refactoring catching all exceptions as const ref

modules/core/src/command_line_parser.cpp

@@ -149,7 +149,7 @@ void CommandLineParser::getByName(const String& name, bool space_delete, int typ
             }
         }
     }
-    catch (Exception& e)
+    catch (const Exception& e)
     {
         impl->error = true;
         impl->error_message = impl->error_message + "Parameter '"+ name + "': " + e.err + "\n";
@@ -182,7 +182,7 @@ void CommandLineParser::getByIndex(int index, bool space_delete, int type, void*
             }
         }
     }
-    catch(Exception& e)
+    catch (const Exception& e)
     {
         impl->error = true;
         impl->error_message = impl->error_message + format("Parameter #%d: ", index) + e.err + "\n";

modules/core/src/lut.cpp

@@ -120,11 +120,11 @@ static bool openvx_LUT(Mat src, Mat dst, Mat _lut)
         lut.copyFrom(_lut);
         ivx::IVX_CHECK_STATUS(vxuTableLookup(ctx, ia, lut, ib));
     }
-    catch (ivx::RuntimeError & e)
+    catch (const ivx::RuntimeError& e)
     {
         VX_DbgThrow(e.what());
     }
-    catch (ivx::WrapperError & e)
+    catch (const ivx::WrapperError& e)
     {
         VX_DbgThrow(e.what());
     }

modules/core/src/mean.cpp

@@ -648,11 +648,11 @@ static bool ocl_meanStdDev( InputArray _src, OutputArray _mean, OutputArray _sdv
                     pstddev[c] = 0;
             }
         }
-        catch (ivx::RuntimeError & e)
+        catch (const ivx::RuntimeError & e)
         {
             VX_DbgThrow(e.what());
         }
-        catch (ivx::WrapperError & e)
+        catch (const ivx::WrapperError & e)
         {
             VX_DbgThrow(e.what());
         }

modules/core/src/minmax.cpp

@@ -433,11 +433,11 @@ static bool openvx_minMaxIdx(Mat &src, double* minVal, double* maxVal, int* minI
             ofs2idx(src, maxidx, maxIdx);
         }
     }
-    catch (ivx::RuntimeError & e)
+    catch (const ivx::RuntimeError & e)
     {
         VX_DbgThrow(e.what());
     }
-    catch (ivx::WrapperError & e)
+    catch (const ivx::WrapperError & e)
     {
         VX_DbgThrow(e.what());
     }

modules/core/src/persistence_c.cpp

@@ -417,7 +417,7 @@ cvOpenFileStorage( const char* query, CvMemStorage* dststorage, int flags, const
 
         //mode = cvGetErrMode();
         //cvSetErrMode( CV_ErrModeSilent );
-        CV_TRY
+        try
         {
             switch (fs->fmt)
             {
@@ -427,7 +427,7 @@ cvOpenFileStorage( const char* query, CvMemStorage* dststorage, int flags, const
             default: break;
             }
         }
-        CV_CATCH_ALL
+        catch (...)
         {
             fs->is_opened = true;
             cvReleaseFileStorage( &fs );

modules/core/src/persistence_types.cpp

@@ -756,11 +756,11 @@ static void* icvReadSeq( CvFileStorage* fs, CvFileNode* node )
             flags |= CV_SEQ_FLAG_HOLE;
         if( !strstr(flags_str, "untyped") )
         {
-            CV_TRY
+            try
             {
                 flags |= icvDecodeSimpleFormat(dt);
             }
-            CV_CATCH_ALL
+            catch (...)
             {
             }
         }