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EDITING: cast.h

// <cast.h> -*- C++ -*-

// Copyright (C) 2008-2023 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 ext/cast.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{ext/pointer.h}
 */

#ifndef _GLIBCXX_CAST_H
#define _GLIBCXX_CAST_H 1

namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   * These functions are here to allow containers to support non standard
   * pointer types.  For normal pointers, these resolve to the use of the
   * standard cast operation.  For other types the functions will perform
   * the appropriate cast to/from the custom pointer class so long as that
   * class meets the following conditions:
   * 1) has a typedef element_type which names tehe type it points to.
   * 2) has a get() const method which returns element_type*.
   * 3) has a constructor which can take one element_type* argument.
   */

/**
   * This type supports the semantics of the pointer cast operators (below.)
   */
  template<typename _ToType>
    struct _Caster
    { typedef typename _ToType::element_type*  type; };

template<typename _ToType>
    struct _Caster<_ToType*>
    { typedef _ToType*  type; };

/**
   * Casting operations for cases where _FromType is not a standard pointer.
   * _ToType can be a standard or non-standard pointer.  Given that _FromType
   * is not a pointer, it must have a get() method that returns the standard
   * pointer equivalent of the address it points to, and must have an
   * element_type typedef which names the type it points to.
   */
  template<typename _ToType, typename _FromType>
    inline _ToType
    __static_pointer_cast(const _FromType& __arg)
    { return _ToType(static_cast<typename _Caster<_ToType>::
		     type>(__arg.get())); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __dynamic_pointer_cast(const _FromType& __arg)
    { return _ToType(dynamic_cast<typename _Caster<_ToType>::
		     type>(__arg.get())); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __const_pointer_cast(const _FromType& __arg)
    { return _ToType(const_cast<typename _Caster<_ToType>::
		     type>(__arg.get())); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __reinterpret_pointer_cast(const _FromType& __arg)
    { return _ToType(reinterpret_cast<typename _Caster<_ToType>::
		     type>(__arg.get())); }

/**
   * Casting operations for cases where _FromType is a standard pointer.
   * _ToType can be a standard or non-standard pointer.
   */
  template<typename _ToType, typename _FromType>
    inline _ToType
    __static_pointer_cast(_FromType* __arg)
    { return _ToType(static_cast<typename _Caster<_ToType>::
		     type>(__arg)); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __dynamic_pointer_cast(_FromType* __arg)
    { return _ToType(dynamic_cast<typename _Caster<_ToType>::
		     type>(__arg)); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __const_pointer_cast(_FromType* __arg)
    { return _ToType(const_cast<typename _Caster<_ToType>::
		     type>(__arg)); }

template<typename _ToType, typename _FromType>
    inline _ToType
    __reinterpret_pointer_cast(_FromType* __arg)
    { return _ToType(reinterpret_cast<typename _Caster<_ToType>::
		     type>(__arg)); }

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif // _GLIBCXX_CAST_H

CANCEL

Name	Type	Size	Modified	Actions
↩ ..	DIR	—	—
📁 pb_ds/	DIR	—	2026-03-10 17:28
📄 algorithm	?	18.9 KB	2025-12-18 20:59	EDIT
📄 aligned_buffer.h	H	4 KB	2025-12-18 20:59	EDIT
📄 alloc_traits.h	H	6.5 KB	2025-12-18 20:59	EDIT
📄 atomicity.h	H	3.7 KB	2025-12-18 20:59	EDIT
📄 bitmap_allocator.h	H	31.3 KB	2025-12-18 20:59	EDIT
📄 cast.h	H	4.3 KB	2025-12-18 20:59	EDIT
📄 cmath	?	6.5 KB	2025-12-18 20:59	EDIT
📄 codecvt_specializations.h	H	16 KB	2025-12-18 20:59	EDIT
📄 concurrence.h	H	7.4 KB	2025-12-18 20:59	EDIT
📄 debug_allocator.h	H	5.8 KB	2025-12-18 20:59	EDIT
📄 enc_filebuf.h	H	2.3 KB	2025-12-18 20:59	EDIT
📄 extptr_allocator.h	H	6.3 KB	2025-12-18 20:59	EDIT
📄 functional	?	14 KB	2025-12-18 20:59	EDIT
📄 hash_map	?	17.4 KB	2025-12-18 20:59	EDIT
📄 hash_set	?	16.9 KB	2025-12-18 20:59	EDIT
📄 iterator	?	3.9 KB	2025-12-18 20:59	EDIT
📄 malloc_allocator.h	H	6 KB	2025-12-18 20:59	EDIT
📄 memory	?	7.1 KB	2025-12-18 20:59	EDIT
📄 mt_allocator.h	H	23.1 KB	2025-12-18 20:59	EDIT
📄 new_allocator.h	H	2.5 KB	2025-12-18 20:59	EDIT
📄 numeric	?	4.7 KB	2025-12-18 20:59	EDIT
📄 numeric_traits.h	H	8 KB	2025-12-18 20:59	EDIT
📄 pod_char_traits.h	H	5.5 KB	2025-12-18 20:59	EDIT
📄 pointer.h	H	19.6 KB	2025-12-18 20:59	EDIT
📄 pool_allocator.h	H	8.8 KB	2025-12-18 20:59	EDIT
📄 random	?	112.1 KB	2025-12-18 20:59	EDIT
📄 random.tcc	TCC	59 KB	2025-12-18 20:59	EDIT
📄 rb_tree	?	3.3 KB	2025-12-18 20:59	EDIT
📄 rc_string_base.h	H	23.3 KB	2025-12-18 20:59	EDIT
📄 rope	?	87.6 KB	2025-12-18 20:59	EDIT
📄 ropeimpl.h	H	47.8 KB	2025-12-18 20:59	EDIT
📄 slist	?	29.3 KB	2025-12-18 20:59	EDIT
📄 sso_string_base.h	H	16.1 KB	2025-12-18 20:59	EDIT
📄 stdio_filebuf.h	H	5.6 KB	2025-12-18 20:59	EDIT
📄 stdio_sync_filebuf.h	H	8.6 KB	2025-12-18 20:59	EDIT
📄 string_conversions.h	H	3.6 KB	2025-12-18 20:59	EDIT
📄 throw_allocator.h	H	25.5 KB	2025-12-18 20:59	EDIT
📄 type_traits.h	H	7.1 KB	2025-12-18 20:59	EDIT
📄 typelist.h	H	16.1 KB	2025-12-18 20:59	EDIT
📄 vstring.h	H	107.7 KB	2025-12-18 20:59	EDIT
📄 vstring.tcc	TCC	23.1 KB	2025-12-18 20:59	EDIT
📄 vstring_fwd.h	H	3.1 KB	2025-12-18 20:59	EDIT
📄 vstring_util.h	H	5.8 KB	2025-12-18 20:59	EDIT