Comment by dannas

Can you make the distinction between "centralization" vs "composition" of errors?

Do you mean the fact that there must be some if-statement within the API that reacts to the different errors and sets a flag used by the Err() method?

Is you opinion that "composition of errors" always requires special syntactic elements such as the match statement?

The code from the blog section:

  scanner := bufio.NewScanner(input)
  for scanner.Scan() {
      token := scanner.Text()
      // process token
  }
  if err := scanner.Err(); err != nil {
      // process the error
  }