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io: add ReadRuner

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Put it in the same package as ReadByter.
There is no implementation here for either interface.

R=rsc
CC=golang-dev
https://golang.org/cl/4121051
This commit is contained in:
Rob Pike 2011-02-01 21:09:33 -08:00
parent 8a2d706487
commit 622d729b86
1 changed files with 9 additions and 0 deletions
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9
src/pkg/io/io.go
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@ -158,6 +158,15 @@ type ReadByter interface {
ReadByte() (c byte, err os.Error) ReadByte() (c byte, err os.Error)
} }
// ReadRuner is the interface that wraps the ReadRune method.
//
// ReadRune reads a single UTF-8 encoded Unicode character
// and returns the rune and its size in bytes. If no character is
// available, err will be set.
type ReadRuner interface {
ReadRune() (rune int, size int, err os.Error)
}
// WriteString writes the contents of the string s to w, which accepts an array of bytes. // WriteString writes the contents of the string s to w, which accepts an array of bytes.
func WriteString(w Writer, s string) (n int, err os.Error) { func WriteString(w Writer, s string) (n int, err os.Error) {
return w.Write([]byte(s)) return w.Write([]byte(s))