blob: 1956c97c98713a7a5fdd28bbd3959ea1237d171f [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <numeric>
// template <class _Tp>
// _Tp midpoint(_Tp __a, _Tp __b) noexcept
//
#include <stdint.h>
#include <limits>
#include <numeric>
#include <cassert>
#include "test_macros.h"
template <typename T>
void signed_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(T( 3), T( 4)) == T(3));
assert(std::midpoint(T( 4), T( 3)) == T(4));
assert(std::midpoint(T(-3), T( 4)) == T(0));
assert(std::midpoint(T(-4), T( 3)) == T(-1));
assert(std::midpoint(T( 3), T(-4)) == T(0));
assert(std::midpoint(T( 4), T(-3)) == T(1));
assert(std::midpoint(T(-3), T(-4)) == T(-3));
assert(std::midpoint(T(-4), T(-3)) == T(-4));
static_assert(std::midpoint(limits::min(), limits::max()) == T(-1), "");
static_assert(std::midpoint(limits::max(), limits::min()) == T( 0), "");
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == limits::max()/2 + 4);
static_assert(std::midpoint(T(6), limits::max()) == limits::max()/2 + 3, "");
assert( std::midpoint(limits::min(), T(-6)) == limits::min()/2 - 3);
static_assert(std::midpoint(T(-6), limits::min()) == limits::min()/2 - 3, "");
static_assert(std::midpoint(limits::max(), T(-6)) == limits::max()/2 - 2, "");
assert( std::midpoint(T(-6), limits::max()) == limits::max()/2 - 3);
}
template <typename T>
void unsigned_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
const T half_way = (limits::max() - limits::min())/2;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(limits::min(), limits::max()) == T(half_way));
assert(std::midpoint(limits::max(), limits::min()) == T(half_way + 1));
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == half_way + 4);
static_assert(std::midpoint(T(6), limits::max()) == half_way + 3, "");
}
int main(int, char**)
{
signed_test<signed char>();
signed_test<short>();
signed_test<int>();
signed_test<long>();
signed_test<long long>();
signed_test<int8_t>();
signed_test<int16_t>();
signed_test<int32_t>();
signed_test<int64_t>();
unsigned_test<unsigned char>();
unsigned_test<unsigned short>();
unsigned_test<unsigned int>();
unsigned_test<unsigned long>();
unsigned_test<unsigned long long>();
unsigned_test<uint8_t>();
unsigned_test<uint16_t>();
unsigned_test<uint32_t>();
unsigned_test<uint64_t>();
#ifndef _LIBCPP_HAS_NO_INT128
unsigned_test<__uint128_t>();
signed_test<__int128_t>();
#endif
// int_test<char>();
signed_test<ptrdiff_t>();
unsigned_test<size_t>();
return 0;
}