libstdc++
fenv.h
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1 // -*- C++ -*- compatibility header.
2 
3 // Copyright (C) 2007-2022 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file fenv.h
26  * This is a Standard C++ Library header.
27  */
28 
29 #ifndef _GLIBCXX_FENV_H
30 #define _GLIBCXX_FENV_H 1
31 
32 #pragma GCC system_header
33 
34 #include <bits/c++config.h>
35 #if _GLIBCXX_HAVE_FENV_H
36 # include_next <fenv.h>
37 #endif
38 
39 #if __cplusplus >= 201103L
40 
41 #if _GLIBCXX_USE_C99_FENV_TR1
42 
43 #undef feclearexcept
44 #undef fegetexceptflag
45 #undef feraiseexcept
46 #undef fesetexceptflag
47 #undef fetestexcept
48 #undef fegetround
49 #undef fesetround
50 #undef fegetenv
51 #undef feholdexcept
52 #undef fesetenv
53 #undef feupdateenv
54 
55 namespace std
56 {
57  // types
58  using ::fenv_t;
59  using ::fexcept_t;
60 
61  // functions
62  using ::feclearexcept;
63  using ::fegetexceptflag;
64  using ::feraiseexcept;
65  using ::fesetexceptflag;
66  using ::fetestexcept;
67 
68  using ::fegetround;
69  using ::fesetround;
70 
71  using ::fegetenv;
72  using ::feholdexcept;
73  using ::fesetenv;
74  using ::feupdateenv;
75 } // namespace
76 
77 #endif // _GLIBCXX_USE_C99_FENV_TR1
78 
79 #endif // C++11
80 
81 #endif // _GLIBCXX_FENV_H
std
ISO C++ entities toplevel namespace is std.