[omniORB] about STL used in omniORB (sorry for last same subject email)

Visscher, Bruce VISSCHB@RJRT.com
Fri Aug 23 18:04:01 2002

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> This question may be not suitble here(sorry for
> that),but I am confused on the results.

Yes, it is somewhat off topic.

> I use std::map in one omniORB servlet: below is its
> definition in .h file:
> "
>   struct eqstr
>     {
>         bool operator()(const char* s1, const char*=20
> s2) const
>         {
>                 return strcmp(s1, s2) =3D=3D 0;
>         }
>     };
>     //Rule is one struct defined in IDL file
>     typedef map<const char*, Rule, eqstr > Rules_Map;
>     Rules_Map rule_map;

The third template argument of map should provide an
ordering relation. You have supplied an equivalence
relation.  This will not work.

I would recommend using std::string rather than pointer
to const char.  That way you can use the default (std::less)
for the comparitor.  You also won't have to worry about
allocation issues.  You may need to convert between
std::string and CORBA::String_var (to make it more on topic)
and/or pointer to char but I think it would be well worth it.

Technically, you could rename eqstr to ltstr and
"return strcmp(s1, s2) < 0;" but you would be left with the
allocation issues which I think could get tricky in
a multithreaded environment.



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