/**
 * A {@link Reader} that concatenates multiple readers.
 *
 * @author Bin Zhu
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
final class MultiReader extends Reader {
  private final Iterator<? extends CharSource> it;
  private @Nullable Reader current;

  MultiReader(Iterator<? extends CharSource> readers) throws IOException {
    this.it = readers;
    advance();
  }

    ConcatenatedCharSource(Iterable<? extends CharSource> sources) {
      this.sources = checkNotNull(sources);
    }

    @Override
    public Reader openStream() throws IOException {
      return new MultiReader(sources.iterator());
    }

    @Override
    public boolean isEmpty() throws IOException {
      for (CharSource source : sources) {
        if (!source.isEmpty()) {
          return false;
        }

    ConcatenatedCharSource(Iterable<? extends CharSource> sources) {
      this.sources = checkNotNull(sources);
    }

    @Override
    public Reader openStream() throws IOException {
      return new MultiReader(sources.iterator());
    }

    @Override
    public boolean isEmpty() throws IOException {
      for (CharSource source : sources) {
        if (!source.isEmpty()) {
          return false;
        }

	}
}

func TestReadZero(t *testing.T) {
	for _, size := range []int{100, 2} {
		t.Run(fmt.Sprintf("bufsize=%d", size), func(t *testing.T) {
			r := io.MultiReader(strings.NewReader("abc"), &emptyThenNonEmptyReader{r: strings.NewReader("def"), n: 1})
			br := NewReaderSize(r, size)
			want := func(s string, wantErr error) {
				p := make([]byte, 50)
				n, err := br.Read(p)

		cumulativeSum := int64(0)
		for _, p := range oi.partLengths {
			readers = append(readers, NewDummyDataGen(p, cumulativeSum))
			cumulativeSum += p
		}

		refReader := io.LimitReader(ioutilx.NewSkipReader(io.MultiReader(readers...), off), length)
		if ok, msg := cmpReaders(refReader, rec.Body); !ok {
			t.Fatalf("(%s) Object: %s Case %d ByteRange: %s --> data mismatch! (msg: %s)", instanceType, oi.objectName, i+1, byteRange, msg)
		}
	}

t.Cleanup(func() { testingOnlyRejection = nil }) var loopCount int testingOnlyRejection = func() { loopCount++ } // A sequence of all ones will generate 2^N-1, which should be rejected. // (Unless, for example, we are masking too many bits.) r := io.MultiReader(bytes.NewReader(bytes.Repeat([]byte{0xff}, 100)), rand.Reader) if k, p, err := randomPoint(c, func(b []byte) error { _, err := r.Read(b) return err }); err != nil { t.Fatal(err) } else if k.IsZero() == 1 { t.Error("k is zero") } else if p.Bytes()[0]...

pkg index/suffixarray, type Index struct
pkg io, func Copy(Writer, Reader) (int64, error)
pkg io, func CopyN(Writer, Reader, int64) (int64, error)
pkg io, func LimitReader(Reader, int64) Reader
pkg io, func MultiReader(...Reader) Reader
pkg io, func MultiWriter(...Writer) Writer
pkg io, func NewSectionReader(ReaderAt, int64, int64) *SectionReader
pkg io, func Pipe() (*PipeReader, *PipeWriter)