Heapster substitution improvements #1437
Merged
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This PR changes a few key details of how substitution into name-bindings is implemented, to ensure that substitution always keeps its output name-bindings in fresh pair form, thereby reducing the conversions between pair and function form.
This PR also introduces
mbSimplImplOut
, which computes the output permissions of aSimplImpl
in a name-binding in a way that, like the change to substitution, ensures that the output name-binding is still in pair form.