Spec: Change subtype-to-constituent rule#151
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the coq formalization in #147 shows that the old rule didn’t quite work (it was confused about `5 ~> ? : opt null` I believe), but this variant does. I think all implemnetations do the right thing anways (so maybe rewriting this as a partial coercion _function_ would be helpful)
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Closing in favor of #168 |
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the coq formalization in #147 shows that the old rule didn’t quite work
(it was confused about
5 ~> ? : opt nullI believe), but this variantdoes. I think all implemnetations do the right thing anways (so maybe
rewriting this as a partial coercion function would be helpful)