Queries whether the result of the asynchronous computation is still pending, i.e., neither `set_value` nor `set_error` has been called on the @ref pro

Appends to the buffer and calls `on_producer_wakeup` on the consumer if the buffer becomes non-empty. @returns the remaining capacity after inserting

Returns whether a message is tagged as answered by the receiving actor.

Returns a pointer to the owning @ref multiplexer instance.

Triggers the action.

@copydoc use_certificate_file

@copydoc use_private_key_file

Returns an iterator to the beginning.

Tries to connect to given node. @experimental

Satisfies the promise by sending an empty message. @note Sends no message if the request message was asynchronous, i.e., if `async() == true`. @post `

Returns `true` if this manager has a parent, `false` otherwise.

Queries whether there is at least one observer subscribed to the operator.

Throws a `requirement_failed` to indicate that requirement check failed.

Throws a `nesting_error` to indicate that `child` is not allowed in `parent`.

Utility function to remap the string view from old base to new base.