Re: [boost] Serialization Draft # 12

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-09-19 00:37:49

Robert Ramey wrote:
> Vladimir Prus wrote:
> >-            if(file_version >= unsigned int(2))
> >+            if(file_version >= static_cast<unsigned int>(2))
>
> Hmm - I just changed it to:
> 	if(file_version >= 2)
>
> It compiles with VC and gcc 3.2.  Does gcc 3.2 complain about that?

This is fine for 3.3.

> >-        ar.register_type<bus_stop_corner>();
> >-        ar.register_type<bus_stop_destination>();
> >+        ar.template register_type<bus_stop_corner>();
> >+        ar.template register_type<bus_stop_destination>();
>
> gosh - I've never seen that syntax before.  
> I don't even know what it means.  

This means: "consider register_type to be name of template"

> What was the 3.3 complaint with the original?

The complaint was: 
demo.cpp: In member function `void bus_route::serialize(Archive&, unsigned 
int)
   ':
demo.cpp:180: error: syntax error before `;' token

The minimal example is:

class C {
public:
        template<class Archive>
        void serialize(Archive& ar)
        {
             ar.register_type<int>();
        }
};

I was not able to test with online comeau, since it seems to fail on 
everything, with no error messages. Further, I have failed to find the 
relevant text in the standard. The syntax I've used is allowed by the 
grammar, but I think there is some text about it as well.

- Volodya