Golang function pointer as a part of a struct

Question

I have the following code:

type FWriter struct {
    WriteF func(p []byte) (n int,err error)
}

func (self *FWriter) Write(p []byte) (n int, err error) {
    ret         


        

Answer 1

Fix MyWriterFunction/MyWriteFunction typo. For example,

package main

import (
    "fmt"
    "io"
    "os"
)

type FWriter struct {
    WriteF func(p []byte) (n int, err error)
}

func (self *FWriter) Write(p []byte) (n int, err error) {
    return self.WriteF(p)
}

func MyWriteFunction(p []byte) (n int, err error) {
    // this function implements the Writer interface but is not named "Write"
    fmt.Print("%v", p)
    return len(p), nil
}

func main() {
    MyFWriter := new(FWriter)
    MyFWriter.WriteF = MyWriteFunction
    // I want to use MyWriteFunction with io.Copy
    io.Copy(MyFWriter, os.Stdin)
}