Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Fri, 09 Nov 2012 15:17:45 +0100

On 09.11.2012 11:26, "Ing.- Büro Austel" wrote:

using the free downloadable bcc55 compiler I get the error

../../../src/libCom/cxxTemplates/epicsOnce.cpp:
Error E2316 ../../../src/libCom/cxxTemplates/epicsSingleton.h 112:
'epicsSingleton<TYPE>::reference::operator =(const
epicsSingleton<TYPE>::reference &) is not a
member of 'epicsSingleton<TYPE>::reference'
***1 error in Compile ***

any idea ?
thanks in advance,
Jens

There are more C++ implementations in heaven and earth than are dreamt

of in your philosophy.

The same file epicsSingleton.h defines starting from line 46:

template < class TYPE >
class epicsSingleton {
public:
    class reference {
    public:
/*...*/
	// this somewhat convoluted reference of the return
	// type ref through the epicsSingleton template is
	// required for the archaic Tornado gnu compiler
        typename epicsSingleton < TYPE > :: reference &
	    operator = ( const reference & );
/*...*/
}

It seems the "archaic Tornado gnu compiler" and bcc55 don't quite agree

on what valid C++ template syntax looks like.

The syntax looks strange to me, too. I simplified it to:

        reference & operator = ( const reference & );

And it compiles fine with several gcc versions for Linux and as well

with the gcc versions of vxWorks 5.5, 6.3 and 6.7. Maybe bcc is happy

with this change, too?

Can someone check with other compilers (e.g. clang, M$ cl)?

Dirk

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System