058e63a3d6
This PR provides lemmas about the tree map functions `foldlM`, `foldl`, `foldrM` and `foldr` and their interactions with other functions for which lemmas already exist. Additionally, it generalizes the `fold*`/`keys` lemmas to arbitrary tree maps, which were previously stated only for the `DTreeMap α Unit` case. A later PR will make the hash map functions `fold` and `revFold` internal and also update their signature to conform to the tree map and list API. This is out of scope for this PR. --------- Co-authored-by: Paul Reichert <6992158+datokrat@users.noreply.github.com> |
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