Linked Lists in General ( previously Functions as Arguments)

[Lowest0ne]

Does anyone know a good source of info for passing functions as arguments? Thanks

[IWishIKnew]

that is not possible... it doesnt work that way. It's like answering a question with a question, doesnt make sense.

Why do you want to do this?

[slicedpan]

Well you can pass pointers to functions around, a quick search turned up this: http://www.newty.de/fpt/index.html

[zb0S216C]

I assume you mean a pointer/reference to a function?

typedef void (*Function)(); // Pointer to a function
typedef void (&Function)(); // Reference to a function 

Here's a good source: http://www.cprogramming.com/tutorial/function-pointers.html

_Wazzak

[Duthomhas]

There are also function objects to help you out. The old C++03 uses the ptr_fun, mem_fun, and mem_fun_ref objects to help you out (see the <functional> header).

C++11 chucks all that and gives you the std::function object to use.

What they do is wrap a function (function pointers, class member functions, lambdas, etc) and you can then treat it like any normal object.

Hope this helps.

[Lowest0ne]

Thanks, thats exactly what I mean. I'm trying to replicate the list container, so I would like to pass a function pointer to a sort method.

[IWishIKnew]

that makes no sense at all...

[Lowest0ne]

Sure it does :), but I think your name says it all.

Edit: I changed the name of this thread, but I keep answering my questions while I type :)

[Duthomhas]

That's the idea.

#include <algorithm>
#include <functional>
#include <vector> 

bool is_sort_less_than( int x );
vector <int> xs;
std::stable_sort( xs.begin(), xs.end(), std::function <bool (int)> ( &is_sort_less_than ) );