Interface Error

error.go:40–50

Error is an interface implemented by all Dig errors. Use this interface, in conjunction with [RootCause], in order to determine if errors you encounter come from Dig, or if they come from provided constructors or invoked functions. See [RootCause] for more info.

// from provided constructors or invoked functions. See [RootCause]
// for more info.
type Error interface {
	error

	// Writes the message or context for this error in the chain.
	//
	// Note: the Error interface must always have a private function
	// such as this one in order to maintain properly sealed.
	//
	// verb is either %v or %+v.
	writeMessage(w io.Writer, v string)
}

// a digError is a dig.Error with additional functionality for
// internal use - namely the ability to be formatted.