: Cannot implement with language itself. Need compiler support. Used C++ N STL
: Partially implemented with C++ N
: Fully implemented with C++ N
: Not yet implemented
| Features | Standard | Implemented in |
|---|---|---|
| Classes | ||
| promise |  |
 |
| packaged_task | |
|
| future | |
|
| shared_future | |
|
| launch | |
|
| future_status | |
|
| future_error | |
|
| future_errc | |
|
| ss::uses_allocator<ss::promise> | |
|
~~ (until C++17)~~ |
 |
Removed in C++17 |
| Functions | ||
| async | |
|
| future_category | |
|
| ss::swap(ss::promise) | |
|
| ss::swap(ss::packaged_task) | |
|