TreeException.hh

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/****************************************************
 * @file TreeException.hh
 * @author Guorui Wei (313017602@qq.com)
 * @brief 树的异常类
 * @version 0.1
 * @date 2020-04-19
 * 
 * @copyright Copyright (c) 2020
 * 
 * See the file LICENSE in the top directory of this distribution for
 * more information.
 * 
 ****************************************************/
 
#ifndef INCLUDE_TREEEXCEPTION_HH_
#define INCLUDE_TREEEXCEPTION_HH_
 
#include <exception>
#include <string>
 
namespace Tree
{
 
class TreeException : public std::exception
{
public:
    TreeException(const std::string &text = "undefined exception",
                  const std::string &id = "undefined",
                  const std::string &td = "Generic ArgException")
        : std::exception(),
          _errorText(text),
          _argId(id),
          _typeDescription(td) {}
 
    virtual ~TreeException() noexcept {}
 
    std::string error() const { return (_errorText); }
 
    std::string argId() const
    {
        if (_argId == "undefined")
            return " ";
        else
            return ("Argument: " + _argId);
    }
 
    const char *what() const noexcept
    {
        static std::string ex;
        ex = _argId + " -- " + _errorText;
        return ex.c_str();
    }
 
    std::string typeDescription() const { return _typeDescription; }
 
private:
    std::string _errorText;
 
    std::string _argId;
 
    std::string _typeDescription;
};
} // namespace Tree
 
#endif /* INCLUDE_TREEEXCEPTION_HH_ */