[Boost-users] How to use if_then in boost::bind library

From: yinglcs2_at_[hidden]
Date: 2006-02-24 01:30:32

Hi,

I have the code which copy from a STL list to another
if a condition is met:

list<A*> alist;

        for (list<A*>::iterator iter = alist.begin(); iter !=
alist.end(); ++iter) {

                  A* a = (*iter);

                  if ( a->aFunc( i, j) {
               destList.push_back(a);
                        }
                }

I try doing this, but it does not compile:

for_each(alist.begin(), alist.end(), 
        if_then(  bind(&A::aFunc, _1 , i, j ),
columnBlocks.push_back(_1)));

There are my errors:

 error: no matching function for call to
‘std::vector<A*, std::allocator<A*>
>::push_back(const
boost::lambda::lambda_functor<boost::lambda::placeholder<1>
>&)
error: ‘if_then’ was not declared in this scope

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