Function Where

auxiliary.go:190–199

Where pushes onto the stack a string identifying the current position of the control at level in the call stack. Typically this string has the following format: chunkname:currentline: Level 0 is the running function, level 1 is the function that called the running function, etc. This function is us

(l *State, level int)

//
// This function is used to build a prefix for error messages.
func Where(l *State, level int) {
	if f, ok := Stack(l, level); ok { // check function at level
		ar, _ := Info(l, "Sl", f) // get info about it
		if ar.CurrentLine > 0 {   // is there info?
			l.PushString(fmt.Sprintf("%s:%d: ", ar.ShortSource, ar.CurrentLine))
			return
		}
	}
	l.PushString("") // else, no information available...
}

// Errorf raises an error. The error message format is given by format plus
// any extra arguments, following the same rules as PushFString. It also adds