[Boost-users] A question on if_then_else in lambda.Can any one with kindness help me?

Subject: [Boost-users] A question on if_then_else in lambda.Can any one with kindness help me?
From: fmingu (fmingu_at_[hidden])
Date: 2009-06-29 06:14:44

I use Dev-c++, and found a problem:
# indcude "boost/lambda/if
...............
typedef std::map<int, int> IIPrimemap;
IIPrimemap primemapvec;
.......................
int nnumber;
int switchvalue;
........................
  if_then_else(var(nnumber)==1,var(switchvalue)=1,
    if_then_else(count_if(primemapvec.begin(),primemapvec.end(),
       bind(&IIPrimemap::value_type::second,_1)>2)>0,
        var(switchvalue)=2,var(switchvalue)=3));
........................
But the complier told me that:
 
 no matching function for call to `if_then_else(bool, const 
   boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::other_action<boost::lambda::assignment_action>,
I do not know how to handle it.
Can any one with knidness help me?