add function for explicitly extending an hlist

lloydmeta / frunk

Funktional generic type-level programming in Rust: HList, Coproduct, Generic, LabelledGeneric, Validated, Monoid and friends.

https://beachape.com/frunk/

MIT License

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Closed CobaltCause closed 1 year ago

CobaltCause commented 1 year ago

This is basically std::iter::Extend but for HLists.