Proper deprecation to alert users to API name changes.

sol/state.hpp

@@ -147,6 +147,26 @@ public:
         return *this;
     }
 
+    template<typename T>
+    SOL_DEPRECATED table& set_userdata(usertype<T>& user) {
+        return set_usertype(user);
+    }
+
+    template<typename Key, typename T>
+    SOL_DEPRECATED table& set_userdata(Key&& key, usertype<T>& user) {
+        return set_usertype(std::forward<Key>(key), user);
+    }
+
+    template<typename Class, typename... CTor, typename... Args>
+    SOL_DEPRECATED state& new_userdata(const std::string& name, Args&&... args) {
+        return new_usertype<Class>(name, std::forward<Args>(args)...);
+    }
+
+    template<typename Class, typename... CArgs, typename... Args>
+    SOL_DEPRECATED state& new_userdata(const std::string& name, constructors<CArgs...> ctor, Args&&... args) {
+        return new_usertype(name, std::move(ctor), std::forward<Args>(args)...);
+    }
+
     template<typename T>
     state& set_usertype(usertype<T>& user) {
         return set_usertype(usertype_traits<T>::name, user);

sol/table.hpp

@@ -83,9 +83,19 @@ public:
         return *this;
     }
 
+    template<typename T>
+    SOL_DEPRECATED table& set_userdata(usertype<T>& user) {
+        return set_usertype(user);
+    }
+
+    template<typename Key, typename T>
+    SOL_DEPRECATED table& set_userdata(Key&& key, usertype<T>& user) {
+        return set_usertype(std::forward<Key>(key), user);
+    }
+
     template<typename T>
     table& set_usertype(usertype<T>& user) {
-        return set_userdata(usertype_traits<T>::name, user);
+        return set_usertype(usertype_traits<T>::name, user);
     }
 
     template<typename Key, typename T>

sol/types.hpp

@@ -90,7 +90,7 @@ inline std::string type_name(lua_State*L, type t) {
 }
 
 template<typename T>
-class userdata;
+class usertype;
 class table;
 class function;
 class object;

sol/usertype.hpp

@@ -26,6 +26,7 @@
 #include "function_types.hpp"
 #include "usertype_traits.hpp"
 #include "default_construct.hpp"
+#include "deprecate.hpp"
 #include <vector>
 #include <array>
 #include <algorithm>
@@ -315,6 +316,18 @@ public:
     template<typename... Args>
     usertype(Args&&... args): usertype(default_constructor, std::forward<Args>(args)...) {}
 
+    template<typename... Args>
+    SOL_DEPRECATED usertype(std::string, Args&&... args): usertype(default_constructor, std::forward<Args>(args)...) {}
+
+    template<typename... Args>
+    SOL_DEPRECATED usertype(const char*, Args&&... args): usertype(default_constructor, std::forward<Args>(args)...) {}
+
+    template<typename... Args, typename... CArgs>
+    SOL_DEPRECATED usertype(std::string, constructors<CArgs...> c, Args&&... args) : usertype(std::move(c), std::forward<Args>(args)...) {}
+
+    template<typename... Args, typename... CArgs>
+    SOL_DEPRECATED usertype(const char*, constructors<CArgs...> c, Args&&... args) : usertype(std::move(c), std::forward<Args>(args)...) {}
+
     template<typename... Args, typename... CArgs>
     usertype(constructors<CArgs...>, Args&&... args) {
         functionnames.reserve(sizeof...(args) + 2);
@@ -392,6 +405,9 @@ private:
     }
 };
 
+template <typename T>
+using userdata = typename detail::deprecate_type<usertype<T>>::type;
+
 namespace stack {
 template<typename T>
 struct pusher<usertype<T>> {