# HG changeset patch
# User Adam Chlipala <adamc@hcoop.net>
# Date 1214488432 14400
# Node ID 8e9920db39f27db3962cd075c38e3bce3732a729
# Parent  c1e21ab42896a540781d2de02ffbd13b33cfb289
Corify cfold

diff -r c1e21ab42896 -r 8e9920db39f2 src/core.sml
--- a/src/core.sml	Thu Jun 26 09:51:28 2008 -0400
+++ b/src/core.sml	Thu Jun 26 09:53:52 2008 -0400
@@ -52,6 +52,7 @@
 
        | CRecord of kind * (con * con) list
        | CConcat of con * con
+       | CFold of kind * kind
 
 withtype con = con' located
 
diff -r c1e21ab42896 -r 8e9920db39f2 src/core_print.sml
--- a/src/core_print.sml	Thu Jun 26 09:51:28 2008 -0400
+++ b/src/core_print.sml	Thu Jun 26 09:53:52 2008 -0400
@@ -134,6 +134,7 @@
                                               string "++",
                                               space,
                                               p_con env c2])
+      | CFold _ => string "fold"
         
 and p_con env = p_con' false env
 
diff -r c1e21ab42896 -r 8e9920db39f2 src/core_util.sml
--- a/src/core_util.sml	Thu Jun 26 09:51:28 2008 -0400
+++ b/src/core_util.sml	Thu Jun 26 09:53:52 2008 -0400
@@ -143,6 +143,12 @@
                          S.map2 (mfc ctx c2,
                               fn c2' =>
                                  (CConcat (c1', c2'), loc)))
+              | CFold (k1, k2) =>
+                S.bind2 (mfk k1,
+                         fn k1' =>
+                            S.map2 (mfk k2,
+                                    fn k2' =>
+                                       (CFold (k1', k2'), loc)))
     in
         mfc
     end
diff -r c1e21ab42896 -r 8e9920db39f2 src/corify.sml
--- a/src/corify.sml	Thu Jun 26 09:51:28 2008 -0400
+++ b/src/corify.sml	Thu Jun 26 09:53:52 2008 -0400
@@ -244,7 +244,7 @@
       | L.CRecord (k, xcs) =>
         (L'.CRecord (corifyKind k, map (fn (c1, c2) => (corifyCon st c1, corifyCon st c2)) xcs), loc)
       | L.CConcat (c1, c2) => (L'.CConcat (corifyCon st c1, corifyCon st c2), loc)
-      | L.CFold _ => raise Fail "Corify CFold"
+      | L.CFold (k1, k2) => (L'.CFold (corifyKind k1, corifyKind k2), loc)
 
 fun corifyExp st (e, loc) =
     case e of
diff -r c1e21ab42896 -r 8e9920db39f2 src/monoize.sml
--- a/src/monoize.sml	Thu Jun 26 09:51:28 2008 -0400
+++ b/src/monoize.sml	Thu Jun 26 09:53:52 2008 -0400
@@ -71,6 +71,7 @@
 
           | L.CRecord _ => poly ()
           | L.CConcat _ => poly ()
+          | L.CFold _ => poly ()
     end
 
 val dummyExp = (L'.EPrim (Prim.Int 0), E.dummySpan)