diff options
| author |  Adam Chlipala <adamc@hcoop.net> | 2009-04-07 12:24:31 -0400 |
|---|---|---|
| committer | Adam Chlipala <adamc@hcoop.net> | 2009-04-07 12:24:31 -0400 |
| commit | b872b8f181d7f5d1917dc0e4802f8741c976215d (patch) | |
| tree | b422a6ade536f96b318a9d9547f2f2c95562691a /src/pathcheck.sml | |
| parent | 84bbd76f640d3e7718c090e229bb05d5f5e49eac (diff) | |
UNIQUE constraints
Diffstat (limited to 'src/pathcheck.sml')
| -rw-r--r-- | src/pathcheck.sml | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/src/pathcheck.sml b/src/pathcheck.sml index 036d286f..6771e628 100644 --- a/src/pathcheck.sml +++ b/src/pathcheck.sml @@ -38,6 +38,13 @@ structure SS = BinarySetFn(struct 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) @@ -46,14 +53,27 @@ fun checkDecl ((d, loc), (funcs, rels)) = (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)) + DExport (_, s, _, _, _) => doFunc s - | DTable (s, _) => doRel 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) |