b34379554d
When the elaborator doesn't provide us with any `CompletionInfo`, we currently provide no completions whatsoever. But in many cases, we can still provide some helpful identifier completions without elaborator information. This PR adds a fallback mode for this situation. There is more potential here, but this should be a good start. In principle, this issue alleviates #5172 (since we now provide completions in these contexts). I'll leave it up to an elaboration maintainer whether we also want to ensure that the completion infos are provided correctly in these cases.
31 lines
965 B
Text
31 lines
965 B
Text
-- When the elaborator doesn't provide `CompletionInfo`, try to provide identifier completions.
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-- As of when this test case was written, the elaborator did not provide `CompletionInfo` in these cases.
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-- https://github.com/leanprover/lean4/issues/5172
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inductive Direction where
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| up
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| right
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| down
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| left
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deriving Repr
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def angle (d: Direction) :=
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match d with
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| Direction. => 90
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--^ textDocument/completion
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| Direction.right => 0
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| Direction.down => 270
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| Direction.left => 180
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-- Ensure that test is stable when changes to the `And` namespace are made.
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structure CustomAnd (a b : Prop) : Prop where
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ha : a
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hb : b
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example : p ∨ (q ∧ r) → CustomAnd (p ∨ q) (p ∨ r) := by
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intro h
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cases h with
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| inl hp => apply CustomAnd. (Or.intro_left q hp) (Or.intro_left r hp)
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--^ textDocument/completion
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| inr hqr => apply CustomAnd.mk (Or.intro_right p hqr.left) (Or.intro_right p hqr.right)
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