Throw an error when encountering missing values #183
Merged
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JET.jl rightly notes that this function will error if a
missing
appears inside an expression, and we try to bind it. This is certainly an edge case (and clearly no-one's hit it so far), but strictly speakingmissing
is allowed inExpr
s, and the internal error isn't ideal if someone does hit it. So I've added an explicit error. In future we could add support (probably by assumingmissing == missing
for the purposes of this check).Separately: unfortunately, JET/Julia's inference isn't smart enough to figure out that the missing-boolean error no longer applies. Is there some way to assert that
env[name]::!Missing
, ie anything other than missing? A type assert would be ok, but I'd be a bit reluctant to do anything more complex that sacrifices readability.