text: 
  
  /*
   * MIT License
   *
   * Copyright (c) 2017 Hiroki SHIROKURA
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  /**
   * @file   slankdev/exception.h
   * @brief  exception class
   * @author Hiroki SHIROKURA
   * @date   2017.9.3
   */
  
  #pragma once
  #include <string>
  #include <exception>
  #include <sstream>
  #include <ostream>
  
  #define NI(str) slankdev::exception("notimplement "#str);
  
  namespace slankdev {
  
  class exception : public std::exception {
   private:
    std::string str;
   public:
    explicit exception(const char* s="") noexcept {
      str = s;
    }
    exception(std::string s) noexcept {
      str = s;
    }
    template<class T>
      exception& operator<<(const T& t) noexcept {
        std::ostringstream os;
        os << " " << t ;
        str += os.str();
        return *this;
      }
    const char* what() const noexcept {
      return str.c_str();
    }
  };
  
  } /* namespace slankdev */
  
  
  
  