def handle_while(block, instance_vars, stack):
validate_while_loop_syntax(block)
tokens = clean_up_list_elems(flatten_list(re.split("while\s*\(", block)))
tokens = clean_up_list_elems(flatten_list(list(map(lambda x: re.split("\)\s*\{", x), tokens))))
tokens = clean_up_list_elems(flatten_list(list(map(lambda x: re.split("\}", x), tokens))))
print("tokens: " + str(tokens))
assert len(tokens) == 2, "There should be 2 tokens, but there are " + str(len(tokens))
condition, statements = tokens[0], tokens[1]
while evaluate_expression(condition):
parse_eval(statements, instance_vars, stack) # We will NOT support different scoping for variables inside.
return # Call parse_eval with instance_vars
def handle_for(block, instance_vars, stack):
validate_for_loop_syntax(block)
tokens = clean_up_list_elems(flatten_list(re.split("for\s*\(", block)))
tokens = clean_up_list_elems(flatten_list(list(map(lambda x: re.split("\)\s*\{", x), tokens))))
tokens = clean_up_list_elems(flatten_list(list(map(lambda x: re.split("\}", x), tokens))))
print("tokens: " + str(tokens))
tokens = tokens[0].split(";") + [tokens[1]]
print("tokens: " + str(tokens))
initialize, condition, update, statements = tokens
print("tokens: " + str(tokens))
assign_variable(initialize, instance_vars, stack)
evaluated_condition = evaluate_expression(condition)
if type(evaluated_condition) is not bool:
raise InvalidForLoopException("Boolean condition is of wrong type")
while evaluated_condition:
parse_eval(statements, instance_vars, stack)
assign_variable(update, instance_vars, stack)
return
