this post was submitted on 01 Sep 2023
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5 Strong Opinions On Everyday Rust (www.youtube.com)
submitted 1 year ago by snaggen to c/rust
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[–] [email protected] 1 points 11 months ago

Such a case would be the single function having a side effect*. This allows the caller to chose when to execute the side effect or to drop the result without executing it.

In my opinion that is fine with fn_once but not into because of the implicit contract of these traits.

* = I'm counting expensive computation, but not allocation and memcopy as a side effect in this comment.