[boost] Re: iterator facade derived question

From: David Abrahams (dave_at_[hidden])
Date: 2004-12-01 16:33:41

Israel Fdez. Cabrera wrote:

> when I write the following code:
> 
> POLE::ole_directory_iterator _it(argv[1]); 
> POLE::ole_directory_iterator _endIt(); 
this declares a function-------------^^
not an iterator.  Try dropping the parens.

 > for (; _it != _endIt; ++_it) {
>  POLE::path _path = *_it; }
> 
> I get the following error with MSVC 7.1:
> 
> c:\...\pole++.cpp(20): error C2784: 
> 'detail::enable_if_interoperable<Derived1,Derived2,mpl::apply2<boost::detail::always_bool2,Derived1,Derived2>::type>::type
>  boost::operator !=(const
> boost::iterator_facade<Derived1,V1,TC1,R1,D1> &,const
> boost::iterator_facade<Derived2,V2,TC2,R2,D2> &)' : could not deduce
> template argument for 'const 
> boost::iterator_facade<Derived,Value,CategoryOrTraversal,Reference,Difference>
>  &' from 'POLE::ole_directory_iterator'
> 
> c:\Boost\include\boost-1_32\boost\iterator\iterator_facade.hpp(837) :
>  see declaration of 'boost::operator`!=''
> 
> I'm modifying some one else library, but I get the last version from
> the author and added the modifications to the new sources, this code
> works with the last library sources but not with the new one. I check
> the sources more than once and there are no differences. I'll be glad
> if some one give me a hint.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com