/*
 * Copyright (c) 2003-2009, John Wiegley.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of New Artisans LLC nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @addtogroup util
 */

/**
 * @file   error.h
 * @author John Wiegley
 *
 * @ingroup util
 *
 * @brief Brief
 *
 * Long.
 */
#ifndef _ERROR_H
#define _ERROR_H

namespace ledger {

extern std::ostringstream _desc_buffer;

template <typename T>
inline void throw_func(const string& message) {
  _desc_buffer.str("");
  throw T(message);
}

#define throw_(cls, msg)					\
  ((_desc_buffer << msg), throw_func<cls>(_desc_buffer.str()))

extern std::ostringstream _ctxt_buffer;

#define add_error_context(msg)					\
  ((long(_ctxt_buffer.tellp()) == 0) ?				\
   (_ctxt_buffer << msg) : (_ctxt_buffer << std::endl << msg))

string error_context();

string file_context(const path& file, std::size_t line);
string line_context(const string&    line,
		    istream_pos_type pos     = istream_pos_type(0),
		    istream_pos_type end_pos = istream_pos_type(0));

#define DECLARE_EXCEPTION(name, kind)				\
  class name : public kind {					\
  public:							\
  explicit name(const string& why) throw() : kind(why) {}	\
  virtual ~name() throw() {}					\
  }

} // namespace ledger

#endif // _ERROR_H