49 lines
1.2 KiB
C++
49 lines
1.2 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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// Test the example from LWG 3470,
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// qualification conversions in __convertible_to_non_slicing
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#include <ranges>
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#include <cassert>
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#include "test_macros.h"
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constexpr bool test()
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{
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// The example from LWG3470, using implicit conversion.
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int a[3] = { 1, 2, 3 };
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int* b[3] = { &a[2], &a[0], &a[1] };
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std::ranges::subrange<const int* const*> c = b;
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assert(c.begin() == b + 0);
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assert(c.end() == b + 3);
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// Also test CTAD and a subrange-to-subrange conversion.
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std::same_as<std::ranges::subrange<int**>> auto d = std::ranges::subrange(b);
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assert(d.begin() == b + 0);
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assert(d.end() == b + 3);
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std::ranges::subrange<const int* const*> e = d;
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assert(e.begin() == b + 0);
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assert(e.end() == b + 3);
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return true;
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}
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int main(int, char**)
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{
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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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