def _unlock_command(self):
"""
Matches based on the rule
# unlock -> UNLOCK "(" primary ")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after unlock .")
_key = self._primary()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after unlock.")
return grammar.Command(CommandType.UNLOCK_COMMAND, (_key, ))
def _subscribe_command(self):
"""
Matches based on the rule
# subscribe -> SUBSCRIBE "(" primary ")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after remove.")
_key = self._primary()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after remove.")
return grammar.Command(CommandType.SUBSCRIBE_COMMAND, (_key, ))
def _publish_command(self):
"""
Matches based on the rule
# publish -> PUBLISH "(" python_ref")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after remove.")
_value = self._primary()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after remove.")
return grammar.Command(CommandType.PUBLISH_COMMAND, (_value, ))
def _register_command(self):
"""
Matches based on the rule
# register -> REGISTER "(" primary ")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after remove.")
_key = self._primary()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after remove.")
return grammar.Command(CommandType.REGISTER_COMMAND, (_key, ))
def _read_command(self):
"""
Matches based on the rule
# read -> READ "(" primary ")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after read.")
_key = self._primary()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after read.")
return grammar.Command(CommandType.GET_COMMAND,
(_key, )) # have it in a tuble: immutable list
def _write_command(self):
"""
Matches based on the rule
# write -> WRITE "(" primary "," expression | python_ref")" ;
"""
self._consume(TokenType.LEFT_PAREN, "Except '(' after write.")
_key = self._primary()
self._consume(TokenType.COMMA, "Except ',' after command's key.")
if self._check(TokenType.AT):
_value = self._python_ref()
else:
_value = self._expression()
self._consume(TokenType.RIGHT_PAREN, "Except ')' after command's key.")
return grammar.Command(CommandType.PUT_COMMAND, (_key, _value))