80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
// Copyright (C) 2019-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-options "-std=gnu++2a" }
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// { dg-do run { target c++2a } }
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#include <numeric>
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#include <limits>
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#include <cfloat>
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#include <testsuite_hooks.h>
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void
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test01()
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{
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using lim = std::numeric_limits<double>;
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VERIFY( std::midpoint(2.0, 4.0) == 3.0 );
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VERIFY( std::midpoint(0.0, 0.4) == 0.2 );
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VERIFY( std::midpoint(0.0, -0.0) == 0.0 );
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VERIFY( std::midpoint(9e9, -9e9) == 0.0 );
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VERIFY( std::midpoint(lim::max(), lim::max()) == lim::max() );
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}
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void
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test02()
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{
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using lim = std::numeric_limits<float>;
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VERIFY( std::midpoint(2.0f, 4.0f) == 3.0f );
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VERIFY( std::midpoint(0.0f, 0.4f) == 0.2f );
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VERIFY( std::midpoint(0.0f, -0.0f) == 0.0f );
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VERIFY( std::midpoint(9e9f, -9e9f) == 0.0f );
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}
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void
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test03()
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{
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using lim = std::numeric_limits<long double>;
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VERIFY( std::midpoint(2.0l, 4.0l) == 3.0l );
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VERIFY( std::midpoint(0.0l, 0.4l) == 0.2l );
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VERIFY( std::midpoint(0.0l, -0.0l) == 0.0l );
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VERIFY( std::midpoint(9e9l, -9e9l) == 0.0l );
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}
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namespace test04
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{
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// https://gcc.gnu.org/ml/libstdc++/2019-03/msg00065.html
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constexpr double d = DBL_MIN + DBL_TRUE_MIN;
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static_assert( std::midpoint(d, d) == d );
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constexpr float f = FLT_MIN + FLT_TRUE_MIN;
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static_assert( std::midpoint(f, f) == f );
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constexpr long double l = LDBL_MIN + LDBL_TRUE_MIN;
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static_assert( std::midpoint(l, l) == l );
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}
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int main()
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{
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test01();
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test02();
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test03();
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}
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