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1# Copyright 2014 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5class Error(Exception):
6  """Base class for Mojo IDL bindings parser/generator errors."""
7
8  def __init__(self, filename, message, lineno=None, addenda=None, **kwargs):
9    """|filename| is the (primary) file which caused the error, |message| is the
10    error message, |lineno| is the 1-based line number (or |None| if not
11    applicable/available), and |addenda| is a list of additional lines to append
12    to the final error message."""
13    Exception.__init__(self, **kwargs)
14    self.filename = filename
15    self.message = message
16    self.lineno = lineno
17    self.addenda = addenda
18
19  def __str__(self):
20    if self.lineno:
21      s = "%s:%d: Error: %s" % (self.filename, self.lineno, self.message)
22    else:
23      s = "%s: Error: %s" % (self.filename, self.message)
24    return "\n".join([s] + self.addenda) if self.addenda else s
25
26  def __repr__(self):
27    return str(self)
28