A minor change to avoid compiler errors when serializing mlp objects.

dlib/mlp/mlp_kernel_1.h

@@ -287,6 +287,48 @@ namespace dlib
         friend void serialize (
             const mlp_kernel_1& item, 
             std::ostream& out
+        );
+
+        friend void deserialize (
+            mlp_kernel_1& item, 
+            std::istream& in
+        );
+
+    private:
+
+        long input_nodes;
+        long first_hidden_nodes;
+        long second_hidden_nodes;
+        long output_nodes;
+        double alpha;
+        double momentum;
+
+        matrix<double> w1;
+        matrix<double> w2;
+        matrix<double> w3;
+
+        matrix<double> w1m;
+        matrix<double> w2m;
+        matrix<double> w3m;
+
+
+        rand rand_nums;
+
+        // temporary storage
+        mutable matrix<double> e1, e2, e3;
+        mutable matrix<double> z, tmp1, tmp2, o;
+    };   
+
+    inline void swap (
+        mlp_kernel_1& a, 
+        mlp_kernel_1& b 
+    ) { a.swap(b); }   
+
+// ----------------------------------------------------------------------------------------
+
+    inline void serialize (
+        const mlp_kernel_1& item, 
+        std::ostream& out
     )   
     {
         try
@@ -312,7 +354,7 @@ namespace dlib
         }
     }
 
-        friend void deserialize (
+    inline void deserialize (
         mlp_kernel_1& item, 
         std::istream& in
     )   
@@ -344,35 +386,7 @@ namespace dlib
         }
     }
 
-    private:
-
-        long input_nodes;
-        long first_hidden_nodes;
-        long second_hidden_nodes;
-        long output_nodes;
-        double alpha;
-        double momentum;
-
-        matrix<double> w1;
-        matrix<double> w2;
-        matrix<double> w3;
-
-        matrix<double> w1m;
-        matrix<double> w2m;
-        matrix<double> w3m;
-
-
-        rand rand_nums;
-
-        // temporary storage
-        mutable matrix<double> e1, e2, e3;
-        mutable matrix<double> z, tmp1, tmp2, o;
-    };   
-
-    inline void swap (
-        mlp_kernel_1& a, 
-        mlp_kernel_1& b 
-    ) { a.swap(b); }   
+// ----------------------------------------------------------------------------------------
 
 }