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### 1512. Conflict in specification: block or join?

Section: 33.10.9 [futures.async] Status: NAD Editorial Submitter: INCITS Opened: 2010-08-25 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

Addresses US-205

33.10.9 [futures.async] p. 3: The third sentence says "If the invocation is not deferred, a call to a waiting function on an asynchronous return object that shares the associated asynchronous state created by this `async` call shall block until the associated thread has completed." The next sentence says "If the invocation is not deferred, the `join()` on the created thread..." Blocking until a thread completes is not necessarily a join.

[ Resolution proposed by ballot comment: ]

Decide whether the requirement is to block until finished or to call join, and rewrite to match.

Proposed resolution: