Generic operator interface

[emil14]

Generic operator

Can also be called "reducer", "reductor" or "accumulator" interface

<T, Y T | SubStream<T>> (v Y...) (v T, args Y...)

Possible usage

Mul<SubStream<int>>

Or simply

Mul<int>

With such signature component (operator probably) can accept either:

• one or more message via array (variadic) port
• one or more sub-stream of messages via array port

Normal and nested streams could not be mixed. Such component produces result value via v outport and passes on its input arguments via args variadic outport. These args could be T messages or SubStream<T> correspondingly.

How such component interpret messages arrived at inports depends on specific component implementation (specification). For one component order may not matter (e.g. sum) and for other it will (e.g. mul).

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Related to #281

[emil14]

I'm not sure we need this generic interface, what problem are we trying to solve?