I want to know what is most interesting for me: delegates or functions.
I consulted sources but none say the practical consequences of such
election.
in addition to what john said: regarding _function literals_ the
difference is by using a delegate instead of a function you have access
to the enclosing frame, e.g. variables in the same scope.
the following code doesn't compile with the error "[...] cannot access
frame of [...]":
int y;
auto fn= function(int x) {return x+y;};
if you change this to:
int y;
auto fn= delegate(int x) {return x+y;};
it compiles without error.
