66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// class std::ranges::subrange;
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#include <ranges>
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#include <cassert>
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#include "test_iterators.h"
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#include "types.h"
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constexpr bool test() {
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int buff[] = {1, 2, 3, 4, 5};
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{
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std::ranges::subrange<MoveOnlyForwardIter, int*> a(MoveOnlyForwardIter(buff), buff + 5, 5);
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assert(base(a.begin()) == buff);
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assert(!a.empty());
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assert(a.size() == 5);
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}
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{
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std::ranges::subrange<ForwardIter> b(ForwardIter(nullptr), ForwardIter(nullptr));
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assert(b.empty());
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}
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{
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std::ranges::subrange<ForwardIter> c{ForwardIter(buff), ForwardIter(buff)};
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assert(c.empty());
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}
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{
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std::ranges::subrange<ForwardIter> d(ForwardIter(buff), ForwardIter(buff + 1));
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assert(!d.empty());
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}
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{
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bool minusWasCalled = false;
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SizedSentinelForwardIter beg(buff, &minusWasCalled), end(buff + 5, &minusWasCalled);
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std::ranges::subrange<SizedSentinelForwardIter> e(beg, end, 5);
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assert(!e.empty());
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// Make sure that operator- is used to calculate size when possible.
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minusWasCalled = false;
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assert(e.size() == 5);
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assert(minusWasCalled);
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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