Convert a String to int?

Note: this question contains deprecated pre-1.0 code! The answer is correct, though.

To convert a str to an int in Rust, I can do this:

let my_int = from_str::<int>(my_str);

The only way I know how to convert a String to an int is to get a slice of it and then use from_str on it like so:

let my_int = from_str::<int>(my_string.as_slice());

Is there a way to directly convert a String to an int?