feat(token): improve type inference

TomokiMiyauci · TomokiMiyauci · commit a2b87b9a4759 · 2023-04-29T10:56:27.000+09:00
diff --git a/token.ts b/token.ts
@@ -79,7 +79,7 @@ const reToken = /^[\w!#$%&'*+.^`|~-]+$/;
  * assertFalse(isToken(""));
  * ```
  */
-export function isToken(input: string): boolean {
+export function isToken(input: string): input is `${Tchar}${string}` {
   return reToken.test(input);
 }
 

Original file line number	Diff line number	Diff line change
@@ -79,7 +79,7 @@ const reToken = /^[\w!#$%&'*+.^`\|~-]+$/;
`79`	`79`	`* assertFalse(isToken(""));`
`80`	`80`	* ```
`81`	`81`	`*/`
`82`		`-export function isToken(input: string): boolean {`
	`82`	+export function isToken(input: string): input is `${Tchar}${string}` {
`83`	`83`	`return reToken.test(input);`
`84`	`84`	`}`
`85`	`85`