Make tokenToString return string|undefined (#16106)

ajafff · mhegazy · commit e8f42c4a7bf1 · 2017-06-02T10:09:36.000-07:00
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
@@ -286,7 +286,7 @@ namespace ts {
 
     const tokenStrings = makeReverseMap(textToToken);
 
-    export function tokenToString(t: SyntaxKind): string {
+    export function tokenToString(t: SyntaxKind): string | undefined {
         return tokenStrings[t];
     }
 

Original file line number	Diff line number	Diff line change
`@@ -286,7 +286,7 @@ namespace ts {`
`286`	`286`
`287`	`287`	`const tokenStrings = makeReverseMap(textToToken);`
`288`	`288`
`289`		`- export function tokenToString(t: SyntaxKind): string {`
	`289`	`+ export function tokenToString(t: SyntaxKind): string \| undefined {`
`290`	`290`	`return tokenStrings[t];`
`291`	`291`	`}`
`292`	`292`