Parsing functions with multiple arguments

I have managed to successfully implement functions with no arguments into my parser and they parser correctly, The way I have it so far also allows me to parse functions with a single argument. But I am not sure how to parse functions with multiple arguments. The code I have for this at the moment is the following:

```python
@self.pg.production('arg : type expr')
def typed_arg(p):
return [p[0], p[1]]

# Argument list for functions:
# function f(int x) {
# print(x);
# }

@self.pg.production('arg_list : arg COMMA arg_list')
def arg_list(p):
return [p[0]] + p[2]

@self.pg.production('arg_list : ')
def empty_args(p):
return []
```