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Simon Peyton Jones authored
This is the result of Simon and Dimitrios doing a code walk through. There is no change in behaviour, but the structure is much better. Main changes: * Given constraints contain an EvTerm not an EvVar * Correspondingly, TcEvidence is a recursive types that uses EvTerms rather than EvVars * Rename CtFlavor to CtEvidence * Every CtEvidence has a ctev_pred field. And use record fields consistently for CtEvidence * The solved-constraint fields of InertSet (namely inert_solved and inert_solved_funeqs) contain CtEvidence, not Ct There is a long cascade of follow-on changes.
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