View source for cpp/memory/allocator/allocate at least

===Example===
{{example
|code=
#include <memory>
#include <print>

int main()
{
    const std::size_t count{69};
    std::allocator<int> alloc;
    std::allocation_result res{alloc.allocate_at_least(count)};
    std::print("count: {}\n"
               "res.ptr: {}\n"
               "res.count: {}\n", count, res.ptr, res.count);

    /* construct, use, then destroy elements */

    alloc.deallocate(res.ptr, res.count);
}
|p=true
|output=
count: 69
res.ptr: 0x555a486a0960
res.count: 96
}}