def parse_escape_sequence(source, buffer):
if source.match(u"\\"):
buffer.append(u"\\")
return None
elif source.match(u"&"):
buffer.append(u"&")
return None
elif source.match(u"$"):
return PositionalArg(0)
n = parse_number(source)
return PositionalArg(n)
def parse_escape_sequence(source, buffer):
if source.match(u"\\"):
buffer.append(u"\\")
return None
elif source.match(u"&"):
buffer.append(u"&")
return None
elif source.match(u"$"):
return PositionalArg(0)
n = parse_number(source)
return PositionalArg(n)
def parse_insert_string(str):
source = regexp.Source(str)
buffer = rstring.UnicodeBuilder()
result = []
while not source.at_end():
if source.match(u"\\"):
escaped = parse_escape_sequence(source, buffer)
if escaped is not None:
if buffer.getlength():
result.append(StringLiteral(buffer.build()))
buffer = rstring.UnicodeBuilder()
result.append(escaped)
else:
ch = source.get()
buffer.append(ch)
if buffer.getlength():
result.append(StringLiteral(buffer.build()))
return result
def parse_insert_string(str):
source = regexp.Source(str)
buffer = rstring.UnicodeBuilder()
result = []
while not source.at_end():
if source.match(u"\\"):
escaped = parse_escape_sequence(source, buffer)
if escaped is not None:
if buffer.getlength():
result.append(StringLiteral(buffer.build()))
buffer = rstring.UnicodeBuilder()
result.append(escaped)
else:
ch = source.get()
buffer.append(ch)
if buffer.getlength():
result.append(StringLiteral(buffer.build()))
return result
