]>
Commit | Line | Data |
---|---|---|
9ab916b8 RH |
1 | // RTTI support for -*- C++ -*- |
2 | // Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000 Free Software Foundation | |
3 | ||
4 | // This file is part of GNU CC. | |
5 | // | |
6 | // GNU CC is free software; you can redistribute it and/or modify | |
7 | // it under the terms of the GNU General Public License as published by | |
8 | // the Free Software Foundation; either version 2, or (at your option) | |
9 | // any later version. | |
10 | // | |
11 | // GNU CC is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | // | |
16 | // You should have received a copy of the GNU General Public License | |
17 | // along with GNU CC; see the file COPYING. If not, write to | |
18 | // the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | // Boston, MA 02111-1307, USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | // __GXX_ABI_VERSION distinguishes the ABI that is being used. Values <100 | |
31 | // indicate the `old' abi, which grew as C++ was defined. Values >=100 | |
32 | // indicate the `new' abi, which is a cross vendor C++ abi, documented at | |
33 | // `http://reality.sgi.com/dehnert_engr/cxx/'. | |
34 | ||
35 | #ifndef __TYPEINFO__ | |
36 | #define __TYPEINFO__ | |
37 | ||
38 | #pragma interface "typeinfo" | |
39 | ||
40 | #include <exception> | |
41 | ||
42 | extern "C++" { | |
43 | ||
44 | #if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 | |
45 | namespace __cxxabiv1 | |
46 | { | |
47 | class __class_type_info; | |
48 | } // namespace __cxxabiv1 | |
49 | #endif | |
50 | ||
51 | namespace std { | |
52 | ||
53 | class type_info { | |
54 | public: | |
55 | // Destructor. Being the first non-inline virtual function, this controls in | |
56 | // which translation unit the vtable is emitted. The compiler makes use of | |
57 | // that information to know where to emit the runtime-mandated type_info | |
58 | // structures in the new-abi. | |
59 | virtual ~type_info (); | |
60 | ||
61 | private: | |
62 | // Assigning type_info is not supported. made private. | |
63 | type_info& operator= (const type_info&); | |
64 | type_info (const type_info&); | |
65 | ||
66 | protected: | |
67 | const char *__name; | |
68 | ||
69 | protected: | |
70 | explicit type_info (const char *__n): __name (__n) { } | |
71 | ||
72 | public: | |
73 | // the public interface | |
74 | #if !defined(__GXX_ABI_VERSION) || __GXX_ABI_VERSION < 100 | |
75 | // In old abi, there can be multiple instances of a type_info object for one | |
76 | // type. Uniqueness must use the _name value, not object address. | |
77 | bool before (const type_info& arg) const; | |
78 | const char* name () const | |
79 | { return __name; } | |
80 | bool operator== (const type_info& __arg) const; | |
81 | bool operator!= (const type_info& __arg) const | |
82 | { return !operator== (__arg); } | |
83 | ||
84 | #else | |
85 | // In new abi we can rely on type_info's NTBS being unique, | |
86 | // and therefore address comparisons are sufficient. | |
87 | bool before (const type_info& __arg) const | |
88 | { return __name < __arg.__name; } | |
89 | const char* name () const | |
90 | { return __name; } | |
91 | bool operator== (const type_info& __arg) const | |
92 | { return __name == __arg.__name; } | |
93 | bool operator!= (const type_info& __arg) const | |
94 | { return !operator== (__arg); } | |
95 | #endif | |
96 | ||
97 | // the internal interface | |
98 | #if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 | |
99 | public: | |
100 | // return true if this is a pointer type of some kind | |
101 | virtual bool __is_pointer_p () const; | |
102 | // return true if this is a function type | |
103 | virtual bool __is_function_p () const; | |
104 | ||
105 | // Try and catch a thrown type. Store an adjusted pointer to the caught type | |
106 | // in THR_OBJ. If THR_TYPE is not a pointer type, then THR_OBJ points to the | |
107 | // thrown object. If THR_TYPE is a pointer type, then THR_OBJ is the pointer | |
108 | // itself. OUTER indicates the number of outer pointers, and whether they | |
109 | // were const qualified. | |
110 | virtual bool __do_catch (const type_info *__thr_type, void **__thr_obj, | |
111 | unsigned __outer) const; | |
112 | ||
113 | // internally used during catch matching | |
114 | virtual bool __do_upcast (const __cxxabiv1::__class_type_info *__target, | |
115 | void **__obj_ptr) const; | |
116 | #endif | |
117 | }; | |
118 | ||
119 | class bad_cast : public exception { | |
120 | public: | |
121 | bad_cast() { } | |
122 | virtual ~bad_cast() { } | |
123 | }; | |
124 | ||
125 | class bad_typeid : public exception { | |
126 | public: | |
127 | bad_typeid () { } | |
128 | virtual ~bad_typeid () { } | |
129 | }; | |
130 | ||
131 | } // namespace std | |
132 | ||
133 | } // extern "C++" | |
134 | #endif |