59 lines
1.7 KiB
C++
59 lines
1.7 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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// UNSUPPORTED: libcpp-no-concepts
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// UNSUPPORTED: gcc-10
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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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_macros.h"
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#include "test_iterators.h"
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#include "../subrange_test_types.h"
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// Note: begin and end tested in range.subrange.ctor.pass.cpp.
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constexpr bool test() {
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std::ranges::subrange<MoveOnlyForwardIter, int*> a(MoveOnlyForwardIter(globalBuff), globalBuff + 8, 8);
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assert(a.begin().base == globalBuff);
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assert(!a.empty());
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assert(a.size() == 8);
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std::ranges::subrange<ForwardIter> b(ForwardIter(nullptr), ForwardIter(nullptr));
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assert(b.empty());
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std::ranges::subrange<ForwardIter> c{ForwardIter(globalBuff), ForwardIter(globalBuff)};
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assert(c.empty());
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std::ranges::subrange<ForwardIter> d(ForwardIter(globalBuff), ForwardIter(globalBuff + 1));
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assert(!d.empty());
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std::ranges::subrange<SizedSentinelForwardIter> e(SizedSentinelForwardIter(globalBuff),
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SizedSentinelForwardIter(globalBuff + 8), 8);
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assert(!e.empty());
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assert(e.size() == 8);
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// Make sure that operator- is used to calculate size when possible.
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if (!std::is_constant_evaluated())
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assert(SizedSentinelForwardIter::minusCount == 1);
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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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