Mercurial > urweb
diff src/core_env.sml @ 315:e21d0dddda09
Unpoly non-recursive function
author | Adam Chlipala <adamc@hcoop.net> |
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date | Thu, 11 Sep 2008 09:36:47 -0400 |
parents | 42dfb0d61cf0 |
children | e976b187d73a |
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--- a/src/core_env.sml Tue Sep 09 12:36:13 2008 -0400 +++ b/src/core_env.sml Thu Sep 11 09:36:47 2008 -0400 @@ -65,6 +65,34 @@ | (ctx, _) => ctx} +val liftConInExp = + U.Exp.mapB {kind = fn k => k, + con = fn bound => fn c => + case c of + CRel xn => + if xn < bound then + c + else + CRel (xn + 1) + | _ => c, + exp = fn _ => fn e => e, + bind = fn (bound, U.Exp.RelC _) => bound + 1 + | (bound, _) => bound} + +val subConInExp = + U.Exp.mapB {kind = fn k => k, + con = fn (xn, rep) => fn c => + case c of + CRel xn' => + (case Int.compare (xn', xn) of + EQUAL => #1 rep + | GREATER => CRel (xn' - 1) + | LESS => c) + | _ => c, + exp = fn _ => fn e => e, + bind = fn ((xn, rep), U.Exp.RelC _) => (xn+1, liftConInCon 0 rep) + | (ctx, _) => ctx} + (* Back to environments *) exception UnboundRel of int