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(* 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 doFunc s =
(if SS.member (funcs, s) then
E.errorAt loc ("Duplicate function path " ^ s)
else
();
(SS.add (funcs, s), rels))
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, _, _, _) => doFunc s
| DTable (s, _, e) =>
let
fun constraints (e, rels) =
case #1 e of
ERecord [(s', _, _)] =>
let
val s' = s ^ "_" ^ s'
in
if SS.member (rels, s') then
E.errorAt loc ("Duplicate constraint path " ^ s')
else
();
SS.add (rels, s')
end
| EStrcat (e1, e2) => constraints (e2, constraints (e1, rels))
| _ => rels
in
(funcs, constraints (e, #2 (doRel s)))
end
| DSequence s => doRel s
| _ => (funcs, rels)
end
fun check ds = ignore (foldl checkDecl (SS.empty, SS.empty) ds)
end
|
