Re: [boost] howto find arg<i> in vector of arg<j>'s?

22 Jun 2006


      On 06/21/2006 09:36 AM, Larry Evans wrote:
...
How can the attached code be modified to
find expected_t0 in expected_args?
[snip]
   typedef mpl::arg<1> expected_t0;
   typedef mpl::arg<2> expected_t1;
   typedef mpl::vector<expected_t0,expected_t1> expected_args;
   typedef mpl::find<expected_args,expected_t0>::type find_t0;
Use find_if with predicate arg:
   same_arg_as<1>
where:

template<int I>
struct same_arg_as
{
     template< typename T2 > struct apply
     {
         typedef typename is_same<mpl::arg<I>,T2>::type type;
     };
};