Re: [Boost-users] self-referential boost functions

28 Jun 2012

      On Thu, 28 Jun 2012, Philipp Moeller wrote:
...
Adam Crain  writes:
...
Inquiring  as to whether this is possible or if there is a better pattern
for simulating this behavior...
Is it possible for boost::function to be self referential? I.e. how do I
simulate behavior like the following:
typedef boost::function Func;
A function that does something mutable and then returns the next function
to be called or an empty function.
Boost.Function still requires static typing on the return type and that
type depends on some runtime variable, so you cannot statically type it.
What about something like:

struct t: boost::function {
   explicit t(boost::function f): boost::function(f) {}
};

t my_f() {return t(my_f);}

int main(int, char**) {
   t x(my_f);
   return 0;
}

You can also try removing the "explicit" from the constructor or add 
variadic constructor templates to make the syntax act more like 
boost::function.

-- Jeremiah Willcock