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Diffstat (limited to 'src/pathcheck.sml')
| -rw-r--r-- | src/pathcheck.sml | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/pathcheck.sml b/src/pathcheck.sml new file mode 100644 index 0000000..3533032 --- /dev/null +++ b/src/pathcheck.sml @@ -0,0 +1,115 @@ +(* 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, cookies, styles)) = + let + fun doFunc s = + (if SS.member (funcs, s) then + E.errorAt loc ("Duplicate function path " ^ s) + else + (); + (SS.add (funcs, s), rels, cookies, styles)) + + fun doRel s = + (if SS.member (rels, s) then + E.errorAt loc ("Duplicate table/sequence path " ^ s) + else + (); + (funcs, SS.add (rels, s), cookies, styles)) + + fun doCookie s = + (if SS.member (cookies, s) then + E.errorAt loc ("Duplicate cookie path " ^ s) + else + (); + (funcs, rels, SS.add (cookies, s), styles)) + + fun doStyle s = + (if SS.member (styles, s) then + E.errorAt loc ("Duplicate style path " ^ s) + else + (); + (funcs, rels, cookies, SS.add (styles, s))) + in + case d of + DExport (_, s, _, _, _, _) => doFunc s + + | DTable (s, _, pe, ce) => + 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 + + val rels = #2 (doRel s) + val rels = case #1 pe of + EPrim (Prim.String (_, "")) => rels + | _ => + let + val s' = s ^ "_Pkey" + in + if SS.member (rels, s') then + E.errorAt loc ("Duplicate primary key constraint path " ^ s') + else + (); + SS.add (rels, s') + end + in + (funcs, constraints (ce, rels), cookies, styles) + end + | DSequence s => doRel s + + | DCookie s => doCookie s + | DStyle s => doStyle s + + | _ => (funcs, rels, cookies, styles) + end + +fun check (ds, _) = ignore (foldl checkDecl (SS.empty, SS.empty, SS.empty, SS.empty) ds) + +end |