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// RTTI support for -*- C++ -*-

// Copyright (C) 1994-2013 Free Software Foundation, Inc.

//

// 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

// .

/** @file typeinfo

 *  This is a Standard C++ Library header.

 */

#ifndef _TYPEINFO

#define _TYPEINFO

#pragma GCC system_header

#include 

#if __cplusplus >= 201103L

#include 

#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 _GLIBCXX_NOEXCEPT

    { 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 _GLIBCXX_NOEXCEPT;

    bool operator==(const type_info& __arg) const _GLIBCXX_NOEXCEPT;

#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 _GLIBCXX_NOEXCEPT

    { return (__name[0] == '*' && __arg.__name[0] == '*')

	? __name < __arg.__name

	: __builtin_strcmp (__name, __arg.__name) < 0; }

    bool operator==(const type_info& __arg) const _GLIBCXX_NOEXCEPT

    {

      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 _GLIBCXX_NOEXCEPT

    { return __name < __arg.__name; }

    bool operator==(const type_info& __arg) const _GLIBCXX_NOEXCEPT

    { return __name == __arg.__name; }

  #endif

#endif

    bool operator!=(const type_info& __arg) const _GLIBCXX_NOEXCEPT

    { return !operator==(__arg); }

#if __cplusplus >= 201103L

    size_t hash_code() const noexcept

    {

#  if !__GXX_MERGED_TYPEINFO_NAMES

      return _Hash_bytes(name(), __builtin_strlen(name()),

			 static_cast(0xc70f6907UL));

#  else

      return reinterpret_cast(__name);

#  endif

    }

#endif // C++11

    // 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