bad_boxed_cast.hpp

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// This file is distributed under the BSD License.
// See "license.txt" for details.
// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
// Copyright 2009-2017, Jason Turner (jason@emptycrate.com)
// http://www.chaiscript.com
 
// This is an open source non-commercial project. Dear PVS-Studio, please check it.
// PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
 
 
#ifndef CHAISCRIPT_BAD_BOXED_CAST_HPP_
#define CHAISCRIPT_BAD_BOXED_CAST_HPP_
 
#include <string>
#include <typeinfo>
 
#include "../chaiscript_defines.hpp"
#include "type_info.hpp"
 
namespace chaiscript {
class Type_Info;
}  // namespace chaiscript
 
namespace chaiscript 
{
  namespace exception
  {
    class bad_boxed_cast : public std::bad_cast
    {
      public:
        bad_boxed_cast(Type_Info t_from, const std::type_info &t_to,
            std::string t_what) noexcept
          : from(t_from), to(&t_to), m_what(std::move(t_what))
        {
        }
 
        bad_boxed_cast(Type_Info t_from, const std::type_info &t_to)
          : from(t_from), to(&t_to), m_what("Cannot perform boxed_cast: " + t_from.name() + " to: " + t_to.name())
        {
        }
 
        explicit bad_boxed_cast(std::string t_what) noexcept
          : m_what(std::move(t_what))
        {
        }
 
        bad_boxed_cast(const bad_boxed_cast &) = default;
        ~bad_boxed_cast() noexcept override = default;

        const char * what() const noexcept override
        {
          return m_what.c_str();
        }
 
        Type_Info from; 
        const std::type_info *to = nullptr; 
 
      private:
        std::string m_what;
    };
  }
}
 
 
 
#endif