Avoid unnecessary key.clone() when accessing HashMap.entry()

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Is it possible to access HashMap::entry() without cloning the key for every access? I know this is necessary for insertions but entry() forces you to always move the key just in case. This is a problem when using complex (immutable) values as key.

Here's a stripped down usage example: Rust Playground

Thank you.

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The new raw api would allow this, but the current api does not have a good way to solve this.

https://github.com/rust-lang/rust/pull/54043

https://github.com/rust-lang/rust/issues/56167

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Thanks a lot for the info!

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