type conversion errors during compilation

[Konstantin L Kouptsov]

When compiling the library and the test_signal test, I got the following
errors. Reading the report from bottom to top, I can see that bar(),
defined as int bar(float i) in test_signal.cc, instantiates
functor<float,int>, but information about the first parameter, float, or
the arg type of bar(), is not conveyed correctly to operator() in
adaptor_trait.h. I have inserted the relevant code from h files as /* */
comments below.

(I am on VS 2005)


... sending to list because I could not find where to report the bug.

--
Konstantin

================================

Compiling...
test_signal.cc
d:\vcprojects\libsigc++\sigc++\adaptors\adaptor_trait.h(82) : warning
C4244: 'argument' : conversion from 'const int' to 'const float',
possible loss of data

/*
   typename deduce_result_type<T_arg1>::type
   operator()(T_arg1 _A_arg1) const
     { return functor_(_A_arg1); }
*/


         d:\vcprojects\libsigc++\sigc++\functors\slot.h(137) : see
reference to function template instantiation 'int
sigc::adaptor_functor<T_functor>::operator ()<const int&>(T_arg1) const'
being compiled
         with
         [
             T_functor=sigc::pointer_functor1<float,int>,
             T_arg1=const int &
         ]
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(133) : while
compiling class template member function 'int
sigc::internal::slot_call1<T_functor,T_return,T_arg1>::call_it(sigc::internal::slot_rep
*,const int &)'
         with
         [
             T_functor=sigc::pointer_functor1<float,int>,
             T_return=int,
             T_arg1=int
         ]
               
/*
                  static T_return call_it(slot_rep* rep, typename
type_trait<T_arg1>::take a_1)
     {
       typedef typed_slot_rep<T_functor> typed_slot;
       typed_slot *typed_rep = static_cast<typed_slot*>(rep);
       return
(typed_rep->functor_).SIGC_WORKAROUND_OPERATOR_PARENTHESES<typename
type_trait<T_arg1>::take>
                (a_1);
     }

               
*/
               
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(529) : see
reference to class template instantiation
'sigc::internal::slot_call1<T_functor,T_return,T_arg1>' being compiled
         with
         [
             T_functor=sigc::pointer_functor1<float,int>,
             T_return=int,
             T_arg1=int
         ]
               
/*
                  template <class T_functor>
                slot1(const T_functor& _A_func) : slot_base(new
internal::typed_slot_rep<T_functor>(_A_func))
     {
       //The slot_base:: is necessary to stop the HP-UX aCC compiler
from being confused. murrayc.
       slot_base::rep_->call_ = internal::slot_call1<T_functor,
T_return, T_arg1>::address();
     }

*/
               
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(1156) : see
reference to function template instantiation
'sigc::slot1<T_return,T_arg1>::slot1<T_functor>(const T_functor &)'
being compiled
         with
         [
             T_return=int,
             T_arg1=int,
             T_functor=sigc::pointer_functor1<float,int>
         ]
               
/*
                  template <class T_functor> slot(const T_functor& _A_func) :
parent_type(_A_func) {}
*/
               
               
         d:\vcprojects\libsigc++\tests\test_signal.cc(39) : see
reference to function template instantiation
'sigc::slot<T_return,T_arg1>::slot<sigc::pointer_functor1<float,T_return>>(const
T_functor &)' being compiled
         with
         [
             T_return=int,
             T_arg1=int,
             T_functor=sigc::pointer_functor1<float,int>
         ]

/*
                    sig.connect(sigc::ptr_fun1(&bar));
*/

=====================================


Similat errors when compiling test_compatiblity:

=====================================

Compiling...
test_compatibility.cc
d:\vcprojects\libsigc++\sigc++\functors\slot.h(103) : warning C4244:
'return' : conversion from 'double' to 'float', possible loss of data
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(100) : while
compiling class template member function 'float
sigc::internal::slot_call0<T_functor,T_return>::call_it(sigc::internal::slot_rep
*)'
         with
         [
             T_functor=sigc::bind_return_functor<double,SigC::Slot0<void>>,
             T_return=float
         ]
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(454) : see
reference to class template instantiation
'sigc::internal::slot_call0<T_functor,T_return>' being compiled
         with
         [
             T_functor=sigc::bind_return_functor<double,SigC::Slot0<void>>,
             T_return=float
         ]
         d:\vcprojects\libsigc++\sigc++\functors\slot.h(1129) : see
reference to function template instantiation
'sigc::slot0<T_return>::slot0<T_functor>(const T_functor &)' being compiled
         with
         [
             T_return=float,
             T_functor=sigc::bind_return_functor<double,SigC::Slot0<void>>
         ]
         d:\vcprojects\libsigc++\tests\test_compatibility.cc(94) : see
reference to function template instantiation
'sigc::slot<T_return>::slot<sigc::bind_return_functor<double,T_functor>>(const
sigc::bind_return_functor<double,T_functor> &)' being compiled
         with
         [
             T_return=float,
             T_functor=SigC::Slot0<void>
         ]

=================================

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