class A
{
   bool OutofRange(string& a,string& b,string c);
   void Get(vector <string>& str,string& a,string& b);
}

void A::Get(vector <string>& str,string& b)
{
   str.erase(
            std::remove_if (str.begin(),str.end(),BOOST_BIND(&A::OutOfRange,a,b,_1)),str.end()
            );
}

我收到的错误如下：

Error 7 error C2825: 'F': must be a class or namespace when followed by '::' File:bind.hpp
 Error 8 error C2039: 'result_type' : is not a member of '`global namespace'' t:\3rdparty\cpp\boost\boost-1.38.0\include\boost\bind.hpp 67

有人能告诉我我做错了什么吗？