add more modifiers

Author: KnisterPeter

src/services/codefixes/fixUnusedIdentifier.ts

@@ -200,9 +200,12 @@ namespace ts.codefix {
 
     function tryDeleteParameter(changes: textChanges.ChangeTracker, sourceFile: SourceFile, p: ParameterDeclaration, checker: TypeChecker, sourceFiles: ReadonlyArray<SourceFile>, isFixAll: boolean): void {
         if (mayDeleteParameter(p, checker, isFixAll)) {
-            const privateModifier = findModifier(p, SyntaxKind.PrivateKeyword);
-            if (privateModifier) {
-                changes.deleteModifier(sourceFile, p.modifiers![0]);
+            const modifiers: Modifier["kind"][] = [SyntaxKind.PrivateKeyword, SyntaxKind.ProtectedKeyword, SyntaxKind.PublicKeyword, SyntaxKind.ReadonlyKeyword];
+            const foundModifiers = modifiers.map(modifier => findModifier(p, modifier)).filter(modifier => modifier !== undefined);
+            if (foundModifiers.length > 0) {
+                foundModifiers.forEach(modifier => {
+                    changes.deleteModifier(sourceFile, modifier!);
+                });
             }
             else {
                 changes.delete(sourceFile, p);

tests/cases/fourslash/codeFixUnusedIdentifier_parameter_modifier.ts

@@ -5,7 +5,7 @@
 
 ////export class Example {
 ////    prop: any;
-////    constructor(private arg: any) {
+////    constructor(private readonly arg: any) {
 ////        this.prop = arg;
 ////    }
 ////}