annotate record.ur @ 12:a6730c3cfea7

Record.equal
author Adam Chlipala <adam@chlipala.net>
date Tue, 08 Feb 2011 16:52:41 -0500
parents 67b33be5d56a
children 6cd839818393
rev   line source
adam@11 1 fun numFields [r ::: {Type}] (fl : folder r) (r : $r) : int =
adam@11 2 @fold [fn _ => int] (fn [nm ::_] [u ::_] [r ::_] [[nm] ~ r] acc => acc+1) 0 fl
adam@11 3
adam@10 4 fun mem [a ::: Type] [ns ::: {Unit}] (_ : eq a) (fl : folder ns) (x : a) (r : $(mapU a ns)) : bool =
adam@10 5 @foldUR [a] [fn _ => bool]
adam@10 6 (fn [nm ::_] [r ::_] [[nm] ~ r] y acc =>
adam@10 7 acc || x = y)
adam@10 8 False fl r
adam@12 9
adam@12 10 fun equal [ts ::: {Type}] (eqs : $(map eq ts)) (fl : folder ts) (r1 : $ts) (r2 : $ts) : bool =
adam@12 11 @foldR3 [eq] [id] [id] [fn _ => bool]
adam@12 12 (fn [nm ::_] [t ::_] [r ::_] [[nm] ~ r] isEq x y acc =>
adam@12 13 acc && @eq isEq x y)
adam@12 14 True fl eqs r1 r2