typedef ByteScanner

ByteScanner is the interface that adds the UnreadByte method to the basic ReadByte method.

UnreadByte causes the next call to ReadByte to return the last byte read. If the last operation was not a successful call to ReadByte, UnreadByte may return an error, unread the last byte read (or the byte prior to the last-unread byte), or (in implementations that support the Seeker interface) seek to one byte before the current offset.

See also:

• https://pkg.go.dev/io/#ByteScanner