def _read_float(self, reader):
start = reader.get_cursor()
result = ""
while reader.can_read():
char = reader.peek()
if char == ".":
reader.skip()
if reader.can_read() and reader.peek() == ".":
break
result += char
elif char.isdigit() or char == "+" or char == "-":
reader.skip()
result += char
else:
break
if not result:
raise BuiltInExceptions.reader_expected_float(
).create_with_context(reader)
# Verify result is a valid float
try:
return float(result)
except ValueError:
reader.set_cursor(start)
raise BuiltInExceptions.reader_invalid_float().create_with_context(
reader, result)
def read_float(self):
start = self.cursor
while self.can_read() and self.is_allowed_number(self.peek()):
self.skip()
number = self.string[start:self.cursor]
if not number:
raise BuiltInExceptions.reader_expected_float().create_with_context(self)
try:
return float(number)
except ValueError:
self.cursor = start
raise BuiltInExceptions.reader_invalid_float().create_with_context(self, number)