summaryrefslogtreecommitdiff
path: root/src/pathcheck.sml
diff options
context:
space:
mode:
Diffstat (limited to 'src/pathcheck.sml')
-rw-r--r--src/pathcheck.sml64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/pathcheck.sml b/src/pathcheck.sml
new file mode 100644
index 00000000..ed6a4124
--- /dev/null
+++ b/src/pathcheck.sml
@@ -0,0 +1,64 @@
+(* Copyright (c) 2008, 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 PathCheck :> PATH_CHECK = struct
+
+open Mono
+
+structure E = ErrorMsg
+
+structure SS = BinarySetFn(struct
+ type ord_key = string
+ val compare = String.compare
+ end)
+
+fun checkDecl ((d, loc), (funcs, rels)) =
+ let
+ fun doRel s =
+ (if SS.member (rels, s) then
+ E.errorAt loc ("Duplicate table/sequence path " ^ s)
+ else
+ ();
+ (funcs, SS.add (rels, s)))
+ in
+ case d of
+ DExport (_, s, _, _) =>
+ (if SS.member (funcs, s) then
+ E.errorAt loc ("Duplicate function path " ^ s)
+ else
+ ();
+ (SS.add (funcs, s), rels))
+
+ | DTable (s, _) => doRel s
+ | DSequence s => doRel s
+
+ | _ => (funcs, rels)
+ end
+
+fun check ds = ignore (foldl checkDecl (SS.empty, SS.empty) ds)
+
+end