--- /dev/null
+// RTTI support for -*- C++ -*-
+// Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+// 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012
+// Free Software Foundation
+//
+// This file is part of GCC.
+//
+// GCC 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 3, or (at your option)
+// any later version.
+//
+// GCC 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.
+//
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file typeinfo
+ * This is a Standard C++ Library header.
+ */
+
+#ifndef _TYPEINFO
+#define _TYPEINFO
+
+#pragma GCC system_header
+
+#include <exception>
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+#include <bits/hash_bytes.h>
+#endif
+
+#pragma GCC visibility push(default)
+
+extern "C++" {
+
+namespace __cxxabiv1
+{
+ class __class_type_info;
+} // namespace __cxxabiv1
+
+// Determine whether typeinfo names for the same type are merged (in which
+// case comparison can just compare pointers) or not (in which case strings
+// must be compared), and whether comparison is to be implemented inline or
+// not. We used to do inline pointer comparison by default if weak symbols
+// are available, but even with weak symbols sometimes names are not merged
+// when objects are loaded with RTLD_LOCAL, so now we always use strcmp by
+// default. For ABI compatibility, we do the strcmp inline if weak symbols
+// are available, and out-of-line if not. Out-of-line pointer comparison
+// is used where the object files are to be portable to multiple systems,
+// some of which may not be able to use pointer comparison, but the
+// particular system for which libstdc++ is being built can use pointer
+// comparison; in particular for most ARM EABI systems, where the ABI
+// specifies out-of-line comparison. The compiler's target configuration
+// can override the defaults by defining __GXX_TYPEINFO_EQUALITY_INLINE to
+// 1 or 0 to indicate whether or not comparison is inline, and
+// __GXX_MERGED_TYPEINFO_NAMES to 1 or 0 to indicate whether or not pointer
+// comparison can be used.
+
+#ifndef __GXX_MERGED_TYPEINFO_NAMES
+// By default, typeinfo names are not merged.
+#define __GXX_MERGED_TYPEINFO_NAMES 0
+#endif
+
+// By default follow the old inline rules to avoid ABI changes.
+#ifndef __GXX_TYPEINFO_EQUALITY_INLINE
+ #if !__GXX_WEAK__
+ #define __GXX_TYPEINFO_EQUALITY_INLINE 0
+ #else
+ #define __GXX_TYPEINFO_EQUALITY_INLINE 1
+ #endif
+#endif
+
+namespace std
+{
+ /**
+ * @brief Part of RTTI.
+ *
+ * The @c type_info class describes type information generated by
+ * an implementation.
+ */
+ class type_info
+ {
+ public:
+ /** Destructor first. 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();
+
+ /** Returns an @e implementation-defined byte string; this is not
+ * portable between compilers! */
+ const char* name() const
+ { return __name[0] == '*' ? __name + 1 : __name; }
+
+#if !__GXX_TYPEINFO_EQUALITY_INLINE
+ // 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 before(const type_info& __arg) const;
+ bool operator==(const type_info& __arg) const;
+#else
+ #if !__GXX_MERGED_TYPEINFO_NAMES
+ /** Returns true if @c *this precedes @c __arg in the implementation's
+ * collation order. */
+ // Even with the new abi, on systems that support dlopen
+ // we can run into cases where type_info names aren't merged,
+ // so we still need to do string comparison.
+ bool before(const type_info& __arg) const
+ { return (__name[0] == '*' && __arg.__name[0] == '*')
+ ? __name < __arg.__name
+ : __builtin_strcmp (__name, __arg.__name) < 0; }
+
+ bool operator==(const type_info& __arg) const
+ {
+ return ((__name == __arg.__name)
+ || (__name[0] != '*' &&
+ __builtin_strcmp (__name, __arg.__name) == 0));
+ }
+ #else
+ // On some targets 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
+#endif
+ bool operator!=(const type_info& __arg) const
+ { return !operator==(__arg); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ size_t hash_code() const noexcept
+ {
+# if !__GXX_MERGED_TYPEINFO_NAMES
+ return _Hash_bytes(name(), __builtin_strlen(name()),
+ static_cast<size_t>(0xc70f6907UL));
+# else
+ return reinterpret_cast<size_t>(__name);
+# endif
+ }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+ // 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;
+
+ protected:
+ const char *__name;
+
+ explicit type_info(const char *__n): __name(__n) { }
+
+ private:
+ /// Assigning type_info is not supported.
+ type_info& operator=(const type_info&);
+ type_info(const type_info&);
+ };
+
+ /**
+ * @brief Thrown during incorrect typecasting.
+ * @ingroup exceptions
+ *
+ * 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() _GLIBCXX_USE_NOEXCEPT { }
+
+ // This declaration is not useless:
+ // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
+ virtual ~bad_cast() _GLIBCXX_USE_NOEXCEPT;
+
+ // See comment in eh_exception.cc.
+ virtual const char* what() const _GLIBCXX_USE_NOEXCEPT;
+ };
+
+ /**
+ * @brief Thrown when a NULL pointer in a @c typeid expression is used.
+ * @ingroup exceptions
+ */
+ class bad_typeid : public exception
+ {
+ public:
+ bad_typeid () _GLIBCXX_USE_NOEXCEPT { }
+
+ // This declaration is not useless:
+ // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
+ virtual ~bad_typeid() _GLIBCXX_USE_NOEXCEPT;
+
+ // See comment in eh_exception.cc.
+ virtual const char* what() const _GLIBCXX_USE_NOEXCEPT;
+ };
+} // namespace std
+
+} // extern "C++"
+
+#pragma GCC visibility pop
+
+#endif
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