diff options
author | Adam Chlipala <adamc@hcoop.net> | 2008-01-26 14:27:33 -0500 |
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committer | Adam Chlipala <adamc@hcoop.net> | 2008-01-26 14:27:33 -0500 |
commit | 485f8c00cc43334ba7bb429a830eb3b651ff92f6 (patch) | |
tree | 913a8df05a3ab93ceeef1b559904bdfcf8c57dda /src/elab_util.sml | |
parent | 28605345c88491627b7a34cea6e50c9e5b9b8b01 (diff) |
Start of elaboration
Diffstat (limited to 'src/elab_util.sml')
-rw-r--r-- | src/elab_util.sml | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/elab_util.sml b/src/elab_util.sml new file mode 100644 index 00000000..8a0463cf --- /dev/null +++ b/src/elab_util.sml @@ -0,0 +1,78 @@ +(* 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 ElabUtil :> ELAB_UTIL = struct + +open Elab + +structure S = Search + +structure Kind = struct + +fun mapfold (f : (Elab.kind', 'state, 'abort) S.mapfold_arg) : (Elab.kind, 'state, 'abort) S.mapfolder = + let + fun mfk k acc = + S.bindP (mfk' k acc, f) + + and mfk' (kAll as (k, loc)) = + case k of + KType => S.return2 kAll + + | KArrow (k1, k2) => + S.bind2 (mfk k1, + fn k1' => + S.map2 (mfk k2, + fn k2' => + (KArrow (k1', k2'), loc))) + + | KName => S.return2 kAll + + | KRecord k => + S.map2 (mfk k, + fn k' => + (KRecord k', loc)) + + | KError => S.return2 kAll + + | KUnif (_, ref (SOME k)) => mfk' k + | KUnif _ => S.return2 kAll + in + mfk + end + +fun exists f k = + case mapfold (fn (k, ()) => + if f k then + S.Return () + else + S.Continue (k, ())) k () of + S.Return _ => true + | S.Continue _ => false + +end + +end |