exo/errors.go

package main

import (
	"strings"
)

const (
	E_Ok int = iota
	E_No_Data
	E_No_DB
    E_No_Port
)

type errorGroup []error

func (e errorGroup) Error() string {
	messages := make([]string, 0, len(e))
	for i, _ := range e {
		messages[i] = e[i].Error()
	}
	return strings.Join(messages, " && ")
}

func (g *errorGroup) AddError(err error) {
	if err == nil {
		return
	}
	if g == nil {
		panic("fart")
		*g = make([]error, 0, 4)
	}
	*g = append(*g, err)
}