# HG changeset patch
# User Adam Chlipala <adam@chlipala.net>
# Date 1297201961 18000
# Node ID a6730c3cfea7f66ea870f58f8bc3fda4ca056041
# Parent  67b33be5d56afa424d1c467b32e84dc8cc4dcff5
Record.equal

diff -r 67b33be5d56a -r a6730c3cfea7 record.ur
--- a/record.ur	Thu Feb 03 14:22:02 2011 -0500
+++ b/record.ur	Tue Feb 08 16:52:41 2011 -0500
@@ -6,3 +6,9 @@
      (fn [nm ::_] [r ::_] [[nm] ~ r] y acc =>
          acc || x = y)
      False fl r
+
+fun equal [ts ::: {Type}] (eqs : $(map eq ts)) (fl : folder ts) (r1 : $ts) (r2 : $ts) : bool =
+    @foldR3 [eq] [id] [id] [fn _ => bool]
+     (fn [nm ::_] [t ::_] [r ::_] [[nm] ~ r] isEq x y acc =>
+         acc && @eq isEq x y)
+     True fl eqs r1 r2
diff -r 67b33be5d56a -r a6730c3cfea7 record.urs
--- a/record.urs	Thu Feb 03 14:22:02 2011 -0500
+++ b/record.urs	Tue Feb 08 16:52:41 2011 -0500
@@ -2,3 +2,6 @@
 
 val mem : a ::: Type -> ns ::: {Unit} -> eq a -> folder ns -> a -> $(mapU a ns) -> bool
 (* Is a value found in a record? *)
+
+val equal : ts ::: {Type} -> $(map eq ts) -> folder ts -> $ts -> $ts -> bool
+(* Are two records equal? *)