Laura Kassovic <******@****.***> 1701107622 -0800

	// pointers, usually for alignment."
	var originals []ir.Node
	var walk func(n ir.Node)
	walk = func(n ir.Node) {
		switch n.Op() {
		case ir.OADD:
			n := n.(*ir.BinaryExpr)
			walk(n.X)
			walk(n.Y)
		case ir.OSUB, ir.OANDNOT:
			n := n.(*ir.BinaryExpr)
			walk(n.X)
		case ir.OCONVNOP:
			n := n.(*ir.ConvExpr)
			if n.X.Type().IsUnsafePtr() {

        Object doSomething() { null }
    }

    interface Iface {}

    class Child extends Base implements Serializable, Iface {
        @Nullable
        Object doSomething() { null }
    }

    def "walking type hierarchy happens breadth-first"() {
        def visitor = Mock(Types.TypeVisitor)
        when:
        Types.walkTypeHierarchy(Child, [Object, GroovyObject], visitor)

    private final InstanceMetadataWalker walker;
    private final ImplementationResolver implementationResolver;
    private final Map<Class<? extends Annotation>, PropertyAnnotationHandler> handlers;

    public DefaultPropertyWalker(TypeMetadataStore typeMetadataStore, ImplementationResolver implementationResolver, Collection<PropertyAnnotationHandler> propertyHandlers) {

	if err != nil {
		log.Fatalf("Error compiling regex: %v", err)
	}
	c := collector{regex: regex}
	for _, arg := range args {
		err := filepath.Walk(arg, c.handlePath)
		if err != nil {
			log.Fatalf("Error walking: %v", err)
		}
	}
	sort.Strings(c.dirs)

	if len(*importAliases) > 0 {
		bytes, err := os.ReadFile(*importAliases)
		if err != nil {

	return filenames, nil
}

func walkPkgDirs(dir string, pkgh func(dir string, filenames []string), errh func(args ...any)) {
	w := walker{pkgh, errh}
	w.walk(dir)
}

type walker struct {
	pkgh func(dir string, filenames []string)
	errh func(args ...any)
}

func (w *walker) walk(dir string) {
	files, err := os.ReadDir(dir)
	if err != nil {
		w.errh(err)
		return
	}

}

func walkPkgDirs(dir string, pkgh func(dir string, filenames []string), errh func(args ...interface{})) {
	w := walker{pkgh, errh}
	w.walk(dir)
}

type walker struct {
	pkgh func(dir string, filenames []string)
	errh func(args ...any)
}

func (w *walker) walk(dir string) {
	files, err := os.ReadDir(dir)
	if err != nil {
		w.errh(err)
		return
	}

        0 * _._

        when:
        walker.add(1)
        def values = walker.findValues()

        then:
        values == ['1', '2', '3', '4'] as Set

        when:
        walker.add(2)
        values = walker.findValues()

        then:
        values == ['1', '2', '3', '4'] as Set

        when:
        walker.add(3)
        values = walker.findValues()

        then:

	extraCalls map[*ir.Func][]nowritebarrierrecCall

	// curfn is the current function during AST walks.
	curfn *ir.Func
}

type nowritebarrierrecCall struct {
	target *ir.Func // caller or callee
	lineno src.XPos // line of call
}

// newNowritebarrierrecChecker creates a nowritebarrierrecChecker. It
// must be called before walk.
func newNowritebarrierrecChecker() *nowritebarrierrecChecker {
	c := &nowritebarrierrecChecker{

	// Files and packages
	case *ast.File:
		a.apply(n, "Doc", nil, n.Doc)
		a.apply(n, "Name", nil, n.Name)
		a.applyList(n, "Decls")
		// Don't walk n.Comments; they have either been walked already if
		// they are Doc comments, or they can be easily walked explicitly.

	case *ast.Package:
		// collect and sort names for reproducible behavior
		var names []string
		for name := range n.Files {