writer.go•1.12 kB
// Copyright 2015 The Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package markdown
import (
"bufio"
"io"
)
type writer interface {
Write([]byte) (int, error)
WriteByte(byte) error
WriteString(string) (int, error)
Flush() error
}
type monadicWriter struct {
writer
err error
}
func newMonadicWriter(w io.Writer) *monadicWriter {
if w, ok := w.(writer); ok {
return &monadicWriter{writer: w}
}
return &monadicWriter{writer: bufio.NewWriter(w)}
}
func (w *monadicWriter) Write(p []byte) (n int, err error) {
if w.err != nil {
return
}
n, err = w.writer.Write(p)
w.err = err
return
}
func (w *monadicWriter) WriteByte(b byte) (err error) {
if w.err != nil {
return
}
err = w.writer.WriteByte(b)
w.err = err
return
}
func (w *monadicWriter) WriteString(s string) (n int, err error) {
if w.err != nil {
return
}
n, err = w.writer.WriteString(s)
w.err = err
return
}
func (w *monadicWriter) Flush() (err error) {
if w.err != nil {
return
}
err = w.writer.Flush()
w.err = err
return
}