Macro tryvial::try_block

macro_rules! try_block {
    { $($token:tt)* } => { ... };
}

Macro for the receiving end of a ? operation.

// Note: this fails without explicitly specifying the error type.
let y: Result<_, std::num::ParseIntError> = try_block! {
    "1".parse::<i32>()? + "2".parse::<i32>()?
};
assert_eq!(y, Ok(3));