Ur/Web: src/elaborate.sml annotate

annotate src/elaborate.sml @ 1673:dae2c6fbf16c

Make Ubuntu linking patch more general

author	Adam Chlipala <adam@chlipala.net>
date	Tue, 10 Jan 2012 17:38:00 -0500
parents	64c1e65c2365
children	1584fd8d16dd

rev	line source
adam@1529	1 (* Copyright (c) 2008-2011, 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
adam@1531	41 val dumpTypes = ref false
adam@1531	42
adamc@819	43 structure IS = IntBinarySet
adamc@403	44 structure IM = IntBinaryMap
adamc@403	45
adamc@403	46 structure SK = struct
adamc@403	47 type ord_key = string
adamc@403	48 val compare = String.compare
adamc@403	49 end
adamc@403	50
adamc@403	51 structure SS = BinarySetFn(SK)
adamc@403	52 structure SM = BinaryMapFn(SK)
adamc@403	53
adamc@403	54 val basis_r = ref 0
adamc@633	55 val top_r = ref 0
adamc@403	56
adamc@403	57 fun elabExplicitness e =
adamc@403	58 case e of
adamc@403	59 L.Explicit => L'.Explicit
adamc@403	60 \| L.Implicit => L'.Implicit
adamc@403	61
adamc@403	62 fun occursKind r =
adamc@403	63 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403	64 \| _ => false)
adamc@403	65
adam@1639	66 fun validateCon env c =
adam@1639	67 (U.Con.appB {kind = fn env' => fn k => case k of
adam@1639	68 L'.KRel n => ignore (E.lookupKRel env' n)
adam@1639	69 \| L'.KUnif (_, _, r as ref (L'.KUnknown f)) =>
adam@1639	70 r := L'.KUnknown (fn k => f k andalso validateKind env' k)
adam@1639	71 \| _ => (),
adam@1639	72 con = fn env' => fn c => case c of
adam@1639	73 L'.CRel n => ignore (E.lookupCRel env' n)
adam@1639	74 \| L'.CNamed n => ignore (E.lookupCNamed env' n)
adam@1639	75 \| L'.CModProj (n, _, _) => ignore (E.lookupStrNamed env' n)
adam@1639	76 \| L'.CUnif (_, _, _, _, r as ref (L'.Unknown f)) =>
adam@1639	77 r := L'.Unknown (fn c => f c andalso validateCon env' c)
adam@1639	78 \| _ => (),
adam@1639	79 bind = fn (env', b) => case b of
adam@1639	80 U.Con.RelK x => E.pushKRel env' x
adam@1639	81 \| U.Con.RelC (x, k) => E.pushCRel env' x k
adam@1639	82 \| U.Con.NamedC (x, n, k, co) => E.pushCNamedAs env x n k co}
adam@1639	83 env c;
adam@1639	84 true)
adam@1639	85 handle _ => false
adam@1639	86
adam@1639	87 and validateKind env k = validateCon env (L'.CRecord (k, []), ErrorMsg.dummySpan)
adam@1639	88
adamc@403	89 exception KUnify' of kunify_error
adamc@403	90
adamc@623	91 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403	92 let
adamc@403	93 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403	94 in
adamc@403	95 case (k1, k2) of
adamc@403	96 (L'.KType, L'.KType) => ()
adamc@403	97 \| (L'.KUnit, L'.KUnit) => ()
adamc@403	98
adamc@403	99 \| (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623	100 (unifyKinds' env d1 d2;
adamc@623	101 unifyKinds' env r1 r2)
adamc@403	102 \| (L'.KName, L'.KName) => ()
adamc@623	103 \| (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403	104 \| (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623	105 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403	106 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403	107
adamc@623	108 \| (L'.KRel n1, L'.KRel n2) =>
adamc@623	109 if n1 = n2 then
adamc@623	110 ()
adamc@623	111 else
adamc@623	112 err KIncompatible
adamc@623	113 \| (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623	114 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623	115
adamc@403	116 \| (L'.KError, _) => ()
adamc@403	117 \| (_, L'.KError) => ()
adamc@403	118
adam@1639	119 \| (L'.KUnif (_, _, ref (L'.KKnown k1All)), _) => unifyKinds' env k1All k2All
adam@1639	120 \| (_, L'.KUnif (_, _, ref (L'.KKnown k2All))) => unifyKinds' env k1All k2All
adam@1639	121
adam@1639	122 \| (L'.KTupleUnif (_, _, ref (L'.KKnown k)), _) => unifyKinds' env k k2All
adam@1639	123 \| (_, L'.KTupleUnif (_, _, ref (L'.KKnown k))) => unifyKinds' env k1All k
adam@1639	124
adam@1639	125 \| (L'.KUnif (_, _, r1 as ref (L'.KUnknown f1)), L'.KUnif (_, _, r2 as ref (L'.KUnknown f2))) =>
adamc@403	126 if r1 = r2 then
adamc@403	127 ()
adamc@403	128 else
adam@1639	129 (r1 := L'.KKnown k2All;
adam@1639	130 r2 := L'.KUnknown (fn x => f1 x andalso f2 x))
adam@1639	131
adam@1639	132 \| (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@403	133 if occursKind r k2All then
adamc@403	134 err KOccursCheckFailed
adam@1639	135 else if not (f k2All) then
adam@1639	136 err KScope
adamc@403	137 else
adam@1639	138 r := L'.KKnown k2All
adam@1639	139 \| (_, L'.KUnif (_, _, r as ref (L'.KUnknown f))) =>
adamc@403	140 if occursKind r k1All then
adamc@403	141 err KOccursCheckFailed
adam@1639	142 else if not (f k1All) then
adam@1639	143 err KScope
adamc@403	144 else
adam@1639	145 r := L'.KKnown k1All
adam@1639	146
adam@1639	147 \| (L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f)), L'.KTuple ks) =>
adam@1639	148 if not (f k2All) then
adam@1639	149 err KScope
adam@1639	150 else
adam@1639	151 ((app (fn (n, k) => unifyKinds' env k (List.nth (ks, n-1))) nks;
adam@1639	152 r := L'.KKnown k2All)
adam@1639	153 handle Subscript => err KIncompatible)
adam@1639	154 \| (L'.KTuple ks, L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f))) =>
adam@1639	155 if not (f k2All) then
adam@1639	156 err KScope
adam@1639	157 else
adam@1639	158 ((app (fn (n, k) => unifyKinds' env (List.nth (ks, n-1)) k) nks;
adam@1639	159 r := L'.KKnown k1All)
adam@1639	160 handle Subscript => err KIncompatible)
adam@1639	161 \| (L'.KTupleUnif (loc, nks1, r1 as ref (L'.KUnknown f1)), L'.KTupleUnif (_, nks2, r2 as ref (L'.KUnknown f2))) =>
adam@1302	162 let
adam@1302	163 val nks = foldl (fn (p as (n, k1), nks) =>
adam@1302	164 case ListUtil.search (fn (n', k2) =>
adam@1302	165 if n' = n then
adam@1302	166 SOME k2
adam@1302	167 else
adam@1302	168 NONE) nks2 of
adam@1302	169 NONE => p :: nks
adam@1302	170 \| SOME k2 => (unifyKinds' env k1 k2;
adam@1302	171 nks)) nks2 nks1
adam@1302	172
adam@1639	173 val k = (L'.KTupleUnif (loc, nks, ref (L'.KUnknown (fn x => f1 x andalso f2 x))), loc)
adam@1302	174 in
adam@1639	175 r1 := L'.KKnown k;
adam@1639	176 r2 := L'.KKnown k
adam@1302	177 end
adam@1302	178
adamc@403	179 \| _ => err KIncompatible
adamc@403	180 end
adamc@403	181
adamc@403	182 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403	183
adamc@623	184 fun unifyKinds env k1 k2 =
adamc@623	185 unifyKinds' env k1 k2
adamc@403	186 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403	187
adamc@403	188 fun checkKind env c k1 k2 =
adamc@623	189 unifyKinds env k1 k2
adamc@403	190 handle KUnify (k1, k2, err) =>
adamc@403	191 conError env (WrongKind (c, k1, k2, err))
adamc@403	192
adamc@403	193 val dummy = ErrorMsg.dummySpan
adamc@403	194
adamc@403	195 val ktype = (L'.KType, dummy)
adamc@403	196 val kname = (L'.KName, dummy)
adamc@403	197 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403	198
adamc@403	199 val cerror = (L'.CError, dummy)
adamc@403	200 val kerror = (L'.KError, dummy)
adamc@403	201 val eerror = (L'.EError, dummy)
adamc@403	202 val sgnerror = (L'.SgnError, dummy)
adamc@403	203 val strerror = (L'.StrError, dummy)
adamc@403	204
adamc@403	205 val int = ref cerror
adamc@403	206 val float = ref cerror
adamc@403	207 val string = ref cerror
adamc@821	208 val char = ref cerror
adamc@403	209 val table = ref cerror
adamc@403	210
adam@1639	211
adamc@403	212 local
adamc@403	213 val count = ref 0
adamc@403	214 in
adamc@403	215
adamc@403	216 fun resetKunif () = count := 0
adamc@403	217
adam@1639	218 fun kunif' f loc =
adamc@403	219 let
adamc@403	220 val n = !count
adamc@403	221 val s = if n <= 26 then
adamc@403	222 str (chr (ord #"A" + n))
adamc@403	223 else
adamc@403	224 "U" ^ Int.toString (n - 26)
adamc@403	225 in
adamc@403	226 count := n + 1;
adam@1639	227 (L'.KUnif (loc, s, ref (L'.KUnknown f)), loc)
adamc@403	228 end
adamc@403	229
adam@1639	230 fun kunif env = kunif' (validateKind env)
adam@1639	231
adamc@403	232 end
adamc@403	233
adamc@403	234 local
adamc@403	235 val count = ref 0
adamc@403	236 in
adamc@403	237
adamc@403	238 fun resetCunif () = count := 0
adamc@403	239
adam@1639	240 fun cunif' f (loc, k) =
adamc@403	241 let
adamc@403	242 val n = !count
adamc@712	243 val s = if n < 26 then
adamc@403	244 str (chr (ord #"A" + n))
adamc@403	245 else
adamc@403	246 "U" ^ Int.toString (n - 26)
adamc@403	247 in
adamc@403	248 count := n + 1;
adam@1639	249 (L'.CUnif (0, loc, k, s, ref (L'.Unknown f)), loc)
adamc@403	250 end
adamc@403	251
adam@1639	252 fun cunif env = cunif' (validateCon env)
adam@1639	253
adamc@403	254 end
adamc@403	255
adamc@623	256 fun elabKind env (k, loc) =
adamc@403	257 case k of
adamc@403	258 L.KType => (L'.KType, loc)
adamc@623	259 \| L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403	260 \| L.KName => (L'.KName, loc)
adamc@623	261 \| L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403	262 \| L.KUnit => (L'.KUnit, loc)
adamc@623	263 \| L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adam@1639	264 \| L.KWild => kunif env loc
adamc@403	265
adamc@623	266 \| L.KVar s => (case E.lookupK env s of
adamc@623	267 NONE =>
adamc@623	268 (kindError env (UnboundKind (loc, s));
adamc@623	269 kerror)
adamc@623	270 \| SOME n => (L'.KRel n, loc))
adamc@623	271 \| L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623	272
adamc@621	273 fun mapKind (dom, ran, loc)=
adamc@621	274 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621	275 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621	276 (L'.KRecord ran, loc)), loc)), loc)
adamc@403	277
adamc@403	278 fun hnormKind (kAll as (k, _)) =
adamc@403	279 case k of
adam@1639	280 L'.KUnif (_, _, ref (L'.KKnown k)) => hnormKind k
adamc@403	281 \| _ => kAll
adamc@403	282
adamc@623	283 open ElabOps
adamc@623	284
adam@1639	285 fun elabConHead env (c as (_, loc)) k =
adamc@623	286 let
adamc@623	287 fun unravel (k, c) =
adamc@623	288 case hnormKind k of
adamc@623	289 (L'.KFun (x, k'), _) =>
adamc@623	290 let
adam@1639	291 val u = kunif env loc
adamc@623	292
adamc@623	293 val k'' = subKindInKind (0, u) k'
adamc@623	294 in
adamc@623	295 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623	296 end
adamc@623	297 \| _ => (c, k)
adamc@623	298 in
adamc@623	299 unravel (k, c)
adamc@623	300 end
adamc@623	301
adamc@403	302 fun elabCon (env, denv) (c, loc) =
adamc@403	303 case c of
adamc@403	304 L.CAnnot (c, k) =>
adamc@403	305 let
adamc@623	306 val k' = elabKind env k
adamc@403	307 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	308 in
adamc@403	309 checkKind env c' ck k';
adamc@403	310 (c', k', gs)
adamc@403	311 end
adamc@403	312
adamc@403	313 \| L.TFun (t1, t2) =>
adamc@403	314 let
adamc@403	315 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403	316 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403	317 in
adamc@403	318 checkKind env t1' k1 ktype;
adamc@403	319 checkKind env t2' k2 ktype;
adamc@403	320 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403	321 end
adamc@403	322 \| L.TCFun (e, x, k, t) =>
adamc@403	323 let
adamc@403	324 val e' = elabExplicitness e
adamc@623	325 val k' = elabKind env k
adamc@403	326 val env' = E.pushCRel env x k'
adamc@403	327 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	328 in
adamc@403	329 checkKind env t' tk ktype;
adamc@403	330 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403	331 end
adamc@623	332 \| L.TKFun (x, t) =>
adamc@623	333 let
adamc@623	334 val env' = E.pushKRel env x
adamc@623	335 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	336 in
adamc@623	337 checkKind env t' tk ktype;
adamc@623	338 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623	339 end
adamc@628	340 \| L.TDisjoint (c1, c2, c) =>
adamc@403	341 let
adamc@403	342 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	343 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403	344
adam@1639	345 val ku1 = kunif env loc
adam@1639	346 val ku2 = kunif env loc
adamc@403	347
adamc@628	348 val denv' = D.assert env denv (c1', c2')
adamc@403	349 val (c', k, gs4) = elabCon (env, denv') c
adamc@403	350 in
adamc@403	351 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403	352 checkKind env c2' k2 (L'.KRecord ku2, loc);
adam@1351	353 checkKind env c' k (L'.KType, loc);
adamc@403	354
adamc@628	355 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403	356 end
adamc@403	357 \| L.TRecord c =>
adamc@403	358 let
adamc@403	359 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	360 val k = (L'.KRecord ktype, loc)
adamc@403	361 in
adamc@403	362 checkKind env c' ck k;
adamc@403	363 ((L'.TRecord c', loc), ktype, gs)
adamc@403	364 end
adamc@403	365
adamc@403	366 \| L.CVar ([], s) =>
adamc@403	367 (case E.lookupC env s of
adamc@403	368 E.NotBound =>
adamc@403	369 (conError env (UnboundCon (loc, s));
adamc@403	370 (cerror, kerror, []))
adamc@403	371 \| E.Rel (n, k) =>
adamc@623	372 let
adam@1639	373 val (c, k) = elabConHead env (L'.CRel n, loc) k
adamc@623	374 in
adamc@623	375 (c, k, [])
adamc@623	376 end
adamc@403	377 \| E.Named (n, k) =>
adamc@623	378 let
adam@1639	379 val (c, k) = elabConHead env (L'.CNamed n, loc) k
adamc@623	380 in
adamc@623	381 (c, k, [])
adamc@623	382 end)
adamc@403	383 \| L.CVar (m1 :: ms, s) =>
adamc@403	384 (case E.lookupStr env m1 of
adamc@403	385 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403	386 (cerror, kerror, []))
adamc@403	387 \| SOME (n, sgn) =>
adamc@403	388 let
adamc@403	389 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	390 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	391 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403	392 (strerror, sgnerror))
adamc@403	393 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	394 ((L'.StrVar n, loc), sgn) ms
adamc@403	395
adamc@403	396 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403	397 NONE => (conError env (UnboundCon (loc, s));
adamc@403	398 kerror)
adamc@403	399 \| SOME (k, _) => k
adam@1639	400 val (c, k) = elabConHead env (L'.CModProj (n, ms, s), loc) k
adamc@403	401 in
adamc@987	402 (c, k, [])
adamc@403	403 end)
adamc@403	404
adamc@403	405 \| L.CApp (c1, c2) =>
adamc@403	406 let
adamc@403	407 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	408 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639	409 val dom = kunif env loc
adam@1639	410 val ran = kunif env loc
adamc@403	411 in
adamc@403	412 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403	413 checkKind env c2' k2 dom;
adamc@403	414 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403	415 end
adamc@403	416 \| L.CAbs (x, ko, t) =>
adamc@403	417 let
adamc@403	418 val k' = case ko of
adam@1639	419 NONE => kunif env loc
adamc@623	420 \| SOME k => elabKind env k
adamc@403	421 val env' = E.pushCRel env x k'
adamc@403	422 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	423 in
adamc@403	424 ((L'.CAbs (x, k', t'), loc),
adamc@403	425 (L'.KArrow (k', tk), loc),
adamc@403	426 gs)
adamc@403	427 end
adamc@623	428 \| L.CKAbs (x, t) =>
adamc@623	429 let
adamc@623	430 val env' = E.pushKRel env x
adamc@623	431 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	432 in
adamc@623	433 ((L'.CKAbs (x, t'), loc),
adamc@623	434 (L'.KFun (x, tk), loc),
adamc@623	435 gs)
adamc@623	436 end
adamc@403	437
adamc@403	438 \| L.CName s =>
adamc@403	439 ((L'.CName s, loc), kname, [])
adamc@403	440
adamc@403	441 \| L.CRecord xcs =>
adamc@403	442 let
adam@1639	443 val k = kunif env loc
adamc@403	444
adamc@403	445 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403	446 let
adamc@403	447 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403	448 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403	449 in
adamc@403	450 checkKind env x' xk kname;
adamc@403	451 checkKind env c' ck k;
adamc@403	452 ((x', c'), gs1 @ gs2 @ gs)
adamc@403	453 end) [] xcs
adamc@403	454
adamc@403	455 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403	456 (* Add duplicate field checking later. *)
adamc@403	457
adamc@403	458 fun prove (xcs, ds) =
adamc@403	459 case xcs of
adamc@403	460 [] => ds
adamc@403	461 \| xc :: rest =>
adamc@403	462 let
adamc@403	463 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403	464 val ds = foldl (fn (xc', ds) =>
adamc@403	465 let
adamc@403	466 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403	467 in
adamc@403	468 D.prove env denv (r1, r2, loc) @ ds
adamc@403	469 end)
adamc@403	470 ds rest
adamc@403	471 in
adamc@403	472 prove (rest, ds)
adamc@403	473 end
adamc@403	474 in
adamc@403	475 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403	476 end
adamc@403	477 \| L.CConcat (c1, c2) =>
adamc@403	478 let
adamc@403	479 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	480 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639	481 val ku = kunif env loc
adamc@403	482 val k = (L'.KRecord ku, loc)
adamc@403	483 in
adamc@403	484 checkKind env c1' k1 k;
adamc@403	485 checkKind env c2' k2 k;
adamc@403	486 ((L'.CConcat (c1', c2'), loc), k,
adamc@403	487 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403	488 end
adamc@621	489 \| L.CMap =>
adamc@403	490 let
adam@1639	491 val dom = kunif env loc
adam@1639	492 val ran = kunif env loc
adamc@403	493 in
adamc@621	494 ((L'.CMap (dom, ran), loc),
adamc@621	495 mapKind (dom, ran, loc),
adamc@403	496 [])
adamc@403	497 end
adamc@403	498
adamc@403	499 \| L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403	500
adamc@403	501 \| L.CTuple cs =>
adamc@403	502 let
adamc@403	503 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403	504 let
adamc@403	505 val (c', k, gs') = elabCon (env, denv) c
adamc@403	506 in
adamc@403	507 (c' :: cs', k :: ks, gs' @ gs)
adamc@403	508 end) ([], [], []) cs
adamc@403	509 in
adamc@403	510 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403	511 end
adamc@403	512 \| L.CProj (c, n) =>
adamc@403	513 let
adamc@403	514 val (c', k, gs) = elabCon (env, denv) c
adam@1302	515
adam@1639	516 val k' = kunif env loc
adamc@403	517 in
adam@1302	518 if n <= 0 then
adam@1302	519 (conError env (ProjBounds (c', n));
adam@1302	520 (cerror, kerror, []))
adam@1302	521 else
adam@1639	522 (checkKind env c' k (L'.KTupleUnif (loc, [(n, k')], ref (L'.KUnknown (validateKind env))), loc);
adam@1302	523 ((L'.CProj (c', n), loc), k', gs))
adamc@403	524 end
adamc@403	525
adamc@403	526 \| L.CWild k =>
adamc@403	527 let
adamc@623	528 val k' = elabKind env k
adamc@403	529 in
adam@1639	530 (cunif env (loc, k'), k', [])
adamc@403	531 end
adamc@403	532
adamc@403	533 fun kunifsRemain k =
adamc@403	534 case k of
adam@1639	535 L'.KUnif (_, _, ref (L'.KUnknown _)) => true
adam@1639	536 \| L'.KTupleUnif (_, _, ref (L'.KUnknown _)) => true
adamc@403	537 \| _ => false
adamc@403	538 fun cunifsRemain c =
adamc@403	539 case c of
adam@1639	540 L'.CUnif (_, loc, k, _, r as ref (L'.Unknown _)) =>
adam@1326	541 (case #1 (hnormKind k) of
adam@1639	542 L'.KUnit => (r := L'.Known (L'.CUnit, loc); false)
adam@1584	543 \| _ => true)
adam@1584	544 \| _ => false
adamc@403	545
adamc@403	546 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403	547 con = fn _ => false,
adamc@403	548 exp = fn _ => false,
adamc@403	549 sgn_item = fn _ => false,
adamc@403	550 sgn = fn _ => false,
adamc@403	551 str = fn _ => false,
adamc@403	552 decl = fn _ => false}
adamc@403	553
adam@1584	554 val cunifsInDecl = U.Decl.exists {kind = fn _ => false,
adamc@403	555 con = cunifsRemain,
adam@1584	556 exp = fn _ => false,
adam@1584	557 sgn_item = fn _ => false,
adam@1584	558 sgn = fn _ => false,
adam@1584	559 str = fn _ => false,
adam@1584	560 decl = fn _ => false}
adamc@403	561
adamc@403	562 fun occursCon r =
adamc@403	563 U.Con.exists {kind = fn _ => false,
adam@1303	564 con = fn L'.CUnif (_, _, _, _, r') => r = r'
adamc@403	565 \| _ => false}
adamc@403	566
adamc@403	567 exception CUnify' of cunify_error
adamc@403	568
adamc@403	569 type record_summary = {
adamc@403	570 fields : (L'.con * L'.con) list,
adam@1639	571 unifs : (L'.con * L'.cunif ref) list,
adamc@403	572 others : L'.con list
adamc@403	573 }
adamc@403	574
adamc@403	575 fun summaryToCon {fields, unifs, others} =
adamc@403	576 let
adam@1626	577 fun concat (c1, c2) =
adam@1626	578 case #1 c1 of
adam@1626	579 L'.CRecord (_, []) => c2
adam@1626	580 \| _ => case #1 c2 of
adam@1626	581 L'.CRecord (_, []) => c1
adam@1626	582 \| _ => (L'.CConcat (c1, c2), dummy)
adam@1626	583
adamc@403	584 val c = (L'.CRecord (ktype, []), dummy)
adam@1626	585 val c = List.foldr concat c others
adam@1626	586 val c = List.foldr (fn ((c', _), c) => concat (c', c)) c unifs
adamc@403	587 in
adam@1626	588 concat ((L'.CRecord (ktype, fields), dummy), c)
adamc@403	589 end
adamc@403	590
adamc@403	591 fun p_summary env s = p_con env (summaryToCon s)
adamc@403	592
adamc@403	593 exception CUnify of L'.con * L'.con * cunify_error
adamc@403	594
adamc@403	595 fun kindof env (c, loc) =
adamc@403	596 case c of
adamc@403	597 L'.TFun _ => ktype
adamc@403	598 \| L'.TCFun _ => ktype
adamc@403	599 \| L'.TRecord _ => ktype
adamc@628	600 \| L'.TDisjoint _ => ktype
adamc@403	601
adamc@403	602 \| L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403	603 \| L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403	604 \| L'.CModProj (n, ms, x) =>
adamc@403	605 let
adamc@403	606 val (_, sgn) = E.lookupStrNamed env n
adamc@403	607 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	608 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	609 NONE => raise Fail "kindof: Unknown substructure"
adamc@403	610 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	611 ((L'.StrVar n, loc), sgn) ms
adamc@403	612 in
adamc@403	613 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403	614 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403	615 \| SOME (k, _) => k
adamc@403	616 end
adamc@403	617
adamc@403	618 \| L'.CApp (c, _) =>
adamc@403	619 (case hnormKind (kindof env c) of
adamc@403	620 (L'.KArrow (_, k), _) => k
adamc@403	621 \| (L'.KError, _) => kerror
adamc@413	622 \| k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403	623 \| L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628	624
adamc@403	625
adamc@403	626 \| L'.CName _ => kname
adamc@403	627
adamc@403	628 \| L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403	629 \| L'.CConcat (c, _) => kindof env c
adamc@621	630 \| L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403	631
adamc@403	632 \| L'.CUnit => (L'.KUnit, loc)
adamc@403	633
adamc@403	634 \| L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403	635 \| L'.CProj (c, n) =>
adamc@403	636 (case hnormKind (kindof env c) of
adamc@403	637 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adam@1311	638 \| (L'.KUnif (_, _, r), _) =>
adam@1311	639 let
adam@1639	640 val ku = kunif env loc
adam@1639	641 val k = (L'.KTupleUnif (loc, [(n, ku)], r), loc)
adam@1311	642 in
adam@1639	643 r := L'.KKnown k;
adam@1311	644 k
adam@1311	645 end
adam@1311	646 \| (L'.KTupleUnif (_, nks, r), _) =>
adam@1311	647 (case ListUtil.search (fn (n', k) => if n' = n then SOME k else NONE) nks of
adam@1311	648 SOME k => k
adam@1311	649 \| NONE =>
adam@1311	650 let
adam@1639	651 val ku = kunif env loc
adam@1639	652 val k = (L'.KTupleUnif (loc, ((n, ku) :: nks), r), loc)
adam@1311	653 in
adam@1639	654 r := L'.KKnown k;
adam@1311	655 k
adam@1311	656 end)
adamc@413	657 \| k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403	658
adamc@403	659 \| L'.CError => kerror
adam@1303	660 \| L'.CUnif (_, _, k, _, _) => k
adamc@403	661
adamc@623	662 \| L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623	663 \| L'.CKApp (c, k) =>
adamc@623	664 (case hnormKind (kindof env c) of
adamc@623	665 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623	666 \| k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623	667 \| L'.TKFun _ => ktype
adamc@403	668
adamc@621	669 exception GuessFailure
adamc@403	670
adamc@513	671 fun isUnitCon env (c, loc) =
adamc@513	672 case c of
adamc@513	673 L'.TFun _ => false
adamc@513	674 \| L'.TCFun _ => false
adamc@513	675 \| L'.TRecord _ => false
adamc@628	676 \| L'.TDisjoint _ => false
adamc@513	677
adam@1316	678 \| L'.CRel xn => #1 (hnormKind (#2 (E.lookupCRel env xn))) = L'.KUnit
adam@1316	679 \| L'.CNamed xn => #1 (hnormKind (#2 (E.lookupCNamed env xn))) = L'.KUnit
adamc@518	680 \| L'.CModProj (n, ms, x) => false
adamc@518	681 (*let
adamc@513	682 val (_, sgn) = E.lookupStrNamed env n
adamc@513	683 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513	684 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513	685 NONE => raise Fail "kindof: Unknown substructure"
adamc@513	686 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513	687 ((L'.StrVar n, loc), sgn) ms
adamc@513	688 in
adamc@513	689 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513	690 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513	691 \| SOME ((k, _), _) => k = L'.KUnit
adamc@518	692 end*)
adamc@518	693
adamc@518	694 \| L'.CApp (c, _) => false
adamc@518	695 (*(case hnormKind (kindof env c) of
adamc@513	696 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513	697 \| (L'.KError, _) => false
adamc@518	698 \| k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513	699 \| L'.CAbs _ => false
adamc@513	700
adamc@513	701 \| L'.CName _ => false
adamc@513	702
adamc@513	703 \| L'.CRecord _ => false
adamc@513	704 \| L'.CConcat _ => false
adamc@621	705 \| L'.CMap _ => false
adamc@513	706
adamc@513	707 \| L'.CUnit => true
adamc@513	708
adamc@513	709 \| L'.CTuple _ => false
adamc@518	710 \| L'.CProj (c, n) => false
adamc@518	711 (*(case hnormKind (kindof env c) of
adamc@513	712 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518	713 \| k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513	714
adamc@513	715 \| L'.CError => false
adam@1316	716 \| L'.CUnif (_, _, k, _, _) => #1 (hnormKind k) = L'.KUnit
adamc@513	717
adamc@623	718 \| L'.CKAbs _ => false
adamc@623	719 \| L'.CKApp _ => false
adamc@623	720 \| L'.TKFun _ => false
adamc@623	721
adamc@709	722 val recdCounter = ref 0
adamc@709	723
adamc@713	724 val mayDelay = ref false
adamc@777	725 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777	726
adamc@830	727 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830	728
adam@1304	729 exception CantSquish
adam@1304	730
adam@1304	731 fun squish by =
adam@1304	732 U.Con.mapB {kind = fn _ => fn k => k,
adam@1304	733 con = fn bound => fn c =>
adam@1304	734 case c of
adam@1304	735 L'.CRel xn =>
adam@1304	736 if xn < bound then
adam@1304	737 c
adam@1304	738 else if bound <= xn andalso xn < bound + by then
adam@1304	739 raise CantSquish
adam@1304	740 else
adam@1304	741 L'.CRel (xn - by)
adam@1304	742 \| L'.CUnif _ => raise CantSquish
adam@1304	743 \| _ => c,
adam@1304	744 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1304	745 \| (bound, _) => bound} 0
adam@1304	746
adam@1582	747 val reducedSummaries = ref (NONE : (Print.PD.pp_desc * Print.PD.pp_desc) option)
adam@1582	748
adamc@777	749 fun unifyRecordCons env (loc, c1, c2) =
adamc@403	750 let
adamc@403	751 fun rkindof c =
adamc@403	752 case hnormKind (kindof env c) of
adamc@403	753 (L'.KRecord k, _) => k
adamc@403	754 \| (L'.KError, _) => kerror
adam@1639	755 \| (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@753	756 let
adam@1639	757 val k = kunif' f (#2 c)
adamc@753	758 in
adam@1639	759 r := L'.KKnown (L'.KRecord k, #2 c);
adamc@753	760 k
adamc@753	761 end
adamc@413	762 \| k => raise CUnify' (CKindof (k, c, "record"))
adamc@403	763
adamc@403	764 val k1 = rkindof c1
adamc@403	765 val k2 = rkindof c2
adamc@403	766
adamc@628	767 val r1 = recordSummary env c1
adamc@628	768 val r2 = recordSummary env c2
adamc@403	769 in
adamc@623	770 unifyKinds env k1 k2;
adamc@777	771 unifySummaries env (loc, k1, r1, r2)
adamc@403	772 end
adamc@403	773
adamc@777	774 and normalizeRecordSummary env (r : record_summary) =
adamc@777	775 recordSummary env (summaryToCon r)
adamc@777	776
adamc@628	777 and recordSummary env c =
adamc@403	778 let
adamc@628	779 val c = hnormCon env c
adamc@628	780
adamc@628	781 val sum =
adamc@403	782 case c of
adamc@628	783 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403	784 \| (L'.CConcat (c1, c2), _) =>
adamc@403	785 let
adamc@628	786 val s1 = recordSummary env c1
adamc@628	787 val s2 = recordSummary env c2
adamc@403	788 in
adamc@628	789 {fields = #fields s1 @ #fields s2,
adamc@628	790 unifs = #unifs s1 @ #unifs s2,
adamc@628	791 others = #others s1 @ #others s2}
adamc@403	792 end
adam@1639	793 \| (L'.CUnif (nl, _, _, _, ref (L'.Known c)), _) => recordSummary env (E.mliftConInCon nl c)
adam@1303	794 \| c' as (L'.CUnif (0, _, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628	795 \| c' => {fields = [], unifs = [], others = [c']}
adamc@403	796 in
adamc@628	797 sum
adamc@403	798 end
adamc@403	799
adamc@987	800 and consEq env loc (c1, c2) =
adamc@777	801 let
adamc@777	802 val mayDelay' = !mayDelay
adamc@777	803 in
adamc@777	804 (mayDelay := false;
adamc@987	805 unifyCons env loc c1 c2;
adamc@777	806 mayDelay := mayDelay';
adamc@777	807 true)
adamc@777	808 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777	809 end
adamc@403	810
adamc@403	811 and consNeq env (c1, c2) =
adamc@628	812 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403	813 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093	814 \| (L'.CName _, L'.CRel _) => true
adamc@1093	815 \| (L'.CRel _, L'.CName _) => true
adamc@1093	816 \| (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093	817 \| (L'.CRel _, L'.CNamed _) => true
adamc@1093	818 \| (L'.CNamed _, L'.CRel _) => true
adamc@1093	819 \| (L'.CRel _, L'.CModProj _) => true
adamc@1093	820 \| (L'.CModProj _, L'.CRel _) => true
adamc@1269	821 \| (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adam@1589	822 \| (L'.CModProj _, L'.CName _) => true
adam@1589	823 \| (L'.CName _, L'.CModProj _) => true
adam@1589	824 \| (L'.CNamed _, L'.CName _) => true
adam@1589	825 \| (L'.CName _, L'.CNamed _) => true
adamc@403	826 \| _ => false
adamc@403	827
adamc@777	828 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403	829 let
adam@1583	830 val () = reducedSummaries := NONE
adam@1583	831
adamc@848	832 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1303	833 ("#1", p_summary env s1),
adam@1303	834 ("#2", p_summary env s2)]*)
adamc@403	835
adamc@403	836 fun eatMatching p (ls1, ls2) =
adamc@403	837 let
adamc@403	838 fun em (ls1, ls2, passed1) =
adamc@403	839 case ls1 of
adamc@403	840 [] => (rev passed1, ls2)
adamc@403	841 \| h1 :: t1 =>
adamc@403	842 let
adamc@403	843 fun search (ls2', passed2) =
adamc@403	844 case ls2' of
adamc@403	845 [] => em (t1, ls2, h1 :: passed1)
adamc@403	846 \| h2 :: t2 =>
adamc@403	847 if p (h1, h2) then
adamc@403	848 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403	849 else
adamc@403	850 search (t2, h2 :: passed2)
adamc@403	851 in
adamc@403	852 search (ls2, [])
adamc@403	853 end
adamc@403	854 in
adamc@403	855 em (ls1, ls2, [])
adamc@403	856 end
adamc@403	857
adamc@403	858 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403	859 not (consNeq env (x1, x2))
adamc@987	860 andalso consEq env loc (c1, c2)
adamc@987	861 andalso consEq env loc (x1, x2))
adamc@403	862 (#fields s1, #fields s2)
adamc@403	863 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403	864 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646	865
adamc@403	866 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646	867
adam@1660	868 val hasUnifs = U.Con.exists {kind = fn _ => false,
adam@1660	869 con = fn L'.CUnif _ => true
adam@1660	870 \| _ => false}
adam@1657	871
adam@1657	872 val (others1, others2) = eatMatching (fn (c1, c2) =>
adam@1660	873 not (hasUnifs c1 andalso hasUnifs c2)
adam@1657	874 andalso consEq env loc (c1, c2)) (#others s1, #others s2)
adamc@403	875 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403	876 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	877
adamc@709	878 fun unsummarize {fields, unifs, others} =
adamc@709	879 let
adamc@709	880 val c = (L'.CRecord (k, fields), loc)
adamc@709	881
adamc@709	882 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709	883 c unifs
adamc@709	884 in
adamc@709	885 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709	886 c others
adamc@709	887 end
adamc@709	888
adamc@710	889 val empties = ([], [], [], [], [], [])
adamc@710	890
adamc@709	891 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709	892 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adam@1639	893 orig as ([(_, r as ref (L'.Unknown f))], [], [], _, _, _) =>
adamc@709	894 let
adamc@709	895 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709	896 in
adam@1639	897 if occursCon r c orelse not (f c) then
adamc@709	898 orig
adamc@709	899 else
adam@1639	900 (r := L'.Known c;
adamc@710	901 empties)
adamc@709	902 end
adam@1639	903 \| orig as (_, _, _, [(_, r as ref (L'.Unknown f))], [], []) =>
adamc@709	904 let
adamc@709	905 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709	906 in
adam@1639	907 if occursCon r c orelse not (f c) then
adamc@709	908 orig
adamc@709	909 else
adam@1639	910 (r := L'.Known c;
adamc@710	911 empties)
adamc@709	912 end
adam@1639	913 \| orig as ([(_, r1 as ref (L'.Unknown f1))], _, [], [(_, r2 as ref (L'.Unknown f2))], _, []) =>
adamc@710	914 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710	915 let
adamc@838	916 val kr = (L'.KRecord k, loc)
adam@1639	917 val u = cunif env (loc, kr)
adam@1639	918
adam@1639	919 val c1 = (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc)
adam@1639	920 val c2 = (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc)
adamc@710	921 in
adam@1639	922 if not (f1 c1) orelse not (f2 c2) then
adam@1639	923 orig
adam@1639	924 else
adam@1639	925 (r1 := L'.Known c1;
adam@1639	926 r2 := L'.Known c2;
adam@1639	927 empties)
adamc@710	928 end
adamc@710	929 else
adamc@710	930 orig
adamc@709	931 \| orig => orig
adamc@709	932
adamc@403	933 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777	934 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	935
adamc@753	936 fun isGuessable (other, fs, unifs) =
adamc@753	937 let
adamc@753	938 val c = (L'.CRecord (k, fs), loc)
adamc@753	939 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753	940 in
adamc@987	941 (guessMap env loc (other, c, GuessFailure);
adamc@753	942 true)
adamc@753	943 handle GuessFailure => false
adamc@753	944 end
adamc@403	945
adamc@754	946 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753	947 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753	948 ([], _, [other1], [], [], _) =>
adamc@753	949 if isGuessable (other1, fs2, unifs2) then
adamc@754	950 ([], [], [], [], [], [])
adamc@403	951 else
adamc@754	952 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753	953 \| (_, [], [], [other2], _, []) =>
adamc@777	954 if isGuessable (other2, fs1, unifs1) then
adamc@777	955 ([], [], [], [], [], [])
adamc@777	956 else
adamc@777	957 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754	958 \| _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403	959
adam@1582	960 val () = if !mayDelay then
adam@1582	961 ()
adam@1582	962 else
adam@1626	963 let
adam@1626	964 val c1 = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1626	965 val c2 = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1626	966 in
adam@1626	967 case (c1, c2) of
adam@1626	968 ((L'.CRecord (_, []), _), (L'.CRecord (_, []), _)) => reducedSummaries := NONE
adam@1626	969 \| _ => reducedSummaries := SOME (p_con env c1, p_con env c2)
adam@1626	970 end
adam@1582	971
adamc@403	972 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646	973 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	974
adamc@838	975 val empty = (L'.CRecord (k, []), loc)
adamc@1071	976 fun failure () =
adamc@1071	977 let
adamc@1071	978 val fs2 = #fields s2
adamc@1071	979
adamc@1071	980 fun findPointwise fs1 =
adamc@1071	981 case fs1 of
adamc@1071	982 [] => NONE
adamc@1071	983 \| (nm1, c1) :: fs1 =>
adamc@1071	984 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071	985 NONE => findPointwise fs1
adamc@1071	986 \| SOME (_, c2) =>
adamc@1071	987 if consEq env loc (c1, c2) then
adamc@1071	988 findPointwise fs1
adamc@1071	989 else
adam@1588	990 SOME (nm1, c1, c2, (unifyCons env loc c1 c2; NONE)
adam@1588	991 handle CUnify (_, _, err) => (reducedSummaries := NONE;
adam@1588	992 SOME err))
adamc@1071	993 in
adamc@1071	994 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071	995 end
adam@1341	996
adam@1341	997 fun default () = if !mayDelay then
adam@1341	998 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adam@1341	999 else
adam@1341	1000 failure ()
adamc@709	1001 in
adamc@777	1002 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777	1003 (_, [], [], [], [], []) =>
adam@1639	1004 app (fn (_, r) => r := L'.Known empty) unifs1
adamc@777	1005 \| ([], [], [], _, [], []) =>
adam@1639	1006 app (fn (_, r) => r := L'.Known empty) unifs2
adam@1639	1007 \| (_, _, _, [], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)]) =>
adam@1341	1008 let
adam@1341	1009 val c = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1341	1010 in
adam@1341	1011 if occursCon r c then
adam@1588	1012 (reducedSummaries := NONE;
adam@1588	1013 raise CUnify' (COccursCheckFailed (cr, c)))
adam@1341	1014 else
adam@1639	1015 let
adam@1639	1016 val sq = squish nl c
adam@1639	1017 in
adam@1639	1018 if not (f sq) then
adam@1639	1019 default ()
adam@1639	1020 else
adam@1639	1021 r := L'.Known sq
adam@1639	1022 end
adam@1341	1023 handle CantSquish => default ()
adam@1341	1024 end
adam@1639	1025 \| ([], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)], _, _, _) =>
adam@1341	1026 let
adam@1341	1027 val c = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1341	1028 in
adam@1341	1029 if occursCon r c then
adam@1588	1030 (reducedSummaries := NONE;
adam@1588	1031 raise CUnify' (COccursCheckFailed (cr, c)))
adam@1341	1032 else
adam@1639	1033 let
adam@1639	1034 val sq = squish nl c
adam@1639	1035 in
adam@1639	1036 if not (f sq) then
adam@1639	1037 default ()
adam@1639	1038 else
adam@1639	1039 r := L'.Known sq
adam@1639	1040 end
adam@1341	1041 handle CantSquish => default ()
adam@1341	1042 end
adam@1341	1043 \| _ => default ())
adam@1341	1044
adamc@777	1045 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777	1046 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403	1047 end
adamc@403	1048
adamc@987	1049 and guessMap env loc (c1, c2, ex) =
adamc@403	1050 let
adamc@621	1051 fun unfold (dom, ran, f, r, c) =
adamc@403	1052 let
adamc@621	1053 fun unfold (r, c) =
adamc@754	1054 case #1 (hnormCon env c) of
adamc@987	1055 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628	1056 \| L'.CRecord (_, [(x, v)]) =>
adamc@628	1057 let
adamc@628	1058 val v' = case dom of
adamc@628	1059 (L'.KUnit, _) => (L'.CUnit, loc)
adam@1639	1060 \| _ => cunif env (loc, dom)
adamc@628	1061 in
adamc@987	1062 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987	1063 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628	1064 end
adamc@628	1065 \| L'.CRecord (_, (x, v) :: rest) =>
adamc@628	1066 let
adam@1639	1067 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639	1068 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628	1069 in
adamc@628	1070 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628	1071 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987	1072 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	1073 end
adamc@628	1074 \| L'.CConcat (c1', c2') =>
adamc@628	1075 let
adam@1639	1076 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639	1077 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628	1078 in
adamc@628	1079 unfold (r1, c1');
adamc@628	1080 unfold (r2, c2');
adamc@987	1081 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	1082 end
adam@1639	1083 \| L'.CUnif (0, _, _, _, ur as ref (L'.Unknown rf)) =>
adam@1639	1084 let
adam@1639	1085 val c' = (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adam@1639	1086 in
adam@1639	1087 if not (rf c') then
adam@1639	1088 cunifyError env (CScope (c, c'))
adam@1639	1089 else
adam@1639	1090 ur := L'.Known c'
adam@1639	1091 end
adamc@628	1092 \| _ => raise ex
adamc@403	1093 in
adamc@621	1094 unfold (r, c)
adamc@403	1095 end
adamc@632	1096 handle _ => raise ex
adamc@403	1097 in
adamc@403	1098 case (#1 c1, #1 c2) of
adamc@621	1099 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621	1100 unfold (dom, ran, f, r, c2)
adamc@621	1101 \| (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621	1102 unfold (dom, ran, f, r, c1)
adamc@403	1103 \| _ => raise ex
adamc@403	1104 end
adamc@403	1105
adamc@987	1106 and unifyCons' env loc c1 c2 =
adamc@628	1107 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628	1108 ()
adamc@628	1109 else
adamc@403	1110 let
adamc@628	1111 (*val befor = Time.now ()
adamc@628	1112 val old1 = c1
adamc@628	1113 val old2 = c2*)
adamc@628	1114 val c1 = hnormCon env c1
adamc@628	1115 val c2 = hnormCon env c2
adamc@403	1116 in
adamc@987	1117 unifyCons'' env loc c1 c2
adamc@987	1118 handle ex => guessMap env loc (c1, c2, ex)
adamc@403	1119 end
adamc@628	1120
adamc@987	1121 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403	1122 let
adamc@403	1123 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403	1124
adamc@706	1125 fun projSpecial1 (c1, n1, onFail) =
adamc@403	1126 let
adamc@632	1127 fun trySnd () =
adamc@632	1128 case #1 (hnormCon env c2All) of
adamc@632	1129 L'.CProj (c2, n2) =>
adamc@632	1130 let
adamc@632	1131 fun tryNormal () =
adamc@632	1132 if n1 = n2 then
adamc@987	1133 unifyCons' env loc c1 c2
adamc@632	1134 else
adamc@706	1135 onFail ()
adamc@632	1136 in
adamc@632	1137 case #1 (hnormCon env c2) of
adam@1639	1138 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632	1139 (case #1 (hnormKind k) of
adamc@632	1140 L'.KTuple ks =>
adamc@632	1141 let
adamc@632	1142 val loc = #2 c2
adam@1639	1143 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632	1144 in
adam@1639	1145 r := L'.Known (L'.CTuple us, loc);
adamc@987	1146 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632	1147 end
adamc@632	1148 \| _ => tryNormal ())
adamc@632	1149 \| _ => tryNormal ()
adamc@632	1150 end
adamc@706	1151 \| _ => onFail ()
adamc@403	1152 in
adamc@632	1153 case #1 (hnormCon env c1) of
adam@1639	1154 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632	1155 (case #1 (hnormKind k) of
adamc@632	1156 L'.KTuple ks =>
adamc@632	1157 let
adamc@632	1158 val loc = #2 c1
adam@1639	1159 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632	1160 in
adam@1639	1161 r := L'.Known (L'.CTuple us, loc);
adamc@987	1162 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632	1163 end
adamc@632	1164 \| _ => trySnd ())
adamc@632	1165 \| _ => trySnd ()
adamc@403	1166 end
adamc@632	1167
adamc@706	1168 fun projSpecial2 (c2, n2, onFail) =
adamc@706	1169 case #1 (hnormCon env c2) of
adam@1639	1170 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@706	1171 (case #1 (hnormKind k) of
adamc@706	1172 L'.KTuple ks =>
adamc@706	1173 let
adamc@706	1174 val loc = #2 c2
adam@1639	1175 val us = map (fn k => cunif' f (loc, k)) ks
adamc@706	1176 in
adam@1639	1177 r := L'.Known (L'.CTuple us, loc);
adamc@987	1178 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706	1179 end
adamc@706	1180 \| _ => onFail ())
adamc@706	1181 \| _ => onFail ()
adamc@706	1182
adamc@777	1183 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706	1184
adamc@706	1185 fun isRecord () =
adamc@706	1186 case (c1, c2) of
adamc@706	1187 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706	1188 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706	1189 \| _ => isRecord' ()
adamc@706	1190 in
adam@1668	1191 (*eprefaces "unifyCons''" [("c1", p_con env c1All),
adam@1668	1192 ("c2", p_con env c2All)];*)
adam@1668	1193
adam@1668	1194 (case (c1, c2) of
adamc@706	1195 (L'.CError, _) => ()
adamc@706	1196 \| (_, L'.CError) => ()
adamc@403	1197
adam@1639	1198 \| (L'.CUnif (nl1, loc1, k1, _, r1 as ref (L'.Unknown f1)), L'.CUnif (nl2, loc2, k2, _, r2 as ref (L'.Unknown f2))) =>
adam@1668	1199 if r1 = r2 then
adam@1668	1200 if nl1 = nl2 then
adam@1668	1201 ()
adam@1668	1202 else
adam@1668	1203 err (fn _ => TooLifty (loc1, loc2))
adam@1303	1204 else if nl1 = 0 then
adamc@705	1205 (unifyKinds env k1 k2;
adam@1639	1206 if f1 c2All then
adam@1639	1207 r1 := L'.Known c2All
adam@1639	1208 else
adam@1639	1209 err CScope)
adam@1303	1210 else if nl2 = 0 then
adam@1303	1211 (unifyKinds env k1 k2;
adam@1639	1212 if f2 c1All then
adam@1639	1213 r2 := L'.Known c1All
adam@1639	1214 else
adam@1639	1215 err CScope)
adam@1303	1216 else
adam@1303	1217 err (fn _ => TooLifty (loc1, loc2))
adam@1303	1218
adam@1639	1219 \| (L'.CUnif (0, _, _, _, r as ref (L'.Unknown f)), _) =>
adam@1639	1220 if occursCon r c2All then
adam@1639	1221 err COccursCheckFailed
adam@1639	1222 else if f c2All then
adam@1639	1223 r := L'.Known c2All
adam@1639	1224 else
adam@1639	1225 err CScope
adam@1639	1226 \| (_, L'.CUnif (0, _, _, _, r as ref (L'.Unknown f))) =>
adam@1639	1227 if occursCon r c1All then
adam@1639	1228 err COccursCheckFailed
adam@1639	1229 else if f c1All then
adam@1639	1230 r := L'.Known c1All
adam@1639	1231 else
adam@1639	1232 err CScope
adam@1639	1233
adam@1639	1234 \| (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _) =>
adamc@705	1235 if occursCon r c2All then
adamc@705	1236 err COccursCheckFailed
adamc@705	1237 else
adam@1639	1238 (let
adam@1639	1239 val sq = squish nl c2All
adam@1639	1240 in
adam@1639	1241 if f sq then
adam@1639	1242 r := L'.Known sq
adam@1639	1243 else
adam@1639	1244 err CScope
adam@1639	1245 end
adam@1639	1246 handle CantSquish => err (fn _ => TooDeep))
adam@1639	1247 \| (_, L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f))) =>
adamc@705	1248 if occursCon r c1All then
adamc@705	1249 err COccursCheckFailed
adamc@705	1250 else
adam@1639	1251 (let
adam@1639	1252 val sq = squish nl c1All
adam@1639	1253 in
adam@1639	1254 if f sq then
adam@1639	1255 r := L'.Known sq
adam@1639	1256 else
adam@1639	1257 err CScope
adam@1639	1258 end
adam@1306	1259 handle CantSquish => err (fn _ => TooDeep))
adam@1304	1260
adam@1341	1261 \| (L'.CRecord _, _) => isRecord ()
adam@1341	1262 \| (_, L'.CRecord _) => isRecord ()
adam@1341	1263 \| (L'.CConcat _, _) => isRecord ()
adam@1341	1264 \| (_, L'.CConcat _) => isRecord ()
adam@1341	1265
adam@1341	1266
adamc@705	1267 \| (L'.CUnit, L'.CUnit) => ()
adamc@705	1268
adamc@705	1269 \| (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987	1270 (unifyCons' env loc d1 d2;
adam@1639	1271 unifyCons' env loc r1 r2)
adamc@705	1272 \| (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705	1273 if expl1 <> expl2 then
adamc@705	1274 err CExplicitness
adamc@705	1275 else
adamc@705	1276 (unifyKinds env d1 d2;
adamc@705	1277 let
adamc@705	1278 (val befor = Time.now ())
adamc@705	1279 val env' = E.pushCRel env x1 d1
adamc@705	1280 in
adamc@705	1281 (*TextIO.print ("E.pushCRel: "
adamc@705	1282 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705	1283 ^ "\n");*)
adamc@987	1284 unifyCons' env' loc r1 r2
adamc@705	1285 end)
adamc@987	1286 \| (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705	1287 \| (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987	1288 (unifyCons' env loc c1 c2;
adamc@987	1289 unifyCons' env loc d1 d2;
adamc@987	1290 unifyCons' env loc e1 e2)
adamc@705	1291
adamc@705	1292 \| (L'.CRel n1, L'.CRel n2) =>
adamc@705	1293 if n1 = n2 then
adamc@705	1294 ()
adamc@705	1295 else
adamc@705	1296 err CIncompatible
adamc@705	1297 \| (L'.CNamed n1, L'.CNamed n2) =>
adamc@705	1298 if n1 = n2 then
adamc@705	1299 ()
adamc@705	1300 else
adamc@705	1301 err CIncompatible
adamc@705	1302
adamc@705	1303 \| (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987	1304 (unifyCons' env loc d1 d2;
adamc@987	1305 unifyCons' env loc r1 r2)
adamc@705	1306 \| (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705	1307 (unifyKinds env k1 k2;
adamc@987	1308 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705	1309
adamc@705	1310 \| (L'.CName n1, L'.CName n2) =>
adamc@705	1311 if n1 = n2 then
adamc@705	1312 ()
adamc@705	1313 else
adamc@705	1314 err CIncompatible
adamc@705	1315
adamc@705	1316 \| (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705	1317 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705	1318 ()
adamc@705	1319 else
adamc@705	1320 err CIncompatible
adamc@705	1321
adamc@705	1322 \| (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987	1323 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705	1324 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705	1325
adamc@706	1326 \| (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706	1327 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706	1328
adamc@623	1329 \| (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623	1330 (unifyKinds env dom1 dom2;
adamc@628	1331 unifyKinds env ran1 ran2)
adamc@623	1332
adamc@623	1333 \| (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987	1334 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623	1335 \| (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623	1336 (unifyKinds env k1 k2;
adamc@987	1337 unifyCons' env loc c1 c2)
adamc@623	1338 \| (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987	1339 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628	1340
adam@1668	1341 \| _ => err CIncompatible)(*;
adam@1668	1342 eprefaces "/unifyCons''" [("c1", p_con env c1All),
adam@1668	1343 ("c2", p_con env c2All)]*)
adamc@403	1344 end
adamc@403	1345
adamc@987	1346 and unifyCons env loc c1 c2 =
adamc@987	1347 unifyCons' env loc c1 c2
adamc@403	1348 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403	1349 \| KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403	1350
adamc@628	1351 fun checkCon env e c1 c2 =
adamc@987	1352 unifyCons env (#2 e) c1 c2
adamc@403	1353 handle CUnify (c1, c2, err) =>
adamc@628	1354 expError env (Unify (e, c1, c2, err))
adamc@628	1355
adamc@628	1356 fun checkPatCon env p c1 c2 =
adamc@987	1357 unifyCons env (#2 p) c1 c2
adamc@403	1358 handle CUnify (c1, c2, err) =>
adamc@628	1359 expError env (PatUnify (p, c1, c2, err))
adamc@71	1360
adamc@403	1361 fun primType env p =
adamc@403	1362 case p of
adamc@403	1363 P.Int _ => !int
adamc@403	1364 \| P.Float _ => !float
adamc@403	1365 \| P.String _ => !string
adamc@821	1366 \| P.Char _ => !char
adamc@623	1367
adamc@403	1368 datatype constraint =
adamc@403	1369 Disjoint of D.goal
adamc@403	1370 \| TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403	1371
adam@1591	1372 fun relocConstraint loc c =
adam@1591	1373 case c of
adam@1591	1374 Disjoint (_, a, b, c, d) => Disjoint (loc, a, b, c, d)
adam@1591	1375 \| TypeClass (a, b, c, _) => TypeClass (a, b, c, loc)
adam@1591	1376
adamc@403	1377 val enD = map Disjoint
adamc@403	1378
adamc@634	1379 fun isClassOrFolder env cl =
adamc@634	1380 E.isClass env cl
adamc@634	1381 orelse case hnormCon env cl of
adamc@634	1382 (L'.CKApp (cl, _), _) =>
adamc@634	1383 (case hnormCon env cl of
adamc@634	1384 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634	1385 \| _ => false)
adamc@634	1386 \| _ => false
adamc@634	1387
adam@1303	1388 fun subConInCon env x y =
adam@1303	1389 ElabOps.subConInCon x y
adam@1303	1390 handle SubUnif => (cunifyError env (TooUnify (#2 x, y));
adam@1303	1391 cerror)
adam@1303	1392
adamc@629	1393 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403	1394 let
adamc@898	1395 fun unravelKind (t, e) =
adamc@898	1396 case hnormCon env t of
adamc@898	1397 (L'.TKFun (x, t'), _) =>
adamc@898	1398 let
adam@1639	1399 val u = kunif env loc
adamc@898	1400
adamc@898	1401 val t'' = subKindInCon (0, u) t'
adamc@898	1402 in
adamc@898	1403 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898	1404 end
adamc@898	1405 \| t => (e, t, [])
adamc@898	1406
adamc@403	1407 fun unravel (t, e) =
adamc@628	1408 case hnormCon env t of
adamc@628	1409 (L'.TKFun (x, t'), _) =>
adamc@628	1410 let
adam@1639	1411 val u = kunif env loc
adamc@628	1412
adamc@628	1413 val t'' = subKindInCon (0, u) t'
adamc@628	1414 in
adamc@628	1415 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628	1416 end
adamc@628	1417 \| (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628	1418 let
adam@1639	1419 val u = cunif env (loc, k)
adamc@628	1420
adam@1303	1421 val t'' = subConInCon env (0, u) t'
adamc@628	1422 in
adamc@628	1423 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628	1424 end
adamc@633	1425 \| (L'.TFun (dom, ran), _) =>
adamc@628	1426 let
adamc@633	1427 fun default () = (e, t, [])
adamc@750	1428
adamc@750	1429 fun isInstance () =
adamc@750	1430 if infer <> L.TypesOnly then
adamc@750	1431 let
adamc@750	1432 val r = ref NONE
adamc@750	1433 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750	1434 in
adamc@750	1435 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750	1436 end
adamc@750	1437 else
adamc@750	1438 default ()
adamc@750	1439
adamc@750	1440 fun hasInstance c =
adamc@753	1441 case hnormCon env c of
adamc@753	1442 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753	1443 con = fn c =>
adamc@753	1444 E.isClass env (hnormCon env (c, loc))} c
adamc@753	1445 \| c =>
adamc@750	1446 let
adamc@753	1447 fun findHead c =
adamc@753	1448 case #1 c of
adamc@753	1449 L'.CApp (f, _) => findHead f
adamc@753	1450 \| _ => c
adamc@753	1451
adamc@753	1452 val cl = hnormCon env (findHead c)
adamc@750	1453 in
adamc@750	1454 isClassOrFolder env cl
adamc@750	1455 end
adamc@628	1456 in
adamc@750	1457 if hasInstance dom then
adamc@750	1458 isInstance ()
adamc@750	1459 else
adamc@750	1460 default ()
adamc@628	1461 end
adamc@629	1462 \| (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629	1463 if infer <> L.TypesOnly then
adamc@629	1464 let
adamc@792	1465 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629	1466 val (e, t, gs') = unravel (t', e)
adamc@629	1467 in
adamc@629	1468 (e, t, enD gs @ gs')
adamc@629	1469 end
adamc@629	1470 else
adamc@629	1471 (e, t, [])
adamc@628	1472 \| t => (e, t, [])
adam@1591	1473
adam@1591	1474 val (e, t, gs) = case infer of
adam@1591	1475 L.DontInfer => unravelKind (t, e)
adam@1591	1476 \| _ => unravel (t, e)
adamc@704	1477 in
adam@1591	1478 ((#1 e, loc), (#1 t, loc), map (relocConstraint loc) gs)
adamc@704	1479 end
adamc@15	1480
adamc@628	1481 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171	1482 let
adamc@171	1483 val perror = (L'.PWild, loc)
adamc@171	1484 val terror = (L'.CError, loc)
adamc@171	1485 val pterror = (perror, terror)
adamc@171	1486 val rerror = (pterror, (env, bound))
adamc@171	1487
adamc@191	1488 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188	1489 case (po, to) of
adamc@188	1490 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188	1491 rerror)
adamc@188	1492 \| (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188	1493 rerror)
adamc@191	1494 \| (NONE, NONE) =>
adamc@191	1495 let
adamc@191	1496 val k = (L'.KType, loc)
adam@1639	1497 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@191	1498 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191	1499 in
adamc@191	1500 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191	1501 (env, bound))
adamc@191	1502 end
adamc@188	1503 \| (SOME p, SOME t) =>
adamc@188	1504 let
adamc@628	1505 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191	1506
adamc@191	1507 val k = (L'.KType, loc)
adam@1639	1508 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@194	1509 val nxs = length unifs - 1
adam@1304	1510 val t = ListUtil.foldli (fn (i, u, t) => subConInCon env (nxs - i,
adam@1304	1511 E.mliftConInCon (nxs - i) u) t) t unifs
adamc@191	1512 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188	1513 in
adamc@628	1514 ignore (checkPatCon env p' pt t);
adamc@191	1515 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188	1516 (env, bound))
adamc@188	1517 end
adamc@171	1518 in
adamc@171	1519 case p of
adam@1639	1520 L.PWild => (((L'.PWild, loc), cunif env (loc, (L'.KType, loc))),
adamc@171	1521 (env, bound))
adamc@171	1522 \| L.PVar x =>
adamc@171	1523 let
adamc@171	1524 val t = if SS.member (bound, x) then
adamc@171	1525 (expError env (DuplicatePatternVariable (loc, x));
adamc@171	1526 terror)
adamc@171	1527 else
adam@1639	1528 cunif env (loc, (L'.KType, loc))
adamc@171	1529 in
adamc@182	1530 (((L'.PVar (x, t), loc), t),
adamc@171	1531 (E.pushERel env x t, SS.add (bound, x)))
adamc@171	1532 end
adamc@173	1533 \| L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173	1534 (env, bound))
adamc@171	1535 \| L.PCon ([], x, po) =>
adamc@171	1536 (case E.lookupConstructor env x of
adamc@174	1537 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171	1538 rerror)
adamc@191	1539 \| SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174	1540 \| L.PCon (m1 :: ms, x, po) =>
adamc@174	1541 (case E.lookupStr env m1 of
adamc@174	1542 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174	1543 rerror)
adamc@174	1544 \| SOME (n, sgn) =>
adamc@174	1545 let
adamc@174	1546 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174	1547 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182	1548 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174	1549 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174	1550 ((L'.StrVar n, loc), sgn) ms
adamc@174	1551 in
adamc@174	1552 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174	1553 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174	1554 rerror)
adamc@191	1555 \| SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174	1556 end)
adamc@174	1557
adamc@175	1558 \| L.PRecord (xps, flex) =>
adamc@175	1559 let
adamc@175	1560 val (xpts, (env, bound, _)) =
adamc@175	1561 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175	1562 let
adamc@628	1563 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175	1564 in
adamc@175	1565 if SS.member (fbound, x) then
adamc@175	1566 expError env (DuplicatePatField (loc, x))
adamc@175	1567 else
adamc@175	1568 ();
adamc@175	1569 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175	1570 end)
adamc@175	1571 (env, bound, SS.empty) xps
adamc@175	1572
adamc@175	1573 val k = (L'.KType, loc)
adamc@175	1574 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176	1575 val c =
adamc@175	1576 if flex then
adam@1639	1577 (L'.CConcat (c, cunif env (loc, (L'.KRecord k, loc))), loc)
adamc@175	1578 else
adamc@176	1579 c
adamc@175	1580 in
adamc@182	1581 (((L'.PRecord xpts, loc),
adamc@175	1582 (L'.TRecord c, loc)),
adamc@175	1583 (env, bound))
adamc@175	1584 end
adamc@822	1585
adamc@822	1586 \| L.PAnnot (p, t) =>
adamc@822	1587 let
adamc@822	1588 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822	1589 val (t', k, _) = elabCon (env, D.empty) t
adamc@822	1590 in
adamc@822	1591 checkPatCon env p' pt t';
adamc@822	1592 ((p', t'), (env, bound))
adamc@822	1593 end
adamc@171	1594 end
adamc@171	1595
adamc@819	1596 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819	1597 fun exhaustive (env, t, ps, loc) =
adamc@819	1598 let
adamc@819	1599 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819	1600
adamc@819	1601 fun patConNum pc =
adamc@819	1602 case pc of
adamc@819	1603 L'.PConVar n => n
adamc@819	1604 \| L'.PConProj (m1, ms, x) =>
adamc@819	1605 let
adamc@819	1606 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1607 in
adamc@819	1608 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819	1609 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1610 \| SOME (_, n, _, _, _) => n
adamc@819	1611 end
adamc@819	1612
adamc@819	1613 fun nameOfNum (t, n) =
adamc@819	1614 case t of
adamc@819	1615 L'.CModProj (m1, ms, x) =>
adamc@819	1616 let
adamc@819	1617 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1618 in
adamc@819	1619 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1620 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1621 \| SOME (_, cons) =>
adamc@819	1622 case ListUtil.search (fn (name, n', _) =>
adamc@819	1623 if n' = n then
adamc@819	1624 SOME name
adamc@819	1625 else
adamc@819	1626 NONE) cons of
adamc@819	1627 NONE => fail 9
adamc@819	1628 \| SOME name => L'.PConProj (m1, ms, name)
adamc@819	1629 end
adamc@819	1630 \| _ => L'.PConVar n
adamc@819	1631
adamc@819	1632 fun S (args, c, P) =
adamc@819	1633 List.mapPartial
adamc@819	1634 (fn [] => fail 1
adamc@819	1635 \| p1 :: ps =>
adamc@819	1636 let
adamc@819	1637 val loc = #2 p1
adamc@819	1638
adamc@819	1639 fun wild () =
adamc@819	1640 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819	1641 in
adamc@819	1642 case #1 p1 of
adamc@819	1643 L'.PPrim _ => NONE
adamc@819	1644 \| L'.PCon (_, c', _, NONE) =>
adamc@819	1645 if patConNum c' = c then
adamc@819	1646 SOME ps
adamc@819	1647 else
adamc@819	1648 NONE
adamc@819	1649 \| L'.PCon (_, c', _, SOME p) =>
adamc@819	1650 if patConNum c' = c then
adamc@819	1651 SOME (p :: ps)
adamc@819	1652 else
adamc@819	1653 NONE
adamc@819	1654 \| L'.PRecord xpts =>
adamc@819	1655 SOME (map (fn x =>
adamc@819	1656 case ListUtil.search (fn (x', p, _) =>
adamc@819	1657 if x = x' then
adamc@819	1658 SOME p
adamc@819	1659 else
adamc@819	1660 NONE) xpts of
adamc@819	1661 NONE => (L'.PWild, loc)
adamc@819	1662 \| SOME p => p) args @ ps)
adamc@819	1663 \| L'.PWild => wild ()
adamc@819	1664 \| L'.PVar _ => wild ()
adamc@819	1665 end)
adamc@819	1666 P
adamc@819	1667
adamc@819	1668 fun D P =
adamc@819	1669 List.mapPartial
adamc@819	1670 (fn [] => fail 2
adamc@819	1671 \| (p1, _) :: ps =>
adamc@819	1672 case p1 of
adamc@819	1673 L'.PWild => SOME ps
adamc@819	1674 \| L'.PVar _ => SOME ps
adamc@819	1675 \| L'.PPrim _ => NONE
adamc@819	1676 \| L'.PCon _ => NONE
adamc@819	1677 \| L'.PRecord _ => NONE)
adamc@819	1678 P
adamc@819	1679
adamc@819	1680 fun I (P, q) =
adamc@819	1681 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819	1682 ("q", p_list (p_con env) q)];*)
adamc@819	1683 case q of
adamc@819	1684 [] => (case P of
adamc@819	1685 [] => SOME []
adamc@819	1686 \| _ => NONE)
adamc@819	1687 \| q1 :: qs =>
adamc@819	1688 let
adamc@819	1689 val loc = #2 q1
adamc@819	1690
adamc@819	1691 fun unapp (t, acc) =
adamc@830	1692 case #1 t of
adamc@830	1693 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819	1694 \| _ => (t, rev acc)
adamc@819	1695
adamc@830	1696 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830	1697 val t1 = hnormCon env t1
adam@1303	1698 fun doSub t = foldl (fn (arg, t) => subConInCon env (0, arg) t) t args
adamc@819	1699
adamc@819	1700 fun dtype (dtO, names) =
adamc@819	1701 let
adamc@819	1702 val nameSet = IS.addList (IS.empty, names)
adamc@819	1703 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819	1704 case ps of
adamc@819	1705 [] => fail 4
adamc@819	1706 \| (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819	1707 (IS.delete (nameSet, patConNum pc)
adamc@819	1708 handle NotFound => nameSet)
adamc@819	1709 \| _ => nameSet)
adamc@819	1710 nameSet P
adamc@819	1711 in
adamc@819	1712 nameSet
adamc@819	1713 end
adamc@819	1714
adamc@819	1715 fun default () = (NONE, IS.singleton 0, [])
adamc@819	1716
adamc@819	1717 val (dtO, unused, cons) =
adamc@830	1718 case #1 t1 of
adamc@819	1719 L'.CNamed n =>
adamc@819	1720 let
adamc@819	1721 val dt = E.lookupDatatype env n
adamc@819	1722 val cons = E.constructors dt
adamc@819	1723 in
adamc@819	1724 (SOME dt,
adamc@819	1725 dtype (SOME dt, map #2 cons),
adamc@819	1726 map (fn (_, n, co) =>
adamc@819	1727 (n,
adamc@819	1728 case co of
adamc@819	1729 NONE => []
adamc@819	1730 \| SOME t => [("", doSub t)])) cons)
adamc@819	1731 end
adamc@819	1732 \| L'.CModProj (m1, ms, x) =>
adamc@819	1733 let
adamc@819	1734 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1735 in
adamc@819	1736 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1737 NONE => default ()
adamc@819	1738 \| SOME (_, cons) =>
adamc@819	1739 (NONE,
adamc@819	1740 dtype (NONE, map #2 cons),
adamc@819	1741 map (fn (s, _, co) =>
adamc@819	1742 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819	1743 case co of
adamc@819	1744 NONE => []
adamc@819	1745 \| SOME t => [("", doSub t)])) cons)
adamc@819	1746 end
adamc@830	1747 \| L'.TRecord t =>
adamc@830	1748 (case #1 (hnormCon env t) of
adamc@830	1749 L'.CRecord (_, xts) =>
adamc@830	1750 let
adamc@830	1751 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830	1752 \| _ => NONE) xts
adamc@830	1753 in
adamc@830	1754 if List.all Option.isSome xts then
adamc@830	1755 let
adamc@830	1756 val xts = List.mapPartial (fn x => x) xts
adamc@830	1757 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830	1758 String.compare (x1, x2) = GREATER) xts
adamc@830	1759 in
adamc@830	1760 (NONE, IS.empty, [(0, xts)])
adamc@830	1761 end
adamc@830	1762 else
adamc@830	1763 default ()
adamc@830	1764 end
adamc@830	1765 \| _ => default ())
adamc@819	1766 \| _ => default ()
adamc@819	1767 in
adamc@819	1768 if IS.isEmpty unused then
adamc@819	1769 let
adamc@819	1770 fun recurse cons =
adamc@819	1771 case cons of
adamc@819	1772 [] => NONE
adamc@819	1773 \| (name, args) :: cons =>
adamc@819	1774 case I (S (map #1 args, name, P),
adamc@819	1775 map #2 args @ qs) of
adamc@819	1776 NONE => recurse cons
adamc@819	1777 \| SOME ps =>
adamc@819	1778 let
adamc@819	1779 val nargs = length args
adamc@819	1780 val argPs = List.take (ps, nargs)
adamc@819	1781 val restPs = List.drop (ps, nargs)
adamc@819	1782
adamc@819	1783 val p = case name of
adamc@819	1784 0 => L'.PRecord (ListPair.map
adamc@819	1785 (fn ((name, t), p) => (name, p, t))
adamc@819	1786 (args, argPs))
adamc@830	1787 \| _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819	1788 case argPs of
adamc@819	1789 [] => NONE
adamc@819	1790 \| [p] => SOME p
adamc@819	1791 \| _ => fail 3)
adamc@819	1792 in
adamc@819	1793 SOME ((p, loc) :: restPs)
adamc@819	1794 end
adamc@819	1795 in
adamc@819	1796 recurse cons
adamc@819	1797 end
adamc@819	1798 else
adamc@819	1799 case I (D P, qs) of
adamc@819	1800 NONE => NONE
adamc@819	1801 \| SOME ps =>
adamc@819	1802 let
adamc@819	1803 val p = case cons of
adamc@819	1804 [] => L'.PWild
adamc@819	1805 \| (0, _) :: _ => L'.PWild
adamc@819	1806 \| _ =>
adamc@819	1807 case IS.find (fn _ => true) unused of
adamc@819	1808 NONE => fail 6
adamc@819	1809 \| SOME name =>
adamc@819	1810 case ListUtil.search (fn (name', args) =>
adamc@819	1811 if name = name' then
adamc@819	1812 SOME (name', args)
adamc@819	1813 else
adamc@819	1814 NONE) cons of
adamc@819	1815 SOME (n, []) =>
adamc@830	1816 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819	1817 \| SOME (n, [_]) =>
adamc@830	1818 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819	1819 \| _ => fail 7
adamc@819	1820 in
adamc@819	1821 SOME ((p, loc) :: ps)
adamc@819	1822 end
adamc@819	1823 end
adamc@819	1824 in
adamc@819	1825 case I (map (fn x => [x]) ps, [t]) of
adamc@819	1826 NONE => NONE
adamc@819	1827 \| SOME [p] => SOME p
adamc@819	1828 \| _ => fail 7
adamc@819	1829 end
adamc@819	1830
adamc@217	1831 fun unmodCon env (c, loc) =
adamc@217	1832 case c of
adamc@217	1833 L'.CNamed n =>
adamc@217	1834 (case E.lookupCNamed env n of
adamc@217	1835 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1836 \| _ => (c, loc))
adamc@217	1837 \| L'.CModProj (m1, ms, x) =>
adamc@217	1838 let
adamc@217	1839 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217	1840 in
adamc@217	1841 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217	1842 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217	1843 \| SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1844 \| _ => (c, loc)
adamc@217	1845 end
adamc@217	1846 \| _ => (c, loc)
adamc@217	1847
adamc@721	1848 fun normClassKey env c =
adamc@467	1849 let
adamc@721	1850 val c = hnormCon env c
adamc@467	1851 in
adamc@467	1852 case #1 c of
adamc@467	1853 L'.CApp (c1, c2) =>
adamc@467	1854 let
adamc@721	1855 val c1 = normClassKey env c1
adamc@721	1856 val c2 = normClassKey env c2
adamc@467	1857 in
adamc@467	1858 (L'.CApp (c1, c2), #2 c)
adamc@467	1859 end
adamc@721	1860 \| L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721	1861 normClassKey env c)) xcs), #2 c)
adamc@721	1862 \| _ => unmodCon env c
adamc@467	1863 end
adamc@467	1864
adamc@467	1865 fun normClassConstraint env (c, loc) =
adamc@217	1866 case c of
adamc@217	1867 L'.CApp (f, x) =>
adamc@217	1868 let
adamc@721	1869 val f = normClassKey env f
adamc@467	1870 val x = normClassKey env x
adamc@217	1871 in
adamc@467	1872 (L'.CApp (f, x), loc)
adamc@217	1873 end
adamc@674	1874 \| L'.TFun (c1, c2) =>
adamc@674	1875 let
adamc@674	1876 val c1 = normClassConstraint env c1
adamc@674	1877 val c2 = normClassConstraint env c2
adamc@674	1878 in
adamc@674	1879 (L'.TFun (c1, c2), loc)
adamc@674	1880 end
adamc@674	1881 \| L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adam@1639	1882 \| L'.CUnif (nl, _, _, _, ref (L'.Known c)) => normClassConstraint env (E.mliftConInCon nl c)
adamc@721	1883 \| _ => unmodCon env (c, loc)
adamc@216	1884
adamc@1093	1885 fun findHead e e' =
adamc@1093	1886 let
adamc@1093	1887 fun findHead (e, _) =
adamc@1093	1888 case e of
adamc@1093	1889 L.EVar (_, _, infer) =>
adamc@1093	1890 let
adamc@1093	1891 fun findHead' (e, _) =
adamc@1093	1892 case e of
adamc@1093	1893 L'.ENamed _ => true
adamc@1093	1894 \| L'.EModProj _ => true
adam@1472	1895 \| L'.ERel _ => true
adamc@1093	1896 \| L'.EApp (e, _) => findHead' e
adamc@1093	1897 \| L'.ECApp (e, _) => findHead' e
adamc@1093	1898 \| L'.EKApp (e, _) => findHead' e
adamc@1093	1899 \| _ => false
adamc@1093	1900 in
adamc@1093	1901 if findHead' e' then
adamc@1093	1902 SOME infer
adamc@1093	1903 else
adamc@1093	1904 NONE
adamc@1093	1905 end
adamc@1093	1906 \| L.EApp (e, _) => findHead e
adamc@1093	1907 \| L.ECApp (e, _) => findHead e
adamc@1093	1908 \| L.EDisjointApp e => findHead e
adamc@1093	1909 \| _ => NONE
adamc@1093	1910 in
adamc@1093	1911 findHead e
adamc@1093	1912 end
adamc@1093	1913
adam@1640	1914 datatype needed = Needed of {Cons : (L'.kind * int) SM.map,
adam@1640	1915 NextCon : int,
adamc@1264	1916 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264	1917 Vals : SS.set,
adamc@1270	1918 Mods : (E.env * needed) SM.map}
adamc@1264	1919
adam@1640	1920 fun ncons (Needed r) = map (fn (k, (v, _)) => (k, v))
adam@1640	1921 (ListMergeSort.sort (fn ((_, (_, n1)), (_, (_, n2))) => n1 > n2)
adam@1640	1922 (SM.listItemsi (#Cons r)))
adamc@1264	1923 fun nconstraints (Needed r) = #Constraints r
adamc@1264	1924 fun nvals (Needed r) = #Vals r
adamc@1264	1925 fun nmods (Needed r) = #Mods r
adamc@1264	1926
adamc@1264	1927 val nempty = Needed {Cons = SM.empty,
adam@1640	1928 NextCon = 0,
adamc@1264	1929 Constraints = nil,
adamc@1264	1930 Vals = SS.empty,
adamc@1264	1931 Mods = SM.empty}
adamc@1264	1932
adamc@1264	1933 fun naddCon (r : needed, k, v) =
adamc@1264	1934 let
adamc@1264	1935 val Needed r = r
adamc@1264	1936 in
adam@1640	1937 Needed {Cons = SM.insert (#Cons r, k, (v, #NextCon r)),
adam@1640	1938 NextCon = #NextCon r + 1,
adamc@1264	1939 Constraints = #Constraints r,
adamc@1264	1940 Vals = #Vals r,
adamc@1264	1941 Mods = #Mods r}
adamc@1264	1942 end
adamc@1264	1943
adamc@1264	1944 fun naddConstraint (r : needed, v) =
adamc@1264	1945 let
adamc@1264	1946 val Needed r = r
adamc@1264	1947 in
adamc@1264	1948 Needed {Cons = #Cons r,
adam@1640	1949 NextCon = #NextCon r,
adamc@1264	1950 Constraints = v :: #Constraints r,
adamc@1264	1951 Vals = #Vals r,
adamc@1264	1952 Mods = #Mods r}
adamc@1264	1953 end
adamc@1264	1954
adamc@1264	1955 fun naddVal (r : needed, k) =
adamc@1264	1956 let
adamc@1264	1957 val Needed r = r
adamc@1264	1958 in
adamc@1264	1959 Needed {Cons = #Cons r,
adam@1640	1960 NextCon = #NextCon r,
adamc@1264	1961 Constraints = #Constraints r,
adamc@1264	1962 Vals = SS.add (#Vals r, k),
adamc@1264	1963 Mods = #Mods r}
adamc@1264	1964 end
adamc@1264	1965
adamc@1264	1966 fun naddMod (r : needed, k, v) =
adamc@1264	1967 let
adamc@1264	1968 val Needed r = r
adamc@1264	1969 in
adamc@1264	1970 Needed {Cons = #Cons r,
adam@1640	1971 NextCon = #NextCon r,
adamc@1264	1972 Constraints = #Constraints r,
adamc@1264	1973 Vals = #Vals r,
adamc@1264	1974 Mods = SM.insert (#Mods r, k, v)}
adamc@1264	1975 end
adamc@1264	1976
adamc@1264	1977 fun ndelCon (r : needed, k) =
adamc@1264	1978 let
adamc@1264	1979 val Needed r = r
adamc@1264	1980 in
adamc@1264	1981 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adam@1640	1982 NextCon = #NextCon r,
adamc@1264	1983 Constraints = #Constraints r,
adamc@1264	1984 Vals = #Vals r,
adamc@1264	1985 Mods = #Mods r}
adamc@1264	1986 end
adamc@1264	1987
adamc@1264	1988 fun ndelVal (r : needed, k) =
adamc@1264	1989 let
adamc@1264	1990 val Needed r = r
adamc@1264	1991 in
adamc@1264	1992 Needed {Cons = #Cons r,
adam@1640	1993 NextCon = #NextCon r,
adamc@1264	1994 Constraints = #Constraints r,
adamc@1264	1995 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264	1996 Mods = #Mods r}
adamc@1264	1997 end
adamc@1264	1998
adam@1591	1999 fun chaseUnifs c =
adam@1591	2000 case #1 c of
adam@1639	2001 L'.CUnif (_, _, _, _, ref (L'.Known c)) => chaseUnifs c
adam@1591	2002 \| _ => c
adam@1591	2003
adamc@92	2004 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91	2005 let
adamc@848	2006 (val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)])
adamc@514	2007 (val befor = Time.now ())
adamc@280	2008
adamc@280	2009 val r = case e of
adamc@91	2010 L.EAnnot (e, t) =>
adamc@91	2011 let
adamc@91	2012 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	2013 val (t', _, gs2) = elabCon (env, denv) t
adamc@91	2014 in
adamc@628	2015 checkCon env e' et t';
adamc@628	2016 (e', t', gs1 @ enD gs2)
adamc@91	2017 end
adamc@34	2018
adamc@91	2019 \| L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403	2020 \| L.EVar ([], s, infer) =>
adamc@91	2021 (case E.lookupE env s of
adamc@91	2022 E.NotBound =>
adamc@91	2023 (expError env (UnboundExp (loc, s));
adamc@91	2024 (eerror, cerror, []))
adamc@629	2025 \| E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629	2026 \| E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403	2027 \| L.EVar (m1 :: ms, s, infer) =>
adamc@91	2028 (case E.lookupStr env m1 of
adamc@91	2029 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91	2030 (eerror, cerror, []))
adamc@91	2031 \| SOME (n, sgn) =>
adamc@91	2032 let
adamc@91	2033 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91	2034 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91	2035 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91	2036 (strerror, sgnerror))
adamc@91	2037 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91	2038 ((L'.StrVar n, loc), sgn) ms
adamc@10	2039
adamc@91	2040 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91	2041 NONE => (expError env (UnboundExp (loc, s));
adamc@91	2042 cerror)
adamc@91	2043 \| SOME t => t
adamc@91	2044 in
adamc@629	2045 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91	2046 end)
adamc@86	2047
adamc@349	2048 \| L.EWild =>
adamc@210	2049 let
adamc@349	2050 val r = ref NONE
adam@1639	2051 val c = cunif env (loc, (L'.KType, loc))
adamc@210	2052 in
adamc@349	2053 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210	2054 end
adamc@210	2055
adamc@91	2056 \| L.EApp (e1, e2) =>
adamc@91	2057 let
adamc@91	2058 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093	2059
adamc@403	2060 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71	2061
adam@1639	2062 val dom = cunif env (loc, ktype)
adam@1639	2063 val ran = cunif env (loc, ktype)
adamc@838	2064 val t = (L'.TFun (dom, ran), loc)
adamc@1093	2065
adamc@1093	2066 val () = checkCon env e1' t1 t
adamc@1093	2067 val () = checkCon env e2' t2 dom
adamc@1093	2068
adamc@1093	2069 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093	2070 val (ef, et, gs3) =
adamc@1093	2071 case findHead e1 e1' of
adam@1591	2072 NONE => (ef, (#1 (chaseUnifs ran), loc), [])
adamc@1093	2073 \| SOME infer => elabHead (env, denv) infer ef ran
adamc@91	2074 in
adamc@1093	2075 (ef, et, gs1 @ gs2 @ gs3)
adamc@91	2076 end
adamc@91	2077 \| L.EAbs (x, to, e) =>
adamc@91	2078 let
adamc@91	2079 val (t', gs1) = case to of
adam@1639	2080 NONE => (cunif env (loc, ktype), [])
adamc@91	2081 \| SOME t =>
adamc@91	2082 let
adamc@91	2083 val (t', tk, gs) = elabCon (env, denv) t
adamc@91	2084 in
adamc@91	2085 checkKind env t' tk ktype;
adamc@91	2086 (t', gs)
adamc@91	2087 end
adamc@467	2088 val dom = normClassConstraint env t'
adamc@467	2089 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91	2090 in
adamc@91	2091 ((L'.EAbs (x, t', et, e'), loc),
adamc@91	2092 (L'.TFun (t', et), loc),
adamc@467	2093 enD gs1 @ gs2)
adamc@91	2094 end
adamc@91	2095 \| L.ECApp (e, c) =>
adamc@91	2096 let
adamc@91	2097 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093	2098
adamc@328	2099 val oldEt = et
adamc@403	2100 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628	2101 val (et', _) = hnormCon env et
adamc@91	2102 in
adamc@91	2103 case et' of
adamc@91	2104 L'.CError => (eerror, cerror, [])
adamc@328	2105 \| L'.TCFun (_, x, k, eb) =>
adamc@91	2106 let
adamc@91	2107 val () = checkKind env c' ck k
adam@1303	2108 val eb' = subConInCon env (0, c') eb
adamc@1093	2109
adamc@1093	2110 val ef = (L'.ECApp (e', c'), loc)
adamc@1093	2111 val (ef, eb', gs3) =
adamc@1093	2112 case findHead e e' of
adamc@1093	2113 NONE => (ef, eb', [])
adamc@1093	2114 \| SOME infer => elabHead (env, denv) infer ef eb'
adamc@91	2115 in
adamc@328	2116 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328	2117 ("et", p_con env oldEt),
adamc@328	2118 ("x", PD.string x),
adamc@328	2119 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328	2120 ("c", p_con env c'),
adamc@328	2121 ("eb'", p_con env eb')];*)
adam@1591	2122 (ef, (#1 eb', loc), gs1 @ enD gs2 @ gs3)
adamc@91	2123 end
adamc@91	2124
adamc@91	2125 \| _ =>
adamc@91	2126 (expError env (WrongForm ("constructor function", e', et));
adamc@91	2127 (eerror, cerror, []))
adamc@91	2128 end
adamc@91	2129 \| L.ECAbs (expl, x, k, e) =>
adamc@91	2130 let
adamc@91	2131 val expl' = elabExplicitness expl
adamc@623	2132 val k' = elabKind env k
adamc@328	2133
adamc@328	2134 val env' = E.pushCRel env x k'
adamc@328	2135 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91	2136 in
adamc@91	2137 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91	2138 (L'.TCFun (expl', x, k', et), loc),
adamc@91	2139 gs)
adamc@91	2140 end
adamc@623	2141 \| L.EKAbs (x, e) =>
adamc@623	2142 let
adamc@623	2143 val env' = E.pushKRel env x
adamc@623	2144 val (e', et, gs) = elabExp (env', denv) e
adamc@623	2145 in
adamc@623	2146 ((L'.EKAbs (x, e'), loc),
adamc@623	2147 (L'.TKFun (x, et), loc),
adamc@623	2148 gs)
adamc@623	2149 end
adamc@91	2150
adamc@91	2151 \| L.EDisjoint (c1, c2, e) =>
adamc@91	2152 let
adamc@91	2153 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91	2154 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91	2155
adam@1639	2156 val ku1 = kunif env loc
adam@1639	2157 val ku2 = kunif env loc
adamc@91	2158
adamc@628	2159 val denv' = D.assert env denv (c1', c2')
adamc@628	2160 val (e', t, gs3) = elabExp (env, denv') e
adamc@91	2161 in
adamc@91	2162 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91	2163 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91	2164
adamc@628	2165 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91	2166 end
adamc@629	2167 \| L.EDisjointApp e =>
adamc@629	2168 let
adamc@629	2169 val (e', t, gs1) = elabExp (env, denv) e
adamc@629	2170
adam@1639	2171 val k1 = kunif env loc
adam@1639	2172 val c1 = cunif env (loc, (L'.KRecord k1, loc))
adam@1639	2173 val k2 = kunif env loc
adam@1639	2174 val c2 = cunif env (loc, (L'.KRecord k2, loc))
adam@1639	2175 val t' = cunif env (loc, ktype)
adamc@629	2176 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629	2177 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629	2178 in
adam@1591	2179 (e', (#1 (chaseUnifs t'), loc), enD gs2 @ gs1)
adamc@629	2180 end
adamc@91	2181
adamc@91	2182 \| L.ERecord xes =>
adamc@91	2183 let
adamc@91	2184 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91	2185 let
adamc@91	2186 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91	2187 val (e', et, gs2) = elabExp (env, denv) e
adamc@91	2188 in
adamc@91	2189 checkKind env x' xk kname;
adamc@228	2190 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91	2191 end)
adamc@91	2192 [] xes
adamc@91	2193
adamc@91	2194 val k = (L'.KType, loc)
adamc@91	2195
adamc@91	2196 fun prove (xets, gs) =
adamc@91	2197 case xets of
adamc@91	2198 [] => gs
adamc@91	2199 \| (x, _, t) :: rest =>
adamc@91	2200 let
adamc@91	2201 val xc = (x, t)
adamc@91	2202 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91	2203 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91	2204 let
adamc@91	2205 val xc' = (x', t')
adamc@91	2206 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91	2207 in
adamc@91	2208 D.prove env denv (r1, r2, loc) @ gs
adamc@91	2209 end)
adamc@91	2210 gs rest
adamc@91	2211 in
adamc@91	2212 prove (rest, gs)
adamc@91	2213 end
adamc@228	2214
adamc@228	2215 val gsD = List.mapPartial (fn Disjoint d => SOME d \| _ => NONE) gs
adamc@228	2216 val gsO = List.filter (fn Disjoint _ => false \| _ => true) gs
adamc@91	2217 in
adamc@255	2218 (TextIO.print ("\|gsO\| = " ^ Int.toString (length gsO) ^ "\n");)
adamc@91	2219 ((L'.ERecord xes', loc),
adamc@91	2220 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228	2221 enD (prove (xes', gsD)) @ gsO)
adamc@91	2222 end
adamc@91	2223
adamc@91	2224 \| L.EField (e, c) =>
adamc@91	2225 let
adamc@91	2226 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	2227 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91	2228
adam@1639	2229 val ft = cunif env (loc, ktype)
adam@1639	2230 val rest = cunif env (loc, ktype_record)
adamc@91	2231 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2232 val () = checkCon env e' et
adamc@629	2233 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628	2234 val gs3 = D.prove env denv (first, rest, loc)
adamc@91	2235 in
adamc@628	2236 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91	2237 end
adamc@91	2238
adamc@445	2239 \| L.EConcat (e1, e2) =>
adamc@339	2240 let
adamc@339	2241 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445	2242 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445	2243
adam@1639	2244 val r1 = cunif env (loc, ktype_record)
adam@1639	2245 val r2 = cunif env (loc, ktype_record)
adamc@445	2246
adamc@629	2247 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629	2248 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629	2249
adamc@628	2250 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339	2251 in
adamc@445	2252 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445	2253 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628	2254 gs1 @ gs2 @ enD gs3)
adamc@339	2255 end
adamc@149	2256 \| L.ECut (e, c) =>
adamc@149	2257 let
adamc@149	2258 val (e', et, gs1) = elabExp (env, denv) e
adamc@149	2259 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149	2260
adam@1639	2261 val ft = cunif env (loc, ktype)
adam@1639	2262 val rest = cunif env (loc, ktype_record)
adamc@149	2263 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2264
adamc@629	2265 val () = checkCon env e' et
adamc@629	2266 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149	2267
adamc@628	2268 val gs3 = D.prove env denv (first, rest, loc)
adamc@149	2269 in
adam@1299	2270 checkKind env c' ck kname;
adamc@228	2271 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2272 gs1 @ enD gs2 @ enD gs3)
adamc@149	2273 end
adamc@493	2274 \| L.ECutMulti (e, c) =>
adamc@493	2275 let
adamc@493	2276 val (e', et, gs1) = elabExp (env, denv) e
adamc@493	2277 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493	2278
adam@1639	2279 val rest = cunif env (loc, ktype_record)
adamc@629	2280
adamc@629	2281 val () = checkCon env e' et
adamc@629	2282 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493	2283
adamc@628	2284 val gs3 = D.prove env denv (c', rest, loc)
adamc@493	2285 in
adam@1299	2286 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493	2287 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2288 gs1 @ enD gs2 @ enD gs3)
adamc@493	2289 end
adamc@149	2290
adamc@171	2291 \| L.ECase (e, pes) =>
adamc@171	2292 let
adamc@171	2293 val (e', et, gs1) = elabExp (env, denv) e
adam@1639	2294 val result = cunif env (loc, (L'.KType, loc))
adamc@171	2295 val (pes', gs) = ListUtil.foldlMap
adamc@171	2296 (fn ((p, e), gs) =>
adamc@171	2297 let
adamc@628	2298 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628	2299
adamc@629	2300 val (e', et', gs1) = elabExp (env, denv) e
adamc@171	2301 in
adamc@628	2302 checkPatCon env p' pt et;
adamc@629	2303 checkCon env e' et' result;
adamc@628	2304 ((p', e'), gs1 @ gs)
adamc@171	2305 end)
adamc@171	2306 gs1 pes
adamc@171	2307 in
adamc@819	2308 case exhaustive (env, et, map #1 pes', loc) of
adamc@819	2309 NONE => ()
adamc@830	2310 \| SOME p => if !mayDelay then
adamc@830	2311 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830	2312 else
adamc@830	2313 expError env (Inexhaustive (loc, p));
adamc@172	2314
adamc@628	2315 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171	2316 end
adamc@447	2317
adamc@447	2318 \| L.ELet (eds, e) =>
adamc@447	2319 let
adamc@447	2320 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447	2321 val (e, t, gs2) = elabExp (env, denv) e
adamc@447	2322 in
adamc@825	2323 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447	2324 end
adamc@280	2325 in
adamc@819	2326 (prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];)
adamc@280	2327 r
adamc@91	2328 end
adamc@31	2329
adamc@628	2330 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447	2331 let
adamc@447	2332 val r =
adamc@447	2333 case d of
adamc@825	2334 L.EDVal (p, e) =>
adamc@447	2335 let
adamc@825	2336 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825	2337 val (e', et, gs1) = elabExp (env, denv) e
adamc@825	2338
adamc@825	2339 val () = checkCon env e' et pt
adamc@825	2340
adam@1554	2341 val env' = E.patBinds env p'
adam@1554	2342 (* Redo to get proper detection of type class witnesses *)
adam@1554	2343
adamc@825	2344 val pt = normClassConstraint env pt
adamc@447	2345 in
adamc@830	2346 case exhaustive (env, et, [p'], loc) of
adamc@830	2347 NONE => ()
adamc@830	2348 \| SOME p => if !mayDelay then
adamc@830	2349 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830	2350 else
adamc@830	2351 expError env (Inexhaustive (loc, p));
adamc@830	2352
adamc@825	2353 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447	2354 end
adamc@447	2355 \| L.EDValRec vis =>
adamc@447	2356 let
adamc@447	2357 fun allowable (e, _) =
adamc@447	2358 case e of
adamc@447	2359 L.EAbs _ => true
adamc@447	2360 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	2361 \| L.EKAbs (_, e) => allowable e
adamc@447	2362 \| L.EDisjoint (_, _, e) => allowable e
adamc@447	2363 \| _ => false
adamc@447	2364
adamc@447	2365 val (vis, gs) = ListUtil.foldlMap
adamc@447	2366 (fn ((x, co, e), gs) =>
adamc@447	2367 let
adamc@447	2368 val (c', _, gs1) = case co of
adam@1639	2369 NONE => (cunif env (loc, ktype), ktype, [])
adamc@447	2370 \| SOME c => elabCon (env, denv) c
adamc@447	2371 in
adamc@447	2372 ((x, c', e), enD gs1 @ gs)
adamc@447	2373 end) gs vis
adamc@447	2374
adamc@447	2375 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447	2376
adamc@447	2377 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447	2378 let
adamc@447	2379 val (e', et, gs1) = elabExp (env, denv) e
adamc@447	2380 in
adamc@628	2381 checkCon env e' et c';
adamc@447	2382 if allowable e then
adamc@447	2383 ()
adamc@447	2384 else
adamc@447	2385 expError env (IllegalRec (x, e'));
adamc@628	2386 ((x, c', e'), gs1 @ gs)
adamc@447	2387 end) gs vis
adamc@447	2388 in
adamc@447	2389 ((L'.EDValRec vis, loc), (env, gs))
adamc@447	2390 end
adamc@447	2391 in
adamc@447	2392 r
adamc@447	2393 end
adamc@447	2394
adamc@42	2395 val hnormSgn = E.hnormSgn
adamc@31	2396
adamc@210	2397 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338	2398 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754	2399 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754	2400 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459	2401 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718	2402 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205	2403
adamc@469	2404 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469	2405 case E.lookupStr env str of
adamc@469	2406 NONE => (strError env (UnboundStr (loc, str));
adamc@469	2407 denv)
adamc@469	2408 \| SOME (n, sgn) =>
adamc@469	2409 let
adamc@469	2410 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469	2411 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469	2412 NONE => (strError env (UnboundStr (loc, m));
adamc@469	2413 (strerror, sgnerror))
adamc@469	2414 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469	2415 ((L'.StrVar n, loc), sgn) strs
adamc@1030	2416
adamc@1030	2417 fun collect first (st, sgn) =
adamc@1030	2418 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182	2419 NONE => []
adamc@1030	2420 \| SOME cs =>
adamc@1030	2421 case #1 (hnormSgn env sgn) of
adamc@1030	2422 L'.SgnConst sgis =>
adamc@1030	2423 foldl (fn (sgi, cs) =>
adamc@1030	2424 case #1 sgi of
adamc@1030	2425 L'.SgiStr (x, _, _) =>
adamc@1030	2426 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030	2427 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030	2428 \| SOME sgn' =>
adamc@1030	2429 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030	2430 cs))
adamc@1030	2431 \| _ => cs) cs sgis
adamc@1030	2432 \| _ => cs
adamc@469	2433 in
adamc@1030	2434 foldl (fn ((c1, c2), denv) =>
adamc@1030	2435 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469	2436 end
adamc@469	2437
adamc@88	2438 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270	2439 ((Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));)
adamc@1270	2440 case sgi of
adamc@1270	2441 L.SgiConAbs (x, k) =>
adamc@1270	2442 let
adamc@1270	2443 val k' = elabKind env k
adamc@1270	2444
adamc@1270	2445 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270	2446 in
adamc@1270	2447 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270	2448 end
adamc@1270	2449
adamc@1270	2450 \| L.SgiCon (x, ko, c) =>
adamc@1270	2451 let
adamc@1270	2452 val k' = case ko of
adam@1639	2453 NONE => kunif env loc
adamc@1270	2454 \| SOME k => elabKind env k
adamc@1270	2455
adamc@1270	2456 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2457 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270	2458 in
adamc@1270	2459 checkKind env c' ck k';
adamc@1270	2460
adamc@1270	2461 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2462 end
adamc@1270	2463
adamc@1270	2464 \| L.SgiDatatype dts =>
adamc@1270	2465 let
adamc@1270	2466 val k = (L'.KType, loc)
adamc@1270	2467
adamc@1270	2468 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270	2469 let
adamc@1270	2470 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2471 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270	2472 in
adamc@1270	2473 ((x, n, xs, xcs), env)
adamc@1270	2474 end)
adamc@1270	2475 env dts
adamc@1270	2476
adamc@1270	2477 val (dts, env) = ListUtil.foldlMap
adamc@1270	2478 (fn ((x, n, xs, xcs), env) =>
adamc@1270	2479 let
adamc@1270	2480 val t = (L'.CNamed n, loc)
adamc@1270	2481 val nxs = length xs - 1
adamc@1270	2482 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270	2483 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270	2484
adamc@1270	2485 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270	2486 (E.pushCRel env' x k,
adamc@1270	2487 D.enter denv')) (env, denv) xs
adamc@1270	2488
adamc@1270	2489 val (xcs, (used, env, gs)) =
adamc@1270	2490 ListUtil.foldlMap
adamc@1270	2491 (fn ((x, to), (used, env, gs)) =>
adamc@1270	2492 let
adamc@1270	2493 val (to, t, gs') = case to of
adamc@1270	2494 NONE => (NONE, t, gs)
adamc@1270	2495 \| SOME t' =>
adamc@1270	2496 let
adamc@1270	2497 val (t', tk, gs') =
adamc@1270	2498 elabCon (env', denv') t'
adamc@1270	2499 in
adamc@1270	2500 checkKind env' t' tk k;
adamc@1270	2501 (SOME t',
adamc@1270	2502 (L'.TFun (t', t), loc),
adamc@1270	2503 gs' @ gs)
adamc@1270	2504 end
adamc@1270	2505 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2506 t xs
adamc@1270	2507
adamc@1270	2508 val (env, n') = E.pushENamed env x t
adamc@1270	2509 in
adamc@1270	2510 if SS.member (used, x) then
adamc@1270	2511 strError env (DuplicateConstructor (x, loc))
adamc@1270	2512 else
adamc@1270	2513 ();
adamc@1270	2514 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270	2515 end)
adamc@1270	2516 (SS.empty, env, []) xcs
adamc@1270	2517 in
adamc@1270	2518 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270	2519 end)
adamc@1270	2520 env dts
adamc@1270	2521 in
adamc@1270	2522 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270	2523 end
adamc@1270	2524
adamc@1270	2525 \| L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270	2526
adamc@1270	2527 \| L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270	2528 (case E.lookupStr env m1 of
adamc@1270	2529 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270	2530 ([], (env, denv, gs)))
adamc@1270	2531 \| SOME (n, sgn) =>
adamc@1270	2532 let
adamc@1270	2533 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270	2534 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270	2535 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270	2536 (strerror, sgnerror))
adamc@1270	2537 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270	2538 ((L'.StrVar n, loc), sgn) ms
adamc@1270	2539 in
adamc@1270	2540 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270	2541 (L'.CModProj (n, ms, s), _) =>
adamc@1270	2542 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270	2543 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270	2544 ([], (env, denv, [])))
adamc@1270	2545 \| SOME (xs, xncs) =>
adamc@1270	2546 let
adamc@1270	2547 val k = (L'.KType, loc)
adamc@1270	2548 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2549
adamc@1270	2550 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270	2551 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270	2552 val env = E.pushDatatype env n' xs xncs
adamc@1270	2553
adamc@1270	2554 val t = (L'.CNamed n', loc)
adamc@1270	2555 val env = foldl (fn ((x, n, to), env) =>
adamc@805	2556 let
adamc@1270	2557 val t = case to of
adamc@1270	2558 NONE => t
adamc@1270	2559 \| SOME t' => (L'.TFun (t', t), loc)
adamc@1270	2560
adamc@1270	2561 val t = foldr (fn (x, t) =>
adamc@1270	2562 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2563 t xs
adamc@805	2564 in
adamc@1270	2565 E.pushENamedAs env x n t
adamc@1270	2566 end) env xncs
adamc@1270	2567 in
adamc@1270	2568 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270	2569 end)
adamc@1270	2570 \| _ => (strError env (NotDatatype loc);
adamc@1270	2571 ([], (env, denv, [])))
adamc@1270	2572 end)
adamc@1270	2573
adamc@1270	2574 \| L.SgiVal (x, c) =>
adamc@1270	2575 let
adamc@1270	2576 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2577
adamc@1270	2578 val old = c'
adamc@1270	2579 val c' = normClassConstraint env c'
adamc@1270	2580 val (env', n) = E.pushENamed env x c'
adamc@1270	2581 in
adamc@1270	2582 (unifyKinds env ck ktype
adamc@1270	2583 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@1270	2584
adamc@1270	2585 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2586 end
adamc@1270	2587
adamc@1270	2588 \| L.SgiTable (x, c, pe, ce) =>
adamc@1270	2589 let
adamc@1270	2590 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270	2591
adamc@1270	2592 val (c', ck, gs') = elabCon (env, denv) c
adam@1639	2593 val pkey = cunif env (loc, cstK)
adam@1639	2594 val visible = cunif env (loc, cstK)
adamc@1270	2595 val (env', ds, uniques) =
adamc@1270	2596 case (#1 pe, #1 ce) of
adamc@1270	2597 (L.EVar (["Basis"], "no_primary_key", _), L.EVar (["Basis"], "no_constraint", _)) =>
adamc@1270	2598 let
adamc@1270	2599 val x' = x ^ "_hidden_constraints"
adamc@1270	2600 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@1270	2601 val hidden = (L'.CNamed hidden_n, loc)
adamc@1270	2602 in
adamc@1270	2603 (env', [(L'.SgiConAbs (x', hidden_n, cstK), loc)], (L'.CConcat (visible, hidden), loc))
adamc@1270	2604 end
adamc@1270	2605 \| _ => (env, [], visible)
adamc@1270	2606
adamc@1270	2607 val ct = tableOf ()
adamc@1270	2608 val ct = (L'.CApp (ct, c'), loc)
adamc@1270	2609 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270	2610
adamc@1270	2611 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270	2612 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707	2613 \| _ => NONE) gs''
adamc@707	2614
adamc@1270	2615 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270	2616 val pst = (L'.CApp (pst, c'), loc)
adamc@1270	2617 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270	2618
adamc@1270	2619 val (env', n) = E.pushENamed env' x ct
adamc@1270	2620
adamc@1270	2621 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270	2622 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270	2623 \| _ => NONE) gs'''
adamc@1270	2624
adamc@1270	2625 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270	2626 val cst = (L'.CApp (cst, c'), loc)
adamc@1270	2627 val cst = (L'.CApp (cst, visible), loc)
adamc@1270	2628 in
adamc@1270	2629 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270	2630 checkCon env' pe' pet pst;
adamc@1270	2631 checkCon env' ce' cet cst;
adamc@1270	2632
adamc@1270	2633 (ds @ [(L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270	2634 end
adamc@1270	2635
adamc@1270	2636 \| L.SgiStr (x, sgn) =>
adamc@1270	2637 let
adamc@1270	2638 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2639 val (env', n) = E.pushStrNamed env x sgn'
adamc@1270	2640 in
adamc@1270	2641 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270	2642 end
adamc@1270	2643
adamc@1270	2644 \| L.SgiSgn (x, sgn) =>
adamc@1270	2645 let
adamc@1270	2646 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2647 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270	2648 in
adamc@1270	2649 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270	2650 end
adamc@1270	2651
adamc@1270	2652 \| L.SgiInclude sgn =>
adamc@1270	2653 let
adamc@1270	2654 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2655 in
adamc@1270	2656 case #1 (hnormSgn env sgn') of
adamc@1270	2657 L'.SgnConst sgis =>
adamc@1270	2658 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270	2659 \| _ => (sgnError env (NotIncludable sgn');
adamc@1270	2660 ([], (env, denv, [])))
adamc@1270	2661 end
adamc@1270	2662
adamc@1270	2663 \| L.SgiConstraint (c1, c2) =>
adamc@1270	2664 let
adamc@1270	2665 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270	2666 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270	2667
adamc@1270	2668 val denv = D.assert env denv (c1', c2')
adamc@1270	2669 in
adam@1639	2670 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639	2671 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@1270	2672
adamc@1270	2673 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270	2674 end
adamc@1270	2675
adamc@1270	2676 \| L.SgiClassAbs (x, k) =>
adamc@1270	2677 let
adamc@1270	2678 val k = elabKind env k
adamc@1270	2679 val (env, n) = E.pushCNamed env x k NONE
adamc@1270	2680 val env = E.pushClass env n
adamc@1270	2681 in
adamc@1270	2682 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270	2683 end
adamc@1270	2684
adamc@1270	2685 \| L.SgiClass (x, k, c) =>
adamc@1270	2686 let
adamc@1270	2687 val k = elabKind env k
adamc@1270	2688 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270	2689 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270	2690 val env = E.pushClass env n
adamc@1270	2691 in
adamc@1270	2692 checkKind env c' ck k;
adamc@1270	2693 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270	2694 end)
adamc@211	2695
adamc@83	2696 and elabSgn (env, denv) (sgn, loc) =
adamc@31	2697 case sgn of
adamc@31	2698 L.SgnConst sgis =>
adamc@31	2699 let
adamc@88	2700 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62	2701
adamc@62	2702 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62	2703 case sgi of
adamc@62	2704 L'.SgiConAbs (x, _, _) =>
adamc@62	2705 (if SS.member (cons, x) then
adamc@62	2706 sgnError env (DuplicateCon (loc, x))
adamc@62	2707 else
adamc@62	2708 ();
adamc@62	2709 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2710 \| L'.SgiCon (x, _, _, _) =>
adamc@62	2711 (if SS.member (cons, x) then
adamc@62	2712 sgnError env (DuplicateCon (loc, x))
adamc@62	2713 else
adamc@62	2714 ();
adamc@62	2715 (SS.add (cons, x), vals, sgns, strs))
adamc@805	2716 \| L'.SgiDatatype dts =>
adamc@156	2717 let
adamc@805	2718 val (cons, vals) =
adamc@805	2719 let
adamc@805	2720 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805	2721 let
adamc@805	2722 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805	2723 (if SS.member (vals, x) then
adamc@805	2724 sgnError env (DuplicateVal (loc, x))
adamc@805	2725 else
adamc@805	2726 ();
adamc@805	2727 SS.add (vals, x)))
adamc@805	2728 vals xncs
adamc@805	2729 in
adamc@805	2730 if SS.member (cons, x) then
adamc@805	2731 sgnError env (DuplicateCon (loc, x))
adamc@805	2732 else
adamc@805	2733 ();
adamc@805	2734 (SS.add (cons, x), vals)
adamc@805	2735 end
adamc@805	2736 in
adamc@805	2737 foldl doOne (cons, vals) dts
adamc@805	2738 end
adamc@156	2739 in
adamc@805	2740 (cons, vals, sgns, strs)
adamc@156	2741 end
adamc@191	2742 \| L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156	2743 (if SS.member (cons, x) then
adamc@156	2744 sgnError env (DuplicateCon (loc, x))
adamc@156	2745 else
adamc@156	2746 ();
adamc@156	2747 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2748 \| L'.SgiVal (x, _, _) =>
adamc@62	2749 (if SS.member (vals, x) then
adamc@62	2750 sgnError env (DuplicateVal (loc, x))
adamc@62	2751 else
adamc@62	2752 ();
adamc@62	2753 (cons, SS.add (vals, x), sgns, strs))
adamc@62	2754 \| L'.SgiSgn (x, _, _) =>
adamc@62	2755 (if SS.member (sgns, x) then
adamc@62	2756 sgnError env (DuplicateSgn (loc, x))
adamc@62	2757 else
adamc@62	2758 ();
adamc@62	2759 (cons, vals, SS.add (sgns, x), strs))
adamc@62	2760 \| L'.SgiStr (x, _, _) =>
adamc@62	2761 (if SS.member (strs, x) then
adamc@62	2762 sgnError env (DuplicateStr (loc, x))
adamc@62	2763 else
adamc@62	2764 ();
adamc@88	2765 (cons, vals, sgns, SS.add (strs, x)))
adamc@203	2766 \| L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563	2767 \| L'.SgiClassAbs (x, _, _) =>
adamc@211	2768 (if SS.member (cons, x) then
adamc@211	2769 sgnError env (DuplicateCon (loc, x))
adamc@211	2770 else
adamc@211	2771 ();
adamc@211	2772 (SS.add (cons, x), vals, sgns, strs))
adamc@563	2773 \| L'.SgiClass (x, _, _, _) =>
adamc@211	2774 (if SS.member (cons, x) then
adamc@211	2775 sgnError env (DuplicateCon (loc, x))
adamc@211	2776 else
adamc@211	2777 ();
adamc@460	2778 (SS.add (cons, x), vals, sgns, strs)))
adamc@62	2779 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31	2780 in
adamc@83	2781 ((L'.SgnConst sgis', loc), gs)
adamc@31	2782 end
adamc@31	2783 \| L.SgnVar x =>
adamc@31	2784 (case E.lookupSgn env x of
adamc@31	2785 NONE =>
adamc@31	2786 (sgnError env (UnboundSgn (loc, x));
adamc@83	2787 ((L'.SgnError, loc), []))
adamc@83	2788 \| SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41	2789 \| L.SgnFun (m, dom, ran) =>
adamc@41	2790 let
adamc@83	2791 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	2792 val (env', n) = E.pushStrNamed env m dom'
adamc@469	2793 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469	2794 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41	2795 in
adamc@83	2796 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41	2797 end
adamc@42	2798 \| L.SgnWhere (sgn, x, c) =>
adamc@42	2799 let
adamc@83	2800 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83	2801 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42	2802 in
adamc@42	2803 case #1 (hnormSgn env sgn') of
adamc@83	2804 L'.SgnError => (sgnerror, [])
adamc@42	2805 \| L'.SgnConst sgis =>
adamc@75	2806 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75	2807 x' = x andalso
adamc@623	2808 (unifyKinds env k ck
adamc@75	2809 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42	2810 true)
adamc@42	2811 \| _ => false) sgis then
adamc@83	2812 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42	2813 else
adamc@42	2814 (sgnError env (UnWhereable (sgn', x));
adamc@83	2815 (sgnerror, []))
adamc@42	2816 \| _ => (sgnError env (UnWhereable (sgn', x));
adamc@83	2817 (sgnerror, []))
adamc@42	2818 end
adamc@59	2819 \| L.SgnProj (m, ms, x) =>
adamc@59	2820 (case E.lookupStr env m of
adamc@59	2821 NONE => (strError env (UnboundStr (loc, m));
adamc@83	2822 (sgnerror, []))
adamc@59	2823 \| SOME (n, sgn) =>
adamc@59	2824 let
adamc@59	2825 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59	2826 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59	2827 NONE => (strError env (UnboundStr (loc, m));
adamc@59	2828 (strerror, sgnerror))
adamc@59	2829 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59	2830 ((L'.StrVar n, loc), sgn) ms
adamc@59	2831 in
adamc@59	2832 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59	2833 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83	2834 (sgnerror, []))
adamc@83	2835 \| SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59	2836 end)
adamc@59	2837
adamc@31	2838
adamc@706	2839 and selfify env {str, strs, sgn} =
adamc@66	2840 case #1 (hnormSgn env sgn) of
adamc@66	2841 L'.SgnError => sgn
adamc@66	2842 \| L'.SgnVar _ => sgn
adamc@66	2843
adamc@66	2844 \| L'.SgnConst sgis =>
adam@1387	2845 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387	2846 (fn (sgi, env) =>
adam@1387	2847 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387	2848 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2849 \| (L'.SgiDatatype dts, loc) =>
adam@1387	2850 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387	2851 \| (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387	2852 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2853 \| (L'.SgiStr (x, n, sgn), loc) =>
adam@1387	2854 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387	2855 \| x => [x],
adam@1387	2856 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66	2857 \| L'.SgnFun _ => sgn
adamc@66	2858 \| L'.SgnWhere _ => sgn
adamc@66	2859 \| L'.SgnProj (m, ms, x) =>
adamc@66	2860 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2861 (L'.StrVar m, #2 sgn) ms,
adamc@66	2862 sgn = #2 (E.lookupStrNamed env m),
adamc@66	2863 field = x} of
adamc@66	2864 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66	2865 \| SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66	2866
adamc@706	2867 and selfifyAt env {str, sgn} =
adamc@66	2868 let
adamc@66	2869 fun self (str, _) =
adamc@66	2870 case str of
adamc@66	2871 L'.StrVar x => SOME (x, [])
adamc@66	2872 \| L'.StrProj (str, x) =>
adamc@66	2873 (case self str of
adamc@66	2874 NONE => NONE
adamc@66	2875 \| SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66	2876 \| _ => NONE
adamc@66	2877 in
adamc@66	2878 case self str of
adamc@66	2879 NONE => sgn
adamc@66	2880 \| SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66	2881 end
adamc@66	2882
adamc@706	2883 and dopen env {str, strs, sgn} =
adamc@66	2884 let
adam@1527	2885 fun isVisible x = x <> "" andalso String.sub (x, 0) <> #"?"
adam@1527	2886
adamc@66	2887 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2888 (L'.StrVar str, #2 sgn) strs
adamc@66	2889 in
adamc@66	2890 case #1 (hnormSgn env sgn) of
adamc@66	2891 L'.SgnConst sgis =>
adamc@805	2892 ListUtil.foldlMapConcat
adamc@805	2893 (fn ((sgi, loc), env') =>
adamc@805	2894 let
adamc@805	2895 val d =
adamc@805	2896 case sgi of
adamc@805	2897 L'.SgiConAbs (x, n, k) =>
adam@1527	2898 if isVisible x then
adam@1527	2899 let
adam@1527	2900 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	2901 in
adam@1527	2902 [(L'.DCon (x, n, k, c), loc)]
adam@1527	2903 end
adam@1527	2904 else
adam@1527	2905 []
adamc@805	2906 \| L'.SgiCon (x, n, k, c) =>
adam@1527	2907 if isVisible x then
adam@1527	2908 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1527	2909 else
adam@1527	2910 []
adamc@805	2911 \| L'.SgiDatatype dts =>
adam@1527	2912 List.mapPartial (fn (x, n, xs, xncs) => if isVisible x then
adam@1527	2913 SOME (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adam@1527	2914 else
adam@1527	2915 NONE) dts
adamc@805	2916 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adam@1527	2917 if isVisible x then
adam@1527	2918 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adam@1527	2919 else
adam@1527	2920 []
adamc@805	2921 \| L'.SgiVal (x, n, t) =>
adam@1527	2922 if isVisible x then
adam@1527	2923 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adam@1527	2924 else
adam@1527	2925 []
adamc@805	2926 \| L'.SgiStr (x, n, sgn) =>
adam@1527	2927 if isVisible x then
adam@1527	2928 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adam@1527	2929 else
adam@1527	2930 []
adamc@805	2931 \| L'.SgiSgn (x, n, sgn) =>
adam@1527	2932 if isVisible x then
adam@1527	2933 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adam@1527	2934 else
adam@1527	2935 []
adamc@805	2936 \| L'.SgiConstraint (c1, c2) =>
adamc@805	2937 [(L'.DConstraint (c1, c2), loc)]
adamc@805	2938 \| L'.SgiClassAbs (x, n, k) =>
adam@1527	2939 if isVisible x then
adam@1527	2940 let
adam@1527	2941 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	2942 in
adam@1527	2943 [(L'.DCon (x, n, k, c), loc)]
adam@1527	2944 end
adam@1527	2945 else
adam@1527	2946 []
adamc@805	2947 \| L'.SgiClass (x, n, k, _) =>
adam@1527	2948 if isVisible x then
adam@1527	2949 let
adam@1527	2950 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	2951 in
adam@1527	2952 [(L'.DCon (x, n, k, c), loc)]
adam@1527	2953 end
adam@1527	2954 else
adam@1527	2955 []
adamc@805	2956 in
adamc@805	2957 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805	2958 end)
adamc@805	2959 env sgis
adamc@66	2960 \| _ => (strError env (UnOpenable sgn);
adamc@628	2961 ([], env))
adamc@66	2962 end
adamc@66	2963
adamc@706	2964 and sgiOfDecl (d, loc) =
adamc@31	2965 case d of
adamc@123	2966 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156	2967 \| L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156	2968 \| L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123	2969 \| L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123	2970 \| L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123	2971 \| L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123	2972 \| L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	2973 \| L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	2974 \| L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123	2975 \| L'.DExport _ => []
adamc@707	2976 \| L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707	2977 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707	2978 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460	2979 \| L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754	2980 \| L'.DView (tn, x, n, _, c) =>
adamc@754	2981 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563	2982 \| L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271	2983 \| L'.DDatabase _ => []
adamc@460	2984 \| L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720	2985 \| L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075	2986 \| L'.DTask _ => []
adamc@1199	2987 \| L'.DPolicy _ => []
adam@1294	2988 \| L'.DOnError _ => []
adamc@88	2989
adamc@1000	2990 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469	2991 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469	2992 ("sgn2", p_sgn env sgn2)];*)
adamc@35	2993 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31	2994 (L'.SgnError, _) => ()
adamc@31	2995 \| (_, L'.SgnError) => ()
adamc@31	2996
adamc@31	2997 \| (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31	2998 let
adamc@362	2999 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362	3000 ("sgn2", p_sgn env sgn2),
adamc@362	3001 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362	3002 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362	3003
adamc@838	3004 fun cpart n = IM.find (!counterparts, n)
adamc@838	3005 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838	3006
adamc@838	3007 val sub2 = U.Con.map {kind = fn k => k,
adamc@838	3008 con = fn c =>
adamc@838	3009 case c of
adamc@838	3010 L'.CNamed n2 =>
adamc@838	3011 (case cpart n2 of
adamc@838	3012 NONE => c
adamc@838	3013 \| SOME n1 => L'.CNamed n1)
adamc@838	3014 \| _ => c}
adamc@838	3015
adamc@628	3016 fun folder (sgi2All as (sgi, loc), env) =
adamc@31	3017 let
adam@1668	3018 (val () = prefaces "folder" [("sgi2", p_sgn_item env sgi2All)])
adamc@362	3019
adamc@805	3020 fun seek' f p =
adamc@31	3021 let
adamc@628	3022 fun seek env ls =
adamc@31	3023 case ls of
adamc@805	3024 [] => f env
adamc@31	3025 \| h :: t =>
adamc@469	3026 case p (env, h) of
adamc@469	3027 NONE =>
adamc@469	3028 let
adamc@469	3029 val env = case #1 h of
adamc@469	3030 L'.SgiCon (x, n, k, c) =>
adamc@471	3031 if E.checkENamed env n then
adamc@471	3032 env
adamc@471	3033 else
adamc@471	3034 E.pushCNamedAs env x n k (SOME c)
adamc@469	3035 \| L'.SgiConAbs (x, n, k) =>
adamc@471	3036 if E.checkENamed env n then
adamc@471	3037 env
adamc@471	3038 else
adamc@471	3039 E.pushCNamedAs env x n k NONE
adamc@469	3040 \| _ => env
adamc@469	3041 in
adamc@628	3042 seek (E.sgiBinds env h) t
adamc@469	3043 end
adamc@88	3044 \| SOME envs => envs
adamc@31	3045 in
adamc@628	3046 seek env sgis1
adamc@31	3047 end
adamc@805	3048
adamc@1000	3049 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805	3050 env))
adamc@31	3051 in
adamc@31	3052 case sgi of
adamc@31	3053 L'.SgiConAbs (x, n2, k2) =>
adam@1591	3054 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@31	3055 let
adamc@41	3056 fun found (x', n1, k1, co1) =
adamc@41	3057 if x = x' then
adamc@41	3058 let
adamc@623	3059 val () = unifyKinds env k1 k2
adamc@41	3060 handle KUnify (k1, k2, err) =>
adam@1591	3061 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000	3062 sgi2All, k2, err))
adamc@41	3063 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41	3064 in
adamc@41	3065 SOME (if n1 = n2 then
adamc@41	3066 env
adamc@41	3067 else
adamc@838	3068 (cparts (n2, n1);
adamc@838	3069 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41	3070 end
adamc@41	3071 else
adamc@41	3072 NONE
adamc@31	3073 in
adamc@31	3074 case sgi1 of
adamc@41	3075 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41	3076 \| L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805	3077 \| L'.SgiDatatype dts =>
adamc@191	3078 let
adamc@191	3079 val k = (L'.KType, loc)
adamc@805	3080
adamc@805	3081 fun search dts =
adamc@805	3082 case dts of
adamc@805	3083 [] => NONE
adamc@805	3084 \| (x', n1, xs, _) :: dts =>
adamc@805	3085 let
adamc@805	3086 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	3087 in
adamc@805	3088 case found (x', n1, k', NONE) of
adamc@805	3089 NONE => search dts
adamc@805	3090 \| x => x
adamc@805	3091 end
adamc@191	3092 in
adamc@805	3093 search dts
adamc@191	3094 end
adamc@191	3095 \| L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191	3096 let
adamc@191	3097 val k = (L'.KType, loc)
adamc@191	3098 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191	3099 in
adamc@191	3100 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191	3101 end
adamc@711	3102 \| L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711	3103 \| L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31	3104 \| _ => NONE
adamc@31	3105 end)
adamc@31	3106
adamc@31	3107 \| L'.SgiCon (x, n2, k2, c2) =>
adam@1591	3108 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3109 let
adamc@211	3110 fun found (x', n1, k1, c1) =
adamc@211	3111 if x = x' then
adamc@211	3112 let
adamc@838	3113 val c2 = sub2 c2
adamc@838	3114
adamc@327	3115 fun good () =
adamc@327	3116 let
adamc@327	3117 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327	3118 val env = if n1 = n2 then
adamc@327	3119 env
adamc@327	3120 else
adamc@839	3121 (cparts (n2, n1);
adamc@839	3122 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327	3123 in
adamc@628	3124 SOME env
adamc@327	3125 end
adamc@211	3126 in
adamc@987	3127 (unifyCons env loc c1 c2;
adamc@628	3128 good ())
adamc@211	3129 handle CUnify (c1, c2, err) =>
adam@1591	3130 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adamc@1000	3131 sgi2All, c2, err));
adamc@211	3132 good ())
adamc@211	3133 end
adamc@211	3134 else
adamc@211	3135 NONE
adamc@211	3136 in
adamc@211	3137 case sgi1 of
adamc@211	3138 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711	3139 \| L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	3140 \| _ => NONE
adamc@211	3141 end)
adamc@31	3142
adamc@805	3143 \| L'.SgiDatatype dts2 =>
adamc@805	3144 let
adam@1591	3145 fun found' (sgi1All as (_, loc), (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805	3146 if x1 <> x2 then
adamc@805	3147 NONE
adamc@805	3148 else
adamc@805	3149 let
adamc@805	3150 fun mismatched ue =
adam@1591	3151 (sgnError env (SgiMismatchedDatatypes (loc, sgi1All, sgi2All, ue));
adamc@805	3152 SOME env)
adamc@805	3153
adamc@805	3154 val k = (L'.KType, loc)
adamc@805	3155 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805	3156
adamc@805	3157 fun good () =
adamc@805	3158 let
adamc@805	3159 val env = E.sgiBinds env sgi1All
adamc@805	3160 val env = if n1 = n2 then
adamc@805	3161 env
adamc@805	3162 else
adamc@838	3163 (cparts (n2, n1);
adamc@838	3164 E.pushCNamedAs env x1 n2 k'
adamc@838	3165 (SOME (L'.CNamed n1, loc)))
adamc@805	3166 in
adamc@805	3167 SOME env
adamc@805	3168 end
adamc@805	3169
adamc@805	3170 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805	3171 val env = if n1 = n2 then
adamc@805	3172 env
adamc@805	3173 else
adamc@838	3174 (cparts (n2, n1);
adamc@838	3175 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805	3176 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805	3177 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805	3178 String.compare (x1, x2) <> EQUAL
adamc@805	3179 orelse case (t1, t2) of
adamc@805	3180 (NONE, NONE) => false
adamc@805	3181 \| (SOME t1, SOME t2) =>
adamc@987	3182 (unifyCons env loc t1 (sub2 t2); false)
adamc@805	3183 \| _ => true
adamc@805	3184 in
adamc@805	3185 (if xs1 <> xs2
adamc@805	3186 orelse length xncs1 <> length xncs2
adamc@805	3187 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805	3188 mismatched NONE
adamc@160	3189 else
adamc@805	3190 good ())
adamc@805	3191 handle CUnify ue => mismatched (SOME ue)
adamc@805	3192 end
adamc@805	3193 in
adamc@805	3194 seek'
adamc@805	3195 (fn _ =>
adamc@805	3196 let
adamc@805	3197 fun seekOne (dt2, env) =
adamc@805	3198 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3199 case sgi1 of
adamc@805	3200 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805	3201 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805	3202 \| _ => NONE)
adamc@805	3203
adamc@805	3204 fun seekAll (dts, env) =
adamc@805	3205 case dts of
adamc@805	3206 [] => env
adamc@805	3207 \| dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805	3208 in
adamc@805	3209 seekAll (dts2, env)
adamc@805	3210 end)
adamc@805	3211 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3212 let
adamc@805	3213 fun found dts1 =
adamc@805	3214 let
adamc@805	3215 fun iter (dts1, dts2, env) =
adamc@805	3216 case (dts1, dts2) of
adamc@805	3217 ([], []) => SOME env
adamc@805	3218 \| (dt1 :: dts1, dt2 :: dts2) =>
adamc@805	3219 (case found' (sgi1All, dt1, dt2, env) of
adamc@805	3220 NONE => NONE
adamc@805	3221 \| SOME env => iter (dts1, dts2, env))
adamc@805	3222 \| _ => NONE
adamc@805	3223 in
adamc@805	3224 iter (dts1, dts2, env)
adamc@805	3225 end
adamc@805	3226 in
adamc@805	3227 case sgi1 of
adamc@805	3228 L'.SgiDatatype dts1 => found dts1
adamc@805	3229 \| _ => NONE
adamc@805	3230 end)
adamc@805	3231 end
adamc@156	3232
adamc@191	3233 \| L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adam@1591	3234 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@158	3235 case sgi1 of
adamc@191	3236 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158	3237 if x = x' then
adamc@158	3238 let
adamc@158	3239 val k = (L'.KType, loc)
adamc@191	3240 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158	3241 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158	3242 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158	3243
adamc@158	3244 fun good () =
adamc@158	3245 let
adamc@191	3246 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191	3247 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158	3248 in
adamc@838	3249 cparts (n2, n1);
adamc@628	3250 SOME env
adamc@158	3251 end
adamc@158	3252 in
adamc@987	3253 (unifyCons env loc t1 t2;
adamc@628	3254 good ())
adamc@158	3255 handle CUnify (c1, c2, err) =>
adam@1591	3256 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, err));
adamc@158	3257 good ())
adamc@158	3258 end
adamc@158	3259 else
adamc@158	3260 NONE
adamc@158	3261
adamc@158	3262 \| _ => NONE)
adamc@156	3263
adamc@32	3264 \| L'.SgiVal (x, n2, c2) =>
adam@1591	3265 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@32	3266 case sgi1 of
adamc@41	3267 L'.SgiVal (x', n1, c1) =>
adamc@41	3268 if x = x' then
adamc@838	3269 ((*prefaces "val" [("x", PD.string x),
adamc@838	3270 ("n1", PD.string (Int.toString n1)),
adamc@838	3271 ("c1", p_con env c1),
adamc@838	3272 ("c2", p_con env c2),
adamc@838	3273 ("c2'", p_con env (sub2 c2))];*)
adamc@987	3274 unifyCons env loc c1 (sub2 c2);
adamc@628	3275 SOME env)
adamc@86	3276 handle CUnify (c1, c2, err) =>
adam@1591	3277 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, err));
adamc@628	3278 SOME env)
adamc@41	3279 else
adamc@41	3280 NONE
adamc@32	3281 \| _ => NONE)
adamc@32	3282
adamc@33	3283 \| L'.SgiStr (x, n2, sgn2) =>
adam@1591	3284 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@33	3285 case sgi1 of
adamc@41	3286 L'.SgiStr (x', n1, sgn1) =>
adamc@41	3287 if x = x' then
adamc@66	3288 let
adam@1591	3289 val () = subSgn' counterparts env loc sgn1 sgn2
adamc@66	3290 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66	3291 val env = if n1 = n2 then
adamc@66	3292 env
adamc@66	3293 else
adamc@66	3294 E.pushStrNamedAs env x n2
adamc@66	3295 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66	3296 sgn = sgn2})
adamc@66	3297 in
adamc@628	3298 SOME env
adamc@66	3299 end
adamc@41	3300 else
adamc@41	3301 NONE
adamc@33	3302 \| _ => NONE)
adamc@59	3303
adamc@59	3304 \| L'.SgiSgn (x, n2, sgn2) =>
adam@1591	3305 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@59	3306 case sgi1 of
adamc@59	3307 L'.SgiSgn (x', n1, sgn1) =>
adamc@59	3308 if x = x' then
adamc@65	3309 let
adam@1591	3310 val () = subSgn' counterparts env loc sgn1 sgn2
adam@1591	3311 val () = subSgn' counterparts env loc sgn2 sgn1
adamc@65	3312
adamc@65	3313 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65	3314 val env = if n1 = n2 then
adamc@65	3315 env
adamc@65	3316 else
adamc@838	3317 (cparts (n2, n1);
adamc@838	3318 E.pushSgnNamedAs env x n1 sgn2)
adamc@65	3319 in
adamc@628	3320 SOME env
adamc@65	3321 end
adamc@59	3322 else
adamc@59	3323 NONE
adamc@59	3324 \| _ => NONE)
adamc@88	3325
adamc@88	3326 \| L'.SgiConstraint (c2, d2) =>
adam@1591	3327 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@88	3328 case sgi1 of
adamc@88	3329 L'.SgiConstraint (c1, d1) =>
adamc@987	3330 if consEq env loc (c1, c2)
adamc@987	3331 andalso consEq env loc (d1, d2) then
adamc@628	3332 SOME env
adamc@88	3333 else
adamc@88	3334 NONE
adamc@88	3335 \| _ => NONE)
adamc@203	3336
adamc@563	3337 \| L'.SgiClassAbs (x, n2, k2) =>
adam@1591	3338 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3339 let
adamc@563	3340 fun found (x', n1, k1, co) =
adamc@211	3341 if x = x' then
adamc@211	3342 let
adamc@623	3343 val () = unifyKinds env k1 k2
adamc@563	3344 handle KUnify (k1, k2, err) =>
adam@1591	3345 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000	3346 sgi2All, k2, err))
adamc@563	3347
adamc@711	3348 val env = E.pushCNamedAs env x n1 k1 co
adamc@211	3349 in
adamc@211	3350 SOME (if n1 = n2 then
adamc@211	3351 env
adamc@211	3352 else
adamc@838	3353 (cparts (n2, n1);
adamc@838	3354 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211	3355 end
adamc@211	3356 else
adamc@211	3357 NONE
adamc@211	3358 in
adamc@211	3359 case sgi1 of
adamc@563	3360 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563	3361 \| L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211	3362 \| _ => NONE
adamc@211	3363 end)
adamc@563	3364 \| L'.SgiClass (x, n2, k2, c2) =>
adam@1591	3365 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3366 let
adamc@563	3367 fun found (x', n1, k1, c1) =
adamc@211	3368 if x = x' then
adamc@211	3369 let
adamc@623	3370 val () = unifyKinds env k1 k2
adamc@563	3371 handle KUnify (k1, k2, err) =>
adam@1591	3372 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000	3373 sgi2All, k2, err))
adamc@563	3374
adamc@838	3375 val c2 = sub2 c2
adamc@838	3376
adamc@218	3377 fun good () =
adamc@218	3378 let
adamc@711	3379 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218	3380 val env = if n1 = n2 then
adamc@218	3381 env
adamc@218	3382 else
adamc@839	3383 (cparts (n2, n1);
adamc@839	3384 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218	3385 in
adamc@628	3386 SOME env
adamc@218	3387 end
adamc@211	3388 in
adamc@987	3389 (unifyCons env loc c1 c2;
adamc@628	3390 good ())
adamc@211	3391 handle CUnify (c1, c2, err) =>
adam@1591	3392 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adamc@1000	3393 sgi2All, c2, err));
adamc@211	3394 good ())
adamc@211	3395 end
adamc@211	3396 else
adamc@211	3397 NONE
adamc@211	3398 in
adamc@211	3399 case sgi1 of
adamc@563	3400 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	3401 \| _ => NONE
adamc@211	3402 end)
adamc@31	3403 end
adamc@31	3404 in
adamc@628	3405 ignore (foldl folder env sgis2)
adamc@31	3406 end
adamc@31	3407
adamc@41	3408 \| (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43	3409 let
adamc@480	3410 val ran2 =
adamc@43	3411 if n1 = n2 then
adamc@480	3412 ran2
adamc@43	3413 else
adamc@480	3414 subStrInSgn (n2, n1) ran2
adamc@43	3415 in
adamc@1000	3416 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000	3417 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43	3418 end
adamc@41	3419
adamc@1000	3420 \| _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41	3421
adam@1580	3422 and subSgn env x y z = subSgn' (ref IM.empty) env x y z
adam@1580	3423 handle e as E.UnboundNamed _ => if ErrorMsg.anyErrors () then () else raise e
adamc@61	3424
adamc@706	3425 and positive self =
adamc@312	3426 let
adamc@312	3427 open L
adamc@312	3428
adamc@312	3429 fun none (c, _) =
adamc@312	3430 case c of
adamc@312	3431 CAnnot (c, _) => none c
adamc@312	3432
adamc@312	3433 \| TFun (c1, c2) => none c1 andalso none c2
adamc@312	3434 \| TCFun (_, _, _, c) => none c
adamc@312	3435 \| TRecord c => none c
adamc@312	3436
adamc@312	3437 \| CVar ([], x) => x <> self
adamc@312	3438 \| CVar _ => true
adamc@312	3439 \| CApp (c1, c2) => none c1 andalso none c2
adamc@312	3440 \| CAbs _ => false
adamc@628	3441 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3442
adamc@623	3443 \| CKAbs _ => false
adamc@623	3444 \| TKFun _ => false
adamc@623	3445
adamc@312	3446 \| CName _ => true
adamc@312	3447
adamc@312	3448 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312	3449 \| CConcat (c1, c2) => none c1 andalso none c2
adamc@621	3450 \| CMap => true
adamc@312	3451
adamc@312	3452 \| CUnit => true
adamc@312	3453
adamc@312	3454 \| CTuple cs => List.all none cs
adamc@312	3455 \| CProj (c, _) => none c
adamc@312	3456
adamc@312	3457 \| CWild _ => false
adamc@312	3458
adamc@312	3459 fun pos (c, _) =
adamc@312	3460 case c of
adamc@312	3461 CAnnot (c, _) => pos c
adamc@312	3462
adamc@312	3463 \| TFun (c1, c2) => none c1 andalso pos c2
adamc@312	3464 \| TCFun (_, _, _, c) => pos c
adamc@312	3465 \| TRecord c => pos c
adamc@312	3466
adamc@312	3467 \| CVar _ => true
adamc@312	3468 \| CApp (c1, c2) => pos c1 andalso none c2
adamc@312	3469 \| CAbs _ => false
adamc@628	3470 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3471
adamc@623	3472 \| CKAbs _ => false
adamc@623	3473 \| TKFun _ => false
adamc@623	3474
adamc@312	3475 \| CName _ => true
adamc@312	3476
adamc@312	3477 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312	3478 \| CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621	3479 \| CMap => true
adamc@312	3480
adamc@312	3481 \| CUnit => true
adamc@312	3482
adamc@312	3483 \| CTuple cs => List.all pos cs
adamc@312	3484 \| CProj (c, _) => pos c
adamc@312	3485
adamc@312	3486 \| CWild _ => false
adamc@312	3487 in
adamc@312	3488 pos
adamc@312	3489 end
adamc@312	3490
adamc@706	3491 and wildifyStr env (str, sgn) =
adamc@325	3492 case #1 (hnormSgn env sgn) of
adamc@325	3493 L'.SgnConst sgis =>
adamc@325	3494 (case #1 str of
adamc@325	3495 L.StrConst ds =>
adamc@325	3496 let
adamc@1270	3497 fun cname d =
adamc@1270	3498 case d of
adamc@1270	3499 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270	3500 \| L'.SgiConAbs (x, _, _) => SOME x
adamc@1270	3501 \| L'.SgiClass (x, _, _, _) => SOME x
adamc@1270	3502 \| L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270	3503 \| _ => NONE
adamc@1270	3504
adamc@1270	3505 fun dname (d, _) =
adamc@1270	3506 case d of
adamc@1270	3507 L.DCon (x, _, _) => SOME x
adamc@1270	3508 \| L.DClass (x, _, _) => SOME x
adamc@1270	3509 \| _ => NONE
adamc@1270	3510
adamc@493	3511 fun decompileKind (k, loc) =
adamc@493	3512 case k of
adamc@493	3513 L'.KType => SOME (L.KType, loc)
adamc@493	3514 \| L'.KArrow (k1, k2) =>
adamc@493	3515 (case (decompileKind k1, decompileKind k2) of
adamc@493	3516 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493	3517 \| _ => NONE)
adamc@493	3518 \| L'.KName => SOME (L.KName, loc)
adamc@493	3519 \| L'.KRecord k =>
adamc@493	3520 (case decompileKind k of
adamc@493	3521 SOME k => SOME (L.KRecord k, loc)
adamc@493	3522 \| _ => NONE)
adamc@493	3523 \| L'.KUnit => SOME (L.KUnit, loc)
adamc@493	3524 \| L'.KTuple ks =>
adamc@493	3525 let
adamc@493	3526 val ks' = List.mapPartial decompileKind ks
adamc@493	3527 in
adamc@493	3528 if length ks' = length ks then
adamc@493	3529 SOME (L.KTuple ks', loc)
adamc@493	3530 else
adamc@493	3531 NONE
adamc@493	3532 end
adamc@493	3533
adamc@493	3534 \| L'.KError => NONE
adam@1639	3535 \| L'.KUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adamc@493	3536 \| L'.KUnif _ => NONE
adam@1639	3537 \| L'.KTupleUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adam@1302	3538 \| L'.KTupleUnif _ => NONE
adamc@493	3539
adamc@623	3540 \| L'.KRel _ => NONE
adamc@623	3541 \| L'.KFun _ => NONE
adamc@623	3542
adam@1529	3543 fun maybeHnorm env c =
adam@1529	3544 hnormCon env c
adam@1529	3545 handle E.UnboundNamed _ => c
adam@1529	3546
adam@1529	3547 fun decompileCon env (c as (_, loc)) =
adam@1529	3548 case #1 (maybeHnorm env c) of
adamc@325	3549 L'.CRel i =>
adamc@325	3550 let
adamc@325	3551 val (s, _) = E.lookupCRel env i
adamc@325	3552 in
adamc@325	3553 SOME (L.CVar ([], s), loc)
adamc@325	3554 end
adamc@325	3555 \| L'.CNamed i =>
adamc@325	3556 let
adamc@325	3557 val (s, _, _) = E.lookupCNamed env i
adamc@325	3558 in
adamc@325	3559 SOME (L.CVar ([], s), loc)
adamc@325	3560 end
adamc@325	3561 \| L'.CModProj (m1, ms, x) =>
adamc@325	3562 let
adamc@325	3563 val (s, _) = E.lookupStrNamed env m1
adamc@325	3564 in
adamc@325	3565 SOME (L.CVar (s :: ms, x), loc)
adamc@325	3566 end
adamc@325	3567 \| L'.CName s => SOME (L.CName s, loc)
adamc@325	3568 \| L'.CRecord (_, xcs) =>
adamc@325	3569 let
adamc@325	3570 fun fields xcs =
adamc@325	3571 case xcs of
adamc@325	3572 [] => SOME []
adamc@325	3573 \| (x, t) :: xcs =>
adamc@325	3574 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325	3575 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325	3576 \| _ => NONE
adamc@325	3577 in
adamc@325	3578 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325	3579 (fields xcs)
adamc@325	3580 end
adamc@325	3581 \| L'.CConcat (c1, c2) =>
adamc@325	3582 (case (decompileCon env c1, decompileCon env c2) of
adamc@325	3583 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325	3584 \| _ => NONE)
adamc@325	3585 \| L'.CUnit => SOME (L.CUnit, loc)
adam@1639	3586 \| L'.CUnif (nl, _, _, _, ref (L'.Known c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325	3587
adam@1585	3588 \| L'.CApp (f, x) =>
adam@1585	3589 (case (decompileCon env f, decompileCon env x) of
adam@1585	3590 (SOME f, SOME x) => SOME (L.CApp (f, x), loc)
adam@1585	3591 \| _ => NONE)
adam@1585	3592
adam@1585	3593 \| c => (Print.preface ("WTF?", p_con env (c, loc)); NONE)
adamc@325	3594
adamc@1264	3595 fun buildNeeded env sgis =
adamc@1275	3596 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264	3597 (case sgi of
adam@1570	3598 L'.SgiCon (x, _, k, _) => naddCon (nd, x, k)
adam@1570	3599 \| L'.SgiConAbs (x, _, k) => naddCon (nd, x, k)
adamc@1264	3600 \| L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264	3601 \| L'.SgiVal (x, _, t) =>
adamc@1264	3602 let
adamc@1277	3603 fun should t =
adamc@1277	3604 let
adamc@1277	3605 val t = normClassConstraint env' t
adamc@1277	3606 in
adamc@1277	3607 case #1 t of
adamc@1277	3608 L'.CApp (f, _) => isClassOrFolder env' f
adamc@1277	3609 \| L'.TRecord t =>
adamc@1277	3610 (case hnormCon env' t of
adamc@1277	3611 (L'.CApp (f, _), _) =>
adamc@1277	3612 (case hnormCon env' f of
adamc@1277	3613 (L'.CApp (f, cl), loc) =>
adamc@1277	3614 (case hnormCon env' f of
adamc@1277	3615 (L'.CMap _, _) => isClassOrFolder env' cl
adamc@1277	3616 \| _ => false)
adamc@1277	3617 \| _ => false)
adamc@1277	3618 \| _ => false)
adamc@1277	3619 \| _ => false
adamc@1277	3620 end
adamc@1270	3621 in
adamc@1277	3622 if should t then
adamc@1277	3623 naddVal (nd, x)
adamc@1277	3624 else
adamc@1277	3625 nd
adamc@1264	3626 end
adamc@1264	3627 \| L'.SgiStr (x, _, s) =>
adamc@1270	3628 (case #1 (hnormSgn env' s) of
adamc@1270	3629 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264	3630 \| _ => nd)
adamc@1264	3631 \| _ => nd,
adamc@1275	3632 E.sgiBinds env' (sgi, loc)))
adamc@1275	3633 (nempty, env) sgis)
adamc@1264	3634
adamc@1264	3635 val nd = buildNeeded env sgis
adamc@1264	3636
adamc@1264	3637 fun removeUsed (nd, ds) =
adamc@1264	3638 foldl (fn ((d, _), nd) =>
adamc@634	3639 case d of
adamc@1264	3640 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264	3641 \| L.DClass (x, _, _) => ndelCon (nd, x)
adamc@1264	3642 \| L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264	3643 \| L.DOpen _ => nempty
adamc@1264	3644 \| L.DStr (x, _, (L.StrConst ds', _)) =>
adamc@1264	3645 (case SM.find (nmods nd, x) of
adamc@1264	3646 NONE => nd
adamc@1270	3647 \| SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264	3648 \| _ => nd)
adamc@1264	3649 nd ds
adamc@1264	3650
adamc@1264	3651 val nd = removeUsed (nd, ds)
adamc@1264	3652
adam@1662	3653 (* Among the declarations present explicitly in the program, find the last constructor or constraint declaration.
adam@1662	3654 * The new constructor/constraint declarations that we add may safely be put after that point. *)
adam@1662	3655 fun findLast (ds, acc) =
adam@1662	3656 case ds of
adam@1662	3657 [] => ([], acc)
adam@1662	3658 \| (d : L.decl) :: ds' =>
adam@1662	3659 let
adam@1662	3660 val isCony = case #1 d of
adam@1662	3661 L.DCon _ => true
adam@1662	3662 \| L.DDatatype _ => true
adam@1662	3663 \| L.DDatatypeImp _ => true
adam@1662	3664 \| L.DStr _ => true
adam@1662	3665 \| L.DConstraint _ => true
adam@1662	3666 \| L.DClass _ => true
adam@1662	3667 \| _ => false
adam@1662	3668 in
adam@1662	3669 if isCony then
adam@1662	3670 (ds, acc)
adam@1662	3671 else
adam@1662	3672 findLast (ds', d :: acc)
adam@1662	3673 end
adam@1662	3674
adam@1662	3675 val (dPrefix, dSuffix) = findLast (rev ds, [])
adam@1662	3676
adamc@1270	3677 fun extend (env, nd, ds) =
adamc@1264	3678 let
adamc@1264	3679 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264	3680 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264	3681 (SOME c1, SOME c2) =>
adamc@1264	3682 SOME (L.DConstraint (c1, c2), loc)
adam@1586	3683 \| _ => NONE) (nconstraints nd)
adamc@1264	3684
adamc@1264	3685 val ds' =
adamc@1264	3686 case SS.listItems (nvals nd) of
adamc@1264	3687 [] => ds'
adamc@1264	3688 \| xs =>
adamc@1264	3689 let
adamc@1264	3690 val ewild = (L.EWild, #2 str)
adamc@1264	3691 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264	3692 in
adamc@1264	3693 ds'' @ ds'
adamc@1264	3694 end
adamc@1264	3695
adamc@1275	3696 val ds' =
adam@1640	3697 case ncons nd of
adamc@1275	3698 [] => ds'
adamc@1264	3699 \| xs =>
adam@1570	3700 map (fn (x, k) =>
adamc@1270	3701 let
adamc@1270	3702 val k =
adamc@1270	3703 case decompileKind k of
adamc@1270	3704 NONE => (L.KWild, #2 str)
adamc@1270	3705 \| SOME k => k
adamc@1275	3706
adamc@1270	3707 val cwild = (L.CWild k, #2 str)
adamc@1270	3708 in
adam@1570	3709 (L.DCon (x, NONE, cwild), #2 str)
adamc@1275	3710 end) xs @ ds'
adamc@1275	3711
adamc@1275	3712 val ds = ds @ ds'
adamc@1264	3713 in
adamc@1270	3714 map (fn d as (L.DStr (x, s, (L.StrConst ds', loc')), loc) =>
adamc@1270	3715 (case SM.find (nmods nd, x) of
adamc@1270	3716 NONE => d
adamc@1270	3717 \| SOME (env, nd') =>
adamc@1270	3718 (L.DStr (x, s, (L.StrConst (extend (env, nd', ds')), loc')), loc))
adamc@1270	3719 \| d => d) ds
adamc@1264	3720 end
adamc@325	3721 in
adam@1662	3722 (L.StrConst (extend (env, nd, rev dPrefix) @ dSuffix), #2 str)
adamc@325	3723 end
adamc@325	3724 \| _ => str)
adamc@325	3725 \| _ => str
adamc@325	3726
adamc@706	3727 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255	3728 let
adamc@904	3729 (val () = preface ("elabDecl", SourcePrint.p_decl dAll))
adamc@514	3730 (val befor = Time.now ())
adamc@255	3731
adamc@255	3732 val r =
adamc@255	3733 case d of
adamc@255	3734 L.DCon (x, ko, c) =>
adamc@255	3735 let
adamc@255	3736 val k' = case ko of
adam@1639	3737 NONE => kunif env loc
adamc@623	3738 \| SOME k => elabKind env k
adamc@255	3739
adamc@255	3740 val (c', ck, gs') = elabCon (env, denv) c
adamc@255	3741 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255	3742 in
adamc@255	3743 checkKind env c' ck k';
adamc@255	3744
adamc@255	3745 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3746 end
adamc@805	3747 \| L.DDatatype dts =>
adamc@255	3748 let
adamc@255	3749 val k = (L'.KType, loc)
adamc@805	3750
adamc@805	3751 val (dts, env) = ListUtil.foldlMap
adamc@805	3752 (fn ((x, xs, xcs), env) =>
adamc@805	3753 let
adamc@805	3754 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	3755 val (env, n) = E.pushCNamed env x k' NONE
adamc@805	3756 in
adamc@805	3757 ((x, n, xs, xcs), env)
adamc@805	3758 end)
adamc@805	3759 env dts
adamc@805	3760
adamc@805	3761 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805	3762 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805	3763 let
adamc@805	3764 val t = (L'.CNamed n, loc)
adamc@805	3765 val nxs = length xs - 1
adamc@805	3766 val t = ListUtil.foldli
adamc@805	3767 (fn (i, _, t) =>
adamc@805	3768 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805	3769
adamc@805	3770 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805	3771 (E.pushCRel env' x k,
adamc@805	3772 D.enter denv')) (env, denv) xs
adamc@805	3773
adamc@805	3774 val (xcs, (used, env, gs')) =
adamc@805	3775 ListUtil.foldlMap
adamc@805	3776 (fn ((x, to), (used, env, gs)) =>
adamc@805	3777 let
adamc@805	3778 val (to, t, gs') = case to of
adamc@805	3779 NONE => (NONE, t, gs)
adamc@805	3780 \| SOME t' =>
adamc@805	3781 let
adamc@805	3782 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805	3783 in
adamc@805	3784 checkKind env' t' tk k;
adamc@805	3785 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805	3786 end
adamc@805	3787 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805	3788
adamc@805	3789 val (env, n') = E.pushENamed env x t
adamc@805	3790 in
adamc@805	3791 if SS.member (used, x) then
adamc@805	3792 strError env (DuplicateConstructor (x, loc))
adamc@805	3793 else
adamc@805	3794 ();
adamc@805	3795 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805	3796 end)
adamc@805	3797 (SS.empty, env, gs') xcs
adamc@805	3798 in
adamc@805	3799 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805	3800 end)
adamc@805	3801 (env, []) dts
adamc@255	3802 in
adamc@805	3803 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255	3804 end
adamc@255	3805
adamc@255	3806 \| L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255	3807
adamc@255	3808 \| L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255	3809 (case E.lookupStr env m1 of
adamc@255	3810 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255	3811 ([], (env, denv, gs)))
adamc@255	3812 \| SOME (n, sgn) =>
adamc@255	3813 let
adamc@255	3814 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255	3815 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255	3816 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255	3817 (strerror, sgnerror))
adamc@255	3818 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255	3819 ((L'.StrVar n, loc), sgn) ms
adamc@255	3820 in
adamc@628	3821 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628	3822 (L'.CModProj (n, ms, s), _) =>
adamc@255	3823 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255	3824 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255	3825 ([], (env, denv, gs)))
adamc@255	3826 \| SOME (xs, xncs) =>
adamc@255	3827 let
adamc@255	3828 val k = (L'.KType, loc)
adamc@255	3829 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255	3830 val t = (L'.CModProj (n, ms, s), loc)
adamc@255	3831 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255	3832 val env = E.pushDatatype env n' xs xncs
adamc@255	3833
adamc@255	3834 val t = (L'.CNamed n', loc)
adamc@844	3835 val nxs = length xs
adamc@844	3836 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844	3837 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844	3838 t xs
adamc@255	3839 val env = foldl (fn ((x, n, to), env) =>
adamc@255	3840 let
adamc@255	3841 val t = case to of
adamc@255	3842 NONE => t
adamc@255	3843 \| SOME t' => (L'.TFun (t', t), loc)
adamc@255	3844
adamc@255	3845 val t = foldr (fn (x, t) =>
adamc@255	3846 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255	3847 t xs
adamc@255	3848 in
adamc@255	3849 E.pushENamedAs env x n t
adamc@255	3850 end) env xncs
adamc@255	3851 in
adamc@628	3852 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255	3853 end)
adamc@255	3854 \| _ => (strError env (NotDatatype loc);
adamc@255	3855 ([], (env, denv, [])))
adamc@255	3856 end)
adamc@255	3857
adamc@255	3858 \| L.DVal (x, co, e) =>
adamc@255	3859 let
adamc@255	3860 val (c', _, gs1) = case co of
adam@1639	3861 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255	3862 \| SOME c => elabCon (env, denv) c
adamc@255	3863
adamc@255	3864 val (e', et, gs2) = elabExp (env, denv) e
adamc@629	3865
adamc@629	3866 val () = checkCon env e' et c'
adamc@629	3867
adamc@674	3868 val c' = normClassConstraint env c'
adamc@255	3869 val (env', n) = E.pushENamed env x c'
adamc@255	3870 in
adamc@255	3871 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362	3872 ("c'", p_con env c')];*)
adamc@628	3873 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255	3874 end
adamc@255	3875 \| L.DValRec vis =>
adamc@255	3876 let
adamc@255	3877 fun allowable (e, _) =
adamc@255	3878 case e of
adamc@255	3879 L.EAbs _ => true
adamc@255	3880 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	3881 \| L.EKAbs (_, e) => allowable e
adamc@255	3882 \| L.EDisjoint (_, _, e) => allowable e
adamc@255	3883 \| _ => false
adamc@255	3884
adamc@255	3885 val (vis, gs) = ListUtil.foldlMap
adamc@255	3886 (fn ((x, co, e), gs) =>
adamc@255	3887 let
adamc@255	3888 val (c', _, gs1) = case co of
adam@1639	3889 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255	3890 \| SOME c => elabCon (env, denv) c
adamc@674	3891 val c' = normClassConstraint env c'
adamc@255	3892 in
adamc@255	3893 ((x, c', e), enD gs1 @ gs)
adamc@280	3894 end) gs vis
adamc@255	3895
adamc@255	3896 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255	3897 let
adamc@255	3898 val (env, n) = E.pushENamed env x c'
adamc@255	3899 in
adamc@255	3900 ((x, n, c', e), env)
adamc@255	3901 end) env vis
adamc@255	3902
adamc@255	3903 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255	3904 let
adamc@255	3905 val (e', et, gs1) = elabExp (env, denv) e
adamc@255	3906 in
adamc@628	3907 checkCon env e' et c';
adamc@255	3908 if allowable e then
adamc@255	3909 ()
adamc@255	3910 else
adamc@255	3911 expError env (IllegalRec (x, e'));
adamc@628	3912 ((x, n, c', e'), gs1 @ gs)
adamc@255	3913 end) gs vis
adamc@255	3914 in
adamc@255	3915 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255	3916 end
adamc@255	3917
adamc@255	3918 \| L.DSgn (x, sgn) =>
adamc@255	3919 let
adamc@255	3920 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255	3921 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255	3922 in
adamc@255	3923 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3924 end
adamc@255	3925
adamc@255	3926 \| L.DStr (x, sgno, str) =>
adamc@255	3927 let
adamc@255	3928 val () = if x = "Basis" then
adamc@255	3929 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255	3930 else
adamc@255	3931 ()
adamc@255	3932
adamc@255	3933 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255	3934
adamc@255	3935 val (str', sgn', gs') =
adamc@255	3936 case formal of
adamc@255	3937 NONE =>
adamc@255	3938 let
adamc@255	3939 val (str', actual, gs') = elabStr (env, denv) str
adamc@255	3940 in
adamc@255	3941 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255	3942 end
adamc@255	3943 \| SOME (formal, gs1) =>
adamc@255	3944 let
adamc@325	3945 val str = wildifyStr env (str, formal)
adamc@255	3946 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255	3947 in
adamc@1000	3948 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255	3949 (str', formal, enD gs1 @ gs2)
adamc@255	3950 end
adamc@255	3951
adamc@255	3952 val (env', n) = E.pushStrNamed env x sgn'
adamc@834	3953 val denv' =
adamc@834	3954 case #1 str' of
adamc@834	3955 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022	3956 \| L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834	3957 \| _ => denv
adamc@255	3958 in
adamc@255	3959 case #1 (hnormSgn env sgn') of
adamc@255	3960 L'.SgnFun _ =>
adamc@255	3961 (case #1 str' of
adamc@255	3962 L'.StrFun _ => ()
adamc@255	3963 \| _ => strError env (FunctorRebind loc))
adamc@255	3964 \| _ => ();
adamc@834	3965 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255	3966 end
adamc@255	3967
adamc@255	3968 \| L.DFfiStr (x, sgn) =>
adamc@255	3969 let
adamc@255	3970 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255	3971
adamc@255	3972 val (env', n) = E.pushStrNamed env x sgn'
adamc@255	3973 in
adamc@255	3974 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3975 end
adamc@255	3976
adamc@255	3977 \| L.DOpen (m, ms) =>
adamc@255	3978 (case E.lookupStr env m of
adamc@255	3979 NONE => (strError env (UnboundStr (loc, m));
adamc@255	3980 ([], (env, denv, gs)))
adamc@255	3981 \| SOME (n, sgn) =>
adamc@255	3982 let
adamc@1030	3983 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030	3984 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030	3985 NONE => (strError env (UnboundStr (loc, m));
adamc@1030	3986 (strerror, sgnerror))
adamc@1030	3987 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030	3988 ((L'.StrVar n, loc), sgn) ms
adamc@1030	3989
adamc@1030	3990 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255	3991
adamc@628	3992 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628	3993 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255	3994 in
adamc@255	3995 (ds, (env', denv', gs))
adamc@255	3996 end)
adamc@255	3997
adamc@255	3998 \| L.DConstraint (c1, c2) =>
adamc@255	3999 let
adamc@255	4000 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255	4001 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255	4002 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255	4003
adamc@628	4004 val denv' = D.assert env denv (c1', c2')
adamc@255	4005 in
adam@1639	4006 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639	4007 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@255	4008
adamc@628	4009 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255	4010 end
adamc@255	4011
adamc@255	4012 \| L.DOpenConstraints (m, ms) =>
adamc@255	4013 let
adamc@255	4014 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255	4015 in
adamc@255	4016 ([], (env, denv, gs))
adamc@255	4017 end
adamc@255	4018
adamc@255	4019 \| L.DExport str =>
adamc@255	4020 let
adamc@255	4021 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255	4022
adamc@255	4023 val sgn =
adamc@255	4024 case #1 (hnormSgn env sgn) of
adamc@255	4025 L'.SgnConst sgis =>
adamc@255	4026 let
adamc@255	4027 fun doOne (all as (sgi, _), env) =
adamc@255	4028 (case sgi of
adamc@255	4029 L'.SgiVal (x, n, t) =>
adamc@325	4030 let
adamc@325	4031 fun doPage (makeRes, ran) =
adamc@628	4032 case hnormCon env ran of
adamc@628	4033 (L'.CApp (tf, arg), _) =>
adamc@628	4034 (case (hnormCon env tf, hnormCon env arg) of
adamc@628	4035 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720	4036 (L'.CApp (tf, arg3), _)) =>
adamc@325	4037 (case (basis = !basis_r,
adamc@720	4038 hnormCon env tf, hnormCon env arg3) of
adamc@325	4039 (true,
adamc@720	4040 (L'.CApp (tf, arg2), _),
adamc@628	4041 ((L'.CRecord (_, []), _))) =>
adamc@720	4042 (case (hnormCon env tf) of
adamc@720	4043 (L'.CApp (tf, arg1), _) =>
adamc@720	4044 (case (hnormCon env tf,
adamc@720	4045 hnormCon env arg1,
adamc@720	4046 hnormCon env arg2) of
adamc@720	4047 (tf, arg1,
adamc@720	4048 (L'.CRecord (_, []), _)) =>
adamc@720	4049 let
adamc@720	4050 val t = (L'.CApp (tf, arg1), loc)
adamc@720	4051 val t = (L'.CApp (t, arg2), loc)
adamc@720	4052 val t = (L'.CApp (t, arg3), loc)
adamc@720	4053 val t = (L'.CApp (
adamc@720	4054 (L'.CModProj
adamc@720	4055 (basis, [], "transaction"), loc),
adamc@325	4056 t), loc)
adam@1347	4057
adam@1347	4058 fun normArgs t =
adam@1347	4059 case hnormCon env t of
adam@1347	4060 (L'.TFun (dom, ran), loc) =>
adam@1347	4061 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347	4062 \| t' => t'
adamc@720	4063 in
adam@1347	4064 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720	4065 end
adamc@325	4066 \| _ => all)
adamc@325	4067 \| _ => all)
adamc@325	4068 \| _ => all)
adamc@325	4069 \| _ => all)
adamc@325	4070 \| _ => all
adamc@325	4071 in
adamc@628	4072 case hnormCon env t of
adamc@628	4073 (L'.TFun (dom, ran), _) =>
adamc@628	4074 (case hnormCon env dom of
adamc@628	4075 (L'.TRecord domR, _) =>
adamc@325	4076 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325	4077 loc),
adamc@325	4078 t), loc), ran)
adamc@325	4079 \| _ => all)
adamc@325	4080 \| _ => doPage (fn t => t, t)
adamc@325	4081 end
adamc@255	4082 \| _ => all,
adamc@255	4083 E.sgiBinds env all)
adamc@255	4084 in
adamc@255	4085 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255	4086 end
adamc@255	4087 \| _ => sgn
adamc@255	4088 in
adamc@255	4089 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255	4090 end
adamc@255	4091
adamc@707	4092 \| L.DTable (x, c, pe, ce) =>
adamc@255	4093 let
adamc@707	4094 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707	4095
adamc@255	4096 val (c', k, gs') = elabCon (env, denv) c
adam@1639	4097 val pkey = cunif env (loc, cstK)
adam@1639	4098 val uniques = cunif env (loc, cstK)
adamc@705	4099
adamc@705	4100 val ct = tableOf ()
adamc@705	4101 val ct = (L'.CApp (ct, c'), loc)
adamc@707	4102 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705	4103
adamc@705	4104 val (env, n) = E.pushENamed env x ct
adamc@707	4105 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707	4106 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707	4107
adamc@707	4108 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707	4109 val pst = (L'.CApp (pst, c'), loc)
adamc@707	4110 val pst = (L'.CApp (pst, pkey), loc)
adamc@704	4111
adamc@704	4112 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704	4113 val cst = (L'.CApp (cst, c'), loc)
adamc@705	4114 val cst = (L'.CApp (cst, uniques), loc)
adamc@255	4115 in
adamc@255	4116 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707	4117 checkCon env pe' pet pst;
adamc@707	4118 checkCon env ce' cet cst;
adamc@707	4119 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707	4120 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255	4121 end
adamc@338	4122 \| L.DSequence x =>
adamc@338	4123 let
adamc@338	4124 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338	4125 in
adamc@338	4126 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338	4127 end
adamc@754	4128 \| L.DView (x, e) =>
adamc@754	4129 let
adamc@754	4130 val (e', t, gs') = elabExp (env, denv) e
adamc@754	4131
adamc@754	4132 val k = (L'.KRecord (L'.KType, loc), loc)
adam@1639	4133 val fs = cunif env (loc, k)
adam@1639	4134 val ts = cunif env (loc, (L'.KRecord k, loc))
adamc@754	4135 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754	4136 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754	4137 val ts = (L'.CApp (tf, ts), loc)
adamc@754	4138
adamc@754	4139 val cv = viewOf ()
adamc@754	4140 val cv = (L'.CApp (cv, fs), loc)
adamc@754	4141 val (env', n) = E.pushENamed env x cv
adamc@754	4142
adamc@754	4143 val ct = queryOf ()
adamc@1191	4144 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395	4145 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754	4146 val ct = (L'.CApp (ct, ts), loc)
adamc@754	4147 val ct = (L'.CApp (ct, fs), loc)
adamc@754	4148 in
adamc@754	4149 checkCon env e' t ct;
adamc@754	4150 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754	4151 (env', denv, gs' @ gs))
adamc@754	4152 end
adamc@255	4153
adamc@563	4154 \| L.DClass (x, k, c) =>
adamc@255	4155 let
adamc@623	4156 val k = elabKind env k
adamc@280	4157 val (c', ck, gs') = elabCon (env, denv) c
adamc@711	4158 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255	4159 val env = E.pushClass env n
adamc@255	4160 in
adamc@711	4161 checkKind env c' ck k;
adamc@563	4162 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255	4163 end
adamc@271	4164
adamc@280	4165 \| L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280	4166
adamc@459	4167 \| L.DCookie (x, c) =>
adamc@459	4168 let
adamc@459	4169 val (c', k, gs') = elabCon (env, denv) c
adamc@459	4170 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459	4171 in
adamc@459	4172 checkKind env c' k (L'.KType, loc);
adamc@459	4173 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459	4174 end
adamc@720	4175 \| L.DStyle x =>
adamc@718	4176 let
adamc@720	4177 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718	4178 in
adamc@720	4179 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718	4180 end
adamc@1075	4181 \| L.DTask (e1, e2) =>
adamc@1073	4182 let
adamc@1075	4183 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075	4184 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075	4185
adam@1639	4186 val targ = cunif env (loc, (L'.KType, loc))
adam@1348	4187
adamc@1075	4188 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348	4189 val t1' = (L'.CApp (t1', targ), loc)
adam@1348	4190
adamc@1075	4191 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075	4192 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348	4193 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073	4194 in
adamc@1075	4195 checkCon env e1' t1 t1';
adamc@1075	4196 checkCon env e2' t2 t2';
adamc@1075	4197 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073	4198 end
adamc@1199	4199 \| L.DPolicy e1 =>
adamc@1199	4200 let
adamc@1199	4201 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199	4202
adamc@1199	4203 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199	4204 in
adamc@1199	4205 checkCon env e1' t1 t1';
adamc@1199	4206 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199	4207 end
adamc@459	4208
adam@1294	4209 \| L.DOnError (m1, ms, s) =>
adam@1294	4210 (case E.lookupStr env m1 of
adam@1294	4211 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294	4212 ([], (env, denv, [])))
adam@1294	4213 \| SOME (n, sgn) =>
adam@1294	4214 let
adam@1294	4215 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294	4216 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294	4217 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294	4218 (strerror, sgnerror))
adam@1294	4219 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294	4220 ((L'.StrVar n, loc), sgn) ms
adam@1294	4221
adam@1294	4222 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294	4223 NONE => (expError env (UnboundExp (loc, s));
adam@1294	4224 cerror)
adam@1294	4225 \| SOME t => t
adam@1294	4226
adam@1294	4227 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294	4228 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294	4229 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294	4230 in
adam@1407	4231 (unifyCons env loc t func
adam@1407	4232 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294	4233 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294	4234 end)
adam@1294	4235
adamc@280	4236 (val tcs = List.filter (fn TypeClass _ => true \| _ => false) (#3 (#2 r)))
adamc@255	4237 in
adamc@904	4238 (prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];)
adamc@255	4239 r
adamc@255	4240 end
adamc@211	4241
adamc@83	4242 and elabStr (env, denv) (str, loc) =
adamc@31	4243 case str of
adamc@31	4244 L.StrConst ds =>
adamc@31	4245 let
adamc@88	4246 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123	4247 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63	4248
adamc@63	4249 val (sgis, _, _, _, _) =
adamc@64	4250 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63	4251 case sgi of
adamc@64	4252 L'.SgiConAbs (x, n, k) =>
adamc@64	4253 let
adamc@64	4254 val (cons, x) =
adamc@64	4255 if SS.member (cons, x) then
adamc@64	4256 (cons, "?" ^ x)
adamc@64	4257 else
adamc@64	4258 (SS.add (cons, x), x)
adamc@64	4259 in
adamc@64	4260 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4261 end
adamc@64	4262 \| L'.SgiCon (x, n, k, c) =>
adamc@64	4263 let
adamc@64	4264 val (cons, x) =
adamc@64	4265 if SS.member (cons, x) then
adamc@64	4266 (cons, "?" ^ x)
adamc@64	4267 else
adamc@64	4268 (SS.add (cons, x), x)
adamc@64	4269 in
adamc@64	4270 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4271 end
adamc@805	4272 \| L'.SgiDatatype dts =>
adamc@156	4273 let
adamc@805	4274 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805	4275 let
adamc@805	4276 val (cons, x) =
adamc@805	4277 if SS.member (cons, x) then
adamc@805	4278 (cons, "?" ^ x)
adamc@156	4279 else
adamc@805	4280 (SS.add (cons, x), x)
adamc@805	4281
adamc@805	4282 val (xncs, vals) =
adamc@805	4283 ListUtil.foldlMap
adamc@805	4284 (fn ((x, n, t), vals) =>
adamc@805	4285 if SS.member (vals, x) then
adamc@805	4286 (("?" ^ x, n, t), vals)
adamc@805	4287 else
adamc@805	4288 ((x, n, t), SS.add (vals, x)))
adamc@805	4289 vals xncs
adamc@805	4290 in
adamc@805	4291 ((x, n, xs, xncs), (cons, vals))
adamc@805	4292 end
adamc@805	4293
adamc@805	4294 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156	4295 in
adamc@805	4296 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4297 end
adamc@191	4298 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156	4299 let
adamc@156	4300 val (cons, x) =
adamc@156	4301 if SS.member (cons, x) then
adamc@156	4302 (cons, "?" ^ x)
adamc@156	4303 else
adamc@156	4304 (SS.add (cons, x), x)
adamc@156	4305 in
adamc@191	4306 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4307 end
adamc@64	4308 \| L'.SgiVal (x, n, c) =>
adamc@64	4309 let
adamc@64	4310 val (vals, x) =
adamc@64	4311 if SS.member (vals, x) then
adamc@64	4312 (vals, "?" ^ x)
adamc@64	4313 else
adamc@64	4314 (SS.add (vals, x), x)
adamc@64	4315 in
adamc@64	4316 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4317 end
adamc@64	4318 \| L'.SgiSgn (x, n, sgn) =>
adamc@64	4319 let
adamc@64	4320 val (sgns, x) =
adamc@64	4321 if SS.member (sgns, x) then
adamc@64	4322 (sgns, "?" ^ x)
adamc@64	4323 else
adamc@64	4324 (SS.add (sgns, x), x)
adamc@64	4325 in
adamc@64	4326 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4327 end
adamc@64	4328
adamc@64	4329 \| L'.SgiStr (x, n, sgn) =>
adamc@64	4330 let
adamc@64	4331 val (strs, x) =
adamc@64	4332 if SS.member (strs, x) then
adamc@64	4333 (strs, "?" ^ x)
adamc@64	4334 else
adamc@64	4335 (SS.add (strs, x), x)
adamc@64	4336 in
adamc@64	4337 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88	4338 end
adamc@203	4339 \| L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563	4340 \| L'.SgiClassAbs (x, n, k) =>
adamc@211	4341 let
adamc@211	4342 val (cons, x) =
adamc@211	4343 if SS.member (cons, x) then
adamc@211	4344 (cons, "?" ^ x)
adamc@211	4345 else
adamc@211	4346 (SS.add (cons, x), x)
adamc@211	4347 in
adamc@563	4348 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211	4349 end
adamc@563	4350 \| L'.SgiClass (x, n, k, c) =>
adamc@211	4351 let
adamc@211	4352 val (cons, x) =
adamc@211	4353 if SS.member (cons, x) then
adamc@211	4354 (cons, "?" ^ x)
adamc@211	4355 else
adamc@211	4356 (SS.add (cons, x), x)
adamc@211	4357 in
adamc@563	4358 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203	4359 end)
adamc@64	4360
adamc@63	4361 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31	4362 in
adamc@83	4363 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31	4364 end
adamc@31	4365 \| L.StrVar x =>
adamc@31	4366 (case E.lookupStr env x of
adamc@31	4367 NONE =>
adamc@31	4368 (strError env (UnboundStr (loc, x));
adamc@83	4369 (strerror, sgnerror, []))
adamc@83	4370 \| SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34	4371 \| L.StrProj (str, x) =>
adamc@34	4372 let
adamc@83	4373 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34	4374 in
adamc@34	4375 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34	4376 NONE => (strError env (UnboundStr (loc, x));
adamc@83	4377 (strerror, sgnerror, []))
adamc@83	4378 \| SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34	4379 end
adamc@41	4380 \| L.StrFun (m, dom, ranO, str) =>
adamc@41	4381 let
adamc@83	4382 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	4383 val (env', n) = E.pushStrNamed env m dom'
adamc@834	4384 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834	4385 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41	4386
adamc@83	4387 val (formal, gs3) =
adamc@41	4388 case ranO of
adamc@83	4389 NONE => (actual, [])
adamc@41	4390 \| SOME ran =>
adamc@41	4391 let
adamc@834	4392 val (ran', gs) = elabSgn (env', denv') ran
adamc@41	4393 in
adamc@1000	4394 subSgn env' loc actual ran';
adamc@83	4395 (ran', gs)
adamc@41	4396 end
adamc@41	4397 in
adamc@41	4398 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83	4399 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228	4400 enD gs1 @ gs2 @ enD gs3)
adamc@41	4401 end
adamc@44	4402 \| L.StrApp (str1, str2) =>
adamc@44	4403 let
adamc@83	4404 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325	4405 val str2 =
adamc@325	4406 case sgn1 of
adamc@325	4407 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275	4408 let
adamc@1275	4409 val s = wildifyStr env (str2, dom)
adamc@1275	4410 in
adamc@1275	4411 (Print.preface ("Wild", SourcePrint.p_str s);)
adamc@1275	4412 s
adamc@1275	4413 end
adamc@325	4414 \| _ => str2
adamc@83	4415 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270	4416 in
adamc@44	4417 case #1 (hnormSgn env sgn1) of
adamc@83	4418 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4419 \| L'.SgnFun (m, n, dom, ran) =>
adamc@1000	4420 (subSgn env loc sgn2 dom;
adamc@44	4421 case #1 (hnormSgn env ran) of
adamc@83	4422 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4423 \| L'.SgnConst sgis =>
adamc@44	4424 ((L'.StrApp (str1', str2'), loc),
adamc@83	4425 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83	4426 gs1 @ gs2)
adamc@44	4427 \| _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44	4428 \| _ => (strError env (NotFunctor sgn1);
adamc@83	4429 (strerror, sgnerror, []))
adamc@44	4430 end
adamc@31	4431
adamc@987	4432 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833	4433
adamc@325	4434 fun elabFile basis topStr topSgn env file =
adamc@56	4435 let
adamc@713	4436 val () = mayDelay := true
adamc@713	4437 val () = delayedUnifs := []
adamc@830	4438 val () = delayedExhaustives := []
adamc@713	4439
adamc@83	4440 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83	4441 val () = case gs of
adamc@83	4442 [] => ()
adamc@207	4443 \| _ => (app (fn (_, env, _, c1, c2) =>
adamc@207	4444 prefaces "Unresolved"
adamc@207	4445 [("c1", p_con env c1),
adamc@207	4446 ("c2", p_con env c2)]) gs;
adamc@207	4447 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83	4448
adamc@56	4449 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210	4450 val () = basis_r := basis_n
adamc@56	4451
adamc@628	4452 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56	4453
adamc@56	4454 fun discoverC r x =
adamc@56	4455 case E.lookupC env' x of
adamc@56	4456 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56	4457 \| E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56	4458 \| E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56	4459
adamc@56	4460 val () = discoverC int "int"
adamc@56	4461 val () = discoverC float "float"
adamc@56	4462 val () = discoverC string "string"
adamc@821	4463 val () = discoverC char "char"
adamc@203	4464 val () = discoverC table "sql_table"
adamc@56	4465
adamc@325	4466 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325	4467 val () = case gs of
adamc@325	4468 [] => ()
adamc@325	4469 \| _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325	4470 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325	4471 val () = case gs of
adamc@325	4472 [] => ()
adamc@329	4473 \| _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329	4474 (case D.prove env denv (c1, c2, loc) of
adamc@329	4475 [] => ()
adamc@329	4476 \| _ =>
adamc@329	4477 (prefaces "Unresolved constraint in top.ur"
adamc@329	4478 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329	4479 ("c1", p_con env c1),
adamc@720	4480 ("c2", p_con env c2)];
adamc@478	4481 raise Fail "Unresolved constraint in top.ur"))
adamc@564	4482 \| TypeClass (env, c, r, loc) =>
adamc@564	4483 let
adamc@564	4484 val c = normClassKey env c
adamc@564	4485 in
adamc@833	4486 case resolveClass env c of
adamc@564	4487 SOME e => r := SOME e
adamc@564	4488 \| NONE => expError env (Unresolvable (loc, c))
adamc@634	4489 end) gs
adamc@564	4490
adamc@1000	4491 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720	4492
adamc@325	4493 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633	4494 val () = top_r := top_n
adamc@325	4495
adamc@628	4496 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325	4497
adamc@83	4498 fun elabDecl' (d, (env, gs)) =
adamc@76	4499 let
adamc@76	4500 val () = resetKunif ()
adamc@76	4501 val () = resetCunif ()
adam@1345	4502 val (ds, (env', _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76	4503 in
adam@1345	4504 (ds, (env', gs))
adamc@76	4505 end
adamc@76	4506
adam@1345	4507 val (file, (env'', gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753	4508
adamc@777	4509 fun oneSummaryRound () =
adamc@777	4510 if ErrorMsg.anyErrors () then
adamc@777	4511 ()
adamc@777	4512 else
adamc@777	4513 let
adamc@777	4514 val delayed = !delayedUnifs
adamc@777	4515 in
adamc@777	4516 delayedUnifs := [];
adamc@777	4517 app (fn (loc, env, k, s1, s2) =>
adamc@777	4518 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777	4519 delayed
adamc@777	4520 end
adam@1576	4521
adam@1576	4522 val checkConstraintErrors = ref (fn () => ())
adamc@56	4523 in
adamc@777	4524 oneSummaryRound ();
adamc@753	4525
adamc@753	4526 if ErrorMsg.anyErrors () then
adamc@753	4527 ()
adamc@753	4528 else
adamc@753	4529 let
adamc@753	4530 fun solver gs =
adamc@753	4531 let
adamc@753	4532 val (gs, solved) =
adamc@753	4533 ListUtil.foldlMapPartial
adamc@753	4534 (fn (g, solved) =>
adamc@753	4535 case g of
adamc@753	4536 Disjoint (loc, env, denv, c1, c2) =>
adamc@753	4537 (case D.prove env denv (c1, c2, loc) of
adamc@753	4538 [] => (NONE, true)
adamc@753	4539 \| _ => (SOME g, solved))
adamc@753	4540 \| TypeClass (env, c, r, loc) =>
adamc@753	4541 let
adamc@753	4542 fun default () = (SOME g, solved)
adamc@753	4543
adamc@753	4544 val c = normClassKey env c
adamc@753	4545 in
adamc@833	4546 case resolveClass env c of
adamc@753	4547 SOME e => (r := SOME e;
adamc@753	4548 (NONE, true))
adamc@753	4549 \| NONE =>
adamc@753	4550 case #1 (hnormCon env c) of
adamc@753	4551 L'.CApp (f, x) =>
adamc@753	4552 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753	4553 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753	4554 (case #1 (hnormCon env f) of
adamc@753	4555 L'.CModProj (top_n', [], "folder") =>
adamc@753	4556 if top_n' = top_n then
adamc@753	4557 let
adamc@753	4558 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753	4559 val e = (L'.EKApp (e, k), loc)
adamc@753	4560
adamc@753	4561 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753	4562 let
adamc@753	4563 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753	4564 "cons"), loc)
adamc@753	4565 val e = (L'.EKApp (e, k), loc)
adamc@753	4566 val e = (L'.ECApp (e,
adamc@753	4567 (L'.CRecord (k, xcs),
adamc@753	4568 loc)), loc)
adamc@753	4569 val e = (L'.ECApp (e, x), loc)
adamc@753	4570 val e = (L'.ECApp (e, c), loc)
adamc@753	4571 val e = (L'.EApp (e, folder), loc)
adamc@753	4572 in
adamc@753	4573 (e, (x, c) :: xcs)
adamc@753	4574 end)
adamc@753	4575 (e, []) xcs
adamc@753	4576 in
adamc@753	4577 (r := SOME folder;
adamc@753	4578 (NONE, true))
adamc@753	4579 end
adamc@753	4580 else
adamc@753	4581 default ()
adamc@753	4582 \| _ => default ())
adamc@753	4583 \| _ => default ())
adamc@753	4584 \| _ => default ()
adamc@753	4585 end)
adamc@753	4586 false gs
adamc@753	4587 in
adamc@753	4588 case (gs, solved) of
adamc@753	4589 ([], _) => ()
adamc@777	4590 \| (_, true) => (oneSummaryRound (); solver gs)
adamc@753	4591 \| _ =>
adam@1576	4592 checkConstraintErrors :=
adam@1576	4593 (fn () => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1576	4594 let
adam@1576	4595 val c1' = ElabOps.hnormCon env c1
adam@1576	4596 val c2' = ElabOps.hnormCon env c2
adam@1576	4597
adam@1576	4598 fun isUnif (c, _) =
adam@1576	4599 case c of
adam@1576	4600 L'.CUnif _ => true
adam@1576	4601 \| _ => false
adam@1576	4602
adam@1576	4603 fun maybeAttr (c, _) =
adam@1576	4604 case c of
adam@1576	4605 L'.CRecord ((L'.KType, _), xts) => true
adam@1576	4606 \| _ => false
adam@1576	4607 in
adam@1576	4608 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adam@1576	4609 eprefaces' [("Con 1", p_con env c1),
adam@1576	4610 ("Con 2", p_con env c2),
adam@1576	4611 ("Hnormed 1", p_con env c1'),
adam@1576	4612 ("Hnormed 2", p_con env c2')]
adam@1576	4613
adam@1576	4614 (*app (fn (loc, env, k, s1, s2) =>
adam@1576	4615 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1576	4616 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1576	4617 (!delayedUnifs);*)
adam@1576	4618 end
adam@1576	4619 \| TypeClass (env, c, r, loc) =>
adam@1576	4620 expError env (Unresolvable (loc, c)))
adam@1576	4621 gs)
adamc@753	4622 end
adamc@753	4623 in
adamc@753	4624 solver gs
adamc@753	4625 end;
adamc@753	4626
adamc@713	4627 mayDelay := false;
adamc@713	4628
adamc@777	4629 if ErrorMsg.anyErrors () then
adamc@777	4630 ()
adamc@777	4631 else
adamc@777	4632 (app (fn (loc, env, k, s1, s2) =>
adamc@777	4633 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777	4634 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adam@1582	4635 cunifyError env err;
adam@1582	4636 case !reducedSummaries of
adam@1582	4637 NONE => ()
adam@1582	4638 \| SOME (s1, s2) =>
adam@1582	4639 (ErrorMsg.errorAt loc "Stuck unifying these records after canceling matching pieces:";
adam@1582	4640 eprefaces' [("Have", s1),
adam@1582	4641 ("Need", s2)])))
adamc@777	4642 (!delayedUnifs);
adamc@777	4643 delayedUnifs := []);
adamc@713	4644
adam@1346	4645 if ErrorMsg.anyErrors () then
adam@1346	4646 ()
adam@1346	4647 else
adam@1584	4648 if List.exists kunifsInDecl file then
adam@1584	4649 case U.File.findDecl kunifsInDecl file of
adam@1584	4650 NONE => ()
adam@1584	4651 \| SOME d => declError env'' (KunifsRemain [d])
adam@1584	4652 else
adam@1584	4653 ();
adam@1345	4654
adam@1346	4655 if ErrorMsg.anyErrors () then
adam@1346	4656 ()
adam@1346	4657 else
adam@1584	4658 if List.exists cunifsInDecl file then
adam@1584	4659 case U.File.findDecl cunifsInDecl file of
adam@1584	4660 NONE => ()
adam@1584	4661 \| SOME d => declError env'' (CunifsRemain [d])
adam@1584	4662 else
adam@1584	4663 ();
adamc@750	4664
adamc@830	4665 if ErrorMsg.anyErrors () then
adamc@830	4666 ()
adamc@830	4667 else
adamc@837	4668 app (fn all as (env, _, _, loc) =>
adamc@830	4669 case exhaustive all of
adamc@830	4670 NONE => ()
adamc@830	4671 \| SOME p => expError env (Inexhaustive (loc, p)))
adamc@830	4672 (!delayedExhaustives);
adamc@830	4673
adam@1576	4674 if ErrorMsg.anyErrors () then
adam@1576	4675 ()
adam@1576	4676 else
adam@1576	4677 !checkConstraintErrors ();
adam@1576	4678
adamc@799	4679 (preface ("file", p_file env' file);)
adam@1531	4680
adam@1531	4681 if !dumpTypes then
adam@1531	4682 let
adam@1531	4683 open L'
adam@1531	4684 open Print.PD
adam@1531	4685 open Print
adam@1531	4686
adam@1531	4687 fun dumpDecl (d, env) =
adam@1531	4688 case #1 d of
adam@1531	4689 DCon (x, _, k, _) => (print (box [string x,
adam@1531	4690 space,
adam@1531	4691 string "::",
adam@1531	4692 space,
adam@1531	4693 p_kind env k,
adam@1531	4694 newline,
adam@1531	4695 newline]);
adam@1531	4696 E.declBinds env d)
adam@1531	4697 \| DVal (x, _, t, _) => (print (box [string x,
adam@1531	4698 space,
adam@1531	4699 string ":",
adam@1531	4700 space,
adam@1531	4701 p_con env t,
adam@1531	4702 newline,
adam@1531	4703 newline]);
adam@1531	4704 E.declBinds env d)
adam@1531	4705 \| DValRec vis => (app (fn (x, _, t, _) => print (box [string x,
adam@1531	4706 space,
adam@1531	4707 string ":",
adam@1531	4708 space,
adam@1531	4709 p_con env t,
adam@1531	4710 newline,
adam@1531	4711 newline])) vis;
adam@1531	4712 E.declBinds env d)
adam@1531	4713 \| DStr (x, _, _, str) => (print (box [string ("<" ^ x ^ ">"),
adam@1531	4714 newline,
adam@1531	4715 newline]);
adam@1531	4716 dumpStr (str, env);
adam@1531	4717 print (box [string ("</" ^ x ^ ">"),
adam@1531	4718 newline,
adam@1531	4719 newline]);
adam@1531	4720 E.declBinds env d)
adam@1531	4721 \| _ => E.declBinds env d
adam@1531	4722
adam@1531	4723 and dumpStr (str, env) =
adam@1531	4724 case #1 str of
adam@1531	4725 StrConst ds => ignore (foldl dumpDecl env ds)
adam@1531	4726 \| _ => ()
adam@1531	4727 in
adam@1531	4728 ignore (foldl dumpDecl env' file)
adam@1531	4729 end
adam@1531	4730 else
adam@1531	4731 ();
adam@1345	4732
adamc@325	4733 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325	4734 :: ds
adamc@325	4735 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325	4736 :: ds' @ file
adamc@56	4737 end
adamc@2	4738
adamc@2	4739 end

Mercurial > urweb

annotate src/elaborate.sml @ 1673:dae2c6fbf16c