RE: [boost] Problem with tuple get

From: Gary Powell (Gary.Powell_at_[hidden])
Date: 2001-04-11 15:31:43

Dave I think he meant Service Pack 5. I just don't have time to look into it
today.
  -gary-

gary.powell_at_[hidden]

> -----Original Message-----
> From:	David Abrahams [SMTP:abrahams_at_[hidden]]
> Sent:	Wednesday, April 11, 2001 12:26 PM
> To:	boost_at_[hidden]
> Subject:	Re: [boost] Problem with tuple get
> 
> Dale,
> 
> Pretty much nobody at boost is trying to support MSVC5.x. It has too many
> language nonconformance issues to be worth the trouble.
> 
> Regards,
> Dave
> 
> ----- Original Message -----
> From: "Dale Peakall" <dale.peakall_at_[hidden]>
> 
> > There's a problem with tuple (from the vault) on MSVC SP5.
> >
> > The following program demonstrates the problem:
> >
> > #include <iostream>
> > #include <boost/tuple.hpp>
> >
> > int main() {
> >   boost::tuple<int, int, int> t = boost::tuple<3, 9, 27>;
> >
> >   std::cout << "1: " << boost::get<1>(a) << std::endl;; // output's 27!
> >   // likewise for get<2> and get<3> all output 27
> >
> >   return 0;
> > }
> >
> > I don't see that the tuple library is at fault though.  It appears to
> > be an MSVC problem as the instantiation of:
> >
> > template<int N, typename Tuple>
> > typename tuple_element_type_ref<N, Tuple>::RET
> > get(Tuple & t) {
> >   int n = N; // added for debugging: n == 3!
> >   return tuple_element<N>::get(t);
> > }
> >
> > Is instantiated with N == 3 even though explicitly provided at call as
> 1.
> >
> > Although I was under the impression that this specific version of tuple
> > was supposed to work with VC (n.b. this instance is not tested for in
> > tuple_test.cpp).
> >
> > - Dale.
> >
> >
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