}

	var mu sync.Mutex
	have := map[string]bool{
		"builtin": true, // ignore pseudo-package that exists only for documentation
	}
	addPkg := func(p string) {
		mu.Lock()
		m.Pkgs = append(m.Pkgs, p)
		mu.Unlock()
	}
	if !cfg.BuildContext.CgoEnabled {
		have["runtime/cgo"] = true // ignore during walk
	}

	type pruning int8
	const (
		pruneVendor = pruning(1 << iota)
		pruneGoMod
	)

	cmd.Env = append(cmd.Env, "GOOS=linux")
	cmd.Stderr = os.Stderr
	out, err := cmd.Output()
	if err != nil {
		log.Fatalf("loading package list: %v\n%s", err, out)
	}
	pkgs := strings.Split(strings.TrimSpace(string(out)), "\n")

	cmd = exec.Command(testenv.GoToolPath(t), "tool", "dist", "list")
	cmd.Stderr = os.Stderr
	out, err = cmd.Output()
	if err != nil {

		if !info.IsDir() {
			return nil
		}
		pkgs, err := parser.ParseDir(fset, path, isGoFile, parser.ParseComments)
		if err != nil {
			if *verbose {
				fmt.Fprintln(os.Stderr, err)
			}
			return nil
		}
		for _, pkg := range pkgs {
			d := doc.New(pkg, path, doc.Mode(0))
			list := appendHeadings(nil, d.Doc)
			for _, d := range d.Consts {

			}
		}

		mods, err := modload.ListModules(ctx, args, 0, "")
		if err != nil {
			base.Fatal(err)
		}

		byModule := make(map[string][]string)
		_, pkgs := modload.LoadPackages(ctx, loadOpts, "all")
		for _, path := range pkgs {
			m := modload.PackageModule(path)
			if m.Path != "" {
				byModule[m.Path] = append(byModule[m.Path], path)
			}
		}
		sep := ""
		for _, m := range mods {

	"go/token"
	"internal/diff"
	"testing"
)

func TestComment(t *testing.T) {
	fset := token.NewFileSet()
	pkgs, err := parser.ParseDir(fset, "testdata/pkgdoc", nil, parser.ParseComments)
	if err != nil {
		t.Fatal(err)
	}
	if pkgs["pkgdoc"] == nil {
		t.Fatal("missing package pkgdoc")
	}
	pkg := New(pkgs["pkgdoc"], "testdata/pkgdoc", 0)

	var (

}

func (mm *metaMerge) visitPackage(pd *decodemeta.CoverageMetaDataDecoder, pkgIdx uint32, pcombine bool) {
	p, ok := mm.pkm[pd.PackagePath()]
	if !ok {
		p = &pkstate{
			pkgIdx: uint32(len(mm.pkgs)),
		}
		mm.pkgs = append(mm.pkgs, p)
		mm.pkm[pd.PackagePath()] = p
		if pcombine {
			p.pcombinestate = new(pcombinestate)
			cmdb, err := encodemeta.NewCoverageMetaDataBuilder(pd.PackagePath(), pd.PackageName(), pd.ModulePath())

// first error encountered are returned.
func ParseDir(fset *token.FileSet, path string, filter func(fs.FileInfo) bool, mode Mode) (pkgs map[string]*ast.Package, first error) {
	list, err := os.ReadDir(path)
	if err != nil {
		return nil, err
	}

	pkgs = make(map[string]*ast.Package)
	for _, d := range list {
		if d.IsDir() || !strings.HasSuffix(d.Name(), ".go") {
			continue
		}

    private static final Map PROTOCOL_HANDLERS = new HashMap();

    private static final String HANDLER_PKGS_PROPERTY =
            "java.protocol.handler.pkgs";

    /**
     * Vendor-specific default packages.  If no packages are specified in
     * "java.protocol.handler.pkgs", the VM uses one or more default
     * packages, which are vendor specific.  Sun's is included below

func loadTypes(path, pkgName string, v visitor) {
	fset := token.NewFileSet()

	filter := func(fi fs.FileInfo) bool {
		return strings.HasSuffix(fi.Name(), ".go")
	}
	pkgs, err := parser.ParseDir(fset, path, filter, 0)
	if err != nil {
		panic(err)
	}

	pkg := pkgs[pkgName]

	for _, f := range pkg.Files {
		ast.Walk(v, f)
	}
}

func TestMirrorWithReflect(t *testing.T) {

// will always include at least one package.
func (opts *goTest) packages() []string {
	pkgs := opts.pkgs
	if opts.pkg != "" {
		pkgs = append(pkgs[:len(pkgs):len(pkgs)], opts.pkg)
	}
	if len(pkgs) == 0 {
		panic("no packages")
	}
	return pkgs
}

// printSkip prints a skip message for all of goTest.
func (opts *goTest) printSkip(t *tester, msg string) {
	if t.json {