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// RTTI support for -*- C++ -*-
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// Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002
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// Free Software Foundation
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// This file is part of GNU CC.
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// GNU CC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2, or (at your option)
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// GNU CC 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
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// along with GNU CC; see the file COPYING. If not, write to
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// the Free Software Foundation, 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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* This header provides RTTI support.
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class __class_type_info;
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} // namespace __cxxabiv1
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// If weak symbols are not supported, typeinfo names are not merged.
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#define __GXX_MERGED_TYPEINFO_NAMES 0
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// On platforms that support weak symbols, typeinfo names are merged.
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#define __GXX_MERGED_TYPEINFO_NAMES 1
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* @brief Part of RTTI.
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* The @c type_info class describes type information generated by
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/** Destructor. Being the first non-inline virtual function, this
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* controls in which translation unit the vtable is emitted. The
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* compiler makes use of that information to know where to emit
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* the runtime-mandated type_info structures in the new-abi. */
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/// Assigning type_info is not supported. Made private.
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type_info& operator=(const type_info&);
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type_info(const type_info&);
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explicit type_info(const char *__n): __name(__n) { }
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// the public interface
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/** Returns an @e implementation-defined byte string; this is not
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* portable between compilers! */
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const char* name() const
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#if !__GXX_MERGED_TYPEINFO_NAMES
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bool before(const type_info& __arg) const;
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// In old abi, or when weak symbols are not supported, there can
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// be multiple instances of a type_info object for one
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// type. Uniqueness must use the _name value, not object address.
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bool operator==(const type_info& __arg) const;
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/** Returns true if @c *this precedes @c __arg in the implementation's
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// In new abi we can rely on type_info's NTBS being unique,
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// and therefore address comparisons are sufficient.
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bool before(const type_info& __arg) const
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{ return __name < __arg.__name; }
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bool operator==(const type_info& __arg) const
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{ return __name == __arg.__name; }
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bool operator!=(const type_info& __arg) const
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{ return !operator==(__arg); }
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// the internal interface
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// return true if this is a pointer type of some kind
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virtual bool __is_pointer_p() const;
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// return true if this is a function type
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virtual bool __is_function_p() const;
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// Try and catch a thrown type. Store an adjusted pointer to the
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// caught type in THR_OBJ. If THR_TYPE is not a pointer type, then
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// THR_OBJ points to the thrown object. If THR_TYPE is a pointer
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// type, then THR_OBJ is the pointer itself. OUTER indicates the
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// number of outer pointers, and whether they were const
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virtual bool __do_catch(const type_info *__thr_type, void **__thr_obj,
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unsigned __outer) const;
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// internally used during catch matching
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virtual bool __do_upcast(const __cxxabiv1::__class_type_info *__target,
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void **__obj_ptr) const;
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* @brief Thrown during incorrect typecasting.
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* If you attempt an invalid @c dynamic_cast expression, an instance of
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* this class (or something derived from this class) is thrown. */
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class bad_cast : public exception
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bad_cast() throw() { }
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// This declaration is not useless:
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// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
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virtual ~bad_cast() throw();
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/** If you use a NULL pointer in a @c typeid expression, this is thrown. */
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class bad_typeid : public exception
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bad_typeid () throw() { }
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// This declaration is not useless:
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// http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
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virtual ~bad_typeid() throw();
added
removed
src/utility/typeinfo
