Class ArrayLiteral

rhino/src/main/java/org/mozilla/javascript/ast/ArrayLiteral.java:31–185

AST node for an Array literal. The elements list will always be non-null, although the list will have no elements if the Array literal is empty. Node type is Token#ARRAYLIT. ArrayLiteral : [ Elisionopt ] [ ElementList ]

 *        Elision <b>,</b></pre>
 */
public class ArrayLiteral extends AstNode implements DestructuringForm {

    private static final List<AstNode> NO_ELEMS = Collections.unmodifiableList(new ArrayList<>());

    private List<AstNode> elements;
    private int destructuringLength;
    private int skipCount;
    private boolean isDestructuring;

    {
        type = Token.ARRAYLIT;
    }

    public ArrayLiteral() {}

    public ArrayLiteral(int pos) {
        super(pos);
    }

    public ArrayLiteral(int pos, int len) {
        super(pos, len);
    }

    /**
     * Returns the element list
     *
     * @return the element list. If there are no elements, returns an immutable empty list. Elisions
     *     are represented as {@link EmptyExpression} nodes.
     */
    public List<AstNode> getElements() {
        return elements != null ? elements : NO_ELEMS;
    }

    /**
     * Sets the element list, and sets each element's parent to this node.
     *
     * @param elements the element list. Can be {@code null}.
     */
    public void setElements(List<AstNode> elements) {
        if (elements == null) {
            this.elements = null;
        } else {
            if (this.elements != null) this.elements.clear();
            for (AstNode e : elements) addElement(e);
        }
    }

    /**
     * Adds an element to the list, and sets its parent to this node.
     *
     * @param element the element to add
     * @throws IllegalArgumentException if element is {@code null}. To indicate an empty element,
     *     use an {@link EmptyExpression} node.
     */
    public void addElement(AstNode element) {
        assertNotNull(element);
        if (elements == null) elements = new ArrayList<>();
        elements.add(element);