TxOp.h compile warning TxOpConstVisitor
---------------------------------------

                 Key: QPID-1435
                 URL: https://issues.apache.org/jira/browse/QPID-1435
             Project: Qpid
          Issue Type: Bug
          Components: C++ Broker
    Affects Versions: M4
         Environment: Windows
            Reporter: Steve Huston
            Assignee: Steve Huston


Recent change to TxOp.h and new TxOpVisitor.h cause the following compile 
warning on Visual Studio:
c:\ace\exported\qpid\trunk\qpid\cpp\src\qpid\broker\TxOp.h(31) : warning C4099: 
'qpid::broker::TxOpConstVisitor' : type name first seen using 'struct' now seen 
using 'class'
       c:\ace\exported\qpid\trunk\qpid\cpp\src\qpid\broker\TxOpVisitor.h(39) : 
see declaration of 'qpid::broker::TxOpConstVisitor'

Since TxOp.h already includes TxOpVisitor.h, there's no need to re-declare 
TxOpConstVisitor further down. Removing that fixes this. In the event it 
sometime becomes better to declare it rather than including TxOpVisitor.h, it 
should be declare using "struct" since that what it's defined as in 
TxOpVisitor.h

Index: TxOp.h
===================================================================
--- TxOp.h      (revision 711592)
+++ TxOp.h      (working copy)
@@ -28,8 +28,6 @@
 namespace qpid {
     namespace broker {

-class TxOpConstVisitor;
-
         class TxOp{
         public:
             typedef boost::shared_ptr<TxOp> shared_ptr;


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