rust just got 4x more productive [shill thread]

Rust designers developed an idiom for concisely propagating errors outwards with a macro called try!:
let file = try!(File::open("file.txt"));
More recently, Rust shipped an even more concise notation for error propagation, the postfix ? operator:
let file = File::open("file.txt")?;

>>18-26,28-43
If null pointers did not exist, it would be necessary to invent them.