Wrap object expressions in parentheses if they become children of an …

…arrow function expression (#3540)

src/ast/nodes/ObjectExpression.ts

@@ -272,7 +272,10 @@ export default class ObjectExpression extends NodeBase implements DeoptimizableE
 		{ renderedParentType }: NodeRenderOptions = BLANK
 	) {
 		super.render(code, options);
-		if (renderedParentType === NodeType.ExpressionStatement) {
+		if (
+			renderedParentType === NodeType.ExpressionStatement ||
+			renderedParentType === NodeType.ArrowFunctionExpression
+		) {
 			code.appendRight(this.start, '(');
 			code.prependLeft(this.end, ')');
 		}

test/function/samples/simplify-arrow-expression-with-object/_config.js

@@ -0,0 +1,9 @@
+const assert = require('assert');
+
+module.exports = {
+	description: 'correctly simplifies arrow expressions where the right hand side becomes an object',
+	exports(exports) {
+		assert.deepStrictEqual(exports.conditional(), { x: 42, y: 43 });
+		assert.deepStrictEqual(exports.logical(), { x: 42, y: 43 });
+	}
+};

test/function/samples/simplify-arrow-expression-with-object/main.js

@@ -0,0 +1,2 @@
+export const logical = () => true && { x: 42, y: 43, };
+export const conditional = () => true ? { x: 42, y: 43, } : null;