8fc94c5c90
This PR fixes `split` in the presence of metavariables in the target. The fix consists of replacing an internal use of `apply` for instantiating match splitters by a new, simpler variant `applyN`. This new `applyN` is not prone to #8436, which is the ultimate cause for `split` failing on targets containing metavariables. --------- Co-authored-by: Sebastian Graf <sg@lean-fro.org> Co-authored-by: Joachim Breitner <mail@joachim-breitner.de>
15 lines
319 B
Text
15 lines
319 B
Text
/-!
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Tests that `split` works when there are metavariables in the target.
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-/
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theorem split_subgoals {x : Option Nat × Nat} :
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match x.fst with
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| some _ => True
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| none => True
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:= by
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have h {P : Prop} {x'} : (x' = 4 ∧ P) → P := by simp
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apply h
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split
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rotate_right
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· exact 4
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· trivial
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· trivial
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