diff --git a/include/snipplib/concepts/snplib_concepts.h b/include/snipplib/concepts/snplib_concepts.h
index 85caeba..fde448d 100644
--- a/include/snipplib/concepts/snplib_concepts.h
+++ b/include/snipplib/concepts/snplib_concepts.h
@@ -4,7 +4,6 @@
 #include <concepts>
 #include <coroutine>
 #include <expected>
-#include <future>
 #include <ranges>
 
 namespace snplib
@@ -100,6 +99,12 @@ static constexpr bool snplib_check_indices_v = snplib_check_indices_t<T>::value;
 template <typename T>
 concept snplib_tuple_like_c = details::snplib_check_indices_v<std::remove_cvref_t<T>>;
 
+// strictly std::tuple
+template <typename T>
+concept snplib_tuple_c = requires {
+    []<typename... Ts>(std::type_identity<std::tuple<Ts...>>) {}(std::type_identity<std::remove_cvref_t<T>>{});
+};
+
 
 /*                          fixed-size and non-resizable ranges                         */
 
diff --git a/include/snipplib/containers/snplib_hvec.h b/include/snipplib/containers/snplib_hvec.h
index b134c28..8211559 100644
--- a/include/snipplib/containers/snplib_hvec.h
+++ b/include/snipplib/containers/snplib_hvec.h
@@ -3,11 +3,46 @@
 
 #include <functional>
 #include <unordered_map>
+#include "snipplib/concepts/snplib_concepts.h"
 
 
 namespace snplib
 {
 
+namespace details
+{
+
+template <typename OT, typename TT, size_t... Is>
+concept snplib_all_func_oper_c = requires(OT obj) { (obj(std::declval<std::tuple_element_t<Is, TT>&>()), ...); };
+
+template <typename OT, typename TT>
+struct snplib_check_all_func_oper_t {
+    static constexpr bool value = false;
+};
+
+template <typename OT, typename TT>
+    requires requires { typename std::tuple_size<TT>::type; }
+struct snplib_check_all_func_oper_t<OT, TT> {
+    static constexpr bool value = []<std::size_t... Is>(std::index_sequence<Is...>) {
+        return snplib_all_func_oper_c<OT, TT, Is...>;
+    }(std::make_index_sequence<std::tuple_size<TT>::value>{});
+};
+
+
+template <typename OT, typename TT>
+static constexpr bool snplib_check_all_func_oper_v = snplib_check_all_func_oper_t<OT, TT>::value;
+
+}  // namespace details
+
+
+template <typename T>
+concept snplib_hvec_visitor_c = requires {
+    requires snplib_tuple_c<typename T::types>;
+
+    requires details::snplib_check_all_func_oper_v<T, typename T::types>;
+};
+
+
 class HeterogenVec
 {
 protected:
@@ -16,7 +51,58 @@ protected:
 
     inline static std::vector<std::function<void(const HeterogenVec*)>> _clearFunc{};
 
+
+    // move: void(from_obj_ptr, to_obj_ptr)
+    inline static std::vector<std::function<void(HeterogenVec*, HeterogenVec*)>> _moveFunc{};
+    // copy: void(const from_obj_ptr, to_obj_ptr)
+    inline static std::vector<std::function<void(const HeterogenVec*, HeterogenVec*)>> _copyFunc{};
+
+
 public:
+    HeterogenVec() = default;
+
+    ~HeterogenVec() = default;
+
+    HeterogenVec(const HeterogenVec& other)
+    {
+        if (&other != this) {
+            for (auto& func : _copyFunc) {
+                func(&other, this);
+            }
+        }
+    }
+
+    HeterogenVec(HeterogenVec&& other)
+    {
+        if (&other != this) {
+            for (auto& func : _moveFunc) {
+                func(&other, this);
+            }
+        }
+    }
+
+    HeterogenVec& operator=(const HeterogenVec& other)
+    {
+        if (&other != this) {
+            for (auto& func : _copyFunc) {
+                func(&other, this);
+            }
+        }
+
+        return *this;
+    }
+
+    HeterogenVec& operator=(HeterogenVec&& other)
+    {
+        if (&other != this) {
+            for (auto& func : _moveFunc) {
+                func(&other, this);
+            }
+        }
+
+        return *this;
+    }
+
     void clear()
     {
         for (auto& func : _clearFunc) {
@@ -26,16 +112,47 @@ public:
 
 
     template <typename VT>
-    void insert(VT&& value)
+    void push(VT&& value)
     {
         using v_t = std::decay_t<VT>;
 
         if (_values<v_t>.empty()) {
-            _clearFunc.emplace_back([](const HeterogenVec* obj) { _values<v_t>[obj].clear(); });
+            _clearFunc.emplace_back([](const HeterogenVec* obj) {
+                // _values<v_t>[obj].clear();
+                _values<v_t>.erase(obj);
+            });
+
+            _moveFunc.emplace_back([](HeterogenVec* from, HeterogenVec* to) {
+                if (_values<v_t>.contains(from)) {
+                    _values<v_t>[to] = std::move(_values<v_t>[from]);
+                }
+            });
+
+            _copyFunc.emplace_back([](HeterogenVec* from, HeterogenVec* to) {
+                if (_values<v_t>.contains(from)) {
+                    _values<v_t>[to] = _values<v_t>[from];
+                }
+            });
         }
 
+
         _values<v_t>[this].push_back(std::forward<VT>(value));
     }
+
+
+    template <snplib_hvec_visitor_c VT>
+    void visit(VT&& visitor)
+    {
+        auto invoke_per_type = [&visitor, this]<typename T>() {
+            for (auto& elem : _values<T>[this]) {
+                visitor(elem);
+            }
+        };
+
+        [&invoke_per_type]<size_t... Is>(std::index_sequence<Is...>) {
+            (invoke_per_type.template operator()<std::tuple_element_t<Is, typename VT::types>>(), ...);
+        }(std::make_index_sequence<std::tuple_size_v<typename VT::types>>{});
+    }
 };
 
 }  // end of namespace snplib
\ No newline at end of file