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Type-class constraints on RETURNT #4

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lammich opened this issue May 17, 2020 · 0 comments

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lammich commented May 17, 2020

RETURNT comes with no type-class constraint for the costs. However, the monad laws only hold for
::{complete_lattice,zero,monoid_add}

Does it make sense to constrain RETURNT such that at least the monad laws would hold?

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