Question

I need to map a delete ptrAddr; to a boost::function0 but i have some troubles doing that for delete. free works just fine. The issue appears to be std::ptr_fun(operator delete) but i can’t figure how to make this work without writing a helper functor.

boost::function0<void> Function;
Function = boost::bind(std::ptr_fun(free), (void*)malloc_string);  //this works
Function = boost::bind(std::ptr_fun(operator delete), (void*)new_string);  //doesn't work
Function();  //call function

Answer 1

You can use delete_ptr from Boost.Lambda:

boost::bind(boost::delete_ptr(), new_string);

In C++11, you can use std::default_delete<T>:

std::bind(std::default_delete<decltype(new_string)>(), new_string);

Or just a lambda:

[new_string]() { delete new_string; }