String includes = '**/*.groovy **/*.java'

    void findSamples(String dir, Closure runner) {
        def sources = findDir(dir)
        def ant = new AntBuilder()

        def list = ant.fileScanner {
            fileset(dir: sources, includes: includes)
        }

        list.each() { runSamplesFromFile(it, runner) }
    }

    static String findDir(String dir) {
        def workDir = SystemProperties.instance.currentDir

type ShortPosition struct {
	Line    int
	Column  int
	Visited bool
}

type IdentPositionInfo map[string][]ShortPosition

type Visitor struct {
	identPosInfo IdentPositionInfo
	fset         *token.FileSet
	t            *testing.T
}

func (v *Visitor) Visit(node ast.Node) ast.Visitor {
	if ident, ok := node.(*ast.Ident); ok {
		if expectedPositions, ok := v.identPosInfo[ident.Name]; ok {
			gotMatch := false

			b.Fatal(err)
		}
	}
	b.StopTimer()
	b.ReportMetric(float64(lines)*float64(b.N)/time.Since(start).Seconds(), "lines/s")
}

func pkgFiles(fset *token.FileSet, path string) ([]*ast.File, error) {
	filenames, err := pkgFilenames(path, true) // from stdlib_test.go
	if err != nil {
		return nil, err
	}

	var files []*ast.File
	for _, filename := range filenames {

		pkg, err := imp.Import(thePackage)
		if err != nil {
			t.Fatal(err)
		}
		if pkg.Path() != thePackage {
			t.Fatalf("Path() = %q, want %q", pkg.Path(), thePackage)
		}

		// Check that the fileset positions are accurate.
		// https://github.com/golang/go#28995
		mathBigInt := pkg.Scope().Lookup("Int")
		posn := fset.Position(mathBigInt.Pos()) // "$GOROOT/src/math/big/int.go:25:1"

package fib

type S string

var a, b, c = len(b), S(c), "hello"

func fib(x int) int {
	if x < 2 {
		return x
	}
	return fib(x-1) - fib(x-2)
}`
	// We need a specific fileset in this test below for positions.
	// Cannot use typecheck helper.
	fset := token.NewFileSet()
	f := mustParse(fset, input)

	// Type-check the package.
	// We create an empty map for each kind of input

	"strings"
	"sync"
	_ "unsafe" // for go:linkname
)

// An Importer provides the context for importing packages from source code.
type Importer struct {
	ctxt     *build.Context
	fset     *token.FileSet
	sizes    types.Sizes
	packages map[string]*types.Package
}

// New returns a new Importer for the given context, file set, and map
// of packages. The context is used to resolve import paths to package paths,

//
// The function may return early (before the entire result is written)
// and return a formatting error, for instance due to an incorrect AST.
func Node(dst io.Writer, fset *token.FileSet, node any) error {
	// Determine if we have a complete source file (file != nil).
	var file *ast.File
	var cnode *printer.CommentedNode
	switch n := node.(type) {
	case *ast.File:
		file = n

	//       }
	//       return cmp.Compare(a.End(), b.End())
	// })

	return list
}

// A commentListReader helps iterating through a list of comment groups.
type commentListReader struct {
	fset     *token.FileSet
	list     []*CommentGroup
	index    int
	comment  *CommentGroup  // comment group at current index
	pos, end token.Position // source interval of comment group at current index
}

	ngo     = flag.Int("n", runtime.NumCPU(), "number of goroutines used")
	verbose = flag.Bool("verbose", false, "verbose mode")
	nfiles  int // number of files processed
)

func gofmt(fset *token.FileSet, filename string, src *bytes.Buffer) error {
	f, _, _, err := parse(fset, filename, src.Bytes(), false)
	if err != nil {
		return err
	}
	ast.SortImports(fset, f)
	src.Reset()

// We use -64 because it is rare; see issue 20080 and CL 41619.
// -64 is the smallest int that fits in a single byte as a varint.
const deltaNewFile = -64

// Synthesize a token.Pos
type fakeFileSet struct {
	fset  *token.FileSet
	files map[string]*fileInfo
}

type fileInfo struct {
	file     *token.File
	lastline int
}

const maxlines = 64 * 1024

func (s *fakeFileSet) pos(file string, line, column int) token.Pos {