16 lines
513 B
Text
16 lines
513 B
Text
import Lean
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-- This worked before issue #2361
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example {α : Type} {P : α → Prop} (a : α) (h : P a) : ∃ x, P x := by
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constructor
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assumption
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example {α : Type} {P : α → Prop} (a : α) (h : P a) : ∃ x, P x := by
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refine ⟨?m, ?c⟩
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-- `?m` is synthetic opaque, so `assumption` needs to be able to assign such metavariables
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-- for this to succeed.
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case c => assumption
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example {α : Type} {P : α → Prop} (a : α) (h : P a) : ∃ x, P x := by
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refine' ⟨_, ?c⟩
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case c => assumption
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