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Topic: Beginner's help with list_base_t (Read 2862 times) previous topic - next topic
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Beginner's help with list_base_t

Hello,

I am working on a component that interacts with the playback queue, but i am having issues retrieving the list of queued items.

I am using the provided function in playlist.h:

Code: [Select]
virtual void queue_get_contents(pfc::list_base_t<t_playback_queue_item> & p_out) = 0;


Here is the code that i have, however it gives errors:
Code: [Select]
static_api_ptr_t<playlist_manager> api;
text << "Current queue size:   " << api->queue_get_count();

pfc::list_base_t<t_playback_queue_item> queueContents;
api->queue_get_contents(queueContents);


The first two lines of the code work fine, but the third line gives me the error.

The problem is, it appears list_base_t is an abstract class so i cannot directly instantiate it.  I did find list_impl_t but that takes two template parameters, and i am not sure what to use for the second one (t_storage).

Actual error message:

Code: [Select]
error C2259: 'pfc::list_base_t<T>' : cannot instantiate abstract class


It then goes on to list every member of list_base_const_t that is virtual.

Any ideas or suggestions are appreciated.  Thanks.

Beginner's help with list_base_t

Reply #1 –
Use list_t instead of list_base_t:

Code: [Select]
pfc::list_t<t_playback_queue_item> queueContents;
 

Beginner's help with list_base_t

Reply #2 –
Ugh, such a simple fix.

Works great now, thanks