* The definition CONTINUABLE_HAS_COROUTINE now indicates support for coroutines,
while CONTINUABLE_HAS_EXPERIMENTAL_COROUTINE is added if the experimental version is used.
* Throws a await_canceled_exception now which automatically gets
converted to a default exception type again if it becomes unhandled in the handler.
* Ref #32
* Introduce cancellation_result to represent a cancelled async task
* Add cancellation unit tests
* This doesn't allow cancellation of continuables, it is meant
for treating the special state action canceled on the receiver side.
Cancellation of a chain is still up to the user.
* Can be used to specialize the asynchronous control flow
on immediate available asynchronous results mostly returned by:
- make_ready_continuable
- make_exceptional_continuable
* Usable to avoid longer unnecessary synchronous callback nestings.
* cti::query_arg_t was renamed into cti::unpack_arg_t.
* The continuation overload nowreturns result<Args...> rather
than std::tuple<Args...>.
* Add is_ready optimizations to make_exceptional_continuable.
* This makes it possible to use promise_base for optional
promises directly rather than wrapping it as optional<promise_base<...>>.
* Invalidate the promise_base after its first usage.
* Expose an `operator bool()` to make the validility accessible.
* Remove the no longer needed private promise_no_init_arg_t tag.
* Makes compiler output much more readable
This is configurateable through CONTINUABLE_WITH_IMMEDIATE_TYPES,
and automatically enabled for debug builds but disabled
for release builds.
* Remove the old continuable-trait.hpp header
* Make the signature of continuable not dependent anymore
on any size of the arguments which fixes the compilation
with forward declared types.
Thanks Rogiel for the correspoding bug report.
Closes#11
