# `EventBroker.DefFilter`

I contain the deffilter macro. Require or use me to use deffilter.

# `deffilter`
*macro* 

I am the deffilter macro, permitting inline succinct filter
definitions.  I take a module name (which becomes a child of the
current module, e.g.  deffilter Trivial inside EventBroker.Filters
defines EventBroker.Filters.Trivial), and a do-block containing case
patterns against which the event is matched and case bodies
evaluating to true or false.

My optional parameters are parameter fields for the filter, annotated
with their expected types.

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*Consult [api-reference.md](api-reference.md) for complete listing*