Merge branch 'master' of https://github.com/rollup/rollup into sync-bbc952c1

Author: docschina-bot

src/ast/nodes/ArrayPattern.ts

@@ -1,3 +1,5 @@
+import type MagicString from 'magic-string';
+import type { RenderOptions } from '../../utils/renderHelpers';
 import type { HasEffectsContext, InclusionContext } from '../ExecutionContext';
 import type { NodeInteractionAssigned } from '../NodeInteractions';
 import { EMPTY_PATH, type ObjectPath, UnknownInteger, UnknownKey } from '../utils/PathTracker';
@@ -101,6 +103,20 @@ export default class ArrayPattern extends NodeBase implements DeclarationPattern
 		return this.included;
 	}
 
+	render(code: MagicString, options: RenderOptions): void {
+		let removedStart = this.start + 1;
+		for (const element of this.elements) {
+			if (!element) continue;
+			if (element.included) {
+				element.render(code, options);
+				removedStart = element.end;
+			} else {
+				code.remove(removedStart, this.end - 1);
+				break;
+			}
+		}
+	}
+
 	markDeclarationReached(): void {
 		for (const element of this.elements) {
 			(element as DeclarationPatternNode)?.markDeclarationReached();

test/form/samples/tree-shake-un-included-elements-in-array-pattern/_config.js

@@ -0,0 +1,3 @@
+module.exports = defineTest({
+	description: 'tree-shake un-included elements in array pattern'
+});

test/form/samples/tree-shake-un-included-elements-in-array-pattern/_expected.js

@@ -0,0 +1,10 @@
+function useState() {
+	return ['foo', 'bar', 'qux'];
+}
+
+const [foo$1] = useState();
+assert.ok(foo$1);
+
+const [foo, , qux] = useState();
+assert.ok(foo);
+assert.ok(qux);

test/form/samples/tree-shake-un-included-elements-in-array-pattern/main.js

@@ -0,0 +1,2 @@
+import './module1.js';
+import './module2.js';

test/form/samples/tree-shake-un-included-elements-in-array-pattern/module1.js

@@ -0,0 +1,3 @@
+import useState from './module3.js';
+const [foo, , qux] = useState();
+assert.ok(foo);

test/form/samples/tree-shake-un-included-elements-in-array-pattern/module2.js

@@ -0,0 +1,4 @@
+import useState from './module3.js';
+const [foo, , qux] = useState();
+assert.ok(foo);
+assert.ok(qux);

test/form/samples/tree-shake-un-included-elements-in-array-pattern/module3.js

@@ -0,0 +1,3 @@
+export default function useState() {
+	return ['foo', 'bar', 'qux'];
+}