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88 lines
2.7 KiB
C++
88 lines
2.7 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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//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <numeric>
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// template <class _Tp>
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// _Tp* midpoint(_Tp* __a, _Tp* __b) noexcept
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//
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#include <numeric>
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#include <cassert>
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#include "test_macros.h"
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template <typename T>
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constexpr void constexpr_test()
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{
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constexpr T array[1000] = {};
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ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), const T*);
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ASSERT_NOEXCEPT( std::midpoint(array, array));
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static_assert(std::midpoint(array, array) == array, "");
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static_assert(std::midpoint(array, array + 1000) == array + 500, "");
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static_assert(std::midpoint(array, array + 9) == array + 4, "");
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static_assert(std::midpoint(array, array + 10) == array + 5, "");
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static_assert(std::midpoint(array, array + 11) == array + 5, "");
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static_assert(std::midpoint(array + 9, array) == array + 5, "");
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static_assert(std::midpoint(array + 10, array) == array + 5, "");
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static_assert(std::midpoint(array + 11, array) == array + 6, "");
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}
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template <typename T>
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void runtime_test()
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{
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T array[1000] = {}; // we need an array to make valid pointers
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ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), T*);
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ASSERT_NOEXCEPT( std::midpoint(array, array));
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assert(std::midpoint(array, array) == array);
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assert(std::midpoint(array, array + 1000) == array + 500);
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assert(std::midpoint(array, array + 9) == array + 4);
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assert(std::midpoint(array, array + 10) == array + 5);
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assert(std::midpoint(array, array + 11) == array + 5);
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assert(std::midpoint(array + 9, array) == array + 5);
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assert(std::midpoint(array + 10, array) == array + 5);
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assert(std::midpoint(array + 11, array) == array + 6);
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}
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template <typename T>
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void pointer_test()
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{
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runtime_test< T>();
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runtime_test<const T>();
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runtime_test< volatile T>();
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runtime_test<const volatile T>();
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// The constexpr tests are always const, but we can test them anyway.
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constexpr_test< T>();
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constexpr_test<const T>();
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// GCC 9.0.1 (unreleased as of 2019-03) barfs on this, but we have a bot for it.
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// Uncomment when gcc 9.1 is released
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#ifndef TEST_COMPILER_GCC
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constexpr_test< volatile T>();
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constexpr_test<const volatile T>();
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#endif
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}
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int main(int, char**)
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{
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pointer_test<char>();
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pointer_test<int>();
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pointer_test<double>();
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return 0;
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}
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