Re: [Boost-users] unordered_set insert returns const_iterator ?

From: Abir Basak (abirbasak_at_[hidden])
Date: 2008-03-20 14:01:13

>
> I don't have access to that compiler. I tried running similar code in
> Visual C++ 6.5 and Visual C++ express 8, and they both worked. I can
> try adding something to the unit tests but that will take me a while
> to work through. At the end of this email is the code I tested with,
> can you try it on your compiler? If it works, I'm doing something
> different to you, do you have any idea what?
>
> thanks,
>
> Daniel
>
> #include <boost/unordered_map.hpp>
> #include <boost/tuple/tuple.hpp>
> #include <iostream>
>
> int main() {
>       typedef boost::unordered_multimap<char, int> Mymap;
>       Mymap c1;
>
>       c1.insert(Mymap::value_type('a', 1));
>       c1.insert(Mymap::value_type('a', 2));
>       c1.insert(Mymap::value_type('b', 3));
>       c1.insert(Mymap::value_type('c', 4));
>
>       Mymap::iterator it,end;
>       boost::tie(it,end) = c1.equal_range('a');
>       for( ; it!=end; ++it) {
>               std::cout<<(*it).second<<" ";
>       }
> }

Yes, MSVC 9 (i.e 2008) runs it properly, but MSVC 7.1 (2003 . NET)  fails to
compile it.
It looks like, for some reason node_ = data::next_group(node_); from
increment_group() tries to construct data, which is  a typedef to
BOOST_UNORDERED_TABLE_DATA even while using static function for that.
  just changing the statement to node_ = next_group(node_);
(hash_table_impl.hpp cvs line no 301) works. so it seems, msvc 7. either
doesn't support calling static function by class name typedef, or the data
typedef is confused with some other (like BOOST_UNORDERED_TABLE) note node_
= BOOST_UNORDERED_TABLE_DATA::next_group(node_); also works fine.

i tried to produce some simple test case for this, like
class outer{
public:
    typedef outer outer_t;
    inline static void func(){}
    class inner{
        void func1(){
            outer_t::func();// func() this works;or outer::func() works
        }
    };
};
this doesn't work in msvc 7.1 but works in 9.0 . i am not sure if it is
valid in standard though.

 The error is,
E:\lib\boost\trunk\boost\unordered\detail\hash_table_impl.hpp(301): error
C2039: 'hash_table_data_equivalent_keys<std::allocator<std::pair<char const
,int> > >' : is not a member of
'boost::unordered_detail::hash_table_data_equivalent_keys<Alloc>::iterator_base'
        with
        [

Alloc=boost::unordered_detail::hash_types_equivalent_keys<std::pair<const
char,int>,char,boost::hash<char>,std::equal_to<char>,std::allocator<std::pair<const
char,int>>>::value_allocator
        ]

thanks
(sorry for double posting ... last message subject line was wrong)
abir