diff --git a/.idea/misc.xml b/.idea/misc.xml
index a04218a..618a927 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -10,6 +10,7 @@
     </libraryRoots>
     <excludeRoots>
       <file path="$PROJECT_DIR$/bin" />
+      <file path="$PROJECT_DIR$/build" />
     </excludeRoots>
   </component>
 </project>
\ No newline at end of file
diff --git a/include/uvcxx/buf.h b/include/uvcxx/buf.h
index b789b01..2ccf119 100644
--- a/include/uvcxx/buf.h
+++ b/include/uvcxx/buf.h
@@ -11,6 +11,8 @@
 
 #include <uv.h>
 
+#include "inner/base.h"
+
 namespace uv {
     namespace inner {
         /**
@@ -21,8 +23,6 @@ namespace uv {
             using self = buf_t;
             using supper = uv_buf_t;
 
-            using raw_t = uv_buf_t;
-
             using base_t = decltype(base);
             using len_t = decltype(len);
 
@@ -81,10 +81,6 @@ namespace uv {
                     this->capacity = len;
                 }
             }
-
-            operator raw_t *() { return this; }
-
-            operator raw_t *() const { return (raw_t *) this; }
         };
     }
 
@@ -92,61 +88,53 @@ namespace uv {
      * This type is a reference type, and all copied objects use the same buffer,
      *     which is not thread-safe.
      */
-    class buf_t {
+    class buf_t : public uvcxx::shared_raw_base_t<inner::buf_t> {
     public:
         using self = buf_t;
+        using supper = uvcxx::shared_raw_base_t<inner::buf_t>;
 
         using raw_t = uv_buf_t;
 
-        buf_t(std::nullptr_t) {}
+        buf_t(std::nullptr_t) : supper(nullptr) {}
 
-        buf_t() : m_raw(std::make_shared<inner::buf_t>()) {}
+        buf_t() : supper(std::make_shared<inner::buf_t>()) {}
 
         template<class Size, typename = typename std::enable_if_t<std::is_integral_v<Size>>>
         explicit buf_t(Size size)
-                : m_raw(std::make_shared<inner::buf_t>(size)) {}
+                : supper(std::make_shared<inner::buf_t>(size)) {}
 
-        explicit operator bool() const { return m_raw && m_raw->operator bool(); }
-
-        void free() { m_raw->free(); }
+        void free() { raw()->free(); }
 
         template<class Size, typename = typename std::enable_if_t<std::is_integral_v<Size>>>
-        void malloc(Size size) { m_raw->malloc(size); }
+        void malloc(Size size) { raw()->malloc(size); }
 
         template<class Size, typename = typename std::enable_if_t<std::is_integral_v<Size>>>
-        void realloc(Size size) { m_raw->realloc(size); }
+        void realloc(Size size) { raw()->realloc(size); }
 
         template<class Size, typename = typename std::enable_if_t<std::is_integral_v<Size>>>
-        void reserve(Size size) { m_raw->reserve(size); }
+        void reserve(Size size) { raw()->reserve(size); }
 
-        char *base() { return m_raw->base; }
+        char *base() { return raw()->base; }
 
         [[nodiscard]]
-        const char *base() const { return m_raw->base; }
+        const char *base() const { return raw()->base; }
 
         [[nodiscard]]
-        size_t len() const { return size_t(m_raw->len); }
+        size_t len() const { return size_t(raw()->len); }
 
         [[nodiscard]]
-        size_t capacity() const { return size_t(m_raw->len); }
+        size_t capacity() const { return size_t(raw()->capacity); }
 
-        char *data() { return m_raw->base; }
+        char *data() { return raw()->base; }
 
         [[nodiscard]]
-        const char *data() const { return m_raw->base; }
+        const char *data() const { return raw()->base; }
 
         [[nodiscard]]
-        size_t size() const { return size_t(m_raw->len); }
+        size_t size() const { return size_t(raw()->len); }
 
         template<class Size, typename = typename std::enable_if_t<std::is_integral_v<Size>>>
-        void resize(Size size) { m_raw->realloc(size); }
-
-        operator raw_t *() { return m_raw.get(); }
-
-        operator raw_t *() const { return m_raw.get(); }
-
-    private:
-        std::shared_ptr<inner::buf_t> m_raw;
+        void resize(Size size) { raw()->realloc(size); }
     };
 }
 
diff --git a/include/uvcxx/inner/base.h b/include/uvcxx/inner/base.h
index 834217e..ca4abd7 100644
--- a/include/uvcxx/inner/base.h
+++ b/include/uvcxx/inner/base.h
@@ -10,8 +10,15 @@
 #include <type_traits>
 
 namespace uvcxx {
+    /**
+     * The base class of all `libuvcxx` wrapper types.
+     * It can be used for type detection in certain scenarios.
+     */
+    class base_t {
+    };
+
     template<typename T>
-    class shared_raw_base_t {
+    class shared_raw_base_t : public base_t {
     public:
         using self = shared_raw_base_t;
         using raw_t = T;
@@ -24,6 +31,7 @@ namespace uvcxx {
 
         operator raw_t *() const { return m_raw.get(); }
 
+    protected:
         raw_t *raw() { return m_raw.get(); }
 
         raw_t *raw() const { return m_raw.get(); }
@@ -51,7 +59,7 @@ namespace uvcxx {
                 : m_raw(std::move(raw)) {}
 
         explicit shared_raw_base_t(borrow_t borrow)
-                : m_raw(std::shared_ptr<raw_t>(borrow.raw, [](T *) {})) {}
+                : m_raw(std::shared_ptr<raw_t>(borrow.raw, [](raw_t *) {})) {}
 
         template<typename K>
         static std::shared_ptr<raw_t> cast_raw(const std::shared_ptr<K> &p) {
@@ -75,7 +83,7 @@ namespace uvcxx {
     };
 
     template<typename T>
-    class inherit_raw_base_t : public T {
+    class inherit_raw_base_t : public base_t, public T {
     public:
         using self = inherit_raw_base_t;
         using raw_t = T;
@@ -84,6 +92,7 @@ namespace uvcxx {
 
         operator raw_t *() const { return const_cast<self *>(this); }
 
+    protected:
         raw_t *raw() { return (raw_t *) (*this); }
 
         raw_t *raw() const { return (raw_t *) (*this); }
@@ -96,7 +105,7 @@ namespace uvcxx {
     };
 
     template<typename T>
-    class extend_raw_base_t : public T {
+    class extend_raw_base_t : public base_t {
     public:
         using self = extend_raw_base_t;
         using raw_t = T;
@@ -105,6 +114,7 @@ namespace uvcxx {
 
         operator raw_t *() const { return const_cast<raw_t *>(&m_raw); }
 
+    protected:
         raw_t *raw() { return (raw_t *) (*this); }
 
         raw_t *raw() const { return (raw_t *) (*this); }
@@ -116,7 +126,7 @@ namespace uvcxx {
         K *raw() const { return (K *) (raw()); }
 
     private:
-        T m_raw{};
+        raw_t m_raw{};
     };
 }
 
diff --git a/include/uvcxx/lib.h b/include/uvcxx/lib.h
index 30f4460..eae6d58 100644
--- a/include/uvcxx/lib.h
+++ b/include/uvcxx/lib.h
@@ -12,15 +12,15 @@
 #include <uv.h>
 
 #include "cxx/except.h"
+#include "inner/base.h"
 
 namespace uv {
     /**
      * This class is not thread-safe.
      */
-    class lib_t {
+    class lib_t : uvcxx::extend_raw_base_t<uv_lib_t> {
     public:
         using self = lib_t;
-        using raw_t = uv_lib_t;
 
         lib_t(const lib_t &) = delete;
 
@@ -87,12 +87,7 @@ namespace uv {
             return func;
         }
 
-        operator raw_t *() { return &m_lib; }
-
-        operator raw_t *() const { return (raw_t *) &m_lib; }
-
     private:
-        uv_lib_t m_lib{};
         bool m_opened{false};
     };
 }