From 2a02c121cfcb586fe64cfdf3a6b2a88d68c861e7 Mon Sep 17 00:00:00 2001
From: Marc Huisinga <mhuisi@protonmail.com>
Date: Tue, 22 Oct 2024 18:10:57 +0200
Subject: [PATCH] feat: structure auto-completion & partial `InfoTree`s

---
 src/Init/Meta.lean                            |  28 +
 src/Init/Prelude.lean                         |  25 +-
 src/Lean/Data/Lsp/Basic.lean                  |   3 +-
 src/Lean/Data/Lsp/LanguageFeatures.lean       |   8 +-
 src/Lean/Elab/App.lean                        |  16 +-
 src/Lean/Elab/BuiltinTerm.lean                |  13 +-
 src/Lean/Elab/Extra.lean                      |  28 +-
 src/Lean/Elab/InfoTree/Main.lean              |  59 +-
 src/Lean/Elab/InfoTree/Types.lean             |  23 +-
 src/Lean/Elab/LetRec.lean                     |   9 +-
 src/Lean/Elab/Match.lean                      |   2 +-
 src/Lean/Elab/MutualDef.lean                  |  44 +-
 src/Lean/Elab/Term.lean                       |  60 +-
 src/Lean/Linter/UnusedVariables.lean          |  21 +-
 src/Lean/Server/Completion.lean               | 605 ++++++++++++-----
 .../Server/FileWorker/RequestHandling.lean    |  13 +-
 src/Lean/Server/InfoUtils.lean                |   2 +
 .../1018unknowMVarIssue.lean.expected.out     |   1 +
 tests/lean/instance1.lean.expected.out        |   2 +-
 tests/lean/interactive/1265.lean.expected.out |  60 +-
 tests/lean/interactive/1659.lean.expected.out |  39 +-
 tests/lean/interactive/4880.lean.expected.out |  12 +-
 tests/lean/interactive/533.lean.expected.out  |   6 +-
 tests/lean/interactive/863.lean.expected.out  |  12 +-
 .../interactive/compHeader.lean.expected.out  |   6 +-
 .../compNamespace.lean.expected.out           |  15 +-
 .../interactive/completion.lean.expected.out  |  12 +-
 .../interactive/completion2.lean.expected.out |  45 +-
 .../interactive/completion3.lean.expected.out |  36 +-
 .../interactive/completion4.lean.expected.out |  36 +-
 .../interactive/completion5.lean.expected.out |   9 +-
 .../interactive/completion6.lean.expected.out |  33 +-
 .../interactive/completion7.lean.expected.out |  12 +-
 .../completionAtPrint.lean.expected.out       |   6 +-
 .../completionCheck.lean.expected.out         |   6 +-
 .../completionDeprecation.lean.expected.out   |  24 +-
 .../completionDocString.lean.expected.out     |   6 +-
 .../completionEOF.lean.expected.out           |   3 +-
 .../completionFallback.lean.expected.out      |  27 +-
 ...mpletionFromExpectedType.lean.expected.out |   3 +-
 .../completionIStr.lean.expected.out          |   9 +-
 ...completionOpenNamespaces.lean.expected.out |   4 +-
 .../completionOption.lean.expected.out        |  93 ++-
 .../completionPrefixIssue.lean.expected.out   |   6 +-
 .../completionPrivateTypes.lean.expected.out  |   3 +-
 .../completionPrv.lean.expected.out           |  42 +-
 .../completionStructureInstance.lean          |  96 +++
 ...pletionStructureInstance.lean.expected.out | 612 ++++++++++++++++++
 .../completionTactics.lean.expected.out       | 408 ++++++++----
 .../dotIdCompletion.lean.expected.out         |   6 +-
 .../editCompletion.lean.expected.out          |   3 +-
 .../inWordCompletion.lean.expected.out        |  18 +-
 .../internalNamesIssue.lean.expected.out      |   6 +-
 .../keywordCompletion.lean.expected.out       |  21 +-
 .../lean/interactive/match.lean.expected.out  |  18 +-
 .../matchStxCompletion.lean.expected.out      |   9 +-
 .../travellingCompletions.lean.expected.out   |  18 +-
 57 files changed, 2117 insertions(+), 625 deletions(-)
 create mode 100644 tests/lean/interactive/completionStructureInstance.lean
 create mode 100644 tests/lean/interactive/completionStructureInstance.lean.expected.out

diff --git a/src/Init/Meta.lean b/src/Init/Meta.lean
index 146b068820..4b25a919e8 100644
--- a/src/Init/Meta.lean
+++ b/src/Init/Meta.lean
@@ -374,6 +374,9 @@ partial def structEq : Syntax → Syntax → Bool
 instance : BEq Lean.Syntax := ⟨structEq⟩
 instance : BEq (Lean.TSyntax k) := ⟨(·.raw == ·.raw)⟩
 
+/--
+Finds the first `SourceInfo` from the back of `stx` or `none` if no `SourceInfo` can be found.
+-/
 partial def getTailInfo? : Syntax → Option SourceInfo
   | atom info _   => info
   | ident info .. => info
@@ -382,14 +385,39 @@ partial def getTailInfo? : Syntax → Option SourceInfo
   | node info _ _    => info
   | _             => none
 
+/--
+Finds the first `SourceInfo` from the back of `stx` or `SourceInfo.none`
+if no `SourceInfo` can be found.
+-/
 def getTailInfo (stx : Syntax) : SourceInfo :=
   stx.getTailInfo?.getD SourceInfo.none
 
+/--
+Finds the trailing size of the first `SourceInfo` from the back of `stx`.
+If no `SourceInfo` can be found or the first `SourceInfo` from the back of `stx` contains no
+trailing whitespace, the result is `0`.
+-/
 def getTrailingSize (stx : Syntax) : Nat :=
   match stx.getTailInfo? with
   | some (SourceInfo.original (trailing := trailing) ..) => trailing.bsize
   | _ => 0
 
+/--
+Finds the trailing whitespace substring of the first `SourceInfo` from the back of `stx`.
+If no `SourceInfo` can be found or the first `SourceInfo` from the back of `stx` contains
+no trailing whitespace, the result is `none`.
+-/
+def getTrailing? (stx : Syntax) : Option Substring :=
+  stx.getTailInfo.getTrailing?
+
+/--
+Finds the tail position of the trailing whitespace of the first `SourceInfo` from the back of `stx`.
+If no `SourceInfo` can be found or the first `SourceInfo` from the back of `stx` contains
+no trailing whitespace and lacks a tail position, the result is `none`.
+-/
+def getTrailingTailPos? (stx : Syntax) (canonicalOnly := false) : Option String.Pos :=
+  stx.getTailInfo.getTrailingTailPos? canonicalOnly
+
 /--
   Return substring of original input covering `stx`.
   Result is meaningful only if all involved `SourceInfo.original`s refer to the same string (as is the case after parsing). -/
diff --git a/src/Init/Prelude.lean b/src/Init/Prelude.lean
index 39618b16d1..35fd5c7ca4 100644
--- a/src/Init/Prelude.lean
+++ b/src/Init/Prelude.lean
@@ -3654,7 +3654,8 @@ namespace SourceInfo
 
 /--
 Gets the position information from a `SourceInfo`, if available.
-If `originalOnly` is true, then `.synthetic` syntax will also return `none`.
+If `canonicalOnly` is true, then `.synthetic` syntax with `canonical := false`
+will also return `none`.
 -/
 def getPos? (info : SourceInfo) (canonicalOnly := false) : Option String.Pos :=
   match info, canonicalOnly with
@@ -3665,7 +3666,8 @@ def getPos? (info : SourceInfo) (canonicalOnly := false) : Option String.Pos :=
 
 /--
 Gets the end position information from a `SourceInfo`, if available.
-If `originalOnly` is true, then `.synthetic` syntax will also return `none`.
+If `canonicalOnly` is true, then `.synthetic` syntax with `canonical := false`
+will also return `none`.
 -/
 def getTailPos? (info : SourceInfo) (canonicalOnly := false) : Option String.Pos :=
   match info, canonicalOnly with
@@ -3674,6 +3676,24 @@ def getTailPos? (info : SourceInfo) (canonicalOnly := false) : Option String.Pos
   | synthetic (endPos := endPos) .., false => some endPos
   | _,                               _     => none
 
+/--
+Gets the substring representing the trailing whitespace of a `SourceInfo`, if available.
+-/
+def getTrailing? (info : SourceInfo) : Option Substring :=
+  match info with
+  | original (trailing := trailing) .. => some trailing
+  | _                                  => none
+
+/--
+Gets the end position information of the trailing whitespace of a `SourceInfo`, if available.
+If `canonicalOnly` is true, then `.synthetic` syntax with `canonical := false`
+will also return `none`.
+-/
+def getTrailingTailPos? (info : SourceInfo) (canonicalOnly := false) : Option String.Pos :=
+  match info.getTrailing? with
+  | some trailing => some trailing.stopPos
+  | none          => info.getTailPos? canonicalOnly
+
 end SourceInfo
 
 /--
@@ -3972,7 +3992,6 @@ position information.
 def getPos? (stx : Syntax) (canonicalOnly := false) : Option String.Pos :=
   stx.getHeadInfo.getPos? canonicalOnly
 
-
 /--
 Get the ending position of the syntax, if possible.
 If `canonicalOnly` is true, non-canonical `synthetic` nodes are treated as not carrying
diff --git a/src/Lean/Data/Lsp/Basic.lean b/src/Lean/Data/Lsp/Basic.lean
index 2403101173..55fb5dd8ab 100644
--- a/src/Lean/Data/Lsp/Basic.lean
+++ b/src/Lean/Data/Lsp/Basic.lean
@@ -365,6 +365,7 @@ structure TextDocumentRegistrationOptions where
 
 inductive MarkupKind where
   | plaintext | markdown
+  deriving DecidableEq, Hashable
 
 instance : FromJson MarkupKind := ⟨fun
   | str "plaintext" => Except.ok MarkupKind.plaintext
@@ -378,7 +379,7 @@ instance : ToJson MarkupKind := ⟨fun
 structure MarkupContent where
   kind  : MarkupKind
   value : String
-  deriving ToJson, FromJson
+  deriving ToJson, FromJson, DecidableEq, Hashable
 
 /-- Reference to the progress of some in-flight piece of work.
 
diff --git a/src/Lean/Data/Lsp/LanguageFeatures.lean b/src/Lean/Data/Lsp/LanguageFeatures.lean
index f5c46a13d6..038d200e4d 100644
--- a/src/Lean/Data/Lsp/LanguageFeatures.lean
+++ b/src/Lean/Data/Lsp/LanguageFeatures.lean
@@ -25,7 +25,7 @@ inductive CompletionItemKind where
   | unit | value | enum | keyword | snippet
   | color | file | reference | folder | enumMember
   | constant | struct | event | operator | typeParameter
-  deriving Inhabited, DecidableEq, Repr
+  deriving Inhabited, DecidableEq, Repr, Hashable
 
 instance : ToJson CompletionItemKind where
   toJson a := toJson (a.toCtorIdx + 1)
@@ -39,11 +39,11 @@ structure InsertReplaceEdit where
   newText : String
   insert  : Range
   replace : Range
-  deriving FromJson, ToJson
+  deriving FromJson, ToJson, BEq, Hashable
 
 inductive CompletionItemTag where
   | deprecated
-  deriving Inhabited, DecidableEq, Repr
+  deriving Inhabited, DecidableEq, Repr, Hashable
 
 instance : ToJson CompletionItemTag where
   toJson t := toJson (t.toCtorIdx + 1)
@@ -73,7 +73,7 @@ structure CompletionItem where
   commitCharacters? : string[]
   command? : Command
   -/
-  deriving FromJson, ToJson, Inhabited
+  deriving FromJson, ToJson, Inhabited, BEq, Hashable
 
 structure CompletionList where
   isIncomplete : Bool
diff --git a/src/Lean/Elab/App.lean b/src/Lean/Elab/App.lean
index e68ba7362b..cde308ac04 100644
--- a/src/Lean/Elab/App.lean
+++ b/src/Lean/Elab/App.lean
@@ -1399,8 +1399,8 @@ private def elabAppLValsAux (namedArgs : Array NamedArg) (args : Array Arg) (exp
   let rec loop : Expr → List LVal → TermElabM Expr
   | f, []          => elabAppArgs f namedArgs args expectedType? explicit ellipsis
   | f, lval::lvals => do
-    if let LVal.fieldName (fullRef := fullRef) .. := lval then
-      addDotCompletionInfo fullRef f expectedType?
+    if let LVal.fieldName (ref := ref) .. := lval then
+      addDotCompletionInfo ref f expectedType?
     let hasArgs := !namedArgs.isEmpty || !args.isEmpty
     let (f, lvalRes) ← resolveLVal f lval hasArgs
     match lvalRes with
@@ -1648,8 +1648,16 @@ private def getSuccesses (candidates : Array (TermElabResult Expr)) : TermElabM
   Throw an error message that describes why each possible interpretation for the overloaded notation and symbols did not work.
   We use a nested error message to aggregate the exceptions produced by each failure.
 -/
-private def mergeFailures (failures : Array (TermElabResult Expr)) : TermElabM α := do
+private def mergeFailures (f : Syntax) (failures : Array (TermElabResult Expr)) : TermElabM α := do
   let exs := failures.map fun | .error ex _ => ex | _ => unreachable!
+  let trees := failures.map (fun | .error _ s => s.meta.core.infoState.trees | _ => unreachable!)
+    |>.filterMap (·[0]?)
+  -- Retain partial `InfoTree` subtrees in an `.ofChoiceInfo` node in case of multiple failures.
+  -- This ensures that the language server still has `Info` to work with when multiple overloaded
+  -- elaborators fail.
+  withInfoContext (mkInfo := pure <| .ofChoiceInfo { elaborator := .anonymous, stx := f}) do
+    for tree in trees do
+      pushInfoTree tree
   throwErrorWithNestedErrors "overloaded" exs
 
 private def elabAppAux (f : Syntax) (namedArgs : Array NamedArg) (args : Array Arg) (ellipsis : Bool) (expectedType? : Option Expr) : TermElabM Expr := do
@@ -1669,7 +1677,7 @@ private def elabAppAux (f : Syntax) (namedArgs : Array NamedArg) (args : Array A
         | _       => unreachable!
       throwErrorAt f "ambiguous, possible interpretations {toMessageList msgs}"
     else
-      withRef f <| mergeFailures candidates
+      withRef f <| mergeFailures f candidates
 
 /--
   We annotate recursive applications with their `Syntax` node to make sure we can produce error messages with
diff --git a/src/Lean/Elab/BuiltinTerm.lean b/src/Lean/Elab/BuiltinTerm.lean
index f9a225b9b6..3fd9fbae3a 100644
--- a/src/Lean/Elab/BuiltinTerm.lean
+++ b/src/Lean/Elab/BuiltinTerm.lean
@@ -42,16 +42,15 @@ private def elabOptLevel (stx : Syntax) : TermElabM Level :=
 @[builtin_term_elab «completion»] def elabCompletion : TermElab := fun stx expectedType? => do
   /- `ident.` is ambiguous in Lean, we may try to be completing a declaration name or access a "field". -/
   if stx[0].isIdent then
-    /- If we can elaborate the identifier successfully, we assume it is a dot-completion. Otherwise, we treat it as
-       identifier completion with a dangling `.`.
-       Recall that the server falls back to identifier completion when dot-completion fails. -/
+    -- Add both an `id` and a `dot` `CompletionInfo` and have the language server figure out which
+    -- one to use.
+    addCompletionInfo <| CompletionInfo.id stx stx[0].getId (danglingDot := true) (← getLCtx) expectedType?
     let s ← saveState
     try
       let e ← elabTerm stx[0] none
       addDotCompletionInfo stx e expectedType?
     catch _ =>
       s.restore
-      addCompletionInfo <| CompletionInfo.id stx stx[0].getId (danglingDot := true) (← getLCtx) expectedType?
     throwErrorAt stx[1] "invalid field notation, identifier or numeral expected"
   else
     elabPipeCompletion stx expectedType?
@@ -328,7 +327,11 @@ private def mkSilentAnnotationIfHole (e : Expr) : TermElabM Expr := do
 @[builtin_term_elab withAnnotateTerm] def elabWithAnnotateTerm : TermElab := fun stx expectedType? => do
   match stx with
   | `(with_annotate_term $stx $e) =>
-    withInfoContext' stx (elabTerm e expectedType?) (mkTermInfo .anonymous (expectedType? := expectedType?) stx)
+    withInfoContext'
+      stx
+      (elabTerm e expectedType?)
+      (mkTermInfo .anonymous (expectedType? := expectedType?) stx)
+      (mkPartialTermInfo .anonymous (expectedType? := expectedType?) stx)
   | _ => throwUnsupportedSyntax
 
 private unsafe def evalFilePathUnsafe (stx : Syntax) : TermElabM System.FilePath :=
diff --git a/src/Lean/Elab/Extra.lean b/src/Lean/Elab/Extra.lean
index 38372ebae9..2000936cb3 100644
--- a/src/Lean/Elab/Extra.lean
+++ b/src/Lean/Elab/Extra.lean
@@ -327,15 +327,29 @@ private def toExprCore (t : Tree) : TermElabM Expr := do
   | .term _ trees e =>
     modifyInfoState (fun s => { s with trees := s.trees ++ trees }); return e
   | .binop ref kind f lhs rhs =>
-    withRef ref <| withInfoContext' ref (mkInfo := mkTermInfo .anonymous ref) do
-      mkBinOp (kind == .lazy) f (← toExprCore lhs) (← toExprCore rhs)
+    withRef ref <|
+      withInfoContext'
+        ref
+        (mkInfo := mkTermInfo .anonymous ref)
+        (mkInfoOnError := mkPartialTermInfo .anonymous ref)
+        do
+          mkBinOp (kind == .lazy) f (← toExprCore lhs) (← toExprCore rhs)
   | .unop ref f arg =>
-    withRef ref <| withInfoContext' ref (mkInfo := mkTermInfo .anonymous ref) do
-      mkUnOp f (← toExprCore arg)
+    withRef ref <|
+      withInfoContext'
+        ref
+        (mkInfo := mkTermInfo .anonymous ref)
+        (mkInfoOnError := mkPartialTermInfo .anonymous ref)
+        do
+          mkUnOp f (← toExprCore arg)
   | .macroExpansion macroName stx stx' nested =>
-    withRef stx <| withInfoContext' stx (mkInfo := mkTermInfo macroName stx) do
-      withMacroExpansion stx stx' do
-        toExprCore nested
+    withRef stx <|
+      withInfoContext'
+        stx
+        (mkInfo := mkTermInfo macroName stx)
+        (mkInfoOnError := mkPartialTermInfo macroName stx) <|
+          withMacroExpansion stx stx' <|
+            toExprCore nested
 
 /--
   Auxiliary function to decide whether we should coerce `f`'s argument to `maxType` or not.
diff --git a/src/Lean/Elab/InfoTree/Main.lean b/src/Lean/Elab/InfoTree/Main.lean
index 5ba988886f..eb129079d4 100644
--- a/src/Lean/Elab/InfoTree/Main.lean
+++ b/src/Lean/Elab/InfoTree/Main.lean
@@ -139,12 +139,16 @@ def TermInfo.runMetaM (info : TermInfo) (ctx : ContextInfo) (x : MetaM α) : IO
 
 def TermInfo.format (ctx : ContextInfo) (info : TermInfo) : IO Format := do
   info.runMetaM ctx do
-    let ty : Format ← try
-      Meta.ppExpr (← Meta.inferType info.expr)
-    catch _ =>
-      pure "<failed-to-infer-type>"
+    let ty : Format ←
+      try
+        Meta.ppExpr (← Meta.inferType info.expr)
+      catch _ =>
+        pure "<failed-to-infer-type>"
     return f!"{← Meta.ppExpr info.expr} {if info.isBinder then "(isBinder := true) " else ""}: {ty} @ {formatElabInfo ctx info.toElabInfo}"
 
+def PartialTermInfo.format (ctx : ContextInfo) (info : PartialTermInfo) : Format :=
+  f!"Partial term @ {formatElabInfo ctx info.toElabInfo}"
+
 def CompletionInfo.format (ctx : ContextInfo) (info : CompletionInfo) : IO Format :=
   match info with
   | .dot i (expectedType? := expectedType?) .. => return f!"[.] {← i.format ctx} : {expectedType?}"
@@ -191,9 +195,13 @@ def FieldRedeclInfo.format (ctx : ContextInfo) (info : FieldRedeclInfo) : Format
 def OmissionInfo.format (ctx : ContextInfo) (info : OmissionInfo) : IO Format := do
   return f!"Omission @ {← TermInfo.format ctx info.toTermInfo}\nReason: {info.reason}"
 
+def ChoiceInfo.format (ctx : ContextInfo) (info : ChoiceInfo) : Format :=
+  f!"Choice @ {formatElabInfo ctx info.toElabInfo}"
+
 def Info.format (ctx : ContextInfo) : Info → IO Format
   | ofTacticInfo i         => i.format ctx
   | ofTermInfo i           => i.format ctx
+  | ofPartialTermInfo i    => pure <| i.format ctx
   | ofCommandInfo i        => i.format ctx
   | ofMacroExpansionInfo i => i.format ctx
   | ofOptionInfo i         => i.format ctx
@@ -204,10 +212,12 @@ def Info.format (ctx : ContextInfo) : Info → IO Format
   | ofFVarAliasInfo i      => pure <| i.format
   | ofFieldRedeclInfo i    => pure <| i.format ctx
   | ofOmissionInfo i       => i.format ctx
+  | ofChoiceInfo i         => pure <| i.format ctx
 
 def Info.toElabInfo? : Info → Option ElabInfo
   | ofTacticInfo i         => some i.toElabInfo
   | ofTermInfo i           => some i.toElabInfo
+  | ofPartialTermInfo i    => some i.toElabInfo
   | ofCommandInfo i        => some i.toElabInfo
   | ofMacroExpansionInfo _ => none
   | ofOptionInfo _         => none
@@ -218,6 +228,7 @@ def Info.toElabInfo? : Info → Option ElabInfo
   | ofFVarAliasInfo _      => none
   | ofFieldRedeclInfo _    => none
   | ofOmissionInfo i       => some i.toElabInfo
+  | ofChoiceInfo i         => some i.toElabInfo
 
 /--
   Helper function for propagating the tactic metavariable context to its children nodes.
@@ -311,24 +322,36 @@ def realizeGlobalNameWithInfos (ref : Syntax) (id : Name) : CoreM (List (Name ×
       addConstInfo ref n
   return ns
 
-/-- Use this to descend a node on the infotree that is being built.
+/--
+Adds a node containing the `InfoTree`s generated by `x` to the `InfoTree`s in `m`.
 
-It saves the current list of trees `t₀` and resets it and then runs `x >>= mkInfo`, producing either an `i : Info` or a hole id.
-Running `x >>= mkInfo` will modify the trees state and produce a new list of trees `t₁`.
-In the `i : Info` case, `t₁` become the children of a node `node i t₁` that is appended to `t₀`.
- -/
-def withInfoContext' [MonadFinally m] (x : m α) (mkInfo : α → m (Sum Info MVarId)) : m α := do
+If `x` succeeds and `mkInfo` yields an `Info`, the `InfoTree`s of `x` become subtrees of a node
+containing the `Info` produced by `mkInfo`, which is then added to the `InfoTree`s in `m`.
+If `x` succeeds and `mkInfo` yields an `MVarId`, the `InfoTree`s of `x` are discarded and a `hole`
+node is added to the `InfoTree`s in `m`.
+If `x` fails, the `InfoTree`s of `x` become subtrees of a node containing the `Info` produced by
+`mkInfoOnError`, which is then added to the `InfoTree`s in `m`.
+
+The `InfoTree`s in `m` are reset before `x` is executed and restored with the addition of a new tree
+after `x` is executed.
+-/
+def withInfoContext'
+    [MonadFinally m]
+    (x : m α)
+    (mkInfo : α → m (Sum Info MVarId))
+    (mkInfoOnError : m Info) :
+    m α := do
   if (← getInfoState).enabled then
     let treesSaved ← getResetInfoTrees
     Prod.fst <$> MonadFinally.tryFinally' x fun a? => do
-      match a? with
-      | none   => modifyInfoTrees fun _ => treesSaved
-      | some a =>
-        let info ← mkInfo a
-        modifyInfoTrees fun trees =>
-          match info with
-          | Sum.inl info   => treesSaved.push <| InfoTree.node info trees
-          | Sum.inr mvarId => treesSaved.push <| InfoTree.hole mvarId
+      let info ← do
+        match a? with
+        | none => pure <| .inl <| ← mkInfoOnError
+        | some a => mkInfo a
+      modifyInfoTrees fun trees =>
+        match info with
+        | Sum.inl info   => treesSaved.push <| InfoTree.node info trees
+        | Sum.inr mvarId => treesSaved.push <| InfoTree.hole mvarId
   else
     x
 
diff --git a/src/Lean/Elab/InfoTree/Types.lean b/src/Lean/Elab/InfoTree/Types.lean
index 02a189bb28..5ecdd7dde9 100644
--- a/src/Lean/Elab/InfoTree/Types.lean
+++ b/src/Lean/Elab/InfoTree/Types.lean
@@ -70,6 +70,18 @@ structure TermInfo extends ElabInfo where
   isBinder : Bool := false
   deriving Inhabited
 
+/--
+Used instead of `TermInfo` when a term couldn't successfully be elaborated,
+and so there is no complete expression available.
+
+The main purpose of `PartialTermInfo` is to ensure that the sub-`InfoTree`s of a failed elaborator
+are retained so that they can still be used in the language server.
+-/
+structure PartialTermInfo extends ElabInfo where
+  lctx : LocalContext -- The local context when the term was elaborated.
+  expectedType? : Option Expr
+  deriving Inhabited
+
 structure CommandInfo extends ElabInfo where
   deriving Inhabited
 
@@ -79,7 +91,7 @@ inductive CompletionInfo where
   | dot (termInfo : TermInfo) (expectedType? : Option Expr)
   | id (stx : Syntax) (id : Name) (danglingDot : Bool) (lctx : LocalContext) (expectedType? : Option Expr)
   | dotId (stx : Syntax) (id : Name) (lctx : LocalContext) (expectedType? : Option Expr)
-  | fieldId (stx : Syntax) (id : Name) (lctx : LocalContext) (structName : Name)
+  | fieldId (stx : Syntax) (id : Option Name) (lctx : LocalContext) (structName : Name)
   | namespaceId (stx : Syntax)
   | option (stx : Syntax)
   | endSection (stx : Syntax) (scopeNames : List String)
@@ -165,10 +177,18 @@ regular delaboration settings.
 structure OmissionInfo extends TermInfo where
   reason : String
 
+/--
+Indicates that all overloaded elaborators failed. The subtrees of a `ChoiceInfo` node are the
+partial `InfoTree`s of those failed elaborators. Retaining these partial `InfoTree`s helps
+the language server provide interactivity even when all overloaded elaborators failed.
+-/
+structure ChoiceInfo extends ElabInfo where
+
 /-- Header information for a node in `InfoTree`. -/
 inductive Info where
   | ofTacticInfo (i : TacticInfo)
   | ofTermInfo (i : TermInfo)
+  | ofPartialTermInfo (i : PartialTermInfo)
   | ofCommandInfo (i : CommandInfo)
   | ofMacroExpansionInfo (i : MacroExpansionInfo)
   | ofOptionInfo (i : OptionInfo)
@@ -179,6 +199,7 @@ inductive Info where
   | ofFVarAliasInfo (i : FVarAliasInfo)
   | ofFieldRedeclInfo (i : FieldRedeclInfo)
   | ofOmissionInfo (i : OmissionInfo)
+  | ofChoiceInfo (i : ChoiceInfo)
   deriving Inhabited
 
 /-- The InfoTree is a structure that is generated during elaboration and used
diff --git a/src/Lean/Elab/LetRec.lean b/src/Lean/Elab/LetRec.lean
index 03c2adc497..22663d0055 100644
--- a/src/Lean/Elab/LetRec.lean
+++ b/src/Lean/Elab/LetRec.lean
@@ -90,9 +90,12 @@ private def elabLetRecDeclValues (view : LetRecView) : TermElabM (Array Expr) :=
       for i in [0:view.binderIds.size] do
         addLocalVarInfo view.binderIds[i]! xs[i]!
       withDeclName view.declName do
-        withInfoContext' view.valStx (mkInfo := (pure <| .inl <| mkBodyInfo view.valStx ·)) do
-          let value ← elabTermEnsuringType view.valStx type
-          mkLambdaFVars xs value
+        withInfoContext' view.valStx
+          (mkInfo := (pure <| .inl <| mkBodyInfo view.valStx ·))
+          (mkInfoOnError := (pure <| mkBodyInfo view.valStx none))
+          do
+             let value ← elabTermEnsuringType view.valStx type
+             mkLambdaFVars xs value
 
 private def registerLetRecsToLift (views : Array LetRecDeclView) (fvars : Array Expr) (values : Array Expr) : TermElabM Unit := do
   let letRecsToLiftCurr := (← get).letRecsToLift
diff --git a/src/Lean/Elab/Match.lean b/src/Lean/Elab/Match.lean
index e9e1085a94..3fb9c33c86 100644
--- a/src/Lean/Elab/Match.lean
+++ b/src/Lean/Elab/Match.lean
@@ -644,7 +644,7 @@ where
       if inaccessible? p |>.isSome then
         return mkMData k (← withReader (fun _ => true) (go b))
       else if let some (stx, p) := patternWithRef? p then
-        Elab.withInfoContext' (go p) fun p => do
+        Elab.withInfoContext' (go p) (mkInfoOnError := mkPartialTermInfo .anonymous stx) fun p => do
           /- If `p` is a free variable and we are not inside of an "inaccessible" pattern, this `p` is a binder. -/
           mkTermInfo Name.anonymous stx p (isBinder := p.isFVar && !(← read))
       else
diff --git a/src/Lean/Elab/MutualDef.lean b/src/Lean/Elab/MutualDef.lean
index d31248655b..098b015256 100644
--- a/src/Lean/Elab/MutualDef.lean
+++ b/src/Lean/Elab/MutualDef.lean
@@ -283,7 +283,7 @@ private partial def withFunLocalDecls {α} (headers : Array DefViewElabHeader) (
   loop 0 #[]
 
 private def expandWhereStructInst : Macro
-  | `(Parser.Command.whereStructInst|where $[$decls:letDecl];* $[$whereDecls?:whereDecls]?) => do
+  | whereStx@`(Parser.Command.whereStructInst|where%$whereTk $[$decls:letDecl];* $[$whereDecls?:whereDecls]?) => do
     let letIdDecls ← decls.mapM fun stx => match stx with
       | `(letDecl|$_decl:letPatDecl) => Macro.throwErrorAt stx "patterns are not allowed here"
       | `(letDecl|$decl:letEqnsDecl) => expandLetEqnsDecl decl (useExplicit := false)
@@ -300,7 +300,32 @@ private def expandWhereStructInst : Macro
         `(structInstField|$id:ident := $val)
       | stx@`(letIdDecl|_ $_* $[: $_]? := $_) => Macro.throwErrorAt stx "'_' is not allowed here"
       | _ => Macro.throwUnsupported
-    let body ← `(structInst| { $structInstFields,* })
+
+    let startOfStructureTkInfo : SourceInfo :=
+      match whereTk.getPos? with
+      | some pos => .synthetic pos ⟨pos.byteIdx + 1⟩ true
+      | none => .none
+    let startOfStructureTk : Syntax := .atom startOfStructureTkInfo "{"
+
+    -- Position the closing `}` at the end of the trailing whitespace of `where $[$_:letDecl];*`.
+    -- We need an accurate range of the generated structure instance for structure field completion.
+    let structureStxTailInfo :=
+      whereStx[1].getTailInfo?
+      <|> whereStx[0].getTailInfo?
+    let endOfStructureTkInfo : SourceInfo :=
+      match structureStxTailInfo with
+      | some (SourceInfo.original _ _ trailing _) =>
+        let tokenPos := trailing.str.prev trailing.stopPos
+        let tokenEndPos := trailing.stopPos
+        .synthetic tokenPos tokenEndPos true
+      | _ => .none
+    let endOfStructureTk : Syntax := .atom endOfStructureTkInfo "}"
+
+    let body ← `(structInst| {%$startOfStructureTk $structInstFields,* }%$endOfStructureTk)
+    let body := body.raw.setInfo <|
+      match startOfStructureTkInfo.getPos?, endOfStructureTkInfo.getTailPos? with
+      | some startPos, some endPos => .synthetic startPos endPos true
+      | _, _ => .none
     match whereDecls? with
     | some whereDecls => expandWhereDecls whereDecls body
     | none => return body
@@ -417,12 +442,15 @@ private def elabFunValues (headers : Array DefViewElabHeader) (vars : Array Expr
           -- Store instantiated body in info tree for the benefit of the unused variables linter
           -- and other metaprograms that may want to inspect it without paying for the instantiation
           -- again
-          withInfoContext' valStx (mkInfo := (pure <| .inl <| mkBodyInfo valStx ·)) do
-            -- synthesize mvars here to force the top-level tactic block (if any) to run
-            let val ← elabTermEnsuringType valStx type <* synthesizeSyntheticMVarsNoPostponing
-            -- NOTE: without this `instantiatedMVars`, `mkLambdaFVars` may leave around a redex that
-            -- leads to more section variables being included than necessary
-            instantiateMVarsProfiling val
+          withInfoContext' valStx
+            (mkInfo := (pure <| .inl <| mkBodyInfo valStx ·))
+            (mkInfoOnError := (pure <| mkBodyInfo valStx none))
+            do
+              -- synthesize mvars here to force the top-level tactic block (if any) to run
+              let val ← elabTermEnsuringType valStx type <* synthesizeSyntheticMVarsNoPostponing
+              -- NOTE: without this `instantiatedMVars`, `mkLambdaFVars` may leave around a redex that
+              -- leads to more section variables being included than necessary
+              instantiateMVarsProfiling val
         let val ← mkLambdaFVars xs val
         if linter.unusedSectionVars.get (← getOptions) && !header.type.hasSorry && !val.hasSorry then
           let unusedVars ← vars.filterMapM fun var => do
diff --git a/src/Lean/Elab/Term.lean b/src/Lean/Elab/Term.lean
index 62e688d215..5bc29658bf 100644
--- a/src/Lean/Elab/Term.lean
+++ b/src/Lean/Elab/Term.lean
@@ -1298,13 +1298,28 @@ def isTacticOrPostponedHole? (e : Expr) : TermElabM (Option MVarId) := do
     | _                                  => return none
   | _ => pure none
 
-def mkTermInfo (elaborator : Name) (stx : Syntax) (e : Expr) (expectedType? : Option Expr := none) (lctx? : Option LocalContext := none) (isBinder := false) : TermElabM (Sum Info MVarId) := do
+def mkTermInfo
+    (elaborator : Name)
+    (stx : Syntax)
+    (e : Expr)
+    (expectedType? : Option Expr := none)
+    (lctx? : Option LocalContext := none)
+    (isBinder := false) :
+    TermElabM (Sum Info MVarId) := do
   match (← isTacticOrPostponedHole? e) with
   | some mvarId => return Sum.inr mvarId
   | none =>
     let e := removeSaveInfoAnnotation e
     return Sum.inl <| Info.ofTermInfo { elaborator, lctx := lctx?.getD (← getLCtx), expr := e, stx, expectedType?, isBinder }
 
+def mkPartialTermInfo
+    (elaborator : Name)
+    (stx : Syntax)
+    (expectedType? : Option Expr := none)
+    (lctx? : Option LocalContext := none) :
+    TermElabM Info := do
+  return Info.ofPartialTermInfo { elaborator, lctx := lctx?.getD (← getLCtx), stx, expectedType? }
+
 /--
 Pushes a new leaf node to the info tree associating the expression `e` to the syntax `stx`.
 As a result, when the user hovers over `stx` they will see the type of `e`, and if `e`
@@ -1326,28 +1341,36 @@ def addTermInfo (stx : Syntax) (e : Expr) (expectedType? : Option Expr := none)
   if (← read).inPattern && !force then
     return mkPatternWithRef e stx
   else
-    withInfoContext' (pure ()) (fun _ => mkTermInfo elaborator stx e expectedType? lctx? isBinder) |> discard
+    discard <| withInfoContext'
+      (pure ())
+      (fun _ => mkTermInfo elaborator stx e expectedType? lctx? isBinder)
+      (mkPartialTermInfo elaborator stx expectedType? lctx?)
     return e
 
 def addTermInfo' (stx : Syntax) (e : Expr) (expectedType? : Option Expr := none) (lctx? : Option LocalContext := none) (elaborator := Name.anonymous) (isBinder := false) : TermElabM Unit :=
   discard <| addTermInfo stx e expectedType? lctx? elaborator isBinder
 
-def withInfoContext' (stx : Syntax) (x : TermElabM Expr) (mkInfo : Expr → TermElabM (Sum Info MVarId)) : TermElabM Expr := do
+def withInfoContext'
+    (stx : Syntax)
+    (x : TermElabM Expr)
+    (mkInfo : Expr → TermElabM (Sum Info MVarId))
+    (mkInfoOnError : TermElabM Info) :
+    TermElabM Expr := do
   if (← read).inPattern then
     let e ← x
     return mkPatternWithRef e stx
   else
-    Elab.withInfoContext' x mkInfo
+    Elab.withInfoContext' x mkInfo mkInfoOnError
 
 /-- Info node capturing `def/let rec` bodies, used by the unused variables linter. -/
 structure BodyInfo where
-  /-- The body as a fully elaborated term. -/
-  value : Expr
+  /-- The body as a fully elaborated term. `none` if the body failed to elaborate. -/
+  value? : Option Expr
 deriving TypeName
 
 /-- Creates an `Info.ofCustomInfo` node backed by a `BodyInfo`. -/
-def mkBodyInfo (stx : Syntax) (value : Expr) : Info :=
-  .ofCustomInfo { stx, value := .mk { value : BodyInfo } }
+def mkBodyInfo (stx : Syntax) (value? : Option Expr) : Info :=
+  .ofCustomInfo { stx, value := .mk { value? : BodyInfo } }
 
 /-- Extracts a `BodyInfo` custom info. -/
 def getBodyInfo? : Info → Option BodyInfo
@@ -1360,8 +1383,11 @@ ensures the info tree is updated and a hole id is introduced.
 When `stx` is elaborated, new info nodes are created and attached to the new hole id in the info tree.
 -/
 def postponeElabTerm (stx : Syntax) (expectedType? : Option Expr) : TermElabM Expr := do
-  withInfoContext' stx (mkInfo := mkTermInfo .anonymous (expectedType? := expectedType?) stx) do
-    postponeElabTermCore stx expectedType?
+  withInfoContext' stx
+    (mkInfo := mkTermInfo .anonymous (expectedType? := expectedType?) stx)
+    (mkInfoOnError := mkPartialTermInfo .anonymous (expectedType? := expectedType?) stx)
+    do
+      postponeElabTermCore stx expectedType?
 
 /--
   Helper function for `elabTerm` that tries the registered elaboration functions for `stxNode` kind until it finds one that supports the syntax or
@@ -1372,7 +1398,9 @@ private def elabUsingElabFnsAux (s : SavedState) (stx : Syntax) (expectedType? :
   | (elabFn::elabFns) =>
     try
       -- record elaborator in info tree, but only when not backtracking to other elaborators (outer `try`)
-      withInfoContext' stx (mkInfo := mkTermInfo elabFn.declName (expectedType? := expectedType?) stx)
+      withInfoContext' stx
+        (mkInfo := mkTermInfo elabFn.declName (expectedType? := expectedType?) stx)
+        (mkInfoOnError := mkPartialTermInfo elabFn.declName (expectedType? := expectedType?) stx)
         (try
           elabFn.value stx expectedType?
         catch ex => match ex with
@@ -1755,10 +1783,12 @@ private partial def elabTermAux (expectedType? : Option Expr) (catchExPostpone :
     let result ← match (← liftMacroM (expandMacroImpl? env stx)) with
     | some (decl, stxNew?) =>
       let stxNew ← liftMacroM <| liftExcept stxNew?
-      withInfoContext' stx (mkInfo := mkTermInfo decl (expectedType? := expectedType?) stx) <|
-        withMacroExpansion stx stxNew <|
-          withRef stxNew <|
-            elabTermAux expectedType? catchExPostpone implicitLambda stxNew
+      withInfoContext' stx
+        (mkInfo := mkTermInfo decl (expectedType? := expectedType?) stx)
+        (mkInfoOnError := mkPartialTermInfo decl (expectedType? := expectedType?) stx) <|
+          withMacroExpansion stx stxNew <|
+            withRef stxNew <|
+              elabTermAux expectedType? catchExPostpone implicitLambda stxNew
     | _ =>
       let useImplicitResult ← if implicitLambda && (← read).implicitLambda then useImplicitLambda stx expectedType? else pure .no
       match useImplicitResult with
diff --git a/src/Lean/Linter/UnusedVariables.lean b/src/Lean/Linter/UnusedVariables.lean
index 5cefd948e5..74bcb7260e 100644
--- a/src/Lean/Linter/UnusedVariables.lean
+++ b/src/Lean/Linter/UnusedVariables.lean
@@ -393,16 +393,17 @@ where
         | .ofCustomInfo ti =>
           if !linter.unusedVariables.analyzeTactics.get ci.options then
             if let some bodyInfo := ti.value.get? Elab.Term.BodyInfo then
-              -- the body is the only `Expr` we will analyze in this case
-              -- NOTE: we include it even if no tactics are present as at least for parameters we want
-              -- to lint only truly unused binders
-              let (e, _) := instantiateMVarsCore ci.mctx bodyInfo.value
-              modify fun s => { s with
-                assignments := s.assignments.push (.insert {} ⟨.anonymous⟩ e) }
-              let tacticsPresent := children.any (·.findInfo? (· matches .ofTacticInfo ..) |>.isSome)
-              withReader (· || tacticsPresent) do
-                go children.toArray ci
-              return false
+              if let some value := bodyInfo.value? then
+                -- the body is the only `Expr` we will analyze in this case
+                -- NOTE: we include it even if no tactics are present as at least for parameters we want
+                -- to lint only truly unused binders
+                let (e, _) := instantiateMVarsCore ci.mctx value
+                modify fun s => { s with
+                  assignments := s.assignments.push (.insert {} ⟨.anonymous⟩ e) }
+                let tacticsPresent := children.any (·.findInfo? (· matches .ofTacticInfo ..) |>.isSome)
+                withReader (· || tacticsPresent) do
+                  go children.toArray ci
+                return false
         | .ofTermInfo ti =>
           if ignored then return true
           match ti.expr with
diff --git a/src/Lean/Server/Completion.lean b/src/Lean/Server/Completion.lean
index 0312a11714..0135bbe417 100644
--- a/src/Lean/Server/Completion.lean
+++ b/src/Lean/Server/Completion.lean
@@ -43,11 +43,13 @@ inductive CompletionIdentifier where
   deriving FromJson, ToJson
 
 /--
-`CompletionItemData` that also contains a `CompletionIdentifier`.
-See the documentation of`CompletionItemData` and `CompletionIdentifier`.
+`CompletionItemData` that contains additional information to identify the item
+in order to resolve it.
 -/
-structure CompletionItemDataWithId extends CompletionItemData where
-  id?    : Option CompletionIdentifier
+structure ResolvableCompletionItemData extends CompletionItemData where
+  /-- Position of the completion info that this completion item was created from. -/
+  cPos : Nat
+  id?  : Option CompletionIdentifier
   deriving FromJson, ToJson
 
 /--
@@ -74,6 +76,8 @@ def CompletionItem.resolve
 
   return item
 
+def CompletionList.empty : CompletionList := { items := #[], isIncomplete := true }
+
 end Lean.Lsp
 
 namespace Lean.Server.Completion
@@ -123,28 +127,26 @@ private def allowCompletion (eligibleHeaderDecls : EligibleHeaderDecls) (env : E
   eligibleHeaderDecls.contains declName ||
     env.constants.map₂.contains declName && Lean.Meta.allowCompletion env declName
 
-/--
-Sorts `items` descendingly according to their score and ascendingly according to their label
-for equal scores.
--/
-private def sortCompletionItems (items : Array (CompletionItem × Float)) : Array CompletionItem :=
-  let items := items.qsort fun (i1, s1) (i2, s2) =>
-    if s1 != s2 then
-      s1 > s2
-    else
-      i1.label.map (·.toLower) < i2.label.map (·.toLower)
-  items.map (·.1)
+structure ScoredCompletionItem where
+  item  : CompletionItem
+  score : Float
+  deriving Inhabited
+
+structure Context where
+  params            : CompletionParams
+  completionInfoPos : Nat
+
 
 /-- Intermediate state while completions are being computed. -/
 structure State where
   /-- All completion items and their fuzzy match scores so far. -/
-  items  : Array (CompletionItem × Float) := #[]
+  items  : Array ScoredCompletionItem := #[]
 
 /--
 Monad used for completion computation that allows modifying a completion `State` and reading
 `CompletionParams`.
 -/
-abbrev M := OptionT $ ReaderT CompletionParams $ StateRefT State MetaM
+abbrev M := ReaderT Context $ StateRefT State MetaM
 
 /-- Adds a new completion item to the state in `M`. -/
 private def addItem
@@ -152,10 +154,15 @@ private def addItem
     (score : Float)
     (id?   : Option CompletionIdentifier := none)
     : M Unit := do
-  let params ← read
-  let data := { params, id? : CompletionItemDataWithId }
+  let ctx ← read
+  let data := {
+    params := ctx.params,
+    cPos := ctx.completionInfoPos,
+    id?
+    : ResolvableCompletionItemData
+  }
   let item := { item with data? := toJson data }
-  modify fun s => { s with items := s.items.push (item, score) }
+  modify fun s => { s with items := s.items.push ⟨item, score⟩ }
 
 /--
 Adds a new completion item with the given `label`, `id`, `kind` and `score` to the state in `M`.
@@ -231,13 +238,16 @@ private def addNamespaceCompletionItem (ns : Name) (score : Float) : M Unit := d
   let item := { label := ns.toString, detail? := "namespace", documentation? := none, kind? := CompletionItemKind.module }
   addItem item score
 
-private def runM (params : CompletionParams) (ctx : ContextInfo) (lctx : LocalContext) (x : M Unit)
-    : IO (Option CompletionList) :=
+private def runM
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (lctx              : LocalContext)
+    (x                 : M Unit)
+    : IO (Array ScoredCompletionItem) :=
   ctx.runMetaM lctx do
-    match (← x.run |>.run params |>.run {}) with
-    | (none, _) => return none
-    | (some _, s) =>
-      return some { items := sortCompletionItems s.items, isIncomplete := true }
+    let (_, s) ← x.run ⟨params, completionInfoPos⟩ |>.run {}
+    return s.items
 
 private def matchAtomic (id : Name) (declName : Name) : Option Float :=
   match id, declName with
@@ -448,15 +458,16 @@ private def idCompletionCore
   completeNamespaces ctx id danglingDot
 
 private def idCompletion
-    (params        : CompletionParams)
-    (ctx           : ContextInfo)
-    (lctx          : LocalContext)
-    (stx           : Syntax)
-    (id            : Name)
-    (hoverInfo     : HoverInfo)
-    (danglingDot   : Bool)
-    : IO (Option CompletionList) :=
-  runM params ctx lctx do
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (lctx              : LocalContext)
+    (stx               : Syntax)
+    (id                : Name)
+    (hoverInfo         : HoverInfo)
+    (danglingDot       : Bool)
+    : IO (Array ScoredCompletionItem) :=
+  runM params completionInfoPos ctx lctx do
     idCompletionCore ctx stx id hoverInfo danglingDot
 
 private def unfoldeDefinitionGuarded? (e : Expr) : MetaM (Option Expr) :=
@@ -544,26 +555,17 @@ where
     visit type
 
 private def dotCompletion
-    (params        : CompletionParams)
-    (ctx           : ContextInfo)
-    (info          : TermInfo)
-    (hoverInfo     : HoverInfo)
-    : IO (Option CompletionList) :=
-  runM params ctx info.lctx do
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (info              : TermInfo)
+    : IO (Array ScoredCompletionItem) :=
+  runM params completionInfoPos ctx info.lctx do
     let nameSet ← try
       getDotCompletionTypeNames (← instantiateMVars (← inferType info.expr))
     catch _ =>
       pure RBTree.empty
-
     if nameSet.isEmpty then
-      let stx := info.stx
-      if stx.isIdent then
-        idCompletionCore ctx stx stx.getId hoverInfo (danglingDot := false)
-      else if stx.getKind == ``Lean.Parser.Term.completion && stx[0].isIdent then
-        -- TODO: truncation when there is a dangling dot
-        idCompletionCore ctx stx stx[0].getId HoverInfo.after (danglingDot := true)
-      else
-        failure
       return
 
     forEligibleDeclsM fun declName c => do
@@ -579,13 +581,14 @@ private def dotCompletion
       addUnresolvedCompletionItem (.mkSimple c.name.getString!) (.const c.name) (kind := completionKind) 1
 
 private def dotIdCompletion
-    (params        : CompletionParams)
-    (ctx           : ContextInfo)
-    (lctx          : LocalContext)
-    (id            : Name)
-    (expectedType? : Option Expr)
-    : IO (Option CompletionList) :=
-  runM params ctx lctx do
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (lctx              : LocalContext)
+    (id                : Name)
+    (expectedType?     : Option Expr)
+    : IO (Array ScoredCompletionItem) :=
+  runM params completionInfoPos ctx lctx do
     let some expectedType := expectedType?
       | return ()
 
@@ -620,14 +623,15 @@ private def dotIdCompletion
       addUnresolvedCompletionItem label (.const c.name) completionKind score
 
 private def fieldIdCompletion
-    (params     : CompletionParams)
-    (ctx        : ContextInfo)
-    (lctx       : LocalContext)
-    (id         : Name)
-    (structName : Name)
-    : IO (Option CompletionList) :=
-  runM params ctx lctx do
-    let idStr := id.toString
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (lctx              : LocalContext)
+    (id                : Option Name)
+    (structName        : Name)
+    : IO (Array ScoredCompletionItem) :=
+  runM params completionInfoPos ctx lctx do
+    let idStr := id.map (·.toString) |>.getD ""
     let fieldNames := getStructureFieldsFlattened (← getEnv) structName (includeSubobjectFields := false)
     for fieldName in fieldNames do
       let .str _ fieldName := fieldName | continue
@@ -636,11 +640,12 @@ private def fieldIdCompletion
       addItem item score
 
 private def optionCompletion
-    (params : CompletionParams)
-    (ctx    : ContextInfo)
-    (stx    : Syntax)
-    (caps   : ClientCapabilities)
-    : IO (Option CompletionList) :=
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    (stx               : Syntax)
+    (caps              : ClientCapabilities)
+    : IO (Array ScoredCompletionItem) :=
   ctx.runMetaM {} do
     let (partialName, trailingDot) :=
       -- `stx` is from `"set_option" >> ident`
@@ -667,28 +672,36 @@ private def optionCompletion
             some { newText := name.toString, insert := range, replace := range : InsertReplaceEdit }
           else
             none
-        items := items.push
-          ({ label := name.toString
-             detail? := s!"({opts.get name decl.defValue}), {decl.descr}"
-             documentation? := none,
-             kind? := CompletionItemKind.property -- TODO: investigate whether this is the best kind for options.
-             textEdit? := textEdit
-             data? := toJson { params, id? := none : CompletionItemDataWithId } }, score)
-    return some { items := sortCompletionItems items, isIncomplete := true }
+        items := items.push ⟨{
+            label := name.toString
+            detail? := s!"({opts.get name decl.defValue}), {decl.descr}"
+            documentation? := none,
+            kind? := CompletionItemKind.property -- TODO: investigate whether this is the best kind for options.
+            textEdit? := textEdit
+            data? := toJson {
+              params,
+              cPos := completionInfoPos,
+              id? := none : ResolvableCompletionItemData
+            }
+          }, score⟩
+    return items
 
-private def tacticCompletion (params : CompletionParams) (ctx : ContextInfo)
-    : IO (Option CompletionList) := ctx.runMetaM .empty do
+private def tacticCompletion
+    (params            : CompletionParams)
+    (completionInfoPos : Nat)
+    (ctx               : ContextInfo)
+    : IO (Array ScoredCompletionItem) := ctx.runMetaM .empty do
   let allTacticDocs ← Tactic.Doc.allTacticDocs
-  let items : Array (CompletionItem × Float) := allTacticDocs.map fun tacticDoc =>
-    ({
+  let items : Array ScoredCompletionItem := allTacticDocs.map fun tacticDoc =>
+    ⟨{
       label          := tacticDoc.userName
       detail?        := none
       documentation? := tacticDoc.docString.map fun docString =>
         { value := docString, kind := MarkupKind.markdown : MarkupContent }
       kind?          := CompletionItemKind.keyword
-      data?          := toJson { params, id? := none : CompletionItemDataWithId }
-    }, 1)
-  return some { items := sortCompletionItems items, isIncomplete := true }
+      data?          := toJson { params, cPos := completionInfoPos, id? := none : ResolvableCompletionItemData }
+    }, 1⟩
+  return items
 
 private def findBest?
     (infoTree : InfoTree)
@@ -794,6 +807,13 @@ private partial def getIndentationAmount (fileMap : FileMap) (line : Nat) : Nat
     it := it.next
   return indentationAmount
 
+private partial def isCursorOnWhitespace (fileMap : FileMap) (hoverPos : String.Pos) : Bool :=
+  fileMap.source.atEnd hoverPos || (fileMap.source.get hoverPos).isWhitespace
+
+private partial def isCursorInProperWhitespace (fileMap : FileMap) (hoverPos : String.Pos) : Bool :=
+  (fileMap.source.atEnd hoverPos || (fileMap.source.get hoverPos).isWhitespace)
+    && (fileMap.source.get (hoverPos - ⟨1⟩)).isWhitespace
+
 private partial def isSyntheticTacticCompletion
     (fileMap  : FileMap)
     (hoverPos : String.Pos)
@@ -860,7 +880,7 @@ where
     -- tactic completions are only provided at the same indentation level as the other tactics in
     -- that tactic block.
     let isCursorInTacticBlock := hoverLineIndentation == firstTacticIndentation
-    return isCursorInProperWhitespace && isCursorInTacticBlock
+    return isCursorInProperWhitespace fileMap hoverPos && isCursorInTacticBlock
 
   isCompletionAfterSemicolon (stx : Syntax) : Bool := Id.run do
     let some tacticsNode := getTacticsNode? stx
@@ -868,7 +888,7 @@ where
     let tactics := tacticsNode.getArgs
     -- We want to provide completions in the case of `skip;<CURSOR>`, so the cursor must only be on
     -- whitespace, not in proper whitespace.
-    return isCursorOnWhitspace && tactics.any fun tactic => Id.run do
+    return isCursorOnWhitespace fileMap hoverPos && tactics.any fun tactic => Id.run do
       let some tailPos := tactic.getTailPos?
         | return false
       let isCursorAfterSemicolon :=
@@ -886,14 +906,7 @@ where
       none
 
   isCompletionInEmptyTacticBlock (stx : Syntax) : Bool :=
-    isCursorInProperWhitespace && isEmptyTacticBlock stx
-
-  isCursorOnWhitspace : Bool :=
-    fileMap.source.atEnd hoverPos || (fileMap.source.get hoverPos).isWhitespace
-
-  isCursorInProperWhitespace : Bool :=
-    (fileMap.source.atEnd hoverPos || (fileMap.source.get hoverPos).isWhitespace)
-      && (fileMap.source.get (hoverPos - ⟨1⟩)).isWhitespace
+    isCursorInProperWhitespace fileMap hoverPos && isEmptyTacticBlock stx
 
   isEmptyTacticBlock (stx : Syntax) : Bool :=
     stx.getKind == `Lean.Parser.Tactic.tacticSeq && isEmpty stx
@@ -936,86 +949,300 @@ private def findSyntheticTacticCompletion?
   -- Neither `HoverInfo` nor the syntax in `.tactic` are important for tactic completion.
   return (HoverInfo.after, ctx, .tactic .missing)
 
-private def findCompletionInfoAt?
+private def findExpectedTypeAt (infoTree : InfoTree) (hoverPos : String.Pos) : Option (ContextInfo × Expr) := do
+  let (ctx, .ofTermInfo i) ← infoTree.smallestInfo? fun i => Id.run do
+      let some pos := i.pos?
+        | return false
+      let some tailPos := i.tailPos?
+        | return false
+      let .ofTermInfo ti := i
+        | return false
+      return ti.expectedType?.isSome && pos <= hoverPos && hoverPos <= tailPos
+    | none
+  (ctx, i.expectedType?.get!)
+
+private structure HoverData where
+  fileMap                    : FileMap
+  hoverPos                   : String.Pos
+  hoverFilePos               : Position
+  hoverLineIndentation       : Nat
+  isCursorOnWhitespace       : Bool
+  isCursorInProperWhitespace : Bool
+
+private def HoverData.ofPosInFile
+    (fileMap  : FileMap)
+    (hoverPos : String.Pos)
+    : HoverData := Id.run do
+  let hoverFilePos := fileMap.toPosition hoverPos
+  let mut hoverLineIndentation := getIndentationAmount fileMap hoverFilePos.line
+  if hoverFilePos.column < hoverLineIndentation then
+    -- Ignore trailing whitespace after the cursor
+    hoverLineIndentation := hoverFilePos.column
+  let isCursorOnWhitespace := Completion.isCursorOnWhitespace fileMap hoverPos
+  let isCursorInProperWhitespace := Completion.isCursorInProperWhitespace fileMap hoverPos
+  return {
+    fileMap,
+    hoverPos,
+    hoverFilePos,
+    hoverLineIndentation
+    isCursorOnWhitespace,
+    isCursorInProperWhitespace
+  }
+
+private structure SepBy1Data (ks : SyntaxNodeKinds) (sep : String) where
+  sepBy1Stx   : Syntax.TSepArray ks sep
+  outerBounds : String.Range
+
+private def isCompletionInSepBy1
+    {ks  : SyntaxNodeKinds}
+    {sep : String}
+    (hd  : HoverData)
+    (sd  : SepBy1Data ks sep)
+    : Bool := Id.run do
+  if ! hd.isCursorOnWhitespace then
+    return false
+
+  let isCompletionInEmptyBlock :=
+    sd.sepBy1Stx.elemsAndSeps.isEmpty && sd.outerBounds.contains hd.hoverPos (includeStop := true)
+  if isCompletionInEmptyBlock then
+    return true
+
+  let isCompletionAfterSep := sd.sepBy1Stx.elemsAndSeps.any fun fieldOrSep => Id.run do
+    if ! fieldOrSep.isToken sep then
+      return false
+    let some sepTailPos := fieldOrSep.getTailPos?
+      | return false
+    return sepTailPos <= hd.hoverPos
+      && hd.hoverPos.byteIdx <= sepTailPos.byteIdx + fieldOrSep.getTrailingSize
+  if isCompletionAfterSep then
+    return true
+
+  let isCompletionOnIndentation := Id.run do
+    if ! hd.isCursorInProperWhitespace then
+      return false
+    let isCursorInIndentation := hd.hoverFilePos.column <= hd.hoverLineIndentation
+    if ! isCursorInIndentation then
+      return false
+    let some firstFieldPos := sd.sepBy1Stx.elemsAndSeps[0]?.getD Syntax.missing |>.getPos?
+      | return false
+    let firstFieldLine := hd.fileMap.toPosition firstFieldPos |>.line
+    let firstFieldIndentation := getIndentationAmount hd.fileMap firstFieldLine
+    let isCursorInBlock := hd.hoverLineIndentation == firstFieldIndentation
+    return isCursorInBlock
+  return isCompletionOnIndentation
+
+private def isSyntheticWhereBlockFieldCompletion
+  (fileMap  : FileMap)
+  (hoverPos : String.Pos)
+  (cmdStx   : Syntax)
+  : Bool :=
+  let hd := HoverData.ofPosInFile fileMap hoverPos
+  Option.isSome <| cmdStx.find? fun stx => Id.run do
+    let `(Parser.Command.whereStructInst|where $structFields:whereStructField;* $[$_:whereDecls]?) :=
+        stx
+      | return false
+    let some outerBoundStart := stx[0].getTailPos? (canonicalOnly := true)
+      | return false
+    let some outerBoundStop :=
+        stx[2].getPos? (canonicalOnly := true)
+        <|> stx[1].getTrailingTailPos? (canonicalOnly := true)
+        <|> stx[0].getTrailingTailPos? (canonicalOnly := true)
+      | return false
+    let sd : SepBy1Data _ _ := {
+      sepBy1Stx   := structFields
+      outerBounds := {
+        start := outerBoundStart
+        stop  := outerBoundStop
+      }
+    }
+    return isCompletionInSepBy1 hd sd
+
+private def isSyntheticStructInstFieldCompletion
+  (fileMap  : FileMap)
+  (hoverPos : String.Pos)
+  (cmdStx   : Syntax)
+  : Bool :=
+  let hd := HoverData.ofPosInFile fileMap hoverPos
+  Option.isSome <| cmdStx.find? fun stx => Id.run do
+    let `(Lean.Parser.Term.structInst| { $[$srcs,* with]? $fields,* $[..%$ell]? $[: $ty]? }) :=
+        stx
+      | return false
+    let some outerBoundStart :=
+        stx[1].getTailPos? (canonicalOnly := true)
+        <|> stx[0].getTailPos? (canonicalOnly := true)
+      | return false
+    let some outerBoundStop :=
+        stx[3].getPos? (canonicalOnly := true)
+        <|> stx[4].getPos? (canonicalOnly := true)
+        <|> stx[5].getPos? (canonicalOnly := true)
+      | return false
+    let sd : SepBy1Data _ _ := {
+      sepBy1Stx   := fields
+      outerBounds := {
+        start := outerBoundStart
+        stop  := outerBoundStop
+      }
+    }
+    return isCompletionInSepBy1 hd sd
+
+private def findSyntheticFieldCompletion?
+  (fileMap  : FileMap)
+  (hoverPos : String.Pos)
+  (cmdStx   : Syntax)
+  (infoTree : InfoTree)
+  : Option (HoverInfo × ContextInfo × CompletionInfo) := do
+  if ! isSyntheticWhereBlockFieldCompletion fileMap hoverPos cmdStx
+      && ! isSyntheticStructInstFieldCompletion fileMap hoverPos cmdStx then
+    none
+  let (ctx, expectedType) ← findExpectedTypeAt infoTree hoverPos
+  let .const typeName _ := expectedType.getAppFn
+    | none
+  if ! isStructure ctx.env typeName then
+    none
+  return (HoverInfo.after, ctx, .fieldId .missing none .empty typeName)
+
+private def findCompletionInfosAt
     (fileMap  : FileMap)
     (hoverPos : String.Pos)
     (cmdStx   : Syntax)
     (infoTree : InfoTree)
-    : Option (HoverInfo × ContextInfo × CompletionInfo) :=
+    : Array (HoverInfo × ContextInfo × CompletionInfo) :=
   let ⟨hoverLine, _⟩ := fileMap.toPosition hoverPos
-  match infoTree.foldInfo (init := none) (choose hoverLine) with
-  | some (hoverInfo, ctx, Info.ofCompletionInfo info) =>
-    some (hoverInfo, ctx, info)
-  | _ =>
-    findSyntheticTacticCompletion? fileMap hoverPos cmdStx infoTree <|>
-      findSyntheticIdentifierCompletion? hoverPos infoTree
+  let completionInfoCandidates := infoTree.foldInfo (init := #[]) (choose hoverLine)
+  if ! completionInfoCandidates.isEmpty then
+    completionInfoCandidates
+  else
+    let syntheticCompletionData? :=
+      findSyntheticTacticCompletion? fileMap hoverPos cmdStx infoTree <|>
+        findSyntheticFieldCompletion? fileMap hoverPos cmdStx infoTree <|>
+          findSyntheticIdentifierCompletion? hoverPos infoTree
+    syntheticCompletionData?.map (#[·]) |>.getD #[]
+
 where
+
   choose
       (hoverLine : Nat)
       (ctx       : ContextInfo)
       (info      : Info)
-      (best?     : Option (HoverInfo × ContextInfo × Info))
-      : Option (HoverInfo × ContextInfo × Info) :=
-    if !info.isCompletion then
-      best?
-    else if info.occursInOrOnBoundary hoverPos then
-      let headPos := info.pos?.get!
-      let tailPos := info.tailPos?.get!
-      let hoverInfo :=
-        if hoverPos < tailPos then
-          HoverInfo.inside (hoverPos - headPos).byteIdx
-        else
-          HoverInfo.after
-      let ⟨headPosLine, _⟩ := fileMap.toPosition headPos
-      let ⟨tailPosLine, _⟩ := fileMap.toPosition info.tailPos?.get!
-      if headPosLine != hoverLine || headPosLine != tailPosLine then
-        best?
-      else match best? with
-        | none              => (hoverInfo, ctx, info)
-        | some (_, _, best) =>
-          if isBetter info best then
-            (hoverInfo, ctx, info)
-          else
-            best?
-    else
-      best?
-
-  isBetter : Info → Info → Bool
-    | i₁@(.ofCompletionInfo ci₁), i₂@(.ofCompletionInfo ci₂) =>
-      -- Use the smallest info available and prefer non-id completion over id completions as a
-      -- tie-breaker.
-      -- This is necessary because the elaborator sometimes generates both for the same range.
-      -- If two infos are equivalent, always prefer the first one.
-      if i₁.isSmaller i₂ then
-        true
-      else if i₂.isSmaller i₁ then
-        false
-      else if !(ci₁ matches .id ..) && ci₂ matches .id .. then
-        true
-      else if ci₁ matches .id .. && !(ci₂ matches .id ..) then
-        false
+      (best     : Array (HoverInfo × ContextInfo × CompletionInfo))
+      : Array (HoverInfo × ContextInfo × CompletionInfo) := Id.run do
+    let .ofCompletionInfo completionInfo := info
+      | return best
+    if ! info.occursInOrOnBoundary hoverPos then
+      return best
+    let headPos := info.pos?.get!
+    let tailPos := info.tailPos?.get!
+    let hoverInfo :=
+      if hoverPos < tailPos then
+        HoverInfo.inside (hoverPos - headPos).byteIdx
       else
-        true
-    | .ofCompletionInfo _, _ => true
-    | _, .ofCompletionInfo _ => false
-    | _, _ => true
+        HoverInfo.after
+    let ⟨headPosLine, _⟩ := fileMap.toPosition headPos
+    let ⟨tailPosLine, _⟩ := fileMap.toPosition info.tailPos?.get!
+    if headPosLine != hoverLine || headPosLine != tailPosLine then
+      return best
+    return best.push (hoverInfo, ctx, completionInfo)
+
+private def filterDuplicateCompletionInfos
+    (infos : Array (HoverInfo × ContextInfo × CompletionInfo))
+    : Array (HoverInfo × ContextInfo × CompletionInfo) := Id.run do
+  -- We don't expect there to be too many duplicate completion infos,
+  -- so it's fine if this is quadratic (we don't need to implement `Hashable` / `LT` this way).
+  let mut deduplicatedInfos : Array (HoverInfo × ContextInfo × CompletionInfo) := #[]
+  for i@⟨_, _, ci⟩ in infos do
+    if deduplicatedInfos.any (fun ⟨_, _, di⟩ => eq di ci) then
+      continue
+    deduplicatedInfos := deduplicatedInfos.push i
+  deduplicatedInfos
+where
+  eq : CompletionInfo → CompletionInfo → Bool
+    | .dot ti₁ .., .dot ti₂ .. =>
+      ti₁.stx.eqWithInfo ti₂.stx && ti₁.expr == ti₂.expr
+    | .id stx₁ id₁ .., .id stx₂ id₂ .. =>
+      stx₁.eqWithInfo stx₂ && id₁ == id₂
+    | .dotId stx₁ id₁ .., .id stx₂ id₂ .. =>
+      stx₁.eqWithInfo stx₂ && id₁ == id₂
+    | .fieldId stx₁ id₁? _ structName₁, .fieldId stx₂ id₂? _ structName₂ =>
+      stx₁.eqWithInfo stx₂ && id₁? == id₂? && structName₁ == structName₂
+    | .namespaceId stx₁, .namespaceId stx₂ =>
+      stx₁.eqWithInfo stx₂
+    | .option stx₁, .option stx₂ =>
+      stx₁.eqWithInfo stx₂
+    | .endSection stx₁ scopeNames₁, .endSection stx₂ scopeNames₂ =>
+      stx₁.eqWithInfo stx₂ && scopeNames₁ == scopeNames₂
+    | .tactic stx₁, .tactic stx₂ =>
+      stx₁.eqWithInfo stx₂
+    | _, _ =>
+      false
+
+private def computePrioritizedCompletionPartitions
+    (items : Array ((HoverInfo × ContextInfo × CompletionInfo) × Nat))
+    : Array (Array ((HoverInfo × ContextInfo × CompletionInfo) × Nat)) :=
+  let partitions := items.groupByKey fun ((_, _, info), _) =>
+    let isId := info matches .id ..
+    let size? := Info.ofCompletionInfo info |>.size?
+    (isId, size?)
+  -- Sort partitions so that non-id completions infos come before id completion infos and
+  -- within those two groups, smaller sizes come before larger sizes.
+  let partitionsByPriority := partitions.toArray.qsort
+    fun ((isId₁, size₁?), _) ((isId₂, size₂?), _) =>
+      match size₁?, size₂? with
+      | some _, none   => true
+      | none,   some _ => false
+      | _, _ =>
+        match isId₁, isId₂ with
+        | false, true  => true
+        | true,  false => false
+        | _,     _     => Id.run do
+          let some size₁ := size₁?
+            | return false
+          let some size₂ := size₂?
+            | return false
+          return size₁ < size₂
+  partitionsByPriority.map (·.2)
+
+private def filterDuplicateCompletionItems
+    (items : Array ScoredCompletionItem)
+    : Array ScoredCompletionItem :=
+  let duplicationGroups := items.groupByKey fun s => (
+      s.item.label,
+      s.item.textEdit?,
+      s.item.detail?,
+      s.item.kind?,
+      s.item.tags?,
+      s.item.documentation?,
+    )
+  duplicationGroups.map (fun _ duplicateItems => duplicateItems.getMax? (·.score < ·.score) |>.get!)
+    |>.valuesArray
+
+/--
+Sorts `items` descendingly according to their score and ascendingly according to their label
+for equal scores.
+-/
+private def sortCompletionItems (items : Array ScoredCompletionItem) : Array CompletionItem :=
+  let items := items.qsort fun ⟨i1, s1⟩ ⟨i2, s2⟩ =>
+    if s1 != s2 then
+      s1 > s2
+    else
+      i1.label.map (·.toLower) < i2.label.map (·.toLower)
+  items.map (·.1)
 
 /--
 Assigns the `CompletionItem.sortText?` for all items in `completions` according to their order
 in `completions`. This is necessary because clients will use their own sort order if the server
 does not set it.
 -/
-private def assignSortTexts (completions : CompletionList) : CompletionList := Id.run do
-  if completions.items.isEmpty then
-    return completions
-  let items := completions.items.mapIdx fun i item =>
+private def assignSortTexts (completions : Array CompletionItem) : Array CompletionItem := Id.run do
+  if completions.isEmpty then
+    return #[]
+  let items := completions.mapIdx fun i item =>
     { item with sortText? := toString i }
   let maxDigits := items[items.size - 1]!.sortText?.get!.length
   let items := items.map fun item =>
     let sortText := item.sortText?.get!
     let pad := List.replicate (maxDigits - sortText.length) '0' |>.asString
     { item with sortText? := pad ++ sortText }
-  { completions with items := items }
+  items
 
 partial def find?
     (params   : CompletionParams)
@@ -1024,39 +1251,61 @@ partial def find?
     (cmdStx   : Syntax)
     (infoTree : InfoTree)
     (caps     : ClientCapabilities)
-    : IO (Option CompletionList) := do
-  let some (hoverInfo, ctx, info) := findCompletionInfoAt? fileMap hoverPos cmdStx infoTree
-    | return none
-  let completionList? ←
-    match info with
-    | .dot info .. =>
-      dotCompletion params ctx info hoverInfo
-    | .id stx id danglingDot lctx .. =>
-      idCompletion params ctx lctx stx id hoverInfo danglingDot
-    | .dotId _ id lctx expectedType? =>
-      dotIdCompletion params ctx lctx id expectedType?
-    | .fieldId _ id lctx structName =>
-      fieldIdCompletion params ctx lctx id structName
-    | .option stx =>
-      optionCompletion params ctx stx caps
-    | .tactic .. =>
-      tacticCompletion params ctx
-    | _ => return none
-  return completionList?.map assignSortTexts
+    : IO CompletionList := do
+  let completionInfos := findCompletionInfosAt fileMap hoverPos cmdStx infoTree
+    |> filterDuplicateCompletionInfos
+    |>.zipWithIndex
+  if completionInfos.isEmpty then
+    return .empty
+
+  let prioritizedPartitions := computePrioritizedCompletionPartitions completionInfos
+  let mut allCompletions := #[]
+  for partition in prioritizedPartitions do
+    for ((hoverInfo, ctx, info), completionInfoPos) in partition do
+      let completions : Array ScoredCompletionItem ←
+        match info with
+        | .id stx id danglingDot lctx .. =>
+          idCompletion params completionInfoPos ctx lctx stx id hoverInfo danglingDot
+        | .dot info .. =>
+          dotCompletion params completionInfoPos ctx info
+        | .dotId _ id lctx expectedType? =>
+          dotIdCompletion params completionInfoPos ctx lctx id expectedType?
+        | .fieldId _ id lctx structName =>
+          fieldIdCompletion params completionInfoPos ctx lctx id structName
+        | .option stx =>
+          optionCompletion params completionInfoPos ctx stx caps
+        | .tactic .. =>
+          tacticCompletion params completionInfoPos ctx
+        | _ =>
+          pure #[]
+      allCompletions := allCompletions ++ completions
+    if ! allCompletions.isEmpty then
+      -- Stop accumulating completions with lower priority if we found completions for a higher
+      -- priority.
+      break
+
+  let finalCompletions := allCompletions
+    |> filterDuplicateCompletionItems
+    |> sortCompletionItems
+    |> assignSortTexts
+  return { items := finalCompletions, isIncomplete := true }
 
 /--
 Fills the `CompletionItem.detail?` field of `item` using the pretty-printed type identified by `id`
 in the context found at `hoverPos` in `infoTree`.
 -/
 def resolveCompletionItem?
-    (fileMap  : FileMap)
-    (hoverPos : String.Pos)
-    (cmdStx   : Syntax)
-    (infoTree : InfoTree)
-    (item     : CompletionItem)
-    (id       : CompletionIdentifier)
+    (fileMap           : FileMap)
+    (hoverPos          : String.Pos)
+    (cmdStx            : Syntax)
+    (infoTree          : InfoTree)
+    (item              : CompletionItem)
+    (id                : CompletionIdentifier)
+    (completionInfoPos : Nat)
     : IO CompletionItem := do
-  let some (_, ctx, info) := findCompletionInfoAt? fileMap hoverPos cmdStx infoTree
+  let completionInfos := filterDuplicateCompletionInfos <|
+    findCompletionInfosAt fileMap hoverPos cmdStx infoTree
+  let some (_, ctx, info) := completionInfos.get? completionInfoPos
     | return item
   ctx.runMetaM info.lctx (item.resolve id)
 
diff --git a/src/Lean/Server/FileWorker/RequestHandling.lean b/src/Lean/Server/FileWorker/RequestHandling.lean
index 57418b4fa1..424b475ad2 100644
--- a/src/Lean/Server/FileWorker/RequestHandling.lean
+++ b/src/Lean/Server/FileWorker/RequestHandling.lean
@@ -46,10 +46,11 @@ def handleCompletion (p : CompletionParams)
   mapTask (findCompletionCmdDataAtPos doc pos) fun cmdData? => do
     let some (cmdStx, infoTree) := cmdData?
       -- work around https://github.com/microsoft/vscode/issues/155738
-      | return { items := #[{label := "-"}], isIncomplete := true }
-    if let some r ← Completion.find? p doc.meta.text pos cmdStx infoTree caps then
-      return r
-    return { items := #[ ], isIncomplete := true }
+      | return {
+        items := #[{label := "-", data? := toJson { params := p : Lean.Lsp.CompletionItemData }}],
+        isIncomplete := true
+      }
+    Completion.find? p doc.meta.text pos cmdStx infoTree caps
 
 /--
 Handles `completionItem/resolve` requests that are sent by the client after the user selects
@@ -62,7 +63,7 @@ def handleCompletionItemResolve (item : CompletionItem)
     : RequestM (RequestTask CompletionItem) := do
   let doc ← readDoc
   let text := doc.meta.text
-  let some (data : CompletionItemDataWithId) := item.data?.bind fun data => (fromJson? data).toOption
+  let some (data : ResolvableCompletionItemData) := item.data?.bind fun data => (fromJson? data).toOption
     | return .pure item
   let some id := data.id?
     | return .pure item
@@ -70,7 +71,7 @@ def handleCompletionItemResolve (item : CompletionItem)
   mapTask (findCompletionCmdDataAtPos doc pos) fun cmdData? => do
     let some (cmdStx, infoTree) := cmdData?
       | return item
-    Completion.resolveCompletionItem? text pos cmdStx infoTree item id
+    Completion.resolveCompletionItem? text pos cmdStx infoTree item id data.cPos
 
 open Elab in
 def handleHover (p : HoverParams)
diff --git a/src/Lean/Server/InfoUtils.lean b/src/Lean/Server/InfoUtils.lean
index 2f3fba3969..b642d73849 100644
--- a/src/Lean/Server/InfoUtils.lean
+++ b/src/Lean/Server/InfoUtils.lean
@@ -136,6 +136,7 @@ def InfoTree.getCompletionInfos (infoTree : InfoTree) : Array (ContextInfo × Co
 def Info.stx : Info → Syntax
   | ofTacticInfo i         => i.stx
   | ofTermInfo i           => i.stx
+  | ofPartialTermInfo i    => i.stx
   | ofCommandInfo i        => i.stx
   | ofMacroExpansionInfo i => i.stx
   | ofOptionInfo i         => i.stx
@@ -146,6 +147,7 @@ def Info.stx : Info → Syntax
   | ofFVarAliasInfo _      => .missing
   | ofFieldRedeclInfo i    => i.stx
   | ofOmissionInfo i       => i.stx
+  | ofChoiceInfo i         => i.stx
 
 def Info.lctx : Info → LocalContext
   | .ofTermInfo i           => i.lctx
diff --git a/tests/lean/1018unknowMVarIssue.lean.expected.out b/tests/lean/1018unknowMVarIssue.lean.expected.out
index 63c1b033f9..5029613281 100644
--- a/tests/lean/1018unknowMVarIssue.lean.expected.out
+++ b/tests/lean/1018unknowMVarIssue.lean.expected.out
@@ -30,6 +30,7 @@ a : α
       • a (isBinder := true) : α @ ⟨7, 9⟩-⟨7, 10⟩
       • x (isBinder := true) : Fam2 α β @ ⟨7, 17⟩-⟨7, 18⟩
       • CustomInfo(Lean.Elab.Term.BodyInfo)
+        • Partial term @ ⟨8, 2⟩-⟨10, 19⟩ @ Lean.Elab.Term.Quotation.elabMatchSyntax
         • match α, β, x, a with
           | α_1, .(α_1), Fam2.any, a => ?m x α_1 a
           | .(Nat), .(Nat), Fam2.nat n, a => n : β @ ⟨8, 2⟩-⟨10, 19⟩ @ Lean.Elab.Term.elabMatch
diff --git a/tests/lean/instance1.lean.expected.out b/tests/lean/instance1.lean.expected.out
index f09ccac7f6..174df89903 100644
--- a/tests/lean/instance1.lean.expected.out
+++ b/tests/lean/instance1.lean.expected.out
@@ -1 +1 @@
-instance1.lean:6:24-6:29: error: fields missing: 'pure', 'bind'
+instance1.lean:6:24-10:0: error: fields missing: 'pure', 'bind'
diff --git a/tests/lean/interactive/1265.lean.expected.out b/tests/lean/interactive/1265.lean.expected.out
index abe2bf402d..0f91b29507 100644
--- a/tests/lean/interactive/1265.lean.expected.out
+++ b/tests/lean/interactive/1265.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.expandInterpolatedStr"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.expandInterpolatedStr"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "getChar",
    "kind": 3,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getChar"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getChar"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "getDocString",
    "kind": 3,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getDocString"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getDocString"}},
+    "cPos": 1}},
   {"sortText": "3",
    "label": "getHygieneInfo",
    "kind": 3,
@@ -32,7 +35,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getHygieneInfo"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getHygieneInfo"}},
+    "cPos": 1}},
   {"sortText": "4",
    "label": "getId",
    "kind": 3,
@@ -40,7 +44,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getId"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getId"}},
+    "cPos": 1}},
   {"sortText": "5",
    "label": "getName",
    "kind": 3,
@@ -48,7 +53,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getName"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getName"}},
+    "cPos": 1}},
   {"sortText": "6",
    "label": "getNat",
    "kind": 3,
@@ -56,7 +62,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getNat"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getNat"}},
+    "cPos": 1}},
   {"sortText": "7",
    "label": "getScientific",
    "kind": 3,
@@ -64,7 +71,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getScientific"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getScientific"}},
+    "cPos": 1}},
   {"sortText": "8",
    "label": "getString",
    "kind": 3,
@@ -72,7 +80,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.getString"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getString"}},
+    "cPos": 1}},
   {"sortText": "9",
    "label": "raw",
    "kind": 5,
@@ -82,7 +91,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 0, "character": 51}},
-    "id": {"const": {"declName": "Lean.TSyntax.raw"}}}}],
+    "id": {"const": {"declName": "Lean.TSyntax.raw"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///1265.lean"},
  "position": {"line": 2, "character": 53}}
@@ -94,7 +104,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.expandInterpolatedStr"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.expandInterpolatedStr"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "getChar",
    "kind": 3,
@@ -102,7 +113,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getChar"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getChar"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "getDocString",
    "kind": 3,
@@ -110,7 +122,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getDocString"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getDocString"}},
+    "cPos": 1}},
   {"sortText": "3",
    "label": "getHygieneInfo",
    "kind": 3,
@@ -118,7 +131,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getHygieneInfo"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getHygieneInfo"}},
+    "cPos": 1}},
   {"sortText": "4",
    "label": "getId",
    "kind": 3,
@@ -126,7 +140,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getId"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getId"}},
+    "cPos": 1}},
   {"sortText": "5",
    "label": "getName",
    "kind": 3,
@@ -134,7 +149,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getName"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getName"}},
+    "cPos": 1}},
   {"sortText": "6",
    "label": "getNat",
    "kind": 3,
@@ -142,7 +158,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getNat"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getNat"}},
+    "cPos": 1}},
   {"sortText": "7",
    "label": "getScientific",
    "kind": 3,
@@ -150,7 +167,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getScientific"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getScientific"}},
+    "cPos": 1}},
   {"sortText": "8",
    "label": "getString",
    "kind": 3,
@@ -158,7 +176,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.getString"}}}},
+    "id": {"const": {"declName": "Lean.TSyntax.getString"}},
+    "cPos": 1}},
   {"sortText": "9",
    "label": "raw",
    "kind": 5,
@@ -168,5 +187,6 @@
    {"params":
     {"textDocument": {"uri": "file:///1265.lean"},
      "position": {"line": 2, "character": 53}},
-    "id": {"const": {"declName": "Lean.TSyntax.raw"}}}}],
+    "id": {"const": {"declName": "Lean.TSyntax.raw"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/1659.lean.expected.out b/tests/lean/interactive/1659.lean.expected.out
index dc26f41f1c..e98343098f 100644
--- a/tests/lean/interactive/1659.lean.expected.out
+++ b/tests/lean/interactive/1659.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 9, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Elab.Term.elabTermEnsuringType",
    "kind": 21,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 9, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}}}}],
+    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///1659.lean"},
  "position": {"line": 15, "character": 23}}
@@ -28,7 +30,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 15, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Term.elabTermEnsuringType",
    "kind": 21,
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 15, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}}}}],
+    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///1659.lean"},
  "position": {"line": 21, "character": 23}}
@@ -48,7 +52,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 21, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Elab.Tactic.elabTermEnsuringType",
    "kind": 21,
@@ -56,7 +61,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 21, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}}}}],
+    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///1659.lean"},
  "position": {"line": 27, "character": 23}}
@@ -68,7 +74,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 27, "character": 23}},
-    "id": {"const": {"declName": "elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Elab.Tactic.elabTermEnsuringType",
    "kind": 21,
@@ -76,7 +83,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 27, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Elab.Term.elabTermEnsuringType",
    "kind": 21,
@@ -84,7 +92,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 27, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}}}}],
+    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///1659.lean"},
  "position": {"line": 33, "character": 23}}
@@ -96,7 +105,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 33, "character": 23}},
-    "id": {"const": {"declName": "elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Elab.elabTermEnsuringType",
    "kind": 21,
@@ -104,7 +114,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 33, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Elab.Tactic.elabTermEnsuringType",
    "kind": 21,
@@ -112,7 +123,8 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 33, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}}}},
+    "id": {"const": {"declName": "Lean.Elab.Tactic.elabTermEnsuringType"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Elab.Term.elabTermEnsuringType",
    "kind": 21,
@@ -120,5 +132,6 @@
    {"params":
     {"textDocument": {"uri": "file:///1659.lean"},
      "position": {"line": 33, "character": 23}},
-    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}}}}],
+    "id": {"const": {"declName": "Lean.Elab.Term.elabTermEnsuringType"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/4880.lean.expected.out b/tests/lean/interactive/4880.lean.expected.out
index 88d320c447..de96f1cf48 100644
--- a/tests/lean/interactive/4880.lean.expected.out
+++ b/tests/lean/interactive/4880.lean.expected.out
@@ -5,22 +5,22 @@
    "severity": 1,
    "range":
    {"start": {"line": 16, "character": 12},
-    "end": {"line": 16, "character": 17}},
+    "end": {"line": 17, "character": 0}},
    "message":
    "could not synthesize default value for field 'h1' of 'B' using tactics",
    "fullRange":
    {"start": {"line": 16, "character": 12},
-    "end": {"line": 16, "character": 17}}},
+    "end": {"line": 20, "character": 0}}},
   {"source": "Lean 4",
    "severity": 1,
    "range":
    {"start": {"line": 16, "character": 12},
-    "end": {"line": 16, "character": 17}},
+    "end": {"line": 17, "character": 0}},
    "message":
    "failed to synthesize\n  A\nAdditional diagnostic information may be available using the `set_option diagnostics true` command.",
    "fullRange":
    {"start": {"line": 16, "character": 12},
-    "end": {"line": 16, "character": 17}}},
+    "end": {"line": 20, "character": 0}}},
   {"source": "Lean 4",
    "severity": 1,
    "range":
@@ -45,8 +45,8 @@
    "severity": 1,
    "range":
    {"start": {"line": 34, "character": 13},
-    "end": {"line": 34, "character": 18}},
+    "end": {"line": 35, "character": 0}},
    "message": "unsolved goals\n⊢ A",
    "fullRange":
    {"start": {"line": 34, "character": 13},
-    "end": {"line": 34, "character": 18}}}]}
+    "end": {"line": 36, "character": 0}}}]}
diff --git a/tests/lean/interactive/533.lean.expected.out b/tests/lean/interactive/533.lean.expected.out
index 72e7be4fb9..db615b1739 100644
--- a/tests/lean/interactive/533.lean.expected.out
+++ b/tests/lean/interactive/533.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///533.lean"},
      "position": {"line": 4, "character": 10}},
-    "id": {"fvar": {"id": "_uniq.6"}}}},
+    "id": {"fvar": {"id": "_uniq.6"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Foo",
    "kind": 6,
@@ -16,5 +17,6 @@
    {"params":
     {"textDocument": {"uri": "file:///533.lean"},
      "position": {"line": 4, "character": 10}},
-    "id": {"fvar": {"id": "_uniq.2"}}}}],
+    "id": {"fvar": {"id": "_uniq.2"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/863.lean.expected.out b/tests/lean/interactive/863.lean.expected.out
index 6843b01e86..7ec3d09d6a 100644
--- a/tests/lean/interactive/863.lean.expected.out
+++ b/tests/lean/interactive/863.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///863.lean"},
      "position": {"line": 9, "character": 12}},
-    "id": {"const": {"declName": "Lean.MonadRef.getRef"}}}},
+    "id": {"const": {"declName": "Lean.MonadRef.getRef"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "MonadRef.getRef",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///863.lean"},
      "position": {"line": 9, "character": 12}},
-    "id": {"const": {"declName": "Lean.MonadRef.getRef"}}}}],
+    "id": {"const": {"declName": "Lean.MonadRef.getRef"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///863.lean"},
  "position": {"line": 13, "character": 12}}
@@ -28,7 +30,8 @@
    {"params":
     {"textDocument": {"uri": "file:///863.lean"},
      "position": {"line": 13, "character": 12}},
-    "id": {"const": {"declName": "Lean.MonadRef.getRef"}}}},
+    "id": {"const": {"declName": "Lean.MonadRef.getRef"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "MonadRef.getRef",
    "kind": 5,
@@ -36,5 +39,6 @@
    {"params":
     {"textDocument": {"uri": "file:///863.lean"},
      "position": {"line": 13, "character": 12}},
-    "id": {"const": {"declName": "Lean.MonadRef.getRef"}}}}],
+    "id": {"const": {"declName": "Lean.MonadRef.getRef"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/compHeader.lean.expected.out b/tests/lean/interactive/compHeader.lean.expected.out
index d4ca54fdbf..e2418fe0a4 100644
--- a/tests/lean/interactive/compHeader.lean.expected.out
+++ b/tests/lean/interactive/compHeader.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///compHeader.lean"},
      "position": {"line": 2, "character": 22}},
-    "id": {"fvar": {"id": "_uniq.7"}}}},
+    "id": {"fvar": {"id": "_uniq.7"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "veryLongNameForCompletion",
    "kind": 21,
@@ -16,5 +17,6 @@
    {"params":
     {"textDocument": {"uri": "file:///compHeader.lean"},
      "position": {"line": 2, "character": 22}},
-    "id": {"const": {"declName": "veryLongNameForCompletion"}}}}],
+    "id": {"const": {"declName": "veryLongNameForCompletion"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/compNamespace.lean.expected.out b/tests/lean/interactive/compNamespace.lean.expected.out
index ba2b53585e..46bce389fd 100644
--- a/tests/lean/interactive/compNamespace.lean.expected.out
+++ b/tests/lean/interactive/compNamespace.lean.expected.out
@@ -8,7 +8,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///compNamespace.lean"},
-     "position": {"line": 5, "character": 12}}}}],
+     "position": {"line": 5, "character": 12}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///compNamespace.lean"},
  "position": {"line": 9, "character": 12}}
@@ -20,7 +21,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///compNamespace.lean"},
-     "position": {"line": 9, "character": 12}}}}],
+     "position": {"line": 9, "character": 12}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///compNamespace.lean"},
  "position": {"line": 13, "character": 11}}
@@ -32,7 +34,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///compNamespace.lean"},
-     "position": {"line": 13, "character": 11}}}}],
+     "position": {"line": 13, "character": 11}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///compNamespace.lean"},
  "position": {"line": 16, "character": 16}}
@@ -44,7 +47,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///compNamespace.lean"},
-     "position": {"line": 16, "character": 16}}}}],
+     "position": {"line": 16, "character": 16}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///compNamespace.lean"},
  "position": {"line": 20, "character": 12}}
@@ -56,5 +60,6 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///compNamespace.lean"},
-     "position": {"line": 20, "character": 12}}}}],
+     "position": {"line": 20, "character": 12}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion.lean.expected.out b/tests/lean/interactive/completion.lean.expected.out
index 09db651354..70876007ea 100644
--- a/tests/lean/interactive/completion.lean.expected.out
+++ b/tests/lean/interactive/completion.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion.lean"},
      "position": {"line": 3, "character": 22}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion.lean"},
  "position": {"line": 5, "character": 23}}
@@ -20,7 +21,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion.lean"},
      "position": {"line": 5, "character": 23}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion.lean"},
  "position": {"line": 7, "character": 28}}
@@ -32,7 +34,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion.lean"},
      "position": {"line": 7, "character": 28}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion.lean"},
  "position": {"line": 9, "character": 29}}
@@ -44,5 +47,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion.lean"},
      "position": {"line": 9, "character": 29}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion2.lean.expected.out b/tests/lean/interactive/completion2.lean.expected.out
index 3f9aafd094..8788a4bbf7 100644
--- a/tests/lean/interactive/completion2.lean.expected.out
+++ b/tests/lean/interactive/completion2.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 19, "character": 10}},
-    "id": {"const": {"declName": "Foo.Bla.ax1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ax1"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "ex1",
    "kind": 23,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 19, "character": 10}},
-    "id": {"const": {"declName": "Foo.Bla.ex1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex1"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "ex2",
    "kind": 23,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 19, "character": 10}},
-    "id": {"const": {"declName": "Foo.Bla.ex2"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex2"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "ex3",
    "kind": 23,
@@ -32,7 +35,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 19, "character": 10}},
-    "id": {"const": {"declName": "Foo.Bla.ex3"}}}}],
+    "id": {"const": {"declName": "Foo.Bla.ex3"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion2.lean"},
  "position": {"line": 25, "character": 6}}
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 25, "character": 6}},
-    "id": {"const": {"declName": "Foo.Bla.ax1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ax1"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "ex1",
    "kind": 23,
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 25, "character": 6}},
-    "id": {"const": {"declName": "Foo.Bla.ex1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex1"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "ex2",
    "kind": 23,
@@ -60,7 +66,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 25, "character": 6}},
-    "id": {"const": {"declName": "Foo.Bla.ex2"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex2"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "ex3",
    "kind": 23,
@@ -68,7 +75,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 25, "character": 6}},
-    "id": {"const": {"declName": "Foo.Bla.ex3"}}}}],
+    "id": {"const": {"declName": "Foo.Bla.ex3"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion2.lean"},
  "position": {"line": 30, "character": 21}}
@@ -80,7 +88,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 30, "character": 21}},
-    "id": {"const": {"declName": "Foo.Bla.ax1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ax1"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "ex1",
    "kind": 23,
@@ -88,7 +97,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 30, "character": 21}},
-    "id": {"const": {"declName": "Foo.Bla.ex1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex1"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "ex2",
    "kind": 23,
@@ -96,7 +106,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 30, "character": 21}},
-    "id": {"const": {"declName": "Foo.Bla.ex2"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex2"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "ex3",
    "kind": 23,
@@ -104,7 +115,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 30, "character": 21}},
-    "id": {"const": {"declName": "Foo.Bla.ex3"}}}}],
+    "id": {"const": {"declName": "Foo.Bla.ex3"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion2.lean"},
  "position": {"line": 37, "character": 22}}
@@ -116,7 +128,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 37, "character": 22}},
-    "id": {"const": {"declName": "Foo.Bla.ex1"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex1"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "ex2",
    "kind": 23,
@@ -124,7 +137,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 37, "character": 22}},
-    "id": {"const": {"declName": "Foo.Bla.ex2"}}}},
+    "id": {"const": {"declName": "Foo.Bla.ex2"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "ex3",
    "kind": 23,
@@ -132,5 +146,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion2.lean"},
      "position": {"line": 37, "character": 22}},
-    "id": {"const": {"declName": "Foo.Bla.ex3"}}}}],
+    "id": {"const": {"declName": "Foo.Bla.ex3"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion3.lean.expected.out b/tests/lean/interactive/completion3.lean.expected.out
index e3f61c586b..bca23dfea8 100644
--- a/tests/lean/interactive/completion3.lean.expected.out
+++ b/tests/lean/interactive/completion3.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 7, "character": 9}},
-    "id": {"const": {"declName": "S.b"}}}},
+    "id": {"const": {"declName": "S.b"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "x",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 7, "character": 9}},
-    "id": {"const": {"declName": "S.x"}}}},
+    "id": {"const": {"declName": "S.x"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "y",
    "kind": 5,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 7, "character": 9}},
-    "id": {"const": {"declName": "S.y"}}}}],
+    "id": {"const": {"declName": "S.y"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion3.lean"},
  "position": {"line": 12, "character": 5}}
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 12, "character": 5}},
-    "id": {"const": {"declName": "S.b"}}}},
+    "id": {"const": {"declName": "S.b"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "x",
    "kind": 5,
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 12, "character": 5}},
-    "id": {"const": {"declName": "S.x"}}}},
+    "id": {"const": {"declName": "S.x"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "y",
    "kind": 5,
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 12, "character": 5}},
-    "id": {"const": {"declName": "S.y"}}}}],
+    "id": {"const": {"declName": "S.y"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion3.lean"},
  "position": {"line": 16, "character": 5}}
@@ -64,7 +70,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 16, "character": 5}},
-    "id": {"const": {"declName": "S.b"}}}},
+    "id": {"const": {"declName": "S.b"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "x",
    "kind": 5,
@@ -72,7 +79,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 16, "character": 5}},
-    "id": {"const": {"declName": "S.x"}}}},
+    "id": {"const": {"declName": "S.x"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "y",
    "kind": 5,
@@ -80,7 +88,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 16, "character": 5}},
-    "id": {"const": {"declName": "S.y"}}}}],
+    "id": {"const": {"declName": "S.y"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion3.lean"},
  "position": {"line": 20, "character": 5}}
@@ -92,7 +101,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 20, "character": 5}},
-    "id": {"const": {"declName": "S.b"}}}},
+    "id": {"const": {"declName": "S.b"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "x",
    "kind": 5,
@@ -100,7 +110,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 20, "character": 5}},
-    "id": {"const": {"declName": "S.x"}}}},
+    "id": {"const": {"declName": "S.x"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "y",
    "kind": 5,
@@ -108,5 +119,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion3.lean"},
      "position": {"line": 20, "character": 5}},
-    "id": {"const": {"declName": "S.y"}}}}],
+    "id": {"const": {"declName": "S.y"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion4.lean.expected.out b/tests/lean/interactive/completion4.lean.expected.out
index f135609126..822a7de2f4 100644
--- a/tests/lean/interactive/completion4.lean.expected.out
+++ b/tests/lean/interactive/completion4.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 7, "character": 4}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "fn2",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 7, "character": 4}},
-    "id": {"const": {"declName": "S.fn2"}}}},
+    "id": {"const": {"declName": "S.fn2"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "pred",
    "kind": 5,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 7, "character": 4}},
-    "id": {"const": {"declName": "S.pred"}}}}],
+    "id": {"const": {"declName": "S.pred"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion4.lean"},
  "position": {"line": 11, "character": 10}}
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 11, "character": 10}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "fn2",
    "kind": 5,
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 11, "character": 10}},
-    "id": {"const": {"declName": "S.fn2"}}}},
+    "id": {"const": {"declName": "S.fn2"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "pred",
    "kind": 5,
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 11, "character": 10}},
-    "id": {"const": {"declName": "S.pred"}}}}],
+    "id": {"const": {"declName": "S.pred"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion4.lean"},
  "position": {"line": 16, "character": 11}}
@@ -64,7 +70,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 16, "character": 11}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "fn2",
    "kind": 5,
@@ -72,7 +79,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 16, "character": 11}},
-    "id": {"const": {"declName": "S.fn2"}}}},
+    "id": {"const": {"declName": "S.fn2"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "pred",
    "kind": 5,
@@ -80,7 +88,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 16, "character": 11}},
-    "id": {"const": {"declName": "S.pred"}}}}],
+    "id": {"const": {"declName": "S.pred"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion4.lean"},
  "position": {"line": 20, "character": 21}}
@@ -92,7 +101,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 20, "character": 21}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "fn2",
    "kind": 5,
@@ -100,7 +110,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 20, "character": 21}},
-    "id": {"const": {"declName": "S.fn2"}}}},
+    "id": {"const": {"declName": "S.fn2"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "pred",
    "kind": 5,
@@ -108,5 +119,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion4.lean"},
      "position": {"line": 20, "character": 21}},
-    "id": {"const": {"declName": "S.pred"}}}}],
+    "id": {"const": {"declName": "S.pred"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion5.lean.expected.out b/tests/lean/interactive/completion5.lean.expected.out
index 152236a17a..91ea7851e6 100644
--- a/tests/lean/interactive/completion5.lean.expected.out
+++ b/tests/lean/interactive/completion5.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion5.lean"},
      "position": {"line": 9, "character": 15}},
-    "id": {"const": {"declName": "C.b1"}}}},
+    "id": {"const": {"declName": "C.b1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "f1",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion5.lean"},
      "position": {"line": 9, "character": 15}},
-    "id": {"const": {"declName": "C.f1"}}}},
+    "id": {"const": {"declName": "C.f1"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "f2",
    "kind": 5,
@@ -24,5 +26,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion5.lean"},
      "position": {"line": 9, "character": 15}},
-    "id": {"const": {"declName": "C.f2"}}}}],
+    "id": {"const": {"declName": "C.f2"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion6.lean.expected.out b/tests/lean/interactive/completion6.lean.expected.out
index f6cb7e7c4f..17fdb83289 100644
--- a/tests/lean/interactive/completion6.lean.expected.out
+++ b/tests/lean/interactive/completion6.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "C.b1"}}}},
+    "id": {"const": {"declName": "C.b1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "f1",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "C.f1"}}}},
+    "id": {"const": {"declName": "C.f1"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "f2",
    "kind": 5,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "C.f2"}}}},
+    "id": {"const": {"declName": "C.f2"}},
+    "cPos": 1}},
   {"sortText": "3",
    "label": "f3",
    "kind": 5,
@@ -32,7 +35,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "D.f3"}}}},
+    "id": {"const": {"declName": "D.f3"}},
+    "cPos": 1}},
   {"sortText": "4",
    "label": "toC",
    "kind": 5,
@@ -40,7 +44,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "D.toC"}}}}],
+    "id": {"const": {"declName": "D.toC"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion6.lean"},
  "position": {"line": 21, "character": 4}}
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "C.b1"}}}},
+    "id": {"const": {"declName": "C.b1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "doubleF1",
    "kind": 3,
@@ -60,7 +66,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "E.doubleF1"}}}},
+    "id": {"const": {"declName": "E.doubleF1"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "f1",
    "kind": 5,
@@ -68,7 +75,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "C.f1"}}}},
+    "id": {"const": {"declName": "C.f1"}},
+    "cPos": 1}},
   {"sortText": "3",
    "label": "f2",
    "kind": 5,
@@ -76,7 +84,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "C.f2"}}}},
+    "id": {"const": {"declName": "C.f2"}},
+    "cPos": 1}},
   {"sortText": "4",
    "label": "f3",
    "kind": 5,
@@ -84,7 +93,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "D.f3"}}}},
+    "id": {"const": {"declName": "D.f3"}},
+    "cPos": 1}},
   {"sortText": "5",
    "label": "toC",
    "kind": 5,
@@ -92,5 +102,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion6.lean"},
      "position": {"line": 21, "character": 4}},
-    "id": {"const": {"declName": "D.toC"}}}}],
+    "id": {"const": {"declName": "D.toC"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completion7.lean.expected.out b/tests/lean/interactive/completion7.lean.expected.out
index 8b6d13ec7f..0538b9a0b4 100644
--- a/tests/lean/interactive/completion7.lean.expected.out
+++ b/tests/lean/interactive/completion7.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion7.lean"},
      "position": {"line": 6, "character": 10}},
-    "id": {"const": {"declName": "And"}}}}],
+    "id": {"const": {"declName": "And"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completion7.lean"},
  "position": {"line": 8, "character": 11}}
@@ -20,7 +21,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion7.lean"},
      "position": {"line": 8, "character": 11}},
-    "id": {"const": {"declName": "And.left"}}}},
+    "id": {"const": {"declName": "And.left"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "mk",
    "kind": 4,
@@ -28,7 +30,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completion7.lean"},
      "position": {"line": 8, "character": 11}},
-    "id": {"const": {"declName": "And.mk"}}}},
+    "id": {"const": {"declName": "And.mk"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "right",
    "kind": 5,
@@ -36,5 +39,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completion7.lean"},
      "position": {"line": 8, "character": 11}},
-    "id": {"const": {"declName": "And.right"}}}}],
+    "id": {"const": {"declName": "And.right"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionAtPrint.lean.expected.out b/tests/lean/interactive/completionAtPrint.lean.expected.out
index bb2fc2b59e..61ce71e1ed 100644
--- a/tests/lean/interactive/completionAtPrint.lean.expected.out
+++ b/tests/lean/interactive/completionAtPrint.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionAtPrint.lean"},
      "position": {"line": 2, "character": 25}},
-    "id": {"const": {"declName": "Lean.Environment.find?"}}}},
+    "id": {"const": {"declName": "Lean.Environment.find?"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "freeRegions",
    "kind": 3,
@@ -20,5 +21,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionAtPrint.lean"},
      "position": {"line": 2, "character": 25}},
-    "id": {"const": {"declName": "Lean.Environment.freeRegions"}}}}],
+    "id": {"const": {"declName": "Lean.Environment.freeRegions"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionCheck.lean.expected.out b/tests/lean/interactive/completionCheck.lean.expected.out
index af03d40b5f..8c799d1af3 100644
--- a/tests/lean/interactive/completionCheck.lean.expected.out
+++ b/tests/lean/interactive/completionCheck.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionCheck.lean"},
      "position": {"line": 6, "character": 33}},
-    "id": {"const": {"declName": "AVerySpecificStructureName"}}}},
+    "id": {"const": {"declName": "AVerySpecificStructureName"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "AVerySpecificStructureName2",
    "kind": 22,
@@ -16,5 +17,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionCheck.lean"},
      "position": {"line": 6, "character": 33}},
-    "id": {"const": {"declName": "AVerySpecificStructureName2"}}}}],
+    "id": {"const": {"declName": "AVerySpecificStructureName2"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionDeprecation.lean.expected.out b/tests/lean/interactive/completionDeprecation.lean.expected.out
index 9c36ff48db..1550a8f6ea 100644
--- a/tests/lean/interactive/completionDeprecation.lean.expected.out
+++ b/tests/lean/interactive/completionDeprecation.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo1"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo1"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "foo2",
    "kind": 3,
@@ -17,7 +18,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo2"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo2"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "2",
    "label": "foo3",
@@ -28,7 +30,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo3"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo3"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "3",
    "label": "foo4",
@@ -40,7 +43,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo4"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo4"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "4",
    "label": "foo5",
@@ -53,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo5"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo5"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "5",
    "label": "foo6",
@@ -66,7 +71,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo6"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo6"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "6",
    "label": "foo7",
@@ -79,7 +85,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo7"}}}},
+    "id": {"const": {"declName": "SomeStructure.foo7"}},
+    "cPos": 0}},
   {"tags": [1],
    "sortText": "7",
    "label": "foo8",
@@ -92,5 +99,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDeprecation.lean"},
      "position": {"line": 25, "character": 28}},
-    "id": {"const": {"declName": "SomeStructure.foo8"}}}}],
+    "id": {"const": {"declName": "SomeStructure.foo8"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionDocString.lean.expected.out b/tests/lean/interactive/completionDocString.lean.expected.out
index 87577cd094..90ef754cdc 100644
--- a/tests/lean/interactive/completionDocString.lean.expected.out
+++ b/tests/lean/interactive/completionDocString.lean.expected.out
@@ -10,7 +10,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDocString.lean"},
      "position": {"line": 0, "character": 20}},
-    "id": {"const": {"declName": "Array.insertAt"}}}},
+    "id": {"const": {"declName": "Array.insertAt"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "insertAt!",
    "kind": 3,
@@ -22,5 +23,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionDocString.lean"},
      "position": {"line": 0, "character": 20}},
-    "id": {"const": {"declName": "Array.insertAt!"}}}}],
+    "id": {"const": {"declName": "Array.insertAt!"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionEOF.lean.expected.out b/tests/lean/interactive/completionEOF.lean.expected.out
index bffabbbf79..d03cf05aa2 100644
--- a/tests/lean/interactive/completionEOF.lean.expected.out
+++ b/tests/lean/interactive/completionEOF.lean.expected.out
@@ -8,5 +8,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionEOF.lean"},
      "position": {"line": 8, "character": 9}},
-    "id": {"const": {"declName": "And"}}}}],
+    "id": {"const": {"declName": "And"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionFallback.lean.expected.out b/tests/lean/interactive/completionFallback.lean.expected.out
index 0d524243dc..a8841a0ad3 100644
--- a/tests/lean/interactive/completionFallback.lean.expected.out
+++ b/tests/lean/interactive/completionFallback.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.down"}}}},
+    "id": {"const": {"declName": "Direction.down"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "left",
    "kind": 4,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.left"}}}},
+    "id": {"const": {"declName": "Direction.left"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "noConfusionType",
    "kind": 3,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.noConfusionType"}}}},
+    "id": {"const": {"declName": "Direction.noConfusionType"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "right",
    "kind": 4,
@@ -32,7 +35,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.right"}}}},
+    "id": {"const": {"declName": "Direction.right"}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "toCtorIdx",
    "kind": 3,
@@ -40,7 +44,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.toCtorIdx"}}}},
+    "id": {"const": {"declName": "Direction.toCtorIdx"}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "up",
    "kind": 4,
@@ -48,7 +53,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 14, "character": 14}},
-    "id": {"const": {"declName": "Direction.up"}}}}],
+    "id": {"const": {"declName": "Direction.up"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionFallback.lean"},
  "position": {"line": 28, "character": 30}}
@@ -60,7 +66,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 28, "character": 30}},
-    "id": {"const": {"declName": "CustomAnd.ha"}}}},
+    "id": {"const": {"declName": "CustomAnd.ha"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "hb",
    "kind": 23,
@@ -68,7 +75,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 28, "character": 30}},
-    "id": {"const": {"declName": "CustomAnd.hb"}}}},
+    "id": {"const": {"declName": "CustomAnd.hb"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "mk",
    "kind": 4,
@@ -76,5 +84,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFallback.lean"},
      "position": {"line": 28, "character": 30}},
-    "id": {"const": {"declName": "CustomAnd.mk"}}}}],
+    "id": {"const": {"declName": "CustomAnd.mk"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionFromExpectedType.lean.expected.out b/tests/lean/interactive/completionFromExpectedType.lean.expected.out
index 938821b1d3..14df3b78f6 100644
--- a/tests/lean/interactive/completionFromExpectedType.lean.expected.out
+++ b/tests/lean/interactive/completionFromExpectedType.lean.expected.out
@@ -8,5 +8,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionFromExpectedType.lean"},
      "position": {"line": 3, "character": 18}},
-    "id": {"const": {"declName": "Foo.mk"}}}}],
+    "id": {"const": {"declName": "Foo.mk"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionIStr.lean.expected.out b/tests/lean/interactive/completionIStr.lean.expected.out
index 2da7e5d5b6..7869a2c34d 100644
--- a/tests/lean/interactive/completionIStr.lean.expected.out
+++ b/tests/lean/interactive/completionIStr.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionIStr.lean"},
      "position": {"line": 5, "character": 34}},
-    "id": {"const": {"declName": "C.b1"}}}},
+    "id": {"const": {"declName": "C.b1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "f1",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionIStr.lean"},
      "position": {"line": 5, "character": 34}},
-    "id": {"const": {"declName": "C.f1"}}}},
+    "id": {"const": {"declName": "C.f1"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "f2",
    "kind": 5,
@@ -24,5 +26,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionIStr.lean"},
      "position": {"line": 5, "character": 34}},
-    "id": {"const": {"declName": "C.f2"}}}}],
+    "id": {"const": {"declName": "C.f2"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionOpenNamespaces.lean.expected.out b/tests/lean/interactive/completionOpenNamespaces.lean.expected.out
index 468aaf3ced..7fdbd1f930 100644
--- a/tests/lean/interactive/completionOpenNamespaces.lean.expected.out
+++ b/tests/lean/interactive/completionOpenNamespaces.lean.expected.out
@@ -10,6 +10,6 @@
      "position": {"line": 4, "character": 68}},
     "id":
     {"const":
-     {"declName":
-      "A.B1.verySpecificDefinitionNameOfCompletionOpenNamespaces"}}}}],
+     {"declName": "A.B1.verySpecificDefinitionNameOfCompletionOpenNamespaces"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionOption.lean.expected.out b/tests/lean/interactive/completionOption.lean.expected.out
index 31d9a27f4b..ffda8804a4 100644
--- a/tests/lean/interactive/completionOption.lean.expected.out
+++ b/tests/lean/interactive/completionOption.lean.expected.out
@@ -17,7 +17,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -33,7 +34,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -49,7 +51,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -65,7 +68,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -81,7 +85,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -98,7 +103,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}},
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 1, "character": 11},
@@ -115,7 +121,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 1, "character": 17}}}}],
+     "position": {"line": 1, "character": 17}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionOption.lean"},
  "position": {"line": 4, "character": 20}}
@@ -135,7 +142,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 4, "character": 20}}}},
+     "position": {"line": 4, "character": 20}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 4, "character": 11},
@@ -151,7 +159,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 4, "character": 20}}}},
+     "position": {"line": 4, "character": 20}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 4, "character": 11},
@@ -168,7 +177,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 4, "character": 20}}}}],
+     "position": {"line": 4, "character": 20}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionOption.lean"},
  "position": {"line": 7, "character": 23}}
@@ -189,7 +199,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 7, "character": 23}}}},
+     "position": {"line": 7, "character": 23}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 7, "character": 11},
@@ -206,7 +217,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 7, "character": 23}}}},
+     "position": {"line": 7, "character": 23}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 7, "character": 11},
@@ -223,7 +235,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 7, "character": 23}}}},
+     "position": {"line": 7, "character": 23}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 7, "character": 11},
@@ -240,7 +253,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 7, "character": 23}}}}],
+     "position": {"line": 7, "character": 23}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionOption.lean"},
  "position": {"line": 10, "character": 27}}
@@ -261,7 +275,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 10, "character": 27}}}},
+     "position": {"line": 10, "character": 27}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 10, "character": 11},
@@ -278,7 +293,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 10, "character": 27}}}},
+     "position": {"line": 10, "character": 27}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 10, "character": 11},
@@ -295,7 +311,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 10, "character": 27}}}},
+     "position": {"line": 10, "character": 27}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 10, "character": 11},
@@ -312,7 +329,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 10, "character": 27}}}}],
+     "position": {"line": 10, "character": 27}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionOption.lean"},
  "position": {"line": 13, "character": 17}}
@@ -333,7 +351,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -349,7 +368,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -365,7 +385,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -381,7 +402,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -397,7 +419,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -414,7 +437,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}},
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 13, "character": 11},
@@ -431,7 +455,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 13, "character": 17}}}}],
+     "position": {"line": 13, "character": 17}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionOption.lean"},
  "position": {"line": 16, "character": 18}}
@@ -451,7 +476,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}},
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 16, "character": 11},
@@ -467,7 +493,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}},
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 16, "character": 11},
@@ -483,7 +510,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}},
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 16, "character": 11},
@@ -499,7 +527,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}},
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 16, "character": 11},
@@ -516,7 +545,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}},
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}},
   {"textEdit":
    {"replace":
     {"start": {"line": 16, "character": 11},
@@ -533,5 +563,6 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionOption.lean"},
-     "position": {"line": 16, "character": 18}}}}],
+     "position": {"line": 16, "character": 18}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionPrefixIssue.lean.expected.out b/tests/lean/interactive/completionPrefixIssue.lean.expected.out
index b56a773a16..8496fe5d79 100644
--- a/tests/lean/interactive/completionPrefixIssue.lean.expected.out
+++ b/tests/lean/interactive/completionPrefixIssue.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrefixIssue.lean"},
      "position": {"line": 1, "character": 64}},
-    "id": {"fvar": {"id": "_uniq.29"}}}},
+    "id": {"fvar": {"id": "_uniq.29"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "veryLongDefinitionNameVeryLongDefinitionName",
    "kind": 21,
@@ -17,5 +18,6 @@
     {"textDocument": {"uri": "file:///completionPrefixIssue.lean"},
      "position": {"line": 1, "character": 64}},
     "id":
-    {"const": {"declName": "veryLongDefinitionNameVeryLongDefinitionName"}}}}],
+    {"const": {"declName": "veryLongDefinitionNameVeryLongDefinitionName"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionPrivateTypes.lean.expected.out b/tests/lean/interactive/completionPrivateTypes.lean.expected.out
index 1500487155..e364ff1f7a 100644
--- a/tests/lean/interactive/completionPrivateTypes.lean.expected.out
+++ b/tests/lean/interactive/completionPrivateTypes.lean.expected.out
@@ -8,5 +8,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrivateTypes.lean"},
      "position": {"line": 3, "character": 26}},
-    "id": {"const": {"declName": "_private.0.Foo.x"}}}}],
+    "id": {"const": {"declName": "_private.0.Foo.x"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionPrv.lean.expected.out b/tests/lean/interactive/completionPrv.lean.expected.out
index ac03b62acc..319c5da1fd 100644
--- a/tests/lean/interactive/completionPrv.lean.expected.out
+++ b/tests/lean/interactive/completionPrv.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 2, "character": 11}},
-    "id": {"const": {"declName": "_private.0.blaBlaBoo"}}}}],
+    "id": {"const": {"declName": "_private.0.blaBlaBoo"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionPrv.lean"},
  "position": {"line": 9, "character": 11}}
@@ -20,7 +21,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "_private.0.Foo.booBoo"}}}},
+    "id": {"const": {"declName": "_private.0.Foo.booBoo"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "instToBoolBool",
    "kind": 21,
@@ -28,7 +30,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "instToBoolBool"}}}},
+    "id": {"const": {"declName": "instToBoolBool"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "BitVec.getElem_ofBoolListBE",
    "kind": 23,
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.getElem_ofBoolListBE"}}}},
+    "id": {"const": {"declName": "BitVec.getElem_ofBoolListBE"}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "BitVec.getLsbD_ofBoolListBE",
    "kind": 23,
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.getLsbD_ofBoolListBE"}}}},
+    "id": {"const": {"declName": "BitVec.getLsbD_ofBoolListBE"}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "BitVec.getMsbD_ofBoolListBE",
    "kind": 23,
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.getMsbD_ofBoolListBE"}}}},
+    "id": {"const": {"declName": "BitVec.getMsbD_ofBoolListBE"}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "BitVec.ofBool_and_ofBool",
    "kind": 23,
@@ -60,7 +66,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.ofBool_and_ofBool"}}}},
+    "id": {"const": {"declName": "BitVec.ofBool_and_ofBool"}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "BitVec.ofBool_or_ofBool",
    "kind": 23,
@@ -68,7 +75,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.ofBool_or_ofBool"}}}},
+    "id": {"const": {"declName": "BitVec.ofBool_or_ofBool"}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "BitVec.ofBool_xor_ofBool",
    "kind": 23,
@@ -76,7 +84,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.ofBool_xor_ofBool"}}}},
+    "id": {"const": {"declName": "BitVec.ofBool_xor_ofBool"}},
+    "cPos": 0}},
   {"sortText": "8",
    "label": "BitVec.ofBoolListBE",
    "kind": 3,
@@ -87,7 +96,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "BitVec.ofBoolListBE"}}}}],
+    "id": {"const": {"declName": "BitVec.ofBoolListBE"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionPrv.lean"},
  "position": {"line": 21, "character": 5}}
@@ -99,7 +109,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 21, "character": 5}},
-    "id": {"const": {"declName": "S.field1"}}}},
+    "id": {"const": {"declName": "S.field1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "getInc",
    "kind": 3,
@@ -107,7 +118,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 21, "character": 5}},
-    "id": {"const": {"declName": "_private.0.S.getInc"}}}}],
+    "id": {"const": {"declName": "_private.0.S.getInc"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionPrv.lean"},
  "position": {"line": 25, "character": 4}}
@@ -119,7 +131,8 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 25, "character": 4}},
-    "id": {"const": {"declName": "S.field1"}}}},
+    "id": {"const": {"declName": "S.field1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "getInc",
    "kind": 3,
@@ -127,5 +140,6 @@
    {"params":
     {"textDocument": {"uri": "file:///completionPrv.lean"},
      "position": {"line": 25, "character": 4}},
-    "id": {"const": {"declName": "_private.0.S.getInc"}}}}],
+    "id": {"const": {"declName": "_private.0.S.getInc"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/completionStructureInstance.lean b/tests/lean/interactive/completionStructureInstance.lean
new file mode 100644
index 0000000000..ff79f641c6
--- /dev/null
+++ b/tests/lean/interactive/completionStructureInstance.lean
@@ -0,0 +1,96 @@
+import Std.Data.HashSet
+
+structure S' where
+  foo : Nat
+  bar : Nat
+
+structure S extends S' where
+  foobar : Nat
+  barfoo : Nat
+
+example : S where   -- No completions expected
+               --^ textDocument/completion
+
+example : S where    -- All field completions expected
+                --^ textDocument/completion
+
+example : S where
+    -- All field completions expected
+--^ textDocument/completion
+
+example : S where
+  f  -- All field completions matching `f` expected
+ --^ textDocument/completion
+
+example : S where
+  foo  -- All field completions matching `foo` expected
+   --^ textDocument/completion
+
+example : S where
+  foo :=   -- No completions expected
+       --^ textDocument/completion
+
+example : S where
+  foo :=
+      -- No completions expected
+  --^ textDocument/completion
+
+example : S where
+  foo := 1
+      -- All field completions expected
+--^ textDocument/completion
+
+example : S where
+  foo := 1;   -- All field completions expected
+          --^ textDocument/completion
+
+example : S := {  } -- All field completions expected
+               --^ textDocument/completion
+
+example : S := {
+    -- All field completions expected
+--^ textDocument/completion
+}
+
+example : S := {
+  f  -- All field completions matching `f` expected
+ --^ textDocument/completion
+}
+
+example : S := {
+  foo  -- All field completions matching `foo` expected
+   --^ textDocument/completion
+}
+
+example : S := {
+  foo :=
+      -- No completions expected
+  --^ textDocument/completion
+}
+
+example : S := {
+  foo := 1
+    -- All field completions expected
+--^ textDocument/completion
+}
+
+example : S := {
+  foo := 1
+    -- All field completions expected
+--^ textDocument/completion
+}
+
+example : S := { foo := 1,  } -- All field completions expected
+                         --^ textDocument/completion
+
+example (s : S) : S := { s with   } -- All field completions expected
+                              --^ textDocument/completion
+
+example (s : S) : S := { s with   : S } -- All field completions expected
+                              --^ textDocument/completion
+
+example (s : S) : S := { s with f  } -- All field completions matching `f` expected
+                               --^ textDocument/completion
+
+example (aLongUniqueIdentifier : Nat) : Std.HashSet Nat := { aLongUniqueIdentifier } -- Identifier completion matching `aLongUniqueIdentifier`
+                                                                                --^ textDocument/completion
diff --git a/tests/lean/interactive/completionStructureInstance.lean.expected.out b/tests/lean/interactive/completionStructureInstance.lean.expected.out
new file mode 100644
index 0000000000..50f5be772f
--- /dev/null
+++ b/tests/lean/interactive/completionStructureInstance.lean.expected.out
@@ -0,0 +1,612 @@
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 10, "character": 17}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 10, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 10, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 10, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 10, "character": 17}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 13, "character": 18}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 13, "character": 18}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 13, "character": 18}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 13, "character": 18}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 13, "character": 18}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 17, "character": 2}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 17, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 17, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 17, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 17, "character": 2}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 21, "character": 3}}
+{"items":
+ [{"sortText": "0",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 21, "character": 3}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 21, "character": 3}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 25, "character": 5}}
+{"items":
+ [{"sortText": "0",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 25, "character": 5}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 25, "character": 5}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 29, "character": 9}}
+{"items": [], "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 34, "character": 4}}
+{"items": [], "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 39, "character": 2}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 39, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 39, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 39, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 39, "character": 2}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 43, "character": 12}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 43, "character": 12}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 43, "character": 12}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 43, "character": 12}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 43, "character": 12}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 46, "character": 17}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 46, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 46, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 46, "character": 17}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 46, "character": 17}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 50, "character": 2}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 50, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 50, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 50, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 50, "character": 2}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 55, "character": 3}}
+{"items":
+ [{"sortText": "0",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 55, "character": 3}},
+    "cPos": 1}},
+  {"sortText": "1",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 55, "character": 3}},
+    "cPos": 1}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 60, "character": 5}}
+{"items":
+ [{"sortText": "0",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 60, "character": 5}},
+    "cPos": 1}},
+  {"sortText": "1",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 60, "character": 5}},
+    "cPos": 1}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 66, "character": 4}}
+{"items": [], "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 72, "character": 2}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 72, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 72, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 72, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 72, "character": 2}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 78, "character": 2}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 78, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 78, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 78, "character": 2}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 78, "character": 2}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 82, "character": 27}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 82, "character": 27}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 82, "character": 27}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 82, "character": 27}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 82, "character": 27}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 85, "character": 32}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 85, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 85, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 85, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 85, "character": 32}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 88, "character": 32}}
+{"items":
+ [{"sortText": "0",
+   "label": "bar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 88, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "barfoo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 88, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "2",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 88, "character": 32}},
+    "cPos": 0}},
+  {"sortText": "3",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 88, "character": 32}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 91, "character": 33}}
+{"items":
+ [{"sortText": "0",
+   "label": "foo",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 91, "character": 33}},
+    "cPos": 0}},
+  {"sortText": "1",
+   "label": "foobar",
+   "kind": 5,
+   "detail": "field",
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 91, "character": 33}},
+    "cPos": 0}}],
+ "isIncomplete": true}
+{"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+ "position": {"line": 94, "character": 82}}
+{"items":
+ [{"sortText": "0",
+   "label": "aLongUniqueIdentifier",
+   "kind": 6,
+   "data":
+   {"params":
+    {"textDocument": {"uri": "file:///completionStructureInstance.lean"},
+     "position": {"line": 94, "character": 82}},
+    "id": {"fvar": {"id": "_uniq.1024"}},
+    "cPos": 0}}],
+ "isIncomplete": true}
diff --git a/tests/lean/interactive/completionTactics.lean.expected.out b/tests/lean/interactive/completionTactics.lean.expected.out
index f68e2e2f77..dbe081fa57 100644
--- a/tests/lean/interactive/completionTactics.lean.expected.out
+++ b/tests/lean/interactive/completionTactics.lean.expected.out
@@ -11,7 +11,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -22,7 +23,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -33,14 +35,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -51,7 +55,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -62,14 +67,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}},
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -77,7 +84,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 23, "character": 21}}}}],
+     "position": {"line": 23, "character": 21}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 26, "character": 24}}
@@ -89,7 +97,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -100,7 +109,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -111,14 +121,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -129,7 +141,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -140,14 +153,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}},
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -155,7 +170,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 26, "character": 24}}}}],
+     "position": {"line": 26, "character": 24}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 29, "character": 25}}
@@ -170,7 +186,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -181,7 +198,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -192,14 +210,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -210,7 +230,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -221,14 +242,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}},
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -236,7 +259,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 32, "character": 26}}}}],
+     "position": {"line": 32, "character": 26}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 35, "character": 27}}
@@ -248,7 +272,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -259,7 +284,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -270,14 +296,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -288,7 +316,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -299,14 +328,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}},
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -314,7 +345,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 35, "character": 27}}}}],
+     "position": {"line": 35, "character": 27}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 40, "character": 7}}
@@ -326,7 +358,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -337,7 +370,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -348,14 +382,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -366,7 +402,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -377,14 +414,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}},
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -392,7 +431,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 40, "character": 7}}}}],
+     "position": {"line": 40, "character": 7}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 44, "character": 2}}
@@ -404,7 +444,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -415,7 +456,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -426,14 +468,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -444,7 +488,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -455,14 +500,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}},
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -470,7 +517,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 44, "character": 2}}}}],
+     "position": {"line": 44, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 49, "character": 2}}
@@ -482,7 +530,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -493,7 +542,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -504,14 +554,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -522,7 +574,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -533,14 +586,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}},
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -548,7 +603,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 49, "character": 2}}}}],
+     "position": {"line": 49, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 53, "character": 2}}
@@ -560,7 +616,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -571,7 +628,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -582,14 +640,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -600,7 +660,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -611,14 +672,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}},
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -626,7 +689,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 53, "character": 2}}}}],
+     "position": {"line": 53, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 59, "character": 4}}
@@ -638,7 +702,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -649,7 +714,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -660,14 +726,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -678,7 +746,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -689,14 +758,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}},
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -704,7 +775,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 59, "character": 4}}}}],
+     "position": {"line": 59, "character": 4}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 64, "character": 2}}
@@ -716,7 +788,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -727,7 +800,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -738,14 +812,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -756,7 +832,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -767,14 +844,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}},
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -782,7 +861,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 64, "character": 2}}}}],
+     "position": {"line": 64, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 70, "character": 4}}
@@ -794,7 +874,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -805,7 +886,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -816,14 +898,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -834,7 +918,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -845,14 +930,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}},
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -860,7 +947,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 70, "character": 4}}}}],
+     "position": {"line": 70, "character": 4}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
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@@ -872,7 +960,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -883,7 +972,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -894,14 +984,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -912,7 +1004,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -923,14 +1016,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}},
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -938,7 +1033,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 76, "character": 2}}}}],
+     "position": {"line": 76, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 81, "character": 4}}
@@ -953,7 +1049,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -964,7 +1061,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -975,14 +1073,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -993,7 +1093,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -1004,14 +1105,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}},
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -1019,7 +1122,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 86, "character": 2}}}}],
+     "position": {"line": 86, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 91, "character": 4}}
@@ -1031,7 +1135,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -1042,7 +1147,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -1053,14 +1159,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -1071,7 +1179,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -1082,14 +1191,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}},
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -1097,7 +1208,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 91, "character": 4}}}}],
+     "position": {"line": 91, "character": 4}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 96, "character": 2}}
@@ -1109,7 +1221,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -1120,7 +1233,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -1131,14 +1245,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -1149,7 +1265,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -1160,14 +1277,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}},
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -1175,7 +1294,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 96, "character": 2}}}}],
+     "position": {"line": 96, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 102, "character": 4}}
@@ -1187,7 +1307,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -1198,7 +1319,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -1209,14 +1331,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -1227,7 +1351,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -1238,14 +1363,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}},
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -1253,7 +1380,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 102, "character": 4}}}}],
+     "position": {"line": 102, "character": 4}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///completionTactics.lean"},
  "position": {"line": 108, "character": 2}}
@@ -1268,7 +1396,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "Lean.Parser.Tactic.introMatch",
    "kind": 14,
@@ -1279,7 +1408,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "Lean.Parser.Tactic.match",
    "kind": 14,
@@ -1290,14 +1420,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "Lean.Parser.Tactic.nestedTactic",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "Lean.Parser.Tactic.open",
    "kind": 14,
@@ -1308,7 +1440,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "Lean.Parser.Tactic.set_option",
    "kind": 14,
@@ -1319,14 +1452,16 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "6",
    "label": "Lean.Parser.Tactic.unknown",
    "kind": 14,
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}},
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}},
   {"sortText": "7",
    "label": "skip",
    "kind": 14,
@@ -1334,5 +1469,6 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///completionTactics.lean"},
-     "position": {"line": 112, "character": 2}}}}],
+     "position": {"line": 112, "character": 2}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/dotIdCompletion.lean.expected.out b/tests/lean/interactive/dotIdCompletion.lean.expected.out
index 1cca64cc65..75efda6613 100644
--- a/tests/lean/interactive/dotIdCompletion.lean.expected.out
+++ b/tests/lean/interactive/dotIdCompletion.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///dotIdCompletion.lean"},
      "position": {"line": 4, "character": 5}},
-    "id": {"const": {"declName": "Boo.true"}}}},
+    "id": {"const": {"declName": "Boo.true"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "truth",
    "kind": 4,
@@ -16,5 +17,6 @@
    {"params":
     {"textDocument": {"uri": "file:///dotIdCompletion.lean"},
      "position": {"line": 4, "character": 5}},
-    "id": {"const": {"declName": "Boo.truth"}}}}],
+    "id": {"const": {"declName": "Boo.truth"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/editCompletion.lean.expected.out b/tests/lean/interactive/editCompletion.lean.expected.out
index 104ba7b4bf..56deb0a4c0 100644
--- a/tests/lean/interactive/editCompletion.lean.expected.out
+++ b/tests/lean/interactive/editCompletion.lean.expected.out
@@ -8,5 +8,6 @@
    {"params":
     {"textDocument": {"uri": "file:///editCompletion.lean"},
      "position": {"line": 3, "character": 22}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/inWordCompletion.lean.expected.out b/tests/lean/interactive/inWordCompletion.lean.expected.out
index 0c61f227a9..4859dcb72f 100644
--- a/tests/lean/interactive/inWordCompletion.lean.expected.out
+++ b/tests/lean/interactive/inWordCompletion.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 4, "character": 11}},
-    "id": {"const": {"declName": "gfxabc"}}}},
+    "id": {"const": {"declName": "gfxabc"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "gfxacc",
    "kind": 3,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 4, "character": 11}},
-    "id": {"const": {"declName": "gfxacc"}}}},
+    "id": {"const": {"declName": "gfxacc"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "gfxadc",
    "kind": 3,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 4, "character": 11}},
-    "id": {"const": {"declName": "gfxadc"}}}}],
+    "id": {"const": {"declName": "gfxadc"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///inWordCompletion.lean"},
  "position": {"line": 12, "character": 15}}
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "Boo.gfxabc"}}}},
+    "id": {"const": {"declName": "Boo.gfxabc"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "gfxacc",
    "kind": 3,
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "Boo.gfxacc"}}}},
+    "id": {"const": {"declName": "Boo.gfxacc"}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "gfxadc",
    "kind": 3,
@@ -52,5 +57,6 @@
    {"params":
     {"textDocument": {"uri": "file:///inWordCompletion.lean"},
      "position": {"line": 12, "character": 15}},
-    "id": {"const": {"declName": "Boo.gfxadc"}}}}],
+    "id": {"const": {"declName": "Boo.gfxadc"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/internalNamesIssue.lean.expected.out b/tests/lean/interactive/internalNamesIssue.lean.expected.out
index d2e2dd36fd..36d36c565f 100644
--- a/tests/lean/interactive/internalNamesIssue.lean.expected.out
+++ b/tests/lean/interactive/internalNamesIssue.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///internalNamesIssue.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "Foo.bla"}}}},
+    "id": {"const": {"declName": "Foo.bla"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "foo",
    "kind": 3,
@@ -16,5 +17,6 @@
    {"params":
     {"textDocument": {"uri": "file:///internalNamesIssue.lean"},
      "position": {"line": 9, "character": 11}},
-    "id": {"const": {"declName": "Foo.foo"}}}}],
+    "id": {"const": {"declName": "Foo.foo"}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/keywordCompletion.lean.expected.out b/tests/lean/interactive/keywordCompletion.lean.expected.out
index 19498180d6..ca9f2d2217 100644
--- a/tests/lean/interactive/keywordCompletion.lean.expected.out
+++ b/tests/lean/interactive/keywordCompletion.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
      "position": {"line": 4, "character": 10}},
-    "id": {"const": {"declName": "bin"}}}},
+    "id": {"const": {"declName": "bin"}},
+    "cPos": 0}},
   {"sortText": "1",
    "label": "binder_predicate",
    "kind": 14,
@@ -16,7 +17,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 10}}}},
+     "position": {"line": 4, "character": 10}},
+    "cPos": 0}},
   {"sortText": "2",
    "label": "binop%",
    "kind": 14,
@@ -24,7 +26,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 10}}}},
+     "position": {"line": 4, "character": 10}},
+    "cPos": 0}},
   {"sortText": "3",
    "label": "binop_lazy%",
    "kind": 14,
@@ -32,7 +35,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 10}}}},
+     "position": {"line": 4, "character": 10}},
+    "cPos": 0}},
   {"sortText": "4",
    "label": "binrel%",
    "kind": 14,
@@ -40,7 +44,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 10}}}},
+     "position": {"line": 4, "character": 10}},
+    "cPos": 0}},
   {"sortText": "5",
    "label": "binrel_no_prop%",
    "kind": 14,
@@ -48,7 +53,8 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 10}}}}],
+     "position": {"line": 4, "character": 10}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///keywordCompletion.lean"},
  "position": {"line": 4, "character": 13}}
@@ -60,5 +66,6 @@
    "data":
    {"params":
     {"textDocument": {"uri": "file:///keywordCompletion.lean"},
-     "position": {"line": 4, "character": 13}}}}],
+     "position": {"line": 4, "character": 13}},
+    "cPos": 0}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/match.lean.expected.out b/tests/lean/interactive/match.lean.expected.out
index 4965eee71f..3c149c1dd5 100644
--- a/tests/lean/interactive/match.lean.expected.out
+++ b/tests/lean/interactive/match.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 6, "character": 11}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "name",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 6, "character": 11}},
-    "id": {"const": {"declName": "S.name"}}}},
+    "id": {"const": {"declName": "S.name"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "value",
    "kind": 5,
@@ -24,7 +26,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 6, "character": 11}},
-    "id": {"const": {"declName": "S.value"}}}}],
+    "id": {"const": {"declName": "S.value"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///match.lean"},
  "position": {"line": 10, "character": 10}}
@@ -36,7 +39,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 10, "character": 10}},
-    "id": {"const": {"declName": "S.fn1"}}}},
+    "id": {"const": {"declName": "S.fn1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "name",
    "kind": 5,
@@ -44,7 +48,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 10, "character": 10}},
-    "id": {"const": {"declName": "S.name"}}}},
+    "id": {"const": {"declName": "S.name"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "value",
    "kind": 5,
@@ -52,7 +57,8 @@
    {"params":
     {"textDocument": {"uri": "file:///match.lean"},
      "position": {"line": 10, "character": 10}},
-    "id": {"const": {"declName": "S.value"}}}}],
+    "id": {"const": {"declName": "S.value"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///match.lean"},
  "position": {"line": 14, "character": 2}}
diff --git a/tests/lean/interactive/matchStxCompletion.lean.expected.out b/tests/lean/interactive/matchStxCompletion.lean.expected.out
index 6e9e15b097..86d0747ddd 100644
--- a/tests/lean/interactive/matchStxCompletion.lean.expected.out
+++ b/tests/lean/interactive/matchStxCompletion.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///matchStxCompletion.lean"},
      "position": {"line": 8, "character": 9}},
-    "id": {"const": {"declName": "C.b1"}}}},
+    "id": {"const": {"declName": "C.b1"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "f1",
    "kind": 5,
@@ -16,7 +17,8 @@
    {"params":
     {"textDocument": {"uri": "file:///matchStxCompletion.lean"},
      "position": {"line": 8, "character": 9}},
-    "id": {"const": {"declName": "C.f1"}}}},
+    "id": {"const": {"declName": "C.f1"}},
+    "cPos": 1}},
   {"sortText": "2",
    "label": "f2",
    "kind": 5,
@@ -24,5 +26,6 @@
    {"params":
     {"textDocument": {"uri": "file:///matchStxCompletion.lean"},
      "position": {"line": 8, "character": 9}},
-    "id": {"const": {"declName": "C.f2"}}}}],
+    "id": {"const": {"declName": "C.f2"}},
+    "cPos": 1}}],
  "isIncomplete": true}
diff --git a/tests/lean/interactive/travellingCompletions.lean.expected.out b/tests/lean/interactive/travellingCompletions.lean.expected.out
index 15c1f442e7..b04e4b81cd 100644
--- a/tests/lean/interactive/travellingCompletions.lean.expected.out
+++ b/tests/lean/interactive/travellingCompletions.lean.expected.out
@@ -8,7 +8,8 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 7, "character": 33}},
-    "id": {"const": {"declName": "aaaaaaaa"}}}}],
+    "id": {"const": {"declName": "aaaaaaaa"}},
+    "cPos": 0}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///travellingCompletions.lean"},
  "position": {"line": 20, "character": 20}}
@@ -20,7 +21,8 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 20, "character": 20}},
-    "id": {"const": {"declName": "Bar.foobar"}}}}],
+    "id": {"const": {"declName": "Bar.foobar"}},
+    "cPos": 2}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///travellingCompletions.lean"},
  "position": {"line": 24, "character": 16}}
@@ -32,7 +34,8 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 24, "character": 16}},
-    "id": {"const": {"declName": "Bar.foobar"}}}}],
+    "id": {"const": {"declName": "Bar.foobar"}},
+    "cPos": 2}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///travellingCompletions.lean"},
  "position": {"line": 38, "character": 45}}
@@ -44,7 +47,8 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 38, "character": 45}},
-    "id": {"const": {"declName": "Prod.continuousAdd"}}}},
+    "id": {"const": {"declName": "Prod.continuousAdd"}},
+    "cPos": 1}},
   {"sortText": "1",
    "label": "continuousSMul",
    "kind": 23,
@@ -52,7 +56,8 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 38, "character": 45}},
-    "id": {"const": {"declName": "Prod.continuousSMul"}}}}],
+    "id": {"const": {"declName": "Prod.continuousSMul"}},
+    "cPos": 1}}],
  "isIncomplete": true}
 {"textDocument": {"uri": "file:///travellingCompletions.lean"},
  "position": {"line": 42, "character": 25}}
@@ -68,5 +73,6 @@
    {"params":
     {"textDocument": {"uri": "file:///travellingCompletions.lean"},
      "position": {"line": 42, "character": 25}},
-    "id": {"const": {"declName": "True.intro"}}}}],
+    "id": {"const": {"declName": "True.intro"}},
+    "cPos": 1}}],
  "isIncomplete": true}