135 lines
4.4 KiB
C++
135 lines
4.4 KiB
C++
// RTTI support for -*- C++ -*-
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// Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000 Free Software Foundation
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// This file is part of GNU CC.
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//
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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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// any later version.
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//
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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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//
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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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// __GXX_ABI_VERSION distinguishes the ABI that is being used. Values <100
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// indicate the `old' abi, which grew as C++ was defined. Values >=100
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// indicate the `new' abi, which is a cross vendor C++ abi, documented at
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// `http://reality.sgi.com/dehnert_engr/cxx/'.
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#ifndef __TYPEINFO__
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#define __TYPEINFO__
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#pragma interface "typeinfo"
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#include <exception>
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extern "C++" {
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#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100
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namespace __cxxabiv1
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{
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class __class_type_info;
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} // namespace __cxxabiv1
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#endif
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namespace std {
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class type_info {
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public:
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// Destructor. Being the first non-inline virtual function, this controls in
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// which translation unit the vtable is emitted. The compiler makes use of
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// that information to know where to emit the runtime-mandated type_info
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// structures in the new-abi.
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virtual ~type_info ();
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private:
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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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protected:
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const char *__name;
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protected:
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explicit type_info (const char *__n): __name (__n) { }
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public:
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// the public interface
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#if !defined(__GXX_ABI_VERSION) || __GXX_ABI_VERSION < 100
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// In old abi, there can 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 before (const type_info& arg) const;
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const char* name () const
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{ return __name; }
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bool operator== (const type_info& __arg) const;
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bool operator!= (const type_info& __arg) const
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{ return !operator== (__arg); }
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#else
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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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const char* name () const
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{ return __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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#endif
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// the internal interface
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#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100
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public:
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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 caught type
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// in THR_OBJ. If THR_TYPE is not a pointer type, then THR_OBJ points to the
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// thrown object. If THR_TYPE is a pointer type, then THR_OBJ is the pointer
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// itself. OUTER indicates the number of outer pointers, and whether they
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// were const qualified.
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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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#endif
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};
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class bad_cast : public exception {
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public:
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bad_cast() { }
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virtual ~bad_cast() { }
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};
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class bad_typeid : public exception {
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public:
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bad_typeid () { }
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virtual ~bad_typeid () { }
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};
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} // namespace std
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} // extern "C++"
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#endif
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