diff --git a/CMakeLists.txt b/CMakeLists.txt
index bcf5b9a..255cb20 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(blt-gp VERSION 0.0.4)
+project(blt-gp VERSION 0.0.5)
 
 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)
diff --git a/include/blt/gp/program.h b/include/blt/gp/program.h
index b19a492..de1b584 100644
--- a/include/blt/gp/program.h
+++ b/include/blt/gp/program.h
@@ -30,11 +30,11 @@ namespace blt::gp
     {
     };
     
-    template<typename Return, typename Args>
+    template<typename Return, typename... Args>
     class operation
     {
         public:
-            using function_t = std::function<Return(blt::span<Args>)>;
+            using function_t = std::function<Return(Args...)>;
             
             operation(const operation& copy) = default;
             
@@ -48,19 +48,35 @@ namespace blt::gp
                     func = functor;
                 } else
                 {
-                    func = [&functor](blt::span<Args> args) {
-                        return functor(args);
+                    func = [&functor](Args... args) {
+                        return functor(args...);
                     };
                 }
             }
             
             explicit operation(function_t&& functor): func(std::move(functor))
             {}
+            
+            inline Return operator()(Args... args)
+            {
+                return func(args...);
+            }
+            
+            inline Return operator()(blt::span<void*> args)
+            {
+                
+            }
         
         private:
             function_t func;
     };
     
+    template<typename Return, typename Args>
+    class operations
+    {
+    
+    };
+    
     
 }