lpc()'s return type is decltype(to_future(func())), which is incorrect if func returns void

[Amir Kamil]

to_future() cannot be applied to void, so this won't compile. (It would also need to be a trailing return type since func is not yet in scope.) Instead, I suggest using future_invoke_result_t<Func> instead, which will produce future<> in this case.

[Amir Kamil]

Fix Issue #87: lpc()'s return type is decltype(to_future(func())), which is incorrect if func returns void. Also remove wording that implies that a copy of the associated value is done when func() returns a future. This is not the case if the associated value is stored by reference (e.g. future<dist_object<T>&>).

→ <<cset 8e409d10a39a>>