v0.32

[basiliscos]

• [feature] added make_routed_message() free function.
  The function is used for "synchronized" message post-processing, i.e. once a
  message has been delivered and processed by all recipients (can be zero),
  then it is routed to the specifed address to do cleanup.

Example:

1. an db-actor and opens transaction and reads data (i.e. as std::string_views, owned by db)
2. actors sends broadcast message to all interesting parties to deserialized data
3. after the step 2 is finished the db-actor closes transaction and releases acquired resources.

The make_routed_message is needed to perform recipient-agnostic 3rd step.

The alternative is to create a copy (snapshot) of data (i.e. std::string
instead of std::string_view), but that seems redundant.

• [improvement, breaking] add void* parameter to message_visitor_t

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This discussion was created from the release v0.32.