On May 4, 2007, at 7:51 PM, Rennie deGraaf wrote:
Could anyone please tell me why the following code fails to compile:
inline void rmfunc(std::list<boost::function<void()> >& funcs, boost::function<void()> f) { for (std::list<boost::function<void()> >::iterator i=funcs.begin(); i!=funcs.end(); ++i) { if (boost::function_equal(*i, *f)) i = funcs.erase(i); } }
while the following does compile:
template <typename T> inline void rmfunc(std::list<boost::function<void()> >& funcs, const T& f) { for (std::list<boost::function<void()> >::iterator i=funcs.begin(); i!=funcs.end(); ++i) { if (boost::function_equal(*i, f)) i = funcs.erase(i); } }
and seemingly equivalent code, placed in-line in the calling function, also compiles?
You cannot compare two boost::function objects directly, because it can't be implemented. See the first question on http://www.boost.org/ doc/html/function/faq.html - Doug