[Boost-users] Re: Newbie using multi_index

From: Joaquin M Lopez Munoz (joaquin_at_[hidden])
Date: 2004-12-08 17:46:42

Hammann, Jochen <Jochen.Hammann <at> realtech.com> writes:

> 
> Hello,
> 
> I'm new in using the MultiIndex container of Boost 1.32.0. To get familiar
> with this library I wrote a small example. During the compilation with
> the Microsoft Visual C++ 7.1 compiler I encounter an internal compiler error.
> 
> The error occurs, if I use the MultiIndex container with the following
> configuration:
> - Specification of tagged indices.
> - Specification of one composite_key template parameter.
> - Specification of at least three indices.
> 
> Example:
> 
> struct SFirst { };
> struct SSecond { };
> struct SBoth { };
> 
> typedef std::pair<std::wstring, std::wstring> Element_t;
> 
> typedef multi_index_container<Element_t,
>   indexed_by<ordered_non_unique<tag<SFirst>, member<Element_t, std::wstring, 
&Element_t::first> >,
>              ordered_non_unique<tag<SSecond>, member<Element_t, std::wstring, 
&Element_t::second> >,
>              ordered_unique<tag<SBoth>, composite_key<Element_t,
>                                                       member<Element_t, 
std::wstring, &Element_t::first>,
>                                                       member<Element_t, 
std::wstring, &Element_t::second> > > > > MultiIndex_t;
> 
> //...
> 
> int main(int argc, char** argv)
> {
>    MultiIndex_t  test;
> 
>    MultiIndex_t::index<SBoth>::type&  both  = test.get<SBoth>();
> 
>    return 0;
> }
> 
> If I compile this code I get the following internal compiler error:
> 
> d:\Libraries\DLLs\Boost\Boost_1_32_0\inc\boost\tuple\detail\tuple_basic.hpp
(612) : fatal
> error C1001: INTERNAL COMPILER ERROR
>         (compiler file 'msc1.cpp', line 2701) 
>          Please choose the Technical Support command on the Visual C++ 
>          Help menu, or open the Technical Support help file for more 
information
> 
> If I try to access the first (#0) and second (#1) index with their respective 
tags,
> everything works fine. Also, I'm able to access all three indices by their 
numerical
> value without an error.
> 
> Is the declaration of the MultiIndex_t typedef wrong?
> 

Hi, Jochen.

As Pavel says, it'd be great if you can post a complete
snippet showing the crash, so that we can try compiling
it in other platforms.
In the meantime, though, my hunch is that the compiler
is having a hard time with the length of the symbol names
generated by your definition (once expanded, it gets
pretty long.) This of course is not your fault. Please
try the following:

...

typedef composite_key<Element_t,...> SBothKeyExtractor_t;
typedef multi_index_container<Element_t,
  indexed_by<
    ordered_non_unique<tag<SFirst>,...>
    ordered_non_unique<tag<SSecond>,...>
    ordered_unique<tag<SBoth>, SBothKeyExtractor_t>
  >
> MultiIndex_t;

if this still doesn't work, try then

struct SBothKeyExtractor_t: public composite_key<Element_t,...>
{
};

// as before

which definitely shortens the symbol names for the types
generated by your program. Oh, and please report
your results (thank you!)

Hope this helps,

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo