RE: [Boost-users] tuple problems

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2004-01-16 07:30:35

programmer blabla <programmer_blabla_at_[hidden]> wrote:
> Dear Booster's

Booster's what?

> I have a problem compiling a tuple containing an enum in a
> namespace. For example:
> 
> namespace TestTuple
> {
>     enum ETestTuple
>     {
>         eTestTuple0 = 0,
>         eTestTuple1 = 1
>     };
> }
> 
> void Testtuple5()
> {
>     typedef boost::tuple<TestTuple::ETestTuple> Tuple;
>     Tuple tpl;
> }
> 
> does not compile. I am using MSVC 2003.net (7.1 version), 
> just native code. Is this a M$ problem or is tuple broken?

Looks like a compiler bug to me.

> Also I get problem with 
> the combination 
> of boost::bind and tuple, for example:
> 
> int               i;
> boost::tuple<int> data;
>     
> i = data.get<0>();                                  //ok
> i = boost::tuples::get<0>(data);                    //ok    
> i = boost::bind(&boost::tuples::get<0>, _1)(data);  //error
>     
> Has anyone a clue?

boost::tuples::get has three template parameters - index, head type
and tail type.  Usually the type arguments can be deduced, but since
you're passing the address to another template function you need to
specify all three arguments.

> Btw searching lists.boost.org is very hard, because google 
> is out of sync with the list.

Try <http://news.gmane.org/index.php?prefix=gmane.comp.lib.boost>
instead.