Rust week of 2015-05-29


I was surprised by the somewhat magical Rust type inference:

fn main() {
	let string = "10";
	let num = match string.parse() {
		Ok(num) => num,
		Err(_) => 0,
	assert_eq!(num, 10);

A more explicit parse call would be string.parse::<i32>(), but the type to be parsed into is inferred by the 0 that is returned in the Err(_) arm of the match, which is an i32. This is some far-reaching shit!