19 lines
528 B
Python

#!/usr/bin/env python2
# vim:fileencoding=utf-8
from __future__ import absolute_import, division, print_function, unicode_literals
__license__ = 'GPL v3'
__copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
class SelectorError(ValueError):
"""Common parent for SelectorSyntaxError and ExpressionError"""
class SelectorSyntaxError(SelectorError):
"""Parsing a selector that does not match the grammar."""
class ExpressionError(SelectorError):
"""Unknown or unsupported selector (eg. pseudo-class)."""