|
|
|
|
// random_access_range<const V> && sized_range<const V>
|
|
const std::ranges::drop_view dropView6(MoveOnlyView(), 0);
|
|
assert(dropView6.begin() == globalBuff);
|
|
|
|
// random_access_range<const V> && sized_range<const V>
|
|
std::ranges::drop_view dropView7(MoveOnlyView(), 10);
|
|
assert(dropView7.begin() == globalBuff + 8);
|
|
|
|
CountedView view8;
|
|
std::ranges::drop_view dropView8(view8, 5);
|
|
assert(dropView8.begin().base().base() == globalBuff + 5);
|
|
assert(dropView8.begin().stride_count() == 5);
|
|
assert(dropView8.begin().base().base() == globalBuff + 5);
|
|
assert(dropView8.begin().stride_count() == 5);
|
|
|
|
static_assert(!BeginInvocable<const ForwardView>);
|
|
|
|
return true;
|
|
}
|
|
|
|
int main(int, char**) {
|
|
test();
|
|
static_assert(test());
|
|
|
|
return 0;
|
|
}
|