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// Copyright (C) 2019-2022 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <numeric>
#include <limits>
#include <cfloat>
#include <testsuite_hooks.h>
void
test01()
{
using lim = std::numeric_limits<double>;
VERIFY( std::midpoint(2.0, 4.0) == 3.0 );
VERIFY( std::midpoint(0.0, 0.4) == 0.2 );
VERIFY( std::midpoint(0.0, -0.0) == 0.0 );
VERIFY( std::midpoint(9e9, -9e9) == 0.0 );
VERIFY( std::midpoint(lim::max(), lim::max()) == lim::max() );
}
void
test02()
{
using lim = std::numeric_limits<float>;
VERIFY( std::midpoint(2.0f, 4.0f) == 3.0f );
VERIFY( std::midpoint(0.0f, 0.4f) == 0.2f );
VERIFY( std::midpoint(0.0f, -0.0f) == 0.0f );
VERIFY( std::midpoint(9e9f, -9e9f) == 0.0f );
}
void
test03()
{
using lim = std::numeric_limits<long double>;
VERIFY( std::midpoint(2.0l, 4.0l) == 3.0l );
VERIFY( std::midpoint(0.0l, 0.4l) == 0.2l );
VERIFY( std::midpoint(0.0l, -0.0l) == 0.0l );
VERIFY( std::midpoint(9e9l, -9e9l) == 0.0l );
}
namespace test04
{
// https://gcc.gnu.org/ml/libstdc++/2019-03/msg00065.html
constexpr double d = DBL_MIN + DBL_TRUE_MIN;
static_assert( std::midpoint(d, d) == d );
constexpr float f = FLT_MIN + FLT_TRUE_MIN;
static_assert( std::midpoint(f, f) == f );
constexpr long double l = LDBL_MIN + LDBL_TRUE_MIN;
static_assert( std::midpoint(l, l) == l );
}
int main()
{
test01();
test02();
test03();
}