valid

type Error struct {
	// error code num not used at present! all code return 1
	Code int

	// the front define name
	Param string

	// RuleName current error validator name
	RuleName string

	// the struct key name if error on struct field
	Key string

	// error msg if define custom msg will used preferred
	Msg string

	// Type the error type: global error not happened on the detail field , not contain any field info, the Key and param maybe empty
	Type ErrorType

	// CauseErr the real error msg used for log
	CauseErr error
}

type ErrorType int