[boost] Re: [FOREACH] new version available, testers needed

From: Russell Hind (rh_gmane_at_[hidden])
Date: 2005-03-10 12:03:28

Eric Niebler wrote:
> 
> I'm afraid you're out of luck, for now. Without access to this compiler, 
> or knowledge of it's quirks, there's nothing I can do. I'll gladly 
> accept a patch if you can make it work. The first thing I would try if I 
> were you would be to change the line:
> 
>      typedef mpl::bool_<value> type;
> 
> to
> 
>      typedef mpl::bool_<is_range_base<T>::value> type;
> 
> That's all I can think of right now.
> 

Well we're getting somewhere.  That has made foreach.hpp compile.  I 
have to #define BOOST_FOREACH_NO_CONST_RVALUE_DETECTION and a couple of 
examples I've tried now work.

I haven't tried the tests (not sure how to run them easily) but this 
simple example compiles and runs (albeit with a load of compiler 
warnings about passing temporaries in to functions)

     BOOST_FOREACH( char ch, "Hello!" )
     {
         std::cout << ch;
     }
     std::cout << std::endl;

std::vector<int> v;
     BOOST_FOREACH(int& i, v)
     {
         i *= 2;
         std::cout << i << std::endl;
     }

The compiler warnings are listed below.  You can disable warnings 
temporarily on borland by

#ifdef __BORLANDC__
#  pragma option push -w-8032
#endif

before the call and

#ifdef __BORLANDC__
#  pragma option pop
#endif

After the call.  Don't know if you want to mess around with you code to 
do this or not.

If i get the tests running, I'll report back with the details.

Cheers

Russell

[C++] main.cpp(1):
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::mpl::false_ is_rvalue<char *>(char * 
&,int)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::mpl::false_ is_rvalue<char *>(char * 
&,int)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::mpl::false_ is_rvalue<char *>(char * 
&,int)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'
[C++ Warning] main.cpp(14): W8032 Temporary used for parameter 1 in call 
to 'boost::foreach_detail_::boost::foreach_detail_::type2type<char 
*,boost::mpl::false_> * encode_type<char *>(char * &)'