If valid () is false before the call to this function, the behavior is undefined. In general, it probably doesnt. · one plausible scenario is existence of another future grants that are assigned on schema level to different role. That would mean that each project in the future should specify the cmake version on which it should be built. Perhaps installing a previous version of cmake is the only way that always works? · the get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). In such situation future grants assigned on the database level are ignored. · an asynchronous operation (created via std::async, std::packaged_task, or std::promise) can provide a std::future object to the creator of that asynchronous operation. The creator of the asynchronous operation can then use a variety of methods to query, wait for, or extract a value from the std::future. Right after calling this function, valid () is false. Considerations when future grants are defined on the same object type for a database and a schema in the same database, the schema-level grants take precedence over the database level grants, and the. Im wondering how this break in backwards compatibility should in general be navigated. · in this case it does work. Std::future is an object used in multithreaded programming to receive data or an exception from a different thread; It is one end of a single-use, one-way communication channel between two threads, std::promise object being the other end.

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