llvm-project/libcxx/include/typeinfo

// -*- C++ -*-
//===-------------------------- typeinfo ----------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef __LIBCPP_TYPEINFO
#define __LIBCPP_TYPEINFO

/*

    typeinfo synopsis

namespace std {

class type_info
{
public:
    virtual ~type_info();

    bool operator==(const type_info& rhs) const;
    bool operator!=(const type_info& rhs) const;

    bool before(const type_info& rhs) const;
    size_t hash_code() const throw();
    const char* name() const;

    type_info(const type_info& rhs) = delete;
    type_info& operator=(const type_info& rhs) = delete;
};

class bad_cast
    : public exception
{
public:
    bad_cast() throw();
    bad_cast(const bad_cast&) throw();
    bad_cast& operator=(const bad_cast&) throw();
    virtual const char* what() const throw();
};

class bad_typeid
    : public exception
{
public:
    bad_typeid() throw();
    bad_typeid(const bad_typeid&) throw();
    bad_typeid& operator=(const bad_typeid&) throw();
    virtual const char* what() const throw();
};

}  // std

*/

#include <__config>
#include <exception>
#include <cstddef>

#pragma GCC system_header

namespace std  // purposefully not using versioning namespace
{

class _LIBCPP_EXCEPTION_ABI type_info
{
    type_info& operator=(const type_info&);
    type_info(const type_info&);
protected:
    const char* __type_name;

    _LIBCPP_INLINE_VISIBILITY
    explicit type_info(const char* __n)
        : __type_name(__n) {}

public:
    virtual ~type_info();

    _LIBCPP_INLINE_VISIBILITY
    const char* name() const {return __type_name;}

    _LIBCPP_INLINE_VISIBILITY
    bool before(const type_info& __arg) const
        {return __type_name < __arg.__type_name;}
    _LIBCPP_INLINE_VISIBILITY
    size_t hash_code() const throw()
        {return *reinterpret_cast<const size_t*>(&__type_name);}

    _LIBCPP_INLINE_VISIBILITY
    bool operator==(const type_info& __arg) const
        {return __type_name == __arg.__type_name;}
    _LIBCPP_INLINE_VISIBILITY
    bool operator!=(const type_info& __arg) const
        {return !operator==(__arg);}

};

class _LIBCPP_EXCEPTION_ABI bad_cast
    : public exception
{
public:
    bad_cast() throw();
    virtual ~bad_cast() throw();
    virtual const char* what() const throw();
};

class _LIBCPP_EXCEPTION_ABI bad_typeid
    : public exception
{
public:
    bad_typeid() throw();
    virtual ~bad_typeid() throw();
    virtual const char* what() const throw();
};

}  // std

#endif  // __LIBCPP_TYPEINFO