168 lines
4.5 KiB
C++
168 lines
4.5 KiB
C++
// Methods for type_info for -*- C++ -*- Run Time Type Identification.
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// Copyright (C) 1994, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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// Free Software Foundation
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//
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// This file is part of GCC.
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//
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// GCC 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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// GCC 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 GCC; see the file COPYING. If not, write to
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// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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// Boston, MA 02110-1301, 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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#include <cstddef>
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#include "tinfo.h"
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#include "new" // for placement new
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// We can't rely on having stdlib.h if we're freestanding.
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extern "C" void abort ();
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using std::type_info;
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#if !__GXX_MERGED_TYPEINFO_NAMES
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bool
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type_info::before (const type_info &arg) const
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{
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return __builtin_strcmp (name (), arg.name ()) < 0;
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}
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#endif
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#include <cxxabi.h>
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namespace __cxxabiv1 {
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using namespace std;
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// This has special meaning to the compiler, and will cause it
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// to emit the type_info structures for the fundamental types which are
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// mandated to exist in the runtime.
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__fundamental_type_info::
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~__fundamental_type_info ()
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{}
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__array_type_info::
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~__array_type_info ()
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{}
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__function_type_info::
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~__function_type_info ()
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{}
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__enum_type_info::
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~__enum_type_info ()
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{}
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__pbase_type_info::
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~__pbase_type_info ()
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{}
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__pointer_type_info::
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~__pointer_type_info ()
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{}
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__pointer_to_member_type_info::
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~__pointer_to_member_type_info ()
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{}
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bool __pointer_type_info::
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__is_pointer_p () const
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{
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return true;
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}
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bool __function_type_info::
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__is_function_p () const
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{
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return true;
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}
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bool __pbase_type_info::
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__do_catch (const type_info *thr_type,
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void **thr_obj,
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unsigned outer) const
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{
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if (*this == *thr_type)
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return true; // same type
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if (typeid (*this) != typeid (*thr_type))
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return false; // not both same kind of pointers
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if (!(outer & 1))
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// We're not the same and our outer pointers are not all const qualified
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// Therefore there must at least be a qualification conversion involved
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// But for that to be valid, our outer pointers must be const qualified.
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return false;
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const __pbase_type_info *thrown_type =
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static_cast <const __pbase_type_info *> (thr_type);
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if (thrown_type->__flags & ~__flags)
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// We're less qualified.
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return false;
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if (!(__flags & __const_mask))
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outer &= ~1;
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return __pointer_catch (thrown_type, thr_obj, outer);
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}
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inline bool __pbase_type_info::
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__pointer_catch (const __pbase_type_info *thrown_type,
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void **thr_obj,
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unsigned outer) const
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{
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return __pointee->__do_catch (thrown_type->__pointee, thr_obj, outer + 2);
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}
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bool __pointer_type_info::
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__pointer_catch (const __pbase_type_info *thrown_type,
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void **thr_obj,
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unsigned outer) const
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{
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if (outer < 2 && *__pointee == typeid (void))
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{
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// conversion to void
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return !thrown_type->__pointee->__is_function_p ();
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}
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return __pbase_type_info::__pointer_catch (thrown_type, thr_obj, outer);
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}
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bool __pointer_to_member_type_info::
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__pointer_catch (const __pbase_type_info *thr_type,
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void **thr_obj,
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unsigned outer) const
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{
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// This static cast is always valid, as our caller will have determined that
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// thr_type is really a __pointer_to_member_type_info.
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const __pointer_to_member_type_info *thrown_type =
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static_cast <const __pointer_to_member_type_info *> (thr_type);
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if (*__context != *thrown_type->__context)
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return false; // not pointers to member of same class
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return __pbase_type_info::__pointer_catch (thrown_type, thr_obj, outer);
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}
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} // namespace std
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