refactor(guardString): add guard for primitive String object

Author: sciborrudnicki

packages/type/src/guard/lib/guard-string.func.ts

@@ -1,13 +1,14 @@
 // Function.
 import { isString } from '../../is/lib/is-string.func';
 // Type.
+import { AnyString } from '../../type/any-string.type';
 import { GuardString } from '../type/guard-string.type';
 import { ResultCallback } from '../../type/result-callback.type';
 /**
- * Guard the `value` to be a `string`.
- * @param value A `string` type `value` to guard.
- * @param callback Optional `ResultCallback` function to handle result before returns.
- * @returns A `boolean` indicating whether or not the `value` is a `string`.
+ * Guard the `value` to be any type of a string.
+ * @param value An `AnyString` type `value` to guard.
+ * @param callback An Optional `ResultCallback` function to handle result before returns.
+ * @returns A `boolean` indicating whether or not the `value` is a `string` type or `String` object.
  */
-export const guardString: GuardString = (value: string, callback?: ResultCallback): value is string =>
+export const guardString: GuardString = <S extends AnyString>(value: S, callback?: ResultCallback): value is S =>
   isString(value, callback);

packages/type/src/guard/type/guard-string.type.ts

@@ -1,2 +1,3 @@
+import { AnyString } from '../../type/any-string.type';
 import { ResultCallback } from '../../type/result-callback.type';
-export type GuardString = (value: string, callback?: ResultCallback) => value is string;
+export type GuardString = <S extends AnyString>(value: S, callback?: ResultCallback) => value is S;