diff options
Diffstat (limited to 'misc/uClibc++/include/cxx/typeinfo')
-rw-r--r-- | misc/uClibc++/include/cxx/typeinfo | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/misc/uClibc++/include/cxx/typeinfo b/misc/uClibc++/include/cxx/typeinfo new file mode 100644 index 000000000..88a2639b8 --- /dev/null +++ b/misc/uClibc++/include/cxx/typeinfo @@ -0,0 +1,156 @@ +// RTTI support for -*- C++ -*- +// Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002 +// Free Software Foundation +// +// This file is part of GNU CC. +// +// GNU CC 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 2, or (at your option) +// any later version. +// +// GNU CC 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. +// +// You should have received a copy of the GNU General Public License +// along with GNU CC; see the file COPYING. If not, write to +// the Free Software Foundation, 59 Temple Place - Suite 330, +// Boston, MA 02111-1307, USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/** @file typeinfo + * This header provides RTTI support. + */ + +#ifndef __TYPEINFO__ +#define __TYPEINFO__ + +#include <exception> + +extern "C++" { + +namespace __cxxabiv1 +{ + class __class_type_info; +} // namespace __cxxabiv1 + +#if !__GXX_WEAK__ + // If weak symbols are not supported, typeinfo names are not merged. + #define __GXX_MERGED_TYPEINFO_NAMES 0 +#else + // On platforms that support weak symbols, typeinfo names are merged. + #define __GXX_MERGED_TYPEINFO_NAMES 1 +#endif + +namespace std +{ + /** + * @brief Part of RTTI. + * + * The @c type_info class describes type information generated by + * an implementation. + */ + class type_info + { + public: + /** Destructor. Being the first non-inline virtual function, this + * controls in which translation unit the vtable is emitted. The + * compiler makes use of that information to know where to emit + * the runtime-mandated type_info structures in the new-abi. */ + virtual ~type_info(); + + private: + /// Assigning type_info is not supported. Made private. + type_info& operator=(const type_info&); + type_info(const type_info&); + + protected: + const char *__name; + + protected: + explicit type_info(const char *__n): __name(__n) { } + + public: + // the public interface + /** Returns an @e implementation-defined byte string; this is not + * portable between compilers! */ + const char* name() const + { return __name; } + +#if !__GXX_MERGED_TYPEINFO_NAMES + bool before(const type_info& __arg) const; + // In old abi, or when weak symbols are not supported, there can + // be multiple instances of a type_info object for one + // type. Uniqueness must use the _name value, not object address. + bool operator==(const type_info& __arg) const; +#else + /** Returns true if @c *this precedes @c __arg in the implementation's + * collation order. */ + // In new abi we can rely on type_info's NTBS being unique, + // and therefore address comparisons are sufficient. + bool before(const type_info& __arg) const + { return __name < __arg.__name; } + bool operator==(const type_info& __arg) const + { return __name == __arg.__name; } +#endif + bool operator!=(const type_info& __arg) const + { return !operator==(__arg); } + + // the internal interface + public: + // return true if this is a pointer type of some kind + virtual bool __is_pointer_p() const; + // return true if this is a function type + virtual bool __is_function_p() const; + + // Try and catch a thrown type. Store an adjusted pointer to the + // caught type in THR_OBJ. If THR_TYPE is not a pointer type, then + // THR_OBJ points to the thrown object. If THR_TYPE is a pointer + // type, then THR_OBJ is the pointer itself. OUTER indicates the + // number of outer pointers, and whether they were const + // qualified. + virtual bool __do_catch(const type_info *__thr_type, void **__thr_obj, + unsigned __outer) const; + + // internally used during catch matching + virtual bool __do_upcast(const __cxxabiv1::__class_type_info *__target, + void **__obj_ptr) const; + }; + + /** + * @brief Thrown during incorrect typecasting. + * + * If you attempt an invalid @c dynamic_cast expression, an instance of + * this class (or something derived from this class) is thrown. */ + class bad_cast : public exception + { + public: + bad_cast() throw() { } + // This declaration is not useless: + // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 + virtual ~bad_cast() throw(); + }; + + /** If you use a NULL pointer in a @c typeid expression, this is thrown. */ + class bad_typeid : public exception + { + public: + bad_typeid () throw() { } + // This declaration is not useless: + // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 + virtual ~bad_typeid() throw(); + }; +} // namespace std + +} // extern "C++" +#endif |