6e7b76c097
This PR adds a builtin tactic and a builtin attribute that are required for the tree map. The tactic, `as_aux_lemma`, can generally be used to wrap the proof term generated by a tactic sequence into a separate auxiliary lemma in order to keep the proof term small. This can, in rare cases, be necessary if the proof term will appear multiple times in the encompassing term. The new attribute, `Std.Internal.tree_tac`, is internal and should not be used outside of `Std`. --------- Co-authored-by: Paul Reichert <6992158+datokrat@users.noreply.github.com> |
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