42     std::stack stk(v);  in main()
44     static_assert(std::is_same_v<decltype(stk), std::stack<int, std::vector<int>>>, "");  in main()
51     std::stack stk(l, test_allocator<long>(0,2)); // different allocator  in main()
68     std::stack<A> source;  in main()
69     std::stack stk(source); // stack(stack &)  in main()
85         std::stack stk(cont, Alloc(2));  in main()
86         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
91         std::stack stk(cont, ConvertibleToAlloc(2));  in main()
92         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
97         std::stack stk(std::move(cont), Alloc(2));  in main()
98         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
103         std::stack stk(std::move(cont), ConvertibleToAlloc(2));  in main()
104         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
117         std::stack<T, Cont> source;  in main()
118         std::stack stk(source, Alloc(2));  in main()
119         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
123         std::stack<T, Cont> source;  in main()
124         std::stack stk(source, ConvertibleToAlloc(2));  in main()
125         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
129         std::stack<T, Cont> source;  in main()
130         std::stack stk(std::move(source), Alloc(2));  in main()
131         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
135         std::stack<T, Cont> source;  in main()
136         std::stack stk(std::move(source), ConvertibleToAlloc(2));  in main()
137         static_assert(std::is_same_v<decltype(stk), std::stack<T, Cont>>);  in main()
154         static_assert(SFINAEs_away<std::stack, Alloc, Alloc>);  in main()
155         static_assert(SFINAEs_away<std::stack, Cont, NotAlloc>);  in main()
156         static_assert(SFINAEs_away<std::stack, Cont, DiffAlloc>);  in main()
157         static_assert(SFINAEs_away<std::stack, Iter, NotIter>);  in main()
159         static_assert(SFINAEs_away<std::stack, Iter, NotIter, Alloc>);  in main()
160         static_assert(SFINAEs_away<std::stack, Iter, Iter, NotAlloc>);  in main()
170         std::stack s(a.begin(), a.end());  in main()
171         static_assert(std::is_same_v<decltype(s), std::stack<T>>);  in main()
174         std::stack s(a.begin(), a.end(), Alloc());  in main()
175         static_assert(std::is_same_v<decltype(s), std::stack<T, std::deque<T, Alloc>>>);  in main()