Pyd: Stackthreads and returning arrays from D

[Kirk McDonald]

Simen Haugen wrote:
> Ok, I just cannot get it to work..
> Look at this simple example:
> 
> import pyd.pyd;
> 
> 
> class Item {
> }
> 
> 
> class Container {
>     private:
>     Item[] _items;
> 
>     public:
>     Item[] items() {
>         return _items;
>     }
> 
>     void items(Item[] items) {
>         _items = items;
>     }
> }
> 
> 
> extern(C) void PydMain() {
>     module_init();
> 
>     wrap_class!(Item);
> 
>     wrap_class!(
>         Container,
>         Property!(Container.items)
>     );
> }
> 
> When trying to compile this I get an error "expected to return a value of 
> type Item[]" for the Container.items property:
> 
[snip] (Man, Pyd has verbose compilation output...)
> C:\Python24\lib\site-packages\celerid\infrastructure\pyd\make_object.d(228): 
> fun
> ction pyd.make_object.d_type!(Item[]).d_type expected to return a value of 
> type
> Item[]
> C:\Python24\lib\site-packages\celerid\infrastructure\pyd\make_object.d(289): 
> tem
> plate instance pyd.make_object.d_type!(Item[]) error instantiating
> C:\Python24\lib\site-packages\celerid\infrastructure\pyd\func_wrap.d(274): 
> templ
> ate instance pyd.func_wrap.PydWrappedFunc.fn!(Item[]) error instantiating
> C:\Python24\lib\site-packages\celerid\infrastructure\pyd\func_wrap.d(264): 
> templ
> ate instance pyd.func_wrap._pycallable_asdgT!(Item[] delegate(())) error 
> instant
> iating
> error: command 'c:\d\dmd\bin\dmd.exe' failed with exit status 1
> 

Careful reading of the type conversion docs
     http://pyd.dsource.org/conversion.html
will reveal that, while Pyd is capable of converting D arrays to Python 
lists, it is currently unable to perform the reverse operation (with the 
exception of char arrays, of course). This is obviously stupid, and 
getting Pyd's handling of arrays right has been bumped up on my priority 
list. (I'll probably set it up so that any Python iterable whose 
elements can be converted to the proper type can be converted to a D array.)

> 
> When I used stackthreads I had no problem returning array of classes.
> 
> 

Pyd can easily return an array. It is the reverse operation (wrapping 
functions with array parameters) which causes problems at the moment.

-- 
Kirk McDonald
http://kirkmcdonald.blogspot.com
Pyd: Connecting D and Python
http://pyd.dsource.org