goconfig/validate.go at master · fulldump/goconfig · GitHub

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package goconfig

import (
	"errors"
	"reflect"
)

func validateConfigTarget(c interface{}) error {
	if c == nil {
		return errors.New("config target cannot be nil")
	}

	v := reflect.ValueOf(c)
	if v.Kind() != reflect.Ptr {
		return errors.New("config target must be a pointer")
	}

	if v.IsNil() {
		return errors.New("config target cannot be nil")
	}

	v = reflect.Indirect(v)
	if v.Kind() == reflect.Ptr {
		v = reflect.Indirect(v)
	}
	if v.Kind() != reflect.Struct {
		return errors.New("config target must point to a struct")
	}

	return nil
}