[Boost-users] boost lambda with proxy reference object

From: Nathan Thomas (nthomas_at_[hidden])
Date: 2006-07-26 18:11:16

Hi all,

I'm trying to use boost lambda to aggregate several functor calls 
together in one pass over my data with a std::for_each(..) (using bind 
and the lambda comma operator).

I'm running into problems because I use an iterator (over type T) where 
the dereference operator doesn't return a T& but instead an object of 
type proxy<T>.  This proxy class handles marshaling the object from 
another address space & setting up a temporary copy on its construction 
and subsequently writes back on destruction.

Lambda expects (as it should) a T& from the deference attempt to invoke 
functors which are set to expect the proxy type.  Is there a template I 
can specialize for this case or some type I could but am not reflecting 
out of my iterator class to make this work.  Or is there better way to 
write this iterator that would allow me to properly pass a T& while 
still allowing some pre & post processing on the dereference?

Thanks for you time / help,

--Nathan Thomas
Texas A&M University