std::list & sorting

[vertigo]

Hello
I have:
std::list<ObjPtr *> mylist;
i wanted to sort that pointers using my own sorting function:
mylist.sort(MySortingFunction);

I can't create that function, i receive many errors could anybody
show how sould it look like ?

Thanx
Michal

 

[Ivan Vecerina]

I have:
std::list<ObjPtr *> mylist;
i wanted to sort that pointers using my own sorting function:
mylist.sort(MySortingFunction);

I can't create that function, i receive many errors could anybody show
how sould it look like ?

As a function:
bool MySortingFunction(ObjPtr* a, ObjPtr* b)
{ return a->field < b->filed; }

-> mylist.sort( & MySortingFunction );


Note that using a function object might generate faster code
(on typical platforms) because it enables inlining of the
predicate.
You could start from something like:
struct MySorter {
bool operator()(ObjPtr* a, ObjPtr* b) const
{ return a->field < b->filed; }
};

-> mylist.sort( MySorter() );


I hope this helps,
Ivan