try_blocks

The tracking issue for this feature is: #31436


The try_blocks feature adds support for try blocks. A try block creates a new scope one can use the ? operator in.

#![allow(unused)] #![feature(try_blocks)] fn main() { use std::num::ParseIntError; let result: Result<i32, ParseIntError> = try { "1".parse::<i32>()? + "2".parse::<i32>()? + "3".parse::<i32>()? }; assert_eq!(result, Ok(6)); let result: Result<i32, ParseIntError> = try { "1".parse::<i32>()? + "foo".parse::<i32>()? + "3".parse::<i32>()? }; assert!(result.is_err()); }