forked from OSchip/llvm-project
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
// -*- C++ -*-
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//===------------------------------ span ---------------------------------===//
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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++98, c++03, c++11, c++14, c++17
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// <span>
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// constexpr span(const span& other) noexcept = default;
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#include <span>
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#include <cassert>
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#include <string>
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#include "test_macros.h"
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template <typename T>
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constexpr bool doCopy(const T &rhs)
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{
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ASSERT_NOEXCEPT(T{rhs});
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T lhs{rhs};
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return lhs.data() == rhs.data()
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&& lhs.size() == rhs.size();
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}
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struct A{};
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template <typename T>
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void testCV ()
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{
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int arr[] = {1,2,3};
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assert((doCopy(std::span<T> () )));
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assert((doCopy(std::span<T,0>() )));
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assert((doCopy(std::span<T> (&arr[0], 1))));
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assert((doCopy(std::span<T,1>(&arr[0], 1))));
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assert((doCopy(std::span<T> (&arr[0], 2))));
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assert((doCopy(std::span<T,2>(&arr[0], 2))));
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}
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int main(int, char**)
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{
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constexpr int carr[] = {1,2,3};
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static_assert(doCopy(std::span< int> ()), "");
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static_assert(doCopy(std::span< int,0>()), "");
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static_assert(doCopy(std::span<const int> (&carr[0], 1)), "");
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static_assert(doCopy(std::span<const int,1>(&carr[0], 1)), "");
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static_assert(doCopy(std::span<const int> (&carr[0], 2)), "");
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static_assert(doCopy(std::span<const int,2>(&carr[0], 2)), "");
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static_assert(doCopy(std::span<long>()), "");
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static_assert(doCopy(std::span<double>()), "");
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static_assert(doCopy(std::span<A>()), "");
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std::string s;
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assert(doCopy(std::span<std::string> () ));
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assert(doCopy(std::span<std::string, 0>() ));
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assert(doCopy(std::span<std::string> (&s, 1)));
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assert(doCopy(std::span<std::string, 1>(&s, 1)));
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testCV< int>();
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testCV<const int>();
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testCV< volatile int>();
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testCV<const volatile int>();
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return 0;
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}
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