Ur/Web: src/elaborate.sml annotate

annotate src/elaborate.sml @ 1505:8c851e5508a7

Tutorial: up to First-Class Polymorphism

author	Adam Chlipala <adam@chlipala.net>
date	Sun, 17 Jul 2011 11:00:04 -0400
parents	18d18a70821e
children	cccf8bf64b30

rev	line source
adamc@1191	1 (* Copyright (c) 2008-2010, Adam Chlipala
adamc@445	2 * All rights reserved.
adamc@445	3 *
adamc@445	4 * Redistribution and use in source and binary forms, with or without
adamc@445	5 * modification, are permitted provided that the following conditions are met:
adamc@445	6 *
adamc@445	7 * - Redistributions of source code must retain the above copyright notice,
adamc@445	8 * this list of conditions and the following disclaimer.
adamc@445	9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445	10 * this list of conditions and the following disclaimer in the documentation
adamc@445	11 * and/or other materials provided with the distribution.
adamc@445	12 * - The names of contributors may not be used to endorse or promote products
adamc@445	13 * derived from this software without specific prior written permission.
adamc@445	14 *
adamc@445	15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445	16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445	17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445	18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445	19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445	20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445	21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445	22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445	23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445	24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445	25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445	26 *)
adamc@403	27
adamc@403	28 structure Elaborate :> ELABORATE = struct
adamc@403	29
adamc@403	30 structure P = Prim
adamc@403	31 structure L = Source
adamc@403	32 structure L' = Elab
adamc@403	33 structure E = ElabEnv
adamc@403	34 structure U = ElabUtil
adamc@403	35 structure D = Disjoint
adamc@403	36
adamc@403	37 open Print
adamc@403	38 open ElabPrint
adamc@403	39 open ElabErr
adamc@403	40
adamc@819	41 structure IS = IntBinarySet
adamc@403	42 structure IM = IntBinaryMap
adamc@403	43
adamc@403	44 structure SK = struct
adamc@403	45 type ord_key = string
adamc@403	46 val compare = String.compare
adamc@403	47 end
adamc@403	48
adamc@403	49 structure SS = BinarySetFn(SK)
adamc@403	50 structure SM = BinaryMapFn(SK)
adamc@403	51
adamc@403	52 val basis_r = ref 0
adamc@633	53 val top_r = ref 0
adamc@403	54
adamc@403	55 fun elabExplicitness e =
adamc@403	56 case e of
adamc@403	57 L.Explicit => L'.Explicit
adamc@403	58 \| L.Implicit => L'.Implicit
adamc@403	59
adamc@403	60 fun occursKind r =
adamc@403	61 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403	62 \| _ => false)
adamc@403	63
adamc@403	64 exception KUnify' of kunify_error
adamc@403	65
adamc@623	66 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403	67 let
adamc@403	68 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403	69 in
adamc@403	70 case (k1, k2) of
adamc@403	71 (L'.KType, L'.KType) => ()
adamc@403	72 \| (L'.KUnit, L'.KUnit) => ()
adamc@403	73
adamc@403	74 \| (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623	75 (unifyKinds' env d1 d2;
adamc@623	76 unifyKinds' env r1 r2)
adamc@403	77 \| (L'.KName, L'.KName) => ()
adamc@623	78 \| (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403	79 \| (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623	80 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403	81 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403	82
adamc@623	83 \| (L'.KRel n1, L'.KRel n2) =>
adamc@623	84 if n1 = n2 then
adamc@623	85 ()
adamc@623	86 else
adamc@623	87 err KIncompatible
adamc@623	88 \| (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623	89 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623	90
adamc@403	91 \| (L'.KError, _) => ()
adamc@403	92 \| (_, L'.KError) => ()
adamc@403	93
adamc@623	94 \| (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' env k1All k2All
adamc@623	95 \| (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' env k1All k2All
adamc@403	96
adam@1302	97 \| (L'.KTupleUnif (_, _, ref (SOME k)), _) => unifyKinds' env k k2All
adam@1302	98 \| (_, L'.KTupleUnif (_, _, ref (SOME k))) => unifyKinds' env k1All k
adam@1302	99
adamc@403	100 \| (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403	101 if r1 = r2 then
adamc@403	102 ()
adamc@403	103 else
adamc@403	104 r1 := SOME k2All
adamc@403	105
adamc@403	106 \| (L'.KUnif (_, _, r), _) =>
adamc@403	107 if occursKind r k2All then
adamc@403	108 err KOccursCheckFailed
adamc@403	109 else
adamc@403	110 r := SOME k2All
adamc@403	111 \| (_, L'.KUnif (_, _, r)) =>
adamc@403	112 if occursKind r k1All then
adamc@403	113 err KOccursCheckFailed
adamc@403	114 else
adamc@403	115 r := SOME k1All
adamc@403	116
adam@1302	117 \| (L'.KTupleUnif (_, nks, r), L'.KTuple ks) =>
adam@1302	118 ((app (fn (n, k) => unifyKinds' env k (List.nth (ks, n-1))) nks;
adam@1302	119 r := SOME k2All)
adam@1302	120 handle Subscript => err KIncompatible)
adam@1302	121 \| (L'.KTuple ks, L'.KTupleUnif (_, nks, r)) =>
adam@1302	122 ((app (fn (n, k) => unifyKinds' env (List.nth (ks, n-1)) k) nks;
adam@1302	123 r := SOME k1All)
adam@1302	124 handle Subscript => err KIncompatible)
adam@1302	125 \| (L'.KTupleUnif (loc, nks1, r1), L'.KTupleUnif (_, nks2, r2)) =>
adam@1302	126 let
adam@1302	127 val nks = foldl (fn (p as (n, k1), nks) =>
adam@1302	128 case ListUtil.search (fn (n', k2) =>
adam@1302	129 if n' = n then
adam@1302	130 SOME k2
adam@1302	131 else
adam@1302	132 NONE) nks2 of
adam@1302	133 NONE => p :: nks
adam@1302	134 \| SOME k2 => (unifyKinds' env k1 k2;
adam@1302	135 nks)) nks2 nks1
adam@1302	136
adam@1302	137 val k = (L'.KTupleUnif (loc, nks, ref NONE), loc)
adam@1302	138 in
adam@1302	139 r1 := SOME k;
adam@1302	140 r2 := SOME k
adam@1302	141 end
adam@1302	142
adamc@403	143 \| _ => err KIncompatible
adamc@403	144 end
adamc@403	145
adamc@403	146 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403	147
adamc@623	148 fun unifyKinds env k1 k2 =
adamc@623	149 unifyKinds' env k1 k2
adamc@403	150 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403	151
adamc@403	152 fun checkKind env c k1 k2 =
adamc@623	153 unifyKinds env k1 k2
adamc@403	154 handle KUnify (k1, k2, err) =>
adamc@403	155 conError env (WrongKind (c, k1, k2, err))
adamc@403	156
adamc@403	157 val dummy = ErrorMsg.dummySpan
adamc@403	158
adamc@403	159 val ktype = (L'.KType, dummy)
adamc@403	160 val kname = (L'.KName, dummy)
adamc@403	161 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403	162
adamc@403	163 val cerror = (L'.CError, dummy)
adamc@403	164 val kerror = (L'.KError, dummy)
adamc@403	165 val eerror = (L'.EError, dummy)
adamc@403	166 val sgnerror = (L'.SgnError, dummy)
adamc@403	167 val strerror = (L'.StrError, dummy)
adamc@403	168
adamc@403	169 val int = ref cerror
adamc@403	170 val float = ref cerror
adamc@403	171 val string = ref cerror
adamc@821	172 val char = ref cerror
adamc@403	173 val table = ref cerror
adamc@403	174
adamc@403	175 local
adamc@403	176 val count = ref 0
adamc@403	177 in
adamc@403	178
adamc@403	179 fun resetKunif () = count := 0
adamc@403	180
adamc@403	181 fun kunif loc =
adamc@403	182 let
adamc@403	183 val n = !count
adamc@403	184 val s = if n <= 26 then
adamc@403	185 str (chr (ord #"A" + n))
adamc@403	186 else
adamc@403	187 "U" ^ Int.toString (n - 26)
adamc@403	188 in
adamc@403	189 count := n + 1;
adamc@838	190 (L'.KUnif (loc, s, ref NONE), loc)
adamc@403	191 end
adamc@403	192
adamc@403	193 end
adamc@403	194
adamc@403	195 local
adamc@403	196 val count = ref 0
adamc@403	197 in
adamc@403	198
adamc@403	199 fun resetCunif () = count := 0
adamc@403	200
adamc@403	201 fun cunif (loc, k) =
adamc@403	202 let
adamc@403	203 val n = !count
adamc@712	204 val s = if n < 26 then
adamc@403	205 str (chr (ord #"A" + n))
adamc@403	206 else
adamc@403	207 "U" ^ Int.toString (n - 26)
adamc@403	208 in
adamc@403	209 count := n + 1;
adam@1303	210 (L'.CUnif (0, loc, k, s, ref NONE), loc)
adamc@403	211 end
adamc@403	212
adamc@403	213 end
adamc@403	214
adamc@623	215 fun elabKind env (k, loc) =
adamc@403	216 case k of
adamc@403	217 L.KType => (L'.KType, loc)
adamc@623	218 \| L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403	219 \| L.KName => (L'.KName, loc)
adamc@623	220 \| L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403	221 \| L.KUnit => (L'.KUnit, loc)
adamc@623	222 \| L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adamc@403	223 \| L.KWild => kunif loc
adamc@403	224
adamc@623	225 \| L.KVar s => (case E.lookupK env s of
adamc@623	226 NONE =>
adamc@623	227 (kindError env (UnboundKind (loc, s));
adamc@623	228 kerror)
adamc@623	229 \| SOME n => (L'.KRel n, loc))
adamc@623	230 \| L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623	231
adamc@621	232 fun mapKind (dom, ran, loc)=
adamc@621	233 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621	234 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621	235 (L'.KRecord ran, loc)), loc)), loc)
adamc@403	236
adamc@403	237 fun hnormKind (kAll as (k, _)) =
adamc@403	238 case k of
adamc@403	239 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403	240 \| _ => kAll
adamc@403	241
adamc@623	242 open ElabOps
adamc@623	243
adamc@623	244 fun elabConHead (c as (_, loc)) k =
adamc@623	245 let
adamc@623	246 fun unravel (k, c) =
adamc@623	247 case hnormKind k of
adamc@623	248 (L'.KFun (x, k'), _) =>
adamc@623	249 let
adamc@623	250 val u = kunif loc
adamc@623	251
adamc@623	252 val k'' = subKindInKind (0, u) k'
adamc@623	253 in
adamc@623	254 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623	255 end
adamc@623	256 \| _ => (c, k)
adamc@623	257 in
adamc@623	258 unravel (k, c)
adamc@623	259 end
adamc@623	260
adamc@403	261 fun elabCon (env, denv) (c, loc) =
adamc@403	262 case c of
adamc@403	263 L.CAnnot (c, k) =>
adamc@403	264 let
adamc@623	265 val k' = elabKind env k
adamc@403	266 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	267 in
adamc@403	268 checkKind env c' ck k';
adamc@403	269 (c', k', gs)
adamc@403	270 end
adamc@403	271
adamc@403	272 \| L.TFun (t1, t2) =>
adamc@403	273 let
adamc@403	274 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403	275 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403	276 in
adamc@403	277 checkKind env t1' k1 ktype;
adamc@403	278 checkKind env t2' k2 ktype;
adamc@403	279 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403	280 end
adamc@403	281 \| L.TCFun (e, x, k, t) =>
adamc@403	282 let
adamc@403	283 val e' = elabExplicitness e
adamc@623	284 val k' = elabKind env k
adamc@403	285 val env' = E.pushCRel env x k'
adamc@403	286 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	287 in
adamc@403	288 checkKind env t' tk ktype;
adamc@403	289 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403	290 end
adamc@623	291 \| L.TKFun (x, t) =>
adamc@623	292 let
adamc@623	293 val env' = E.pushKRel env x
adamc@623	294 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	295 in
adamc@623	296 checkKind env t' tk ktype;
adamc@623	297 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623	298 end
adamc@628	299 \| L.TDisjoint (c1, c2, c) =>
adamc@403	300 let
adamc@403	301 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	302 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403	303
adamc@403	304 val ku1 = kunif loc
adamc@403	305 val ku2 = kunif loc
adamc@403	306
adamc@628	307 val denv' = D.assert env denv (c1', c2')
adamc@403	308 val (c', k, gs4) = elabCon (env, denv') c
adamc@403	309 in
adamc@403	310 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403	311 checkKind env c2' k2 (L'.KRecord ku2, loc);
adam@1351	312 checkKind env c' k (L'.KType, loc);
adamc@403	313
adamc@628	314 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403	315 end
adamc@403	316 \| L.TRecord c =>
adamc@403	317 let
adamc@403	318 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	319 val k = (L'.KRecord ktype, loc)
adamc@403	320 in
adamc@403	321 checkKind env c' ck k;
adamc@403	322 ((L'.TRecord c', loc), ktype, gs)
adamc@403	323 end
adamc@403	324
adamc@403	325 \| L.CVar ([], s) =>
adamc@403	326 (case E.lookupC env s of
adamc@403	327 E.NotBound =>
adamc@403	328 (conError env (UnboundCon (loc, s));
adamc@403	329 (cerror, kerror, []))
adamc@403	330 \| E.Rel (n, k) =>
adamc@623	331 let
adamc@623	332 val (c, k) = elabConHead (L'.CRel n, loc) k
adamc@623	333 in
adamc@623	334 (c, k, [])
adamc@623	335 end
adamc@403	336 \| E.Named (n, k) =>
adamc@623	337 let
adamc@623	338 val (c, k) = elabConHead (L'.CNamed n, loc) k
adamc@623	339 in
adamc@623	340 (c, k, [])
adamc@623	341 end)
adamc@403	342 \| L.CVar (m1 :: ms, s) =>
adamc@403	343 (case E.lookupStr env m1 of
adamc@403	344 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403	345 (cerror, kerror, []))
adamc@403	346 \| SOME (n, sgn) =>
adamc@403	347 let
adamc@403	348 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	349 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	350 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403	351 (strerror, sgnerror))
adamc@403	352 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	353 ((L'.StrVar n, loc), sgn) ms
adamc@403	354
adamc@403	355 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403	356 NONE => (conError env (UnboundCon (loc, s));
adamc@403	357 kerror)
adamc@403	358 \| SOME (k, _) => k
adamc@987	359 val (c, k) = elabConHead (L'.CModProj (n, ms, s), loc) k
adamc@403	360 in
adamc@987	361 (c, k, [])
adamc@403	362 end)
adamc@403	363
adamc@403	364 \| L.CApp (c1, c2) =>
adamc@403	365 let
adamc@403	366 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	367 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403	368 val dom = kunif loc
adamc@403	369 val ran = kunif loc
adamc@403	370 in
adamc@403	371 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403	372 checkKind env c2' k2 dom;
adamc@403	373 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403	374 end
adamc@403	375 \| L.CAbs (x, ko, t) =>
adamc@403	376 let
adamc@403	377 val k' = case ko of
adamc@403	378 NONE => kunif loc
adamc@623	379 \| SOME k => elabKind env k
adamc@403	380 val env' = E.pushCRel env x k'
adamc@403	381 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	382 in
adamc@403	383 ((L'.CAbs (x, k', t'), loc),
adamc@403	384 (L'.KArrow (k', tk), loc),
adamc@403	385 gs)
adamc@403	386 end
adamc@623	387 \| L.CKAbs (x, t) =>
adamc@623	388 let
adamc@623	389 val env' = E.pushKRel env x
adamc@623	390 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	391 in
adamc@623	392 ((L'.CKAbs (x, t'), loc),
adamc@623	393 (L'.KFun (x, tk), loc),
adamc@623	394 gs)
adamc@623	395 end
adamc@403	396
adamc@403	397 \| L.CName s =>
adamc@403	398 ((L'.CName s, loc), kname, [])
adamc@403	399
adamc@403	400 \| L.CRecord xcs =>
adamc@403	401 let
adamc@403	402 val k = kunif loc
adamc@403	403
adamc@403	404 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403	405 let
adamc@403	406 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403	407 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403	408 in
adamc@403	409 checkKind env x' xk kname;
adamc@403	410 checkKind env c' ck k;
adamc@403	411 ((x', c'), gs1 @ gs2 @ gs)
adamc@403	412 end) [] xcs
adamc@403	413
adamc@403	414 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403	415 (* Add duplicate field checking later. *)
adamc@403	416
adamc@403	417 fun prove (xcs, ds) =
adamc@403	418 case xcs of
adamc@403	419 [] => ds
adamc@403	420 \| xc :: rest =>
adamc@403	421 let
adamc@403	422 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403	423 val ds = foldl (fn (xc', ds) =>
adamc@403	424 let
adamc@403	425 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403	426 in
adamc@403	427 D.prove env denv (r1, r2, loc) @ ds
adamc@403	428 end)
adamc@403	429 ds rest
adamc@403	430 in
adamc@403	431 prove (rest, ds)
adamc@403	432 end
adamc@403	433 in
adamc@403	434 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403	435 end
adamc@403	436 \| L.CConcat (c1, c2) =>
adamc@403	437 let
adamc@403	438 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	439 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403	440 val ku = kunif loc
adamc@403	441 val k = (L'.KRecord ku, loc)
adamc@403	442 in
adamc@403	443 checkKind env c1' k1 k;
adamc@403	444 checkKind env c2' k2 k;
adamc@403	445 ((L'.CConcat (c1', c2'), loc), k,
adamc@403	446 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403	447 end
adamc@621	448 \| L.CMap =>
adamc@403	449 let
adamc@403	450 val dom = kunif loc
adamc@403	451 val ran = kunif loc
adamc@403	452 in
adamc@621	453 ((L'.CMap (dom, ran), loc),
adamc@621	454 mapKind (dom, ran, loc),
adamc@403	455 [])
adamc@403	456 end
adamc@403	457
adamc@403	458 \| L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403	459
adamc@403	460 \| L.CTuple cs =>
adamc@403	461 let
adamc@403	462 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403	463 let
adamc@403	464 val (c', k, gs') = elabCon (env, denv) c
adamc@403	465 in
adamc@403	466 (c' :: cs', k :: ks, gs' @ gs)
adamc@403	467 end) ([], [], []) cs
adamc@403	468 in
adamc@403	469 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403	470 end
adamc@403	471 \| L.CProj (c, n) =>
adamc@403	472 let
adamc@403	473 val (c', k, gs) = elabCon (env, denv) c
adam@1302	474
adam@1302	475 val k' = kunif loc
adamc@403	476 in
adam@1302	477 if n <= 0 then
adam@1302	478 (conError env (ProjBounds (c', n));
adam@1302	479 (cerror, kerror, []))
adam@1302	480 else
adam@1302	481 (checkKind env c' k (L'.KTupleUnif (loc, [(n, k')], ref NONE), loc);
adam@1302	482 ((L'.CProj (c', n), loc), k', gs))
adamc@403	483 end
adamc@403	484
adamc@403	485 \| L.CWild k =>
adamc@403	486 let
adamc@623	487 val k' = elabKind env k
adamc@403	488 in
adamc@403	489 (cunif (loc, k'), k', [])
adamc@403	490 end
adamc@403	491
adamc@403	492 fun kunifsRemain k =
adamc@403	493 case k of
adamc@403	494 L'.KUnif (_, _, ref NONE) => true
adam@1302	495 \| L'.KTupleUnif (_, _, ref NONE) => true
adamc@403	496 \| _ => false
adamc@403	497 fun cunifsRemain c =
adamc@403	498 case c of
adam@1326	499 L'.CUnif (_, loc, k, _, r as ref NONE) =>
adam@1326	500 (case #1 (hnormKind k) of
adam@1326	501 L'.KUnit => (r := SOME (L'.CUnit, loc); NONE)
adam@1326	502 \| _ => SOME loc)
adamc@403	503 \| _ => NONE
adamc@403	504
adamc@403	505 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403	506 con = fn _ => false,
adamc@403	507 exp = fn _ => false,
adamc@403	508 sgn_item = fn _ => false,
adamc@403	509 sgn = fn _ => false,
adamc@403	510 str = fn _ => false,
adamc@403	511 decl = fn _ => false}
adamc@403	512
adamc@403	513 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@403	514 con = cunifsRemain,
adamc@403	515 exp = fn _ => NONE,
adamc@403	516 sgn_item = fn _ => NONE,
adamc@403	517 sgn = fn _ => NONE,
adamc@403	518 str = fn _ => NONE,
adamc@403	519 decl = fn _ => NONE}
adamc@403	520
adamc@403	521 fun occursCon r =
adamc@403	522 U.Con.exists {kind = fn _ => false,
adam@1303	523 con = fn L'.CUnif (_, _, _, _, r') => r = r'
adamc@403	524 \| _ => false}
adamc@403	525
adamc@403	526 exception CUnify' of cunify_error
adamc@403	527
adamc@403	528 type record_summary = {
adamc@403	529 fields : (L'.con * L'.con) list,
adamc@403	530 unifs : (L'.con * L'.con option ref) list,
adamc@403	531 others : L'.con list
adamc@403	532 }
adamc@403	533
adamc@403	534 fun summaryToCon {fields, unifs, others} =
adamc@403	535 let
adamc@403	536 val c = (L'.CRecord (ktype, []), dummy)
adamc@403	537 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403	538 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403	539 in
adamc@403	540 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403	541 end
adamc@403	542
adamc@403	543 fun p_summary env s = p_con env (summaryToCon s)
adamc@403	544
adamc@403	545 exception CUnify of L'.con * L'.con * cunify_error
adamc@403	546
adamc@403	547 fun kindof env (c, loc) =
adamc@403	548 case c of
adamc@403	549 L'.TFun _ => ktype
adamc@403	550 \| L'.TCFun _ => ktype
adamc@403	551 \| L'.TRecord _ => ktype
adamc@628	552 \| L'.TDisjoint _ => ktype
adamc@403	553
adamc@403	554 \| L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403	555 \| L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403	556 \| L'.CModProj (n, ms, x) =>
adamc@403	557 let
adamc@403	558 val (_, sgn) = E.lookupStrNamed env n
adamc@403	559 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	560 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	561 NONE => raise Fail "kindof: Unknown substructure"
adamc@403	562 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	563 ((L'.StrVar n, loc), sgn) ms
adamc@403	564 in
adamc@403	565 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403	566 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403	567 \| SOME (k, _) => k
adamc@403	568 end
adamc@403	569
adamc@403	570 \| L'.CApp (c, _) =>
adamc@403	571 (case hnormKind (kindof env c) of
adamc@403	572 (L'.KArrow (_, k), _) => k
adamc@403	573 \| (L'.KError, _) => kerror
adamc@413	574 \| k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403	575 \| L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628	576
adamc@403	577
adamc@403	578 \| L'.CName _ => kname
adamc@403	579
adamc@403	580 \| L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403	581 \| L'.CConcat (c, _) => kindof env c
adamc@621	582 \| L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403	583
adamc@403	584 \| L'.CUnit => (L'.KUnit, loc)
adamc@403	585
adamc@403	586 \| L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403	587 \| L'.CProj (c, n) =>
adamc@403	588 (case hnormKind (kindof env c) of
adamc@403	589 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adam@1311	590 \| (L'.KUnif (_, _, r), _) =>
adam@1311	591 let
adam@1311	592 val ku = kunif loc
adam@1311	593 val k = (L'.KTupleUnif (loc, [(n, ku)], ref NONE), loc)
adam@1311	594 in
adam@1311	595 r := SOME k;
adam@1311	596 k
adam@1311	597 end
adam@1311	598 \| (L'.KTupleUnif (_, nks, r), _) =>
adam@1311	599 (case ListUtil.search (fn (n', k) => if n' = n then SOME k else NONE) nks of
adam@1311	600 SOME k => k
adam@1311	601 \| NONE =>
adam@1311	602 let
adam@1311	603 val ku = kunif loc
adam@1311	604 val k = (L'.KTupleUnif (loc, ((n, ku) :: nks), ref NONE), loc)
adam@1311	605 in
adam@1311	606 r := SOME k;
adam@1311	607 k
adam@1311	608 end)
adamc@413	609 \| k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403	610
adamc@403	611 \| L'.CError => kerror
adam@1303	612 \| L'.CUnif (_, _, k, _, _) => k
adamc@403	613
adamc@623	614 \| L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623	615 \| L'.CKApp (c, k) =>
adamc@623	616 (case hnormKind (kindof env c) of
adamc@623	617 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623	618 \| k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623	619 \| L'.TKFun _ => ktype
adamc@403	620
adamc@621	621 exception GuessFailure
adamc@403	622
adamc@513	623 fun isUnitCon env (c, loc) =
adamc@513	624 case c of
adamc@513	625 L'.TFun _ => false
adamc@513	626 \| L'.TCFun _ => false
adamc@513	627 \| L'.TRecord _ => false
adamc@628	628 \| L'.TDisjoint _ => false
adamc@513	629
adam@1316	630 \| L'.CRel xn => #1 (hnormKind (#2 (E.lookupCRel env xn))) = L'.KUnit
adam@1316	631 \| L'.CNamed xn => #1 (hnormKind (#2 (E.lookupCNamed env xn))) = L'.KUnit
adamc@518	632 \| L'.CModProj (n, ms, x) => false
adamc@518	633 (*let
adamc@513	634 val (_, sgn) = E.lookupStrNamed env n
adamc@513	635 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513	636 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513	637 NONE => raise Fail "kindof: Unknown substructure"
adamc@513	638 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513	639 ((L'.StrVar n, loc), sgn) ms
adamc@513	640 in
adamc@513	641 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513	642 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513	643 \| SOME ((k, _), _) => k = L'.KUnit
adamc@518	644 end*)
adamc@518	645
adamc@518	646 \| L'.CApp (c, _) => false
adamc@518	647 (*(case hnormKind (kindof env c) of
adamc@513	648 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513	649 \| (L'.KError, _) => false
adamc@518	650 \| k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513	651 \| L'.CAbs _ => false
adamc@513	652
adamc@513	653 \| L'.CName _ => false
adamc@513	654
adamc@513	655 \| L'.CRecord _ => false
adamc@513	656 \| L'.CConcat _ => false
adamc@621	657 \| L'.CMap _ => false
adamc@513	658
adamc@513	659 \| L'.CUnit => true
adamc@513	660
adamc@513	661 \| L'.CTuple _ => false
adamc@518	662 \| L'.CProj (c, n) => false
adamc@518	663 (*(case hnormKind (kindof env c) of
adamc@513	664 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518	665 \| k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513	666
adamc@513	667 \| L'.CError => false
adam@1316	668 \| L'.CUnif (_, _, k, _, _) => #1 (hnormKind k) = L'.KUnit
adamc@513	669
adamc@623	670 \| L'.CKAbs _ => false
adamc@623	671 \| L'.CKApp _ => false
adamc@623	672 \| L'.TKFun _ => false
adamc@623	673
adamc@709	674 val recdCounter = ref 0
adamc@709	675
adamc@713	676 val mayDelay = ref false
adamc@777	677 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777	678
adamc@830	679 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830	680
adam@1304	681 exception CantSquish
adam@1304	682
adam@1304	683 fun squish by =
adam@1304	684 U.Con.mapB {kind = fn _ => fn k => k,
adam@1304	685 con = fn bound => fn c =>
adam@1304	686 case c of
adam@1304	687 L'.CRel xn =>
adam@1304	688 if xn < bound then
adam@1304	689 c
adam@1304	690 else if bound <= xn andalso xn < bound + by then
adam@1304	691 raise CantSquish
adam@1304	692 else
adam@1304	693 L'.CRel (xn - by)
adam@1304	694 \| L'.CUnif _ => raise CantSquish
adam@1304	695 \| _ => c,
adam@1304	696 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1304	697 \| (bound, _) => bound} 0
adam@1304	698
adamc@777	699 fun unifyRecordCons env (loc, c1, c2) =
adamc@403	700 let
adamc@403	701 fun rkindof c =
adamc@403	702 case hnormKind (kindof env c) of
adamc@403	703 (L'.KRecord k, _) => k
adamc@403	704 \| (L'.KError, _) => kerror
adamc@753	705 \| (L'.KUnif (_, _, r), _) =>
adamc@753	706 let
adamc@753	707 val k = kunif (#2 c)
adamc@753	708 in
adamc@753	709 r := SOME (L'.KRecord k, #2 c);
adamc@753	710 k
adamc@753	711 end
adamc@413	712 \| k => raise CUnify' (CKindof (k, c, "record"))
adamc@403	713
adamc@403	714 val k1 = rkindof c1
adamc@403	715 val k2 = rkindof c2
adamc@403	716
adamc@628	717 val r1 = recordSummary env c1
adamc@628	718 val r2 = recordSummary env c2
adamc@403	719 in
adamc@623	720 unifyKinds env k1 k2;
adamc@777	721 unifySummaries env (loc, k1, r1, r2)
adamc@403	722 end
adamc@403	723
adamc@777	724 and normalizeRecordSummary env (r : record_summary) =
adamc@777	725 recordSummary env (summaryToCon r)
adamc@777	726
adamc@628	727 and recordSummary env c =
adamc@403	728 let
adamc@628	729 val c = hnormCon env c
adamc@628	730
adamc@628	731 val sum =
adamc@403	732 case c of
adamc@628	733 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403	734 \| (L'.CConcat (c1, c2), _) =>
adamc@403	735 let
adamc@628	736 val s1 = recordSummary env c1
adamc@628	737 val s2 = recordSummary env c2
adamc@403	738 in
adamc@628	739 {fields = #fields s1 @ #fields s2,
adamc@628	740 unifs = #unifs s1 @ #unifs s2,
adamc@628	741 others = #others s1 @ #others s2}
adamc@403	742 end
adam@1303	743 \| (L'.CUnif (nl, _, _, _, ref (SOME c)), _) => recordSummary env (E.mliftConInCon nl c)
adam@1303	744 \| c' as (L'.CUnif (0, _, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628	745 \| c' => {fields = [], unifs = [], others = [c']}
adamc@403	746 in
adamc@628	747 sum
adamc@403	748 end
adamc@403	749
adamc@987	750 and consEq env loc (c1, c2) =
adamc@777	751 let
adamc@777	752 val mayDelay' = !mayDelay
adamc@777	753 in
adamc@777	754 (mayDelay := false;
adamc@987	755 unifyCons env loc c1 c2;
adamc@777	756 mayDelay := mayDelay';
adamc@777	757 true)
adamc@777	758 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777	759 end
adamc@403	760
adamc@403	761 and consNeq env (c1, c2) =
adamc@628	762 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403	763 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093	764 \| (L'.CName _, L'.CRel _) => true
adamc@1093	765 \| (L'.CRel _, L'.CName _) => true
adamc@1093	766 \| (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093	767 \| (L'.CRel _, L'.CNamed _) => true
adamc@1093	768 \| (L'.CNamed _, L'.CRel _) => true
adamc@1093	769 \| (L'.CRel _, L'.CModProj _) => true
adamc@1093	770 \| (L'.CModProj _, L'.CRel _) => true
adamc@1269	771 \| (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adamc@403	772 \| _ => false
adamc@403	773
adamc@777	774 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403	775 let
adamc@848	776 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1303	777 ("#1", p_summary env s1),
adam@1303	778 ("#2", p_summary env s2)]*)
adamc@403	779
adamc@403	780 fun eatMatching p (ls1, ls2) =
adamc@403	781 let
adamc@403	782 fun em (ls1, ls2, passed1) =
adamc@403	783 case ls1 of
adamc@403	784 [] => (rev passed1, ls2)
adamc@403	785 \| h1 :: t1 =>
adamc@403	786 let
adamc@403	787 fun search (ls2', passed2) =
adamc@403	788 case ls2' of
adamc@403	789 [] => em (t1, ls2, h1 :: passed1)
adamc@403	790 \| h2 :: t2 =>
adamc@403	791 if p (h1, h2) then
adamc@403	792 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403	793 else
adamc@403	794 search (t2, h2 :: passed2)
adamc@403	795 in
adamc@403	796 search (ls2, [])
adamc@403	797 end
adamc@403	798 in
adamc@403	799 em (ls1, ls2, [])
adamc@403	800 end
adamc@403	801
adamc@403	802 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403	803 not (consNeq env (x1, x2))
adamc@987	804 andalso consEq env loc (c1, c2)
adamc@987	805 andalso consEq env loc (x1, x2))
adamc@403	806 (#fields s1, #fields s2)
adamc@403	807 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403	808 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646	809
adamc@403	810 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646	811
adamc@987	812 val (others1, others2) = eatMatching (consEq env loc) (#others s1, #others s2)
adamc@403	813 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403	814 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	815
adamc@709	816 fun unsummarize {fields, unifs, others} =
adamc@709	817 let
adamc@709	818 val c = (L'.CRecord (k, fields), loc)
adamc@709	819
adamc@709	820 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709	821 c unifs
adamc@709	822 in
adamc@709	823 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709	824 c others
adamc@709	825 end
adamc@709	826
adamc@710	827 val empties = ([], [], [], [], [], [])
adamc@710	828
adamc@709	829 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709	830 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@709	831 orig as ([(_, r)], [], [], _, _, _) =>
adamc@709	832 let
adamc@709	833 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709	834 in
adamc@709	835 if occursCon r c then
adamc@709	836 orig
adamc@709	837 else
adamc@709	838 (r := SOME c;
adamc@710	839 empties)
adamc@709	840 end
adamc@709	841 \| orig as (_, _, _, [(_, r)], [], []) =>
adamc@709	842 let
adamc@709	843 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709	844 in
adamc@709	845 if occursCon r c then
adamc@709	846 orig
adamc@709	847 else
adamc@709	848 (r := SOME c;
adamc@710	849 empties)
adamc@709	850 end
adamc@710	851 \| orig as ([(_, r1 as ref NONE)], _, [], [(_, r2 as ref NONE)], _, []) =>
adamc@710	852 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710	853 let
adamc@838	854 val kr = (L'.KRecord k, loc)
adamc@710	855 val u = cunif (loc, kr)
adamc@710	856 in
adamc@710	857 r1 := SOME (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc);
adamc@710	858 r2 := SOME (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc);
adamc@710	859 empties
adamc@710	860 end
adamc@710	861 else
adamc@710	862 orig
adamc@709	863 \| orig => orig
adamc@709	864
adamc@403	865 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777	866 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	867
adamc@753	868 fun isGuessable (other, fs, unifs) =
adamc@753	869 let
adamc@753	870 val c = (L'.CRecord (k, fs), loc)
adamc@753	871 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753	872 in
adamc@987	873 (guessMap env loc (other, c, GuessFailure);
adamc@753	874 true)
adamc@753	875 handle GuessFailure => false
adamc@753	876 end
adamc@403	877
adamc@754	878 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753	879 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753	880 ([], _, [other1], [], [], _) =>
adamc@753	881 if isGuessable (other1, fs2, unifs2) then
adamc@754	882 ([], [], [], [], [], [])
adamc@403	883 else
adamc@754	884 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753	885 \| (_, [], [], [other2], _, []) =>
adamc@777	886 if isGuessable (other2, fs1, unifs1) then
adamc@777	887 ([], [], [], [], [], [])
adamc@777	888 else
adamc@777	889 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754	890 \| _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403	891
adamc@403	892 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646	893 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	894
adamc@838	895 val empty = (L'.CRecord (k, []), loc)
adamc@1071	896 fun failure () =
adamc@1071	897 let
adamc@1071	898 val fs2 = #fields s2
adamc@1071	899
adamc@1071	900 fun findPointwise fs1 =
adamc@1071	901 case fs1 of
adamc@1071	902 [] => NONE
adamc@1071	903 \| (nm1, c1) :: fs1 =>
adamc@1071	904 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071	905 NONE => findPointwise fs1
adamc@1071	906 \| SOME (_, c2) =>
adamc@1071	907 if consEq env loc (c1, c2) then
adamc@1071	908 findPointwise fs1
adamc@1071	909 else
adam@1359	910 SOME (nm1, c1, c2, (unifyCons env loc c1 c2; NONE) handle CUnify (_, _, err) => SOME err)
adamc@1071	911 in
adamc@1071	912 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071	913 end
adam@1341	914
adam@1341	915 fun default () = if !mayDelay then
adam@1341	916 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adam@1341	917 else
adam@1341	918 failure ()
adamc@709	919 in
adamc@777	920 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777	921 (_, [], [], [], [], []) =>
adamc@777	922 app (fn (_, r) => r := SOME empty) unifs1
adamc@777	923 \| ([], [], [], _, [], []) =>
adamc@777	924 app (fn (_, r) => r := SOME empty) unifs2
adam@1341	925 \| (_, _, _, [], [], [cr as (L'.CUnif (nl, _, _, _, r), _)]) =>
adam@1341	926 let
adam@1341	927 val c = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1341	928 in
adam@1341	929 if occursCon r c then
adam@1341	930 raise CUnify' (COccursCheckFailed (cr, c))
adam@1341	931 else
adam@1341	932 (r := SOME (squish nl c))
adam@1341	933 handle CantSquish => default ()
adam@1341	934 end
adam@1341	935 \| ([], [], [cr as (L'.CUnif (nl, _, _, _, r), _)], _, _, _) =>
adam@1341	936 let
adam@1341	937 val c = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1341	938 in
adam@1341	939 if occursCon r c then
adam@1341	940 raise CUnify' (COccursCheckFailed (cr, c))
adam@1341	941 else
adam@1341	942 (r := SOME (squish nl c))
adam@1341	943 handle CantSquish => default ()
adam@1341	944 end
adam@1341	945 \| _ => default ())
adam@1341	946
adamc@777	947 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777	948 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403	949 end
adamc@403	950
adamc@987	951 and guessMap env loc (c1, c2, ex) =
adamc@403	952 let
adamc@621	953 fun unfold (dom, ran, f, r, c) =
adamc@403	954 let
adamc@621	955 fun unfold (r, c) =
adamc@754	956 case #1 (hnormCon env c) of
adamc@987	957 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628	958 \| L'.CRecord (_, [(x, v)]) =>
adamc@628	959 let
adamc@628	960 val v' = case dom of
adamc@628	961 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628	962 \| _ => cunif (loc, dom)
adamc@628	963 in
adamc@987	964 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987	965 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628	966 end
adamc@628	967 \| L'.CRecord (_, (x, v) :: rest) =>
adamc@628	968 let
adamc@628	969 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628	970 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628	971 in
adamc@628	972 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628	973 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987	974 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	975 end
adamc@628	976 \| L'.CConcat (c1', c2') =>
adamc@628	977 let
adamc@628	978 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628	979 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628	980 in
adamc@628	981 unfold (r1, c1');
adamc@628	982 unfold (r2, c2');
adamc@987	983 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	984 end
adam@1303	985 \| L'.CUnif (0, _, _, _, ur) =>
adamc@777	986 ur := SOME (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adamc@628	987 \| _ => raise ex
adamc@403	988 in
adamc@621	989 unfold (r, c)
adamc@403	990 end
adamc@632	991 handle _ => raise ex
adamc@403	992 in
adamc@403	993 case (#1 c1, #1 c2) of
adamc@621	994 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621	995 unfold (dom, ran, f, r, c2)
adamc@621	996 \| (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621	997 unfold (dom, ran, f, r, c1)
adamc@403	998 \| _ => raise ex
adamc@403	999 end
adamc@403	1000
adamc@987	1001 and unifyCons' env loc c1 c2 =
adamc@628	1002 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628	1003 ()
adamc@628	1004 else
adamc@403	1005 let
adamc@628	1006 (*val befor = Time.now ()
adamc@628	1007 val old1 = c1
adamc@628	1008 val old2 = c2*)
adamc@628	1009 val c1 = hnormCon env c1
adamc@628	1010 val c2 = hnormCon env c2
adamc@403	1011 in
adamc@987	1012 unifyCons'' env loc c1 c2
adamc@987	1013 handle ex => guessMap env loc (c1, c2, ex)
adamc@403	1014 end
adamc@628	1015
adamc@987	1016 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403	1017 let
adamc@403	1018 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403	1019
adamc@706	1020 fun projSpecial1 (c1, n1, onFail) =
adamc@403	1021 let
adamc@632	1022 fun trySnd () =
adamc@632	1023 case #1 (hnormCon env c2All) of
adamc@632	1024 L'.CProj (c2, n2) =>
adamc@632	1025 let
adamc@632	1026 fun tryNormal () =
adamc@632	1027 if n1 = n2 then
adamc@987	1028 unifyCons' env loc c1 c2
adamc@632	1029 else
adamc@706	1030 onFail ()
adamc@632	1031 in
adamc@632	1032 case #1 (hnormCon env c2) of
adam@1303	1033 L'.CUnif (0, _, k, _, r) =>
adamc@632	1034 (case #1 (hnormKind k) of
adamc@632	1035 L'.KTuple ks =>
adamc@632	1036 let
adamc@632	1037 val loc = #2 c2
adamc@632	1038 val us = map (fn k => cunif (loc, k)) ks
adamc@632	1039 in
adamc@632	1040 r := SOME (L'.CTuple us, loc);
adamc@987	1041 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632	1042 end
adamc@632	1043 \| _ => tryNormal ())
adamc@632	1044 \| _ => tryNormal ()
adamc@632	1045 end
adamc@706	1046 \| _ => onFail ()
adamc@403	1047 in
adamc@632	1048 case #1 (hnormCon env c1) of
adam@1303	1049 L'.CUnif (0, _, k, _, r) =>
adamc@632	1050 (case #1 (hnormKind k) of
adamc@632	1051 L'.KTuple ks =>
adamc@632	1052 let
adamc@632	1053 val loc = #2 c1
adamc@632	1054 val us = map (fn k => cunif (loc, k)) ks
adamc@632	1055 in
adamc@632	1056 r := SOME (L'.CTuple us, loc);
adamc@987	1057 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632	1058 end
adamc@632	1059 \| _ => trySnd ())
adamc@632	1060 \| _ => trySnd ()
adamc@403	1061 end
adamc@632	1062
adamc@706	1063 fun projSpecial2 (c2, n2, onFail) =
adamc@706	1064 case #1 (hnormCon env c2) of
adam@1303	1065 L'.CUnif (0, _, k, _, r) =>
adamc@706	1066 (case #1 (hnormKind k) of
adamc@706	1067 L'.KTuple ks =>
adamc@706	1068 let
adamc@706	1069 val loc = #2 c2
adamc@706	1070 val us = map (fn k => cunif (loc, k)) ks
adamc@706	1071 in
adamc@706	1072 r := SOME (L'.CTuple us, loc);
adamc@987	1073 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706	1074 end
adamc@706	1075 \| _ => onFail ())
adamc@706	1076 \| _ => onFail ()
adamc@706	1077
adamc@777	1078 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706	1079
adamc@706	1080 fun isRecord () =
adamc@706	1081 case (c1, c2) of
adamc@706	1082 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706	1083 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706	1084 \| _ => isRecord' ()
adamc@706	1085 in
adamc@706	1086 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@706	1087 ("c2All", p_con env c2All)];*)
adamc@706	1088
adamc@706	1089 case (c1, c2) of
adamc@706	1090 (L'.CError, _) => ()
adamc@706	1091 \| (_, L'.CError) => ()
adamc@403	1092
adam@1303	1093 \| (L'.CUnif (nl1, loc1, k1, _, r1), L'.CUnif (nl2, loc2, k2, _, r2)) =>
adam@1303	1094 if r1 = r2 andalso nl1 = nl2 then
adamc@705	1095 ()
adam@1303	1096 else if nl1 = 0 then
adamc@705	1097 (unifyKinds env k1 k2;
adamc@705	1098 r1 := SOME c2All)
adam@1303	1099 else if nl2 = 0 then
adam@1303	1100 (unifyKinds env k1 k2;
adam@1305	1101 r2 := SOME c1All)
adam@1303	1102 else
adam@1303	1103 err (fn _ => TooLifty (loc1, loc2))
adam@1303	1104
adam@1303	1105 \| (L'.CUnif (0, _, _, _, r), _) =>
adamc@705	1106 if occursCon r c2All then
adamc@705	1107 err COccursCheckFailed
adamc@705	1108 else
adamc@705	1109 r := SOME c2All
adam@1303	1110 \| (_, L'.CUnif (0, _, _, _, r)) =>
adamc@705	1111 if occursCon r c1All then
adamc@705	1112 err COccursCheckFailed
adamc@705	1113 else
adamc@705	1114 r := SOME c1All
adamc@705	1115
adam@1304	1116 \| (L'.CUnif (nl, _, _, _, r), _) =>
adam@1304	1117 if occursCon r c2All then
adam@1304	1118 err COccursCheckFailed
adam@1304	1119 else
adam@1304	1120 (r := SOME (squish nl c2All)
adam@1306	1121 handle CantSquish => err (fn _ => TooDeep))
adam@1304	1122 \| (_, L'.CUnif (nl, _, _, _, r)) =>
adam@1304	1123 if occursCon r c1All then
adam@1304	1124 err COccursCheckFailed
adam@1304	1125 else
adam@1304	1126 (r := SOME (squish nl c1All)
adam@1306	1127 handle CantSquish => err (fn _ => TooDeep))
adam@1304	1128
adam@1341	1129 \| (L'.CRecord _, _) => isRecord ()
adam@1341	1130 \| (_, L'.CRecord _) => isRecord ()
adam@1341	1131 \| (L'.CConcat _, _) => isRecord ()
adam@1341	1132 \| (_, L'.CConcat _) => isRecord ()
adam@1341	1133
adam@1341	1134
adamc@705	1135 \| (L'.CUnit, L'.CUnit) => ()
adamc@705	1136
adamc@705	1137 \| (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987	1138 (unifyCons' env loc d1 d2;
adamc@987	1139 unifyCons' env loc r1 r2)
adamc@705	1140 \| (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705	1141 if expl1 <> expl2 then
adamc@705	1142 err CExplicitness
adamc@705	1143 else
adamc@705	1144 (unifyKinds env d1 d2;
adamc@705	1145 let
adamc@705	1146 (val befor = Time.now ())
adamc@705	1147 val env' = E.pushCRel env x1 d1
adamc@705	1148 in
adamc@705	1149 (*TextIO.print ("E.pushCRel: "
adamc@705	1150 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705	1151 ^ "\n");*)
adamc@987	1152 unifyCons' env' loc r1 r2
adamc@705	1153 end)
adamc@987	1154 \| (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705	1155 \| (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987	1156 (unifyCons' env loc c1 c2;
adamc@987	1157 unifyCons' env loc d1 d2;
adamc@987	1158 unifyCons' env loc e1 e2)
adamc@705	1159
adamc@705	1160 \| (L'.CRel n1, L'.CRel n2) =>
adamc@705	1161 if n1 = n2 then
adamc@705	1162 ()
adamc@705	1163 else
adamc@705	1164 err CIncompatible
adamc@705	1165 \| (L'.CNamed n1, L'.CNamed n2) =>
adamc@705	1166 if n1 = n2 then
adamc@705	1167 ()
adamc@705	1168 else
adamc@705	1169 err CIncompatible
adamc@705	1170
adamc@705	1171 \| (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987	1172 (unifyCons' env loc d1 d2;
adamc@987	1173 unifyCons' env loc r1 r2)
adamc@705	1174 \| (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705	1175 (unifyKinds env k1 k2;
adamc@987	1176 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705	1177
adamc@705	1178 \| (L'.CName n1, L'.CName n2) =>
adamc@705	1179 if n1 = n2 then
adamc@705	1180 ()
adamc@705	1181 else
adamc@705	1182 err CIncompatible
adamc@705	1183
adamc@705	1184 \| (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705	1185 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705	1186 ()
adamc@705	1187 else
adamc@705	1188 err CIncompatible
adamc@705	1189
adamc@705	1190 \| (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987	1191 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705	1192 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705	1193
adamc@706	1194 \| (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706	1195 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706	1196
adamc@623	1197 \| (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623	1198 (unifyKinds env dom1 dom2;
adamc@628	1199 unifyKinds env ran1 ran2)
adamc@623	1200
adamc@623	1201 \| (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987	1202 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623	1203 \| (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623	1204 (unifyKinds env k1 k2;
adamc@987	1205 unifyCons' env loc c1 c2)
adamc@623	1206 \| (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987	1207 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628	1208
adamc@403	1209 \| _ => err CIncompatible
adamc@403	1210 end
adamc@403	1211
adamc@987	1212 and unifyCons env loc c1 c2 =
adamc@987	1213 unifyCons' env loc c1 c2
adamc@403	1214 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403	1215 \| KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403	1216
adamc@628	1217 fun checkCon env e c1 c2 =
adamc@987	1218 unifyCons env (#2 e) c1 c2
adamc@403	1219 handle CUnify (c1, c2, err) =>
adamc@628	1220 expError env (Unify (e, c1, c2, err))
adamc@628	1221
adamc@628	1222 fun checkPatCon env p c1 c2 =
adamc@987	1223 unifyCons env (#2 p) c1 c2
adamc@403	1224 handle CUnify (c1, c2, err) =>
adamc@628	1225 expError env (PatUnify (p, c1, c2, err))
adamc@71	1226
adamc@403	1227 fun primType env p =
adamc@403	1228 case p of
adamc@403	1229 P.Int _ => !int
adamc@403	1230 \| P.Float _ => !float
adamc@403	1231 \| P.String _ => !string
adamc@821	1232 \| P.Char _ => !char
adamc@623	1233
adamc@403	1234 datatype constraint =
adamc@403	1235 Disjoint of D.goal
adamc@403	1236 \| TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403	1237
adamc@403	1238 val enD = map Disjoint
adamc@403	1239
adamc@634	1240 fun isClassOrFolder env cl =
adamc@634	1241 E.isClass env cl
adamc@634	1242 orelse case hnormCon env cl of
adamc@634	1243 (L'.CKApp (cl, _), _) =>
adamc@634	1244 (case hnormCon env cl of
adamc@634	1245 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634	1246 \| _ => false)
adamc@634	1247 \| _ => false
adamc@634	1248
adam@1303	1249 fun subConInCon env x y =
adam@1303	1250 ElabOps.subConInCon x y
adam@1303	1251 handle SubUnif => (cunifyError env (TooUnify (#2 x, y));
adam@1303	1252 cerror)
adam@1303	1253
adamc@629	1254 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403	1255 let
adamc@898	1256 fun unravelKind (t, e) =
adamc@898	1257 case hnormCon env t of
adamc@898	1258 (L'.TKFun (x, t'), _) =>
adamc@898	1259 let
adamc@898	1260 val u = kunif loc
adamc@898	1261
adamc@898	1262 val t'' = subKindInCon (0, u) t'
adamc@898	1263 in
adamc@898	1264 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898	1265 end
adamc@898	1266 \| t => (e, t, [])
adamc@898	1267
adamc@403	1268 fun unravel (t, e) =
adamc@628	1269 case hnormCon env t of
adamc@628	1270 (L'.TKFun (x, t'), _) =>
adamc@628	1271 let
adamc@628	1272 val u = kunif loc
adamc@628	1273
adamc@628	1274 val t'' = subKindInCon (0, u) t'
adamc@628	1275 in
adamc@628	1276 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628	1277 end
adamc@628	1278 \| (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628	1279 let
adamc@628	1280 val u = cunif (loc, k)
adamc@628	1281
adam@1303	1282 val t'' = subConInCon env (0, u) t'
adamc@628	1283 in
adamc@628	1284 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628	1285 end
adamc@633	1286 \| (L'.TFun (dom, ran), _) =>
adamc@628	1287 let
adamc@633	1288 fun default () = (e, t, [])
adamc@750	1289
adamc@750	1290 fun isInstance () =
adamc@750	1291 if infer <> L.TypesOnly then
adamc@750	1292 let
adamc@750	1293 val r = ref NONE
adamc@750	1294 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750	1295 in
adamc@750	1296 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750	1297 end
adamc@750	1298 else
adamc@750	1299 default ()
adamc@750	1300
adamc@750	1301 fun hasInstance c =
adamc@753	1302 case hnormCon env c of
adamc@753	1303 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753	1304 con = fn c =>
adamc@753	1305 E.isClass env (hnormCon env (c, loc))} c
adamc@753	1306 \| c =>
adamc@750	1307 let
adamc@753	1308 fun findHead c =
adamc@753	1309 case #1 c of
adamc@753	1310 L'.CApp (f, _) => findHead f
adamc@753	1311 \| _ => c
adamc@753	1312
adamc@753	1313 val cl = hnormCon env (findHead c)
adamc@750	1314 in
adamc@750	1315 isClassOrFolder env cl
adamc@750	1316 end
adamc@628	1317 in
adamc@750	1318 if hasInstance dom then
adamc@750	1319 isInstance ()
adamc@750	1320 else
adamc@750	1321 default ()
adamc@628	1322 end
adamc@629	1323 \| (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629	1324 if infer <> L.TypesOnly then
adamc@629	1325 let
adamc@792	1326 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629	1327 val (e, t, gs') = unravel (t', e)
adamc@629	1328 in
adamc@629	1329 (e, t, enD gs @ gs')
adamc@629	1330 end
adamc@629	1331 else
adamc@629	1332 (e, t, [])
adamc@628	1333 \| t => (e, t, [])
adamc@704	1334 in
adamc@704	1335 case infer of
adamc@898	1336 L.DontInfer => unravelKind (t, e)
adamc@704	1337 \| _ => unravel (t, e)
adamc@704	1338 end
adamc@15	1339
adamc@628	1340 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171	1341 let
adamc@171	1342 val perror = (L'.PWild, loc)
adamc@171	1343 val terror = (L'.CError, loc)
adamc@171	1344 val pterror = (perror, terror)
adamc@171	1345 val rerror = (pterror, (env, bound))
adamc@171	1346
adamc@191	1347 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188	1348 case (po, to) of
adamc@188	1349 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188	1350 rerror)
adamc@188	1351 \| (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188	1352 rerror)
adamc@191	1353 \| (NONE, NONE) =>
adamc@191	1354 let
adamc@191	1355 val k = (L'.KType, loc)
adamc@191	1356 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191	1357 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191	1358 in
adamc@191	1359 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191	1360 (env, bound))
adamc@191	1361 end
adamc@188	1362 \| (SOME p, SOME t) =>
adamc@188	1363 let
adamc@628	1364 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191	1365
adamc@191	1366 val k = (L'.KType, loc)
adamc@191	1367 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194	1368 val nxs = length unifs - 1
adam@1304	1369 val t = ListUtil.foldli (fn (i, u, t) => subConInCon env (nxs - i,
adam@1304	1370 E.mliftConInCon (nxs - i) u) t) t unifs
adamc@191	1371 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188	1372 in
adamc@628	1373 ignore (checkPatCon env p' pt t);
adamc@191	1374 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188	1375 (env, bound))
adamc@188	1376 end
adamc@171	1377 in
adamc@171	1378 case p of
adamc@171	1379 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171	1380 (env, bound))
adamc@171	1381 \| L.PVar x =>
adamc@171	1382 let
adamc@171	1383 val t = if SS.member (bound, x) then
adamc@171	1384 (expError env (DuplicatePatternVariable (loc, x));
adamc@171	1385 terror)
adamc@171	1386 else
adamc@171	1387 cunif (loc, (L'.KType, loc))
adamc@171	1388 in
adamc@182	1389 (((L'.PVar (x, t), loc), t),
adamc@171	1390 (E.pushERel env x t, SS.add (bound, x)))
adamc@171	1391 end
adamc@173	1392 \| L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173	1393 (env, bound))
adamc@171	1394 \| L.PCon ([], x, po) =>
adamc@171	1395 (case E.lookupConstructor env x of
adamc@174	1396 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171	1397 rerror)
adamc@191	1398 \| SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174	1399 \| L.PCon (m1 :: ms, x, po) =>
adamc@174	1400 (case E.lookupStr env m1 of
adamc@174	1401 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174	1402 rerror)
adamc@174	1403 \| SOME (n, sgn) =>
adamc@174	1404 let
adamc@174	1405 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174	1406 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182	1407 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174	1408 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174	1409 ((L'.StrVar n, loc), sgn) ms
adamc@174	1410 in
adamc@174	1411 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174	1412 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174	1413 rerror)
adamc@191	1414 \| SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174	1415 end)
adamc@174	1416
adamc@175	1417 \| L.PRecord (xps, flex) =>
adamc@175	1418 let
adamc@175	1419 val (xpts, (env, bound, _)) =
adamc@175	1420 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175	1421 let
adamc@628	1422 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175	1423 in
adamc@175	1424 if SS.member (fbound, x) then
adamc@175	1425 expError env (DuplicatePatField (loc, x))
adamc@175	1426 else
adamc@175	1427 ();
adamc@175	1428 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175	1429 end)
adamc@175	1430 (env, bound, SS.empty) xps
adamc@175	1431
adamc@175	1432 val k = (L'.KType, loc)
adamc@175	1433 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176	1434 val c =
adamc@175	1435 if flex then
adamc@176	1436 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175	1437 else
adamc@176	1438 c
adamc@175	1439 in
adamc@182	1440 (((L'.PRecord xpts, loc),
adamc@175	1441 (L'.TRecord c, loc)),
adamc@175	1442 (env, bound))
adamc@175	1443 end
adamc@822	1444
adamc@822	1445 \| L.PAnnot (p, t) =>
adamc@822	1446 let
adamc@822	1447 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822	1448 val (t', k, _) = elabCon (env, D.empty) t
adamc@822	1449 in
adamc@822	1450 checkPatCon env p' pt t';
adamc@822	1451 ((p', t'), (env, bound))
adamc@822	1452 end
adamc@171	1453 end
adamc@171	1454
adamc@819	1455 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819	1456 fun exhaustive (env, t, ps, loc) =
adamc@819	1457 let
adamc@819	1458 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819	1459
adamc@819	1460 fun patConNum pc =
adamc@819	1461 case pc of
adamc@819	1462 L'.PConVar n => n
adamc@819	1463 \| L'.PConProj (m1, ms, x) =>
adamc@819	1464 let
adamc@819	1465 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1466 in
adamc@819	1467 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819	1468 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1469 \| SOME (_, n, _, _, _) => n
adamc@819	1470 end
adamc@819	1471
adamc@819	1472 fun nameOfNum (t, n) =
adamc@819	1473 case t of
adamc@819	1474 L'.CModProj (m1, ms, x) =>
adamc@819	1475 let
adamc@819	1476 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1477 in
adamc@819	1478 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1479 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1480 \| SOME (_, cons) =>
adamc@819	1481 case ListUtil.search (fn (name, n', _) =>
adamc@819	1482 if n' = n then
adamc@819	1483 SOME name
adamc@819	1484 else
adamc@819	1485 NONE) cons of
adamc@819	1486 NONE => fail 9
adamc@819	1487 \| SOME name => L'.PConProj (m1, ms, name)
adamc@819	1488 end
adamc@819	1489 \| _ => L'.PConVar n
adamc@819	1490
adamc@819	1491 fun S (args, c, P) =
adamc@819	1492 List.mapPartial
adamc@819	1493 (fn [] => fail 1
adamc@819	1494 \| p1 :: ps =>
adamc@819	1495 let
adamc@819	1496 val loc = #2 p1
adamc@819	1497
adamc@819	1498 fun wild () =
adamc@819	1499 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819	1500 in
adamc@819	1501 case #1 p1 of
adamc@819	1502 L'.PPrim _ => NONE
adamc@819	1503 \| L'.PCon (_, c', _, NONE) =>
adamc@819	1504 if patConNum c' = c then
adamc@819	1505 SOME ps
adamc@819	1506 else
adamc@819	1507 NONE
adamc@819	1508 \| L'.PCon (_, c', _, SOME p) =>
adamc@819	1509 if patConNum c' = c then
adamc@819	1510 SOME (p :: ps)
adamc@819	1511 else
adamc@819	1512 NONE
adamc@819	1513 \| L'.PRecord xpts =>
adamc@819	1514 SOME (map (fn x =>
adamc@819	1515 case ListUtil.search (fn (x', p, _) =>
adamc@819	1516 if x = x' then
adamc@819	1517 SOME p
adamc@819	1518 else
adamc@819	1519 NONE) xpts of
adamc@819	1520 NONE => (L'.PWild, loc)
adamc@819	1521 \| SOME p => p) args @ ps)
adamc@819	1522 \| L'.PWild => wild ()
adamc@819	1523 \| L'.PVar _ => wild ()
adamc@819	1524 end)
adamc@819	1525 P
adamc@819	1526
adamc@819	1527 fun D P =
adamc@819	1528 List.mapPartial
adamc@819	1529 (fn [] => fail 2
adamc@819	1530 \| (p1, _) :: ps =>
adamc@819	1531 case p1 of
adamc@819	1532 L'.PWild => SOME ps
adamc@819	1533 \| L'.PVar _ => SOME ps
adamc@819	1534 \| L'.PPrim _ => NONE
adamc@819	1535 \| L'.PCon _ => NONE
adamc@819	1536 \| L'.PRecord _ => NONE)
adamc@819	1537 P
adamc@819	1538
adamc@819	1539 fun I (P, q) =
adamc@819	1540 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819	1541 ("q", p_list (p_con env) q)];*)
adamc@819	1542 case q of
adamc@819	1543 [] => (case P of
adamc@819	1544 [] => SOME []
adamc@819	1545 \| _ => NONE)
adamc@819	1546 \| q1 :: qs =>
adamc@819	1547 let
adamc@819	1548 val loc = #2 q1
adamc@819	1549
adamc@819	1550 fun unapp (t, acc) =
adamc@830	1551 case #1 t of
adamc@830	1552 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819	1553 \| _ => (t, rev acc)
adamc@819	1554
adamc@830	1555 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830	1556 val t1 = hnormCon env t1
adam@1303	1557 fun doSub t = foldl (fn (arg, t) => subConInCon env (0, arg) t) t args
adamc@819	1558
adamc@819	1559 fun dtype (dtO, names) =
adamc@819	1560 let
adamc@819	1561 val nameSet = IS.addList (IS.empty, names)
adamc@819	1562 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819	1563 case ps of
adamc@819	1564 [] => fail 4
adamc@819	1565 \| (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819	1566 (IS.delete (nameSet, patConNum pc)
adamc@819	1567 handle NotFound => nameSet)
adamc@819	1568 \| _ => nameSet)
adamc@819	1569 nameSet P
adamc@819	1570 in
adamc@819	1571 nameSet
adamc@819	1572 end
adamc@819	1573
adamc@819	1574 fun default () = (NONE, IS.singleton 0, [])
adamc@819	1575
adamc@819	1576 val (dtO, unused, cons) =
adamc@830	1577 case #1 t1 of
adamc@819	1578 L'.CNamed n =>
adamc@819	1579 let
adamc@819	1580 val dt = E.lookupDatatype env n
adamc@819	1581 val cons = E.constructors dt
adamc@819	1582 in
adamc@819	1583 (SOME dt,
adamc@819	1584 dtype (SOME dt, map #2 cons),
adamc@819	1585 map (fn (_, n, co) =>
adamc@819	1586 (n,
adamc@819	1587 case co of
adamc@819	1588 NONE => []
adamc@819	1589 \| SOME t => [("", doSub t)])) cons)
adamc@819	1590 end
adamc@819	1591 \| L'.CModProj (m1, ms, x) =>
adamc@819	1592 let
adamc@819	1593 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1594 in
adamc@819	1595 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1596 NONE => default ()
adamc@819	1597 \| SOME (_, cons) =>
adamc@819	1598 (NONE,
adamc@819	1599 dtype (NONE, map #2 cons),
adamc@819	1600 map (fn (s, _, co) =>
adamc@819	1601 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819	1602 case co of
adamc@819	1603 NONE => []
adamc@819	1604 \| SOME t => [("", doSub t)])) cons)
adamc@819	1605 end
adamc@830	1606 \| L'.TRecord t =>
adamc@830	1607 (case #1 (hnormCon env t) of
adamc@830	1608 L'.CRecord (_, xts) =>
adamc@830	1609 let
adamc@830	1610 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830	1611 \| _ => NONE) xts
adamc@830	1612 in
adamc@830	1613 if List.all Option.isSome xts then
adamc@830	1614 let
adamc@830	1615 val xts = List.mapPartial (fn x => x) xts
adamc@830	1616 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830	1617 String.compare (x1, x2) = GREATER) xts
adamc@830	1618 in
adamc@830	1619 (NONE, IS.empty, [(0, xts)])
adamc@830	1620 end
adamc@830	1621 else
adamc@830	1622 default ()
adamc@830	1623 end
adamc@830	1624 \| _ => default ())
adamc@819	1625 \| _ => default ()
adamc@819	1626 in
adamc@819	1627 if IS.isEmpty unused then
adamc@819	1628 let
adamc@819	1629 fun recurse cons =
adamc@819	1630 case cons of
adamc@819	1631 [] => NONE
adamc@819	1632 \| (name, args) :: cons =>
adamc@819	1633 case I (S (map #1 args, name, P),
adamc@819	1634 map #2 args @ qs) of
adamc@819	1635 NONE => recurse cons
adamc@819	1636 \| SOME ps =>
adamc@819	1637 let
adamc@819	1638 val nargs = length args
adamc@819	1639 val argPs = List.take (ps, nargs)
adamc@819	1640 val restPs = List.drop (ps, nargs)
adamc@819	1641
adamc@819	1642 val p = case name of
adamc@819	1643 0 => L'.PRecord (ListPair.map
adamc@819	1644 (fn ((name, t), p) => (name, p, t))
adamc@819	1645 (args, argPs))
adamc@830	1646 \| _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819	1647 case argPs of
adamc@819	1648 [] => NONE
adamc@819	1649 \| [p] => SOME p
adamc@819	1650 \| _ => fail 3)
adamc@819	1651 in
adamc@819	1652 SOME ((p, loc) :: restPs)
adamc@819	1653 end
adamc@819	1654 in
adamc@819	1655 recurse cons
adamc@819	1656 end
adamc@819	1657 else
adamc@819	1658 case I (D P, qs) of
adamc@819	1659 NONE => NONE
adamc@819	1660 \| SOME ps =>
adamc@819	1661 let
adamc@819	1662 val p = case cons of
adamc@819	1663 [] => L'.PWild
adamc@819	1664 \| (0, _) :: _ => L'.PWild
adamc@819	1665 \| _ =>
adamc@819	1666 case IS.find (fn _ => true) unused of
adamc@819	1667 NONE => fail 6
adamc@819	1668 \| SOME name =>
adamc@819	1669 case ListUtil.search (fn (name', args) =>
adamc@819	1670 if name = name' then
adamc@819	1671 SOME (name', args)
adamc@819	1672 else
adamc@819	1673 NONE) cons of
adamc@819	1674 SOME (n, []) =>
adamc@830	1675 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819	1676 \| SOME (n, [_]) =>
adamc@830	1677 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819	1678 \| _ => fail 7
adamc@819	1679 in
adamc@819	1680 SOME ((p, loc) :: ps)
adamc@819	1681 end
adamc@819	1682 end
adamc@819	1683 in
adamc@819	1684 case I (map (fn x => [x]) ps, [t]) of
adamc@819	1685 NONE => NONE
adamc@819	1686 \| SOME [p] => SOME p
adamc@819	1687 \| _ => fail 7
adamc@819	1688 end
adamc@819	1689
adamc@217	1690 fun unmodCon env (c, loc) =
adamc@217	1691 case c of
adamc@217	1692 L'.CNamed n =>
adamc@217	1693 (case E.lookupCNamed env n of
adamc@217	1694 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1695 \| _ => (c, loc))
adamc@217	1696 \| L'.CModProj (m1, ms, x) =>
adamc@217	1697 let
adamc@217	1698 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217	1699 in
adamc@217	1700 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217	1701 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217	1702 \| SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1703 \| _ => (c, loc)
adamc@217	1704 end
adamc@217	1705 \| _ => (c, loc)
adamc@217	1706
adamc@721	1707 fun normClassKey env c =
adamc@467	1708 let
adamc@721	1709 val c = hnormCon env c
adamc@467	1710 in
adamc@467	1711 case #1 c of
adamc@467	1712 L'.CApp (c1, c2) =>
adamc@467	1713 let
adamc@721	1714 val c1 = normClassKey env c1
adamc@721	1715 val c2 = normClassKey env c2
adamc@467	1716 in
adamc@467	1717 (L'.CApp (c1, c2), #2 c)
adamc@467	1718 end
adamc@721	1719 \| L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721	1720 normClassKey env c)) xcs), #2 c)
adamc@721	1721 \| _ => unmodCon env c
adamc@467	1722 end
adamc@467	1723
adamc@467	1724 fun normClassConstraint env (c, loc) =
adamc@217	1725 case c of
adamc@217	1726 L'.CApp (f, x) =>
adamc@217	1727 let
adamc@721	1728 val f = normClassKey env f
adamc@467	1729 val x = normClassKey env x
adamc@217	1730 in
adamc@467	1731 (L'.CApp (f, x), loc)
adamc@217	1732 end
adamc@674	1733 \| L'.TFun (c1, c2) =>
adamc@674	1734 let
adamc@674	1735 val c1 = normClassConstraint env c1
adamc@674	1736 val c2 = normClassConstraint env c2
adamc@674	1737 in
adamc@674	1738 (L'.TFun (c1, c2), loc)
adamc@674	1739 end
adamc@674	1740 \| L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adam@1303	1741 \| L'.CUnif (nl, _, _, _, ref (SOME c)) => normClassConstraint env (E.mliftConInCon nl c)
adamc@721	1742 \| _ => unmodCon env (c, loc)
adamc@216	1743
adamc@1093	1744 fun findHead e e' =
adamc@1093	1745 let
adamc@1093	1746 fun findHead (e, _) =
adamc@1093	1747 case e of
adamc@1093	1748 L.EVar (_, _, infer) =>
adamc@1093	1749 let
adamc@1093	1750 fun findHead' (e, _) =
adamc@1093	1751 case e of
adamc@1093	1752 L'.ENamed _ => true
adamc@1093	1753 \| L'.EModProj _ => true
adam@1472	1754 \| L'.ERel _ => true
adamc@1093	1755 \| L'.EApp (e, _) => findHead' e
adamc@1093	1756 \| L'.ECApp (e, _) => findHead' e
adamc@1093	1757 \| L'.EKApp (e, _) => findHead' e
adamc@1093	1758 \| _ => false
adamc@1093	1759 in
adamc@1093	1760 if findHead' e' then
adamc@1093	1761 SOME infer
adamc@1093	1762 else
adamc@1093	1763 NONE
adamc@1093	1764 end
adamc@1093	1765 \| L.EApp (e, _) => findHead e
adamc@1093	1766 \| L.ECApp (e, _) => findHead e
adamc@1093	1767 \| L.EDisjointApp e => findHead e
adamc@1093	1768 \| _ => NONE
adamc@1093	1769 in
adamc@1093	1770 findHead e
adamc@1093	1771 end
adamc@1093	1772
adamc@1275	1773 datatype needed = Needed of {Cons : (L'.kind * L'.con option) SM.map,
adamc@1264	1774 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264	1775 Vals : SS.set,
adamc@1270	1776 Mods : (E.env * needed) SM.map}
adamc@1264	1777
adamc@1264	1778 fun ncons (Needed r) = #Cons r
adamc@1264	1779 fun nconstraints (Needed r) = #Constraints r
adamc@1264	1780 fun nvals (Needed r) = #Vals r
adamc@1264	1781 fun nmods (Needed r) = #Mods r
adamc@1264	1782
adamc@1264	1783 val nempty = Needed {Cons = SM.empty,
adamc@1264	1784 Constraints = nil,
adamc@1264	1785 Vals = SS.empty,
adamc@1264	1786 Mods = SM.empty}
adamc@1264	1787
adamc@1264	1788 fun naddCon (r : needed, k, v) =
adamc@1264	1789 let
adamc@1264	1790 val Needed r = r
adamc@1264	1791 in
adamc@1264	1792 Needed {Cons = SM.insert (#Cons r, k, v),
adamc@1264	1793 Constraints = #Constraints r,
adamc@1264	1794 Vals = #Vals r,
adamc@1264	1795 Mods = #Mods r}
adamc@1264	1796 end
adamc@1264	1797
adamc@1264	1798 fun naddConstraint (r : needed, v) =
adamc@1264	1799 let
adamc@1264	1800 val Needed r = r
adamc@1264	1801 in
adamc@1264	1802 Needed {Cons = #Cons r,
adamc@1264	1803 Constraints = v :: #Constraints r,
adamc@1264	1804 Vals = #Vals r,
adamc@1264	1805 Mods = #Mods r}
adamc@1264	1806 end
adamc@1264	1807
adamc@1264	1808 fun naddVal (r : needed, k) =
adamc@1264	1809 let
adamc@1264	1810 val Needed r = r
adamc@1264	1811 in
adamc@1264	1812 Needed {Cons = #Cons r,
adamc@1264	1813 Constraints = #Constraints r,
adamc@1264	1814 Vals = SS.add (#Vals r, k),
adamc@1264	1815 Mods = #Mods r}
adamc@1264	1816 end
adamc@1264	1817
adamc@1264	1818 fun naddMod (r : needed, k, v) =
adamc@1264	1819 let
adamc@1264	1820 val Needed r = r
adamc@1264	1821 in
adamc@1264	1822 Needed {Cons = #Cons r,
adamc@1264	1823 Constraints = #Constraints r,
adamc@1264	1824 Vals = #Vals r,
adamc@1264	1825 Mods = SM.insert (#Mods r, k, v)}
adamc@1264	1826 end
adamc@1264	1827
adamc@1264	1828 fun ndelCon (r : needed, k) =
adamc@1264	1829 let
adamc@1264	1830 val Needed r = r
adamc@1264	1831 in
adamc@1264	1832 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adamc@1264	1833 Constraints = #Constraints r,
adamc@1264	1834 Vals = #Vals r,
adamc@1264	1835 Mods = #Mods r}
adamc@1264	1836 end
adamc@1264	1837
adamc@1264	1838 fun ndelVal (r : needed, k) =
adamc@1264	1839 let
adamc@1264	1840 val Needed r = r
adamc@1264	1841 in
adamc@1264	1842 Needed {Cons = #Cons r,
adamc@1264	1843 Constraints = #Constraints r,
adamc@1264	1844 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264	1845 Mods = #Mods r}
adamc@1264	1846 end
adamc@1264	1847
adamc@92	1848 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91	1849 let
adamc@848	1850 (val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)])
adamc@514	1851 (val befor = Time.now ())
adamc@280	1852
adamc@280	1853 val r = case e of
adamc@91	1854 L.EAnnot (e, t) =>
adamc@91	1855 let
adamc@91	1856 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	1857 val (t', _, gs2) = elabCon (env, denv) t
adamc@91	1858 in
adamc@628	1859 checkCon env e' et t';
adamc@628	1860 (e', t', gs1 @ enD gs2)
adamc@91	1861 end
adamc@34	1862
adamc@91	1863 \| L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403	1864 \| L.EVar ([], s, infer) =>
adamc@91	1865 (case E.lookupE env s of
adamc@91	1866 E.NotBound =>
adamc@91	1867 (expError env (UnboundExp (loc, s));
adamc@91	1868 (eerror, cerror, []))
adamc@629	1869 \| E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629	1870 \| E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403	1871 \| L.EVar (m1 :: ms, s, infer) =>
adamc@91	1872 (case E.lookupStr env m1 of
adamc@91	1873 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91	1874 (eerror, cerror, []))
adamc@91	1875 \| SOME (n, sgn) =>
adamc@91	1876 let
adamc@91	1877 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91	1878 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91	1879 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91	1880 (strerror, sgnerror))
adamc@91	1881 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91	1882 ((L'.StrVar n, loc), sgn) ms
adamc@10	1883
adamc@91	1884 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91	1885 NONE => (expError env (UnboundExp (loc, s));
adamc@91	1886 cerror)
adamc@91	1887 \| SOME t => t
adamc@91	1888 in
adamc@629	1889 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91	1890 end)
adamc@86	1891
adamc@349	1892 \| L.EWild =>
adamc@210	1893 let
adamc@349	1894 val r = ref NONE
adamc@349	1895 val c = cunif (loc, (L'.KType, loc))
adamc@210	1896 in
adamc@349	1897 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210	1898 end
adamc@210	1899
adamc@91	1900 \| L.EApp (e1, e2) =>
adamc@91	1901 let
adamc@91	1902 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093	1903
adamc@403	1904 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71	1905
adamc@91	1906 val dom = cunif (loc, ktype)
adamc@91	1907 val ran = cunif (loc, ktype)
adamc@838	1908 val t = (L'.TFun (dom, ran), loc)
adamc@1093	1909
adamc@1093	1910 val () = checkCon env e1' t1 t
adamc@1093	1911 val () = checkCon env e2' t2 dom
adamc@1093	1912
adamc@1093	1913 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093	1914 val (ef, et, gs3) =
adamc@1093	1915 case findHead e1 e1' of
adamc@1093	1916 NONE => (ef, ran, [])
adamc@1093	1917 \| SOME infer => elabHead (env, denv) infer ef ran
adamc@91	1918 in
adamc@1093	1919 (ef, et, gs1 @ gs2 @ gs3)
adamc@91	1920 end
adamc@91	1921 \| L.EAbs (x, to, e) =>
adamc@91	1922 let
adamc@91	1923 val (t', gs1) = case to of
adamc@91	1924 NONE => (cunif (loc, ktype), [])
adamc@91	1925 \| SOME t =>
adamc@91	1926 let
adamc@91	1927 val (t', tk, gs) = elabCon (env, denv) t
adamc@91	1928 in
adamc@91	1929 checkKind env t' tk ktype;
adamc@91	1930 (t', gs)
adamc@91	1931 end
adamc@467	1932 val dom = normClassConstraint env t'
adamc@467	1933 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91	1934 in
adamc@91	1935 ((L'.EAbs (x, t', et, e'), loc),
adamc@91	1936 (L'.TFun (t', et), loc),
adamc@467	1937 enD gs1 @ gs2)
adamc@91	1938 end
adamc@91	1939 \| L.ECApp (e, c) =>
adamc@91	1940 let
adamc@91	1941 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093	1942
adamc@328	1943 val oldEt = et
adamc@403	1944 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628	1945 val (et', _) = hnormCon env et
adamc@91	1946 in
adamc@91	1947 case et' of
adamc@91	1948 L'.CError => (eerror, cerror, [])
adamc@328	1949 \| L'.TCFun (_, x, k, eb) =>
adamc@91	1950 let
adamc@91	1951 val () = checkKind env c' ck k
adam@1303	1952 val eb' = subConInCon env (0, c') eb
adamc@1093	1953
adamc@1093	1954 val ef = (L'.ECApp (e', c'), loc)
adamc@1093	1955 val (ef, eb', gs3) =
adamc@1093	1956 case findHead e e' of
adamc@1093	1957 NONE => (ef, eb', [])
adamc@1093	1958 \| SOME infer => elabHead (env, denv) infer ef eb'
adamc@91	1959 in
adamc@328	1960 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328	1961 ("et", p_con env oldEt),
adamc@328	1962 ("x", PD.string x),
adamc@328	1963 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328	1964 ("c", p_con env c'),
adamc@328	1965 ("eb'", p_con env eb')];*)
adamc@1093	1966 (ef, eb', gs1 @ enD gs2 @ gs3)
adamc@91	1967 end
adamc@91	1968
adamc@91	1969 \| _ =>
adamc@91	1970 (expError env (WrongForm ("constructor function", e', et));
adamc@91	1971 (eerror, cerror, []))
adamc@91	1972 end
adamc@91	1973 \| L.ECAbs (expl, x, k, e) =>
adamc@91	1974 let
adamc@91	1975 val expl' = elabExplicitness expl
adamc@623	1976 val k' = elabKind env k
adamc@328	1977
adamc@328	1978 val env' = E.pushCRel env x k'
adamc@328	1979 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91	1980 in
adamc@91	1981 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91	1982 (L'.TCFun (expl', x, k', et), loc),
adamc@91	1983 gs)
adamc@91	1984 end
adamc@623	1985 \| L.EKAbs (x, e) =>
adamc@623	1986 let
adamc@623	1987 val env' = E.pushKRel env x
adamc@623	1988 val (e', et, gs) = elabExp (env', denv) e
adamc@623	1989 in
adamc@623	1990 ((L'.EKAbs (x, e'), loc),
adamc@623	1991 (L'.TKFun (x, et), loc),
adamc@623	1992 gs)
adamc@623	1993 end
adamc@91	1994
adamc@91	1995 \| L.EDisjoint (c1, c2, e) =>
adamc@91	1996 let
adamc@91	1997 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91	1998 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91	1999
adamc@91	2000 val ku1 = kunif loc
adamc@91	2001 val ku2 = kunif loc
adamc@91	2002
adamc@628	2003 val denv' = D.assert env denv (c1', c2')
adamc@628	2004 val (e', t, gs3) = elabExp (env, denv') e
adamc@91	2005 in
adamc@91	2006 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91	2007 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91	2008
adamc@628	2009 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91	2010 end
adamc@629	2011 \| L.EDisjointApp e =>
adamc@629	2012 let
adamc@629	2013 val (e', t, gs1) = elabExp (env, denv) e
adamc@629	2014
adamc@629	2015 val k1 = kunif loc
adamc@629	2016 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629	2017 val k2 = kunif loc
adamc@629	2018 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629	2019 val t' = cunif (loc, ktype)
adamc@629	2020 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629	2021 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629	2022 in
adamc@629	2023 (e', t', enD gs2 @ gs1)
adamc@629	2024 end
adamc@91	2025
adamc@91	2026 \| L.ERecord xes =>
adamc@91	2027 let
adamc@91	2028 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91	2029 let
adamc@91	2030 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91	2031 val (e', et, gs2) = elabExp (env, denv) e
adamc@91	2032 in
adamc@91	2033 checkKind env x' xk kname;
adamc@228	2034 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91	2035 end)
adamc@91	2036 [] xes
adamc@91	2037
adamc@91	2038 val k = (L'.KType, loc)
adamc@91	2039
adamc@91	2040 fun prove (xets, gs) =
adamc@91	2041 case xets of
adamc@91	2042 [] => gs
adamc@91	2043 \| (x, _, t) :: rest =>
adamc@91	2044 let
adamc@91	2045 val xc = (x, t)
adamc@91	2046 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91	2047 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91	2048 let
adamc@91	2049 val xc' = (x', t')
adamc@91	2050 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91	2051 in
adamc@91	2052 D.prove env denv (r1, r2, loc) @ gs
adamc@91	2053 end)
adamc@91	2054 gs rest
adamc@91	2055 in
adamc@91	2056 prove (rest, gs)
adamc@91	2057 end
adamc@228	2058
adamc@228	2059 val gsD = List.mapPartial (fn Disjoint d => SOME d \| _ => NONE) gs
adamc@228	2060 val gsO = List.filter (fn Disjoint _ => false \| _ => true) gs
adamc@91	2061 in
adamc@255	2062 (TextIO.print ("\|gsO\| = " ^ Int.toString (length gsO) ^ "\n");)
adamc@91	2063 ((L'.ERecord xes', loc),
adamc@91	2064 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228	2065 enD (prove (xes', gsD)) @ gsO)
adamc@91	2066 end
adamc@91	2067
adamc@91	2068 \| L.EField (e, c) =>
adamc@91	2069 let
adamc@91	2070 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	2071 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91	2072
adamc@91	2073 val ft = cunif (loc, ktype)
adamc@91	2074 val rest = cunif (loc, ktype_record)
adamc@91	2075 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2076 val () = checkCon env e' et
adamc@629	2077 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628	2078 val gs3 = D.prove env denv (first, rest, loc)
adamc@91	2079 in
adamc@628	2080 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91	2081 end
adamc@91	2082
adamc@445	2083 \| L.EConcat (e1, e2) =>
adamc@339	2084 let
adamc@339	2085 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445	2086 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445	2087
adamc@445	2088 val r1 = cunif (loc, ktype_record)
adamc@445	2089 val r2 = cunif (loc, ktype_record)
adamc@445	2090
adamc@629	2091 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629	2092 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629	2093
adamc@628	2094 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339	2095 in
adamc@445	2096 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445	2097 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628	2098 gs1 @ gs2 @ enD gs3)
adamc@339	2099 end
adamc@149	2100 \| L.ECut (e, c) =>
adamc@149	2101 let
adamc@149	2102 val (e', et, gs1) = elabExp (env, denv) e
adamc@149	2103 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149	2104
adamc@149	2105 val ft = cunif (loc, ktype)
adamc@149	2106 val rest = cunif (loc, ktype_record)
adamc@149	2107 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2108
adamc@629	2109 val () = checkCon env e' et
adamc@629	2110 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149	2111
adamc@628	2112 val gs3 = D.prove env denv (first, rest, loc)
adamc@149	2113 in
adam@1299	2114 checkKind env c' ck kname;
adamc@228	2115 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2116 gs1 @ enD gs2 @ enD gs3)
adamc@149	2117 end
adamc@493	2118 \| L.ECutMulti (e, c) =>
adamc@493	2119 let
adamc@493	2120 val (e', et, gs1) = elabExp (env, denv) e
adamc@493	2121 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493	2122
adamc@493	2123 val rest = cunif (loc, ktype_record)
adamc@629	2124
adamc@629	2125 val () = checkCon env e' et
adamc@629	2126 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493	2127
adamc@628	2128 val gs3 = D.prove env denv (c', rest, loc)
adamc@493	2129 in
adam@1299	2130 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493	2131 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2132 gs1 @ enD gs2 @ enD gs3)
adamc@493	2133 end
adamc@149	2134
adamc@171	2135 \| L.ECase (e, pes) =>
adamc@171	2136 let
adamc@171	2137 val (e', et, gs1) = elabExp (env, denv) e
adamc@171	2138 val result = cunif (loc, (L'.KType, loc))
adamc@171	2139 val (pes', gs) = ListUtil.foldlMap
adamc@171	2140 (fn ((p, e), gs) =>
adamc@171	2141 let
adamc@628	2142 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628	2143
adamc@629	2144 val (e', et', gs1) = elabExp (env, denv) e
adamc@171	2145 in
adamc@628	2146 checkPatCon env p' pt et;
adamc@629	2147 checkCon env e' et' result;
adamc@628	2148 ((p', e'), gs1 @ gs)
adamc@171	2149 end)
adamc@171	2150 gs1 pes
adamc@171	2151 in
adamc@819	2152 case exhaustive (env, et, map #1 pes', loc) of
adamc@819	2153 NONE => ()
adamc@830	2154 \| SOME p => if !mayDelay then
adamc@830	2155 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830	2156 else
adamc@830	2157 expError env (Inexhaustive (loc, p));
adamc@172	2158
adamc@628	2159 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171	2160 end
adamc@447	2161
adamc@447	2162 \| L.ELet (eds, e) =>
adamc@447	2163 let
adamc@447	2164 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447	2165 val (e, t, gs2) = elabExp (env, denv) e
adamc@447	2166 in
adamc@825	2167 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447	2168 end
adamc@280	2169 in
adamc@819	2170 (prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];)
adamc@280	2171 r
adamc@91	2172 end
adamc@31	2173
adamc@628	2174 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447	2175 let
adamc@447	2176 val r =
adamc@447	2177 case d of
adamc@825	2178 L.EDVal (p, e) =>
adamc@447	2179 let
adamc@825	2180 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825	2181 val (e', et, gs1) = elabExp (env, denv) e
adamc@825	2182
adamc@825	2183 val () = checkCon env e' et pt
adamc@825	2184
adamc@825	2185 val pt = normClassConstraint env pt
adamc@447	2186 in
adamc@830	2187 case exhaustive (env, et, [p'], loc) of
adamc@830	2188 NONE => ()
adamc@830	2189 \| SOME p => if !mayDelay then
adamc@830	2190 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830	2191 else
adamc@830	2192 expError env (Inexhaustive (loc, p));
adamc@830	2193
adamc@825	2194 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447	2195 end
adamc@447	2196 \| L.EDValRec vis =>
adamc@447	2197 let
adamc@447	2198 fun allowable (e, _) =
adamc@447	2199 case e of
adamc@447	2200 L.EAbs _ => true
adamc@447	2201 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	2202 \| L.EKAbs (_, e) => allowable e
adamc@447	2203 \| L.EDisjoint (_, _, e) => allowable e
adamc@447	2204 \| _ => false
adamc@447	2205
adamc@447	2206 val (vis, gs) = ListUtil.foldlMap
adamc@447	2207 (fn ((x, co, e), gs) =>
adamc@447	2208 let
adamc@447	2209 val (c', _, gs1) = case co of
adamc@447	2210 NONE => (cunif (loc, ktype), ktype, [])
adamc@447	2211 \| SOME c => elabCon (env, denv) c
adamc@447	2212 in
adamc@447	2213 ((x, c', e), enD gs1 @ gs)
adamc@447	2214 end) gs vis
adamc@447	2215
adamc@447	2216 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447	2217
adamc@447	2218 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447	2219 let
adamc@447	2220 val (e', et, gs1) = elabExp (env, denv) e
adamc@447	2221 in
adamc@628	2222 checkCon env e' et c';
adamc@447	2223 if allowable e then
adamc@447	2224 ()
adamc@447	2225 else
adamc@447	2226 expError env (IllegalRec (x, e'));
adamc@628	2227 ((x, c', e'), gs1 @ gs)
adamc@447	2228 end) gs vis
adamc@447	2229 in
adamc@447	2230 ((L'.EDValRec vis, loc), (env, gs))
adamc@447	2231 end
adamc@447	2232 in
adamc@447	2233 r
adamc@447	2234 end
adamc@447	2235
adamc@42	2236 val hnormSgn = E.hnormSgn
adamc@31	2237
adamc@210	2238 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338	2239 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754	2240 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754	2241 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459	2242 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718	2243 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205	2244
adamc@469	2245 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469	2246 case E.lookupStr env str of
adamc@469	2247 NONE => (strError env (UnboundStr (loc, str));
adamc@469	2248 denv)
adamc@469	2249 \| SOME (n, sgn) =>
adamc@469	2250 let
adamc@469	2251 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469	2252 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469	2253 NONE => (strError env (UnboundStr (loc, m));
adamc@469	2254 (strerror, sgnerror))
adamc@469	2255 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469	2256 ((L'.StrVar n, loc), sgn) strs
adamc@1030	2257
adamc@1030	2258 fun collect first (st, sgn) =
adamc@1030	2259 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182	2260 NONE => []
adamc@1030	2261 \| SOME cs =>
adamc@1030	2262 case #1 (hnormSgn env sgn) of
adamc@1030	2263 L'.SgnConst sgis =>
adamc@1030	2264 foldl (fn (sgi, cs) =>
adamc@1030	2265 case #1 sgi of
adamc@1030	2266 L'.SgiStr (x, _, _) =>
adamc@1030	2267 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030	2268 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030	2269 \| SOME sgn' =>
adamc@1030	2270 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030	2271 cs))
adamc@1030	2272 \| _ => cs) cs sgis
adamc@1030	2273 \| _ => cs
adamc@469	2274 in
adamc@1030	2275 foldl (fn ((c1, c2), denv) =>
adamc@1030	2276 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469	2277 end
adamc@469	2278
adamc@88	2279 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270	2280 ((Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));)
adamc@1270	2281 case sgi of
adamc@1270	2282 L.SgiConAbs (x, k) =>
adamc@1270	2283 let
adamc@1270	2284 val k' = elabKind env k
adamc@1270	2285
adamc@1270	2286 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270	2287 in
adamc@1270	2288 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270	2289 end
adamc@1270	2290
adamc@1270	2291 \| L.SgiCon (x, ko, c) =>
adamc@1270	2292 let
adamc@1270	2293 val k' = case ko of
adamc@1270	2294 NONE => kunif loc
adamc@1270	2295 \| SOME k => elabKind env k
adamc@1270	2296
adamc@1270	2297 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2298 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270	2299 in
adamc@1270	2300 checkKind env c' ck k';
adamc@1270	2301
adamc@1270	2302 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2303 end
adamc@1270	2304
adamc@1270	2305 \| L.SgiDatatype dts =>
adamc@1270	2306 let
adamc@1270	2307 val k = (L'.KType, loc)
adamc@1270	2308
adamc@1270	2309 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270	2310 let
adamc@1270	2311 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2312 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270	2313 in
adamc@1270	2314 ((x, n, xs, xcs), env)
adamc@1270	2315 end)
adamc@1270	2316 env dts
adamc@1270	2317
adamc@1270	2318 val (dts, env) = ListUtil.foldlMap
adamc@1270	2319 (fn ((x, n, xs, xcs), env) =>
adamc@1270	2320 let
adamc@1270	2321 val t = (L'.CNamed n, loc)
adamc@1270	2322 val nxs = length xs - 1
adamc@1270	2323 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270	2324 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270	2325
adamc@1270	2326 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270	2327 (E.pushCRel env' x k,
adamc@1270	2328 D.enter denv')) (env, denv) xs
adamc@1270	2329
adamc@1270	2330 val (xcs, (used, env, gs)) =
adamc@1270	2331 ListUtil.foldlMap
adamc@1270	2332 (fn ((x, to), (used, env, gs)) =>
adamc@1270	2333 let
adamc@1270	2334 val (to, t, gs') = case to of
adamc@1270	2335 NONE => (NONE, t, gs)
adamc@1270	2336 \| SOME t' =>
adamc@1270	2337 let
adamc@1270	2338 val (t', tk, gs') =
adamc@1270	2339 elabCon (env', denv') t'
adamc@1270	2340 in
adamc@1270	2341 checkKind env' t' tk k;
adamc@1270	2342 (SOME t',
adamc@1270	2343 (L'.TFun (t', t), loc),
adamc@1270	2344 gs' @ gs)
adamc@1270	2345 end
adamc@1270	2346 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2347 t xs
adamc@1270	2348
adamc@1270	2349 val (env, n') = E.pushENamed env x t
adamc@1270	2350 in
adamc@1270	2351 if SS.member (used, x) then
adamc@1270	2352 strError env (DuplicateConstructor (x, loc))
adamc@1270	2353 else
adamc@1270	2354 ();
adamc@1270	2355 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270	2356 end)
adamc@1270	2357 (SS.empty, env, []) xcs
adamc@1270	2358 in
adamc@1270	2359 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270	2360 end)
adamc@1270	2361 env dts
adamc@1270	2362 in
adamc@1270	2363 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270	2364 end
adamc@1270	2365
adamc@1270	2366 \| L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270	2367
adamc@1270	2368 \| L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270	2369 (case E.lookupStr env m1 of
adamc@1270	2370 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270	2371 ([], (env, denv, gs)))
adamc@1270	2372 \| SOME (n, sgn) =>
adamc@1270	2373 let
adamc@1270	2374 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270	2375 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270	2376 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270	2377 (strerror, sgnerror))
adamc@1270	2378 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270	2379 ((L'.StrVar n, loc), sgn) ms
adamc@1270	2380 in
adamc@1270	2381 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270	2382 (L'.CModProj (n, ms, s), _) =>
adamc@1270	2383 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270	2384 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270	2385 ([], (env, denv, [])))
adamc@1270	2386 \| SOME (xs, xncs) =>
adamc@1270	2387 let
adamc@1270	2388 val k = (L'.KType, loc)
adamc@1270	2389 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2390
adamc@1270	2391 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270	2392 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270	2393 val env = E.pushDatatype env n' xs xncs
adamc@1270	2394
adamc@1270	2395 val t = (L'.CNamed n', loc)
adamc@1270	2396 val env = foldl (fn ((x, n, to), env) =>
adamc@805	2397 let
adamc@1270	2398 val t = case to of
adamc@1270	2399 NONE => t
adamc@1270	2400 \| SOME t' => (L'.TFun (t', t), loc)
adamc@1270	2401
adamc@1270	2402 val t = foldr (fn (x, t) =>
adamc@1270	2403 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2404 t xs
adamc@805	2405 in
adamc@1270	2406 E.pushENamedAs env x n t
adamc@1270	2407 end) env xncs
adamc@1270	2408 in
adamc@1270	2409 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270	2410 end)
adamc@1270	2411 \| _ => (strError env (NotDatatype loc);
adamc@1270	2412 ([], (env, denv, [])))
adamc@1270	2413 end)
adamc@1270	2414
adamc@1270	2415 \| L.SgiVal (x, c) =>
adamc@1270	2416 let
adamc@1270	2417 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2418
adamc@1270	2419 val old = c'
adamc@1270	2420 val c' = normClassConstraint env c'
adamc@1270	2421 val (env', n) = E.pushENamed env x c'
adamc@1270	2422 in
adamc@1270	2423 (unifyKinds env ck ktype
adamc@1270	2424 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@1270	2425
adamc@1270	2426 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2427 end
adamc@1270	2428
adamc@1270	2429 \| L.SgiTable (x, c, pe, ce) =>
adamc@1270	2430 let
adamc@1270	2431 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270	2432
adamc@1270	2433 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2434 val pkey = cunif (loc, cstK)
adamc@1270	2435 val visible = cunif (loc, cstK)
adamc@1270	2436 val (env', ds, uniques) =
adamc@1270	2437 case (#1 pe, #1 ce) of
adamc@1270	2438 (L.EVar (["Basis"], "no_primary_key", _), L.EVar (["Basis"], "no_constraint", _)) =>
adamc@1270	2439 let
adamc@1270	2440 val x' = x ^ "_hidden_constraints"
adamc@1270	2441 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@1270	2442 val hidden = (L'.CNamed hidden_n, loc)
adamc@1270	2443 in
adamc@1270	2444 (env', [(L'.SgiConAbs (x', hidden_n, cstK), loc)], (L'.CConcat (visible, hidden), loc))
adamc@1270	2445 end
adamc@1270	2446 \| _ => (env, [], visible)
adamc@1270	2447
adamc@1270	2448 val ct = tableOf ()
adamc@1270	2449 val ct = (L'.CApp (ct, c'), loc)
adamc@1270	2450 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270	2451
adamc@1270	2452 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270	2453 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707	2454 \| _ => NONE) gs''
adamc@707	2455
adamc@1270	2456 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270	2457 val pst = (L'.CApp (pst, c'), loc)
adamc@1270	2458 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270	2459
adamc@1270	2460 val (env', n) = E.pushENamed env' x ct
adamc@1270	2461
adamc@1270	2462 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270	2463 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270	2464 \| _ => NONE) gs'''
adamc@1270	2465
adamc@1270	2466 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270	2467 val cst = (L'.CApp (cst, c'), loc)
adamc@1270	2468 val cst = (L'.CApp (cst, visible), loc)
adamc@1270	2469 in
adamc@1270	2470 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270	2471 checkCon env' pe' pet pst;
adamc@1270	2472 checkCon env' ce' cet cst;
adamc@1270	2473
adamc@1270	2474 (ds @ [(L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270	2475 end
adamc@1270	2476
adamc@1270	2477 \| L.SgiStr (x, sgn) =>
adamc@1270	2478 let
adamc@1270	2479 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2480 val (env', n) = E.pushStrNamed env x sgn'
adamc@1270	2481 in
adamc@1270	2482 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270	2483 end
adamc@1270	2484
adamc@1270	2485 \| L.SgiSgn (x, sgn) =>
adamc@1270	2486 let
adamc@1270	2487 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2488 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270	2489 in
adamc@1270	2490 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270	2491 end
adamc@1270	2492
adamc@1270	2493 \| L.SgiInclude sgn =>
adamc@1270	2494 let
adamc@1270	2495 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2496 in
adamc@1270	2497 case #1 (hnormSgn env sgn') of
adamc@1270	2498 L'.SgnConst sgis =>
adamc@1270	2499 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270	2500 \| _ => (sgnError env (NotIncludable sgn');
adamc@1270	2501 ([], (env, denv, [])))
adamc@1270	2502 end
adamc@1270	2503
adamc@1270	2504 \| L.SgiConstraint (c1, c2) =>
adamc@1270	2505 let
adamc@1270	2506 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270	2507 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270	2508
adamc@1270	2509 val denv = D.assert env denv (c1', c2')
adamc@1270	2510 in
adamc@1270	2511 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@1270	2512 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@1270	2513
adamc@1270	2514 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270	2515 end
adamc@1270	2516
adamc@1270	2517 \| L.SgiClassAbs (x, k) =>
adamc@1270	2518 let
adamc@1270	2519 val k = elabKind env k
adamc@1270	2520 val (env, n) = E.pushCNamed env x k NONE
adamc@1270	2521 val env = E.pushClass env n
adamc@1270	2522 in
adamc@1270	2523 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270	2524 end
adamc@1270	2525
adamc@1270	2526 \| L.SgiClass (x, k, c) =>
adamc@1270	2527 let
adamc@1270	2528 val k = elabKind env k
adamc@1270	2529 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270	2530 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270	2531 val env = E.pushClass env n
adamc@1270	2532 in
adamc@1270	2533 checkKind env c' ck k;
adamc@1270	2534 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270	2535 end)
adamc@211	2536
adamc@83	2537 and elabSgn (env, denv) (sgn, loc) =
adamc@31	2538 case sgn of
adamc@31	2539 L.SgnConst sgis =>
adamc@31	2540 let
adamc@88	2541 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62	2542
adamc@62	2543 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62	2544 case sgi of
adamc@62	2545 L'.SgiConAbs (x, _, _) =>
adamc@62	2546 (if SS.member (cons, x) then
adamc@62	2547 sgnError env (DuplicateCon (loc, x))
adamc@62	2548 else
adamc@62	2549 ();
adamc@62	2550 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2551 \| L'.SgiCon (x, _, _, _) =>
adamc@62	2552 (if SS.member (cons, x) then
adamc@62	2553 sgnError env (DuplicateCon (loc, x))
adamc@62	2554 else
adamc@62	2555 ();
adamc@62	2556 (SS.add (cons, x), vals, sgns, strs))
adamc@805	2557 \| L'.SgiDatatype dts =>
adamc@156	2558 let
adamc@805	2559 val (cons, vals) =
adamc@805	2560 let
adamc@805	2561 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805	2562 let
adamc@805	2563 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805	2564 (if SS.member (vals, x) then
adamc@805	2565 sgnError env (DuplicateVal (loc, x))
adamc@805	2566 else
adamc@805	2567 ();
adamc@805	2568 SS.add (vals, x)))
adamc@805	2569 vals xncs
adamc@805	2570 in
adamc@805	2571 if SS.member (cons, x) then
adamc@805	2572 sgnError env (DuplicateCon (loc, x))
adamc@805	2573 else
adamc@805	2574 ();
adamc@805	2575 (SS.add (cons, x), vals)
adamc@805	2576 end
adamc@805	2577 in
adamc@805	2578 foldl doOne (cons, vals) dts
adamc@805	2579 end
adamc@156	2580 in
adamc@805	2581 (cons, vals, sgns, strs)
adamc@156	2582 end
adamc@191	2583 \| L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156	2584 (if SS.member (cons, x) then
adamc@156	2585 sgnError env (DuplicateCon (loc, x))
adamc@156	2586 else
adamc@156	2587 ();
adamc@156	2588 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2589 \| L'.SgiVal (x, _, _) =>
adamc@62	2590 (if SS.member (vals, x) then
adamc@62	2591 sgnError env (DuplicateVal (loc, x))
adamc@62	2592 else
adamc@62	2593 ();
adamc@62	2594 (cons, SS.add (vals, x), sgns, strs))
adamc@62	2595 \| L'.SgiSgn (x, _, _) =>
adamc@62	2596 (if SS.member (sgns, x) then
adamc@62	2597 sgnError env (DuplicateSgn (loc, x))
adamc@62	2598 else
adamc@62	2599 ();
adamc@62	2600 (cons, vals, SS.add (sgns, x), strs))
adamc@62	2601 \| L'.SgiStr (x, _, _) =>
adamc@62	2602 (if SS.member (strs, x) then
adamc@62	2603 sgnError env (DuplicateStr (loc, x))
adamc@62	2604 else
adamc@62	2605 ();
adamc@88	2606 (cons, vals, sgns, SS.add (strs, x)))
adamc@203	2607 \| L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563	2608 \| L'.SgiClassAbs (x, _, _) =>
adamc@211	2609 (if SS.member (cons, x) then
adamc@211	2610 sgnError env (DuplicateCon (loc, x))
adamc@211	2611 else
adamc@211	2612 ();
adamc@211	2613 (SS.add (cons, x), vals, sgns, strs))
adamc@563	2614 \| L'.SgiClass (x, _, _, _) =>
adamc@211	2615 (if SS.member (cons, x) then
adamc@211	2616 sgnError env (DuplicateCon (loc, x))
adamc@211	2617 else
adamc@211	2618 ();
adamc@460	2619 (SS.add (cons, x), vals, sgns, strs)))
adamc@62	2620 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31	2621 in
adamc@83	2622 ((L'.SgnConst sgis', loc), gs)
adamc@31	2623 end
adamc@31	2624 \| L.SgnVar x =>
adamc@31	2625 (case E.lookupSgn env x of
adamc@31	2626 NONE =>
adamc@31	2627 (sgnError env (UnboundSgn (loc, x));
adamc@83	2628 ((L'.SgnError, loc), []))
adamc@83	2629 \| SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41	2630 \| L.SgnFun (m, dom, ran) =>
adamc@41	2631 let
adamc@83	2632 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	2633 val (env', n) = E.pushStrNamed env m dom'
adamc@469	2634 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469	2635 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41	2636 in
adamc@83	2637 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41	2638 end
adamc@42	2639 \| L.SgnWhere (sgn, x, c) =>
adamc@42	2640 let
adamc@83	2641 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83	2642 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42	2643 in
adamc@42	2644 case #1 (hnormSgn env sgn') of
adamc@83	2645 L'.SgnError => (sgnerror, [])
adamc@42	2646 \| L'.SgnConst sgis =>
adamc@75	2647 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75	2648 x' = x andalso
adamc@623	2649 (unifyKinds env k ck
adamc@75	2650 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42	2651 true)
adamc@42	2652 \| _ => false) sgis then
adamc@83	2653 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42	2654 else
adamc@42	2655 (sgnError env (UnWhereable (sgn', x));
adamc@83	2656 (sgnerror, []))
adamc@42	2657 \| _ => (sgnError env (UnWhereable (sgn', x));
adamc@83	2658 (sgnerror, []))
adamc@42	2659 end
adamc@59	2660 \| L.SgnProj (m, ms, x) =>
adamc@59	2661 (case E.lookupStr env m of
adamc@59	2662 NONE => (strError env (UnboundStr (loc, m));
adamc@83	2663 (sgnerror, []))
adamc@59	2664 \| SOME (n, sgn) =>
adamc@59	2665 let
adamc@59	2666 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59	2667 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59	2668 NONE => (strError env (UnboundStr (loc, m));
adamc@59	2669 (strerror, sgnerror))
adamc@59	2670 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59	2671 ((L'.StrVar n, loc), sgn) ms
adamc@59	2672 in
adamc@59	2673 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59	2674 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83	2675 (sgnerror, []))
adamc@83	2676 \| SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59	2677 end)
adamc@59	2678
adamc@31	2679
adamc@706	2680 and selfify env {str, strs, sgn} =
adamc@66	2681 case #1 (hnormSgn env sgn) of
adamc@66	2682 L'.SgnError => sgn
adamc@66	2683 \| L'.SgnVar _ => sgn
adamc@66	2684
adamc@66	2685 \| L'.SgnConst sgis =>
adam@1387	2686 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387	2687 (fn (sgi, env) =>
adam@1387	2688 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387	2689 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2690 \| (L'.SgiDatatype dts, loc) =>
adam@1387	2691 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387	2692 \| (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387	2693 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2694 \| (L'.SgiStr (x, n, sgn), loc) =>
adam@1387	2695 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387	2696 \| x => [x],
adam@1387	2697 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66	2698 \| L'.SgnFun _ => sgn
adamc@66	2699 \| L'.SgnWhere _ => sgn
adamc@66	2700 \| L'.SgnProj (m, ms, x) =>
adamc@66	2701 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2702 (L'.StrVar m, #2 sgn) ms,
adamc@66	2703 sgn = #2 (E.lookupStrNamed env m),
adamc@66	2704 field = x} of
adamc@66	2705 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66	2706 \| SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66	2707
adamc@706	2708 and selfifyAt env {str, sgn} =
adamc@66	2709 let
adamc@66	2710 fun self (str, _) =
adamc@66	2711 case str of
adamc@66	2712 L'.StrVar x => SOME (x, [])
adamc@66	2713 \| L'.StrProj (str, x) =>
adamc@66	2714 (case self str of
adamc@66	2715 NONE => NONE
adamc@66	2716 \| SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66	2717 \| _ => NONE
adamc@66	2718 in
adamc@66	2719 case self str of
adamc@66	2720 NONE => sgn
adamc@66	2721 \| SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66	2722 end
adamc@66	2723
adamc@706	2724 and dopen env {str, strs, sgn} =
adamc@66	2725 let
adamc@66	2726 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2727 (L'.StrVar str, #2 sgn) strs
adamc@66	2728 in
adamc@66	2729 case #1 (hnormSgn env sgn) of
adamc@66	2730 L'.SgnConst sgis =>
adamc@805	2731 ListUtil.foldlMapConcat
adamc@805	2732 (fn ((sgi, loc), env') =>
adamc@805	2733 let
adamc@805	2734 val d =
adamc@805	2735 case sgi of
adamc@805	2736 L'.SgiConAbs (x, n, k) =>
adamc@805	2737 let
adamc@805	2738 val c = (L'.CModProj (str, strs, x), loc)
adamc@805	2739 in
adamc@805	2740 [(L'.DCon (x, n, k, c), loc)]
adamc@805	2741 end
adamc@805	2742 \| L'.SgiCon (x, n, k, c) =>
adamc@805	2743 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805	2744 \| L'.SgiDatatype dts =>
adamc@805	2745 map (fn (x, n, xs, xncs) => (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@805	2746 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@805	2747 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adamc@805	2748 \| L'.SgiVal (x, n, t) =>
adamc@805	2749 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adamc@805	2750 \| L'.SgiStr (x, n, sgn) =>
adamc@805	2751 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adamc@805	2752 \| L'.SgiSgn (x, n, sgn) =>
adamc@805	2753 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adamc@805	2754 \| L'.SgiConstraint (c1, c2) =>
adamc@805	2755 [(L'.DConstraint (c1, c2), loc)]
adamc@805	2756 \| L'.SgiClassAbs (x, n, k) =>
adamc@805	2757 let
adamc@805	2758 val c = (L'.CModProj (str, strs, x), loc)
adamc@805	2759 in
adamc@805	2760 [(L'.DCon (x, n, k, c), loc)]
adamc@805	2761 end
adamc@805	2762 \| L'.SgiClass (x, n, k, _) =>
adamc@805	2763 let
adamc@805	2764 val c = (L'.CModProj (str, strs, x), loc)
adamc@805	2765 in
adamc@805	2766 [(L'.DCon (x, n, k, c), loc)]
adamc@805	2767 end
adamc@805	2768 in
adamc@805	2769 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805	2770 end)
adamc@805	2771 env sgis
adamc@66	2772 \| _ => (strError env (UnOpenable sgn);
adamc@628	2773 ([], env))
adamc@66	2774 end
adamc@66	2775
adamc@706	2776 and sgiOfDecl (d, loc) =
adamc@31	2777 case d of
adamc@123	2778 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156	2779 \| L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156	2780 \| L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123	2781 \| L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123	2782 \| L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123	2783 \| L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123	2784 \| L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	2785 \| L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	2786 \| L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123	2787 \| L'.DExport _ => []
adamc@707	2788 \| L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707	2789 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707	2790 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460	2791 \| L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754	2792 \| L'.DView (tn, x, n, _, c) =>
adamc@754	2793 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563	2794 \| L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271	2795 \| L'.DDatabase _ => []
adamc@460	2796 \| L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720	2797 \| L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075	2798 \| L'.DTask _ => []
adamc@1199	2799 \| L'.DPolicy _ => []
adam@1294	2800 \| L'.DOnError _ => []
adamc@88	2801
adamc@1000	2802 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469	2803 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469	2804 ("sgn2", p_sgn env sgn2)];*)
adamc@35	2805 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31	2806 (L'.SgnError, _) => ()
adamc@31	2807 \| (_, L'.SgnError) => ()
adamc@31	2808
adamc@31	2809 \| (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31	2810 let
adamc@362	2811 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362	2812 ("sgn2", p_sgn env sgn2),
adamc@362	2813 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362	2814 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362	2815
adamc@838	2816 fun cpart n = IM.find (!counterparts, n)
adamc@838	2817 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838	2818
adamc@838	2819 val sub2 = U.Con.map {kind = fn k => k,
adamc@838	2820 con = fn c =>
adamc@838	2821 case c of
adamc@838	2822 L'.CNamed n2 =>
adamc@838	2823 (case cpart n2 of
adamc@838	2824 NONE => c
adamc@838	2825 \| SOME n1 => L'.CNamed n1)
adamc@838	2826 \| _ => c}
adamc@838	2827
adamc@628	2828 fun folder (sgi2All as (sgi, loc), env) =
adamc@31	2829 let
adamc@362	2830 (val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))])
adamc@362	2831
adamc@805	2832 fun seek' f p =
adamc@31	2833 let
adamc@628	2834 fun seek env ls =
adamc@31	2835 case ls of
adamc@805	2836 [] => f env
adamc@31	2837 \| h :: t =>
adamc@469	2838 case p (env, h) of
adamc@469	2839 NONE =>
adamc@469	2840 let
adamc@469	2841 val env = case #1 h of
adamc@469	2842 L'.SgiCon (x, n, k, c) =>
adamc@471	2843 if E.checkENamed env n then
adamc@471	2844 env
adamc@471	2845 else
adamc@471	2846 E.pushCNamedAs env x n k (SOME c)
adamc@469	2847 \| L'.SgiConAbs (x, n, k) =>
adamc@471	2848 if E.checkENamed env n then
adamc@471	2849 env
adamc@471	2850 else
adamc@471	2851 E.pushCNamedAs env x n k NONE
adamc@469	2852 \| _ => env
adamc@469	2853 in
adamc@628	2854 seek (E.sgiBinds env h) t
adamc@469	2855 end
adamc@88	2856 \| SOME envs => envs
adamc@31	2857 in
adamc@628	2858 seek env sgis1
adamc@31	2859 end
adamc@805	2860
adamc@1000	2861 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805	2862 env))
adamc@31	2863 in
adamc@31	2864 case sgi of
adamc@31	2865 L'.SgiConAbs (x, n2, k2) =>
adamc@469	2866 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31	2867 let
adamc@41	2868 fun found (x', n1, k1, co1) =
adamc@41	2869 if x = x' then
adamc@41	2870 let
adamc@623	2871 val () = unifyKinds env k1 k2
adamc@41	2872 handle KUnify (k1, k2, err) =>
adamc@1000	2873 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000	2874 sgi2All, k2, err))
adamc@41	2875 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41	2876 in
adamc@41	2877 SOME (if n1 = n2 then
adamc@41	2878 env
adamc@41	2879 else
adamc@838	2880 (cparts (n2, n1);
adamc@838	2881 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41	2882 end
adamc@41	2883 else
adamc@41	2884 NONE
adamc@31	2885 in
adamc@31	2886 case sgi1 of
adamc@41	2887 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41	2888 \| L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805	2889 \| L'.SgiDatatype dts =>
adamc@191	2890 let
adamc@191	2891 val k = (L'.KType, loc)
adamc@805	2892
adamc@805	2893 fun search dts =
adamc@805	2894 case dts of
adamc@805	2895 [] => NONE
adamc@805	2896 \| (x', n1, xs, _) :: dts =>
adamc@805	2897 let
adamc@805	2898 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	2899 in
adamc@805	2900 case found (x', n1, k', NONE) of
adamc@805	2901 NONE => search dts
adamc@805	2902 \| x => x
adamc@805	2903 end
adamc@191	2904 in
adamc@805	2905 search dts
adamc@191	2906 end
adamc@191	2907 \| L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191	2908 let
adamc@191	2909 val k = (L'.KType, loc)
adamc@191	2910 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191	2911 in
adamc@191	2912 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191	2913 end
adamc@711	2914 \| L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711	2915 \| L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31	2916 \| _ => NONE
adamc@31	2917 end)
adamc@31	2918
adamc@31	2919 \| L'.SgiCon (x, n2, k2, c2) =>
adamc@469	2920 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211	2921 let
adamc@211	2922 fun found (x', n1, k1, c1) =
adamc@211	2923 if x = x' then
adamc@211	2924 let
adamc@838	2925 val c2 = sub2 c2
adamc@838	2926
adamc@327	2927 fun good () =
adamc@327	2928 let
adamc@327	2929 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327	2930 val env = if n1 = n2 then
adamc@327	2931 env
adamc@327	2932 else
adamc@839	2933 (cparts (n2, n1);
adamc@839	2934 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327	2935 in
adamc@628	2936 SOME env
adamc@327	2937 end
adamc@211	2938 in
adamc@987	2939 (unifyCons env loc c1 c2;
adamc@628	2940 good ())
adamc@211	2941 handle CUnify (c1, c2, err) =>
adamc@1000	2942 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000	2943 sgi2All, c2, err));
adamc@211	2944 good ())
adamc@211	2945 end
adamc@211	2946 else
adamc@211	2947 NONE
adamc@211	2948 in
adamc@211	2949 case sgi1 of
adamc@211	2950 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711	2951 \| L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	2952 \| _ => NONE
adamc@211	2953 end)
adamc@31	2954
adamc@805	2955 \| L'.SgiDatatype dts2 =>
adamc@805	2956 let
adamc@805	2957 fun found' (sgi1All, (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805	2958 if x1 <> x2 then
adamc@805	2959 NONE
adamc@805	2960 else
adamc@805	2961 let
adamc@805	2962 fun mismatched ue =
adamc@1000	2963 (sgnError env (SgiMismatchedDatatypes (strLoc, sgi1All, sgi2All, ue));
adamc@805	2964 SOME env)
adamc@805	2965
adamc@805	2966 val k = (L'.KType, loc)
adamc@805	2967 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805	2968
adamc@805	2969 fun good () =
adamc@805	2970 let
adamc@805	2971 val env = E.sgiBinds env sgi1All
adamc@805	2972 val env = if n1 = n2 then
adamc@805	2973 env
adamc@805	2974 else
adamc@838	2975 (cparts (n2, n1);
adamc@838	2976 E.pushCNamedAs env x1 n2 k'
adamc@838	2977 (SOME (L'.CNamed n1, loc)))
adamc@805	2978 in
adamc@805	2979 SOME env
adamc@805	2980 end
adamc@805	2981
adamc@805	2982 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805	2983 val env = if n1 = n2 then
adamc@805	2984 env
adamc@805	2985 else
adamc@838	2986 (cparts (n2, n1);
adamc@838	2987 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805	2988 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805	2989 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805	2990 String.compare (x1, x2) <> EQUAL
adamc@805	2991 orelse case (t1, t2) of
adamc@805	2992 (NONE, NONE) => false
adamc@805	2993 \| (SOME t1, SOME t2) =>
adamc@987	2994 (unifyCons env loc t1 (sub2 t2); false)
adamc@805	2995 \| _ => true
adamc@805	2996 in
adamc@805	2997 (if xs1 <> xs2
adamc@805	2998 orelse length xncs1 <> length xncs2
adamc@805	2999 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805	3000 mismatched NONE
adamc@160	3001 else
adamc@805	3002 good ())
adamc@805	3003 handle CUnify ue => mismatched (SOME ue)
adamc@805	3004 end
adamc@805	3005 in
adamc@805	3006 seek'
adamc@805	3007 (fn _ =>
adamc@805	3008 let
adamc@805	3009 fun seekOne (dt2, env) =
adamc@805	3010 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3011 case sgi1 of
adamc@805	3012 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805	3013 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805	3014 \| _ => NONE)
adamc@805	3015
adamc@805	3016 fun seekAll (dts, env) =
adamc@805	3017 case dts of
adamc@805	3018 [] => env
adamc@805	3019 \| dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805	3020 in
adamc@805	3021 seekAll (dts2, env)
adamc@805	3022 end)
adamc@805	3023 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3024 let
adamc@805	3025 fun found dts1 =
adamc@805	3026 let
adamc@805	3027 fun iter (dts1, dts2, env) =
adamc@805	3028 case (dts1, dts2) of
adamc@805	3029 ([], []) => SOME env
adamc@805	3030 \| (dt1 :: dts1, dt2 :: dts2) =>
adamc@805	3031 (case found' (sgi1All, dt1, dt2, env) of
adamc@805	3032 NONE => NONE
adamc@805	3033 \| SOME env => iter (dts1, dts2, env))
adamc@805	3034 \| _ => NONE
adamc@805	3035 in
adamc@805	3036 iter (dts1, dts2, env)
adamc@805	3037 end
adamc@805	3038 in
adamc@805	3039 case sgi1 of
adamc@805	3040 L'.SgiDatatype dts1 => found dts1
adamc@805	3041 \| _ => NONE
adamc@805	3042 end)
adamc@805	3043 end
adamc@156	3044
adamc@191	3045 \| L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469	3046 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158	3047 case sgi1 of
adamc@191	3048 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158	3049 if x = x' then
adamc@158	3050 let
adamc@158	3051 val k = (L'.KType, loc)
adamc@191	3052 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158	3053 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158	3054 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158	3055
adamc@158	3056 fun good () =
adamc@158	3057 let
adamc@191	3058 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191	3059 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158	3060 in
adamc@838	3061 cparts (n2, n1);
adamc@628	3062 SOME env
adamc@158	3063 end
adamc@158	3064 in
adamc@987	3065 (unifyCons env loc t1 t2;
adamc@628	3066 good ())
adamc@158	3067 handle CUnify (c1, c2, err) =>
adamc@1000	3068 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@158	3069 good ())
adamc@158	3070 end
adamc@158	3071 else
adamc@158	3072 NONE
adamc@158	3073
adamc@158	3074 \| _ => NONE)
adamc@156	3075
adamc@32	3076 \| L'.SgiVal (x, n2, c2) =>
adamc@469	3077 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32	3078 case sgi1 of
adamc@41	3079 L'.SgiVal (x', n1, c1) =>
adamc@41	3080 if x = x' then
adamc@838	3081 ((*prefaces "val" [("x", PD.string x),
adamc@838	3082 ("n1", PD.string (Int.toString n1)),
adamc@838	3083 ("c1", p_con env c1),
adamc@838	3084 ("c2", p_con env c2),
adamc@838	3085 ("c2'", p_con env (sub2 c2))];*)
adamc@987	3086 unifyCons env loc c1 (sub2 c2);
adamc@628	3087 SOME env)
adamc@86	3088 handle CUnify (c1, c2, err) =>
adamc@1000	3089 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@628	3090 SOME env)
adamc@41	3091 else
adamc@41	3092 NONE
adamc@32	3093 \| _ => NONE)
adamc@32	3094
adamc@33	3095 \| L'.SgiStr (x, n2, sgn2) =>
adamc@469	3096 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33	3097 case sgi1 of
adamc@41	3098 L'.SgiStr (x', n1, sgn1) =>
adamc@41	3099 if x = x' then
adamc@66	3100 let
adamc@1000	3101 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@66	3102 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66	3103 val env = if n1 = n2 then
adamc@66	3104 env
adamc@66	3105 else
adamc@66	3106 E.pushStrNamedAs env x n2
adamc@66	3107 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66	3108 sgn = sgn2})
adamc@66	3109 in
adamc@628	3110 SOME env
adamc@66	3111 end
adamc@41	3112 else
adamc@41	3113 NONE
adamc@33	3114 \| _ => NONE)
adamc@59	3115
adamc@59	3116 \| L'.SgiSgn (x, n2, sgn2) =>
adamc@469	3117 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59	3118 case sgi1 of
adamc@59	3119 L'.SgiSgn (x', n1, sgn1) =>
adamc@59	3120 if x = x' then
adamc@65	3121 let
adamc@1000	3122 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@1000	3123 val () = subSgn' counterparts env strLoc sgn2 sgn1
adamc@65	3124
adamc@65	3125 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65	3126 val env = if n1 = n2 then
adamc@65	3127 env
adamc@65	3128 else
adamc@838	3129 (cparts (n2, n1);
adamc@838	3130 E.pushSgnNamedAs env x n1 sgn2)
adamc@65	3131 in
adamc@628	3132 SOME env
adamc@65	3133 end
adamc@59	3134 else
adamc@59	3135 NONE
adamc@59	3136 \| _ => NONE)
adamc@88	3137
adamc@88	3138 \| L'.SgiConstraint (c2, d2) =>
adamc@469	3139 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88	3140 case sgi1 of
adamc@88	3141 L'.SgiConstraint (c1, d1) =>
adamc@987	3142 if consEq env loc (c1, c2)
adamc@987	3143 andalso consEq env loc (d1, d2) then
adamc@628	3144 SOME env
adamc@88	3145 else
adamc@88	3146 NONE
adamc@88	3147 \| _ => NONE)
adamc@203	3148
adamc@563	3149 \| L'.SgiClassAbs (x, n2, k2) =>
adamc@469	3150 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211	3151 let
adamc@563	3152 fun found (x', n1, k1, co) =
adamc@211	3153 if x = x' then
adamc@211	3154 let
adamc@623	3155 val () = unifyKinds env k1 k2
adamc@563	3156 handle KUnify (k1, k2, err) =>
adamc@1000	3157 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000	3158 sgi2All, k2, err))
adamc@563	3159
adamc@711	3160 val env = E.pushCNamedAs env x n1 k1 co
adamc@211	3161 in
adamc@211	3162 SOME (if n1 = n2 then
adamc@211	3163 env
adamc@211	3164 else
adamc@838	3165 (cparts (n2, n1);
adamc@838	3166 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211	3167 end
adamc@211	3168 else
adamc@211	3169 NONE
adamc@211	3170 in
adamc@211	3171 case sgi1 of
adamc@563	3172 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563	3173 \| L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211	3174 \| _ => NONE
adamc@211	3175 end)
adamc@563	3176 \| L'.SgiClass (x, n2, k2, c2) =>
adamc@469	3177 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211	3178 let
adamc@563	3179 fun found (x', n1, k1, c1) =
adamc@211	3180 if x = x' then
adamc@211	3181 let
adamc@623	3182 val () = unifyKinds env k1 k2
adamc@563	3183 handle KUnify (k1, k2, err) =>
adamc@1000	3184 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000	3185 sgi2All, k2, err))
adamc@563	3186
adamc@838	3187 val c2 = sub2 c2
adamc@838	3188
adamc@218	3189 fun good () =
adamc@218	3190 let
adamc@711	3191 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218	3192 val env = if n1 = n2 then
adamc@218	3193 env
adamc@218	3194 else
adamc@839	3195 (cparts (n2, n1);
adamc@839	3196 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218	3197 in
adamc@628	3198 SOME env
adamc@218	3199 end
adamc@211	3200 in
adamc@987	3201 (unifyCons env loc c1 c2;
adamc@628	3202 good ())
adamc@211	3203 handle CUnify (c1, c2, err) =>
adamc@1000	3204 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000	3205 sgi2All, c2, err));
adamc@211	3206 good ())
adamc@211	3207 end
adamc@211	3208 else
adamc@211	3209 NONE
adamc@211	3210 in
adamc@211	3211 case sgi1 of
adamc@563	3212 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	3213 \| _ => NONE
adamc@211	3214 end)
adamc@31	3215 end
adamc@31	3216 in
adamc@628	3217 ignore (foldl folder env sgis2)
adamc@31	3218 end
adamc@31	3219
adamc@41	3220 \| (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43	3221 let
adamc@480	3222 val ran2 =
adamc@43	3223 if n1 = n2 then
adamc@480	3224 ran2
adamc@43	3225 else
adamc@480	3226 subStrInSgn (n2, n1) ran2
adamc@43	3227 in
adamc@1000	3228 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000	3229 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43	3230 end
adamc@41	3231
adamc@1000	3232 \| _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41	3233
adamc@838	3234 and subSgn env = subSgn' (ref IM.empty) env
adamc@61	3235
adamc@706	3236 and positive self =
adamc@312	3237 let
adamc@312	3238 open L
adamc@312	3239
adamc@312	3240 fun none (c, _) =
adamc@312	3241 case c of
adamc@312	3242 CAnnot (c, _) => none c
adamc@312	3243
adamc@312	3244 \| TFun (c1, c2) => none c1 andalso none c2
adamc@312	3245 \| TCFun (_, _, _, c) => none c
adamc@312	3246 \| TRecord c => none c
adamc@312	3247
adamc@312	3248 \| CVar ([], x) => x <> self
adamc@312	3249 \| CVar _ => true
adamc@312	3250 \| CApp (c1, c2) => none c1 andalso none c2
adamc@312	3251 \| CAbs _ => false
adamc@628	3252 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3253
adamc@623	3254 \| CKAbs _ => false
adamc@623	3255 \| TKFun _ => false
adamc@623	3256
adamc@312	3257 \| CName _ => true
adamc@312	3258
adamc@312	3259 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312	3260 \| CConcat (c1, c2) => none c1 andalso none c2
adamc@621	3261 \| CMap => true
adamc@312	3262
adamc@312	3263 \| CUnit => true
adamc@312	3264
adamc@312	3265 \| CTuple cs => List.all none cs
adamc@312	3266 \| CProj (c, _) => none c
adamc@312	3267
adamc@312	3268 \| CWild _ => false
adamc@312	3269
adamc@312	3270 fun pos (c, _) =
adamc@312	3271 case c of
adamc@312	3272 CAnnot (c, _) => pos c
adamc@312	3273
adamc@312	3274 \| TFun (c1, c2) => none c1 andalso pos c2
adamc@312	3275 \| TCFun (_, _, _, c) => pos c
adamc@312	3276 \| TRecord c => pos c
adamc@312	3277
adamc@312	3278 \| CVar _ => true
adamc@312	3279 \| CApp (c1, c2) => pos c1 andalso none c2
adamc@312	3280 \| CAbs _ => false
adamc@628	3281 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3282
adamc@623	3283 \| CKAbs _ => false
adamc@623	3284 \| TKFun _ => false
adamc@623	3285
adamc@312	3286 \| CName _ => true
adamc@312	3287
adamc@312	3288 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312	3289 \| CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621	3290 \| CMap => true
adamc@312	3291
adamc@312	3292 \| CUnit => true
adamc@312	3293
adamc@312	3294 \| CTuple cs => List.all pos cs
adamc@312	3295 \| CProj (c, _) => pos c
adamc@312	3296
adamc@312	3297 \| CWild _ => false
adamc@312	3298 in
adamc@312	3299 pos
adamc@312	3300 end
adamc@312	3301
adamc@706	3302 and wildifyStr env (str, sgn) =
adamc@325	3303 case #1 (hnormSgn env sgn) of
adamc@325	3304 L'.SgnConst sgis =>
adamc@325	3305 (case #1 str of
adamc@325	3306 L.StrConst ds =>
adamc@325	3307 let
adamc@1270	3308 fun cname d =
adamc@1270	3309 case d of
adamc@1270	3310 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270	3311 \| L'.SgiConAbs (x, _, _) => SOME x
adamc@1270	3312 \| L'.SgiClass (x, _, _, _) => SOME x
adamc@1270	3313 \| L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270	3314 \| _ => NONE
adamc@1270	3315
adamc@1270	3316 fun dname (d, _) =
adamc@1270	3317 case d of
adamc@1270	3318 L.DCon (x, _, _) => SOME x
adamc@1270	3319 \| L.DClass (x, _, _) => SOME x
adamc@1270	3320 \| _ => NONE
adamc@1270	3321
adamc@493	3322 fun decompileKind (k, loc) =
adamc@493	3323 case k of
adamc@493	3324 L'.KType => SOME (L.KType, loc)
adamc@493	3325 \| L'.KArrow (k1, k2) =>
adamc@493	3326 (case (decompileKind k1, decompileKind k2) of
adamc@493	3327 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493	3328 \| _ => NONE)
adamc@493	3329 \| L'.KName => SOME (L.KName, loc)
adamc@493	3330 \| L'.KRecord k =>
adamc@493	3331 (case decompileKind k of
adamc@493	3332 SOME k => SOME (L.KRecord k, loc)
adamc@493	3333 \| _ => NONE)
adamc@493	3334 \| L'.KUnit => SOME (L.KUnit, loc)
adamc@493	3335 \| L'.KTuple ks =>
adamc@493	3336 let
adamc@493	3337 val ks' = List.mapPartial decompileKind ks
adamc@493	3338 in
adamc@493	3339 if length ks' = length ks then
adamc@493	3340 SOME (L.KTuple ks', loc)
adamc@493	3341 else
adamc@493	3342 NONE
adamc@493	3343 end
adamc@493	3344
adamc@493	3345 \| L'.KError => NONE
adamc@493	3346 \| L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493	3347 \| L'.KUnif _ => NONE
adam@1302	3348 \| L'.KTupleUnif (_, _, ref (SOME k)) => decompileKind k
adam@1302	3349 \| L'.KTupleUnif _ => NONE
adamc@493	3350
adamc@623	3351 \| L'.KRel _ => NONE
adamc@623	3352 \| L'.KFun _ => NONE
adamc@623	3353
adamc@325	3354 fun decompileCon env (c, loc) =
adamc@325	3355 case c of
adamc@325	3356 L'.CRel i =>
adamc@325	3357 let
adamc@325	3358 val (s, _) = E.lookupCRel env i
adamc@325	3359 in
adamc@325	3360 SOME (L.CVar ([], s), loc)
adamc@325	3361 end
adamc@325	3362 \| L'.CNamed i =>
adamc@325	3363 let
adamc@325	3364 val (s, _, _) = E.lookupCNamed env i
adamc@325	3365 in
adamc@325	3366 SOME (L.CVar ([], s), loc)
adamc@325	3367 end
adamc@325	3368 \| L'.CModProj (m1, ms, x) =>
adamc@325	3369 let
adamc@325	3370 val (s, _) = E.lookupStrNamed env m1
adamc@325	3371 in
adamc@325	3372 SOME (L.CVar (s :: ms, x), loc)
adamc@325	3373 end
adamc@325	3374 \| L'.CName s => SOME (L.CName s, loc)
adamc@325	3375 \| L'.CRecord (_, xcs) =>
adamc@325	3376 let
adamc@325	3377 fun fields xcs =
adamc@325	3378 case xcs of
adamc@325	3379 [] => SOME []
adamc@325	3380 \| (x, t) :: xcs =>
adamc@325	3381 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325	3382 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325	3383 \| _ => NONE
adamc@325	3384 in
adamc@325	3385 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325	3386 (fields xcs)
adamc@325	3387 end
adamc@325	3388 \| L'.CConcat (c1, c2) =>
adamc@325	3389 (case (decompileCon env c1, decompileCon env c2) of
adamc@325	3390 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325	3391 \| _ => NONE)
adamc@325	3392 \| L'.CUnit => SOME (L.CUnit, loc)
adam@1303	3393 \| L'.CUnif (nl, _, _, _, ref (SOME c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325	3394
adamc@325	3395 \| _ => NONE
adamc@325	3396
adamc@1264	3397 fun buildNeeded env sgis =
adamc@1275	3398 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264	3399 (case sgi of
adamc@1275	3400 L'.SgiCon (x, _, k, c) => naddCon (nd, x, (k, SOME c))
adamc@1275	3401 \| L'.SgiConAbs (x, _, k) => naddCon (nd, x, (k, NONE))
adamc@1264	3402 \| L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264	3403 \| L'.SgiVal (x, _, t) =>
adamc@1264	3404 let
adamc@1277	3405 fun should t =
adamc@1277	3406 let
adamc@1277	3407 val t = normClassConstraint env' t
adamc@1277	3408 in
adamc@1277	3409 case #1 t of
adamc@1277	3410 L'.CApp (f, _) => isClassOrFolder env' f
adamc@1277	3411 \| L'.TRecord t =>
adamc@1277	3412 (case hnormCon env' t of
adamc@1277	3413 (L'.CApp (f, _), _) =>
adamc@1277	3414 (case hnormCon env' f of
adamc@1277	3415 (L'.CApp (f, cl), loc) =>
adamc@1277	3416 (case hnormCon env' f of
adamc@1277	3417 (L'.CMap _, _) => isClassOrFolder env' cl
adamc@1277	3418 \| _ => false)
adamc@1277	3419 \| _ => false)
adamc@1277	3420 \| _ => false)
adamc@1277	3421 \| _ => false
adamc@1277	3422 end
adamc@1270	3423 in
adamc@1277	3424 if should t then
adamc@1277	3425 naddVal (nd, x)
adamc@1277	3426 else
adamc@1277	3427 nd
adamc@1264	3428 end
adamc@1264	3429 \| L'.SgiStr (x, _, s) =>
adamc@1270	3430 (case #1 (hnormSgn env' s) of
adamc@1270	3431 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264	3432 \| _ => nd)
adamc@1264	3433 \| _ => nd,
adamc@1275	3434 E.sgiBinds env' (sgi, loc)))
adamc@1275	3435 (nempty, env) sgis)
adamc@1264	3436
adamc@1264	3437 val nd = buildNeeded env sgis
adamc@1264	3438
adamc@1264	3439 fun removeUsed (nd, ds) =
adamc@1264	3440 foldl (fn ((d, _), nd) =>
adamc@634	3441 case d of
adamc@1264	3442 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264	3443 \| L.DClass (x, _, _) => ndelCon (nd, x)
adamc@1264	3444 \| L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264	3445 \| L.DOpen _ => nempty
adamc@1264	3446 \| L.DStr (x, _, (L.StrConst ds', _)) =>
adamc@1264	3447 (case SM.find (nmods nd, x) of
adamc@1264	3448 NONE => nd
adamc@1270	3449 \| SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264	3450 \| _ => nd)
adamc@1264	3451 nd ds
adamc@1264	3452
adamc@1264	3453 val nd = removeUsed (nd, ds)
adamc@1264	3454
adamc@1270	3455 fun extend (env, nd, ds) =
adamc@1264	3456 let
adamc@1264	3457 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264	3458 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264	3459 (SOME c1, SOME c2) =>
adamc@1264	3460 SOME (L.DConstraint (c1, c2), loc)
adamc@1264	3461 \| _ => NONE) (nconstraints nd)
adamc@1264	3462
adamc@1264	3463 val ds' =
adamc@1264	3464 case SS.listItems (nvals nd) of
adamc@1264	3465 [] => ds'
adamc@1264	3466 \| xs =>
adamc@1264	3467 let
adamc@1264	3468 val ewild = (L.EWild, #2 str)
adamc@1264	3469 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264	3470 in
adamc@1264	3471 ds'' @ ds'
adamc@1264	3472 end
adamc@1264	3473
adamc@1275	3474 val ds' =
adamc@1264	3475 case SM.listItemsi (ncons nd) of
adamc@1275	3476 [] => ds'
adamc@1264	3477 \| xs =>
adamc@1275	3478 map (fn (x, (k, co)) =>
adamc@1270	3479 let
adamc@1270	3480 val k =
adamc@1270	3481 case decompileKind k of
adamc@1270	3482 NONE => (L.KWild, #2 str)
adamc@1270	3483 \| SOME k => k
adamc@1275	3484
adamc@1270	3485 val cwild = (L.CWild k, #2 str)
adamc@1270	3486 val c =
adamc@1270	3487 case co of
adamc@1270	3488 NONE => cwild
adamc@1270	3489 \| SOME c =>
adamc@1270	3490 case decompileCon env c of
adamc@1270	3491 NONE => cwild
adamc@1270	3492 \| SOME c' => c'
adamc@1270	3493 in
adamc@1275	3494 (L.DCon (x, NONE, c), #2 str)
adamc@1275	3495 end) xs @ ds'
adamc@1275	3496
adamc@1275	3497 val ds = ds @ ds'
adamc@1264	3498 in
adamc@1270	3499 map (fn d as (L.DStr (x, s, (L.StrConst ds', loc')), loc) =>
adamc@1270	3500 (case SM.find (nmods nd, x) of
adamc@1270	3501 NONE => d
adamc@1270	3502 \| SOME (env, nd') =>
adamc@1270	3503 (L.DStr (x, s, (L.StrConst (extend (env, nd', ds')), loc')), loc))
adamc@1270	3504 \| d => d) ds
adamc@1264	3505 end
adamc@325	3506 in
adamc@1270	3507 (L.StrConst (extend (env, nd, ds)), #2 str)
adamc@325	3508 end
adamc@325	3509 \| _ => str)
adamc@325	3510 \| _ => str
adamc@325	3511
adamc@706	3512 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255	3513 let
adamc@904	3514 (val () = preface ("elabDecl", SourcePrint.p_decl dAll))
adamc@514	3515 (val befor = Time.now ())
adamc@255	3516
adamc@255	3517 val r =
adamc@255	3518 case d of
adamc@255	3519 L.DCon (x, ko, c) =>
adamc@255	3520 let
adamc@255	3521 val k' = case ko of
adamc@255	3522 NONE => kunif loc
adamc@623	3523 \| SOME k => elabKind env k
adamc@255	3524
adamc@255	3525 val (c', ck, gs') = elabCon (env, denv) c
adamc@255	3526 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255	3527 in
adamc@255	3528 checkKind env c' ck k';
adamc@255	3529
adamc@255	3530 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3531 end
adamc@805	3532 \| L.DDatatype dts =>
adamc@255	3533 let
adamc@255	3534 val k = (L'.KType, loc)
adamc@805	3535
adamc@805	3536 val (dts, env) = ListUtil.foldlMap
adamc@805	3537 (fn ((x, xs, xcs), env) =>
adamc@805	3538 let
adamc@805	3539 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	3540 val (env, n) = E.pushCNamed env x k' NONE
adamc@805	3541 in
adamc@805	3542 ((x, n, xs, xcs), env)
adamc@805	3543 end)
adamc@805	3544 env dts
adamc@805	3545
adamc@805	3546 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805	3547 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805	3548 let
adamc@805	3549 val t = (L'.CNamed n, loc)
adamc@805	3550 val nxs = length xs - 1
adamc@805	3551 val t = ListUtil.foldli
adamc@805	3552 (fn (i, _, t) =>
adamc@805	3553 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805	3554
adamc@805	3555 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805	3556 (E.pushCRel env' x k,
adamc@805	3557 D.enter denv')) (env, denv) xs
adamc@805	3558
adamc@805	3559 val (xcs, (used, env, gs')) =
adamc@805	3560 ListUtil.foldlMap
adamc@805	3561 (fn ((x, to), (used, env, gs)) =>
adamc@805	3562 let
adamc@805	3563 val (to, t, gs') = case to of
adamc@805	3564 NONE => (NONE, t, gs)
adamc@805	3565 \| SOME t' =>
adamc@805	3566 let
adamc@805	3567 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805	3568 in
adamc@805	3569 checkKind env' t' tk k;
adamc@805	3570 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805	3571 end
adamc@805	3572 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805	3573
adamc@805	3574 val (env, n') = E.pushENamed env x t
adamc@805	3575 in
adamc@805	3576 if SS.member (used, x) then
adamc@805	3577 strError env (DuplicateConstructor (x, loc))
adamc@805	3578 else
adamc@805	3579 ();
adamc@805	3580 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805	3581 end)
adamc@805	3582 (SS.empty, env, gs') xcs
adamc@805	3583 in
adamc@805	3584 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805	3585 end)
adamc@805	3586 (env, []) dts
adamc@255	3587 in
adamc@805	3588 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255	3589 end
adamc@255	3590
adamc@255	3591 \| L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255	3592
adamc@255	3593 \| L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255	3594 (case E.lookupStr env m1 of
adamc@255	3595 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255	3596 ([], (env, denv, gs)))
adamc@255	3597 \| SOME (n, sgn) =>
adamc@255	3598 let
adamc@255	3599 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255	3600 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255	3601 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255	3602 (strerror, sgnerror))
adamc@255	3603 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255	3604 ((L'.StrVar n, loc), sgn) ms
adamc@255	3605 in
adamc@628	3606 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628	3607 (L'.CModProj (n, ms, s), _) =>
adamc@255	3608 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255	3609 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255	3610 ([], (env, denv, gs)))
adamc@255	3611 \| SOME (xs, xncs) =>
adamc@255	3612 let
adamc@255	3613 val k = (L'.KType, loc)
adamc@255	3614 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255	3615 val t = (L'.CModProj (n, ms, s), loc)
adamc@255	3616 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255	3617 val env = E.pushDatatype env n' xs xncs
adamc@255	3618
adamc@255	3619 val t = (L'.CNamed n', loc)
adamc@844	3620 val nxs = length xs
adamc@844	3621 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844	3622 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844	3623 t xs
adamc@255	3624 val env = foldl (fn ((x, n, to), env) =>
adamc@255	3625 let
adamc@255	3626 val t = case to of
adamc@255	3627 NONE => t
adamc@255	3628 \| SOME t' => (L'.TFun (t', t), loc)
adamc@255	3629
adamc@255	3630 val t = foldr (fn (x, t) =>
adamc@255	3631 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255	3632 t xs
adamc@255	3633 in
adamc@255	3634 E.pushENamedAs env x n t
adamc@255	3635 end) env xncs
adamc@255	3636 in
adamc@628	3637 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255	3638 end)
adamc@255	3639 \| _ => (strError env (NotDatatype loc);
adamc@255	3640 ([], (env, denv, [])))
adamc@255	3641 end)
adamc@255	3642
adamc@255	3643 \| L.DVal (x, co, e) =>
adamc@255	3644 let
adamc@255	3645 val (c', _, gs1) = case co of
adamc@255	3646 NONE => (cunif (loc, ktype), ktype, [])
adamc@255	3647 \| SOME c => elabCon (env, denv) c
adamc@255	3648
adamc@255	3649 val (e', et, gs2) = elabExp (env, denv) e
adamc@629	3650
adamc@629	3651 val () = checkCon env e' et c'
adamc@629	3652
adamc@674	3653 val c' = normClassConstraint env c'
adamc@255	3654 val (env', n) = E.pushENamed env x c'
adamc@255	3655 in
adamc@255	3656 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362	3657 ("c'", p_con env c')];*)
adamc@628	3658 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255	3659 end
adamc@255	3660 \| L.DValRec vis =>
adamc@255	3661 let
adamc@255	3662 fun allowable (e, _) =
adamc@255	3663 case e of
adamc@255	3664 L.EAbs _ => true
adamc@255	3665 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	3666 \| L.EKAbs (_, e) => allowable e
adamc@255	3667 \| L.EDisjoint (_, _, e) => allowable e
adamc@255	3668 \| _ => false
adamc@255	3669
adamc@255	3670 val (vis, gs) = ListUtil.foldlMap
adamc@255	3671 (fn ((x, co, e), gs) =>
adamc@255	3672 let
adamc@255	3673 val (c', _, gs1) = case co of
adamc@255	3674 NONE => (cunif (loc, ktype), ktype, [])
adamc@255	3675 \| SOME c => elabCon (env, denv) c
adamc@674	3676 val c' = normClassConstraint env c'
adamc@255	3677 in
adamc@255	3678 ((x, c', e), enD gs1 @ gs)
adamc@280	3679 end) gs vis
adamc@255	3680
adamc@255	3681 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255	3682 let
adamc@255	3683 val (env, n) = E.pushENamed env x c'
adamc@255	3684 in
adamc@255	3685 ((x, n, c', e), env)
adamc@255	3686 end) env vis
adamc@255	3687
adamc@255	3688 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255	3689 let
adamc@255	3690 val (e', et, gs1) = elabExp (env, denv) e
adamc@255	3691 in
adamc@628	3692 checkCon env e' et c';
adamc@255	3693 if allowable e then
adamc@255	3694 ()
adamc@255	3695 else
adamc@255	3696 expError env (IllegalRec (x, e'));
adamc@628	3697 ((x, n, c', e'), gs1 @ gs)
adamc@255	3698 end) gs vis
adamc@255	3699 in
adamc@255	3700 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255	3701 end
adamc@255	3702
adamc@255	3703 \| L.DSgn (x, sgn) =>
adamc@255	3704 let
adamc@255	3705 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255	3706 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255	3707 in
adamc@255	3708 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3709 end
adamc@255	3710
adamc@255	3711 \| L.DStr (x, sgno, str) =>
adamc@255	3712 let
adamc@255	3713 val () = if x = "Basis" then
adamc@255	3714 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255	3715 else
adamc@255	3716 ()
adamc@255	3717
adamc@255	3718 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255	3719
adamc@255	3720 val (str', sgn', gs') =
adamc@255	3721 case formal of
adamc@255	3722 NONE =>
adamc@255	3723 let
adamc@255	3724 val (str', actual, gs') = elabStr (env, denv) str
adamc@255	3725 in
adamc@255	3726 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255	3727 end
adamc@255	3728 \| SOME (formal, gs1) =>
adamc@255	3729 let
adamc@325	3730 val str = wildifyStr env (str, formal)
adamc@255	3731 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255	3732 in
adamc@1000	3733 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255	3734 (str', formal, enD gs1 @ gs2)
adamc@255	3735 end
adamc@255	3736
adamc@255	3737 val (env', n) = E.pushStrNamed env x sgn'
adamc@834	3738 val denv' =
adamc@834	3739 case #1 str' of
adamc@834	3740 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022	3741 \| L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834	3742 \| _ => denv
adamc@255	3743 in
adamc@255	3744 case #1 (hnormSgn env sgn') of
adamc@255	3745 L'.SgnFun _ =>
adamc@255	3746 (case #1 str' of
adamc@255	3747 L'.StrFun _ => ()
adamc@255	3748 \| _ => strError env (FunctorRebind loc))
adamc@255	3749 \| _ => ();
adamc@834	3750 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255	3751 end
adamc@255	3752
adamc@255	3753 \| L.DFfiStr (x, sgn) =>
adamc@255	3754 let
adamc@255	3755 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255	3756
adamc@255	3757 val (env', n) = E.pushStrNamed env x sgn'
adamc@255	3758 in
adamc@255	3759 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3760 end
adamc@255	3761
adamc@255	3762 \| L.DOpen (m, ms) =>
adamc@255	3763 (case E.lookupStr env m of
adamc@255	3764 NONE => (strError env (UnboundStr (loc, m));
adamc@255	3765 ([], (env, denv, gs)))
adamc@255	3766 \| SOME (n, sgn) =>
adamc@255	3767 let
adamc@1030	3768 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030	3769 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030	3770 NONE => (strError env (UnboundStr (loc, m));
adamc@1030	3771 (strerror, sgnerror))
adamc@1030	3772 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030	3773 ((L'.StrVar n, loc), sgn) ms
adamc@1030	3774
adamc@1030	3775 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255	3776
adamc@628	3777 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628	3778 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255	3779 in
adamc@255	3780 (ds, (env', denv', gs))
adamc@255	3781 end)
adamc@255	3782
adamc@255	3783 \| L.DConstraint (c1, c2) =>
adamc@255	3784 let
adamc@255	3785 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255	3786 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255	3787 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255	3788
adamc@628	3789 val denv' = D.assert env denv (c1', c2')
adamc@255	3790 in
adamc@255	3791 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255	3792 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255	3793
adamc@628	3794 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255	3795 end
adamc@255	3796
adamc@255	3797 \| L.DOpenConstraints (m, ms) =>
adamc@255	3798 let
adamc@255	3799 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255	3800 in
adamc@255	3801 ([], (env, denv, gs))
adamc@255	3802 end
adamc@255	3803
adamc@255	3804 \| L.DExport str =>
adamc@255	3805 let
adamc@255	3806 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255	3807
adamc@255	3808 val sgn =
adamc@255	3809 case #1 (hnormSgn env sgn) of
adamc@255	3810 L'.SgnConst sgis =>
adamc@255	3811 let
adamc@255	3812 fun doOne (all as (sgi, _), env) =
adamc@255	3813 (case sgi of
adamc@255	3814 L'.SgiVal (x, n, t) =>
adamc@325	3815 let
adamc@325	3816 fun doPage (makeRes, ran) =
adamc@628	3817 case hnormCon env ran of
adamc@628	3818 (L'.CApp (tf, arg), _) =>
adamc@628	3819 (case (hnormCon env tf, hnormCon env arg) of
adamc@628	3820 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720	3821 (L'.CApp (tf, arg3), _)) =>
adamc@325	3822 (case (basis = !basis_r,
adamc@720	3823 hnormCon env tf, hnormCon env arg3) of
adamc@325	3824 (true,
adamc@720	3825 (L'.CApp (tf, arg2), _),
adamc@628	3826 ((L'.CRecord (_, []), _))) =>
adamc@720	3827 (case (hnormCon env tf) of
adamc@720	3828 (L'.CApp (tf, arg1), _) =>
adamc@720	3829 (case (hnormCon env tf,
adamc@720	3830 hnormCon env arg1,
adamc@720	3831 hnormCon env arg2) of
adamc@720	3832 (tf, arg1,
adamc@720	3833 (L'.CRecord (_, []), _)) =>
adamc@720	3834 let
adamc@720	3835 val t = (L'.CApp (tf, arg1), loc)
adamc@720	3836 val t = (L'.CApp (t, arg2), loc)
adamc@720	3837 val t = (L'.CApp (t, arg3), loc)
adamc@720	3838 val t = (L'.CApp (
adamc@720	3839 (L'.CModProj
adamc@720	3840 (basis, [], "transaction"), loc),
adamc@325	3841 t), loc)
adam@1347	3842
adam@1347	3843 fun normArgs t =
adam@1347	3844 case hnormCon env t of
adam@1347	3845 (L'.TFun (dom, ran), loc) =>
adam@1347	3846 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347	3847 \| t' => t'
adamc@720	3848 in
adam@1347	3849 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720	3850 end
adamc@325	3851 \| _ => all)
adamc@325	3852 \| _ => all)
adamc@325	3853 \| _ => all)
adamc@325	3854 \| _ => all)
adamc@325	3855 \| _ => all
adamc@325	3856 in
adamc@628	3857 case hnormCon env t of
adamc@628	3858 (L'.TFun (dom, ran), _) =>
adamc@628	3859 (case hnormCon env dom of
adamc@628	3860 (L'.TRecord domR, _) =>
adamc@325	3861 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325	3862 loc),
adamc@325	3863 t), loc), ran)
adamc@325	3864 \| _ => all)
adamc@325	3865 \| _ => doPage (fn t => t, t)
adamc@325	3866 end
adamc@255	3867 \| _ => all,
adamc@255	3868 E.sgiBinds env all)
adamc@255	3869 in
adamc@255	3870 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255	3871 end
adamc@255	3872 \| _ => sgn
adamc@255	3873 in
adamc@255	3874 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255	3875 end
adamc@255	3876
adamc@707	3877 \| L.DTable (x, c, pe, ce) =>
adamc@255	3878 let
adamc@707	3879 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707	3880
adamc@255	3881 val (c', k, gs') = elabCon (env, denv) c
adamc@707	3882 val pkey = cunif (loc, cstK)
adamc@707	3883 val uniques = cunif (loc, cstK)
adamc@705	3884
adamc@705	3885 val ct = tableOf ()
adamc@705	3886 val ct = (L'.CApp (ct, c'), loc)
adamc@707	3887 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705	3888
adamc@705	3889 val (env, n) = E.pushENamed env x ct
adamc@707	3890 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707	3891 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707	3892
adamc@707	3893 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707	3894 val pst = (L'.CApp (pst, c'), loc)
adamc@707	3895 val pst = (L'.CApp (pst, pkey), loc)
adamc@704	3896
adamc@704	3897 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704	3898 val cst = (L'.CApp (cst, c'), loc)
adamc@705	3899 val cst = (L'.CApp (cst, uniques), loc)
adamc@255	3900 in
adamc@255	3901 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707	3902 checkCon env pe' pet pst;
adamc@707	3903 checkCon env ce' cet cst;
adamc@707	3904 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707	3905 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255	3906 end
adamc@338	3907 \| L.DSequence x =>
adamc@338	3908 let
adamc@338	3909 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338	3910 in
adamc@338	3911 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338	3912 end
adamc@754	3913 \| L.DView (x, e) =>
adamc@754	3914 let
adamc@754	3915 val (e', t, gs') = elabExp (env, denv) e
adamc@754	3916
adamc@754	3917 val k = (L'.KRecord (L'.KType, loc), loc)
adamc@754	3918 val fs = cunif (loc, k)
adamc@754	3919 val ts = cunif (loc, (L'.KRecord k, loc))
adamc@754	3920 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754	3921 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754	3922 val ts = (L'.CApp (tf, ts), loc)
adamc@754	3923
adamc@754	3924 val cv = viewOf ()
adamc@754	3925 val cv = (L'.CApp (cv, fs), loc)
adamc@754	3926 val (env', n) = E.pushENamed env x cv
adamc@754	3927
adamc@754	3928 val ct = queryOf ()
adamc@1191	3929 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395	3930 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754	3931 val ct = (L'.CApp (ct, ts), loc)
adamc@754	3932 val ct = (L'.CApp (ct, fs), loc)
adamc@754	3933 in
adamc@754	3934 checkCon env e' t ct;
adamc@754	3935 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754	3936 (env', denv, gs' @ gs))
adamc@754	3937 end
adamc@255	3938
adamc@563	3939 \| L.DClass (x, k, c) =>
adamc@255	3940 let
adamc@623	3941 val k = elabKind env k
adamc@280	3942 val (c', ck, gs') = elabCon (env, denv) c
adamc@711	3943 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255	3944 val env = E.pushClass env n
adamc@255	3945 in
adamc@711	3946 checkKind env c' ck k;
adamc@563	3947 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255	3948 end
adamc@271	3949
adamc@280	3950 \| L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280	3951
adamc@459	3952 \| L.DCookie (x, c) =>
adamc@459	3953 let
adamc@459	3954 val (c', k, gs') = elabCon (env, denv) c
adamc@459	3955 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459	3956 in
adamc@459	3957 checkKind env c' k (L'.KType, loc);
adamc@459	3958 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459	3959 end
adamc@720	3960 \| L.DStyle x =>
adamc@718	3961 let
adamc@720	3962 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718	3963 in
adamc@720	3964 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718	3965 end
adamc@1075	3966 \| L.DTask (e1, e2) =>
adamc@1073	3967 let
adamc@1075	3968 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075	3969 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075	3970
adam@1348	3971 val targ = cunif (loc, (L'.KType, loc))
adam@1348	3972
adamc@1075	3973 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348	3974 val t1' = (L'.CApp (t1', targ), loc)
adam@1348	3975
adamc@1075	3976 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075	3977 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348	3978 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073	3979 in
adamc@1075	3980 checkCon env e1' t1 t1';
adamc@1075	3981 checkCon env e2' t2 t2';
adamc@1075	3982 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073	3983 end
adamc@1199	3984 \| L.DPolicy e1 =>
adamc@1199	3985 let
adamc@1199	3986 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199	3987
adamc@1199	3988 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199	3989 in
adamc@1199	3990 checkCon env e1' t1 t1';
adamc@1199	3991 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199	3992 end
adamc@459	3993
adam@1294	3994 \| L.DOnError (m1, ms, s) =>
adam@1294	3995 (case E.lookupStr env m1 of
adam@1294	3996 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294	3997 ([], (env, denv, [])))
adam@1294	3998 \| SOME (n, sgn) =>
adam@1294	3999 let
adam@1294	4000 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294	4001 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294	4002 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294	4003 (strerror, sgnerror))
adam@1294	4004 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294	4005 ((L'.StrVar n, loc), sgn) ms
adam@1294	4006
adam@1294	4007 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294	4008 NONE => (expError env (UnboundExp (loc, s));
adam@1294	4009 cerror)
adam@1294	4010 \| SOME t => t
adam@1294	4011
adam@1294	4012 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294	4013 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294	4014 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294	4015 in
adam@1407	4016 (unifyCons env loc t func
adam@1407	4017 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294	4018 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294	4019 end)
adam@1294	4020
adamc@280	4021 (val tcs = List.filter (fn TypeClass _ => true \| _ => false) (#3 (#2 r)))
adamc@255	4022 in
adamc@904	4023 (prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];)
adamc@255	4024 r
adamc@255	4025 end
adamc@211	4026
adamc@83	4027 and elabStr (env, denv) (str, loc) =
adamc@31	4028 case str of
adamc@31	4029 L.StrConst ds =>
adamc@31	4030 let
adamc@88	4031 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123	4032 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63	4033
adamc@63	4034 val (sgis, _, _, _, _) =
adamc@64	4035 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63	4036 case sgi of
adamc@64	4037 L'.SgiConAbs (x, n, k) =>
adamc@64	4038 let
adamc@64	4039 val (cons, x) =
adamc@64	4040 if SS.member (cons, x) then
adamc@64	4041 (cons, "?" ^ x)
adamc@64	4042 else
adamc@64	4043 (SS.add (cons, x), x)
adamc@64	4044 in
adamc@64	4045 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4046 end
adamc@64	4047 \| L'.SgiCon (x, n, k, c) =>
adamc@64	4048 let
adamc@64	4049 val (cons, x) =
adamc@64	4050 if SS.member (cons, x) then
adamc@64	4051 (cons, "?" ^ x)
adamc@64	4052 else
adamc@64	4053 (SS.add (cons, x), x)
adamc@64	4054 in
adamc@64	4055 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4056 end
adamc@805	4057 \| L'.SgiDatatype dts =>
adamc@156	4058 let
adamc@805	4059 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805	4060 let
adamc@805	4061 val (cons, x) =
adamc@805	4062 if SS.member (cons, x) then
adamc@805	4063 (cons, "?" ^ x)
adamc@156	4064 else
adamc@805	4065 (SS.add (cons, x), x)
adamc@805	4066
adamc@805	4067 val (xncs, vals) =
adamc@805	4068 ListUtil.foldlMap
adamc@805	4069 (fn ((x, n, t), vals) =>
adamc@805	4070 if SS.member (vals, x) then
adamc@805	4071 (("?" ^ x, n, t), vals)
adamc@805	4072 else
adamc@805	4073 ((x, n, t), SS.add (vals, x)))
adamc@805	4074 vals xncs
adamc@805	4075 in
adamc@805	4076 ((x, n, xs, xncs), (cons, vals))
adamc@805	4077 end
adamc@805	4078
adamc@805	4079 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156	4080 in
adamc@805	4081 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4082 end
adamc@191	4083 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156	4084 let
adamc@156	4085 val (cons, x) =
adamc@156	4086 if SS.member (cons, x) then
adamc@156	4087 (cons, "?" ^ x)
adamc@156	4088 else
adamc@156	4089 (SS.add (cons, x), x)
adamc@156	4090 in
adamc@191	4091 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4092 end
adamc@64	4093 \| L'.SgiVal (x, n, c) =>
adamc@64	4094 let
adamc@64	4095 val (vals, x) =
adamc@64	4096 if SS.member (vals, x) then
adamc@64	4097 (vals, "?" ^ x)
adamc@64	4098 else
adamc@64	4099 (SS.add (vals, x), x)
adamc@64	4100 in
adamc@64	4101 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4102 end
adamc@64	4103 \| L'.SgiSgn (x, n, sgn) =>
adamc@64	4104 let
adamc@64	4105 val (sgns, x) =
adamc@64	4106 if SS.member (sgns, x) then
adamc@64	4107 (sgns, "?" ^ x)
adamc@64	4108 else
adamc@64	4109 (SS.add (sgns, x), x)
adamc@64	4110 in
adamc@64	4111 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4112 end
adamc@64	4113
adamc@64	4114 \| L'.SgiStr (x, n, sgn) =>
adamc@64	4115 let
adamc@64	4116 val (strs, x) =
adamc@64	4117 if SS.member (strs, x) then
adamc@64	4118 (strs, "?" ^ x)
adamc@64	4119 else
adamc@64	4120 (SS.add (strs, x), x)
adamc@64	4121 in
adamc@64	4122 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88	4123 end
adamc@203	4124 \| L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563	4125 \| L'.SgiClassAbs (x, n, k) =>
adamc@211	4126 let
adamc@211	4127 val (cons, x) =
adamc@211	4128 if SS.member (cons, x) then
adamc@211	4129 (cons, "?" ^ x)
adamc@211	4130 else
adamc@211	4131 (SS.add (cons, x), x)
adamc@211	4132 in
adamc@563	4133 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211	4134 end
adamc@563	4135 \| L'.SgiClass (x, n, k, c) =>
adamc@211	4136 let
adamc@211	4137 val (cons, x) =
adamc@211	4138 if SS.member (cons, x) then
adamc@211	4139 (cons, "?" ^ x)
adamc@211	4140 else
adamc@211	4141 (SS.add (cons, x), x)
adamc@211	4142 in
adamc@563	4143 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203	4144 end)
adamc@64	4145
adamc@63	4146 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31	4147 in
adamc@83	4148 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31	4149 end
adamc@31	4150 \| L.StrVar x =>
adamc@31	4151 (case E.lookupStr env x of
adamc@31	4152 NONE =>
adamc@31	4153 (strError env (UnboundStr (loc, x));
adamc@83	4154 (strerror, sgnerror, []))
adamc@83	4155 \| SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34	4156 \| L.StrProj (str, x) =>
adamc@34	4157 let
adamc@83	4158 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34	4159 in
adamc@34	4160 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34	4161 NONE => (strError env (UnboundStr (loc, x));
adamc@83	4162 (strerror, sgnerror, []))
adamc@83	4163 \| SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34	4164 end
adamc@41	4165 \| L.StrFun (m, dom, ranO, str) =>
adamc@41	4166 let
adamc@83	4167 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	4168 val (env', n) = E.pushStrNamed env m dom'
adamc@834	4169 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834	4170 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41	4171
adamc@83	4172 val (formal, gs3) =
adamc@41	4173 case ranO of
adamc@83	4174 NONE => (actual, [])
adamc@41	4175 \| SOME ran =>
adamc@41	4176 let
adamc@834	4177 val (ran', gs) = elabSgn (env', denv') ran
adamc@41	4178 in
adamc@1000	4179 subSgn env' loc actual ran';
adamc@83	4180 (ran', gs)
adamc@41	4181 end
adamc@41	4182 in
adamc@41	4183 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83	4184 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228	4185 enD gs1 @ gs2 @ enD gs3)
adamc@41	4186 end
adamc@44	4187 \| L.StrApp (str1, str2) =>
adamc@44	4188 let
adamc@83	4189 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325	4190 val str2 =
adamc@325	4191 case sgn1 of
adamc@325	4192 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275	4193 let
adamc@1275	4194 val s = wildifyStr env (str2, dom)
adamc@1275	4195 in
adamc@1275	4196 (Print.preface ("Wild", SourcePrint.p_str s);)
adamc@1275	4197 s
adamc@1275	4198 end
adamc@325	4199 \| _ => str2
adamc@83	4200 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270	4201 in
adamc@44	4202 case #1 (hnormSgn env sgn1) of
adamc@83	4203 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4204 \| L'.SgnFun (m, n, dom, ran) =>
adamc@1000	4205 (subSgn env loc sgn2 dom;
adamc@44	4206 case #1 (hnormSgn env ran) of
adamc@83	4207 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4208 \| L'.SgnConst sgis =>
adamc@44	4209 ((L'.StrApp (str1', str2'), loc),
adamc@83	4210 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83	4211 gs1 @ gs2)
adamc@44	4212 \| _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44	4213 \| _ => (strError env (NotFunctor sgn1);
adamc@83	4214 (strerror, sgnerror, []))
adamc@44	4215 end
adamc@31	4216
adamc@987	4217 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833	4218
adamc@325	4219 fun elabFile basis topStr topSgn env file =
adamc@56	4220 let
adamc@713	4221 val () = mayDelay := true
adamc@713	4222 val () = delayedUnifs := []
adamc@830	4223 val () = delayedExhaustives := []
adamc@713	4224
adamc@83	4225 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83	4226 val () = case gs of
adamc@83	4227 [] => ()
adamc@207	4228 \| _ => (app (fn (_, env, _, c1, c2) =>
adamc@207	4229 prefaces "Unresolved"
adamc@207	4230 [("c1", p_con env c1),
adamc@207	4231 ("c2", p_con env c2)]) gs;
adamc@207	4232 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83	4233
adamc@56	4234 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210	4235 val () = basis_r := basis_n
adamc@56	4236
adamc@628	4237 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56	4238
adamc@56	4239 fun discoverC r x =
adamc@56	4240 case E.lookupC env' x of
adamc@56	4241 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56	4242 \| E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56	4243 \| E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56	4244
adamc@56	4245 val () = discoverC int "int"
adamc@56	4246 val () = discoverC float "float"
adamc@56	4247 val () = discoverC string "string"
adamc@821	4248 val () = discoverC char "char"
adamc@203	4249 val () = discoverC table "sql_table"
adamc@56	4250
adamc@325	4251 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325	4252 val () = case gs of
adamc@325	4253 [] => ()
adamc@325	4254 \| _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325	4255 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325	4256 val () = case gs of
adamc@325	4257 [] => ()
adamc@329	4258 \| _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329	4259 (case D.prove env denv (c1, c2, loc) of
adamc@329	4260 [] => ()
adamc@329	4261 \| _ =>
adamc@329	4262 (prefaces "Unresolved constraint in top.ur"
adamc@329	4263 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329	4264 ("c1", p_con env c1),
adamc@720	4265 ("c2", p_con env c2)];
adamc@478	4266 raise Fail "Unresolved constraint in top.ur"))
adamc@564	4267 \| TypeClass (env, c, r, loc) =>
adamc@564	4268 let
adamc@564	4269 val c = normClassKey env c
adamc@564	4270 in
adamc@833	4271 case resolveClass env c of
adamc@564	4272 SOME e => r := SOME e
adamc@564	4273 \| NONE => expError env (Unresolvable (loc, c))
adamc@634	4274 end) gs
adamc@564	4275
adamc@1000	4276 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720	4277
adamc@325	4278 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633	4279 val () = top_r := top_n
adamc@325	4280
adamc@628	4281 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325	4282
adamc@83	4283 fun elabDecl' (d, (env, gs)) =
adamc@76	4284 let
adamc@76	4285 val () = resetKunif ()
adamc@76	4286 val () = resetCunif ()
adam@1345	4287 val (ds, (env', _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76	4288 in
adam@1345	4289 (**)
adam@1345	4290 (ds, (env', gs))
adamc@76	4291 end
adamc@76	4292
adam@1345	4293 val (file, (env'', gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753	4294
adamc@777	4295 fun oneSummaryRound () =
adamc@777	4296 if ErrorMsg.anyErrors () then
adamc@777	4297 ()
adamc@777	4298 else
adamc@777	4299 let
adamc@777	4300 val delayed = !delayedUnifs
adamc@777	4301 in
adamc@777	4302 delayedUnifs := [];
adamc@777	4303 app (fn (loc, env, k, s1, s2) =>
adamc@777	4304 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777	4305 delayed
adamc@777	4306 end
adamc@56	4307 in
adamc@777	4308 oneSummaryRound ();
adamc@753	4309
adamc@753	4310 if ErrorMsg.anyErrors () then
adamc@753	4311 ()
adamc@753	4312 else
adamc@753	4313 let
adamc@753	4314 fun solver gs =
adamc@753	4315 let
adamc@753	4316 val (gs, solved) =
adamc@753	4317 ListUtil.foldlMapPartial
adamc@753	4318 (fn (g, solved) =>
adamc@753	4319 case g of
adamc@753	4320 Disjoint (loc, env, denv, c1, c2) =>
adamc@753	4321 (case D.prove env denv (c1, c2, loc) of
adamc@753	4322 [] => (NONE, true)
adamc@753	4323 \| _ => (SOME g, solved))
adamc@753	4324 \| TypeClass (env, c, r, loc) =>
adamc@753	4325 let
adamc@753	4326 fun default () = (SOME g, solved)
adamc@753	4327
adamc@753	4328 val c = normClassKey env c
adamc@753	4329 in
adamc@833	4330 case resolveClass env c of
adamc@753	4331 SOME e => (r := SOME e;
adamc@753	4332 (NONE, true))
adamc@753	4333 \| NONE =>
adamc@753	4334 case #1 (hnormCon env c) of
adamc@753	4335 L'.CApp (f, x) =>
adamc@753	4336 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753	4337 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753	4338 (case #1 (hnormCon env f) of
adamc@753	4339 L'.CModProj (top_n', [], "folder") =>
adamc@753	4340 if top_n' = top_n then
adamc@753	4341 let
adamc@753	4342 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753	4343 val e = (L'.EKApp (e, k), loc)
adamc@753	4344
adamc@753	4345 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753	4346 let
adamc@753	4347 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753	4348 "cons"), loc)
adamc@753	4349 val e = (L'.EKApp (e, k), loc)
adamc@753	4350 val e = (L'.ECApp (e,
adamc@753	4351 (L'.CRecord (k, xcs),
adamc@753	4352 loc)), loc)
adamc@753	4353 val e = (L'.ECApp (e, x), loc)
adamc@753	4354 val e = (L'.ECApp (e, c), loc)
adamc@753	4355 val e = (L'.EApp (e, folder), loc)
adamc@753	4356 in
adamc@753	4357 (e, (x, c) :: xcs)
adamc@753	4358 end)
adamc@753	4359 (e, []) xcs
adamc@753	4360 in
adamc@753	4361 (r := SOME folder;
adamc@753	4362 (NONE, true))
adamc@753	4363 end
adamc@753	4364 else
adamc@753	4365 default ()
adamc@753	4366 \| _ => default ())
adamc@753	4367 \| _ => default ())
adamc@753	4368 \| _ => default ()
adamc@753	4369 end)
adamc@753	4370 false gs
adamc@753	4371 in
adamc@753	4372 case (gs, solved) of
adamc@753	4373 ([], _) => ()
adamc@777	4374 \| (_, true) => (oneSummaryRound (); solver gs)
adamc@753	4375 \| _ =>
adamc@753	4376 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@1048	4377 let
adamc@1048	4378 val c1' = ElabOps.hnormCon env c1
adamc@1048	4379 val c2' = ElabOps.hnormCon env c2
adamc@1048	4380
adamc@1048	4381 fun isUnif (c, _) =
adamc@1048	4382 case c of
adamc@1048	4383 L'.CUnif _ => true
adamc@1048	4384 \| _ => false
adamc@1048	4385
adamc@1048	4386 fun maybeAttr (c, _) =
adamc@1048	4387 case c of
adamc@1048	4388 L'.CRecord ((L'.KType, _), xts) => true
adamc@1048	4389 \| _ => false
adamc@1048	4390 in
adamc@1048	4391 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@1048	4392 eprefaces' [("Con 1", p_con env c1),
adamc@1048	4393 ("Con 2", p_con env c2),
adamc@1048	4394 ("Hnormed 1", p_con env c1'),
adamc@1048	4395 ("Hnormed 2", p_con env c2')];
adamc@1048	4396
adam@1345	4397 (*app (fn (loc, env, k, s1, s2) =>
adam@1341	4398 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1341	4399 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1345	4400 (!delayedUnifs);*)
adam@1341	4401
adamc@1048	4402 if (isUnif c1' andalso maybeAttr c2')
adamc@1048	4403 orelse (isUnif c2' andalso maybeAttr c1') then
adamc@1048	4404 TextIO.output (TextIO.stdErr,
adamc@1048	4405 "You may be using a disallowed attribute with an HTML tag.\n")
adamc@1048	4406 else
adamc@1048	4407 ()
adamc@1048	4408 end
adamc@753	4409 \| TypeClass (env, c, r, loc) =>
adamc@753	4410 expError env (Unresolvable (loc, c)))
adamc@753	4411 gs
adamc@753	4412 end
adamc@753	4413 in
adamc@753	4414 solver gs
adamc@753	4415 end;
adamc@753	4416
adamc@713	4417 mayDelay := false;
adamc@713	4418
adamc@777	4419 if ErrorMsg.anyErrors () then
adamc@777	4420 ()
adamc@777	4421 else
adamc@777	4422 (app (fn (loc, env, k, s1, s2) =>
adamc@777	4423 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777	4424 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adamc@777	4425 cunifyError env err))
adamc@777	4426 (!delayedUnifs);
adamc@777	4427 delayedUnifs := []);
adamc@713	4428
adam@1346	4429 if ErrorMsg.anyErrors () then
adam@1346	4430 ()
adam@1346	4431 else
adam@1346	4432 ignore (List.exists (fn d => if kunifsInDecl d then
adam@1346	4433 (declError env'' (KunifsRemain [d]);
adam@1346	4434 true)
adam@1346	4435 else
adam@1346	4436 false) file);
adam@1345	4437
adam@1346	4438 if ErrorMsg.anyErrors () then
adam@1346	4439 ()
adam@1346	4440 else
adam@1346	4441 ignore (List.exists (fn d => case cunifsInDecl d of
adam@1346	4442 NONE => false
adam@1346	4443 \| SOME _ => (declError env'' (CunifsRemain [d]);
adam@1346	4444 true)) file);
adamc@750	4445
adamc@830	4446 if ErrorMsg.anyErrors () then
adamc@830	4447 ()
adamc@830	4448 else
adamc@837	4449 app (fn all as (env, _, _, loc) =>
adamc@830	4450 case exhaustive all of
adamc@830	4451 NONE => ()
adamc@830	4452 \| SOME p => expError env (Inexhaustive (loc, p)))
adamc@830	4453 (!delayedExhaustives);
adamc@830	4454
adamc@799	4455 (preface ("file", p_file env' file);)
adam@1345	4456
adamc@325	4457 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325	4458 :: ds
adamc@325	4459 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325	4460 :: ds' @ file
adamc@56	4461 end
adamc@2	4462
adamc@2	4463 end

Mercurial > urweb

annotate src/elaborate.sml @ 1505:8c851e5508a7