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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
// class std::ranges::subrange;
#include <ranges>
#include <cassert>
#include "test_iterators.h"
#include "types.h"
constexpr bool test() {
int buff[] = {1, 2, 3, 4, 5};
{
std::ranges::subrange<MoveOnlyForwardIter, int*> a(MoveOnlyForwardIter(buff), buff + 5, 5);
assert(base(a.begin()) == buff);
assert(!a.empty());
assert(a.size() == 5);
}
{
std::ranges::subrange<ForwardIter> b(ForwardIter(nullptr), ForwardIter(nullptr));
assert(b.empty());
}
{
std::ranges::subrange<ForwardIter> c{ForwardIter(buff), ForwardIter(buff)};
assert(c.empty());
}
{
std::ranges::subrange<ForwardIter> d(ForwardIter(buff), ForwardIter(buff + 1));
assert(!d.empty());
}
{
bool minusWasCalled = false;
SizedSentinelForwardIter beg(buff, &minusWasCalled), end(buff + 5, &minusWasCalled);
std::ranges::subrange<SizedSentinelForwardIter> e(beg, end, 5);
assert(!e.empty());
// Make sure that operator- is used to calculate size when possible.
minusWasCalled = false;
assert(e.size() == 5);
assert(minusWasCalled);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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