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To avoid issues with accidentally mapping to none, prevent .map from being called with void functions. BREAKING CHANGE: .map no longer accepts void functions (or ones that return unknown), use tap instead.
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@@ Coverage Diff @@
## tap #78 +/- ##
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Coverage 100% 100%
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Files 6 6
Lines 117 117
Branches 11 11
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Hits 117 117
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This is a potential implementation of the changes described in #76. Disallowing
voidfunctions from being passed to.mapturned out to be more tricky than I initially thought.This works, but with a major caveat: it also blocks functions that return
undefined. I couldn't find a way to permitunknownwithout permittingvoid, (asvoidis assignable tounknown). They'd have to cast theirunknowns asNotVoid.So I'm not completely happy with this change; I'm putting it up as something between a WiP and a PoC.