Re: [Opencxx-users] inherited metaclasses conflict

[Grzegorz J. <ja...@he...>]

On Wed, 13 Aug 2003, yang qu wrote:

> Hi! I am still not sure how I could use opencxx in my work, but anyway
> I would like to listen to your advices for the template staffs. Thank
> you!

Basically the object model needs to be slightly redone --- in my opinion
class templates are not classes, as current design has it.

How much needs to be done depends on how do you need to use OpenC++. If
you use it as C++ static analyzer library, then you don't need to change
much, most likely you can just checkout the 'templates_exp' brach and the
code for handling specializations is there.

If you need to use occ as a whole, then again --- will you just be happy
with ignoring specializations or do your application needs occ to perform
translation on classes being template instances? Or what about:

    metaclass MyMetaclass A;
    class A { ... };

    template <class> class Templ;
    template <> class Templ<int> { typedef A type; }

    Templ<int>::type a;
    a.f();   // <----------- do you need MyMetaclass
             //              translation to kick in here?

BR
Grzegorz

> best regards
> --yang
>
> Grzegorz Jakacki <ja...@he...> wrote:
> On Mon, 4 Aug 2003, yang qu wrote:
>
> > Hi!
>
> > I believe the problem comes from "Template Specilization". In the code
> > that I attached, the template class Buffer has a general declaration
> > and a specialized declaration. the class "IntBuffer" has two parents
> > classes. one is the specialized "Buffer", and another is the normal
> > class "TestObject". The occ failed when it detected that the two
> > parent classes have different Metaclass names, namely "TemplateClass"
> > and "Class".
>
> Yes.
>
> > should this bug be fixed somehow?
>
> Yes, but I don't see any quick fix. If you would like to get down to this
> I can advice where to look etc.
>
> Best regards
> Grzegorz
>
> > best regards
> > --yang
> >
> > --------------------------------- a simple test code ----------------------
> >
> > class Mem{
> >
> > public:
> >
> > virtual int name() =0;
> >
> > };
> >
> > template class Buffer : virtual public Mem{
> >
> > public:
> >
> > int name(){return 0;}
> >
> > C get(int);
> >
> > void set(C, int);
> >
> > int size();
> >
> > private:
> >
> > C data[10];
> >
> > };
> >
> >
> >
> > template<> class Buffer: virtual public Mem{
> >
> > public:
> >
> > int name(){return 1;};
> >
> > int get(int);
> >
> > void set(int,int);
> >
> > int size();
> >
> > private:
> >
> > int data[10];
> >
> > };
> >
> > class BasicObject{
> >
> > };
> >
> > class TestObject : public BasicObject{
> >
> > public:
> >
> > virtual int type(){return 1;}
> >
> > };
> >
> > class IntBuffer : public Buffer, public TestObject{
> >
> > public:
> >
> > int type(){return 10;}
> >
> > };
> > ---------------------------------------------------
> >
> > Grzegorz Jakacki wrote:
> > On Fri, 1 Aug 2003, yang qu wrote:
> >
> > > Hi!
> > > when I was applying the openc++ on a set of regular
> > > C++ codes that can be successfully compiled using
> > > gcc3.2, I got the following error message: "inherited
> > > metaclasses conflict: test_class". the "test_class"
> > > and all of its parents classes are regular C++
> > > classes. No meta-level classes are defined in the
> > > codes. Could someone tells me what might cause the
> > > problem?
> >
> > Could you post the offending code (preferably stripped from irrelevant
> > details)?
> >
> > BR
> > Grzegorz
> >
> > > thank you in advance!
> > > best regards
> > > --yang
> > >
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> >
> > ##################################################################
> > # Grzegorz Jakacki Huada Electronic Design #
> > # Senior Engineer, CAD Dept. 1 Gaojiayuan, Chaoyang #
> > # tel. +86-10-64365577 x2074 Beijing 100015, China #
> > # Copyright (C) 2002 Grzegorz Jakacki, HED. All Rights Reserved. #
> > ##################################################################
> >
> >
> >
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> ##################################################################
> # Grzegorz Jakacki Huada Electronic Design #
> # Senior Engineer, CAD Dept. 1 Gaojiayuan, Chaoyang #
> # tel. +86-10-64365577 x2074 Beijing 100015, China #
> # Copyright (C) 2002 Grzegorz Jakacki, HED. All Rights Reserved. #
> ##################################################################
>
>
>
>
> ---------------------------------
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##################################################################
# Grzegorz Jakacki                       Huada Electronic Design #
# Senior Engineer, CAD Dept.              1 Gaojiayuan, Chaoyang #
# tel. +86-10-64365577 x2074               Beijing 100015, China #
# Copyright (C) 2002 Grzegorz Jakacki, HED. All Rights Reserved. #
##################################################################