[boost] Re: [mpl] Lambda problems (was: rebind<> bad;template template go od)

From: Aleksey Gurtovoy (agurtovoy_at_[hidden])
Date: 2002-10-04 21:24:03

David B. Held wrote:
> Ok, this is really frustrating.  I'm trying trivial examples to understand
> how lambda expressions work, and I can't get it to compile on bcc or
> gcc.  Here's what I'm doing:
> 
> #include <boost/mpl/lambda.hpp>
> #include <boost/mpl/apply.hpp>
>
//--------------------------------------------------------------------------
> -
> namespace mpl = boost::mpl;
> using mpl::_;
> 
> template <typename T>
> struct ownership
> { };
> 
> int main(int argc, char* argv[])
> {
>     typedef mpl::lambda<ownership<_> >::type f_;
>     mpl::apply<f_, int>::type t;
> }
> 
> gcc reports that 'type' is not a member of apply<...>.  bcc reports:
> 
> [C++ Error] apply.hpp(55): E2404 Dependent type qualifier
> 'ownership<_>' has no member type named 'apply'
> 
> I've tried bind<> too, with no luck.  Help!

There are several issues