[Boost-bugs] [Boost C++ Libraries] #11305: bind added overload generate ambiguity

Subject: [Boost-bugs] [Boost C++ Libraries] #11305: bind added overload generate ambiguity
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-05-14 17:03:35

#11305: bind added overload generate ambiguity
-------------------------------+---------------------
 Reporter:  gerald.langlois@…  |      Owner:  pdimov
     Type:  Bugs               |     Status:  new
Milestone:  To Be Determined   |  Component:  bind
  Version:  Boost 1.58.0       |   Severity:  Problem
 Keywords:                     |
-------------------------------+---------------------
 When providing an explicit return type when the function result_type may
 or may not be deduced. If the result type is the same than the one
 requested by the generated function, the two template specialization
 become valid and then create ambiguity.

 ----

 template<class Rt2, class R, class T,
     class B1,
     class A1, class A2>
     _bi::bind_t<Rt2, _mfi::BOOST_BIND_MF_NAME(mf1)<R, T, B1>, typename
 _bi::list_av_2<A1, A2>::type>
     BOOST_BIND(R (BOOST_BIND_MF_CC T::*f) (B1), A1 a1, A2 a2)

 template<class R, class T,
     class B1,
     class A1, class A2>
     _bi::bind_t<R, _mfi::BOOST_BIND_MF_NAME(mf1)<R, T, B1>, typename
 _bi::list_av_2<A1, A2>::type>
     BOOST_BIND(R (BOOST_BIND_MF_CC T::*f) (B1), A1 a1, A2 a2)


 ----

 // Here is my use case that fail on my end

 class any_function
 {
 public:

 template <typename T0, typename T1, int i>
 typename boost::enable_if<
         boost::is_member_function_pointer<T0>,
         CAnyFunction&>::type
 set(T0 t0, T1 t1, boost::arg<i> i1)
 {
         typedef function_traits<T0> traits;
         typedef typename traits::result_type result_type;
         Functor =
                 boost::function<result_type (traits::arg1_type)>
 (boost::bind<result_type>(t0, t1, i1));
         return *this;
 };

 private:
         boost::any Functor;
 }


 ----

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11305>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.