Re: [boost] RC_1_30_0 compile error with SGI MIPSpro Compilers

From: Patrick Hartling (patrick_at_[hidden])
Date: 2003-03-03 14:05:50

The regression tests (version 3) are running, and it may be a while 
before they are done.  In the meantime, the results of preprocessing the 
file give more details of the error:

cc-1108 CC: ERROR File = 
/mnt/vracs001/home9/users/patrick/src/Boost/boost-1.30.0-cvs/boost/type_traits/is_base_and_derived.hpp, 
Line = 106
   The indicated expression must have pointer-to-function type.

       static const bool value = sizeof(bd_helper<B,D> ::check(Host(), 
0)) == sizeof(type_traits::yes_type);
                                        ^

The code in question comes from the following:

template <typename B, typename D>
struct bd_helper
{
     template <typename T>
     static type_traits::yes_type check(D const volatile *, T);
     static type_traits::no_type  check(B const volatile *, int);
};

template<typename B, typename D>
struct is_base_and_derived_impl2
{
     struct Host
     {
         operator B const volatile *() const;
         operator D const volatile *();
     };

     static const bool value = sizeof(bd_helper<B,D> ::check(Host(), 0)) 
== sizeof(type_traits::yes_type);

};

This looks okay to me (though I am not familiar with the Boost 
internals), but I think I have seen a similar error with this compiler. 
A cast might have been necessary to coerce the compiler into dealing with 
the code, but I'm guessing that is not appropriate in this case.

  -Patrick

David Abrahams wrote:
> Patrick Hartling <patrick_at_[hidden]> writes:
> 
> 
>>Is there a recommended procedure I can follow for tracking this down
>>and submitting a patch?  
> 
> 
> I would start by preprocessing the file to see what's going on behind
> that macro, then tweaking it until it works.
> 
> 
>>For example, I was considering running the regression tests for the
>>MIPSpro Compilers.  Would that be helpful,
> 
> 
> Very much so
> 
> 
>> or is someone on the Boost team on top of this already?
> 
> 
> Not that I know of.
> 

-- 
Patrick L. Hartling                     | Research Assistant, VRAC
patrick_at_[hidden]                | 2624 Howe Hall: 1.515.294.4916
http://www.137.org/patrick/             | http://www.vrac.iastate.edu/