It's not 75% of the code-base. During the error handling proposals, the Go team analyzed a large corpus of Go, and it turns out people drastically overstate how much error handling contributes to the line count.
func CopyFile(src, dst string) error {
r, err := os.Open(src)
if err != nil {
return err
}
defer r.Close()
w, err := os.Create(dst)
if err != nil {
return err
}
defer w.Close()
if _, err := io.Copy(w, r); err != nil {
return err
}
if err := w.Close(); err != nil {
return err
}
}You could have smaller discrete functions that abstract the handling of each action a little bit and be more reusable, or is that not possible in Go
These shorter functions need to signal their failure somehow, so calling them looks exactly like the example.
if r, err := os.Open(src); err != nil {
return err
}
defer r.Close()