"About a year ago, in Rust 1.13, we introduced the ? operator" And that includes...

		wscott on Nov 23, 2017 \| parent \| context \| favorite \| on: Announcing Rust 1.22 "About a year ago, in Rust 1.13, we introduced the ? operator" And that includes a link to the 1.13 announcement with a detailed explanation. https://blog.rust-lang.org/2016/11/10/Rust-1.13.html