text: # Copyright 2014 The Chromium Authors. All rights reserved.
  # Use of this source code is governed by a BSD-style license that can be
  # found in the LICENSE file.
  
  class Error(Exception):
    """Base class for Mojo IDL bindings parser/generator errors."""
  
    def __init__(self, filename, message, lineno=None, addenda=None, **kwargs):
      """|filename| is the (primary) file which caused the error, |message| is the
      error message, |lineno| is the 1-based line number (or |None| if not
      applicable/available), and |addenda| is a list of additional lines to append
      to the final error message."""
      Exception.__init__(self, **kwargs)
      self.filename = filename
      self.message = message
      self.lineno = lineno
      self.addenda = addenda
  
    def __str__(self):
      if self.lineno:
        s = "%s:%d: Error: %s" % (self.filename, self.lineno, self.message)
      else:
        s = "%s: Error: %s" % (self.filename, self.message)
      return "\n".join([s] + self.addenda) if self.addenda else s
  
    def __repr__(self):
      return str(self)
  