libstdc++: stdexcept_throw.h Source File

libstdc++

stdexcept_throw.h
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1// Function-Based Exception Support -*- C++ -*-
2
3// Copyright (C) 2001-2026 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 bits/stdexcept_throw.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{stdexcept}
28 */
29
30//
31// ISO C++ 14882: 19.1 Exception classes
32//
33
34#include <bits/c++config.h>
35#include <bits/exception_defines.h>
36
37#if (_GLIBCXX_HOSTED && __cpp_exceptions && __cplusplus > 202302L \
38 && __cpp_constexpr_exceptions >= 202411L)
39// This is a complicated case. Classes like std::logic_error
40// are defined in <stdexcept> but need std::string and <string>
41// needs __throw_logic_error and a few others. So, for C++26
42// constant expression we need to forward declare the constexpr
43// __throw_logic_error etc. functions when included recursively
44// from <string> and then at the end of that header make sure
45// <stdexcept> is included and define those.
46// If <string> hasn't been included yet, include it at the end
47// of this header and that will arrange for all these to be
48// defined.
49#if defined(_GLIBCXX_STRING) || __glibcxx_exc_in_string == 2
50#ifdef __glibcxx_exc_in_string
51#include <bits/stdexcept_throwfwd.h>
52#else
53#include <bits/stdexcept_throwdef.h>
54#endif
55#endif
56#if !defined(_GLIBCXX_STRING) && __glibcxx_exc_in_string != 2
57#include <string>
58#endif
59#else
60#include <bits/stdexcept_throwfwd.h>
61#endif
string
stdexcept_throwdef.h
stdexcept_throwfwd.h
exception_defines.h
c++config.h