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bufio: remove special error type, update docs

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Updates #2836.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5639045
This commit is contained in:
Rob Pike 2012-02-07 16:15:03 +11:00
parent eb039a8045
commit 38b8f6c7a4
1 changed files with 10 additions and 13 deletions
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23
src/pkg/bufio/bufio.go
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@ -9,6 +9,7 @@ package bufio
import (
"bytes"
"errors"
"io"
"strconv"
"unicode/utf8"
@ -18,19 +19,12 @@ const (
defaultBufSize = 4096
)
// Errors introduced by this package.
type Error struct {
ErrorString string
}
func (err *Error) Error() string { return err.ErrorString }
var (
ErrInvalidUnreadByte error = &Error{"bufio: invalid use of UnreadByte"}
ErrInvalidUnreadRune error = &Error{"bufio: invalid use of UnreadRune"}
ErrBufferFull error = &Error{"bufio: buffer full"}
ErrNegativeCount error = &Error{"bufio: negative count"}
errInternal error = &Error{"bufio: internal error"}
ErrInvalidUnreadByte = errors.New("bufio: invalid use of UnreadByte")
ErrInvalidUnreadRune = errors.New("bufio: invalid use of UnreadRune")
ErrBufferFull = errors.New("bufio: buffer full")
ErrNegativeCount = errors.New("bufio: negative count")
errInternal = errors.New("bufio: internal error")
)
// BufSizeError is the error representing an invalid buffer size.
@ -208,7 +202,8 @@ func (b *Reader) UnreadByte() error {
}
// ReadRune reads a single UTF-8 encoded Unicode character and returns the
// rune and its size in bytes.
// rune and its size in bytes. If the encoded rune is invalid, it consumes one byte
// and returns unicode.ReplacementChar (U+FFFD) with a size of 1.
func (b *Reader) ReadRune() (r rune, size int, err error) {
for b.r+utf8.UTFMax > b.w && !utf8.FullRune(b.buf[b.r:b.w]) && b.err == nil {
b.fill()
@ -392,6 +387,8 @@ func (b *Reader) ReadString(delim byte) (line string, err error) {
// buffered output
// Writer implements buffering for an io.Writer object.
// If an error occurs writing to a Writer, no more data will be
// accepted and all subsequent writes will return the error.
type Writer struct {
err error
buf []byte