Are nested structured bindings possible?
Assume I have an object of type
std::map<std::string, std::tuple<int, float>> data;
Is it possible to access the element types in a nested way (i.e. when used in ranged for loop) like this
for (auto [str, [my_int, my_float]] : data) /* do something */
Solution 1:
No, it is not possible.
I distinctly remember reading somewhere that nested structured bindings are not allowed for C++17, but they are considering allowing it in a future standard. Can't find the source though.
Solution 2:
No, they aren't possible; but this is:
for (auto&& [key, value] : data) {
auto&& [my_int, my_float] = value;
}
which is close at least.