According to C++23 draft, there will be a ranges::to() to be implemented.

Constructing containers and strings from ranges with ranges::to(), tagged constructors, insert and assign member functions.
P1206R7

I tested ranges::to() in develop version of clang because current gcc does not support. It works but I found that it has a rather poor performance.

vector<int> v auto vec = views::iota(-10, 10) | views::filter([](int i) {return i>0;}) | ranges::to<vector<int>>();

I think that the main reason is that a new container has to be created every time the view runs. Thus it is reasonable if we could supply a variant ranges::to() which accept a reusable container as a parameter. like ranges::to_container(T container).

There are at least two benefits based on the above thought:

1. The reusable container can avoid unnecessary reallocating ;
2. We can collect different views into a same container;

Since ranges::to() is somehow similar to collect() in rust lang, I found a couterpart of ranges::to_container(T container) there:

a.iter().collect_into(&mut vec);

The collect_into() is what I would like to propose.