Added "readonly" to Type Keywords

Author: minajevs

src/harness/fourslash.ts

@@ -865,7 +865,7 @@ namespace FourSlash {
             ts.zipWith(actual, expected, (completion, expectedCompletion, index) => {
                 const name = typeof expectedCompletion === "string" ? expectedCompletion : expectedCompletion.name;
                 if (completion.name !== name) {
-                    this.raiseError(`${marker ? JSON.stringify(marker) : "" } Expected completion at index ${index} to be ${name}, got ${completion.name}`);
+                    this.raiseError(`${marker ? JSON.stringify(marker) : ""} Expected completion at index ${index} to be ${name}, got ${completion.name}`);
                 }
                 this.verifyCompletionEntry(completion, expectedCompletion);
             });
@@ -3742,7 +3742,7 @@ namespace FourSlashInterface {
     }
 
     export class Plugins {
-        constructor (private state: FourSlash.TestState) {
+        constructor(private state: FourSlash.TestState) {
         }
 
         public configurePlugin(pluginName: string, configuration: any): void {
@@ -4565,7 +4565,7 @@ namespace FourSlashInterface {
         export const keywords: ReadonlyArray<ExpectedCompletionEntryObject> = keywordsWithUndefined.filter(k => k.name !== "undefined");
 
         export const typeKeywords: ReadonlyArray<ExpectedCompletionEntryObject> =
-            ["false", "null", "true", "void", "any", "boolean", "keyof", "never", "number", "object", "string", "symbol", "undefined", "unique", "unknown", "bigint"].map(keywordEntry);
+            ["false", "null", "true", "void", "any", "boolean", "keyof", "never", "readonly", "number", "object", "string", "symbol", "undefined", "unique", "unknown", "bigint"].map(keywordEntry);
 
         const globalTypeDecls: ReadonlyArray<ExpectedCompletionEntryObject> = [
             interfaceEntry("Symbol"),

src/services/utilities.ts

@@ -1224,6 +1224,7 @@ namespace ts {
         SyntaxKind.NullKeyword,
         SyntaxKind.NumberKeyword,
         SyntaxKind.ObjectKeyword,
+        SyntaxKind.ReadonlyKeyword,
         SyntaxKind.StringKeyword,
         SyntaxKind.SymbolKeyword,
         SyntaxKind.TrueKeyword,
@@ -1751,8 +1752,8 @@ namespace ts {
 
     function getSynthesizedDeepCloneWorker<T extends Node>(node: T, renameMap?: Map<Identifier>, checker?: TypeChecker, callback?: (originalNode: Node, clone: Node) => any): T {
         const visited = (renameMap || checker || callback) ?
-        visitEachChild(node, wrapper, nullTransformationContext) :
-        visitEachChild(node, getSynthesizedDeepClone, nullTransformationContext);
+            visitEachChild(node, wrapper, nullTransformationContext) :
+            visitEachChild(node, getSynthesizedDeepClone, nullTransformationContext);
 
         if (visited === node) {
             // This only happens for leaf nodes - internal nodes always see their children change.