Method IsNone

lua.go:1521–1521

IsNone verifies that the value at index is not valid. http://www.lua.org/manual/5.2/manual.html#lua_isnone

(index int)

//
// http://www.lua.org/manual/5.2/manual.html#lua_isnone
func (l *State) IsNone(index int) bool { return l.TypeOf(index) == TypeNone }

// IsNoneOrNil verifies that the value at index is either nil or invalid.
//