add debug info

include/armadillo_bits/Cube_meat.hpp

@@ -784,6 +784,10 @@ Cube<eT>::operator=(const Cube<eT>& x)
     
     arrayops::copy( memptr(), x.mem, n_elem );
     }
+  else
+    {
+    arma_debug_print("Cube::operator=(): copy omitted");
+    }
   
   return *this;
   }

include/armadillo_bits/MapMat_meat.hpp

@@ -106,7 +106,12 @@ MapMat<eT>::operator=(const MapMat<eT>& x)
   {
   arma_debug_sigprint();
   
-  if(this == &x)  { return; }
+  if(this == &x)
+    {
+    arma_debug_print("MapMat::operator=(): copy omitted");
+    
+    return;
+    }
   
   access::rw(n_rows) = x.n_rows;
   access::rw(n_cols) = x.n_cols;

include/armadillo_bits/Mat_meat.hpp

@@ -915,6 +915,10 @@ Mat<eT>::operator=(const Mat<eT>& in_mat)
     
     arrayops::copy( memptr(), in_mat.mem, in_mat.n_elem );
     }
+  else
+    {
+    arma_debug_print("Mat::operator=(): copy omitted");
+    }
   
   return *this;
   }

include/armadillo_bits/SpMat_meat.hpp

@@ -5124,7 +5124,12 @@ SpMat<eT>::init(const SpMat<eT>& x)
   {
   arma_debug_sigprint();
   
-  if(this == &x)  { return; }
+  if(this == &x)
+    {
+    arma_debug_print("SpMat::init(): copy omitted");
+    
+    return;
+    }
   
   bool init_done = false;
   

include/armadillo_bits/field_meat.hpp

@@ -2120,7 +2120,12 @@ field<oT>::init(const field<oT>& x)
   {
   arma_debug_sigprint();
   
-  if(this == &x)  { return; }
+  if(this == &x)
+    {
+    arma_debug_print("field::init(): copy omitted");
+    
+    return;
+    }
   
   field& t = (*this);