],
)
-FurAdditionExpression = collections.namedtuple(
- 'FurAdditionExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurSubtractionExpression = collections.namedtuple(
- 'FurSubtractionExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurMultiplicationExpression = collections.namedtuple(
- 'FurMultiplicationExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurIntegerDivisionExpression = collections.namedtuple(
- 'FurIntegerDivisionExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurModularDivisionExpression = collections.namedtuple(
- 'FurModularDivisionExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurEqualityExpression = collections.namedtuple(
- 'FurEqualityExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurInequalityExpression = collections.namedtuple(
- 'FurInequalityExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurLessThanOrEqualExpression = collections.namedtuple(
- 'FurLessThanOrEqualExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurGreaterThanOrEqualExpression = collections.namedtuple(
- 'FurGreaterThanOrEqualExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurLessThanExpression = collections.namedtuple(
- 'FurLessThanExpression',
- [
- 'left',
- 'right',
- ],
-)
-
-FurGreaterThanExpression = collections.namedtuple(
- 'FurGreaterThanExpression',
+FurInfixExpression = collections.namedtuple(
+ 'FurInfixExpression',
[
+ 'order',
+ 'operator',
'left',
'right',
],
_symbol_expression_parser,
)(index, tokens)
-def _left_recursive_infix_operator_parser(token_type, operand_parser, operator_to_expression_type_mapping):
+def _left_recursive_infix_operator_parser(operator_token_matcher, operand_parser, order):
def result_parser(index, tokens):
failure = (False, index, None)
if not success:
return failure
- while success and index < len(tokens) and tokens[index].type == token_type:
+ while success and index < len(tokens) and operator_token_matcher(tokens[index]):
success = False
if index + 1 < len(tokens):
success, try_index, value = operand_parser(index + 1, tokens)
if success:
- result = operator_to_expression_type_mapping[tokens[index].match](left=result, right=value)
+ result = FurInfixExpression(
+ order=order,
+ operator=tokens[index].match,
+ left=result,
+ right=value,
+ )
index = try_index
return True, index, result
def _multiplication_level_expression_parser(index, tokens):
return _left_recursive_infix_operator_parser(
- 'multiplication_level_operator',
+ lambda token: token.type == 'multiplication_level_operator',
_literal_level_expression_parser,
- {
- '*': FurMultiplicationExpression,
- '//': FurIntegerDivisionExpression,
- '%': FurModularDivisionExpression,
- },
+ 'multiplication_level',
)(index, tokens)
def _addition_level_expression_parser(index, tokens):
return _left_recursive_infix_operator_parser(
- 'addition_level_operator',
+ lambda token: token.type == 'addition_level_operator',
_multiplication_level_expression_parser,
- {
- '+': FurAdditionExpression,
- '-': FurSubtractionExpression,
- },
+ 'addition_level',
)(index, tokens)
def _equality_level_expression_parser(index, tokens):
return _left_recursive_infix_operator_parser(
- 'equality_level_operator',
+ lambda token: token.type == 'equality_level_operator',
_addition_level_expression_parser,
- {
- '==': FurEqualityExpression,
- '!=': FurInequalityExpression,
- '>=': FurGreaterThanOrEqualExpression,
- '<=': FurLessThanOrEqualExpression,
- '>': FurGreaterThanExpression,
- '<': FurLessThanExpression,
- },
+ 'equality_level',
+ )(index, tokens)
+
+def _and_level_expression_parser(index, tokens):
+ return _left_recursive_infix_operator_parser(
+ lambda token: token.type == 'symbol' and token.match == 'and',
+ _equality_level_expression_parser,
+ 'and_level',
+ )(index, tokens)
+
+def _or_level_expression_parser(index, tokens):
+ return _left_recursive_infix_operator_parser(
+ lambda token: token.type == 'symbol' and token.match == 'or',
+ _and_level_expression_parser,
+ 'or_level',
)(index, tokens)
def _comma_separated_list_parser(index, tokens):
return True, index, FurFunctionCallExpression(function=function, arguments=arguments)
-_expression_parser = _equality_level_expression_parser
+_expression_parser = _or_level_expression_parser
def _assignment_statement_parser(index, tokens):
# TODO Use a FurSymbolExpression for the target? Maybe this is actually not a good idea