Let's say I am iterating over a std::vector of std::pairs like this:
for (const auto& [one, two] : pairs)
{
std::cout << one << two;
}
What was the language mechanism called that allowed to "alias" std::pair::first to user defined identifiers like one? There was also an article on cppreference about that, but I can't find it because I can't remember what it's called!
