alt Hacker NewsCan this just be done as a lambda that is immediately evaluated? It's just much more verbose.
let x = (|| -> Result<i32, std::num::ParseIntError> {
Ok("1".parse::<i32>()?
+ "2".parse::<i32>()?
+ "3".parse::<i32>()?)
})();Replies
schneems • yesterday at 5:56 AM
Wouldn't that also move any referenced variables too? Unlike the block example that would make this code not identical to what it's replacing.
➕ show 1 reply
saghm • yesterday at 3:27 AM
My instinct is this would get hairy much faster if you want to actually close over variables compared to using a block.
➕ show 2 replies
That prevents other control flow mechanisms (return, break) from operating past the function boundary. In general, I avoid single-callsite functions as much as possible (including the iterator api) for this reason.