weird behavior returning delegate

[Chris Nicholson-Sauls]

Tom S wrote:
> Carlos Santander wrote:
> 
>> Thanks for the answers. I was hoping D could be added to 
>> http://www.paulgraham.com/accgen.html only with three lines instead of 
>> something like that horrible C++ code.
> 
> 
> It's not very bad in D:
> 
> 
> T delegate(T) acc(T)(T i) {
>     class Foo {
>         T x;
>         this() { x = i; }
>         T func(T a) { return x += a; }
>     }
>     return &(new Foo).func;
> }
> 
> or
> 
> T delegate(T) acc(T)(T i) {
>     auto res = new class Object {
>         T x;
>         T func(T a) { return x += a; }
>     };
>     res.x = i;
>     return &res.func;
> }
> 

Or even this:

# T delegate (T) foo (T) (T n) {
#   with ( new class Object { private T x; public T acc (T i) { return x += i; } } ) {
#     x = n;
#     return &acc;
#   }
# }

If in delegate literals we could declare static variables initialized from the local 
frame, then it could even have simply been this:

# T delegate (T) foo (T) (T n) {
#   return (T i) {
#     static T x  = n ;
#     return   x += i ;
#   };
# }

Alas.

-- Chris Nicholson-Sauls