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PR libstdc++/56492 * include/std/future (__future_base::_Result): Add result_type typedef. (__future_base::_S_allocate_result): Overload for std::allocator. (__future_base::_Task_setter): Use _Result::result_type instead of deducing the type from the task. (__future_base::_Task_state): Store allocator to allow shared state to be reset. Replace std::function with member of target object type accessed via ... (__future_base::_Task_state_base): New abstract base class. (__future_base::_Task_state_base::_M_run): New virtual function to invoke type-erased target object. (__future_base::_Task_state_base::_M_reset): New virtual function to create new shared_state using same target object and allocator. (__future_base::__create_task_state): Allocate a new _Task_state. (packaged_task::packaged_task): Use __create_task_state. (packaged_task::reset): Use _Task_state_base::_M_reset. * testsuite/30_threads/packaged_task/cons/56492.cc: New. From-SVN: r196695
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.