Detect get/set combination for GetStructuredToolTipText.

src/Compiler/Service/FSharpCheckerResults.fs

@@ -1764,13 +1764,27 @@ type internal TypeCheckInfo
                     match declItemsOpt with
                     | None -> emptyToolTip
                     | Some (items, denv, _, m) ->
-                        ToolTipText(
-                            items
-                            |> List.map (fun x ->
-                                let symbol = Some(FSharpSymbol.Create(cenv, x.Item))
-                                FormatStructuredDescriptionOfItem false infoReader tcAccessRights m denv x.ItemWithInst symbol width)
-                        ))
+                        let mkToolTipText (items: CompletionItem list) =
+                            ToolTipText(
+                                items
+                                |> List.map (fun x ->
+                                    let symbol = Some(FSharpSymbol.Create(cenv, x.Item))
+                                    FormatStructuredDescriptionOfItem false infoReader tcAccessRights m denv x.ItemWithInst symbol width)
+                            )
+
+                        match items with
+                        | [ getItem; setItem ] ->
+                            match getItem.Item, setItem.Item with
+                            | Item.Value vr1, Item.Value vr2 when vr1.PropertyName = vr2.PropertyName ->
+                                let getItem =
+                                    if (vr1.CompiledName None).StartsWith "get_" then
+                                        getItem
+                                    else
+                                        setItem
 
+                                mkToolTipText [ getItem ]
+                            | _ -> mkToolTipText items
+                        | items -> mkToolTipText items)
                 (fun err ->
                     Trace.TraceInformation(sprintf "FCS: recovering from error in GetStructuredToolTipText: '%s'" err)
                     ToolTipText [ ToolTipElement.CompositionError err ])

tests/FSharp.Compiler.Service.Tests/TooltipTests.fs

@@ -385,3 +385,30 @@ c.Abc
 """
 
     testToolTipSquashing source 7 5 "c.Abc" [ "c"; "Abc" ] FSharpTokenTag.Identifier
+
+[<Test>]
+let ``Auto property should display a single tool tip`` () =
+    let source = """
+namespace Foo
+
+/// Some comment on class
+type Bar() =
+    /// Some comment on class member
+    member val Foo = "bla" with get, set
+"""
+    let fileName, options =
+        mkTestFileAndOptions
+            source
+            Array.empty
+    let _, checkResults = parseAndCheckFile fileName source options
+    let (ToolTipText(items)) = checkResults.GetToolTip(7, 18, "    member val Foo = \"bla\" with get, set", [ "Foo" ], FSharpTokenTag.Identifier)
+    Assert.True (items.Length = 1)
+    match items.[0] with
+    | ToolTipElement.Group [ { MainDescription = description } ] ->
+        let toolTipText =
+            description
+            |> Array.map (fun taggedText -> taggedText.Text)
+            |> String.concat ""
+
+        Assert.AreEqual("member Bar.Foo: string", toolTipText)
+    | _ -> Assert.Fail $"Expected group, got {items.[0]}"