Conference turris::decladebug

917.0. "Problems debugging templates" by CXXC::MJHANS (Matthew Hanselman, DEC C/C++) Tue Apr 08 1997 14:56

    I know there are known problems here, so you may know if this already
    -- or maybe it's a GEM bug?
    
    The new template debugging support doesn't work 100%, even when the
    template definitions are in a header file.  I was adding this test to
    our test system when I noticed that the breakpoint buttons show up
    for only some member functions.
    
    If you start use dxladebug 4.0-35 and DEC C++ T5.6-001, step in
    t_s's constructor, you'll see breakpoint buttons for T::T() and
    T::output(), but no breakpoint buttons for T::~T() and T::setdata()
    
    // x_template5.cxx
    #include <iostream.h>
    #include "x_template5.hxx"
    
    main()
    {
        T<short int> t_s;
        T<long int> t_l;
    
        t_s.setdata(5);
        t_l.setdata(10);
    
        t_s.output();
        t_l.output();
    }
    ------------------------------------------------------------
    // x_template5.hxx
    template <class t> class T {
        t data;
    public:
        void output();
        void setdata(t toset);
        T();
        ~T();
    };
    
    template <class t> void T<t>::setdata(t toset)
    {
        cout << "Setting data" << endl;
        data = toset;
        cout << "Set data to " << data << endl;
    }
    
    template <class t> T<t>::T()
    {
        cout << "In ctor" << endl;
        cout << "sizeof(t) == " << sizeof (t) << endl;
        setdata(0);
    }
    
    template <class t> T<t>::~T()
    {
        cout << "In dtor" << endl;
    }
    
    template <class t> void T<t>::output()
    {
        cout << "Starting to output data" << endl;
        cout << "Data is " << data << endl;
        cout << "Finished outputting data" << endl;
    }
    
    							- Matt

I'm not sure whats happening on the template side of this, but I
do know that Ladebug supporting v5.6 C++ still has some lingering
problems accessing members from inside classes.

I have a fix for that problem, so I'll try it out and see if it
fixes your problem as well.

- Steve

Well, this problem does not appear to be related to .2


- Steve