UnreadRunes implemented
This commit is contained in:
parent
d60096e5b2
commit
3ca76e7670
27
reader.go
27
reader.go
@ -58,6 +58,22 @@ func (r *Reader) PeekRune() (rune, error) {
|
||||
return rn, nil
|
||||
}
|
||||
|
||||
// String returns the next len runes in r as a string.
|
||||
// If an error occurs, both the already read string and the error will be returned
|
||||
func (r *Reader) String(len int) (string, error) {
|
||||
str := ""
|
||||
|
||||
for i := 0; i < len; i++ {
|
||||
rn, err := r.Rune()
|
||||
if err != nil {
|
||||
return str, err
|
||||
}
|
||||
str += string(rn)
|
||||
}
|
||||
|
||||
return str, nil
|
||||
}
|
||||
|
||||
// UnreadRune unreads the last rune.
|
||||
// The next read will include the unread rune.
|
||||
// It returns ErrNothingToUnread if there wasn't any read yet
|
||||
@ -92,6 +108,17 @@ func (r *Reader) UnreadString(str string) error {
|
||||
return r.UnreadRune()
|
||||
}
|
||||
|
||||
// UnreadRunes calls UnreadRune n times
|
||||
func (r *Reader) UnreadRunes(n int) error {
|
||||
for i := 0; i < n; i++ {
|
||||
err := r.UnreadRune()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// StringWhile reads runes and calls f for each one.
|
||||
// It returns all runes as a string for which f returned true.
|
||||
// It stops when f returns false or an error occured.
|
||||
|
Loading…
Reference in New Issue
Block a user