Don't add property symbol for CLIEvent member.

docs/release-notes/.FSharp.Compiler.Service/8.0.300.md

@@ -5,8 +5,8 @@
 * `nameof Module` expressions and patterns are processed to link files in `--test:GraphBasedChecking`. ([PR #16550](https://github.com/dotnet/fsharp/pull/16550))
 * Graph Based Checking doesn't throw on invalid parsed input so it can be used for IDE scenarios ([PR #16575](https://github.com/dotnet/fsharp/pull/16575), [PR #16588](https://github.com/dotnet/fsharp/pull/16588), [PR #16643](https://github.com/dotnet/fsharp/pull/16643))
 * Keep parens for problematic exprs (`if`, `match`, etc.) in `$"{(…):N0}"`, `$"{(…),-3}"`, etc. ([PR #16578](https://github.com/dotnet/fsharp/pull/16578))
-* Fix crash in DOTNET_SYSTEM_GLOBALIZATION_INVARIANT mode [#PR 16471](https://github.com/dotnet/fsharp/pull/16471))
-
+* Fix crash in DOTNET_SYSTEM_GLOBALIZATION_INVARIANT mode ([PR #16471](https://github.com/dotnet/fsharp/pull/16471))
+* `[<CliEvent>]` member should not produce property symbol. ([Issue #16640](https://github.com/dotnet/fsharp/issues/16640), [PR #16658](https://github.com/dotnet/fsharp/pull/16658))
 
 ### Added
 

src/Compiler/Checking/CheckDeclarations.fs

@@ -1140,11 +1140,11 @@ module MutRecBindingChecking =
                     for b1, b2 in List.pairwise defnAs do
                         match b1, b2 with
                         | TyconBindingPhase2A.Phase2AMember {
-                            SyntacticBinding = NormalizedBinding(pat = SynPat.Named(ident = SynIdent(ident = getIdent)); valSynData = SynValData(memberFlags = Some mf))
+                            SyntacticBinding = NormalizedBinding(pat = SynPat.Named(ident = SynIdent(ident = Get_OrSet_Ident & getIdent)); valSynData = SynValData(memberFlags = Some mf))
                             RecBindingInfo = RecursiveBindingInfo(vspec = vGet)
                           },
                           TyconBindingPhase2A.Phase2AMember {
-                            SyntacticBinding = NormalizedBinding(pat = SynPat.Named(ident = SynIdent(ident = setIdent)))
+                            SyntacticBinding = NormalizedBinding(pat = SynPat.Named(ident = SynIdent(ident = Get_OrSet_Ident & setIdent)))
                             RecBindingInfo = RecursiveBindingInfo(vspec = vSet)
                           } when Range.equals getIdent.idRange setIdent.idRange ->
                             match  vGet.ApparentEnclosingEntity with

src/Compiler/SyntaxTree/SyntaxTreeOps.fs

@@ -1062,3 +1062,9 @@ let (|TypesForTypar|) (t: SynType) =
         | _ -> continuation [ t ]
 
     visit id t
+
+[<return: Struct>]
+let (|Get_OrSet_Ident|_|) (ident: Ident) =
+    if ident.idText.StartsWithOrdinal("get_") then ValueSome()
+    elif ident.idText.StartsWithOrdinal("set_") then ValueSome()
+    else ValueNone

src/Compiler/SyntaxTree/SyntaxTreeOps.fsi

@@ -355,3 +355,7 @@ val getTypeFromTuplePath: path: SynTupleTypeSegment list -> SynType list
 val (|MultiDimensionArrayType|_|): t: SynType -> (int * SynType * range) voption
 
 val (|TypesForTypar|): t: SynType -> SynType list
+
+/// Generated get_XYZ or set_XYZ ident text
+[<return: Struct>]
+val (|Get_OrSet_Ident|_|): Ident -> unit voption

tests/service/Symbols.fs

@@ -1214,3 +1214,24 @@ type T() =
     let i = 1
 """
         assertHasSymbolUsages ["i"] checkResults
+
+module Event =
+    [<Test>]
+    let ``CLIEvent member does not produce additional property symbol`` () =
+        let _, checkResults = getParseAndCheckResults """
+type T() = 
+    [<CLIEvent>]
+    member this.Event = Event<int>().Publish
+"""
+        let allSymbols =
+            checkResults.GetSymbolUsesAtLocation(4, 21, "    member this.Event = Event<int>().Publish", [ "Event" ])
+
+        let hasPropertySymbols =
+            allSymbols
+            |> List.exists (fun su ->
+                match su.Symbol with
+                | :? FSharpMemberOrFunctionOrValue as mfv -> mfv.IsProperty
+                | _ -> false
+            )
+
+        Assert.False hasPropertySymbols