A transformer messaging block is a single-target, multi-source, ordered propagator_block which can accept messages of one type and is capable of storing an unbounded number of messages of a different type.
template< class _Input, class _Output > class transformer : public propagator_block<single_link_registry<ITarget<_Output>>, multi_link_registry<ISource<_Input>>>;
Accepts a message that was offered by this transformer messaging block, transferring ownership to the caller.
Consumes a message previously offered by the transformer and reserved by the target, transferring ownership to the caller.
A callback that notifies that a new target has been linked to this transformer messaging block.
Asynchronously passes a message from an ISource block to this transformer messaging block. It is invoked by the propagate method, when called by a source block.
Executes the transformer function on the input message and tries to offer the resulting message to all of the linked targets.
Releases a previous message reservation. (Overrides source_block::release_message.)
Reserves a message previously offered by this transformer messaging block. (Overrides source_block::reserve_message.)
Resumes propagation after a reservation has been released. (Overrides source_block::resume_propagation.)
Synchronously passes a message from an ISource block to this transformer messaging block. It is invoked by the send method, when called by a source block.