fenv.h
Go to the documentation of this file.
// -*- C++ -*- compatibility header.
// Copyright (C) 2007-2018 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file fenv.h
* This is a Standard C++ Library header.
*/
#ifndef _GLIBCXX_FENV_H
#define _GLIBCXX_FENV_H 1
#pragma GCC system_header
#include <bits/c++config.h>
#if _GLIBCXX_HAVE_FENV_H
# include_next <fenv.h>
#endif
#if __cplusplus >= 201103L
#if _GLIBCXX_USE_C99_FENV_TR1
#undef feclearexcept
#undef fegetexceptflag
#undef feraiseexcept
#undef fesetexceptflag
#undef fetestexcept
#undef fegetround
#undef fesetround
#undef fegetenv
#undef feholdexcept
#undef fesetenv
#undef feupdateenv
namespace std
{
// types
using ::fenv_t;
using ::fexcept_t;
// functions
using ::feclearexcept;
using ::fegetexceptflag;
using ::feraiseexcept;
using ::fesetexceptflag;
using ::fetestexcept;
using ::fegetround;
using ::fesetround;
using ::fegetenv;
using ::feholdexcept;
using ::fesetenv;
using ::feupdateenv;
} // namespace
#endif // _GLIBCXX_USE_C99_FENV_TR1
#endif // C++11
#endif // _GLIBCXX_FENV_H
c++config.h
std
ISO C++ entities toplevel namespace is std.