Chore: follow up #2

Author: mysticatea

README.md

@@ -35,7 +35,7 @@ Parse a given regular expression literal then make AST object.
 This is equivalent to `new RegExpParser(options).parseLiteral(source)`.
 
 - **Parameters:**
-    - `source` (`string`) The source code to parse.
+    - `source` (`string | RegExp`) The source code to parse.
     - `options?` ([`RegExpParser.Options`]) The options to parse.
 - **Return:**
     - The AST of the regular expression.

src/index.ts

@@ -15,7 +15,7 @@ export function parseRegExpLiteral(
     source: string | RegExp,
     options?: RegExpParser.Options,
 ): AST.RegExpLiteral {
-    return new RegExpParser(options).parseLiteral(source instanceof RegExp ? String(source) : source)
+    return new RegExpParser(options).parseLiteral(String(source))
 }
 
 /**

test/parser.ts

@@ -50,6 +50,13 @@ describe("parseRegExpLiteral function:", () => {
             }
         })
     }
+
+    it("should parse RegExp object", () => {
+        const actual = cloneWithoutCircular(parseRegExpLiteral(/[A-Z]+/))
+        const expected = cloneWithoutCircular(parseRegExpLiteral("/[A-Z]+/"))
+
+        assert.deepStrictEqual(actual, expected)
+    })
 })
 
 for (const filename of Object.keys(Fixtures)) {