1 files changed, 4 insertions, 0 deletions
diff --git a/libgo/go/io/io.go b/libgo/go/io/io.go
index 9cc3086..3dea70b 100644
--- a/libgo/go/io/io.go
+++ b/libgo/go/io/io.go
@@ -236,6 +236,10 @@ type WriterAt interface {
 // ReadByte reads and returns the next byte from the input or
 // any error encountered. If ReadByte returns an error, no input
 // byte was consumed, and the returned byte value is undefined.
+//
+// ReadByte provides an efficient interface for byte-at-time
+// processing. A Reader that does not implement  ByteReader
+// can be wrapped using bufio.NewReader to add this method.
 type ByteReader interface {
 	ReadByte() (byte, error)
 }