Say I have an std::map type which for example is defined as follows.
std::map<int, int>* someMap;
If I weren't using a pointer, I could simply add an element using the index operator. However in this case, since I have a pointer, would the following be the correct way to insert using the index operator.
(*someMap)[someIndex] = someValue;
Yes. The operator [] is overloaded for the Map class. It has to be used directly with the object.
Make sure you point someMap at something. Otherwise, its just contains a meaningless address derived from garbage on the stack. Here's an example allocating from the heap:
std::map<int, int>* someMap = new std::map<int, int>();
and once thats done, yes, you are correct in how to use it:
(*someMap)[someIndex] = someValue;
and be sure to cleanup after yourself
delete someMap;
Yes, your code is fine:
(*someMap)[someIndex] = someValue;
somemap->[someIndex] = someValue? Why it should be directly called with object restricting the pointer?