Later versions of stdexec support both tag_invoke and member functions, but the standard will use member functions only. We should try to migrate to use member functions only where it makes sense with reasonable backwards compatibility to the old C++17 implementation in pika.
The following CPOs and customizations can be translated quite simply:
[ ] set_value_t (#1295)
[ ] set_error_t
[ ] set_stopped_t
[ ] start_t
[ ] connect_t
[ ] schedule_t
Sender adaptor customization we currently still do with tag_invoke, but this is not an as straightforward translation. E.g. tag_invoke(bulk_t, thread_pool_scheduler, ...) would need to be translated to transform_sender(thread_pool_scheduler_domain, bulk_sender). We don't have domains implemented for schedulers yet, so we'd need that before tackling this.
Later versions of stdexec support both
tag_invokeand member functions, but the standard will use member functions only. We should try to migrate to use member functions only where it makes sense with reasonable backwards compatibility to the old C++17 implementation in pika.The following CPOs and customizations can be translated quite simply:
set_value_t(#1295)set_error_tset_stopped_tstart_tconnect_tschedule_tSender adaptor customization we currently still do with
tag_invoke, but this is not an as straightforward translation. E.g.tag_invoke(bulk_t, thread_pool_scheduler, ...)would need to be translated totransform_sender(thread_pool_scheduler_domain, bulk_sender). We don't have domains implemented for schedulers yet, so we'd need that before tackling this.