Fix false "discarded non-Unit value" errors on @react classes #296
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Macro-generated class body emitted calls to
bump
, which accepted=> Unit
.Since last expression of that call was
null.asInstanceOf[Snapshot]
, Scala would auto-discard that value, and emit a warning if user has -Ywarn-value-discard. That means a false positive warning for each @react class.Explicitly returning () in the block fixes that for scalac lint.