What is the point of an empty closure

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1

i see it used in stuff like thread spawn, also let statements etc, just an empty closure

2

Presumably a no-op[1] that satisfies a trait bound, e.g. the caller had to provide some FnMut() implementer, but didn't actually have anything they wanted done when the function called it.

  1. or placeholder for examples ↩ī¸Ž

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3

Sometimes it's also used to just drop a passed value, which reminds me of this.

4

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