I'm trying to copy a map into a vector of pair, so I can then sort the vector by the second data member of the pairs. I have resolved this doing like this:
Is there any reason that std::deque's pop_front() and pop_back() are not noexcept in C++11 and higher or was that just forgotten?
As I am beginning to take advantage of the C++17 structured bindings and if operator init statements for more elegant function result reporting and checking, I started doing the following, if accordance with C++ Core Guideline F21:
C++14 final working draft makes the following comment about std::vector:Storage management is handled automatically, though hints can be given to improve efficiency.
NOTE: This is a c question, though I added c++ in case some C++ expert can provide a rationale or historical reason why C++ is using a different wording than C.
Is there in standard library an utility to get index of given type from std::variant, or should I make one for myself? That is, I want to get the index of B in variant<A, B, C> and have that return 1.
I want to work out how to use old style pointer arithmetic on pointers to elements of the std::array class. The following code (unsurprisingly perhaps) does not compile:
I want to use a map to store key-value pairs.The key of the map should contain information about the coordinates(int) of one point.