--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/sidecheck.sml	Mon Nov 14 09:15:10 2011 -0500
@@ -0,0 +1,59 @@
+(* Copyright (c) 2011, Adam Chlipala
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ * - The names of contributors may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+structure SideCheck :> SIDE_CHECK = struct
+
+open Mono
+
+structure E = ErrorMsg
+
+structure FS = BinarySetFn(struct
+                           type ord_key = string * string
+                           fun compare ((x1, y1), (x2, y2)) = Order.join (String.compare (x1, x2),
+                                                                          fn () => String.compare (y1, y2))
+                           end)
+
+fun check ds =
+    let
+        val fs = MonoUtil.File.fold {typ = fn (_, fs) => fs,
+                                     exp = fn (e, fs) =>
+                                              case e of
+                                                  EFfi k => FS.add (fs, k)
+                                                | EFfiApp (k1, k2, _) => FS.add (fs, (k1, k2))
+                                                | _ => fs,
+                                     decl = fn (_, fs) => fs}
+                                    FS.empty ds
+    in
+        FS.app (fn k as (k1, k2) =>
+                   if Settings.isClientOnly k then
+                       E.error ("Server-side code uses client-side-only identifier \"" ^ k1 ^ "." ^ k2 ^ "\"")
+                   else
+                       ()) fs;
+        ds
+    end
+
+end