def _parse_parameter(self):
""" Parses single parameter """
t = self._next_token()
while t.type == TokenType.NEWLINE or t.value == "\n":
if not self._tokens_left():
raise ParseError("Expected parameter at end of string")
t = self._next_token()
if t.type == TokenType.NAME:
# Constant or action used as parameter
if self._tokens_left() and self._peek_token(
).type == TokenType.OP and self._peek_token().value == '(':
# Action used as parameter
self.index -= 1 # go step back and reparse as action
parameter = self._parse_action()
elif self._tokens_left() and t.value in Action.ALL and type(
Action.ALL[
t.value]) == dict and self._peek_token().value == '.':
# SOMETHING.Action used as parameter
self.index -= 1 # go step back and reparse as action
parameter = self._parse_action()
else:
# Constant
if not t.value in ActionParser.CONSTS:
raise ParseError(
"Expected parameter, got '%s' which is not defined" %
(t.value, ))
parameter = ActionParser.CONSTS[t.value]
# Check for dots
while self._tokens_left() and self._peek_token(
).type == TokenType.OP and self._peek_token().value == '.':
self._next_token()
if not self._tokens_left():
raise ParseError("Expected NAME after '.'")
t = self._next_token()
if not hasattr(parameter, t.value):
raise ParseError("%s has no attribute '%s'" % (
parameter,
t.value,
))
parameter = getattr(parameter, t.value)
# Check for ranges (<, >, <=, >=)
if self._tokens_left() and self._peek_token().type == TokenType.OP:
if self._peek_token().value in RangeOP.OPS:
op = self._next_token().value
# TODO: Maybe other axes
if parameter not in (STICK, SCButtons.LT, SCButtons.RT,
SCButtons.X, SCButtons.Y):
raise ParseError("'%s' is not trigger nor axis" %
(nameof(parameter), ))
if not self._tokens_left():
raise ParseError("Excepted number after '%s'" % (op, ))
try:
number = float(self._next_token().value)
except ValueError:
raise ParseError("Excepted number after '%s'" % (op, ))
parameter = RangeOP(parameter, op, number)
return parameter
if t.type == TokenType.OP and t.value == "-":
if not self._tokens_left(
) or self._peek_token().type != TokenType.NUMBER:
raise ParseError("Expected number after '-'")
return -self._parse_number()
if t.type == TokenType.NUMBER:
self.index -= 1
return self._parse_number()
if t.type == TokenType.STRING:
return t.value[1:-1].decode('string_escape')
raise ParseError("Expected parameter, got '%s'" % (t.value, ))