From 549b3c11b75bb08eb6b686d2d1a04bc0ec7647a9 Mon Sep 17 00:00:00 2001
From: Adam Chlipala <adamc@hcoop.net>
Date: Thu, 11 Sep 2008 12:22:06 -0400
Subject: Improve detection of opportunities for prepared statements with bool
 parameters

---
 src/prepare.sml | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/prepare.sml')

diff --git a/src/prepare.sml b/src/prepare.sml
index a6b6a4f3..20a09c9b 100644
--- a/src/prepare.sml
+++ b/src/prepare.sml
@@ -45,6 +45,12 @@ fun prepString (e, ss, n) =
         SOME ("$" ^ Int.toString (n + 1) ^ "::text" :: ss, n + 1)
       | EFfiApp ("Basis", "sqlifyBool", [e]) =>
         SOME ("$" ^ Int.toString (n + 1) ^ "::bool" :: ss, n + 1)
+      | ECase (e,
+               [((PCon (_, PConFfi {mod = "Basis", con = "True", ...}, _), _),
+                 (EPrim (Prim.String "TRUE"), _)),
+                ((PCon (_, PConFfi {mod = "Basis", con = "False", ...}, _), _),
+                 (EPrim (Prim.String "FALSE"), _))],
+               _) => SOME ("$" ^ Int.toString (n + 1) ^ "::bool" :: ss, n + 1)
 
       | _ => NONE
 
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