Mercurial > urweb

diff src/mono_reduce.sml @ 2082:1b76ae703cbb

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Some more optimization of string expressions showing up in JSON generation (Meta library)
author Adam Chlipala <adam@chlipala.net>
date Wed, 03 Dec 2014 21:06:15 -0500
parents 04d7d563a36f
children 0d48cfb59b29
line wrap: on
line diff
--- a/src/mono_reduce.sml	Tue Nov 25 08:21:09 2014 -0500
+++ b/src/mono_reduce.sml	Wed Dec 03 21:06:15 2014 -0500
@@ -208,6 +208,20 @@
         else
             No
 
+      | (PPrim (Prim.String (_, s)), _) =>
+        let
+            fun lengthLb (e : exp) =
+                case #1 e of
+                    EStrcat (e1, e2) => lengthLb e1 + lengthLb e2
+                  | EPrim (Prim.String (_, s)) => size s
+                  | _ => 0
+        in
+            if lengthLb e > size s then
+                No
+            else
+                Maybe
+        end
+
       | (PCon (_, PConVar n1, po), ECon (_, PConVar n2, eo)) =>
         if n1 = n2 then
             case (po, eo) of