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Yep, and one cannot simulate that with local variables. In Go "return v" copies v into the return location before calling the deferred code. If that location is
by fpoling 9y ago
Yep, and one cannot simulate that with local variables. In Go "return v" copies v into the return location before calling the deferred code. If that location is not named, the deferred function has no way to change it, see https://play.golang.org/p/Opg4XI08P7 https://play.golang.org/p/Opg4XI08P7
- 19eightyfour 9y agoI got it. That's a neat example. Do you have to define that deferred function inside the caller, in order to reference the name? Or can you factor out deferred functions to be used by various callers and pass in the return names for them to modify?
- fpoling 9y agoYou can pass a pointer to the named return values to a function defined outside, like in https://play.golang.org/p/5jBKcUCj8C https://play.golang.org/p/5jBKcUCj8C .