blob: d615a87dfc55ec4a5400b7679623a39790591c0b [file] [log] [blame]
// +build ignore,OMIT
package main
import (
"encoding/binary"
"io"
"log"
"os"
)
type Gopher struct {
Name string
AgeYears int
}
// Example of bad code, missing early return. OMIT
func (g *Gopher) WriteTo(w io.Writer) (size int64, err error) {
err = binary.Write(w, binary.LittleEndian, int32(len(g.Name)))
if err == nil {
size += 4
var n int
n, err = w.Write([]byte(g.Name))
size += int64(n)
if err == nil {
err = binary.Write(w, binary.LittleEndian, int64(g.AgeYears))
if err == nil {
size += 4
}
return
}
return
}
return
}
func main() {
g := &Gopher{
Name: "Gophertiti",
AgeYears: 3382,
}
if _, err := g.WriteTo(os.Stdout); err != nil {
log.Printf("DumpBinary: %v\n", err)
}
}
// Example of bad API, it's better to use an interface.
func (g *Gopher) WriteToFile(f *os.File) (int64, error) {
return 0, nil
}
// Example of bad API, it's better to use a narrower interface.
func (g *Gopher) WriteToReadWriter(rw io.ReadWriter) (int64, error) {
return 0, nil
}
// Example of better API.
func (g *Gopher) WriteToWriter(f io.Writer) (int64, error) {
return 0, nil
}