func (fs *fileStat) ModTime() time.Time { return fs.modTime }
func (fs *fileStat) Sys() any           { return &fs.sys }

func sameFile(fs1, fs2 *fileStat) bool {
	return fs1.sys.Dev == fs2.sys.Dev && fs1.sys.Ino == fs2.sys.Ino

func (fs *fileStat) Mode() FileMode     { return fs.mode }
func (fs *fileStat) ModTime() time.Time { return fs.modTime }
func (fs *fileStat) Sys() any           { return fs.sys }

func sameFile(fs1, fs2 *fileStat) bool {
	a := fs1.sys.(*syscall.Dir)
	b := fs2.sys.(*syscall.Dir)
	return a.Qid.Path == b.Qid.Path && a.Type == b.Type && a.Dev == b.Dev

// SameFile only applies to results returned by this package's [Stat].
// It returns false in other cases.
func SameFile(fi1, fi2 FileInfo) bool {
	fs1, ok1 := fi1.(*fileStat)
	fs2, ok2 := fi2.(*fileStat)
	if !ok1 || !ok2 {
		return false
	}
	return sameFile(fs1, fs2)

			t1.NumResults() != t2.NumResults() ||
			t1.IsVariadic() != t2.IsVariadic() {
			return false
		}

		fs1 := t1.ParamsResults()
		fs2 := t2.ParamsResults()
		for i, f1 := range fs1 {
			if !identical(f1.Type, fs2[i].Type, flags, assumedEqual) {
				return false
			}
		}
		return true

	case TARRAY:
		if t1.NumElem() != t2.NumElem() {
			return false
		}