cb0284f98e
This PR implements signature help support. When typing a function application, editors with support for signature help will now display a popup that designates the current (remaining) function type. This removes the need to remember the function signature while typing the function application, or having to constantly cycle between hovering over the function identifier and typing the application. In VS Code, the signature help can be triggered manually using `Ctrl+Shift+Space`.  ### Other changes - In order to support signature help for the partial syntax `f a <|` or `f a $`, these notations now elaborate as `f a`, not `f a .missing`. - The logic in `delabConstWithSignature` that delaborates parameters is factored out into a function `delabForallParamsWithSignature` so that it can be used for arbitrary `forall`s, not just constants. - The `InfoTree` formatter is adjusted to produce output where it is easier to identify the kind of `Info` in the `InfoTree`. - A bug in `InfoTree.smallestInfo?` is fixed so that it doesn't panic anymore when its predicate `p` does not ensure that both `pos?` and `tailPos?` of the `Info` are present.
83 lines
4.2 KiB
Text
83 lines
4.2 KiB
Text
-- This tests the `#info_trees in` command.
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-- If it proves too fragile to test the result using `#guard_msgs`,
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-- it is fine to simply remove the `#guard_msgs` and expected output.
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/--
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info: • [Command] @ ⟨83, 0⟩-⟨83, 40⟩ @ Lean.Elab.Command.elabDeclaration
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• [Term] Nat : Type @ ⟨83, 15⟩-⟨83, 18⟩ @ Lean.Elab.Term.elabIdent
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• [Completion-Id] Nat : some Sort.{?_uniq.1} @ ⟨83, 15⟩-⟨83, 18⟩
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• [Term] Nat : Type @ ⟨83, 15⟩-⟨83, 18⟩
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• [Term] n (isBinder := true) : Nat @ ⟨83, 11⟩-⟨83, 12⟩
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• [Term] 0 ≤ n : Prop @ ⟨83, 22⟩-⟨83, 27⟩ @ «_aux_Init_Notation___macroRules_term_≤__2»
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• [MacroExpansion]
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0 ≤ n
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===>
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binrel% LE.le✝ 0 n
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• [Term] 0 ≤ n : Prop @ ⟨83, 22⟩†-⟨83, 27⟩† @ Lean.Elab.Term.Op.elabBinRel
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• [Term] 0 ≤ n : Prop @ ⟨83, 22⟩†-⟨83, 27⟩†
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• [Completion-Id] LE.le✝ : none @ ⟨83, 22⟩†-⟨83, 27⟩†
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• [Term] 0 : Nat @ ⟨83, 22⟩-⟨83, 23⟩ @ Lean.Elab.Term.elabNumLit
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• [Term] n : Nat @ ⟨83, 26⟩-⟨83, 27⟩ @ Lean.Elab.Term.elabIdent
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• [Completion-Id] n : none @ ⟨83, 26⟩-⟨83, 27⟩
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• [Term] n : Nat @ ⟨83, 26⟩-⟨83, 27⟩
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• [CustomInfo(Lean.Elab.Term.AsyncBodyInfo)]
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• [Term] t (isBinder := true) : ∀ (n : Nat), 0 ≤ n @ ⟨83, 8⟩-⟨83, 9⟩
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• [Term] n (isBinder := true) : Nat @ ⟨83, 11⟩-⟨83, 12⟩
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• [CustomInfo(Lean.Elab.Term.BodyInfo)]
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• [Tactic] @ ⟨83, 31⟩-⟨83, 40⟩
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(Term.byTactic "by" (Tactic.tacticSeq (Tactic.tacticSeq1Indented [(Tactic.exact? "exact?" [])])))
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Tactic] @ ⟨83, 31⟩-⟨83, 33⟩
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"by"
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Tactic] @ ⟨83, 34⟩-⟨83, 40⟩ @ Lean.Elab.Tactic.evalTacticSeq
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(Tactic.tacticSeq (Tactic.tacticSeq1Indented [(Tactic.exact? "exact?" [])]))
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Tactic] @ ⟨83, 34⟩-⟨83, 40⟩ @ Lean.Elab.Tactic.evalTacticSeq1Indented
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(Tactic.tacticSeq1Indented [(Tactic.exact? "exact?" [])])
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Tactic] @ ⟨83, 34⟩-⟨83, 40⟩ @ Lean.Elab.LibrarySearch.evalExact
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(Tactic.exact? "exact?" [])
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Tactic] @ ⟨83, 34⟩†-⟨83, 40⟩† @ Lean.Elab.Tactic.evalExact
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(Tactic.exact "exact" (Term.app `Nat.zero_le [`n]))
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before ⏎
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n : Nat
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⊢ 0 ≤ n
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after no goals
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• [Term] Nat.zero_le n : 0 ≤ n @ ⟨1, 1⟩†-⟨1, 1⟩† @ Lean.Elab.Term.elabApp
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• [Completion-Id] Nat.zero_le : some LE.le.{0} Nat instLENat (OfNat.ofNat.{0} Nat 0 (instOfNatNat 0)) _uniq.42 @ ⟨1, 0⟩†-⟨1, 0⟩†
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• [Term] Nat.zero_le : ∀ (n : Nat), 0 ≤ n @ ⟨1, 0⟩†-⟨1, 0⟩†
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• [Term] n : Nat @ ⟨1, 5⟩†-⟨1, 5⟩† @ Lean.Elab.Term.elabIdent
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• [Completion-Id] n : some Nat @ ⟨1, 5⟩†-⟨1, 5⟩†
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• [Term] n : Nat @ ⟨1, 5⟩†-⟨1, 5⟩†
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• [CustomInfo(Lean.Meta.Tactic.TryThis.TryThisInfo)]
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• [UserWidget] Lean.Meta.Tactic.TryThis.tryThisWidget
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{"suggestions": [{"suggestion": "exact Nat.zero_le n"}],
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"style": null,
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"range":
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{"start": {"line": 82, "character": 34}, "end": {"line": 82, "character": 40}},
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"isInline": true,
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"header": "Try this: "}
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• [Term] t (isBinder := true) : ∀ (n : Nat), 0 ≤ n @ ⟨83, 8⟩-⟨83, 9⟩
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---
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info: Try this: exact Nat.zero_le n
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-/
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#guard_msgs in
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#info_trees in
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theorem t (n : Nat) : 0 ≤ n := by exact?
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