Mercurial > urweb
diff src/elab_env.sml @ 2087:834b438d57f3
Move code from last changeset, to improve performance
author | Adam Chlipala <adam@chlipala.net> |
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date | Fri, 05 Dec 2014 19:41:27 -0500 |
parents | 3d22f761a4b7 |
children | 22117edf8fd3 |
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--- a/src/elab_env.sml Thu Dec 04 20:22:39 2014 -0500 +++ b/src/elab_env.sml Fri Dec 05 19:41:27 2014 -0500 @@ -1114,24 +1114,7 @@ case sgn of SgnError => all | SgnVar n => hnormSgn env (#2 (lookupSgnNamed env n)) - | SgnConst sgis => - let - (* This reshuffling was added to avoid some unfortunate unification behavior. - * In particular, in sub-signature checking, constraints might be unified, - * even when we don't expect them to be unifiable, deciding on bad values - * for unification variables and dooming later unification. - * By putting all the constraints _last_, we allow all the other unifications - * to happen first, hoping that no unification variables survive to confuse - * constraint unification. *) - - val (constraint, others) = List.partition - (fn (SgiConstraint _, _) => true - | _ => false) sgis - in - case constraint of - [] => all - | _ => (SgnConst (others @ constraint), loc) - end + | SgnConst _ => all | SgnFun _ => all | SgnProj (m, ms, x) => let