Made fc<> always use a bias and added an fc_no_bias<> for the other case.

dlib/dnn/layers.h

@@ -705,10 +705,15 @@ namespace dlib
 
     template <
         unsigned long num_outputs,
-        fc_bias_mode bias_mode,
         typename SUBNET
         >
-    using fc = add_layer<fc_<num_outputs,bias_mode>, SUBNET>;
+    using fc = add_layer<fc_<num_outputs,FC_HAS_BIAS>, SUBNET>;
+
+    template <
+        unsigned long num_outputs,
+        typename SUBNET
+        >
+    using fc_no_bias = add_layer<fc_<num_outputs,FC_NO_BIAS>, SUBNET>;
 
 // ----------------------------------------------------------------------------------------
 

dlib/dnn/layers_abstract.h

@@ -396,13 +396,17 @@ namespace dlib
         !*/
     };
 
+    template <
+        unsigned long num_outputs,
+        typename SUBNET
+        >
+    using fc = add_layer<fc_<num_outputs,FC_HAS_BIAS>, SUBNET>;
 
     template <
         unsigned long num_outputs,
-        fc_bias_mode bias_mode,
         typename SUBNET
         >
-    using fc = add_layer<fc_<num_outputs,bias_mode>, SUBNET>;
+    using fc_no_bias = add_layer<fc_<num_outputs,FC_NO_BIAS>, SUBNET>;
 
 // ----------------------------------------------------------------------------------------
 

dlib/test/dnn.cpp

@@ -1176,7 +1176,7 @@ namespace
 // ----------------------------------------------------------------------------------------
 
     template <unsigned long n, typename SUBNET> using rcon = max_pool<2,2,2,2,relu<bn_con<con<n,5,5,1,1,SUBNET>>>>;
-    template <unsigned long n, typename SUBNET> using rfc = relu<bn_fc<fc<n,FC_HAS_BIAS,SUBNET>>>;
+    template <unsigned long n, typename SUBNET> using rfc = relu<bn_fc<fc<n,SUBNET>>>;
 
     void test_tagging(
     )
@@ -1190,6 +1190,8 @@ namespace
         DLIB_TEST(layer<skip1>(net).num_layers == 8+3+3);
         DLIB_TEST(&layer<skip1>(net).get_output() == &layer<tag1>(net).get_output());
         DLIB_TEST(&layer<skip1>(net).get_output() != &layer<tag1>(net).subnet().subnet().get_output());
+        DLIB_TEST(net.subnet().subnet().subnet().layer_details().get_num_outputs() == 10);
+        DLIB_TEST(net2.subnet().subnet().subnet().layer_details().get_num_outputs() == 4);
     }
 
 // ----------------------------------------------------------------------------------------