warning for mismatched param names

src/absil/il.fs

@@ -675,27 +675,33 @@ and [<RequireQualifiedAccess; StructuralEquality; StructuralComparison>]
 
     member x.QualifiedNameWithNoShortPrimaryAssembly = 
         x.AddQualifiedNameExtensionWithNoShortPrimaryAssembly(x.BasicQualifiedName)
+
     member x.TypeSpec =
       match x with 
       | ILType.Boxed tr | ILType.Value tr -> tr
       | _ -> invalidOp "not a nominal type"
+
     member x.Boxity =
       match x with 
       | ILType.Boxed _ -> AsObject
       | ILType.Value _ -> AsValue
       | _ -> invalidOp "not a nominal type"
+
     member x.TypeRef = 
       match x with 
       | ILType.Boxed tspec | ILType.Value tspec -> tspec.TypeRef
       | _ -> invalidOp "not a nominal type"
+
     member x.IsNominal = 
       match x with 
       | ILType.Boxed _ | ILType.Value _ -> true
       | _ -> false
+
     member x.GenericArgs =
       match x with 
       | ILType.Boxed tspec | ILType.Value tspec -> tspec.GenericArgs
       | _ -> []
+
     member x.IsTyvar =
       match x with 
       | ILType.TypeVar _ -> true | _ -> false
@@ -843,9 +849,9 @@ type ILAttribute =
 
 [<NoEquality; NoComparison; Sealed>]
 type ILAttributes(f: unit -> ILAttribute[]) = 
-   let mutable array = InlineDelayInit<_>(f)
-   member x.AsArray = array.Value
-   member x.AsList = x.AsArray |> Array.toList
+    let mutable array = InlineDelayInit<_>(f)
+    member x.AsArray = array.Value
+    member x.AsList = x.AsArray |> Array.toList
 
 type ILCodeLabel = int
 

src/fsharp/CompileOps.fs

@@ -399,6 +399,7 @@ let warningOn err level specificWarnOn =
     // Some specific warnings are never on by default, i.e. unused variable warnings
     match n with 
     | 1182 -> false // chkUnusedValue - off by default
+    | 3218 -> false // ArgumentsInSigAndImplMismatch - off by default
     | 3180 -> false // abImplicitHeapAllocation - off by default
     | _ -> level >= GetWarningLevel err 
 

src/fsharp/FSComp.txt

@@ -1420,3 +1420,4 @@ notAFunctionButMaybeIndexerWithName,"This value is not a function and cannot be
 notAFunctionButMaybeIndexer,"This expression is not a function and cannot be applied. Did you intend to access the indexer via expr.[index] instead?"
 3217,notAFunctionButMaybeIndexerErrorCode,""
 notAFunctionButMaybeDeclaration,"This value is not a function and cannot be applied. Did you forget to terminate a declaration?"
+3218,ArgumentsInSigAndImplMismatch,"The argument names in the signature '%s' and implementation '%s' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling."

src/fsharp/FSharp.Core/prim-types.fs

@@ -2781,21 +2781,21 @@ namespace Microsoft.FSharp.Core
               inherit FSharpFunc<'T,('U -> 'V)>()
               abstract Invoke : 'T * 'U -> 'V
               override f.Invoke(t) = (fun u -> f.Invoke(t,u))
-              static member Adapt(f : 'T -> 'U -> 'V) = 
-                  match box f with 
+              static member Adapt(func : 'T -> 'U -> 'V) = 
+                  match box func with 
                   // Does it take two arguments without side effect?
                   | :? FSharpFunc<'T,'U,'V> as f -> f
 
                   | _ -> { new FSharpFunc<'T,'U,'V>() with 
-                              member x.Invoke(t,u) = (retype f : FSharpFunc<'T,FSharpFunc<'U,'V>>).Invoke(t).Invoke(u) }
+                              member x.Invoke(t,u) = (retype func : FSharpFunc<'T,FSharpFunc<'U,'V>>).Invoke(t).Invoke(u) }
 
           [<AbstractClass>]
           type FSharpFunc<'T,'U,'V,'W>() = 
               inherit FSharpFunc<'T,('U -> 'V -> 'W)>()
               abstract Invoke : 'T * 'U * 'V -> 'W
               override f.Invoke(t) = (fun u v -> f.Invoke(t,u,v))
-              static member Adapt(f : 'T -> 'U -> 'V -> 'W) = 
-                  match box f with 
+              static member Adapt(func : 'T -> 'U -> 'V -> 'W) = 
+                  match box func with 
                   // Does it take three arguments without side effect?
                   | :? FSharpFunc<'T,'U,'V,'W> as f -> f
 
@@ -2805,7 +2805,7 @@ namespace Microsoft.FSharp.Core
                               member x.Invoke(t,u,v) = f.Invoke(t,u).Invoke(v) }
 
                   | _ -> { new FSharpFunc<'T,'U,'V,'W>() with 
-                              member x.Invoke(t,u,v) = (retype f : FSharpFunc<'T,('U -> 'V -> 'W)>).Invoke(t) u v }
+                              member x.Invoke(t,u,v) = (retype func : FSharpFunc<'T,('U -> 'V -> 'W)>).Invoke(t) u v }
 
           [<AbstractClass>]
           type FSharpFunc<'T,'U,'V,'W,'X>() = 

src/fsharp/SignatureConformance.fs

@@ -249,6 +249,11 @@ type Checker(g, amap, denv, remapInfo: SignatureRepackageInfo, checkingSig) =
                   let res = 
                       (implArgInfos,sigArgInfos) ||> List.forall2 (List.forall2 (fun implArgInfo sigArgInfo -> 
                           checkAttribs aenv implArgInfo.Attribs sigArgInfo.Attribs (fun attribs -> 
+                              match implArgInfo.Name, sigArgInfo.Name with 
+                              | Some iname, Some sname when sname.idText <> iname.idText -> 
+                                   warning(Error (FSComp.SR.ArgumentsInSigAndImplMismatch(sname.idText, iname.idText),iname.idRange))
+                              | _ -> ()
+
                               implArgInfo.Name <- sigArgInfo.Name
                               implArgInfo.Attribs <- attribs))) && 
 

tests/fsharp/tests.fs

@@ -2142,6 +2142,12 @@ module TypecheckTests =
     [<Test>] 
     let ``type check neg99`` () = singleNegTest (testConfig "typecheck/sigs") "neg99"
 
+    [<Test>] 
+    let ``type check neg100`` () = 
+        let cfg = testConfig "typecheck/sigs"
+        let cfg = { cfg with fsc_flags = cfg.fsc_flags + " --warnon:3218" }
+        singleNegTest cfg "neg100"
+
     [<Test>] 
     let ``type check neg_byref_1`` () = singleNegTest (testConfig "typecheck/sigs") "neg_byref_1"
 
@@ -2208,6 +2214,7 @@ module TypecheckTests =
     [<Test>] 
     let ``type check neg_byref_23`` () = singleNegTest (testConfig "typecheck/sigs") "neg_byref_23"
 
+
 module FscTests =                 
     [<Test>]
     let ``should be raised if AssemblyInformationalVersion has invalid version`` () = 

tests/fsharp/typecheck/sigs/neg100.bsl

@@ -0,0 +1,18 @@
+
+neg100.fs(9,12,9,16): typecheck error FS3218: The argument names in the signature 'xxxx' and implementation 'qqqq' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(8,12,8,16): typecheck error FS3218: The argument names in the signature 'xxx' and implementation 'qqqq' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(7,12,7,16): typecheck error FS3218: The argument names in the signature 'xx' and implementation 'qqqq' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(6,12,6,16): typecheck error FS3218: The argument names in the signature 'x' and implementation 'qqqq' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(15,17,15,22): typecheck error FS3218: The argument names in the signature 'xxxx' and implementation 'qqqq3' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(14,17,14,22): typecheck error FS3218: The argument names in the signature 'xxx' and implementation 'qqqq3' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(13,17,13,22): typecheck error FS3218: The argument names in the signature 'xx' and implementation 'qqqq3' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(12,17,12,22): typecheck error FS3218: The argument names in the signature 'x' and implementation 'qqqq3' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.
+
+neg100.fs(11,9,11,14): typecheck error FS3218: The argument names in the signature 'aaa' and implementation 'qqqq2' do not match. The argument name from the signature file will be used. This may cause problems when debugging or profiling.

tests/fsharp/typecheck/sigs/neg100.fs

@@ -0,0 +1,16 @@
+
+
+module M
+
+let ffff ok = ok + 3
+let gggg1 (qqqq : int) = qqqq + 3
+let gggg2 (qqqq : int) = qqqq + 3
+let gggg3 (qqqq : int) = qqqq + 3
+let gggg4 (qqqq : int) = qqqq + 3
+
+type C( qqqq2: int) = 
+  member __.M1 (qqqq3: int) = qqqq2 + qqqq3 |> ignore
+  member __.M2 (qqqq3: int) = qqqq2 + qqqq3 |> ignore
+  member __.M3 (qqqq3: int) = qqqq2 + qqqq3 |> ignore
+  member __.M4 (qqqq3: int) = qqqq2 + qqqq3 |> ignore
+

tests/fsharp/typecheck/sigs/neg100.fsi

@@ -0,0 +1,16 @@
+
+
+module M
+
+val ffff : int -> int
+val gggg1 : x: int -> int
+val gggg2 : xx: int -> int
+val gggg3 : xxx: int -> int
+val gggg4 : xxxx: int -> int
+
+type C = 
+ new : aaa : int -> C
+ member M1 : x:int -> unit
+ member M2 : xx:int -> unit
+ member M3 : xxx:int -> unit
+ member M4 : xxxx:int -> unit

vsintegration/src/FSharp.Editor/CodeFix/AddNewKeywordToDisposableConstructorInvocation.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System.Composition
 open System.Collections.Immutable

vsintegration/src/FSharp.Editor/CodeFix/AddOpenCodeFixProvider.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System
 open System.Composition

vsintegration/src/FSharp.Editor/CodeFix/FixIndexerAccess.fs

@@ -1,34 +1,22 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System
 open System.Composition
 open System.Collections.Immutable
-open System.Threading
 open System.Threading.Tasks
 
 open Microsoft.CodeAnalysis
 open Microsoft.CodeAnalysis.Text
 open Microsoft.CodeAnalysis.CodeFixes
-open Microsoft.CodeAnalysis.CodeActions
+open SymbolHelpers
 
 [<ExportCodeFixProvider(FSharpConstants.FSharpLanguageName, Name = "FixIndexerAccess"); Shared>]
 type internal FSharpFixIndexerAccessCodeFixProvider() =
     inherit CodeFixProvider()
     let fixableDiagnosticIds = set ["FS3217"]
 
-    let createCodeFix (title: string, context: CodeFixContext, textChange: TextChange) =
-        CodeAction.Create(
-            title,
-            (fun (cancellationToken: CancellationToken) ->
-                async {
-                    let! cancellationToken = Async.CancellationToken
-                    let! sourceText = context.Document.GetTextAsync(cancellationToken) |> Async.AwaitTask
-                    return context.Document.WithText(sourceText.WithChanges(textChange))
-                } |> RoslynHelpers.StartAsyncAsTask(cancellationToken)),
-            title)
-
     override __.FixableDiagnosticIds = Seq.toImmutableArray fixableDiagnosticIds
 
     override __.RegisterCodeFixesAsync context : Task =
@@ -60,9 +48,10 @@ type internal FSharpFixIndexerAccessCodeFixProvider() =
                         | _ -> context.Span,sourceText.GetSubText(context.Span).ToString()
 
                     let codefix = 
-                        createCodeFix(
+                        createTextChangeCodeFix(
                             FSComp.SR.addIndexerDot(), 
                             context,
-                            TextChange(span, replacement.TrimEnd() + "."))
+                            (fun () -> asyncMaybe.Return [| TextChange(span, replacement.TrimEnd() + ".") |]))
+
                     context.RegisterCodeFix(codefix, diagnostics))
         } |> RoslynHelpers.StartAsyncUnitAsTask(context.CancellationToken)

vsintegration/src/FSharp.Editor/CodeFix/ImplementInterfaceCodeFixProvider.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System
 open System.Composition

vsintegration/src/FSharp.Editor/CodeFix/MissingReferenceCodeFixProvider.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System
 open System.Composition

vsintegration/src/FSharp.Editor/CodeFix/ProposeUppercaseLabel.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System.Composition
 open System.Threading.Tasks

vsintegration/src/FSharp.Editor/CodeFix/RemoveUnusedOpens.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System.Composition
 open System.Threading

vsintegration/src/FSharp.Editor/CodeFix/RenameParamToMatchSignature.fs

@@ -0,0 +1,64 @@
+// Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
+
+namespace Microsoft.VisualStudio.FSharp.Editor
+
+open System
+open System.Collections.Immutable
+open System.Composition
+open System.Threading.Tasks
+
+open Microsoft.CodeAnalysis
+open Microsoft.CodeAnalysis.Text
+open Microsoft.CodeAnalysis.CodeFixes
+
+open Microsoft.FSharp.Compiler
+open Microsoft.FSharp.Compiler.SourceCodeServices
+open Microsoft.VisualStudio.FSharp.Editor.SymbolHelpers
+open Microsoft.FSharp.Compiler.SourceCodeServices.Keywords
+
+[<ExportCodeFixProvider(FSharpConstants.FSharpLanguageName, Name = "FSharpRenameParamToMatchSignature"); Shared>]
+type internal FSharpRenameParamToMatchSignature
+    [<ImportingConstructor>]
+    (
+        checkerProvider: FSharpCheckerProvider, 
+        projectInfoManager: FSharpProjectOptionsManager
+    ) =
+
+    inherit CodeFixProvider()
+    static let userOpName = "RenameParamToMatchSignature"
+    let fixableDiagnosticIds = ["FS3218"]
+
+
+    override __.FixableDiagnosticIds = Seq.toImmutableArray fixableDiagnosticIds
+
+    override __.RegisterCodeFixesAsync context : Task =
+        asyncMaybe {
+            match context.Diagnostics |> Seq.filter (fun x -> fixableDiagnosticIds |> List.contains x.Id) |> Seq.toList with 
+            | [diagnostic] -> 
+                    let message = diagnostic.GetMessage()
+                    let parts = System.Text.RegularExpressions.Regex.Match(message, ".+'(.+)'.+'(.+)'.+")
+                    if parts.Success then
+
+                        let diagnostics = ImmutableArray.Create diagnostic
+                        let suggestion = parts.Groups.[1].Value
+                        let replacement = QuoteIdentifierIfNeeded suggestion
+                        let computeChanges() = 
+                            asyncMaybe {
+                                let document = context.Document
+                                let! cancellationToken = Async.CancellationToken |> liftAsync
+                                let! sourceText = document.GetTextAsync(cancellationToken)
+                                let! symbolUses = getSymbolUsesOfSymbolAtLocationInDocument (document, context.Span.Start, projectInfoManager, checkerProvider.Checker, userOpName) 
+                                let changes = 
+                                    [| for symbolUse in symbolUses do
+                                            match RoslynHelpers.TryFSharpRangeToTextSpan(sourceText, symbolUse.RangeAlternate) with 
+                                            | None -> ()
+                                            | Some span -> 
+                                                let textSpan = Tokenizer.fixupSpan(sourceText, span)
+                                                yield TextChange(textSpan, replacement) |]
+                                return changes 
+                            }
+                        let title = FSComp.SR.replaceWithSuggestion suggestion
+                        let codefix = createTextChangeCodeFix(title, context, computeChanges)
+                        context.RegisterCodeFix(codefix, diagnostics)
+            | _ -> ()
+        } |> Async.Ignore |> RoslynHelpers.StartAsyncUnitAsTask(context.CancellationToken)

vsintegration/src/FSharp.Editor/CodeFix/RenameUnusedValue.fs

@@ -1,6 +1,6 @@
 // Copyright (c) Microsoft Corporation.  All Rights Reserved.  See License.txt in the project root for license information.
 
-namespace rec Microsoft.VisualStudio.FSharp.Editor
+namespace Microsoft.VisualStudio.FSharp.Editor
 
 open System
 open System.Composition