def StringEscape(self, string, match, **_):
"""Escape backslashes found inside a string quote.
Backslashes followed by anything other than ['"rnbt] will just be included
in the string.
Args:
string: The string that matched.
match: The match object (m.group(1) is the escaped code)
"""
precondition.AssertType(string, Text)
if match.group(1) in "'\"rnbt":
self.string += compatibility.UnescapeString(string)
else:
self.string += string
def StringEscape(self, string, match, **_):
"""Escape backslashes found inside a string quote.
Backslashes followed by anything other than [\'"rnbt] will raise an Error.
Args:
string: The string that matched.
match: The match object (m.group(1) is the escaped code)
Raises:
ParseError: For strings other than those used to define a regexp, raise an
error if the escaped string is not one of [\'"rnbt].
"""
precondition.AssertType(string, Text)
# Allow unfiltered strings for regexp operations so that escaped special
# characters (e.g. \*) or special sequences (e.g. \w) can be used in
# objectfilter.
if self.current_expression.operator == "regexp":
self.string += compatibility.UnescapeString(string)
elif match.group(1) in "\\'\"rnbt":
self.string += compatibility.UnescapeString(string)
else:
raise ParseError("Invalid escape character %s." % string)
def testMany(self):
self.assertEqual(compatibility.UnescapeString("foo\\n\\'bar\\'\nbaz"),
"foo\n'bar'\nbaz")
def testQuotemark(self):
self.assertEqual(compatibility.UnescapeString("\\'"), "'")
self.assertEqual(compatibility.UnescapeString("\\\""), "\"")
def testWhitespace(self):
self.assertEqual(compatibility.UnescapeString("\\n"), "\n")
self.assertEqual(compatibility.UnescapeString("\\r"), "\r")