Class JSFunction

rhino/src/main/java/org/mozilla/javascript/JSFunction.java:11–256

Represents a JavaScript function built upon a a JSDescriptor. All the immutable metadata associated with the function is stored on the descriptor, with only the lexically bound this, the home object required for super calls, and mutable properties held on the function object itself.

 * home object required for super calls, and mutable properties held on the function object itself.
 */
public class JSFunction extends BaseFunction implements ScriptOrFn<JSFunction> {
    private final JSDescriptor<JSFunction> descriptor;
    private final Scriptable lexicalThis;
    private final Scriptable homeObject;

    public JSFunction(
            Context cx,
            VarScope scope,
            JSDescriptor<JSFunction> descriptor,
            Scriptable lexicalThis,
            Scriptable homeObject) {
        this.descriptor = descriptor;
        this.lexicalThis = lexicalThis;
        this.homeObject = homeObject;
        ScriptRuntime.setFunctionProtoAndParent(this, cx, scope, descriptor.isES6Generator());
        if (!descriptor.isShorthand()) {
            setupDefaultPrototype(scope);
        }
    }

    JSFunction(
            VarScope scope,
            JSDescriptor<JSFunction> descriptor,
            Scriptable lexicalThis,
            Scriptable homeObject) {
        this.descriptor = descriptor;
        this.lexicalThis = lexicalThis;
        this.homeObject = homeObject;
        setParentScope(scope);
        setPrototype(ScriptableObject.getFunctionPrototype(scope));
    }

    @Override
    protected void setPrototypeProperty(Object prototype) {
        super.setPrototypeProperty(prototype);
    }

    @Override
    public VarScope getDeclarationScope() {
        return this.getParentScope();
    }

    @Override
    public JSDescriptor<JSFunction> getDescriptor() {
        return descriptor;
    }

    @Override
    final String decompile(int indent, EnumSet<DecompilerFlag> flags) {
        return descriptor.getRawSource();
    }

    public boolean isShorthand() {
        return descriptor.isShorthand();
    }

    public boolean isStrict() {
        return descriptor.isStrict();