Code the following described function using the C++ programming language:

/** * Performs an index-based binary search on an indexable object for a given value, by using * operator[]. * * @param haystack the object to search. Must support operator[] and size(), e.g. a std::vector. * @param needle the value for which to search * @return the first index found via binary search at which the object contains the value, or -1 if * the object does not contain the value. */ template int BinarySearch(const IndexedContainer &haystack, const Value &needle)