Add retain function for BiBTreeMap

billyrieger / bimap-rs

Generic bijective maps in Rust

Apache License 2.0

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Add retain function for BiBTreeMap #30

Closed RaoulHC closed 3 years ago

RaoulHC commented 3 years ago

Pretty much identical to the retain function for BiHashMap.

Wondered whether there could be two functions that visit in ascending order over the left and right values respectively, but wasn't sure if that would ever be wanted.

billyrieger commented 3 years ago

Looks good, thank you!