STL algorithm member function problem

Hi all,

I have an application that works on a series of file names stored in a
vector<string>.
I have a set of rules that I want to apply to that list to narrow the
list down. Each rule operates on a single file name, and it determine
whether the filename should remain or be removed from the list of
filenames. There are several different types of rules, each inherited
from a base class Rule, which is inherited from unary_function. The
list of rules is stored in a vector as boost shared_ptr objects of type
Rule*.

I want to iterate over all the rules in the list and apply them to the
filename list using the remove_if algorithm. But I am having trouble
with the remove_if call.

Thus the code looks something like this:

class Rule : public std::unary_function<std::string, bool> {
public:
   virtual result_type operator()(const argument_type&) const =0;
};

typedef boost::shared_ptr<Rule> RulePtr;

///////////////
// Concrete rules are inherited from the Rule class and define
// the operator()

......

    vector<string> fileList;
    // .... fill fileList with a series of file names ...

     //Now remove items from the fileList according to the rules.
     //Iterate over all the rules in the rules vector. Apply the rule
to each of
     // items in the fileList and remove it if the rule returns true.
     for(vector<RulePtr>::const_iterator ruleIter = m_rules.begin();
    ruleIter != m_rules.end(); ++ruleIter) {

           // This is the problem line...
           std::remove_if(fileList.begin(), fileList.end(), ptr_fun(
xxx );
     }

Can someone help me with the correct syntax for the remove_if function?
 I can't seem to get it right.

Thanks,
Matt.

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