def _next(self) -> str:
if self._position >= len(self._input):
raise TranspilerError(self._source_position(),
"Reached EOL while parsing.")
result = self._peek()
self._position += 1
return result
def _read_until(self,
end_characters: List[str],
error_on_eol: bool = True):
result = []
while self._peek() not in end_characters:
if error_on_eol and self._peek() == "\n":
raise TranspilerError(self._source_position(),
"Reached EOL while parsing.")
result.append(self._next())
return "".join(result)
def _next(self) -> str:
if self._position >= len(self._input):
raise TranspilerError(self._source_position(),
"Reached EOF while parsing.")
result = self._peek()
if result == "\n":
self._line += 1
self._line_start = self._position + 1
self._position += 1
return result
def _parse_command(self, skip_whitespace_after_command=True):
pos = self._position
self._expect("$")
command = self._scan_alpha()
if command == "Nu" or command == "G" or command == "arg":
self._position = pos
self._parse_text()
return
if skip_whitespace_after_command:
self._skip_whitespace()
if command not in self._command_to_func:
raise TranspilerError(self._source_position(),
"Unknown command $" + command)
command = self._command_to_func[command]()
if isinstance(command, list):
self._commands.extend(command)
else:
self._commands.append(command)
def _scan_command(self) -> List[Command]:
self._next() # Consume the dollar sign.
three_char_command = self._peek() + self._safe_lookahead(
1) + self._safe_lookahead(2)
two_char_command = self._peek() + self._safe_lookahead(1)
one_char_command = self._peek()
if three_char_command in self._three_char_commands:
self._position += 3
return self._three_char_commands[three_char_command]()
elif two_char_command in self._two_char_commands:
self._position += 2
return self._two_char_commands[two_char_command]()
elif one_char_command in self._one_char_commands:
self._position += 1
return self._one_char_commands[one_char_command]()
else:
raise TranspilerError(
self._source_position(),
"Unrecognized command " + self._input[self._position:])
def _expect(self, expected_char: str):
next_char = self._next()
if next_char != expected_char:
raise TranspilerError(
self._source_position(),
"Expected %s found %s" % (expected_char, next_char))
def _convert_string_to_int(self, string: str):
try:
return int(string)
except:
raise TranspilerError(self._source_position(),
"Expected a number.")
def _scan_gender_dependent_message_command(self):
messages = self._scan_string().split(",")
if len(messages) < 2:
raise TranspilerError(self._source_position(),
"Invalid $G command.")
return [GenderDependentMessageCommand(messages[0], messages[1])]