Re: [Boost-users] [type_traits] will the future has_operator_left_shift be able to test if a type is serializable to a stream ?

4 Feb 2011

      On 03/02/2011 23:03, Frédéric Bron wrote:
...
...
The #include goes fine but I still get the following error :
  error C4430: missing type specifier - int assumed. Note: C++ does not
support default-int
With the code :
  BOOST_STATIC_ASSERT(( boost::has_operator_left_shift<  int, int>::value ));
New version here:
http://www.boostpro.com/vault/index.php?action=downloadfile&filename=type_traits-dos.tar.bz2&directory=Extension&
Yes this fixes the error.

Now :

   BOOST_STATIC_ASSERT(( boost::has_operator_left_shift< std::ostream, 
int >::value ));

Yields :

boost/type_traits/detail/has_binary_operator.hpp(103) : warning C4913: 
user defined binary operator ',' exists but no overload could convert 
all operands, default built-in binary operator ',' used
         boost/type_traits/detail/has_binary_operator.hpp(139) : see 
reference to class template instantiation 
'boost::detail::has_operator_left_shift_impl::has_operator_left_shift_impl' 
being compiled
         with
         [
             LHS=std::ostream,
             RHS=int,
             RET=void
         ]
         (.....) : see reference to class template instantiation 
'boost::has_operator_left_shift' being compiled
         with
         [
             LHS=std::ostream,
             RHS=int
         ]

But no more errors, and it seems to work fine despite the warning.

Thanks !

MAT.

Re: [Boost-users] [type_traits] will the future has_operator_left_shift be able to test if a type is serializable to a stream ?

Mathieu Champlon