Published on: 2025-07-03 21:31:55
A short note on two related rules of thumb. If there’s an if condition inside a function, consider if it could be moved to the caller instead: fn frobnicate (walrus: Walrus) { ... } fn frobnicate (walrus: Option <Walrus>) { let walrus = match walrus { Some (it) => it, None => return , }; ... } As in the example above, this often comes up with preconditions: a function might check precondition inside and “do nothing” if it doesn’t hold, or it could push the task of precondition checking to its
Keywords: bar fn foo function walrus
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