示例#1
0
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
示例#2
0
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