diff options
Diffstat (limited to 'src/bytes')
| -rw-r--r-- | src/bytes/buffer.go | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/bytes/buffer.go b/src/bytes/buffer.go index aff2db5084..190c468162 100644 --- a/src/bytes/buffer.go +++ b/src/bytes/buffer.go @@ -385,13 +385,15 @@ func (b *Buffer) UnreadRune() error { return nil } +var errUnreadByte = errors.New("bytes.Buffer: UnreadByte: previous operation was not a successful read") + // UnreadByte unreads the last byte returned by the most recent successful // read operation that read at least one byte. If a write has happened since // the last read, if the last read returned an error, or if the read read zero // bytes, UnreadByte returns an error. func (b *Buffer) UnreadByte() error { if b.lastRead == opInvalid { - return errors.New("bytes.Buffer: UnreadByte: previous operation was not a successful read") + return errUnreadByte } b.lastRead = opInvalid if b.off > 0 { |