exception.hpp

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/*
  Copyright (C) 2017 Marcus N Campbell Bannerman <[email protected]>

  This file is part of stator.

  stator 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 of the License, or
  (at your option) any later version.

  stator 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.

  You should have received a copy of the GNU General Public License
  along with stator. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

// C++
#include <exception>
#include <sstream>

#define stator_throw()                  \
  throw stator::Exception(__LINE__,__FILE__, __func__)

namespace stator {
  class Exception : public std::exception {
   public:
    Exception(int line, const char* file, const char* funcname) throw() :
      message_(), messageStr_() {

      message_ << "Exception thrown in [" << funcname << "] (" << file <<
         ":" << line << ")" << std::endl;
    }

    Exception(const Exception& e) : message_(e.message_.str()), messageStr_() {
    }

    inline ~Exception() throw() {}

    template<class T>
    Exception& operator<<(const T& m) {
      message_ << m;
      return *this;
    }

    const char* what() const throw() {
      messageStr_ = message_.str();
      return messageStr_.c_str();
    }

   private:
    std::ostringstream message_;
    mutable std::string messageStr_;
  };
} // namespace stator