I am using Dev-C++ with boost lambda expression, and I wrote the following lines:

.................

int result,switchvalue;

...............

 (switch_statement(_1,
   case_statement<1>
   (var(result)=0),
   case_statement<2>
   (var(result)=1),
   case_statement<3>
     (var(result)=constant(value)),
   default_statement
            (var(std::cout)<<"wrong")
   ))(switchvalue);

but the complier told me that:

  instantiated from `Arg::sig<boost::tuples::tuple<A&, B&, C&, Env&, boost::tuples::null_type, boost::tuples::null_type,..........

 

  instantiated from `RET boost::lambda::lambda_functor_base<boost::lambda::switch_action<5, boost::lambda::detail::case_label<Case0>, ....................

 

  instantiated from `T::sig<boost::tuples::tuple<A&, boost::tuples::null_type, boost::tuples::null_type, .........

 

  instantiated from here

 

And I do not know where is wrong and how to correct it.

By the way, can I use make_const(switchvalue) or constant(switchvalue)

instead of switchvalue?

Can any one with kindness help me?