Ur/Web: src/elaborate.sml annotate

annotate src/elaborate.sml @ 2272:b49d22a4eda8

Merge.

author	Ziv Scully <ziv@mit.edu>
date	Sat, 31 Oct 2015 23:35:42 -0400
parents	1ecef02f67c5
children	22117edf8fd3

rev	line source
adam@2044	1 (* Copyright (c) 2008-2014, 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@1745	42 val dumpTypesOnError = ref false
adam@1723	43 val unifyMore = ref false
adam@1733	44 val incremental = ref false
adam@1744	45 val verbose = ref false
adam@1531	46
adamc@819	47 structure IS = IntBinarySet
adamc@403	48 structure IM = IntBinaryMap
adamc@403	49
adamc@403	50 structure SK = struct
adamc@403	51 type ord_key = string
adamc@403	52 val compare = String.compare
adamc@403	53 end
adamc@403	54
adamc@403	55 structure SS = BinarySetFn(SK)
adamc@403	56 structure SM = BinaryMapFn(SK)
adamc@403	57
adamc@403	58 val basis_r = ref 0
adamc@633	59 val top_r = ref 0
adamc@403	60
adamc@403	61 fun elabExplicitness e =
adamc@403	62 case e of
adamc@403	63 L.Explicit => L'.Explicit
adamc@403	64 \| L.Implicit => L'.Implicit
adamc@403	65
adamc@403	66 fun occursKind r =
adamc@403	67 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403	68 \| _ => false)
adamc@403	69
adam@1639	70 fun validateCon env c =
adam@1639	71 (U.Con.appB {kind = fn env' => fn k => case k of
adam@1639	72 L'.KRel n => ignore (E.lookupKRel env' n)
adam@1639	73 \| L'.KUnif (_, _, r as ref (L'.KUnknown f)) =>
adam@1639	74 r := L'.KUnknown (fn k => f k andalso validateKind env' k)
adam@1639	75 \| _ => (),
adam@1639	76 con = fn env' => fn c => case c of
adam@1639	77 L'.CRel n => ignore (E.lookupCRel env' n)
adam@1639	78 \| L'.CNamed n => ignore (E.lookupCNamed env' n)
adam@1639	79 \| L'.CModProj (n, _, _) => ignore (E.lookupStrNamed env' n)
adam@1639	80 \| L'.CUnif (_, _, _, _, r as ref (L'.Unknown f)) =>
adam@1639	81 r := L'.Unknown (fn c => f c andalso validateCon env' c)
adam@1639	82 \| _ => (),
adam@1639	83 bind = fn (env', b) => case b of
adam@1639	84 U.Con.RelK x => E.pushKRel env' x
adam@1639	85 \| U.Con.RelC (x, k) => E.pushCRel env' x k
adam@1639	86 \| U.Con.NamedC (x, n, k, co) => E.pushCNamedAs env x n k co}
adam@1639	87 env c;
adam@1639	88 true)
adam@1639	89 handle _ => false
adam@1639	90
adam@1639	91 and validateKind env k = validateCon env (L'.CRecord (k, []), ErrorMsg.dummySpan)
adam@1639	92
adam@1719	93 exception KUnify' of E.env * kunify_error
adamc@403	94
adamc@623	95 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403	96 let
adam@1719	97 fun err f = raise KUnify' (env, f (k1All, k2All))
adamc@403	98 in
adamc@403	99 case (k1, k2) of
adamc@403	100 (L'.KType, L'.KType) => ()
adamc@403	101 \| (L'.KUnit, L'.KUnit) => ()
adamc@403	102
adamc@403	103 \| (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623	104 (unifyKinds' env d1 d2;
adamc@623	105 unifyKinds' env r1 r2)
adamc@403	106 \| (L'.KName, L'.KName) => ()
adamc@623	107 \| (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403	108 \| (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623	109 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403	110 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403	111
adamc@623	112 \| (L'.KRel n1, L'.KRel n2) =>
adamc@623	113 if n1 = n2 then
adamc@623	114 ()
adamc@623	115 else
adamc@623	116 err KIncompatible
adamc@623	117 \| (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623	118 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623	119
adamc@403	120 \| (L'.KError, _) => ()
adamc@403	121 \| (_, L'.KError) => ()
adamc@403	122
adam@1639	123 \| (L'.KUnif (_, _, ref (L'.KKnown k1All)), _) => unifyKinds' env k1All k2All
adam@1639	124 \| (_, L'.KUnif (_, _, ref (L'.KKnown k2All))) => unifyKinds' env k1All k2All
adam@1639	125
adam@1639	126 \| (L'.KTupleUnif (_, _, ref (L'.KKnown k)), _) => unifyKinds' env k k2All
adam@1639	127 \| (_, L'.KTupleUnif (_, _, ref (L'.KKnown k))) => unifyKinds' env k1All k
adam@1639	128
adam@1639	129 \| (L'.KUnif (_, _, r1 as ref (L'.KUnknown f1)), L'.KUnif (_, _, r2 as ref (L'.KUnknown f2))) =>
adamc@403	130 if r1 = r2 then
adamc@403	131 ()
adamc@403	132 else
adam@1639	133 (r1 := L'.KKnown k2All;
adam@1639	134 r2 := L'.KUnknown (fn x => f1 x andalso f2 x))
adam@1639	135
adam@1639	136 \| (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@403	137 if occursKind r k2All then
adamc@403	138 err KOccursCheckFailed
adam@1639	139 else if not (f k2All) then
adam@1639	140 err KScope
adamc@403	141 else
adam@1639	142 r := L'.KKnown k2All
adam@1639	143 \| (_, L'.KUnif (_, _, r as ref (L'.KUnknown f))) =>
adamc@403	144 if occursKind r k1All then
adamc@403	145 err KOccursCheckFailed
adam@1639	146 else if not (f k1All) then
adam@1639	147 err KScope
adamc@403	148 else
adam@1639	149 r := L'.KKnown k1All
adam@1639	150
adam@1639	151 \| (L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f)), L'.KTuple ks) =>
adam@1639	152 if not (f k2All) then
adam@1639	153 err KScope
adam@1639	154 else
adam@1639	155 ((app (fn (n, k) => unifyKinds' env k (List.nth (ks, n-1))) nks;
adam@1639	156 r := L'.KKnown k2All)
adam@1639	157 handle Subscript => err KIncompatible)
adam@1639	158 \| (L'.KTuple ks, L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f))) =>
adam@1639	159 if not (f k2All) then
adam@1639	160 err KScope
adam@1639	161 else
adam@1639	162 ((app (fn (n, k) => unifyKinds' env (List.nth (ks, n-1)) k) nks;
adam@1639	163 r := L'.KKnown k1All)
adam@1639	164 handle Subscript => err KIncompatible)
adam@1639	165 \| (L'.KTupleUnif (loc, nks1, r1 as ref (L'.KUnknown f1)), L'.KTupleUnif (_, nks2, r2 as ref (L'.KUnknown f2))) =>
adam@1302	166 let
adam@1302	167 val nks = foldl (fn (p as (n, k1), nks) =>
adam@1302	168 case ListUtil.search (fn (n', k2) =>
adam@1302	169 if n' = n then
adam@1302	170 SOME k2
adam@1302	171 else
adam@1302	172 NONE) nks2 of
adam@1302	173 NONE => p :: nks
adam@1302	174 \| SOME k2 => (unifyKinds' env k1 k2;
adam@1302	175 nks)) nks2 nks1
adam@1302	176
adam@1639	177 val k = (L'.KTupleUnif (loc, nks, ref (L'.KUnknown (fn x => f1 x andalso f2 x))), loc)
adam@1302	178 in
adam@1639	179 r1 := L'.KKnown k;
adam@1639	180 r2 := L'.KKnown k
adam@1302	181 end
adam@1302	182
adamc@403	183 \| _ => err KIncompatible
adamc@403	184 end
adamc@403	185
adam@1719	186 exception KUnify of L'.kind * L'.kind * E.env * kunify_error
adamc@403	187
adamc@623	188 fun unifyKinds env k1 k2 =
adamc@623	189 unifyKinds' env k1 k2
adam@1719	190 handle KUnify' (env', err) => raise KUnify (k1, k2, env', err)
adamc@403	191
adamc@403	192 fun checkKind env c k1 k2 =
adamc@623	193 unifyKinds env k1 k2
adam@1719	194 handle KUnify (k1, k2, env', err) =>
adam@1719	195 conError env (WrongKind (c, k1, k2, env', err))
adamc@403	196
adamc@403	197 val dummy = ErrorMsg.dummySpan
adamc@403	198
adamc@403	199 val ktype = (L'.KType, dummy)
adamc@403	200 val kname = (L'.KName, dummy)
adamc@403	201 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403	202
adamc@403	203 val cerror = (L'.CError, dummy)
adamc@403	204 val kerror = (L'.KError, dummy)
adamc@403	205 val eerror = (L'.EError, dummy)
adamc@403	206 val sgnerror = (L'.SgnError, dummy)
adamc@403	207 val strerror = (L'.StrError, dummy)
adamc@403	208
adamc@403	209 val int = ref cerror
adamc@403	210 val float = ref cerror
adamc@403	211 val string = ref cerror
adamc@821	212 val char = ref cerror
adamc@403	213 val table = ref cerror
adamc@403	214
adam@1639	215
adamc@403	216 local
adamc@403	217 val count = ref 0
adamc@403	218 in
adamc@403	219
adamc@403	220 fun resetKunif () = count := 0
adamc@403	221
adam@1639	222 fun kunif' f loc =
adamc@403	223 let
adamc@403	224 val n = !count
adamc@403	225 val s = if n <= 26 then
adamc@403	226 str (chr (ord #"A" + n))
adamc@403	227 else
adamc@403	228 "U" ^ Int.toString (n - 26)
adamc@403	229 in
adamc@403	230 count := n + 1;
adam@1639	231 (L'.KUnif (loc, s, ref (L'.KUnknown f)), loc)
adamc@403	232 end
adamc@403	233
adam@1639	234 fun kunif env = kunif' (validateKind env)
adam@1639	235
adamc@403	236 end
adamc@403	237
adamc@403	238 local
adamc@403	239 val count = ref 0
adamc@403	240 in
adamc@403	241
adamc@403	242 fun resetCunif () = count := 0
adamc@403	243
adam@1639	244 fun cunif' f (loc, k) =
adamc@403	245 let
adamc@403	246 val n = !count
adamc@712	247 val s = if n < 26 then
adamc@403	248 str (chr (ord #"A" + n))
adamc@403	249 else
adamc@403	250 "U" ^ Int.toString (n - 26)
adamc@403	251 in
adamc@403	252 count := n + 1;
adam@1639	253 (L'.CUnif (0, loc, k, s, ref (L'.Unknown f)), loc)
adamc@403	254 end
adamc@403	255
adam@1639	256 fun cunif env = cunif' (validateCon env)
adam@1639	257
adamc@403	258 end
adamc@403	259
adamc@623	260 fun elabKind env (k, loc) =
adamc@403	261 case k of
adamc@403	262 L.KType => (L'.KType, loc)
adamc@623	263 \| L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403	264 \| L.KName => (L'.KName, loc)
adamc@623	265 \| L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403	266 \| L.KUnit => (L'.KUnit, loc)
adamc@623	267 \| L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adam@1639	268 \| L.KWild => kunif env loc
adamc@403	269
adamc@623	270 \| L.KVar s => (case E.lookupK env s of
adamc@623	271 NONE =>
adamc@623	272 (kindError env (UnboundKind (loc, s));
adamc@623	273 kerror)
adamc@623	274 \| SOME n => (L'.KRel n, loc))
adamc@623	275 \| L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623	276
adamc@621	277 fun mapKind (dom, ran, loc)=
adamc@621	278 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621	279 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621	280 (L'.KRecord ran, loc)), loc)), loc)
adamc@403	281
adamc@403	282 fun hnormKind (kAll as (k, _)) =
adamc@403	283 case k of
adam@1639	284 L'.KUnif (_, _, ref (L'.KKnown k)) => hnormKind k
adamc@403	285 \| _ => kAll
adamc@403	286
adamc@623	287 open ElabOps
adamc@623	288
adam@1639	289 fun elabConHead env (c as (_, loc)) k =
adamc@623	290 let
adamc@623	291 fun unravel (k, c) =
adamc@623	292 case hnormKind k of
adamc@623	293 (L'.KFun (x, k'), _) =>
adamc@623	294 let
adam@1639	295 val u = kunif env loc
adamc@623	296
adamc@623	297 val k'' = subKindInKind (0, u) k'
adamc@623	298 in
adamc@623	299 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623	300 end
adamc@623	301 \| _ => (c, k)
adamc@623	302 in
adamc@623	303 unravel (k, c)
adamc@623	304 end
adamc@623	305
adamc@403	306 fun elabCon (env, denv) (c, loc) =
adamc@403	307 case c of
adamc@403	308 L.CAnnot (c, k) =>
adamc@403	309 let
adamc@623	310 val k' = elabKind env k
adamc@403	311 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	312 in
adamc@403	313 checkKind env c' ck k';
adamc@403	314 (c', k', gs)
adamc@403	315 end
adamc@403	316
adamc@403	317 \| L.TFun (t1, t2) =>
adamc@403	318 let
adamc@403	319 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403	320 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403	321 in
adamc@403	322 checkKind env t1' k1 ktype;
adamc@403	323 checkKind env t2' k2 ktype;
adamc@403	324 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403	325 end
adamc@403	326 \| L.TCFun (e, x, k, t) =>
adamc@403	327 let
adamc@403	328 val e' = elabExplicitness e
adamc@623	329 val k' = elabKind env k
adamc@403	330 val env' = E.pushCRel env x k'
adamc@403	331 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	332 in
adamc@403	333 checkKind env t' tk ktype;
adamc@403	334 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403	335 end
adamc@623	336 \| L.TKFun (x, t) =>
adamc@623	337 let
adamc@623	338 val env' = E.pushKRel env x
adamc@623	339 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	340 in
adamc@623	341 checkKind env t' tk ktype;
adamc@623	342 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623	343 end
adamc@628	344 \| L.TDisjoint (c1, c2, c) =>
adamc@403	345 let
adamc@403	346 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	347 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403	348
adam@1639	349 val ku1 = kunif env loc
adam@1639	350 val ku2 = kunif env loc
adamc@403	351
adamc@628	352 val denv' = D.assert env denv (c1', c2')
adamc@403	353 val (c', k, gs4) = elabCon (env, denv') c
adamc@403	354 in
adamc@403	355 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403	356 checkKind env c2' k2 (L'.KRecord ku2, loc);
adam@1351	357 checkKind env c' k (L'.KType, loc);
adamc@403	358
adamc@628	359 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403	360 end
adamc@403	361 \| L.TRecord c =>
adamc@403	362 let
adamc@403	363 val (c', ck, gs) = elabCon (env, denv) c
adamc@403	364 val k = (L'.KRecord ktype, loc)
adamc@403	365 in
adamc@403	366 checkKind env c' ck k;
adamc@403	367 ((L'.TRecord c', loc), ktype, gs)
adamc@403	368 end
adamc@403	369
adamc@403	370 \| L.CVar ([], s) =>
adamc@403	371 (case E.lookupC env s of
adamc@403	372 E.NotBound =>
adamc@403	373 (conError env (UnboundCon (loc, s));
adamc@403	374 (cerror, kerror, []))
adamc@403	375 \| E.Rel (n, k) =>
adamc@623	376 let
adam@1639	377 val (c, k) = elabConHead env (L'.CRel n, loc) k
adamc@623	378 in
adamc@623	379 (c, k, [])
adamc@623	380 end
adamc@403	381 \| E.Named (n, k) =>
adamc@623	382 let
adam@1639	383 val (c, k) = elabConHead env (L'.CNamed n, loc) k
adamc@623	384 in
adamc@623	385 (c, k, [])
adamc@623	386 end)
adamc@403	387 \| L.CVar (m1 :: ms, s) =>
adamc@403	388 (case E.lookupStr env m1 of
adamc@403	389 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403	390 (cerror, kerror, []))
adamc@403	391 \| SOME (n, sgn) =>
adamc@403	392 let
adamc@403	393 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	394 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	395 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403	396 (strerror, sgnerror))
adamc@403	397 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	398 ((L'.StrVar n, loc), sgn) ms
adamc@403	399
adam@1717	400 val (c, k) = case E.projectCon env {sgn = sgn, str = str, field = s} of
adam@1717	401 NONE => (conError env (UnboundCon (loc, s));
adam@1717	402 (cerror, kerror))
adam@1717	403 \| SOME (k, _) => elabConHead env (L'.CModProj (n, ms, s), loc) k
adamc@403	404 in
adamc@987	405 (c, k, [])
adamc@403	406 end)
adamc@403	407
adamc@403	408 \| L.CApp (c1, c2) =>
adamc@403	409 let
adamc@403	410 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	411 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639	412 val dom = kunif env loc
adam@1639	413 val ran = kunif env loc
adamc@403	414 in
adamc@403	415 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403	416 checkKind env c2' k2 dom;
adamc@403	417 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403	418 end
adamc@403	419 \| L.CAbs (x, ko, t) =>
adamc@403	420 let
adamc@403	421 val k' = case ko of
adam@1639	422 NONE => kunif env loc
adamc@623	423 \| SOME k => elabKind env k
adamc@403	424 val env' = E.pushCRel env x k'
adamc@403	425 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403	426 in
adamc@403	427 ((L'.CAbs (x, k', t'), loc),
adamc@403	428 (L'.KArrow (k', tk), loc),
adamc@403	429 gs)
adamc@403	430 end
adamc@623	431 \| L.CKAbs (x, t) =>
adamc@623	432 let
adamc@623	433 val env' = E.pushKRel env x
adamc@623	434 val (t', tk, gs) = elabCon (env', denv) t
adamc@623	435 in
adamc@623	436 ((L'.CKAbs (x, t'), loc),
adamc@623	437 (L'.KFun (x, tk), loc),
adamc@623	438 gs)
adamc@623	439 end
adamc@403	440
adamc@403	441 \| L.CName s =>
adamc@403	442 ((L'.CName s, loc), kname, [])
adamc@403	443
adamc@403	444 \| L.CRecord xcs =>
adamc@403	445 let
adam@1639	446 val k = kunif env loc
adamc@403	447
adamc@403	448 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403	449 let
adamc@403	450 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403	451 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403	452 in
adamc@403	453 checkKind env x' xk kname;
adamc@403	454 checkKind env c' ck k;
adamc@403	455 ((x', c'), gs1 @ gs2 @ gs)
adamc@403	456 end) [] xcs
adamc@403	457
adamc@403	458 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403	459 (* Add duplicate field checking later. *)
adamc@403	460
adamc@403	461 fun prove (xcs, ds) =
adamc@403	462 case xcs of
adamc@403	463 [] => ds
adamc@403	464 \| xc :: rest =>
adamc@403	465 let
adamc@403	466 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403	467 val ds = foldl (fn (xc', ds) =>
adamc@403	468 let
adamc@403	469 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403	470 in
adamc@403	471 D.prove env denv (r1, r2, loc) @ ds
adamc@403	472 end)
adamc@403	473 ds rest
adamc@403	474 in
adamc@403	475 prove (rest, ds)
adamc@403	476 end
adamc@403	477 in
adamc@403	478 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403	479 end
adamc@403	480 \| L.CConcat (c1, c2) =>
adamc@403	481 let
adamc@403	482 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403	483 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639	484 val ku = kunif env loc
adamc@403	485 val k = (L'.KRecord ku, loc)
adamc@403	486 in
adamc@403	487 checkKind env c1' k1 k;
adamc@403	488 checkKind env c2' k2 k;
adamc@403	489 ((L'.CConcat (c1', c2'), loc), k,
adamc@403	490 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403	491 end
adamc@621	492 \| L.CMap =>
adamc@403	493 let
adam@1639	494 val dom = kunif env loc
adam@1639	495 val ran = kunif env loc
adamc@403	496 in
adamc@621	497 ((L'.CMap (dom, ran), loc),
adamc@621	498 mapKind (dom, ran, loc),
adamc@403	499 [])
adamc@403	500 end
adamc@403	501
adamc@403	502 \| L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403	503
adamc@403	504 \| L.CTuple cs =>
adamc@403	505 let
adamc@403	506 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403	507 let
adamc@403	508 val (c', k, gs') = elabCon (env, denv) c
adamc@403	509 in
adamc@403	510 (c' :: cs', k :: ks, gs' @ gs)
adamc@403	511 end) ([], [], []) cs
adamc@403	512 in
adamc@403	513 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403	514 end
adamc@403	515 \| L.CProj (c, n) =>
adamc@403	516 let
adamc@403	517 val (c', k, gs) = elabCon (env, denv) c
adam@1302	518
adam@1639	519 val k' = kunif env loc
adamc@403	520 in
adam@1302	521 if n <= 0 then
adam@1302	522 (conError env (ProjBounds (c', n));
adam@1302	523 (cerror, kerror, []))
adam@1302	524 else
adam@1639	525 (checkKind env c' k (L'.KTupleUnif (loc, [(n, k')], ref (L'.KUnknown (validateKind env))), loc);
adam@1302	526 ((L'.CProj (c', n), loc), k', gs))
adamc@403	527 end
adamc@403	528
adamc@403	529 \| L.CWild k =>
adamc@403	530 let
adamc@623	531 val k' = elabKind env k
adamc@403	532 in
adam@1639	533 (cunif env (loc, k'), k', [])
adamc@403	534 end
adamc@403	535
adamc@403	536 fun kunifsRemain k =
adamc@403	537 case k of
adam@1639	538 L'.KUnif (_, _, ref (L'.KUnknown _)) => true
adam@1639	539 \| L'.KTupleUnif (_, _, ref (L'.KUnknown _)) => true
adamc@403	540 \| _ => false
adamc@403	541 fun cunifsRemain c =
adamc@403	542 case c of
adam@1639	543 L'.CUnif (_, loc, k, _, r as ref (L'.Unknown _)) =>
adam@1326	544 (case #1 (hnormKind k) of
adam@1639	545 L'.KUnit => (r := L'.Known (L'.CUnit, loc); false)
adam@1584	546 \| _ => true)
adam@1584	547 \| _ => false
adamc@403	548
adamc@403	549 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403	550 con = fn _ => false,
adamc@403	551 exp = fn _ => false,
adamc@403	552 sgn_item = fn _ => false,
adamc@403	553 sgn = fn _ => false,
adamc@403	554 str = fn _ => false,
adamc@403	555 decl = fn _ => false}
adamc@403	556
adam@1584	557 val cunifsInDecl = U.Decl.exists {kind = fn _ => false,
adamc@403	558 con = cunifsRemain,
adam@1584	559 exp = fn _ => false,
adam@1584	560 sgn_item = fn _ => false,
adam@1584	561 sgn = fn _ => false,
adam@1584	562 str = fn _ => false,
adam@1584	563 decl = fn _ => false}
adamc@403	564
adamc@403	565 fun occursCon r =
adamc@403	566 U.Con.exists {kind = fn _ => false,
adam@1303	567 con = fn L'.CUnif (_, _, _, _, r') => r = r'
adamc@403	568 \| _ => false}
adamc@403	569
adam@1719	570 exception CUnify' of E.env * cunify_error
adamc@403	571
adamc@403	572 type record_summary = {
adamc@403	573 fields : (L'.con * L'.con) list,
adam@1639	574 unifs : (L'.con * L'.cunif ref) list,
adamc@403	575 others : L'.con list
adamc@403	576 }
adamc@403	577
adamc@403	578 fun summaryToCon {fields, unifs, others} =
adamc@403	579 let
adam@1626	580 fun concat (c1, c2) =
adam@1626	581 case #1 c1 of
adam@1626	582 L'.CRecord (_, []) => c2
adam@1626	583 \| _ => case #1 c2 of
adam@1626	584 L'.CRecord (_, []) => c1
adam@1626	585 \| _ => (L'.CConcat (c1, c2), dummy)
adam@1626	586
adamc@403	587 val c = (L'.CRecord (ktype, []), dummy)
adam@1626	588 val c = List.foldr concat c others
adam@1626	589 val c = List.foldr (fn ((c', _), c) => concat (c', c)) c unifs
adamc@403	590 in
adam@1626	591 concat ((L'.CRecord (ktype, fields), dummy), c)
adamc@403	592 end
adamc@403	593
adamc@403	594 fun p_summary env s = p_con env (summaryToCon s)
adamc@403	595
adam@1719	596 exception CUnify of L'.con * L'.con * E.env * cunify_error
adamc@403	597
adamc@403	598 fun kindof env (c, loc) =
adamc@403	599 case c of
adamc@403	600 L'.TFun _ => ktype
adamc@403	601 \| L'.TCFun _ => ktype
adamc@403	602 \| L'.TRecord _ => ktype
adamc@628	603 \| L'.TDisjoint _ => ktype
adamc@403	604
adamc@403	605 \| L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403	606 \| L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403	607 \| L'.CModProj (n, ms, x) =>
adamc@403	608 let
adamc@403	609 val (_, sgn) = E.lookupStrNamed env n
adamc@403	610 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403	611 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403	612 NONE => raise Fail "kindof: Unknown substructure"
adamc@403	613 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403	614 ((L'.StrVar n, loc), sgn) ms
adamc@403	615 in
adamc@403	616 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403	617 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403	618 \| SOME (k, _) => k
adamc@403	619 end
adamc@403	620
adamc@403	621 \| L'.CApp (c, _) =>
adamc@403	622 (case hnormKind (kindof env c) of
adamc@403	623 (L'.KArrow (_, k), _) => k
adamc@403	624 \| (L'.KError, _) => kerror
adam@1719	625 \| k => raise CUnify' (env, CKindof (k, c, "arrow")))
adamc@403	626 \| L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628	627
adamc@403	628
adamc@403	629 \| L'.CName _ => kname
adamc@403	630
adamc@403	631 \| L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403	632 \| L'.CConcat (c, _) => kindof env c
adamc@621	633 \| L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403	634
adamc@403	635 \| L'.CUnit => (L'.KUnit, loc)
adamc@403	636
adamc@403	637 \| L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403	638 \| L'.CProj (c, n) =>
adamc@403	639 (case hnormKind (kindof env c) of
adamc@403	640 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adam@1311	641 \| (L'.KUnif (_, _, r), _) =>
adam@1311	642 let
adam@1639	643 val ku = kunif env loc
adam@1639	644 val k = (L'.KTupleUnif (loc, [(n, ku)], r), loc)
adam@1311	645 in
adam@1639	646 r := L'.KKnown k;
adam@1311	647 k
adam@1311	648 end
adam@1311	649 \| (L'.KTupleUnif (_, nks, r), _) =>
adam@1311	650 (case ListUtil.search (fn (n', k) => if n' = n then SOME k else NONE) nks of
adam@1311	651 SOME k => k
adam@1311	652 \| NONE =>
adam@1311	653 let
adam@1639	654 val ku = kunif env loc
adam@1639	655 val k = (L'.KTupleUnif (loc, ((n, ku) :: nks), r), loc)
adam@1311	656 in
adam@1639	657 r := L'.KKnown k;
adam@1311	658 k
adam@1311	659 end)
adam@1719	660 \| k => raise CUnify' (env, CKindof (k, c, "tuple")))
adamc@403	661
adamc@403	662 \| L'.CError => kerror
adam@1303	663 \| L'.CUnif (_, _, k, _, _) => k
adamc@403	664
adamc@623	665 \| L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623	666 \| L'.CKApp (c, k) =>
adamc@623	667 (case hnormKind (kindof env c) of
adamc@623	668 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adam@1719	669 \| k => raise CUnify' (env, CKindof (k, c, "kapp")))
adamc@623	670 \| L'.TKFun _ => ktype
adamc@403	671
adamc@621	672 exception GuessFailure
adamc@403	673
adamc@513	674 fun isUnitCon env (c, loc) =
adamc@513	675 case c of
adamc@513	676 L'.TFun _ => false
adamc@513	677 \| L'.TCFun _ => false
adamc@513	678 \| L'.TRecord _ => false
adamc@628	679 \| L'.TDisjoint _ => false
adamc@513	680
adam@1316	681 \| L'.CRel xn => #1 (hnormKind (#2 (E.lookupCRel env xn))) = L'.KUnit
adam@1316	682 \| L'.CNamed xn => #1 (hnormKind (#2 (E.lookupCNamed env xn))) = L'.KUnit
adamc@518	683 \| L'.CModProj (n, ms, x) => false
adamc@518	684 (*let
adamc@513	685 val (_, sgn) = E.lookupStrNamed env n
adamc@513	686 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513	687 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513	688 NONE => raise Fail "kindof: Unknown substructure"
adamc@513	689 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513	690 ((L'.StrVar n, loc), sgn) ms
adamc@513	691 in
adamc@513	692 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513	693 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513	694 \| SOME ((k, _), _) => k = L'.KUnit
adamc@518	695 end*)
adamc@518	696
adamc@518	697 \| L'.CApp (c, _) => false
adamc@518	698 (*(case hnormKind (kindof env c) of
adamc@513	699 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513	700 \| (L'.KError, _) => false
adamc@518	701 \| k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513	702 \| L'.CAbs _ => false
adamc@513	703
adamc@513	704 \| L'.CName _ => false
adamc@513	705
adamc@513	706 \| L'.CRecord _ => false
adamc@513	707 \| L'.CConcat _ => false
adamc@621	708 \| L'.CMap _ => false
adamc@513	709
adamc@513	710 \| L'.CUnit => true
adamc@513	711
adamc@513	712 \| L'.CTuple _ => false
adamc@518	713 \| L'.CProj (c, n) => false
adamc@518	714 (*(case hnormKind (kindof env c) of
adamc@513	715 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518	716 \| k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513	717
adamc@513	718 \| L'.CError => false
adam@1316	719 \| L'.CUnif (_, _, k, _, _) => #1 (hnormKind k) = L'.KUnit
adamc@513	720
adamc@623	721 \| L'.CKAbs _ => false
adamc@623	722 \| L'.CKApp _ => false
adamc@623	723 \| L'.TKFun _ => false
adamc@623	724
adamc@709	725 val recdCounter = ref 0
adamc@709	726
adamc@713	727 val mayDelay = ref false
adamc@777	728 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777	729
adamc@830	730 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830	731
adam@1304	732 exception CantSquish
adam@1304	733
adam@1304	734 fun squish by =
adam@1304	735 U.Con.mapB {kind = fn _ => fn k => k,
adam@1304	736 con = fn bound => fn c =>
adam@1304	737 case c of
adam@1304	738 L'.CRel xn =>
adam@1304	739 if xn < bound then
adam@1304	740 c
adam@1304	741 else if bound <= xn andalso xn < bound + by then
adam@1304	742 raise CantSquish
adam@1304	743 else
adam@1304	744 L'.CRel (xn - by)
adam@1304	745 \| L'.CUnif _ => raise CantSquish
adam@1304	746 \| _ => c,
adam@1304	747 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1304	748 \| (bound, _) => bound} 0
adam@1304	749
adam@1582	750 val reducedSummaries = ref (NONE : (Print.PD.pp_desc * Print.PD.pp_desc) option)
adam@1582	751
adamc@777	752 fun unifyRecordCons env (loc, c1, c2) =
adamc@403	753 let
adamc@403	754 fun rkindof c =
adamc@403	755 case hnormKind (kindof env c) of
adamc@403	756 (L'.KRecord k, _) => k
adamc@403	757 \| (L'.KError, _) => kerror
adam@1639	758 \| (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@753	759 let
adam@1639	760 val k = kunif' f (#2 c)
adamc@753	761 in
adam@1639	762 r := L'.KKnown (L'.KRecord k, #2 c);
adamc@753	763 k
adamc@753	764 end
adam@1719	765 \| k => raise CUnify' (env, CKindof (k, c, "record"))
adamc@403	766
adamc@403	767 val k1 = rkindof c1
adamc@403	768 val k2 = rkindof c2
adamc@403	769
adamc@628	770 val r1 = recordSummary env c1
adamc@628	771 val r2 = recordSummary env c2
adamc@403	772 in
adamc@623	773 unifyKinds env k1 k2;
adamc@777	774 unifySummaries env (loc, k1, r1, r2)
adamc@403	775 end
adamc@403	776
adamc@777	777 and normalizeRecordSummary env (r : record_summary) =
adamc@777	778 recordSummary env (summaryToCon r)
adamc@777	779
adamc@628	780 and recordSummary env c =
adamc@403	781 let
adamc@628	782 val c = hnormCon env c
adamc@628	783
adamc@628	784 val sum =
adamc@403	785 case c of
adam@2184	786 (L'.CRecord (_, xcs), _) => {fields = map (fn (x, c) => (hnormCon env x, hnormCon env c)) xcs,
adam@2184	787 unifs = [], others = []}
adamc@403	788 \| (L'.CConcat (c1, c2), _) =>
adamc@403	789 let
adamc@628	790 val s1 = recordSummary env c1
adamc@628	791 val s2 = recordSummary env c2
adamc@403	792 in
adamc@628	793 {fields = #fields s1 @ #fields s2,
adamc@628	794 unifs = #unifs s1 @ #unifs s2,
adamc@628	795 others = #others s1 @ #others s2}
adamc@403	796 end
adam@1639	797 \| (L'.CUnif (nl, _, _, _, ref (L'.Known c)), _) => recordSummary env (E.mliftConInCon nl c)
adam@1303	798 \| c' as (L'.CUnif (0, _, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628	799 \| c' => {fields = [], unifs = [], others = [c']}
adamc@403	800 in
adamc@628	801 sum
adamc@403	802 end
adamc@403	803
adamc@987	804 and consEq env loc (c1, c2) =
adamc@777	805 let
adamc@777	806 val mayDelay' = !mayDelay
adamc@777	807 in
adamc@777	808 (mayDelay := false;
adamc@987	809 unifyCons env loc c1 c2;
adamc@777	810 mayDelay := mayDelay';
adamc@777	811 true)
adamc@777	812 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777	813 end
adamc@403	814
adamc@403	815 and consNeq env (c1, c2) =
adamc@628	816 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403	817 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093	818 \| (L'.CName _, L'.CRel _) => true
adamc@1093	819 \| (L'.CRel _, L'.CName _) => true
adamc@1093	820 \| (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093	821 \| (L'.CRel _, L'.CNamed _) => true
adamc@1093	822 \| (L'.CNamed _, L'.CRel _) => true
adamc@1093	823 \| (L'.CRel _, L'.CModProj _) => true
adamc@1093	824 \| (L'.CModProj _, L'.CRel _) => true
adamc@1269	825 \| (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adam@1589	826 \| (L'.CModProj _, L'.CName _) => true
adam@1589	827 \| (L'.CName _, L'.CModProj _) => true
adam@1589	828 \| (L'.CNamed _, L'.CName _) => true
adam@1589	829 \| (L'.CName _, L'.CNamed _) => true
adamc@403	830 \| _ => false
adamc@403	831
adamc@777	832 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403	833 let
adam@1583	834 val () = reducedSummaries := NONE
adam@1583	835
adamc@848	836 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1303	837 ("#1", p_summary env s1),
adam@1303	838 ("#2", p_summary env s2)]*)
adamc@403	839
adamc@403	840 fun eatMatching p (ls1, ls2) =
adamc@403	841 let
adamc@403	842 fun em (ls1, ls2, passed1) =
adamc@403	843 case ls1 of
adamc@403	844 [] => (rev passed1, ls2)
adamc@403	845 \| h1 :: t1 =>
adamc@403	846 let
adamc@403	847 fun search (ls2', passed2) =
adamc@403	848 case ls2' of
adamc@403	849 [] => em (t1, ls2, h1 :: passed1)
adamc@403	850 \| h2 :: t2 =>
adamc@403	851 if p (h1, h2) then
adamc@403	852 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403	853 else
adamc@403	854 search (t2, h2 :: passed2)
adamc@403	855 in
adamc@403	856 search (ls2, [])
adamc@403	857 end
adamc@403	858 in
adamc@403	859 em (ls1, ls2, [])
adamc@403	860 end
adamc@403	861
adamc@403	862 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403	863 not (consNeq env (x1, x2))
adamc@987	864 andalso consEq env loc (c1, c2)
adamc@987	865 andalso consEq env loc (x1, x2))
adamc@403	866 (#fields s1, #fields s2)
adamc@403	867 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403	868 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646	869
adamc@403	870 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646	871
adam@1660	872 val hasUnifs = U.Con.exists {kind = fn _ => false,
adam@1660	873 con = fn L'.CUnif _ => true
adam@1660	874 \| _ => false}
adam@1657	875
adam@1657	876 val (others1, others2) = eatMatching (fn (c1, c2) =>
adam@1964	877 c1 = c2
adam@1964	878 orelse (not (hasUnifs c1 andalso hasUnifs c2)
adam@1964	879 andalso consEq env loc (c1, c2))) (#others s1, #others s2)
adamc@403	880 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403	881 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	882
adamc@709	883 fun unsummarize {fields, unifs, others} =
adamc@709	884 let
adamc@709	885 val c = (L'.CRecord (k, fields), loc)
adamc@709	886
adamc@709	887 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709	888 c unifs
adamc@709	889 in
adamc@709	890 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709	891 c others
adamc@709	892 end
adamc@709	893
adamc@710	894 val empties = ([], [], [], [], [], [])
adamc@710	895
adamc@709	896 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709	897 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adam@1639	898 orig as ([(_, r as ref (L'.Unknown f))], [], [], _, _, _) =>
adamc@709	899 let
adamc@709	900 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709	901 in
adam@1639	902 if occursCon r c orelse not (f c) then
adamc@709	903 orig
adamc@709	904 else
adam@1639	905 (r := L'.Known c;
adamc@710	906 empties)
adamc@709	907 end
adam@1639	908 \| orig as (_, _, _, [(_, r as ref (L'.Unknown f))], [], []) =>
adamc@709	909 let
adamc@709	910 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709	911 in
adam@1639	912 if occursCon r c orelse not (f c) then
adamc@709	913 orig
adamc@709	914 else
adam@1639	915 (r := L'.Known c;
adamc@710	916 empties)
adamc@709	917 end
adam@1639	918 \| orig as ([(_, r1 as ref (L'.Unknown f1))], _, [], [(_, r2 as ref (L'.Unknown f2))], _, []) =>
adamc@710	919 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710	920 let
adamc@838	921 val kr = (L'.KRecord k, loc)
adam@1639	922 val u = cunif env (loc, kr)
adam@1639	923
adam@1639	924 val c1 = (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc)
adam@1639	925 val c2 = (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc)
adamc@710	926 in
adam@1639	927 if not (f1 c1) orelse not (f2 c2) then
adam@1639	928 orig
adam@1639	929 else
adam@1639	930 (r1 := L'.Known c1;
adam@1639	931 r2 := L'.Known c2;
adam@1639	932 empties)
adamc@710	933 end
adamc@710	934 else
adamc@710	935 orig
adamc@709	936 \| orig => orig
adamc@709	937
adamc@403	938 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777	939 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	940
adamc@753	941 fun isGuessable (other, fs, unifs) =
adamc@753	942 let
adamc@753	943 val c = (L'.CRecord (k, fs), loc)
adamc@753	944 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753	945 in
adamc@987	946 (guessMap env loc (other, c, GuessFailure);
adamc@753	947 true)
adamc@753	948 handle GuessFailure => false
adamc@753	949 end
adamc@403	950
adamc@754	951 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753	952 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753	953 ([], _, [other1], [], [], _) =>
adamc@753	954 if isGuessable (other1, fs2, unifs2) then
adamc@754	955 ([], [], [], [], [], [])
adamc@403	956 else
adamc@754	957 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753	958 \| (_, [], [], [other2], _, []) =>
adamc@777	959 if isGuessable (other2, fs1, unifs1) then
adamc@777	960 ([], [], [], [], [], [])
adamc@777	961 else
adamc@777	962 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754	963 \| _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403	964
adam@1582	965 val () = if !mayDelay then
adam@1582	966 ()
adam@1582	967 else
adam@1626	968 let
adam@1626	969 val c1 = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1626	970 val c2 = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1626	971 in
adam@1626	972 case (c1, c2) of
adam@1626	973 ((L'.CRecord (_, []), _), (L'.CRecord (_, []), _)) => reducedSummaries := NONE
adam@1626	974 \| _ => reducedSummaries := SOME (p_con env c1, p_con env c2)
adam@1626	975 end
adam@1582	976
adamc@403	977 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646	978 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403	979
adamc@838	980 val empty = (L'.CRecord (k, []), loc)
adamc@1071	981 fun failure () =
adamc@1071	982 let
adamc@1071	983 val fs2 = #fields s2
adamc@1071	984
adamc@1071	985 fun findPointwise fs1 =
adamc@1071	986 case fs1 of
adamc@1071	987 [] => NONE
adamc@1071	988 \| (nm1, c1) :: fs1 =>
adamc@1071	989 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071	990 NONE => findPointwise fs1
adamc@1071	991 \| SOME (_, c2) =>
adamc@1071	992 if consEq env loc (c1, c2) then
adamc@1071	993 findPointwise fs1
adamc@1071	994 else
adam@1588	995 SOME (nm1, c1, c2, (unifyCons env loc c1 c2; NONE)
adam@1719	996 handle CUnify (_, _, env', err) => (reducedSummaries := NONE;
adam@1719	997 SOME (env', err)))
adamc@1071	998 in
adam@1719	999 raise CUnify' (env, CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071	1000 end
adam@1341	1001
adam@1341	1002 fun default () = if !mayDelay then
adam@1341	1003 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adam@1341	1004 else
adam@1341	1005 failure ()
adamc@709	1006 in
adamc@777	1007 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777	1008 (_, [], [], [], [], []) =>
adam@1639	1009 app (fn (_, r) => r := L'.Known empty) unifs1
adamc@777	1010 \| ([], [], [], _, [], []) =>
adam@1639	1011 app (fn (_, r) => r := L'.Known empty) unifs2
adam@1639	1012 \| (_, _, _, [], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)]) =>
adam@1341	1013 let
adam@1341	1014 val c = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1341	1015 in
adam@1341	1016 if occursCon r c then
adam@1588	1017 (reducedSummaries := NONE;
adam@1719	1018 raise CUnify' (env, COccursCheckFailed (cr, c)))
adam@1341	1019 else
adam@1639	1020 let
adam@1639	1021 val sq = squish nl c
adam@1639	1022 in
adam@1639	1023 if not (f sq) then
adam@1639	1024 default ()
adam@1639	1025 else
adam@1639	1026 r := L'.Known sq
adam@1639	1027 end
adam@1341	1028 handle CantSquish => default ()
adam@1341	1029 end
adam@1639	1030 \| ([], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)], _, _, _) =>
adam@1341	1031 let
adam@1341	1032 val c = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1341	1033 in
adam@1341	1034 if occursCon r c then
adam@1588	1035 (reducedSummaries := NONE;
adam@1719	1036 raise CUnify' (env, COccursCheckFailed (cr, c)))
adam@1341	1037 else
adam@1639	1038 let
adam@1639	1039 val sq = squish nl c
adam@1639	1040 in
adam@1639	1041 if not (f sq) then
adam@1639	1042 default ()
adam@1639	1043 else
adam@1639	1044 r := L'.Known sq
adam@1639	1045 end
adam@1341	1046 handle CantSquish => default ()
adam@1341	1047 end
adam@1341	1048 \| _ => default ())
adam@1341	1049
adamc@777	1050 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777	1051 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403	1052 end
adamc@403	1053
adamc@987	1054 and guessMap env loc (c1, c2, ex) =
adamc@403	1055 let
adamc@621	1056 fun unfold (dom, ran, f, r, c) =
adamc@403	1057 let
adamc@621	1058 fun unfold (r, c) =
adamc@754	1059 case #1 (hnormCon env c) of
adamc@987	1060 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628	1061 \| L'.CRecord (_, [(x, v)]) =>
adamc@628	1062 let
adamc@628	1063 val v' = case dom of
adamc@628	1064 (L'.KUnit, _) => (L'.CUnit, loc)
adam@1639	1065 \| _ => cunif env (loc, dom)
adamc@628	1066 in
adamc@987	1067 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987	1068 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628	1069 end
adamc@628	1070 \| L'.CRecord (_, (x, v) :: rest) =>
adamc@628	1071 let
adam@1639	1072 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639	1073 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628	1074 in
adamc@628	1075 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628	1076 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987	1077 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	1078 end
adamc@628	1079 \| L'.CConcat (c1', c2') =>
adamc@628	1080 let
adam@1639	1081 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639	1082 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628	1083 in
adamc@628	1084 unfold (r1, c1');
adamc@628	1085 unfold (r2, c2');
adamc@987	1086 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628	1087 end
adam@1639	1088 \| L'.CUnif (0, _, _, _, ur as ref (L'.Unknown rf)) =>
adam@1639	1089 let
adam@1639	1090 val c' = (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adam@1639	1091 in
adam@1639	1092 if not (rf c') then
adam@1639	1093 cunifyError env (CScope (c, c'))
adam@1639	1094 else
adam@1639	1095 ur := L'.Known c'
adam@1639	1096 end
adamc@628	1097 \| _ => raise ex
adamc@403	1098 in
adamc@621	1099 unfold (r, c)
adamc@403	1100 end
adamc@632	1101 handle _ => raise ex
adamc@403	1102 in
adamc@403	1103 case (#1 c1, #1 c2) of
adamc@621	1104 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621	1105 unfold (dom, ran, f, r, c2)
adamc@621	1106 \| (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621	1107 unfold (dom, ran, f, r, c1)
adamc@403	1108 \| _ => raise ex
adamc@403	1109 end
adamc@403	1110
adamc@987	1111 and unifyCons' env loc c1 c2 =
adamc@628	1112 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628	1113 ()
adamc@628	1114 else
adamc@403	1115 let
adamc@628	1116 (*val befor = Time.now ()
adamc@628	1117 val old1 = c1
adamc@628	1118 val old2 = c2*)
adamc@628	1119 val c1 = hnormCon env c1
adamc@628	1120 val c2 = hnormCon env c2
adamc@403	1121 in
adamc@987	1122 unifyCons'' env loc c1 c2
adamc@987	1123 handle ex => guessMap env loc (c1, c2, ex)
adamc@403	1124 end
adamc@628	1125
adamc@987	1126 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403	1127 let
adam@1719	1128 fun err f = raise CUnify' (env, f (c1All, c2All))
adamc@403	1129
adamc@706	1130 fun projSpecial1 (c1, n1, onFail) =
adamc@403	1131 let
adamc@632	1132 fun trySnd () =
adamc@632	1133 case #1 (hnormCon env c2All) of
adamc@632	1134 L'.CProj (c2, n2) =>
adamc@632	1135 let
adamc@632	1136 fun tryNormal () =
adamc@632	1137 if n1 = n2 then
adamc@987	1138 unifyCons' env loc c1 c2
adamc@632	1139 else
adamc@706	1140 onFail ()
adamc@632	1141 in
adamc@632	1142 case #1 (hnormCon env c2) of
adam@1639	1143 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632	1144 (case #1 (hnormKind k) of
adamc@632	1145 L'.KTuple ks =>
adamc@632	1146 let
adamc@632	1147 val loc = #2 c2
adam@1639	1148 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632	1149 in
adam@1639	1150 r := L'.Known (L'.CTuple us, loc);
adamc@987	1151 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632	1152 end
adamc@632	1153 \| _ => tryNormal ())
adamc@632	1154 \| _ => tryNormal ()
adamc@632	1155 end
adamc@706	1156 \| _ => onFail ()
adamc@403	1157 in
adamc@632	1158 case #1 (hnormCon env c1) of
adam@1639	1159 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632	1160 (case #1 (hnormKind k) of
adamc@632	1161 L'.KTuple ks =>
adamc@632	1162 let
adamc@632	1163 val loc = #2 c1
adam@1639	1164 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632	1165 in
adam@1639	1166 r := L'.Known (L'.CTuple us, loc);
adamc@987	1167 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632	1168 end
adamc@632	1169 \| _ => trySnd ())
adamc@632	1170 \| _ => trySnd ()
adamc@403	1171 end
adamc@632	1172
adamc@706	1173 fun projSpecial2 (c2, n2, onFail) =
adamc@706	1174 case #1 (hnormCon env c2) of
adam@1639	1175 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@706	1176 (case #1 (hnormKind k) of
adamc@706	1177 L'.KTuple ks =>
adamc@706	1178 let
adamc@706	1179 val loc = #2 c2
adam@1639	1180 val us = map (fn k => cunif' f (loc, k)) ks
adamc@706	1181 in
adam@1639	1182 r := L'.Known (L'.CTuple us, loc);
adamc@987	1183 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706	1184 end
adamc@706	1185 \| _ => onFail ())
adamc@706	1186 \| _ => onFail ()
adamc@706	1187
adamc@777	1188 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706	1189
adamc@706	1190 fun isRecord () =
adamc@706	1191 case (c1, c2) of
adamc@706	1192 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706	1193 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706	1194 \| _ => isRecord' ()
adam@2044	1195
adam@2044	1196 fun maybeIsRecord c =
adam@2044	1197 case c of
adam@2044	1198 L'.CRecord _ => isRecord ()
adam@2044	1199 \| L'.CConcat _ => isRecord ()
adam@2044	1200 \| _ => err COccursCheckFailed
adamc@706	1201 in
adam@1668	1202 (*eprefaces "unifyCons''" [("c1", p_con env c1All),
adam@1668	1203 ("c2", p_con env c2All)];*)
adam@1668	1204
adam@1668	1205 (case (c1, c2) of
adamc@706	1206 (L'.CError, _) => ()
adamc@706	1207 \| (_, L'.CError) => ()
adamc@403	1208
adam@1639	1209 \| (L'.CUnif (nl1, loc1, k1, _, r1 as ref (L'.Unknown f1)), L'.CUnif (nl2, loc2, k2, _, r2 as ref (L'.Unknown f2))) =>
adam@1668	1210 if r1 = r2 then
adam@1668	1211 if nl1 = nl2 then
adam@1668	1212 ()
adam@1668	1213 else
adam@1668	1214 err (fn _ => TooLifty (loc1, loc2))
adam@1303	1215 else if nl1 = 0 then
adamc@705	1216 (unifyKinds env k1 k2;
adam@1639	1217 if f1 c2All then
adam@1639	1218 r1 := L'.Known c2All
adam@1639	1219 else
adam@1639	1220 err CScope)
adam@1303	1221 else if nl2 = 0 then
adam@1303	1222 (unifyKinds env k1 k2;
adam@1639	1223 if f2 c1All then
adam@1639	1224 r2 := L'.Known c1All
adam@1639	1225 else
adam@1639	1226 err CScope)
adam@1303	1227 else
adam@1303	1228 err (fn _ => TooLifty (loc1, loc2))
adam@1303	1229
adam@2049	1230 \| (L'.CUnif (0, _, k1, _, r as ref (L'.Unknown f)), _) =>
adam@2049	1231 (unifyKinds env k1 (kindof env c2All);
adam@2049	1232 if occursCon r c2All then
adam@2049	1233 maybeIsRecord c2
adam@2049	1234 else if f c2All then
adam@2049	1235 r := L'.Known c2All
adam@2049	1236 else
adam@2049	1237 err CScope)
adam@2049	1238 \| (_, L'.CUnif (0, _, k2, _, r as ref (L'.Unknown f))) =>
adam@2049	1239 (unifyKinds env (kindof env c1All) k2;
adam@2049	1240 if occursCon r c1All then
adam@2049	1241 maybeIsRecord c1
adam@2049	1242 else if f c1All then
adam@2049	1243 r := L'.Known c1All
adam@2049	1244 else
adam@2049	1245 err CScope)
adam@2049	1246
adam@2049	1247 \| (L'.CUnif (nl, _, k1, _, r as ref (L'.Unknown f)), _) =>
adamc@705	1248 if occursCon r c2All then
adam@2044	1249 maybeIsRecord c2
adamc@705	1250 else
adam@2049	1251 (unifyKinds env k1 (kindof env c2All);
adam@2049	1252 let
adam@1639	1253 val sq = squish nl c2All
adam@1639	1254 in
adam@1639	1255 if f sq then
adam@1639	1256 r := L'.Known sq
adam@1639	1257 else
adam@1639	1258 err CScope
adam@1639	1259 end
adam@1639	1260 handle CantSquish => err (fn _ => TooDeep))
adam@2049	1261 \| (_, L'.CUnif (nl, _, k2, _, r as ref (L'.Unknown f))) =>
adamc@705	1262 if occursCon r c1All then
adam@2044	1263 maybeIsRecord c1
adamc@705	1264 else
adam@2049	1265 (unifyKinds env (kindof env c1All) k2;
adam@2049	1266 let
adam@1639	1267 val sq = squish nl c1All
adam@1639	1268 in
adam@1639	1269 if f sq then
adam@1639	1270 r := L'.Known sq
adam@1639	1271 else
adam@1639	1272 err CScope
adam@1639	1273 end
adam@1306	1274 handle CantSquish => err (fn _ => TooDeep))
adam@1304	1275
adam@2044	1276 \| (L'.CRecord _, _) => isRecord ()
adam@2044	1277 \| (_, L'.CRecord _) => isRecord ()
adam@2044	1278 \| (L'.CConcat _, _) => isRecord ()
adam@2044	1279 \| (_, L'.CConcat _) => isRecord ()
adam@2044	1280
adam@1341	1281
adamc@705	1282 \| (L'.CUnit, L'.CUnit) => ()
adamc@705	1283
adamc@705	1284 \| (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987	1285 (unifyCons' env loc d1 d2;
adam@1639	1286 unifyCons' env loc r1 r2)
adamc@705	1287 \| (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705	1288 if expl1 <> expl2 then
adamc@705	1289 err CExplicitness
adamc@705	1290 else
adamc@705	1291 (unifyKinds env d1 d2;
adamc@705	1292 let
adamc@705	1293 (val befor = Time.now ())
adamc@705	1294 val env' = E.pushCRel env x1 d1
adamc@705	1295 in
adamc@705	1296 (*TextIO.print ("E.pushCRel: "
adamc@705	1297 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705	1298 ^ "\n");*)
adamc@987	1299 unifyCons' env' loc r1 r2
adamc@705	1300 end)
adamc@987	1301 \| (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705	1302 \| (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987	1303 (unifyCons' env loc c1 c2;
adamc@987	1304 unifyCons' env loc d1 d2;
adamc@987	1305 unifyCons' env loc e1 e2)
adamc@705	1306
adamc@705	1307 \| (L'.CRel n1, L'.CRel n2) =>
adamc@705	1308 if n1 = n2 then
adamc@705	1309 ()
adamc@705	1310 else
adamc@705	1311 err CIncompatible
adamc@705	1312 \| (L'.CNamed n1, L'.CNamed n2) =>
adamc@705	1313 if n1 = n2 then
adamc@705	1314 ()
adamc@705	1315 else
adamc@705	1316 err CIncompatible
adamc@705	1317
adamc@705	1318 \| (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987	1319 (unifyCons' env loc d1 d2;
adamc@987	1320 unifyCons' env loc r1 r2)
adamc@705	1321 \| (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705	1322 (unifyKinds env k1 k2;
adamc@987	1323 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705	1324
adamc@705	1325 \| (L'.CName n1, L'.CName n2) =>
adamc@705	1326 if n1 = n2 then
adamc@705	1327 ()
adamc@705	1328 else
adamc@705	1329 err CIncompatible
adamc@705	1330
adamc@705	1331 \| (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705	1332 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705	1333 ()
adamc@705	1334 else
adamc@705	1335 err CIncompatible
adamc@705	1336
adamc@705	1337 \| (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987	1338 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705	1339 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705	1340
adamc@706	1341 \| (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706	1342 \| (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706	1343
adamc@623	1344 \| (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623	1345 (unifyKinds env dom1 dom2;
adamc@628	1346 unifyKinds env ran1 ran2)
adamc@623	1347
adamc@623	1348 \| (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987	1349 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623	1350 \| (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623	1351 (unifyKinds env k1 k2;
adamc@987	1352 unifyCons' env loc c1 c2)
adamc@623	1353 \| (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987	1354 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628	1355
adam@1668	1356 \| _ => err CIncompatible)(*;
adam@1668	1357 eprefaces "/unifyCons''" [("c1", p_con env c1All),
adam@1668	1358 ("c2", p_con env c2All)]*)
adamc@403	1359 end
adamc@403	1360
adamc@987	1361 and unifyCons env loc c1 c2 =
adamc@987	1362 unifyCons' env loc c1 c2
adam@1719	1363 handle CUnify' (env', err) => raise CUnify (c1, c2, env', err)
adam@1719	1364 \| KUnify (arg as {3 = env', ...}) => raise CUnify (c1, c2, env', CKind arg)
adamc@403	1365
adamc@628	1366 fun checkCon env e c1 c2 =
adamc@987	1367 unifyCons env (#2 e) c1 c2
adam@1719	1368 handle CUnify (c1, c2, env', err) =>
adam@1719	1369 expError env (Unify (e, c1, c2, env', err))
adamc@628	1370
adamc@628	1371 fun checkPatCon env p c1 c2 =
adamc@987	1372 unifyCons env (#2 p) c1 c2
adam@1719	1373 handle CUnify (c1, c2, env', err) =>
adam@1719	1374 expError env (PatUnify (p, c1, c2, env', err))
adamc@71	1375
adamc@403	1376 fun primType env p =
adamc@403	1377 case p of
adamc@403	1378 P.Int _ => !int
adamc@403	1379 \| P.Float _ => !float
adamc@403	1380 \| P.String _ => !string
adamc@821	1381 \| P.Char _ => !char
adamc@623	1382
adamc@403	1383 datatype constraint =
adamc@403	1384 Disjoint of D.goal
adamc@403	1385 \| TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403	1386
adam@1591	1387 fun relocConstraint loc c =
adam@1591	1388 case c of
adam@1591	1389 Disjoint (_, a, b, c, d) => Disjoint (loc, a, b, c, d)
adam@1591	1390 \| TypeClass (a, b, c, _) => TypeClass (a, b, c, loc)
adam@1591	1391
adamc@403	1392 val enD = map Disjoint
adamc@403	1393
adamc@634	1394 fun isClassOrFolder env cl =
adamc@634	1395 E.isClass env cl
adamc@634	1396 orelse case hnormCon env cl of
adamc@634	1397 (L'.CKApp (cl, _), _) =>
adamc@634	1398 (case hnormCon env cl of
adamc@634	1399 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634	1400 \| _ => false)
adamc@634	1401 \| _ => false
adamc@634	1402
adam@1303	1403 fun subConInCon env x y =
adam@1303	1404 ElabOps.subConInCon x y
adam@1303	1405 handle SubUnif => (cunifyError env (TooUnify (#2 x, y));
adam@1303	1406 cerror)
adam@1303	1407
adamc@629	1408 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403	1409 let
adamc@898	1410 fun unravelKind (t, e) =
adamc@898	1411 case hnormCon env t of
adamc@898	1412 (L'.TKFun (x, t'), _) =>
adamc@898	1413 let
adam@1639	1414 val u = kunif env loc
adamc@898	1415
adamc@898	1416 val t'' = subKindInCon (0, u) t'
adamc@898	1417 in
adamc@898	1418 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898	1419 end
adamc@898	1420 \| t => (e, t, [])
adamc@898	1421
adamc@403	1422 fun unravel (t, e) =
adamc@628	1423 case hnormCon env t of
adamc@628	1424 (L'.TKFun (x, t'), _) =>
adamc@628	1425 let
adam@1639	1426 val u = kunif env loc
adamc@628	1427
adamc@628	1428 val t'' = subKindInCon (0, u) t'
adamc@628	1429 in
adamc@628	1430 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628	1431 end
adamc@628	1432 \| (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628	1433 let
adam@1639	1434 val u = cunif env (loc, k)
adamc@628	1435
adam@1303	1436 val t'' = subConInCon env (0, u) t'
adamc@628	1437 in
adamc@628	1438 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628	1439 end
adamc@633	1440 \| (L'.TFun (dom, ran), _) =>
adamc@628	1441 let
adamc@633	1442 fun default () = (e, t, [])
adamc@750	1443
adamc@750	1444 fun isInstance () =
adamc@750	1445 if infer <> L.TypesOnly then
adamc@750	1446 let
adamc@750	1447 val r = ref NONE
adamc@750	1448 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750	1449 in
adamc@750	1450 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750	1451 end
adamc@750	1452 else
adamc@750	1453 default ()
adamc@750	1454
adamc@750	1455 fun hasInstance c =
adamc@753	1456 case hnormCon env c of
adamc@753	1457 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753	1458 con = fn c =>
adam@1767	1459 isClassOrFolder env (hnormCon env (c, loc))} c
adamc@753	1460 \| c =>
adamc@750	1461 let
adamc@753	1462 fun findHead c =
adamc@753	1463 case #1 c of
adamc@753	1464 L'.CApp (f, _) => findHead f
adamc@753	1465 \| _ => c
adamc@753	1466
adamc@753	1467 val cl = hnormCon env (findHead c)
adamc@750	1468 in
adamc@750	1469 isClassOrFolder env cl
adamc@750	1470 end
adamc@628	1471 in
adamc@750	1472 if hasInstance dom then
adamc@750	1473 isInstance ()
adamc@750	1474 else
adamc@750	1475 default ()
adamc@628	1476 end
adamc@629	1477 \| (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629	1478 if infer <> L.TypesOnly then
adamc@629	1479 let
adamc@792	1480 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629	1481 val (e, t, gs') = unravel (t', e)
adamc@629	1482 in
adamc@629	1483 (e, t, enD gs @ gs')
adamc@629	1484 end
adamc@629	1485 else
adamc@629	1486 (e, t, [])
adamc@628	1487 \| t => (e, t, [])
adam@1591	1488
adam@1591	1489 val (e, t, gs) = case infer of
adam@1591	1490 L.DontInfer => unravelKind (t, e)
adam@1591	1491 \| _ => unravel (t, e)
adamc@704	1492 in
adam@1591	1493 ((#1 e, loc), (#1 t, loc), map (relocConstraint loc) gs)
adamc@704	1494 end
adamc@15	1495
adamc@628	1496 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171	1497 let
adamc@171	1498 val perror = (L'.PWild, loc)
adamc@171	1499 val terror = (L'.CError, loc)
adamc@171	1500 val pterror = (perror, terror)
adamc@171	1501 val rerror = (pterror, (env, bound))
adamc@171	1502
adamc@191	1503 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188	1504 case (po, to) of
adamc@188	1505 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188	1506 rerror)
adamc@188	1507 \| (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188	1508 rerror)
adamc@191	1509 \| (NONE, NONE) =>
adamc@191	1510 let
adamc@191	1511 val k = (L'.KType, loc)
adam@1639	1512 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@191	1513 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191	1514 in
adamc@191	1515 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191	1516 (env, bound))
adamc@191	1517 end
adamc@188	1518 \| (SOME p, SOME t) =>
adamc@188	1519 let
adamc@628	1520 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191	1521
adamc@191	1522 val k = (L'.KType, loc)
adam@1639	1523 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@194	1524 val nxs = length unifs - 1
adam@1304	1525 val t = ListUtil.foldli (fn (i, u, t) => subConInCon env (nxs - i,
adam@1304	1526 E.mliftConInCon (nxs - i) u) t) t unifs
adamc@191	1527 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188	1528 in
adamc@628	1529 ignore (checkPatCon env p' pt t);
adamc@191	1530 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188	1531 (env, bound))
adamc@188	1532 end
adamc@171	1533 in
adamc@171	1534 case p of
adam@1639	1535 L.PWild => (((L'.PWild, loc), cunif env (loc, (L'.KType, loc))),
adamc@171	1536 (env, bound))
adamc@171	1537 \| L.PVar x =>
adamc@171	1538 let
adamc@171	1539 val t = if SS.member (bound, x) then
adamc@171	1540 (expError env (DuplicatePatternVariable (loc, x));
adamc@171	1541 terror)
adamc@171	1542 else
adam@1639	1543 cunif env (loc, (L'.KType, loc))
adamc@171	1544 in
adamc@182	1545 (((L'.PVar (x, t), loc), t),
adamc@171	1546 (E.pushERel env x t, SS.add (bound, x)))
adamc@171	1547 end
adamc@173	1548 \| L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173	1549 (env, bound))
adamc@171	1550 \| L.PCon ([], x, po) =>
adamc@171	1551 (case E.lookupConstructor env x of
adamc@174	1552 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171	1553 rerror)
adamc@191	1554 \| SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174	1555 \| L.PCon (m1 :: ms, x, po) =>
adamc@174	1556 (case E.lookupStr env m1 of
adamc@174	1557 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174	1558 rerror)
adamc@174	1559 \| SOME (n, sgn) =>
adamc@174	1560 let
adamc@174	1561 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174	1562 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182	1563 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174	1564 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174	1565 ((L'.StrVar n, loc), sgn) ms
adamc@174	1566 in
adamc@174	1567 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174	1568 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174	1569 rerror)
adamc@191	1570 \| SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174	1571 end)
adamc@174	1572
adamc@175	1573 \| L.PRecord (xps, flex) =>
adamc@175	1574 let
adamc@175	1575 val (xpts, (env, bound, _)) =
adamc@175	1576 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175	1577 let
adamc@628	1578 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175	1579 in
adamc@175	1580 if SS.member (fbound, x) then
adamc@175	1581 expError env (DuplicatePatField (loc, x))
adamc@175	1582 else
adamc@175	1583 ();
adamc@175	1584 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175	1585 end)
adamc@175	1586 (env, bound, SS.empty) xps
adamc@175	1587
adamc@175	1588 val k = (L'.KType, loc)
adamc@175	1589 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176	1590 val c =
adamc@175	1591 if flex then
adam@1639	1592 (L'.CConcat (c, cunif env (loc, (L'.KRecord k, loc))), loc)
adamc@175	1593 else
adamc@176	1594 c
adamc@175	1595 in
adamc@182	1596 (((L'.PRecord xpts, loc),
adamc@175	1597 (L'.TRecord c, loc)),
adamc@175	1598 (env, bound))
adamc@175	1599 end
adamc@822	1600
adamc@822	1601 \| L.PAnnot (p, t) =>
adamc@822	1602 let
adamc@822	1603 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822	1604 val (t', k, _) = elabCon (env, D.empty) t
adamc@822	1605 in
adamc@822	1606 checkPatCon env p' pt t';
adamc@822	1607 ((p', t'), (env, bound))
adamc@822	1608 end
adamc@171	1609 end
adamc@171	1610
adamc@819	1611 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819	1612 fun exhaustive (env, t, ps, loc) =
adamc@819	1613 let
adamc@819	1614 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819	1615
adamc@819	1616 fun patConNum pc =
adamc@819	1617 case pc of
adamc@819	1618 L'.PConVar n => n
adamc@819	1619 \| L'.PConProj (m1, ms, x) =>
adamc@819	1620 let
adamc@819	1621 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1622 in
adamc@819	1623 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819	1624 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1625 \| SOME (_, n, _, _, _) => n
adamc@819	1626 end
adamc@819	1627
adamc@819	1628 fun nameOfNum (t, n) =
adamc@819	1629 case t of
adamc@819	1630 L'.CModProj (m1, ms, x) =>
adamc@819	1631 let
adamc@819	1632 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1633 in
adamc@819	1634 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1635 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819	1636 \| SOME (_, cons) =>
adamc@819	1637 case ListUtil.search (fn (name, n', _) =>
adamc@819	1638 if n' = n then
adamc@819	1639 SOME name
adamc@819	1640 else
adamc@819	1641 NONE) cons of
adamc@819	1642 NONE => fail 9
adamc@819	1643 \| SOME name => L'.PConProj (m1, ms, name)
adamc@819	1644 end
adamc@819	1645 \| _ => L'.PConVar n
adamc@819	1646
adamc@819	1647 fun S (args, c, P) =
adamc@819	1648 List.mapPartial
adamc@819	1649 (fn [] => fail 1
adamc@819	1650 \| p1 :: ps =>
adamc@819	1651 let
adamc@819	1652 val loc = #2 p1
adamc@819	1653
adamc@819	1654 fun wild () =
adamc@819	1655 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819	1656 in
adamc@819	1657 case #1 p1 of
adamc@819	1658 L'.PPrim _ => NONE
adamc@819	1659 \| L'.PCon (_, c', _, NONE) =>
adamc@819	1660 if patConNum c' = c then
adamc@819	1661 SOME ps
adamc@819	1662 else
adamc@819	1663 NONE
adamc@819	1664 \| L'.PCon (_, c', _, SOME p) =>
adamc@819	1665 if patConNum c' = c then
adamc@819	1666 SOME (p :: ps)
adamc@819	1667 else
adamc@819	1668 NONE
adamc@819	1669 \| L'.PRecord xpts =>
adamc@819	1670 SOME (map (fn x =>
adamc@819	1671 case ListUtil.search (fn (x', p, _) =>
adamc@819	1672 if x = x' then
adamc@819	1673 SOME p
adamc@819	1674 else
adamc@819	1675 NONE) xpts of
adamc@819	1676 NONE => (L'.PWild, loc)
adamc@819	1677 \| SOME p => p) args @ ps)
adamc@819	1678 \| L'.PWild => wild ()
adamc@819	1679 \| L'.PVar _ => wild ()
adamc@819	1680 end)
adamc@819	1681 P
adamc@819	1682
adamc@819	1683 fun D P =
adamc@819	1684 List.mapPartial
adamc@819	1685 (fn [] => fail 2
adamc@819	1686 \| (p1, _) :: ps =>
adamc@819	1687 case p1 of
adamc@819	1688 L'.PWild => SOME ps
adamc@819	1689 \| L'.PVar _ => SOME ps
adamc@819	1690 \| L'.PPrim _ => NONE
adamc@819	1691 \| L'.PCon _ => NONE
adamc@819	1692 \| L'.PRecord _ => NONE)
adamc@819	1693 P
adamc@819	1694
adamc@819	1695 fun I (P, q) =
adamc@819	1696 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819	1697 ("q", p_list (p_con env) q)];*)
adamc@819	1698 case q of
adamc@819	1699 [] => (case P of
adamc@819	1700 [] => SOME []
adamc@819	1701 \| _ => NONE)
adamc@819	1702 \| q1 :: qs =>
adamc@819	1703 let
adamc@819	1704 val loc = #2 q1
adamc@819	1705
adamc@819	1706 fun unapp (t, acc) =
adamc@830	1707 case #1 t of
adamc@830	1708 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819	1709 \| _ => (t, rev acc)
adamc@819	1710
adamc@830	1711 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830	1712 val t1 = hnormCon env t1
adam@1303	1713 fun doSub t = foldl (fn (arg, t) => subConInCon env (0, arg) t) t args
adamc@819	1714
adamc@819	1715 fun dtype (dtO, names) =
adamc@819	1716 let
adamc@819	1717 val nameSet = IS.addList (IS.empty, names)
adamc@819	1718 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819	1719 case ps of
adamc@819	1720 [] => fail 4
adamc@819	1721 \| (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819	1722 (IS.delete (nameSet, patConNum pc)
adamc@819	1723 handle NotFound => nameSet)
adamc@819	1724 \| _ => nameSet)
adamc@819	1725 nameSet P
adamc@819	1726 in
adamc@819	1727 nameSet
adamc@819	1728 end
adamc@819	1729
adamc@819	1730 fun default () = (NONE, IS.singleton 0, [])
adamc@819	1731
adamc@819	1732 val (dtO, unused, cons) =
adamc@830	1733 case #1 t1 of
adamc@819	1734 L'.CNamed n =>
adamc@819	1735 let
adamc@819	1736 val dt = E.lookupDatatype env n
adamc@819	1737 val cons = E.constructors dt
adamc@819	1738 in
adamc@819	1739 (SOME dt,
adamc@819	1740 dtype (SOME dt, map #2 cons),
adamc@819	1741 map (fn (_, n, co) =>
adamc@819	1742 (n,
adamc@819	1743 case co of
adamc@819	1744 NONE => []
adamc@819	1745 \| SOME t => [("", doSub t)])) cons)
adamc@819	1746 end
adamc@819	1747 \| L'.CModProj (m1, ms, x) =>
adamc@819	1748 let
adamc@819	1749 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819	1750 in
adamc@819	1751 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819	1752 NONE => default ()
adamc@819	1753 \| SOME (_, cons) =>
adamc@819	1754 (NONE,
adamc@819	1755 dtype (NONE, map #2 cons),
adamc@819	1756 map (fn (s, _, co) =>
adamc@819	1757 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819	1758 case co of
adamc@819	1759 NONE => []
adamc@819	1760 \| SOME t => [("", doSub t)])) cons)
adamc@819	1761 end
adamc@830	1762 \| L'.TRecord t =>
adamc@830	1763 (case #1 (hnormCon env t) of
adamc@830	1764 L'.CRecord (_, xts) =>
adamc@830	1765 let
adamc@830	1766 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830	1767 \| _ => NONE) xts
adamc@830	1768 in
adamc@830	1769 if List.all Option.isSome xts then
adamc@830	1770 let
adamc@830	1771 val xts = List.mapPartial (fn x => x) xts
adamc@830	1772 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830	1773 String.compare (x1, x2) = GREATER) xts
adamc@830	1774 in
adamc@830	1775 (NONE, IS.empty, [(0, xts)])
adamc@830	1776 end
adamc@830	1777 else
adamc@830	1778 default ()
adamc@830	1779 end
adamc@830	1780 \| _ => default ())
adamc@819	1781 \| _ => default ()
adamc@819	1782 in
adamc@819	1783 if IS.isEmpty unused then
adamc@819	1784 let
adamc@819	1785 fun recurse cons =
adamc@819	1786 case cons of
adamc@819	1787 [] => NONE
adamc@819	1788 \| (name, args) :: cons =>
adamc@819	1789 case I (S (map #1 args, name, P),
adamc@819	1790 map #2 args @ qs) of
adamc@819	1791 NONE => recurse cons
adamc@819	1792 \| SOME ps =>
adamc@819	1793 let
adamc@819	1794 val nargs = length args
adamc@819	1795 val argPs = List.take (ps, nargs)
adamc@819	1796 val restPs = List.drop (ps, nargs)
adamc@819	1797
adamc@819	1798 val p = case name of
adamc@819	1799 0 => L'.PRecord (ListPair.map
adamc@819	1800 (fn ((name, t), p) => (name, p, t))
adamc@819	1801 (args, argPs))
adamc@830	1802 \| _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819	1803 case argPs of
adamc@819	1804 [] => NONE
adamc@819	1805 \| [p] => SOME p
adamc@819	1806 \| _ => fail 3)
adamc@819	1807 in
adamc@819	1808 SOME ((p, loc) :: restPs)
adamc@819	1809 end
adamc@819	1810 in
adamc@819	1811 recurse cons
adamc@819	1812 end
adamc@819	1813 else
adamc@819	1814 case I (D P, qs) of
adamc@819	1815 NONE => NONE
adamc@819	1816 \| SOME ps =>
adamc@819	1817 let
adamc@819	1818 val p = case cons of
adamc@819	1819 [] => L'.PWild
adamc@819	1820 \| (0, _) :: _ => L'.PWild
adamc@819	1821 \| _ =>
adamc@819	1822 case IS.find (fn _ => true) unused of
adamc@819	1823 NONE => fail 6
adamc@819	1824 \| SOME name =>
adamc@819	1825 case ListUtil.search (fn (name', args) =>
adamc@819	1826 if name = name' then
adamc@819	1827 SOME (name', args)
adamc@819	1828 else
adamc@819	1829 NONE) cons of
adamc@819	1830 SOME (n, []) =>
adamc@830	1831 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819	1832 \| SOME (n, [_]) =>
adamc@830	1833 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819	1834 \| _ => fail 7
adamc@819	1835 in
adamc@819	1836 SOME ((p, loc) :: ps)
adamc@819	1837 end
adamc@819	1838 end
adamc@819	1839 in
adamc@819	1840 case I (map (fn x => [x]) ps, [t]) of
adamc@819	1841 NONE => NONE
adamc@819	1842 \| SOME [p] => SOME p
adamc@819	1843 \| _ => fail 7
adamc@819	1844 end
adamc@819	1845
adamc@217	1846 fun unmodCon env (c, loc) =
adamc@217	1847 case c of
adamc@217	1848 L'.CNamed n =>
adamc@217	1849 (case E.lookupCNamed env n of
adamc@217	1850 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1851 \| _ => (c, loc))
adamc@217	1852 \| L'.CModProj (m1, ms, x) =>
adamc@217	1853 let
adamc@217	1854 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217	1855 in
adamc@217	1856 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217	1857 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217	1858 \| SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217	1859 \| _ => (c, loc)
adamc@217	1860 end
adamc@217	1861 \| _ => (c, loc)
adamc@217	1862
adamc@721	1863 fun normClassKey env c =
adamc@467	1864 let
adamc@721	1865 val c = hnormCon env c
adamc@467	1866 in
adamc@467	1867 case #1 c of
adamc@467	1868 L'.CApp (c1, c2) =>
adamc@467	1869 let
adamc@721	1870 val c1 = normClassKey env c1
adamc@721	1871 val c2 = normClassKey env c2
adamc@467	1872 in
adamc@467	1873 (L'.CApp (c1, c2), #2 c)
adamc@467	1874 end
adamc@721	1875 \| L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721	1876 normClassKey env c)) xcs), #2 c)
adamc@721	1877 \| _ => unmodCon env c
adamc@467	1878 end
adamc@467	1879
adamc@467	1880 fun normClassConstraint env (c, loc) =
adamc@217	1881 case c of
adamc@217	1882 L'.CApp (f, x) =>
adamc@217	1883 let
adamc@721	1884 val f = normClassKey env f
adamc@467	1885 val x = normClassKey env x
adamc@217	1886 in
adamc@467	1887 (L'.CApp (f, x), loc)
adamc@217	1888 end
adamc@674	1889 \| L'.TFun (c1, c2) =>
adamc@674	1890 let
adamc@674	1891 val c1 = normClassConstraint env c1
adamc@674	1892 val c2 = normClassConstraint env c2
adamc@674	1893 in
adamc@674	1894 (L'.TFun (c1, c2), loc)
adamc@674	1895 end
adamc@674	1896 \| L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adam@1639	1897 \| L'.CUnif (nl, _, _, _, ref (L'.Known c)) => normClassConstraint env (E.mliftConInCon nl c)
adamc@721	1898 \| _ => unmodCon env (c, loc)
adamc@216	1899
adamc@1093	1900 fun findHead e e' =
adamc@1093	1901 let
adamc@1093	1902 fun findHead (e, _) =
adamc@1093	1903 case e of
adamc@1093	1904 L.EVar (_, _, infer) =>
adamc@1093	1905 let
adamc@1093	1906 fun findHead' (e, _) =
adamc@1093	1907 case e of
adamc@1093	1908 L'.ENamed _ => true
adamc@1093	1909 \| L'.EModProj _ => true
adam@1472	1910 \| L'.ERel _ => true
adamc@1093	1911 \| L'.EApp (e, _) => findHead' e
adamc@1093	1912 \| L'.ECApp (e, _) => findHead' e
adamc@1093	1913 \| L'.EKApp (e, _) => findHead' e
adamc@1093	1914 \| _ => false
adamc@1093	1915 in
adamc@1093	1916 if findHead' e' then
adamc@1093	1917 SOME infer
adamc@1093	1918 else
adamc@1093	1919 NONE
adamc@1093	1920 end
adamc@1093	1921 \| L.EApp (e, _) => findHead e
adamc@1093	1922 \| L.ECApp (e, _) => findHead e
adamc@1093	1923 \| L.EDisjointApp e => findHead e
adamc@1093	1924 \| _ => NONE
adamc@1093	1925 in
adamc@1093	1926 findHead e
adamc@1093	1927 end
adamc@1093	1928
adam@1640	1929 datatype needed = Needed of {Cons : (L'.kind * int) SM.map,
adam@1640	1930 NextCon : int,
adamc@1264	1931 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264	1932 Vals : SS.set,
adamc@1270	1933 Mods : (E.env * needed) SM.map}
adamc@1264	1934
adam@1640	1935 fun ncons (Needed r) = map (fn (k, (v, _)) => (k, v))
adam@1640	1936 (ListMergeSort.sort (fn ((_, (_, n1)), (_, (_, n2))) => n1 > n2)
adam@1640	1937 (SM.listItemsi (#Cons r)))
adamc@1264	1938 fun nconstraints (Needed r) = #Constraints r
adamc@1264	1939 fun nvals (Needed r) = #Vals r
adamc@1264	1940 fun nmods (Needed r) = #Mods r
adamc@1264	1941
adamc@1264	1942 val nempty = Needed {Cons = SM.empty,
adam@1640	1943 NextCon = 0,
adamc@1264	1944 Constraints = nil,
adamc@1264	1945 Vals = SS.empty,
adamc@1264	1946 Mods = SM.empty}
adamc@1264	1947
adamc@1264	1948 fun naddCon (r : needed, k, v) =
adamc@1264	1949 let
adamc@1264	1950 val Needed r = r
adamc@1264	1951 in
adam@1640	1952 Needed {Cons = SM.insert (#Cons r, k, (v, #NextCon r)),
adam@1640	1953 NextCon = #NextCon r + 1,
adamc@1264	1954 Constraints = #Constraints r,
adamc@1264	1955 Vals = #Vals r,
adamc@1264	1956 Mods = #Mods r}
adamc@1264	1957 end
adamc@1264	1958
adamc@1264	1959 fun naddConstraint (r : needed, v) =
adamc@1264	1960 let
adamc@1264	1961 val Needed r = r
adamc@1264	1962 in
adamc@1264	1963 Needed {Cons = #Cons r,
adam@1640	1964 NextCon = #NextCon r,
adamc@1264	1965 Constraints = v :: #Constraints r,
adamc@1264	1966 Vals = #Vals r,
adamc@1264	1967 Mods = #Mods r}
adamc@1264	1968 end
adamc@1264	1969
adamc@1264	1970 fun naddVal (r : needed, k) =
adamc@1264	1971 let
adamc@1264	1972 val Needed r = r
adamc@1264	1973 in
adamc@1264	1974 Needed {Cons = #Cons r,
adam@1640	1975 NextCon = #NextCon r,
adamc@1264	1976 Constraints = #Constraints r,
adamc@1264	1977 Vals = SS.add (#Vals r, k),
adamc@1264	1978 Mods = #Mods r}
adamc@1264	1979 end
adamc@1264	1980
adamc@1264	1981 fun naddMod (r : needed, k, v) =
adamc@1264	1982 let
adamc@1264	1983 val Needed r = r
adamc@1264	1984 in
adamc@1264	1985 Needed {Cons = #Cons r,
adam@1640	1986 NextCon = #NextCon r,
adamc@1264	1987 Constraints = #Constraints r,
adamc@1264	1988 Vals = #Vals r,
adamc@1264	1989 Mods = SM.insert (#Mods r, k, v)}
adamc@1264	1990 end
adamc@1264	1991
adamc@1264	1992 fun ndelCon (r : needed, k) =
adamc@1264	1993 let
adamc@1264	1994 val Needed r = r
adamc@1264	1995 in
adamc@1264	1996 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adam@1640	1997 NextCon = #NextCon r,
adamc@1264	1998 Constraints = #Constraints r,
adamc@1264	1999 Vals = #Vals r,
adamc@1264	2000 Mods = #Mods r}
adamc@1264	2001 end
adamc@1264	2002
adamc@1264	2003 fun ndelVal (r : needed, k) =
adamc@1264	2004 let
adamc@1264	2005 val Needed r = r
adamc@1264	2006 in
adamc@1264	2007 Needed {Cons = #Cons r,
adam@1640	2008 NextCon = #NextCon r,
adamc@1264	2009 Constraints = #Constraints r,
adamc@1264	2010 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264	2011 Mods = #Mods r}
adamc@1264	2012 end
adamc@1264	2013
adam@1591	2014 fun chaseUnifs c =
adam@1591	2015 case #1 c of
adam@1639	2016 L'.CUnif (_, _, _, _, ref (L'.Known c)) => chaseUnifs c
adam@1591	2017 \| _ => c
adam@1591	2018
adam@2092	2019 val consEqSimple =
adam@2092	2020 let
adam@2092	2021 fun ces env (c1 : L'.con, c2 : L'.con) =
adam@2092	2022 let
adam@2092	2023 val c1 = hnormCon env c1
adam@2092	2024 val c2 = hnormCon env c2
adam@2092	2025 in
adam@2092	2026 case (#1 c1, #1 c2) of
adam@2092	2027 (L'.CRel n1, L'.CRel n2) => n1 = n2
adam@2092	2028 \| (L'.CNamed n1, L'.CNamed n2) =>
adam@2092	2029 n1 = n2 orelse
adam@2092	2030 (case #3 (E.lookupCNamed env n1) of
adam@2092	2031 SOME (L'.CNamed n2', _) => n2' = n1
adam@2092	2032 \| _ => false)
adam@2092	2033 \| (L'.CModProj n1, L'.CModProj n2) => n1 = n2
adam@2092	2034 \| (L'.CApp (f1, x1), L'.CApp (f2, x2)) => ces env (f1, f2) andalso ces env (x1, x2)
adam@2092	2035 \| (L'.CAbs (x1, k1, c1), L'.CAbs (_, _, c2)) => ces (E.pushCRel env x1 k1) (c1, c2)
adam@2092	2036 \| (L'.CName x1, L'.CName x2) => x1 = x2
adam@2092	2037 \| (L'.CRecord (_, xts1), L'.CRecord (_, xts2)) =>
adam@2092	2038 ListPair.all (fn ((x1, t1), (x2, t2)) =>
adam@2092	2039 ces env (x1, x2) andalso ces env (t2, t2)) (xts1, xts2)
adam@2092	2040 \| (L'.CConcat (x1, y1), L'.CConcat (x2, y2)) =>
adam@2092	2041 ces env (x1, x2) andalso ces env (y1, y2)
adam@2092	2042 \| (L'.CMap _, L'.CMap _) => true
adam@2092	2043 \| (L'.CUnit, L'.CUnit) => true
adam@2092	2044 \| (L'.CTuple cs1, L'.CTuple cs2) => ListPair.all (ces env) (cs1, cs2)
adam@2092	2045 \| (L'.CProj (c1, n1), L'.CProj (c2, n2)) => ces env (c1, c2) andalso n1 = n2
adam@2092	2046 \| (L'.CUnif (_, _, _, _, r1), L'.CUnif (_, _, _, _, r2)) => r1 = r2
adam@2101	2047
adam@2101	2048 \| (L'.TFun (d1, r1), L'.TFun (d2, r2)) => ces env (d1, d2) andalso ces env (r1, r2)
adam@2101	2049 \| (L'.TRecord c1, L'.TRecord c2) => ces env (c1, c2)
adam@2101	2050
adam@2092	2051 \| _ => false
adam@2092	2052 end
adam@2092	2053 in
adam@2092	2054 ces
adam@2092	2055 end
adam@2092	2056
adam@2092	2057
adamc@92	2058 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91	2059 let
adamc@848	2060 (val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)])
adamc@514	2061 (val befor = Time.now ())
adamc@280	2062
adamc@280	2063 val r = case e of
adamc@91	2064 L.EAnnot (e, t) =>
adamc@91	2065 let
adamc@91	2066 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	2067 val (t', _, gs2) = elabCon (env, denv) t
adamc@91	2068 in
adamc@628	2069 checkCon env e' et t';
adamc@628	2070 (e', t', gs1 @ enD gs2)
adamc@91	2071 end
adamc@34	2072
adamc@91	2073 \| L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403	2074 \| L.EVar ([], s, infer) =>
adamc@91	2075 (case E.lookupE env s of
adamc@91	2076 E.NotBound =>
adamc@91	2077 (expError env (UnboundExp (loc, s));
adamc@91	2078 (eerror, cerror, []))
adamc@629	2079 \| E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629	2080 \| E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403	2081 \| L.EVar (m1 :: ms, s, infer) =>
adamc@91	2082 (case E.lookupStr env m1 of
adamc@91	2083 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91	2084 (eerror, cerror, []))
adamc@91	2085 \| SOME (n, sgn) =>
adamc@91	2086 let
adamc@91	2087 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91	2088 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91	2089 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91	2090 (strerror, sgnerror))
adamc@91	2091 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91	2092 ((L'.StrVar n, loc), sgn) ms
adamc@10	2093
adamc@91	2094 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91	2095 NONE => (expError env (UnboundExp (loc, s));
adamc@91	2096 cerror)
adamc@91	2097 \| SOME t => t
adamc@91	2098 in
adamc@629	2099 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91	2100 end)
adamc@86	2101
adamc@349	2102 \| L.EWild =>
adamc@210	2103 let
adamc@349	2104 val r = ref NONE
adam@1639	2105 val c = cunif env (loc, (L'.KType, loc))
adamc@210	2106 in
adamc@349	2107 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210	2108 end
adamc@210	2109
adamc@91	2110 \| L.EApp (e1, e2) =>
adamc@91	2111 let
adamc@91	2112 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093	2113
adamc@403	2114 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71	2115
adam@1639	2116 val dom = cunif env (loc, ktype)
adam@1639	2117 val ran = cunif env (loc, ktype)
adamc@838	2118 val t = (L'.TFun (dom, ran), loc)
adamc@1093	2119
adamc@1093	2120 val () = checkCon env e1' t1 t
adamc@1093	2121 val () = checkCon env e2' t2 dom
adamc@1093	2122
adamc@1093	2123 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093	2124 val (ef, et, gs3) =
adamc@1093	2125 case findHead e1 e1' of
adam@1591	2126 NONE => (ef, (#1 (chaseUnifs ran), loc), [])
adamc@1093	2127 \| SOME infer => elabHead (env, denv) infer ef ran
adamc@91	2128 in
adamc@1093	2129 (ef, et, gs1 @ gs2 @ gs3)
adamc@91	2130 end
adamc@91	2131 \| L.EAbs (x, to, e) =>
adamc@91	2132 let
adamc@91	2133 val (t', gs1) = case to of
adam@1639	2134 NONE => (cunif env (loc, ktype), [])
adamc@91	2135 \| SOME t =>
adamc@91	2136 let
adamc@91	2137 val (t', tk, gs) = elabCon (env, denv) t
adamc@91	2138 in
adamc@91	2139 checkKind env t' tk ktype;
adamc@91	2140 (t', gs)
adamc@91	2141 end
adamc@467	2142 val dom = normClassConstraint env t'
adamc@467	2143 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91	2144 in
adamc@91	2145 ((L'.EAbs (x, t', et, e'), loc),
adamc@91	2146 (L'.TFun (t', et), loc),
adamc@467	2147 enD gs1 @ gs2)
adamc@91	2148 end
adamc@91	2149 \| L.ECApp (e, c) =>
adamc@91	2150 let
adamc@91	2151 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093	2152
adamc@328	2153 val oldEt = et
adamc@403	2154 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628	2155 val (et', _) = hnormCon env et
adamc@91	2156 in
adamc@91	2157 case et' of
adamc@91	2158 L'.CError => (eerror, cerror, [])
adamc@328	2159 \| L'.TCFun (_, x, k, eb) =>
adamc@91	2160 let
adamc@91	2161 val () = checkKind env c' ck k
adam@1303	2162 val eb' = subConInCon env (0, c') eb
adamc@1093	2163
adamc@1093	2164 val ef = (L'.ECApp (e', c'), loc)
adamc@1093	2165 val (ef, eb', gs3) =
adamc@1093	2166 case findHead e e' of
adamc@1093	2167 NONE => (ef, eb', [])
adamc@1093	2168 \| SOME infer => elabHead (env, denv) infer ef eb'
adamc@91	2169 in
adamc@328	2170 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328	2171 ("et", p_con env oldEt),
adamc@328	2172 ("x", PD.string x),
adamc@328	2173 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328	2174 ("c", p_con env c'),
adamc@328	2175 ("eb'", p_con env eb')];*)
adam@1591	2176 (ef, (#1 eb', loc), gs1 @ enD gs2 @ gs3)
adamc@91	2177 end
adamc@91	2178
adamc@91	2179 \| _ =>
adamc@91	2180 (expError env (WrongForm ("constructor function", e', et));
adamc@91	2181 (eerror, cerror, []))
adamc@91	2182 end
adamc@91	2183 \| L.ECAbs (expl, x, k, e) =>
adamc@91	2184 let
adamc@91	2185 val expl' = elabExplicitness expl
adamc@623	2186 val k' = elabKind env k
adamc@328	2187
adamc@328	2188 val env' = E.pushCRel env x k'
adamc@328	2189 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91	2190 in
adamc@91	2191 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91	2192 (L'.TCFun (expl', x, k', et), loc),
adamc@91	2193 gs)
adamc@91	2194 end
adamc@623	2195 \| L.EKAbs (x, e) =>
adamc@623	2196 let
adamc@623	2197 val env' = E.pushKRel env x
adamc@623	2198 val (e', et, gs) = elabExp (env', denv) e
adamc@623	2199 in
adamc@623	2200 ((L'.EKAbs (x, e'), loc),
adamc@623	2201 (L'.TKFun (x, et), loc),
adamc@623	2202 gs)
adamc@623	2203 end
adamc@91	2204
adamc@91	2205 \| L.EDisjoint (c1, c2, e) =>
adamc@91	2206 let
adamc@91	2207 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91	2208 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91	2209
adam@1639	2210 val ku1 = kunif env loc
adam@1639	2211 val ku2 = kunif env loc
adamc@91	2212
adamc@628	2213 val denv' = D.assert env denv (c1', c2')
adamc@628	2214 val (e', t, gs3) = elabExp (env, denv') e
adamc@91	2215 in
adamc@91	2216 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91	2217 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91	2218
adamc@628	2219 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91	2220 end
adamc@629	2221 \| L.EDisjointApp e =>
adamc@629	2222 let
adamc@629	2223 val (e', t, gs1) = elabExp (env, denv) e
adamc@629	2224
adam@1639	2225 val k1 = kunif env loc
adam@1639	2226 val c1 = cunif env (loc, (L'.KRecord k1, loc))
adam@1639	2227 val k2 = kunif env loc
adam@1639	2228 val c2 = cunif env (loc, (L'.KRecord k2, loc))
adam@1639	2229 val t' = cunif env (loc, ktype)
adamc@629	2230 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629	2231 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629	2232 in
adam@1591	2233 (e', (#1 (chaseUnifs t'), loc), enD gs2 @ gs1)
adamc@629	2234 end
adamc@91	2235
adam@2009	2236 \| L.ERecord (xes, flex) =>
adamc@91	2237 let
adam@2009	2238 val () = if flex then
adam@2009	2239 expError env (IllegalFlex eAll)
adam@2009	2240 else
adam@2009	2241 ()
adam@2009	2242
adamc@91	2243 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91	2244 let
adamc@91	2245 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91	2246 val (e', et, gs2) = elabExp (env, denv) e
adamc@91	2247 in
adamc@91	2248 checkKind env x' xk kname;
adamc@228	2249 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91	2250 end)
adamc@91	2251 [] xes
adamc@91	2252
adamc@91	2253 val k = (L'.KType, loc)
adamc@91	2254
adamc@91	2255 fun prove (xets, gs) =
adamc@91	2256 case xets of
adamc@91	2257 [] => gs
adamc@91	2258 \| (x, _, t) :: rest =>
adamc@91	2259 let
adamc@91	2260 val xc = (x, t)
adamc@91	2261 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91	2262 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91	2263 let
adamc@91	2264 val xc' = (x', t')
adamc@91	2265 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91	2266 in
adamc@91	2267 D.prove env denv (r1, r2, loc) @ gs
adamc@91	2268 end)
adamc@91	2269 gs rest
adamc@91	2270 in
adamc@91	2271 prove (rest, gs)
adamc@91	2272 end
adamc@228	2273
adamc@228	2274 val gsD = List.mapPartial (fn Disjoint d => SOME d \| _ => NONE) gs
adamc@228	2275 val gsO = List.filter (fn Disjoint _ => false \| _ => true) gs
adamc@91	2276 in
adamc@255	2277 (TextIO.print ("\|gsO\| = " ^ Int.toString (length gsO) ^ "\n");)
adamc@91	2278 ((L'.ERecord xes', loc),
adamc@91	2279 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228	2280 enD (prove (xes', gsD)) @ gsO)
adamc@91	2281 end
adamc@91	2282
adamc@91	2283 \| L.EField (e, c) =>
adamc@91	2284 let
adamc@91	2285 val (e', et, gs1) = elabExp (env, denv) e
adamc@91	2286 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91	2287
adam@1639	2288 val ft = cunif env (loc, ktype)
adam@1639	2289 val rest = cunif env (loc, ktype_record)
adamc@91	2290 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2291 val () = checkCon env e' et
adamc@629	2292 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628	2293 val gs3 = D.prove env denv (first, rest, loc)
adamc@91	2294 in
adamc@628	2295 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91	2296 end
adamc@91	2297
adamc@445	2298 \| L.EConcat (e1, e2) =>
adamc@339	2299 let
adamc@339	2300 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445	2301 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445	2302
adam@1639	2303 val r1 = cunif env (loc, ktype_record)
adam@1639	2304 val r2 = cunif env (loc, ktype_record)
adamc@445	2305
adamc@629	2306 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629	2307 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629	2308
adamc@628	2309 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339	2310 in
adamc@445	2311 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445	2312 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628	2313 gs1 @ gs2 @ enD gs3)
adamc@339	2314 end
adamc@149	2315 \| L.ECut (e, c) =>
adamc@149	2316 let
adamc@149	2317 val (e', et, gs1) = elabExp (env, denv) e
adamc@149	2318 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149	2319
adam@1639	2320 val ft = cunif env (loc, ktype)
adam@1639	2321 val rest = cunif env (loc, ktype_record)
adamc@149	2322 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629	2323
adamc@629	2324 val () = checkCon env e' et
adamc@629	2325 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149	2326
adamc@628	2327 val gs3 = D.prove env denv (first, rest, loc)
adamc@149	2328 in
adam@1299	2329 checkKind env c' ck kname;
adamc@228	2330 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2331 gs1 @ enD gs2 @ enD gs3)
adamc@149	2332 end
adamc@493	2333 \| L.ECutMulti (e, c) =>
adamc@493	2334 let
adamc@493	2335 val (e', et, gs1) = elabExp (env, denv) e
adamc@493	2336 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493	2337
adam@1639	2338 val rest = cunif env (loc, ktype_record)
adamc@629	2339
adamc@629	2340 val () = checkCon env e' et
adamc@629	2341 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493	2342
adamc@628	2343 val gs3 = D.prove env denv (c', rest, loc)
adamc@493	2344 in
adam@1299	2345 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493	2346 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628	2347 gs1 @ enD gs2 @ enD gs3)
adamc@493	2348 end
adamc@149	2349
adamc@171	2350 \| L.ECase (e, pes) =>
adamc@171	2351 let
adamc@171	2352 val (e', et, gs1) = elabExp (env, denv) e
adam@1639	2353 val result = cunif env (loc, (L'.KType, loc))
adamc@171	2354 val (pes', gs) = ListUtil.foldlMap
adamc@171	2355 (fn ((p, e), gs) =>
adamc@171	2356 let
adamc@628	2357 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628	2358
adamc@629	2359 val (e', et', gs1) = elabExp (env, denv) e
adamc@171	2360 in
adamc@628	2361 checkPatCon env p' pt et;
adamc@629	2362 checkCon env e' et' result;
adamc@628	2363 ((p', e'), gs1 @ gs)
adamc@171	2364 end)
adamc@171	2365 gs1 pes
adamc@171	2366 in
adamc@819	2367 case exhaustive (env, et, map #1 pes', loc) of
adamc@819	2368 NONE => ()
adamc@830	2369 \| SOME p => if !mayDelay then
adamc@830	2370 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830	2371 else
adamc@830	2372 expError env (Inexhaustive (loc, p));
adamc@172	2373
adamc@628	2374 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171	2375 end
adamc@447	2376
adamc@447	2377 \| L.ELet (eds, e) =>
adamc@447	2378 let
adamc@447	2379 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447	2380 val (e, t, gs2) = elabExp (env, denv) e
adamc@447	2381 in
adamc@825	2382 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447	2383 end
adamc@280	2384 in
adamc@819	2385 (prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];)
adamc@280	2386 r
adamc@91	2387 end
adamc@31	2388
adamc@628	2389 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447	2390 let
adamc@447	2391 val r =
adamc@447	2392 case d of
adamc@825	2393 L.EDVal (p, e) =>
adamc@447	2394 let
adamc@825	2395 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825	2396 val (e', et, gs1) = elabExp (env, denv) e
adamc@825	2397
adamc@825	2398 val () = checkCon env e' et pt
adamc@825	2399
adam@1554	2400 val env' = E.patBinds env p'
adam@1554	2401 (* Redo to get proper detection of type class witnesses *)
adam@1554	2402
adamc@825	2403 val pt = normClassConstraint env pt
adamc@447	2404 in
adamc@830	2405 case exhaustive (env, et, [p'], loc) of
adamc@830	2406 NONE => ()
adamc@830	2407 \| SOME p => if !mayDelay then
adamc@830	2408 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830	2409 else
adamc@830	2410 expError env (Inexhaustive (loc, p));
adamc@830	2411
adamc@825	2412 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447	2413 end
adamc@447	2414 \| L.EDValRec vis =>
adamc@447	2415 let
adamc@447	2416 fun allowable (e, _) =
adamc@447	2417 case e of
adamc@447	2418 L.EAbs _ => true
adamc@447	2419 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	2420 \| L.EKAbs (_, e) => allowable e
adamc@447	2421 \| L.EDisjoint (_, _, e) => allowable e
adamc@447	2422 \| _ => false
adamc@447	2423
adamc@447	2424 val (vis, gs) = ListUtil.foldlMap
adamc@447	2425 (fn ((x, co, e), gs) =>
adamc@447	2426 let
adamc@447	2427 val (c', _, gs1) = case co of
adam@1639	2428 NONE => (cunif env (loc, ktype), ktype, [])
adamc@447	2429 \| SOME c => elabCon (env, denv) c
adamc@447	2430 in
adamc@447	2431 ((x, c', e), enD gs1 @ gs)
adamc@447	2432 end) gs vis
adamc@447	2433
adamc@447	2434 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447	2435
adamc@447	2436 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447	2437 let
adamc@447	2438 val (e', et, gs1) = elabExp (env, denv) e
adamc@447	2439 in
adamc@628	2440 checkCon env e' et c';
adamc@447	2441 if allowable e then
adamc@447	2442 ()
adamc@447	2443 else
adamc@447	2444 expError env (IllegalRec (x, e'));
adamc@628	2445 ((x, c', e'), gs1 @ gs)
adamc@447	2446 end) gs vis
adamc@447	2447 in
adamc@447	2448 ((L'.EDValRec vis, loc), (env, gs))
adamc@447	2449 end
adamc@447	2450 in
adamc@447	2451 r
adamc@447	2452 end
adamc@447	2453
adamc@42	2454 val hnormSgn = E.hnormSgn
adamc@31	2455
adamc@210	2456 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338	2457 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754	2458 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754	2459 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459	2460 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718	2461 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205	2462
adamc@469	2463 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469	2464 case E.lookupStr env str of
adamc@469	2465 NONE => (strError env (UnboundStr (loc, str));
adamc@469	2466 denv)
adamc@469	2467 \| SOME (n, sgn) =>
adamc@469	2468 let
adamc@469	2469 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469	2470 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469	2471 NONE => (strError env (UnboundStr (loc, m));
adamc@469	2472 (strerror, sgnerror))
adamc@469	2473 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469	2474 ((L'.StrVar n, loc), sgn) strs
adamc@1030	2475
adamc@1030	2476 fun collect first (st, sgn) =
adamc@1030	2477 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182	2478 NONE => []
adamc@1030	2479 \| SOME cs =>
adamc@1030	2480 case #1 (hnormSgn env sgn) of
adamc@1030	2481 L'.SgnConst sgis =>
adamc@1030	2482 foldl (fn (sgi, cs) =>
adamc@1030	2483 case #1 sgi of
adamc@1030	2484 L'.SgiStr (x, _, _) =>
adamc@1030	2485 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030	2486 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030	2487 \| SOME sgn' =>
adamc@1030	2488 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030	2489 cs))
adamc@1030	2490 \| _ => cs) cs sgis
adamc@1030	2491 \| _ => cs
adamc@469	2492 in
adamc@1030	2493 foldl (fn ((c1, c2), denv) =>
adamc@1030	2494 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469	2495 end
adamc@469	2496
adamc@88	2497 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270	2498 ((Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));)
adamc@1270	2499 case sgi of
adamc@1270	2500 L.SgiConAbs (x, k) =>
adamc@1270	2501 let
adamc@1270	2502 val k' = elabKind env k
adamc@1270	2503
adamc@1270	2504 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270	2505 in
adamc@1270	2506 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270	2507 end
adamc@1270	2508
adamc@1270	2509 \| L.SgiCon (x, ko, c) =>
adamc@1270	2510 let
adamc@1270	2511 val k' = case ko of
adam@1639	2512 NONE => kunif env loc
adamc@1270	2513 \| SOME k => elabKind env k
adamc@1270	2514
adamc@1270	2515 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2516 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270	2517 in
adamc@1270	2518 checkKind env c' ck k';
adamc@1270	2519
adamc@1270	2520 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2521 end
adamc@1270	2522
adamc@1270	2523 \| L.SgiDatatype dts =>
adamc@1270	2524 let
adamc@1270	2525 val k = (L'.KType, loc)
adamc@1270	2526
adamc@1270	2527 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270	2528 let
adamc@1270	2529 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2530 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270	2531 in
adamc@1270	2532 ((x, n, xs, xcs), env)
adamc@1270	2533 end)
adamc@1270	2534 env dts
adamc@1270	2535
adamc@1270	2536 val (dts, env) = ListUtil.foldlMap
adamc@1270	2537 (fn ((x, n, xs, xcs), env) =>
adamc@1270	2538 let
adamc@1270	2539 val t = (L'.CNamed n, loc)
adamc@1270	2540 val nxs = length xs - 1
adamc@1270	2541 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270	2542 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270	2543
adamc@1270	2544 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270	2545 (E.pushCRel env' x k,
adamc@1270	2546 D.enter denv')) (env, denv) xs
adamc@1270	2547
adamc@1270	2548 val (xcs, (used, env, gs)) =
adamc@1270	2549 ListUtil.foldlMap
adamc@1270	2550 (fn ((x, to), (used, env, gs)) =>
adamc@1270	2551 let
adamc@1270	2552 val (to, t, gs') = case to of
adamc@1270	2553 NONE => (NONE, t, gs)
adamc@1270	2554 \| SOME t' =>
adamc@1270	2555 let
adamc@1270	2556 val (t', tk, gs') =
adamc@1270	2557 elabCon (env', denv') t'
adamc@1270	2558 in
adamc@1270	2559 checkKind env' t' tk k;
adamc@1270	2560 (SOME t',
adamc@1270	2561 (L'.TFun (t', t), loc),
adamc@1270	2562 gs' @ gs)
adamc@1270	2563 end
adamc@1270	2564 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2565 t xs
adamc@1270	2566
adamc@1270	2567 val (env, n') = E.pushENamed env x t
adamc@1270	2568 in
adamc@1270	2569 if SS.member (used, x) then
adamc@1270	2570 strError env (DuplicateConstructor (x, loc))
adamc@1270	2571 else
adamc@1270	2572 ();
adamc@1270	2573 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270	2574 end)
adamc@1270	2575 (SS.empty, env, []) xcs
adamc@1270	2576 in
adamc@1270	2577 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270	2578 end)
adamc@1270	2579 env dts
adamc@1270	2580 in
adamc@1270	2581 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270	2582 end
adamc@1270	2583
adamc@1270	2584 \| L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270	2585
adamc@1270	2586 \| L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270	2587 (case E.lookupStr env m1 of
adamc@1270	2588 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270	2589 ([], (env, denv, gs)))
adamc@1270	2590 \| SOME (n, sgn) =>
adamc@1270	2591 let
adamc@1270	2592 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270	2593 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270	2594 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270	2595 (strerror, sgnerror))
adamc@1270	2596 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270	2597 ((L'.StrVar n, loc), sgn) ms
adamc@1270	2598 in
adamc@1270	2599 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270	2600 (L'.CModProj (n, ms, s), _) =>
adamc@1270	2601 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270	2602 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270	2603 ([], (env, denv, [])))
adamc@1270	2604 \| SOME (xs, xncs) =>
adamc@1270	2605 let
adamc@1270	2606 val k = (L'.KType, loc)
adamc@1270	2607 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270	2608
adamc@1270	2609 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270	2610 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270	2611 val env = E.pushDatatype env n' xs xncs
adamc@1270	2612
adamc@1270	2613 val t = (L'.CNamed n', loc)
adamc@1270	2614 val env = foldl (fn ((x, n, to), env) =>
adamc@805	2615 let
adamc@1270	2616 val t = case to of
adamc@1270	2617 NONE => t
adamc@1270	2618 \| SOME t' => (L'.TFun (t', t), loc)
adamc@1270	2619
adamc@1270	2620 val t = foldr (fn (x, t) =>
adamc@1270	2621 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270	2622 t xs
adamc@805	2623 in
adamc@1270	2624 E.pushENamedAs env x n t
adamc@1270	2625 end) env xncs
adamc@1270	2626 in
adamc@1270	2627 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270	2628 end)
adamc@1270	2629 \| _ => (strError env (NotDatatype loc);
adamc@1270	2630 ([], (env, denv, [])))
adamc@1270	2631 end)
adamc@1270	2632
adamc@1270	2633 \| L.SgiVal (x, c) =>
adamc@1270	2634 let
adamc@1270	2635 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270	2636
adamc@1270	2637 val old = c'
adamc@1270	2638 val c' = normClassConstraint env c'
adamc@1270	2639 val (env', n) = E.pushENamed env x c'
adamc@1270	2640 in
adamc@1270	2641 (unifyKinds env ck ktype
adam@1719	2642 handle KUnify arg => strError env (NotType (loc, ck, arg)));
adamc@1270	2643
adamc@1270	2644 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270	2645 end
adamc@1270	2646
adamc@1270	2647 \| L.SgiTable (x, c, pe, ce) =>
adamc@1270	2648 let
adamc@1270	2649 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270	2650
adamc@1270	2651 val (c', ck, gs') = elabCon (env, denv) c
adam@1639	2652 val pkey = cunif env (loc, cstK)
adam@1639	2653 val visible = cunif env (loc, cstK)
adam@1886	2654
adam@1886	2655 val x' = x ^ "_hidden_constraints"
adam@1886	2656 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adam@1886	2657 val hidden = (L'.CNamed hidden_n, loc)
adam@1886	2658
adam@1886	2659 val uniques = (L'.CConcat (visible, hidden), loc)
adamc@1270	2660
adamc@1270	2661 val ct = tableOf ()
adamc@1270	2662 val ct = (L'.CApp (ct, c'), loc)
adamc@1270	2663 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270	2664
adamc@1270	2665 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270	2666 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707	2667 \| _ => NONE) gs''
adamc@707	2668
adamc@1270	2669 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270	2670 val pst = (L'.CApp (pst, c'), loc)
adamc@1270	2671 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270	2672
adamc@1270	2673 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270	2674 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270	2675 \| _ => NONE) gs'''
adamc@1270	2676
adamc@1270	2677 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270	2678 val cst = (L'.CApp (cst, c'), loc)
adamc@1270	2679 val cst = (L'.CApp (cst, visible), loc)
adam@1886	2680
adam@1886	2681 val (env', n) = E.pushENamed env' x ct
adamc@1270	2682 in
adamc@1270	2683 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270	2684 checkCon env' pe' pet pst;
adamc@1270	2685 checkCon env' ce' cet cst;
adamc@1270	2686
adam@1886	2687 ([(L'.SgiConAbs (x', hidden_n, cstK), loc),
adam@1912	2688 (L'.SgiConstraint ((L'.CConcat (pkey, visible), loc), hidden), loc),
adam@1886	2689 (L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270	2690 end
adamc@1270	2691
adamc@1270	2692 \| L.SgiStr (x, sgn) =>
adamc@1270	2693 let
adamc@1270	2694 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2695 val (env', n) = E.pushStrNamed env x sgn'
adam@1864	2696 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1270	2697 in
adam@1864	2698 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv', gs' @ gs))
adamc@1270	2699 end
adamc@1270	2700
adamc@1270	2701 \| L.SgiSgn (x, sgn) =>
adamc@1270	2702 let
adamc@1270	2703 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2704 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270	2705 in
adamc@1270	2706 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270	2707 end
adamc@1270	2708
adamc@1270	2709 \| L.SgiInclude sgn =>
adamc@1270	2710 let
adamc@1270	2711 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270	2712 in
adamc@1270	2713 case #1 (hnormSgn env sgn') of
adamc@1270	2714 L'.SgnConst sgis =>
adamc@1270	2715 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270	2716 \| _ => (sgnError env (NotIncludable sgn');
adamc@1270	2717 ([], (env, denv, [])))
adamc@1270	2718 end
adamc@1270	2719
adamc@1270	2720 \| L.SgiConstraint (c1, c2) =>
adamc@1270	2721 let
adamc@1270	2722 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270	2723 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270	2724
adamc@1270	2725 val denv = D.assert env denv (c1', c2')
adamc@1270	2726 in
adam@1639	2727 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639	2728 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@1270	2729
adamc@1270	2730 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270	2731 end
adamc@1270	2732
adamc@1270	2733 \| L.SgiClassAbs (x, k) =>
adamc@1270	2734 let
adamc@1270	2735 val k = elabKind env k
adamc@1270	2736 val (env, n) = E.pushCNamed env x k NONE
adamc@1270	2737 val env = E.pushClass env n
adamc@1270	2738 in
adamc@1270	2739 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270	2740 end
adamc@1270	2741
adamc@1270	2742 \| L.SgiClass (x, k, c) =>
adamc@1270	2743 let
adamc@1270	2744 val k = elabKind env k
adamc@1270	2745 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270	2746 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270	2747 val env = E.pushClass env n
adamc@1270	2748 in
adamc@1270	2749 checkKind env c' ck k;
adamc@1270	2750 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270	2751 end)
adamc@211	2752
adamc@83	2753 and elabSgn (env, denv) (sgn, loc) =
adamc@31	2754 case sgn of
adamc@31	2755 L.SgnConst sgis =>
adamc@31	2756 let
adamc@88	2757 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62	2758
adamc@62	2759 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62	2760 case sgi of
adamc@62	2761 L'.SgiConAbs (x, _, _) =>
adamc@62	2762 (if SS.member (cons, x) then
adamc@62	2763 sgnError env (DuplicateCon (loc, x))
adamc@62	2764 else
adamc@62	2765 ();
adamc@62	2766 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2767 \| L'.SgiCon (x, _, _, _) =>
adamc@62	2768 (if SS.member (cons, x) then
adamc@62	2769 sgnError env (DuplicateCon (loc, x))
adamc@62	2770 else
adamc@62	2771 ();
adamc@62	2772 (SS.add (cons, x), vals, sgns, strs))
adamc@805	2773 \| L'.SgiDatatype dts =>
adamc@156	2774 let
adamc@805	2775 val (cons, vals) =
adamc@805	2776 let
adamc@805	2777 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805	2778 let
adamc@805	2779 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805	2780 (if SS.member (vals, x) then
adamc@805	2781 sgnError env (DuplicateVal (loc, x))
adamc@805	2782 else
adamc@805	2783 ();
adamc@805	2784 SS.add (vals, x)))
adamc@805	2785 vals xncs
adamc@805	2786 in
adamc@805	2787 if SS.member (cons, x) then
adamc@805	2788 sgnError env (DuplicateCon (loc, x))
adamc@805	2789 else
adamc@805	2790 ();
adamc@805	2791 (SS.add (cons, x), vals)
adamc@805	2792 end
adamc@805	2793 in
adamc@805	2794 foldl doOne (cons, vals) dts
adamc@805	2795 end
adamc@156	2796 in
adamc@805	2797 (cons, vals, sgns, strs)
adamc@156	2798 end
adamc@191	2799 \| L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156	2800 (if SS.member (cons, x) then
adamc@156	2801 sgnError env (DuplicateCon (loc, x))
adamc@156	2802 else
adamc@156	2803 ();
adamc@156	2804 (SS.add (cons, x), vals, sgns, strs))
adamc@62	2805 \| L'.SgiVal (x, _, _) =>
adamc@62	2806 (if SS.member (vals, x) then
adamc@62	2807 sgnError env (DuplicateVal (loc, x))
adamc@62	2808 else
adamc@62	2809 ();
adamc@62	2810 (cons, SS.add (vals, x), sgns, strs))
adamc@62	2811 \| L'.SgiSgn (x, _, _) =>
adamc@62	2812 (if SS.member (sgns, x) then
adamc@62	2813 sgnError env (DuplicateSgn (loc, x))
adamc@62	2814 else
adamc@62	2815 ();
adamc@62	2816 (cons, vals, SS.add (sgns, x), strs))
adamc@62	2817 \| L'.SgiStr (x, _, _) =>
adamc@62	2818 (if SS.member (strs, x) then
adamc@62	2819 sgnError env (DuplicateStr (loc, x))
adamc@62	2820 else
adamc@62	2821 ();
adamc@88	2822 (cons, vals, sgns, SS.add (strs, x)))
adamc@203	2823 \| L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563	2824 \| L'.SgiClassAbs (x, _, _) =>
adamc@211	2825 (if SS.member (cons, x) then
adamc@211	2826 sgnError env (DuplicateCon (loc, x))
adamc@211	2827 else
adamc@211	2828 ();
adamc@211	2829 (SS.add (cons, x), vals, sgns, strs))
adamc@563	2830 \| L'.SgiClass (x, _, _, _) =>
adamc@211	2831 (if SS.member (cons, x) then
adamc@211	2832 sgnError env (DuplicateCon (loc, x))
adamc@211	2833 else
adamc@211	2834 ();
adamc@460	2835 (SS.add (cons, x), vals, sgns, strs)))
adamc@62	2836 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31	2837 in
adamc@83	2838 ((L'.SgnConst sgis', loc), gs)
adamc@31	2839 end
adamc@31	2840 \| L.SgnVar x =>
adamc@31	2841 (case E.lookupSgn env x of
adamc@31	2842 NONE =>
adamc@31	2843 (sgnError env (UnboundSgn (loc, x));
adamc@83	2844 ((L'.SgnError, loc), []))
adamc@83	2845 \| SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41	2846 \| L.SgnFun (m, dom, ran) =>
adamc@41	2847 let
adamc@83	2848 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	2849 val (env', n) = E.pushStrNamed env m dom'
adamc@469	2850 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469	2851 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41	2852 in
adamc@83	2853 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41	2854 end
adam@1864	2855 \| L.SgnWhere (sgn, ms, x, c) =>
adamc@42	2856 let
adamc@83	2857 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83	2858 val (c', ck, ds2) = elabCon (env, denv) c
adam@1864	2859
adam@1864	2860 fun checkPath (ms, sgn') =
adam@1864	2861 case #1 (hnormSgn env sgn') of
adam@1864	2862 L'.SgnConst sgis =>
adam@1864	2863 List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adam@1864	2864 List.null ms andalso x' = x andalso
adam@1864	2865 (unifyKinds env k ck
adam@1864	2866 handle KUnify x => sgnError env (WhereWrongKind x);
adam@1864	2867 true)
adam@1864	2868 \| (L'.SgiStr (x', _, sgn''), _) =>
adam@1864	2869 (case ms of
adam@1864	2870 [] => false
adam@1864	2871 \| m :: ms' =>
adam@1864	2872 m = x' andalso
adam@1864	2873 checkPath (ms', sgn''))
adam@1864	2874 \| _ => false) sgis
adam@1864	2875 \| _ => false
adam@1864	2876 in
adam@1864	2877 if checkPath (ms, sgn') then
adam@1864	2878 ((L'.SgnWhere (sgn', ms, x, c'), loc), ds1 @ ds2)
adam@1864	2879 else
adam@1864	2880 (sgnError env (UnWhereable (sgn', x));
adam@1864	2881 (sgnerror, []))
adamc@42	2882 end
adamc@59	2883 \| L.SgnProj (m, ms, x) =>
adamc@59	2884 (case E.lookupStr env m of
adamc@59	2885 NONE => (strError env (UnboundStr (loc, m));
adamc@83	2886 (sgnerror, []))
adamc@59	2887 \| SOME (n, sgn) =>
adamc@59	2888 let
adamc@59	2889 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59	2890 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59	2891 NONE => (strError env (UnboundStr (loc, m));
adamc@59	2892 (strerror, sgnerror))
adamc@59	2893 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59	2894 ((L'.StrVar n, loc), sgn) ms
adamc@59	2895 in
adamc@59	2896 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59	2897 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83	2898 (sgnerror, []))
adamc@83	2899 \| SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59	2900 end)
adamc@59	2901
adamc@31	2902
adamc@706	2903 and selfify env {str, strs, sgn} =
adamc@66	2904 case #1 (hnormSgn env sgn) of
adamc@66	2905 L'.SgnError => sgn
adamc@66	2906 \| L'.SgnVar _ => sgn
adamc@66	2907
adamc@66	2908 \| L'.SgnConst sgis =>
adam@1387	2909 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387	2910 (fn (sgi, env) =>
adam@1387	2911 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387	2912 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2913 \| (L'.SgiDatatype dts, loc) =>
adam@1387	2914 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387	2915 \| (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387	2916 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387	2917 \| (L'.SgiStr (x, n, sgn), loc) =>
adam@1387	2918 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387	2919 \| x => [x],
adam@1387	2920 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66	2921 \| L'.SgnFun _ => sgn
adamc@66	2922 \| L'.SgnWhere _ => sgn
adamc@66	2923 \| L'.SgnProj (m, ms, x) =>
adamc@66	2924 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2925 (L'.StrVar m, #2 sgn) ms,
adamc@66	2926 sgn = #2 (E.lookupStrNamed env m),
adamc@66	2927 field = x} of
adamc@66	2928 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66	2929 \| SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66	2930
adamc@706	2931 and selfifyAt env {str, sgn} =
adamc@66	2932 let
adamc@66	2933 fun self (str, _) =
adamc@66	2934 case str of
adamc@66	2935 L'.StrVar x => SOME (x, [])
adamc@66	2936 \| L'.StrProj (str, x) =>
adamc@66	2937 (case self str of
adamc@66	2938 NONE => NONE
adamc@66	2939 \| SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66	2940 \| _ => NONE
adamc@66	2941 in
adamc@66	2942 case self str of
adamc@66	2943 NONE => sgn
adamc@66	2944 \| SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66	2945 end
adamc@66	2946
adamc@706	2947 and dopen env {str, strs, sgn} =
adamc@66	2948 let
adam@1527	2949 fun isVisible x = x <> "" andalso String.sub (x, 0) <> #"?"
adam@1527	2950
adamc@66	2951 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66	2952 (L'.StrVar str, #2 sgn) strs
adamc@66	2953 in
adamc@66	2954 case #1 (hnormSgn env sgn) of
adamc@66	2955 L'.SgnConst sgis =>
adamc@805	2956 ListUtil.foldlMapConcat
adamc@805	2957 (fn ((sgi, loc), env') =>
adamc@805	2958 let
adamc@805	2959 val d =
adamc@805	2960 case sgi of
adamc@805	2961 L'.SgiConAbs (x, n, k) =>
adam@1527	2962 if isVisible x then
adam@1527	2963 let
adam@1527	2964 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	2965 in
adam@1527	2966 [(L'.DCon (x, n, k, c), loc)]
adam@1527	2967 end
adam@1527	2968 else
adam@1527	2969 []
adamc@805	2970 \| L'.SgiCon (x, n, k, c) =>
adam@1527	2971 if isVisible x then
adam@1527	2972 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1527	2973 else
adam@1527	2974 []
adamc@805	2975 \| L'.SgiDatatype dts =>
adam@1527	2976 List.mapPartial (fn (x, n, xs, xncs) => if isVisible x then
adam@1527	2977 SOME (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adam@1527	2978 else
adam@1527	2979 NONE) dts
adamc@805	2980 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adam@1527	2981 if isVisible x then
adam@1527	2982 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adam@1527	2983 else
adam@1527	2984 []
adamc@805	2985 \| L'.SgiVal (x, n, t) =>
adam@1527	2986 if isVisible x then
adam@1527	2987 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adam@1527	2988 else
adam@1527	2989 []
adamc@805	2990 \| L'.SgiStr (x, n, sgn) =>
adam@1527	2991 if isVisible x then
adam@1527	2992 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adam@1527	2993 else
adam@1527	2994 []
adamc@805	2995 \| L'.SgiSgn (x, n, sgn) =>
adam@1527	2996 if isVisible x then
adam@1527	2997 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adam@1527	2998 else
adam@1527	2999 []
adamc@805	3000 \| L'.SgiConstraint (c1, c2) =>
adamc@805	3001 [(L'.DConstraint (c1, c2), loc)]
adamc@805	3002 \| L'.SgiClassAbs (x, n, k) =>
adam@1527	3003 if isVisible x then
adam@1527	3004 let
adam@1527	3005 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	3006 in
adam@1527	3007 [(L'.DCon (x, n, k, c), loc)]
adam@1527	3008 end
adam@1527	3009 else
adam@1527	3010 []
adamc@805	3011 \| L'.SgiClass (x, n, k, _) =>
adam@1527	3012 if isVisible x then
adam@1527	3013 let
adam@1527	3014 val c = (L'.CModProj (str, strs, x), loc)
adam@1527	3015 in
adam@1527	3016 [(L'.DCon (x, n, k, c), loc)]
adam@1527	3017 end
adam@1527	3018 else
adam@1527	3019 []
adamc@805	3020 in
adamc@805	3021 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805	3022 end)
adamc@805	3023 env sgis
adamc@66	3024 \| _ => (strError env (UnOpenable sgn);
adamc@628	3025 ([], env))
adamc@66	3026 end
adamc@66	3027
adamc@706	3028 and sgiOfDecl (d, loc) =
adamc@31	3029 case d of
adamc@123	3030 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156	3031 \| L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156	3032 \| L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123	3033 \| L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123	3034 \| L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123	3035 \| L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123	3036 \| L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	3037 \| L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123	3038 \| L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123	3039 \| L'.DExport _ => []
adamc@707	3040 \| L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707	3041 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707	3042 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460	3043 \| L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754	3044 \| L'.DView (tn, x, n, _, c) =>
adamc@754	3045 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@271	3046 \| L'.DDatabase _ => []
adamc@460	3047 \| L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720	3048 \| L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075	3049 \| L'.DTask _ => []
adamc@1199	3050 \| L'.DPolicy _ => []
adam@1294	3051 \| L'.DOnError _ => []
adam@2010	3052 \| L'.DFfi (x, n, _, t) => [(L'.SgiVal (x, n, t), loc)]
adamc@88	3053
adamc@1000	3054 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469	3055 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469	3056 ("sgn2", p_sgn env sgn2)];*)
adamc@35	3057 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31	3058 (L'.SgnError, _) => ()
adamc@31	3059 \| (_, L'.SgnError) => ()
adamc@31	3060
adamc@31	3061 \| (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31	3062 let
adam@2092	3063 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362	3064 ("sgn2", p_sgn env sgn2),
adamc@362	3065 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362	3066 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362	3067
adamc@838	3068 fun cpart n = IM.find (!counterparts, n)
adamc@838	3069 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838	3070
adamc@838	3071 val sub2 = U.Con.map {kind = fn k => k,
adamc@838	3072 con = fn c =>
adamc@838	3073 case c of
adamc@838	3074 L'.CNamed n2 =>
adamc@838	3075 (case cpart n2 of
adamc@838	3076 NONE => c
adamc@838	3077 \| SOME n1 => L'.CNamed n1)
adamc@838	3078 \| _ => c}
adamc@838	3079
adamc@628	3080 fun folder (sgi2All as (sgi, loc), env) =
adamc@31	3081 let
adam@1668	3082 (val () = prefaces "folder" [("sgi2", p_sgn_item env sgi2All)])
adamc@362	3083
adamc@805	3084 fun seek' f p =
adamc@31	3085 let
adamc@628	3086 fun seek env ls =
adamc@31	3087 case ls of
adamc@805	3088 [] => f env
adamc@31	3089 \| h :: t =>
adamc@469	3090 case p (env, h) of
adamc@469	3091 NONE =>
adamc@469	3092 let
adamc@469	3093 val env = case #1 h of
adamc@469	3094 L'.SgiCon (x, n, k, c) =>
adamc@471	3095 if E.checkENamed env n then
adamc@471	3096 env
adamc@471	3097 else
adamc@471	3098 E.pushCNamedAs env x n k (SOME c)
adamc@469	3099 \| L'.SgiConAbs (x, n, k) =>
adamc@471	3100 if E.checkENamed env n then
adamc@471	3101 env
adamc@471	3102 else
adamc@471	3103 E.pushCNamedAs env x n k NONE
adamc@469	3104 \| _ => env
adamc@469	3105 in
adamc@628	3106 seek (E.sgiBinds env h) t
adamc@469	3107 end
adamc@88	3108 \| SOME envs => envs
adamc@31	3109 in
adamc@628	3110 seek env sgis1
adamc@31	3111 end
adamc@805	3112
adamc@1000	3113 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805	3114 env))
adamc@31	3115 in
adamc@31	3116 case sgi of
adamc@31	3117 L'.SgiConAbs (x, n2, k2) =>
adam@1591	3118 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@31	3119 let
adamc@41	3120 fun found (x', n1, k1, co1) =
adamc@41	3121 if x = x' then
adamc@41	3122 let
adamc@623	3123 val () = unifyKinds env k1 k2
adam@1719	3124 handle KUnify (k1, k2, env', err) =>
adam@1591	3125 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719	3126 sgi2All, k2, env', err))
adamc@41	3127 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41	3128 in
adamc@41	3129 SOME (if n1 = n2 then
adamc@41	3130 env
adamc@41	3131 else
adamc@838	3132 (cparts (n2, n1);
adamc@838	3133 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41	3134 end
adamc@41	3135 else
adamc@41	3136 NONE
adamc@31	3137 in
adamc@31	3138 case sgi1 of
adamc@41	3139 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41	3140 \| L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805	3141 \| L'.SgiDatatype dts =>
adamc@191	3142 let
adamc@191	3143 val k = (L'.KType, loc)
adamc@805	3144
adamc@805	3145 fun search dts =
adamc@805	3146 case dts of
adamc@805	3147 [] => NONE
adamc@805	3148 \| (x', n1, xs, _) :: dts =>
adamc@805	3149 let
adamc@805	3150 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	3151 in
adamc@805	3152 case found (x', n1, k', NONE) of
adamc@805	3153 NONE => search dts
adamc@805	3154 \| x => x
adamc@805	3155 end
adamc@191	3156 in
adamc@805	3157 search dts
adamc@191	3158 end
adamc@191	3159 \| L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191	3160 let
adamc@191	3161 val k = (L'.KType, loc)
adamc@191	3162 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191	3163 in
adamc@191	3164 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191	3165 end
adamc@711	3166 \| L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711	3167 \| L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31	3168 \| _ => NONE
adamc@31	3169 end)
adamc@31	3170
adamc@31	3171 \| L'.SgiCon (x, n2, k2, c2) =>
adam@1591	3172 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3173 let
adamc@211	3174 fun found (x', n1, k1, c1) =
adamc@211	3175 if x = x' then
adamc@211	3176 let
adamc@838	3177 val c2 = sub2 c2
adamc@838	3178
adamc@327	3179 fun good () =
adamc@327	3180 let
adamc@327	3181 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327	3182 val env = if n1 = n2 then
adamc@327	3183 env
adamc@327	3184 else
adamc@839	3185 (cparts (n2, n1);
adamc@839	3186 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327	3187 in
adamc@628	3188 SOME env
adamc@327	3189 end
adamc@211	3190 in
adamc@987	3191 (unifyCons env loc c1 c2;
adamc@628	3192 good ())
adam@1719	3193 handle CUnify (c1, c2, env', err) =>
adam@1591	3194 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719	3195 sgi2All, c2, env', err));
adamc@211	3196 good ())
adamc@211	3197 end
adamc@211	3198 else
adamc@211	3199 NONE
adamc@211	3200 in
adamc@211	3201 case sgi1 of
adamc@211	3202 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711	3203 \| L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	3204 \| _ => NONE
adamc@211	3205 end)
adamc@31	3206
adamc@805	3207 \| L'.SgiDatatype dts2 =>
adamc@805	3208 let
adam@1591	3209 fun found' (sgi1All as (_, loc), (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805	3210 if x1 <> x2 then
adamc@805	3211 NONE
adamc@805	3212 else
adamc@805	3213 let
adamc@805	3214 fun mismatched ue =
adam@1591	3215 (sgnError env (SgiMismatchedDatatypes (loc, sgi1All, sgi2All, ue));
adamc@805	3216 SOME env)
adamc@805	3217
adamc@805	3218 val k = (L'.KType, loc)
adamc@805	3219 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805	3220
adamc@805	3221 fun good () =
adamc@805	3222 let
adamc@805	3223 val env = E.sgiBinds env sgi1All
adamc@805	3224 val env = if n1 = n2 then
adamc@805	3225 env
adamc@805	3226 else
adamc@838	3227 (cparts (n2, n1);
adamc@838	3228 E.pushCNamedAs env x1 n2 k'
adamc@838	3229 (SOME (L'.CNamed n1, loc)))
adamc@805	3230 in
adamc@805	3231 SOME env
adamc@805	3232 end
adamc@805	3233
adamc@805	3234 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805	3235 val env = if n1 = n2 then
adamc@805	3236 env
adamc@805	3237 else
adamc@838	3238 (cparts (n2, n1);
adamc@838	3239 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805	3240 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805	3241 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805	3242 String.compare (x1, x2) <> EQUAL
adamc@805	3243 orelse case (t1, t2) of
adamc@805	3244 (NONE, NONE) => false
adamc@805	3245 \| (SOME t1, SOME t2) =>
adamc@987	3246 (unifyCons env loc t1 (sub2 t2); false)
adamc@805	3247 \| _ => true
adamc@805	3248 in
adamc@805	3249 (if xs1 <> xs2
adamc@805	3250 orelse length xncs1 <> length xncs2
adamc@805	3251 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805	3252 mismatched NONE
adamc@160	3253 else
adamc@805	3254 good ())
adamc@805	3255 handle CUnify ue => mismatched (SOME ue)
adamc@805	3256 end
adamc@805	3257 in
adamc@805	3258 seek'
adamc@805	3259 (fn _ =>
adamc@805	3260 let
adamc@805	3261 fun seekOne (dt2, env) =
adamc@805	3262 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3263 case sgi1 of
adamc@805	3264 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805	3265 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805	3266 \| _ => NONE)
adamc@805	3267
adamc@805	3268 fun seekAll (dts, env) =
adamc@805	3269 case dts of
adamc@805	3270 [] => env
adamc@805	3271 \| dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805	3272 in
adamc@805	3273 seekAll (dts2, env)
adamc@805	3274 end)
adamc@805	3275 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805	3276 let
adamc@805	3277 fun found dts1 =
adamc@805	3278 let
adamc@805	3279 fun iter (dts1, dts2, env) =
adamc@805	3280 case (dts1, dts2) of
adamc@805	3281 ([], []) => SOME env
adamc@805	3282 \| (dt1 :: dts1, dt2 :: dts2) =>
adamc@805	3283 (case found' (sgi1All, dt1, dt2, env) of
adamc@805	3284 NONE => NONE
adamc@805	3285 \| SOME env => iter (dts1, dts2, env))
adamc@805	3286 \| _ => NONE
adamc@805	3287 in
adamc@805	3288 iter (dts1, dts2, env)
adamc@805	3289 end
adamc@805	3290 in
adamc@805	3291 case sgi1 of
adamc@805	3292 L'.SgiDatatype dts1 => found dts1
adamc@805	3293 \| _ => NONE
adamc@805	3294 end)
adamc@805	3295 end
adamc@156	3296
adamc@191	3297 \| L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adam@1591	3298 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@158	3299 case sgi1 of
adamc@191	3300 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158	3301 if x = x' then
adamc@158	3302 let
adamc@158	3303 val k = (L'.KType, loc)
adamc@191	3304 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158	3305 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158	3306 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158	3307
adamc@158	3308 fun good () =
adamc@158	3309 let
adamc@191	3310 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191	3311 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158	3312 in
adamc@838	3313 cparts (n2, n1);
adamc@628	3314 SOME env
adamc@158	3315 end
adamc@158	3316 in
adamc@987	3317 (unifyCons env loc t1 t2;
adamc@628	3318 good ())
adam@1719	3319 handle CUnify (c1, c2, env', err) =>
adam@1719	3320 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@158	3321 good ())
adamc@158	3322 end
adamc@158	3323 else
adamc@158	3324 NONE
adamc@158	3325
adamc@158	3326 \| _ => NONE)
adamc@156	3327
adamc@32	3328 \| L'.SgiVal (x, n2, c2) =>
adam@1591	3329 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@32	3330 case sgi1 of
adamc@41	3331 L'.SgiVal (x', n1, c1) =>
adamc@41	3332 if x = x' then
adamc@838	3333 ((*prefaces "val" [("x", PD.string x),
adamc@838	3334 ("n1", PD.string (Int.toString n1)),
adamc@838	3335 ("c1", p_con env c1),
adamc@838	3336 ("c2", p_con env c2),
adamc@838	3337 ("c2'", p_con env (sub2 c2))];*)
adamc@987	3338 unifyCons env loc c1 (sub2 c2);
adamc@628	3339 SOME env)
adam@1719	3340 handle CUnify (c1, c2, env', err) =>
adam@1719	3341 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@628	3342 SOME env)
adamc@41	3343 else
adamc@41	3344 NONE
adamc@32	3345 \| _ => NONE)
adamc@32	3346
adamc@33	3347 \| L'.SgiStr (x, n2, sgn2) =>
adam@1591	3348 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@33	3349 case sgi1 of
adamc@41	3350 L'.SgiStr (x', n1, sgn1) =>
adamc@41	3351 if x = x' then
adamc@66	3352 let
adam@2099	3353 (* Don't forget to save & restore the
adam@2099	3354 * counterparts map around recursive calls!
adam@2099	3355 * Otherwise, all sorts of mayhem may result. *)
adam@2099	3356 val saved = !counterparts
adam@1591	3357 val () = subSgn' counterparts env loc sgn1 sgn2
adam@2099	3358 val () = counterparts := saved
adamc@66	3359 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66	3360 val env = if n1 = n2 then
adamc@66	3361 env
adamc@66	3362 else
adamc@66	3363 E.pushStrNamedAs env x n2
adamc@66	3364 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66	3365 sgn = sgn2})
adamc@66	3366 in
adamc@628	3367 SOME env
adamc@66	3368 end
adamc@41	3369 else
adamc@41	3370 NONE
adamc@33	3371 \| _ => NONE)
adamc@59	3372
adamc@59	3373 \| L'.SgiSgn (x, n2, sgn2) =>
adam@1591	3374 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@59	3375 case sgi1 of
adamc@59	3376 L'.SgiSgn (x', n1, sgn1) =>
adamc@59	3377 if x = x' then
adamc@65	3378 let
adam@1591	3379 val () = subSgn' counterparts env loc sgn1 sgn2
adam@1591	3380 val () = subSgn' counterparts env loc sgn2 sgn1
adamc@65	3381
adamc@65	3382 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65	3383 val env = if n1 = n2 then
adamc@65	3384 env
adamc@65	3385 else
adamc@838	3386 (cparts (n2, n1);
adamc@838	3387 E.pushSgnNamedAs env x n1 sgn2)
adamc@65	3388 in
adamc@628	3389 SOME env
adamc@65	3390 end
adamc@59	3391 else
adamc@59	3392 NONE
adamc@59	3393 \| _ => NONE)
adamc@88	3394
adamc@88	3395 \| L'.SgiConstraint (c2, d2) =>
adam@1591	3396 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@88	3397 case sgi1 of
adamc@88	3398 L'.SgiConstraint (c1, d1) =>
adam@2092	3399 (* It's important to do only simple equality checking here,
adam@2092	3400 * with no unification, because constraints are unnamed.
adam@2092	3401 * It's too easy to pick the wrong pair to unify! *)
adam@2092	3402 if consEqSimple env (c1, c2)
adam@2092	3403 andalso consEqSimple env (d1, d2) then
adamc@628	3404 SOME env
adamc@88	3405 else
adamc@88	3406 NONE
adamc@88	3407 \| _ => NONE)
adamc@203	3408
adamc@563	3409 \| L'.SgiClassAbs (x, n2, k2) =>
adam@1591	3410 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3411 let
adamc@563	3412 fun found (x', n1, k1, co) =
adamc@211	3413 if x = x' then
adamc@211	3414 let
adamc@623	3415 val () = unifyKinds env k1 k2
adam@1719	3416 handle KUnify (k1, k2, env', err) =>
adam@1591	3417 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719	3418 sgi2All, k2, env', err))
adamc@563	3419
adamc@711	3420 val env = E.pushCNamedAs env x n1 k1 co
adamc@211	3421 in
adamc@211	3422 SOME (if n1 = n2 then
adamc@211	3423 env
adamc@211	3424 else
adamc@838	3425 (cparts (n2, n1);
adamc@838	3426 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211	3427 end
adamc@211	3428 else
adamc@211	3429 NONE
adamc@211	3430 in
adamc@211	3431 case sgi1 of
adamc@563	3432 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563	3433 \| L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adam@1797	3434 \| L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adam@1797	3435 \| L'.SgiCon (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211	3436 \| _ => NONE
adamc@211	3437 end)
adamc@563	3438 \| L'.SgiClass (x, n2, k2, c2) =>
adam@1591	3439 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211	3440 let
adamc@563	3441 fun found (x', n1, k1, c1) =
adamc@211	3442 if x = x' then
adamc@211	3443 let
adamc@623	3444 val () = unifyKinds env k1 k2
adam@1719	3445 handle KUnify (k1, k2, env', err) =>
adam@1591	3446 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719	3447 sgi2All, k2, env', err))
adamc@563	3448
adamc@838	3449 val c2 = sub2 c2
adamc@838	3450
adamc@218	3451 fun good () =
adamc@218	3452 let
adamc@711	3453 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218	3454 val env = if n1 = n2 then
adamc@218	3455 env
adamc@218	3456 else
adamc@839	3457 (cparts (n2, n1);
adamc@839	3458 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218	3459 in
adamc@628	3460 SOME env
adamc@218	3461 end
adamc@211	3462 in
adamc@987	3463 (unifyCons env loc c1 c2;
adamc@628	3464 good ())
adam@1719	3465 handle CUnify (c1, c2, env', err) =>
adam@1591	3466 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719	3467 sgi2All, c2, env', err));
adamc@211	3468 good ())
adamc@211	3469 end
adamc@211	3470 else
adamc@211	3471 NONE
adamc@211	3472 in
adamc@211	3473 case sgi1 of
adamc@563	3474 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adam@1797	3475 \| L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211	3476 \| _ => NONE
adamc@211	3477 end)
adamc@31	3478 end
adamc@31	3479 in
adamc@628	3480 ignore (foldl folder env sgis2)
adamc@31	3481 end
adamc@31	3482
adamc@41	3483 \| (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43	3484 let
adamc@480	3485 val ran2 =
adamc@43	3486 if n1 = n2 then
adamc@480	3487 ran2
adamc@43	3488 else
adamc@480	3489 subStrInSgn (n2, n1) ran2
adamc@43	3490 in
adamc@1000	3491 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000	3492 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43	3493 end
adamc@41	3494
adamc@1000	3495 \| _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41	3496
adam@1580	3497 and subSgn env x y z = subSgn' (ref IM.empty) env x y z
adam@1580	3498 handle e as E.UnboundNamed _ => if ErrorMsg.anyErrors () then () else raise e
adamc@61	3499
adamc@706	3500 and positive self =
adamc@312	3501 let
adamc@312	3502 open L
adamc@312	3503
adamc@312	3504 fun none (c, _) =
adamc@312	3505 case c of
adamc@312	3506 CAnnot (c, _) => none c
adamc@312	3507
adamc@312	3508 \| TFun (c1, c2) => none c1 andalso none c2
adamc@312	3509 \| TCFun (_, _, _, c) => none c
adamc@312	3510 \| TRecord c => none c
adamc@312	3511
adamc@312	3512 \| CVar ([], x) => x <> self
adamc@312	3513 \| CVar _ => true
adamc@312	3514 \| CApp (c1, c2) => none c1 andalso none c2
adamc@312	3515 \| CAbs _ => false
adamc@628	3516 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3517
adamc@623	3518 \| CKAbs _ => false
adamc@623	3519 \| TKFun _ => false
adamc@623	3520
adamc@312	3521 \| CName _ => true
adamc@312	3522
adamc@312	3523 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312	3524 \| CConcat (c1, c2) => none c1 andalso none c2
adamc@621	3525 \| CMap => true
adamc@312	3526
adamc@312	3527 \| CUnit => true
adamc@312	3528
adamc@312	3529 \| CTuple cs => List.all none cs
adamc@312	3530 \| CProj (c, _) => none c
adamc@312	3531
adamc@312	3532 \| CWild _ => false
adamc@312	3533
adamc@312	3534 fun pos (c, _) =
adamc@312	3535 case c of
adamc@312	3536 CAnnot (c, _) => pos c
adamc@312	3537
adamc@312	3538 \| TFun (c1, c2) => none c1 andalso pos c2
adamc@312	3539 \| TCFun (_, _, _, c) => pos c
adamc@312	3540 \| TRecord c => pos c
adamc@312	3541
adamc@312	3542 \| CVar _ => true
adamc@312	3543 \| CApp (c1, c2) => pos c1 andalso none c2
adamc@312	3544 \| CAbs _ => false
adamc@628	3545 \| TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312	3546
adamc@623	3547 \| CKAbs _ => false
adamc@623	3548 \| TKFun _ => false
adamc@623	3549
adamc@312	3550 \| CName _ => true
adamc@312	3551
adamc@312	3552 \| CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312	3553 \| CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621	3554 \| CMap => true
adamc@312	3555
adamc@312	3556 \| CUnit => true
adamc@312	3557
adamc@312	3558 \| CTuple cs => List.all pos cs
adamc@312	3559 \| CProj (c, _) => pos c
adamc@312	3560
adamc@312	3561 \| CWild _ => false
adamc@312	3562 in
adamc@312	3563 pos
adamc@312	3564 end
adamc@312	3565
adamc@706	3566 and wildifyStr env (str, sgn) =
adamc@325	3567 case #1 (hnormSgn env sgn) of
adamc@325	3568 L'.SgnConst sgis =>
adamc@325	3569 (case #1 str of
adamc@325	3570 L.StrConst ds =>
adamc@325	3571 let
adamc@1270	3572 fun cname d =
adamc@1270	3573 case d of
adamc@1270	3574 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270	3575 \| L'.SgiConAbs (x, _, _) => SOME x
adamc@1270	3576 \| L'.SgiClass (x, _, _, _) => SOME x
adamc@1270	3577 \| L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270	3578 \| _ => NONE
adamc@1270	3579
adamc@1270	3580 fun dname (d, _) =
adamc@1270	3581 case d of
adamc@1270	3582 L.DCon (x, _, _) => SOME x
adamc@1270	3583 \| _ => NONE
adamc@1270	3584
adamc@493	3585 fun decompileKind (k, loc) =
adamc@493	3586 case k of
adamc@493	3587 L'.KType => SOME (L.KType, loc)
adamc@493	3588 \| L'.KArrow (k1, k2) =>
adamc@493	3589 (case (decompileKind k1, decompileKind k2) of
adamc@493	3590 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493	3591 \| _ => NONE)
adamc@493	3592 \| L'.KName => SOME (L.KName, loc)
adamc@493	3593 \| L'.KRecord k =>
adamc@493	3594 (case decompileKind k of
adamc@493	3595 SOME k => SOME (L.KRecord k, loc)
adamc@493	3596 \| _ => NONE)
adamc@493	3597 \| L'.KUnit => SOME (L.KUnit, loc)
adamc@493	3598 \| L'.KTuple ks =>
adamc@493	3599 let
adamc@493	3600 val ks' = List.mapPartial decompileKind ks
adamc@493	3601 in
adamc@493	3602 if length ks' = length ks then
adamc@493	3603 SOME (L.KTuple ks', loc)
adamc@493	3604 else
adamc@493	3605 NONE
adamc@493	3606 end
adamc@493	3607
adamc@493	3608 \| L'.KError => NONE
adam@1639	3609 \| L'.KUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adamc@493	3610 \| L'.KUnif _ => NONE
adam@1639	3611 \| L'.KTupleUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adam@1302	3612 \| L'.KTupleUnif _ => NONE
adamc@493	3613
adamc@623	3614 \| L'.KRel _ => NONE
adamc@623	3615 \| L'.KFun _ => NONE
adamc@623	3616
adam@1529	3617 fun maybeHnorm env c =
adam@1865	3618 hnormCon env c
adam@1865	3619 handle E.UnboundNamed _ => c
adam@1865	3620
adam@1865	3621 fun decompileCon env c =
adam@1865	3622 case decompileCon' env c of
adam@1865	3623 SOME v => SOME v
adam@1865	3624 \| NONE => decompileCon' env (maybeHnorm env c)
adam@1865	3625
adam@1865	3626 and decompileCon' env (c as (_, loc)) =
adam@1865	3627 case #1 c of
adamc@325	3628 L'.CRel i =>
adamc@325	3629 let
adamc@325	3630 val (s, _) = E.lookupCRel env i
adamc@325	3631 in
adamc@325	3632 SOME (L.CVar ([], s), loc)
adamc@325	3633 end
adamc@325	3634 \| L'.CNamed i =>
adamc@325	3635 let
adamc@325	3636 val (s, _, _) = E.lookupCNamed env i
adamc@325	3637 in
adamc@325	3638 SOME (L.CVar ([], s), loc)
adamc@325	3639 end
adamc@325	3640 \| L'.CModProj (m1, ms, x) =>
adamc@325	3641 let
adamc@325	3642 val (s, _) = E.lookupStrNamed env m1
adamc@325	3643 in
adamc@325	3644 SOME (L.CVar (s :: ms, x), loc)
adamc@325	3645 end
adamc@325	3646 \| L'.CName s => SOME (L.CName s, loc)
adam@1886	3647 \| L'.CRecord (k, xcs) =>
adamc@325	3648 let
adamc@325	3649 fun fields xcs =
adamc@325	3650 case xcs of
adamc@325	3651 [] => SOME []
adamc@325	3652 \| (x, t) :: xcs =>
adamc@325	3653 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325	3654 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325	3655 \| _ => NONE
adam@1886	3656
adam@1886	3657 val c' = Option.map (fn xcs => (L.CRecord xcs, loc))
adam@1886	3658 (fields xcs)
adamc@325	3659 in
adam@1886	3660 Option.map (fn c' =>
adam@1886	3661 case decompileKind k of
adam@1886	3662 NONE => c'
adam@1886	3663 \| SOME k' => (L.CAnnot (c', (L.KRecord k', loc)), loc)) c'
adamc@325	3664 end
adamc@325	3665 \| L'.CConcat (c1, c2) =>
adamc@325	3666 (case (decompileCon env c1, decompileCon env c2) of
adamc@325	3667 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325	3668 \| _ => NONE)
adamc@325	3669 \| L'.CUnit => SOME (L.CUnit, loc)
adam@1639	3670 \| L'.CUnif (nl, _, _, _, ref (L'.Known c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325	3671
adam@1585	3672 \| L'.CApp (f, x) =>
adam@1585	3673 (case (decompileCon env f, decompileCon env x) of
adam@1585	3674 (SOME f, SOME x) => SOME (L.CApp (f, x), loc)
adam@1585	3675 \| _ => NONE)
adam@1585	3676
adam@1864	3677 \| L'.CTuple cs =>
adam@1864	3678 let
adam@1864	3679 val cs' = foldr (fn (c, cs') =>
adam@1864	3680 case cs' of
adam@1864	3681 NONE => NONE
adam@1864	3682 \| SOME cs' =>
adam@1864	3683 case decompileCon env c of
adam@1864	3684 NONE => NONE
adam@1864	3685 \| SOME c' => SOME (c' :: cs'))
adam@1864	3686 (SOME []) cs
adam@1864	3687 in
adam@1864	3688 case cs' of
adam@1864	3689 NONE => NONE
adam@1864	3690 \| SOME cs' => SOME (L.CTuple cs', loc)
adam@1864	3691 end
adam@1864	3692
adam@1864	3693 \| L'.CMap _ => SOME (L.CMap, loc)
adam@1865	3694 \| L'.TRecord c =>
adam@1865	3695 (case decompileCon env c of
adam@1865	3696 NONE => NONE
adam@1865	3697 \| SOME c' => SOME (L.TRecord c', loc))
adam@1864	3698
adam@1912	3699 \| c => ((Print.preface ("WTF?", p_con env (c, loc));) NONE)
adamc@325	3700
adam@2109	3701 fun isClassOrFolder' env (c : L'.con) =
adam@2109	3702 case #1 c of
adam@2109	3703 L'.CAbs (x, k, c) =>
adam@2109	3704 let
adam@2109	3705 val env = E.pushCRel env x k
adam@2109	3706
adam@2109	3707 fun toHead (c : L'.con) =
adam@2109	3708 case #1 c of
adam@2109	3709 L'.CApp (c, _) => toHead c
adam@2109	3710 \| _ => isClassOrFolder env c
adam@2109	3711 in
adam@2109	3712 toHead (hnormCon env c)
adam@2109	3713 end
adam@2109	3714 \| _ => isClassOrFolder env c
adam@2109	3715
adamc@1264	3716 fun buildNeeded env sgis =
adamc@1275	3717 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264	3718 (case sgi of
adam@1570	3719 L'.SgiCon (x, _, k, _) => naddCon (nd, x, k)
adam@1570	3720 \| L'.SgiConAbs (x, _, k) => naddCon (nd, x, k)
adamc@1264	3721 \| L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264	3722 \| L'.SgiVal (x, _, t) =>
adamc@1264	3723 let
adamc@1277	3724 fun should t =
adamc@1277	3725 let
adamc@1277	3726 val t = normClassConstraint env' t
adam@2094	3727
adam@2094	3728 fun shouldR c =
adam@2094	3729 case hnormCon env' c of
adam@2094	3730 (L'.CApp (f, _), _) =>
adam@2094	3731 (case hnormCon env' f of
adam@2094	3732 (L'.CApp (f, cl), loc) =>
adam@2094	3733 (case hnormCon env' f of
adam@2109	3734 (L'.CMap _, _) => isClassOrFolder' env' cl
adam@2094	3735 \| _ => false)
adam@2094	3736 \| _ => false)
adam@2094	3737 \| (L'.CConcat (c1, c2), _) =>
adam@2094	3738 shouldR c1 orelse shouldR c2
adam@2094	3739 \| c => false
adamc@1277	3740 in
adamc@1277	3741 case #1 t of
adamc@1277	3742 L'.CApp (f, _) => isClassOrFolder env' f
adam@2094	3743 \| L'.TRecord t => shouldR t
adamc@1277	3744 \| _ => false
adamc@1277	3745 end
adamc@1270	3746 in
adamc@1277	3747 if should t then
adamc@1277	3748 naddVal (nd, x)
adamc@1277	3749 else
adamc@1277	3750 nd
adamc@1264	3751 end
adamc@1264	3752 \| L'.SgiStr (x, _, s) =>
adamc@1270	3753 (case #1 (hnormSgn env' s) of
adamc@1270	3754 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264	3755 \| _ => nd)
adamc@1264	3756 \| _ => nd,
adamc@1275	3757 E.sgiBinds env' (sgi, loc)))
adamc@1275	3758 (nempty, env) sgis)
adamc@1264	3759
adamc@1264	3760 val nd = buildNeeded env sgis
adamc@1264	3761
adamc@1264	3762 fun removeUsed (nd, ds) =
adamc@1264	3763 foldl (fn ((d, _), nd) =>
adamc@634	3764 case d of
adamc@1264	3765 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264	3766 \| L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264	3767 \| L.DOpen _ => nempty
adam@1868	3768 \| L.DStr (x, _, _, (L.StrConst ds', _), _) =>
adamc@1264	3769 (case SM.find (nmods nd, x) of
adamc@1264	3770 NONE => nd
adamc@1270	3771 \| SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264	3772 \| _ => nd)
adamc@1264	3773 nd ds
adamc@1264	3774
adamc@1264	3775 val nd = removeUsed (nd, ds)
adamc@1264	3776
adam@1662	3777 (* Among the declarations present explicitly in the program, find the last constructor or constraint declaration.
adam@1662	3778 * The new constructor/constraint declarations that we add may safely be put after that point. *)
adam@1662	3779 fun findLast (ds, acc) =
adam@1662	3780 case ds of
adam@1662	3781 [] => ([], acc)
adam@1662	3782 \| (d : L.decl) :: ds' =>
adam@1662	3783 let
adam@1662	3784 val isCony = case #1 d of
adam@1662	3785 L.DCon _ => true
adam@1662	3786 \| L.DDatatype _ => true
adam@1662	3787 \| L.DDatatypeImp _ => true
adam@1662	3788 \| L.DStr _ => true
adam@1662	3789 \| L.DConstraint _ => true
adam@1662	3790 \| _ => false
adam@1662	3791 in
adam@1662	3792 if isCony then
adam@1662	3793 (ds, acc)
adam@1662	3794 else
adam@1662	3795 findLast (ds', d :: acc)
adam@1662	3796 end
adam@1662	3797
adam@1662	3798 val (dPrefix, dSuffix) = findLast (rev ds, [])
adam@1662	3799
adamc@1270	3800 fun extend (env, nd, ds) =
adamc@1264	3801 let
adamc@1264	3802 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264	3803 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264	3804 (SOME c1, SOME c2) =>
adamc@1264	3805 SOME (L.DConstraint (c1, c2), loc)
adam@1586	3806 \| _ => NONE) (nconstraints nd)
adamc@1264	3807
adamc@1264	3808 val ds' =
adamc@1264	3809 case SS.listItems (nvals nd) of
adamc@1264	3810 [] => ds'
adamc@1264	3811 \| xs =>
adamc@1264	3812 let
adamc@1264	3813 val ewild = (L.EWild, #2 str)
adamc@1264	3814 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264	3815 in
adamc@1264	3816 ds'' @ ds'
adamc@1264	3817 end
adamc@1264	3818
adamc@1275	3819 val ds' =
adam@1640	3820 case ncons nd of
adamc@1275	3821 [] => ds'
adamc@1264	3822 \| xs =>
adam@1570	3823 map (fn (x, k) =>
adamc@1270	3824 let
adamc@1270	3825 val k =
adamc@1270	3826 case decompileKind k of
adamc@1270	3827 NONE => (L.KWild, #2 str)
adamc@1270	3828 \| SOME k => k
adamc@1275	3829
adamc@1270	3830 val cwild = (L.CWild k, #2 str)
adamc@1270	3831 in
adam@1570	3832 (L.DCon (x, NONE, cwild), #2 str)
adamc@1275	3833 end) xs @ ds'
adamc@1275	3834
adamc@1275	3835 val ds = ds @ ds'
adamc@1264	3836 in
adam@1868	3837 map (fn d as (L.DStr (x, s, tm, (L.StrConst ds', loc'), r), loc) =>
adamc@1270	3838 (case SM.find (nmods nd, x) of
adamc@1270	3839 NONE => d
adamc@1270	3840 \| SOME (env, nd') =>
adam@1868	3841 (L.DStr (x, s, tm, (L.StrConst (extend (env, nd', ds')), loc'), r), loc))
adamc@1270	3842 \| d => d) ds
adamc@1264	3843 end
adamc@325	3844 in
adam@1662	3845 (L.StrConst (extend (env, nd, rev dPrefix) @ dSuffix), #2 str)
adamc@325	3846 end
adamc@325	3847 \| _ => str)
adamc@325	3848 \| _ => str
adamc@325	3849
adamc@706	3850 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255	3851 let
adamc@904	3852 (val () = preface ("elabDecl", SourcePrint.p_decl dAll))
adamc@514	3853 (val befor = Time.now ())
adamc@255	3854
adamc@255	3855 val r =
adamc@255	3856 case d of
adamc@255	3857 L.DCon (x, ko, c) =>
adamc@255	3858 let
adamc@255	3859 val k' = case ko of
adam@1639	3860 NONE => kunif env loc
adamc@623	3861 \| SOME k => elabKind env k
adamc@255	3862
adamc@255	3863 val (c', ck, gs') = elabCon (env, denv) c
adamc@255	3864 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255	3865 in
adamc@255	3866 checkKind env c' ck k';
adamc@255	3867
adamc@255	3868 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255	3869 end
adamc@805	3870 \| L.DDatatype dts =>
adamc@255	3871 let
adamc@255	3872 val k = (L'.KType, loc)
adamc@805	3873
adamc@805	3874 val (dts, env) = ListUtil.foldlMap
adamc@805	3875 (fn ((x, xs, xcs), env) =>
adamc@805	3876 let
adamc@805	3877 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805	3878 val (env, n) = E.pushCNamed env x k' NONE
adamc@805	3879 in
adamc@805	3880 ((x, n, xs, xcs), env)
adamc@805	3881 end)
adamc@805	3882 env dts
adamc@805	3883
adamc@805	3884 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805	3885 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805	3886 let
adamc@805	3887 val t = (L'.CNamed n, loc)
adamc@805	3888 val nxs = length xs - 1
adamc@805	3889 val t = ListUtil.foldli
adamc@805	3890 (fn (i, _, t) =>
adamc@805	3891 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805	3892
adamc@805	3893 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805	3894 (E.pushCRel env' x k,
adamc@805	3895 D.enter denv')) (env, denv) xs
adamc@805	3896
adamc@805	3897 val (xcs, (used, env, gs')) =
adamc@805	3898 ListUtil.foldlMap
adamc@805	3899 (fn ((x, to), (used, env, gs)) =>
adamc@805	3900 let
adamc@805	3901 val (to, t, gs') = case to of
adamc@805	3902 NONE => (NONE, t, gs)
adamc@805	3903 \| SOME t' =>
adamc@805	3904 let
adamc@805	3905 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805	3906 in
adamc@805	3907 checkKind env' t' tk k;
adamc@805	3908 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805	3909 end
adamc@805	3910 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805	3911
adamc@805	3912 val (env, n') = E.pushENamed env x t
adamc@805	3913 in
adamc@805	3914 if SS.member (used, x) then
adamc@805	3915 strError env (DuplicateConstructor (x, loc))
adamc@805	3916 else
adamc@805	3917 ();
adamc@805	3918 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805	3919 end)
adamc@805	3920 (SS.empty, env, gs') xcs
adamc@805	3921 in
adamc@805	3922 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805	3923 end)
adamc@805	3924 (env, []) dts
adamc@255	3925 in
adamc@805	3926 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255	3927 end
adamc@255	3928
adamc@255	3929 \| L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255	3930
adamc@255	3931 \| L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255	3932 (case E.lookupStr env m1 of
adamc@255	3933 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255	3934 ([], (env, denv, gs)))
adamc@255	3935 \| SOME (n, sgn) =>
adamc@255	3936 let
adamc@255	3937 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255	3938 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255	3939 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255	3940 (strerror, sgnerror))
adamc@255	3941 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255	3942 ((L'.StrVar n, loc), sgn) ms
adamc@255	3943 in
adamc@628	3944 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628	3945 (L'.CModProj (n, ms, s), _) =>
adamc@255	3946 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255	3947 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255	3948 ([], (env, denv, gs)))
adamc@255	3949 \| SOME (xs, xncs) =>
adamc@255	3950 let
adamc@255	3951 val k = (L'.KType, loc)
adamc@255	3952 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255	3953 val t = (L'.CModProj (n, ms, s), loc)
adamc@255	3954 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255	3955 val env = E.pushDatatype env n' xs xncs
adamc@255	3956
adamc@255	3957 val t = (L'.CNamed n', loc)
adamc@844	3958 val nxs = length xs
adamc@844	3959 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844	3960 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844	3961 t xs
adamc@255	3962 val env = foldl (fn ((x, n, to), env) =>
adamc@255	3963 let
adamc@255	3964 val t = case to of
adamc@255	3965 NONE => t
adamc@255	3966 \| SOME t' => (L'.TFun (t', t), loc)
adamc@255	3967
adamc@255	3968 val t = foldr (fn (x, t) =>
adamc@255	3969 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255	3970 t xs
adamc@255	3971 in
adamc@255	3972 E.pushENamedAs env x n t
adamc@255	3973 end) env xncs
adamc@255	3974 in
adamc@628	3975 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255	3976 end)
adamc@255	3977 \| _ => (strError env (NotDatatype loc);
adamc@255	3978 ([], (env, denv, [])))
adamc@255	3979 end)
adamc@255	3980
adamc@255	3981 \| L.DVal (x, co, e) =>
adamc@255	3982 let
adamc@255	3983 val (c', _, gs1) = case co of
adam@1639	3984 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255	3985 \| SOME c => elabCon (env, denv) c
adamc@255	3986
adamc@255	3987 val (e', et, gs2) = elabExp (env, denv) e
adamc@629	3988
adamc@629	3989 val () = checkCon env e' et c'
adamc@629	3990
adamc@674	3991 val c' = normClassConstraint env c'
adamc@255	3992 val (env', n) = E.pushENamed env x c'
adamc@255	3993 in
adamc@255	3994 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362	3995 ("c'", p_con env c')];*)
adamc@628	3996 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255	3997 end
adamc@255	3998 \| L.DValRec vis =>
adamc@255	3999 let
adamc@255	4000 fun allowable (e, _) =
adamc@255	4001 case e of
adamc@255	4002 L.EAbs _ => true
adamc@255	4003 \| L.ECAbs (_, _, _, e) => allowable e
adamc@623	4004 \| L.EKAbs (_, e) => allowable e
adamc@255	4005 \| L.EDisjoint (_, _, e) => allowable e
adamc@255	4006 \| _ => false
adamc@255	4007
adamc@255	4008 val (vis, gs) = ListUtil.foldlMap
adamc@255	4009 (fn ((x, co, e), gs) =>
adamc@255	4010 let
adamc@255	4011 val (c', _, gs1) = case co of
adam@1639	4012 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255	4013 \| SOME c => elabCon (env, denv) c
adamc@674	4014 val c' = normClassConstraint env c'
adamc@255	4015 in
adamc@255	4016 ((x, c', e), enD gs1 @ gs)
adamc@280	4017 end) gs vis
adamc@255	4018
adamc@255	4019 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255	4020 let
adamc@255	4021 val (env, n) = E.pushENamed env x c'
adamc@255	4022 in
adamc@255	4023 ((x, n, c', e), env)
adamc@255	4024 end) env vis
adamc@255	4025
adamc@255	4026 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255	4027 let
adamc@255	4028 val (e', et, gs1) = elabExp (env, denv) e
adamc@255	4029 in
adamc@628	4030 checkCon env e' et c';
adamc@255	4031 if allowable e then
adamc@255	4032 ()
adamc@255	4033 else
adamc@255	4034 expError env (IllegalRec (x, e'));
adamc@628	4035 ((x, n, c', e'), gs1 @ gs)
adamc@255	4036 end) gs vis
adam@1736	4037
adam@1736	4038 val vis = map (fn (x, n, t, e) => (x, n, normClassConstraint env t, e)) vis
adam@1736	4039 val d = (L'.DValRec vis, loc)
adamc@255	4040 in
adam@1736	4041 ([d], (E.declBinds env d, denv, gs))
adamc@255	4042 end
adamc@255	4043
adamc@255	4044 \| L.DSgn (x, sgn) =>
adamc@255	4045 let
adamc@255	4046 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255	4047 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255	4048 in
adamc@255	4049 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255	4050 end
adamc@255	4051
adam@1868	4052 \| L.DStr (x, sgno, tmo, str, _) =>
adam@1732	4053 (case ModDb.lookup dAll of
adam@1732	4054 SOME d =>
adam@1732	4055 let
adam@1744	4056 val () = if !verbose then TextIO.print ("REUSE: " ^ x ^ "\n") else ()
adam@1732	4057 val env' = E.declBinds env d
adam@1732	4058 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732	4059 in
adam@1738	4060 ([d], (env', denv', gs))
adam@1732	4061 end
adam@1732	4062 \| NONE =>
adam@1732	4063 let
adam@1744	4064 val () = if !verbose then TextIO.print ("CHECK: " ^ x ^ "\n") else ()
adam@1744	4065
adam@1732	4066 val () = if x = "Basis" then
adam@1732	4067 raise Fail "Not allowed to redefine structure 'Basis'"
adam@1732	4068 else
adam@1732	4069 ()
adam@1732	4070
adam@1732	4071 val formal = Option.map (elabSgn (env, denv)) sgno
adam@1732	4072
adam@1732	4073 val (str', sgn', gs') =
adam@1732	4074 case formal of
adam@1732	4075 NONE =>
adam@1732	4076 let
adam@1732	4077 val (str', actual, gs') = elabStr (env, denv) str
adam@1732	4078 in
adam@1732	4079 (str', selfifyAt env {str = str', sgn = actual}, gs')
adam@1732	4080 end
adam@1732	4081 \| SOME (formal, gs1) =>
adam@1732	4082 let
adam@1732	4083 val str = wildifyStr env (str, formal)
adam@1732	4084 val (str', actual, gs2) = elabStr (env, denv) str
adam@1732	4085 in
adam@1732	4086 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adam@1732	4087 (str', formal, enD gs1 @ gs2)
adam@1732	4088 end
adam@1732	4089
adam@1732	4090 val (env', n) = E.pushStrNamed env x sgn'
adam@1883	4091
adam@1732	4092 val denv' =
adam@1732	4093 case #1 str' of
adam@1732	4094 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732	4095 \| L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732	4096 \| _ => denv
adam@1732	4097
adam@1732	4098 val dNew = (L'.DStr (x, n, sgn', str'), loc)
adam@1732	4099 in
adam@1732	4100 case #1 (hnormSgn env sgn') of
adam@1732	4101 L'.SgnFun _ =>
adam@1732	4102 (case #1 str' of
adam@1732	4103 L'.StrFun _ => ()
adam@1732	4104 \| _ => strError env (FunctorRebind loc))
adam@1732	4105 \| _ => ();
adam@1732	4106 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732	4107 ([dNew], (env', denv', gs' @ gs))
adam@1732	4108 end)
adam@1732	4109
adam@1733	4110 \| L.DFfiStr (x, sgn, tmo) =>
adam@1732	4111 (case ModDb.lookup dAll of
adam@1732	4112 SOME d =>
adam@1732	4113 let
adam@1732	4114 val env' = E.declBinds env d
adam@1732	4115 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732	4116 in
adam@1732	4117 ([d], (env', denv', []))
adam@1732	4118 end
adam@1732	4119 \| NONE =>
adam@1732	4120 let
adam@1732	4121 val (sgn', gs') = elabSgn (env, denv) sgn
adam@1732	4122
adam@1732	4123 val (env', n) = E.pushStrNamed env x sgn'
adam@1732	4124
adam@1732	4125 val dNew = (L'.DFfiStr (x, n, sgn'), loc)
adam@1732	4126 in
adam@2173	4127 case #1 sgn' of
adam@2173	4128 L'.SgnConst sgis =>
adam@2173	4129 (case List.find (fn (L'.SgiConAbs _, _) => false
adam@2173	4130 \| (L'.SgiCon _, _) => false
adam@2173	4131 \| (L'.SgiDatatype _, _) => false
adam@2173	4132 \| (L'.SgiVal _, _) => false
adam@2173	4133 \| _ => true) sgis of
adam@2173	4134 NONE => ()
adam@2173	4135 \| SOME sgi => (ErrorMsg.errorAt loc "Disallowed signature item for FFI module";
adam@2173	4136 epreface ("item", p_sgn_item env sgi)))
adam@2173	4137 \| _ => raise Fail "FFI signature isn't SgnConst";
adam@2173	4138
adam@1733	4139 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732	4140 ([dNew], (env', denv, enD gs' @ gs))
adam@1732	4141 end)
adamc@255	4142
adamc@255	4143 \| L.DOpen (m, ms) =>
adamc@255	4144 (case E.lookupStr env m of
adamc@255	4145 NONE => (strError env (UnboundStr (loc, m));
adamc@255	4146 ([], (env, denv, gs)))
adamc@255	4147 \| SOME (n, sgn) =>
adamc@255	4148 let
adamc@1030	4149 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030	4150 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030	4151 NONE => (strError env (UnboundStr (loc, m));
adamc@1030	4152 (strerror, sgnerror))
adamc@1030	4153 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030	4154 ((L'.StrVar n, loc), sgn) ms
adamc@1030	4155
adamc@1030	4156 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255	4157
adamc@628	4158 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628	4159 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255	4160 in
adamc@255	4161 (ds, (env', denv', gs))
adamc@255	4162 end)
adamc@255	4163
adamc@255	4164 \| L.DConstraint (c1, c2) =>
adamc@255	4165 let
adamc@255	4166 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255	4167 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255	4168 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255	4169
adamc@628	4170 val denv' = D.assert env denv (c1', c2')
adamc@255	4171 in
adam@1639	4172 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639	4173 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@255	4174
adamc@628	4175 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255	4176 end
adamc@255	4177
adamc@255	4178 \| L.DOpenConstraints (m, ms) =>
adamc@255	4179 let
adamc@255	4180 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255	4181 in
adamc@255	4182 ([], (env, denv, gs))
adamc@255	4183 end
adamc@255	4184
adamc@255	4185 \| L.DExport str =>
adamc@255	4186 let
adamc@255	4187 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255	4188
adamc@255	4189 val sgn =
adamc@255	4190 case #1 (hnormSgn env sgn) of
adamc@255	4191 L'.SgnConst sgis =>
adamc@255	4192 let
adamc@255	4193 fun doOne (all as (sgi, _), env) =
adamc@255	4194 (case sgi of
adamc@255	4195 L'.SgiVal (x, n, t) =>
adamc@325	4196 let
adamc@325	4197 fun doPage (makeRes, ran) =
adamc@628	4198 case hnormCon env ran of
adamc@628	4199 (L'.CApp (tf, arg), _) =>
adamc@628	4200 (case (hnormCon env tf, hnormCon env arg) of
adamc@628	4201 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720	4202 (L'.CApp (tf, arg3), _)) =>
adamc@325	4203 (case (basis = !basis_r,
adamc@720	4204 hnormCon env tf, hnormCon env arg3) of
adamc@325	4205 (true,
adamc@720	4206 (L'.CApp (tf, arg2), _),
adamc@628	4207 ((L'.CRecord (_, []), _))) =>
adamc@720	4208 (case (hnormCon env tf) of
adamc@720	4209 (L'.CApp (tf, arg1), _) =>
adamc@720	4210 (case (hnormCon env tf,
adamc@720	4211 hnormCon env arg1,
adamc@720	4212 hnormCon env arg2) of
adamc@720	4213 (tf, arg1,
adamc@720	4214 (L'.CRecord (_, []), _)) =>
adamc@720	4215 let
adamc@720	4216 val t = (L'.CApp (tf, arg1), loc)
adamc@720	4217 val t = (L'.CApp (t, arg2), loc)
adamc@720	4218 val t = (L'.CApp (t, arg3), loc)
adamc@720	4219 val t = (L'.CApp (
adamc@720	4220 (L'.CModProj
adamc@720	4221 (basis, [], "transaction"), loc),
adamc@325	4222 t), loc)
adam@1347	4223
adam@1347	4224 fun normArgs t =
adam@1347	4225 case hnormCon env t of
adam@1347	4226 (L'.TFun (dom, ran), loc) =>
adam@1347	4227 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347	4228 \| t' => t'
adamc@720	4229 in
adam@1347	4230 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720	4231 end
adamc@325	4232 \| _ => all)
adamc@325	4233 \| _ => all)
adamc@325	4234 \| _ => all)
adamc@325	4235 \| _ => all)
adamc@325	4236 \| _ => all
adamc@325	4237 in
adamc@628	4238 case hnormCon env t of
adamc@628	4239 (L'.TFun (dom, ran), _) =>
adamc@628	4240 (case hnormCon env dom of
adamc@628	4241 (L'.TRecord domR, _) =>
adamc@325	4242 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325	4243 loc),
adamc@325	4244 t), loc), ran)
adamc@325	4245 \| _ => all)
adamc@325	4246 \| _ => doPage (fn t => t, t)
adamc@325	4247 end
adamc@255	4248 \| _ => all,
adamc@255	4249 E.sgiBinds env all)
adamc@255	4250 in
adamc@255	4251 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255	4252 end
adamc@255	4253 \| _ => sgn
adamc@255	4254 in
adamc@255	4255 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255	4256 end
adamc@255	4257
adamc@707	4258 \| L.DTable (x, c, pe, ce) =>
adamc@255	4259 let
adamc@707	4260 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707	4261
adamc@255	4262 val (c', k, gs') = elabCon (env, denv) c
adam@1639	4263 val pkey = cunif env (loc, cstK)
adam@1639	4264 val uniques = cunif env (loc, cstK)
adamc@705	4265
adamc@705	4266 val ct = tableOf ()
adamc@705	4267 val ct = (L'.CApp (ct, c'), loc)
adamc@707	4268 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705	4269
adamc@705	4270 val (env, n) = E.pushENamed env x ct
adamc@707	4271 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707	4272 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707	4273
adamc@707	4274 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707	4275 val pst = (L'.CApp (pst, c'), loc)
adamc@707	4276 val pst = (L'.CApp (pst, pkey), loc)
adamc@704	4277
adamc@704	4278 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704	4279 val cst = (L'.CApp (cst, c'), loc)
adamc@705	4280 val cst = (L'.CApp (cst, uniques), loc)
adamc@255	4281 in
adamc@255	4282 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707	4283 checkCon env pe' pet pst;
adamc@707	4284 checkCon env ce' cet cst;
adamc@707	4285 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707	4286 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255	4287 end
adamc@338	4288 \| L.DSequence x =>
adamc@338	4289 let
adamc@338	4290 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338	4291 in
adamc@338	4292 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338	4293 end
adamc@754	4294 \| L.DView (x, e) =>
adamc@754	4295 let
adamc@754	4296 val (e', t, gs') = elabExp (env, denv) e
adamc@754	4297
adamc@754	4298 val k = (L'.KRecord (L'.KType, loc), loc)
adam@1639	4299 val fs = cunif env (loc, k)
adam@1639	4300 val ts = cunif env (loc, (L'.KRecord k, loc))
adamc@754	4301 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754	4302 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754	4303 val ts = (L'.CApp (tf, ts), loc)
adamc@754	4304
adamc@754	4305 val cv = viewOf ()
adamc@754	4306 val cv = (L'.CApp (cv, fs), loc)
adamc@754	4307 val (env', n) = E.pushENamed env x cv
adamc@754	4308
adamc@754	4309 val ct = queryOf ()
adamc@1191	4310 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395	4311 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754	4312 val ct = (L'.CApp (ct, ts), loc)
adamc@754	4313 val ct = (L'.CApp (ct, fs), loc)
adamc@754	4314 in
adamc@754	4315 checkCon env e' t ct;
adamc@754	4316 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754	4317 (env', denv, gs' @ gs))
adamc@754	4318 end
adamc@255	4319
adamc@280	4320 \| L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280	4321
adamc@459	4322 \| L.DCookie (x, c) =>
adamc@459	4323 let
adamc@459	4324 val (c', k, gs') = elabCon (env, denv) c
adamc@459	4325 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459	4326 in
adamc@459	4327 checkKind env c' k (L'.KType, loc);
adamc@459	4328 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459	4329 end
adamc@720	4330 \| L.DStyle x =>
adamc@718	4331 let
adamc@720	4332 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718	4333 in
adamc@720	4334 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718	4335 end
adamc@1075	4336 \| L.DTask (e1, e2) =>
adamc@1073	4337 let
adamc@1075	4338 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075	4339 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075	4340
adam@1639	4341 val targ = cunif env (loc, (L'.KType, loc))
adam@1348	4342
adamc@1075	4343 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348	4344 val t1' = (L'.CApp (t1', targ), loc)
adam@1348	4345
adamc@1075	4346 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075	4347 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348	4348 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073	4349 in
adamc@1075	4350 checkCon env e1' t1 t1';
adamc@1075	4351 checkCon env e2' t2 t2';
adamc@1075	4352 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073	4353 end
adamc@1199	4354 \| L.DPolicy e1 =>
adamc@1199	4355 let
adamc@1199	4356 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199	4357
adamc@1199	4358 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199	4359 in
adamc@1199	4360 checkCon env e1' t1 t1';
adamc@1199	4361 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199	4362 end
adamc@459	4363
adam@1294	4364 \| L.DOnError (m1, ms, s) =>
adam@1294	4365 (case E.lookupStr env m1 of
adam@1294	4366 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294	4367 ([], (env, denv, [])))
adam@1294	4368 \| SOME (n, sgn) =>
adam@1294	4369 let
adam@1294	4370 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294	4371 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294	4372 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294	4373 (strerror, sgnerror))
adam@1294	4374 \| SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294	4375 ((L'.StrVar n, loc), sgn) ms
adam@1294	4376
adam@1294	4377 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294	4378 NONE => (expError env (UnboundExp (loc, s));
adam@1294	4379 cerror)
adam@1294	4380 \| SOME t => t
adam@1294	4381
adam@1294	4382 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294	4383 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294	4384 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294	4385 in
adam@1407	4386 (unifyCons env loc t func
adam@1407	4387 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294	4388 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294	4389 end)
adam@1294	4390
adam@2010	4391 \| L.DFfi (x, modes, t) =>
adam@2010	4392 let
adam@2010	4393 val () = if Settings.getLessSafeFfi () then
adam@2010	4394 ()
adam@2010	4395 else
adam@2010	4396 ErrorMsg.errorAt loc "To enable 'ffi' declarations, the .urp directive 'lessSafeFfi' is mandatory."
adam@2010	4397
adam@2010	4398 val (t', _, gs1) = elabCon (env, denv) t
adam@2010	4399 val t' = normClassConstraint env t'
adam@2010	4400 val (env', n) = E.pushENamed env x t'
adam@2010	4401 in
adam@2010	4402 ([(L'.DFfi (x, n, modes, t'), loc)], (env', denv, enD gs1 @ gs))
adam@2010	4403 end
adam@2010	4404
adamc@280	4405 (val tcs = List.filter (fn TypeClass _ => true \| _ => false) (#3 (#2 r)))
adamc@255	4406 in
adam@1989	4407 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll),
adam@1989	4408 ("d'", p_list_sep PD.newline (ElabPrint.p_decl env) (#1 r))];*)
adamc@255	4409 r
adamc@255	4410 end
adamc@211	4411
adamc@83	4412 and elabStr (env, denv) (str, loc) =
adamc@31	4413 case str of
adamc@31	4414 L.StrConst ds =>
adamc@31	4415 let
adamc@88	4416 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123	4417 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63	4418
adamc@63	4419 val (sgis, _, _, _, _) =
adamc@64	4420 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63	4421 case sgi of
adamc@64	4422 L'.SgiConAbs (x, n, k) =>
adamc@64	4423 let
adamc@64	4424 val (cons, x) =
adamc@64	4425 if SS.member (cons, x) then
adamc@64	4426 (cons, "?" ^ x)
adamc@64	4427 else
adamc@64	4428 (SS.add (cons, x), x)
adamc@64	4429 in
adamc@64	4430 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4431 end
adamc@64	4432 \| L'.SgiCon (x, n, k, c) =>
adamc@64	4433 let
adamc@64	4434 val (cons, x) =
adamc@64	4435 if SS.member (cons, x) then
adamc@64	4436 (cons, "?" ^ x)
adamc@64	4437 else
adamc@64	4438 (SS.add (cons, x), x)
adamc@64	4439 in
adamc@64	4440 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4441 end
adamc@805	4442 \| L'.SgiDatatype dts =>
adamc@156	4443 let
adamc@805	4444 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805	4445 let
adamc@805	4446 val (cons, x) =
adamc@805	4447 if SS.member (cons, x) then
adamc@805	4448 (cons, "?" ^ x)
adamc@156	4449 else
adamc@805	4450 (SS.add (cons, x), x)
adamc@805	4451
adamc@805	4452 val (xncs, vals) =
adamc@805	4453 ListUtil.foldlMap
adamc@805	4454 (fn ((x, n, t), vals) =>
adamc@805	4455 if SS.member (vals, x) then
adamc@805	4456 (("?" ^ x, n, t), vals)
adamc@805	4457 else
adamc@805	4458 ((x, n, t), SS.add (vals, x)))
adamc@805	4459 vals xncs
adamc@805	4460 in
adamc@805	4461 ((x, n, xs, xncs), (cons, vals))
adamc@805	4462 end
adamc@805	4463
adamc@805	4464 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156	4465 in
adamc@805	4466 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4467 end
adamc@191	4468 \| L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156	4469 let
adamc@156	4470 val (cons, x) =
adamc@156	4471 if SS.member (cons, x) then
adamc@156	4472 (cons, "?" ^ x)
adamc@156	4473 else
adamc@156	4474 (SS.add (cons, x), x)
adamc@156	4475 in
adamc@191	4476 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156	4477 end
adamc@64	4478 \| L'.SgiVal (x, n, c) =>
adamc@64	4479 let
adamc@64	4480 val (vals, x) =
adamc@64	4481 if SS.member (vals, x) then
adamc@64	4482 (vals, "?" ^ x)
adamc@64	4483 else
adamc@64	4484 (SS.add (vals, x), x)
adamc@64	4485 in
adamc@64	4486 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4487 end
adamc@64	4488 \| L'.SgiSgn (x, n, sgn) =>
adamc@64	4489 let
adamc@64	4490 val (sgns, x) =
adamc@64	4491 if SS.member (sgns, x) then
adamc@64	4492 (sgns, "?" ^ x)
adamc@64	4493 else
adamc@64	4494 (SS.add (sgns, x), x)
adamc@64	4495 in
adamc@64	4496 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64	4497 end
adamc@64	4498
adamc@64	4499 \| L'.SgiStr (x, n, sgn) =>
adamc@64	4500 let
adamc@64	4501 val (strs, x) =
adamc@64	4502 if SS.member (strs, x) then
adamc@64	4503 (strs, "?" ^ x)
adamc@64	4504 else
adamc@64	4505 (SS.add (strs, x), x)
adamc@64	4506 in
adamc@64	4507 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88	4508 end
adamc@203	4509 \| L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563	4510 \| L'.SgiClassAbs (x, n, k) =>
adamc@211	4511 let
adamc@211	4512 val (cons, x) =
adamc@211	4513 if SS.member (cons, x) then
adamc@211	4514 (cons, "?" ^ x)
adamc@211	4515 else
adamc@211	4516 (SS.add (cons, x), x)
adamc@211	4517 in
adamc@563	4518 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211	4519 end
adamc@563	4520 \| L'.SgiClass (x, n, k, c) =>
adamc@211	4521 let
adamc@211	4522 val (cons, x) =
adamc@211	4523 if SS.member (cons, x) then
adamc@211	4524 (cons, "?" ^ x)
adamc@211	4525 else
adamc@211	4526 (SS.add (cons, x), x)
adamc@211	4527 in
adamc@563	4528 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203	4529 end)
adamc@64	4530
adamc@63	4531 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31	4532 in
adamc@83	4533 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31	4534 end
adamc@31	4535 \| L.StrVar x =>
adamc@31	4536 (case E.lookupStr env x of
adamc@31	4537 NONE =>
adamc@31	4538 (strError env (UnboundStr (loc, x));
adamc@83	4539 (strerror, sgnerror, []))
adamc@83	4540 \| SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34	4541 \| L.StrProj (str, x) =>
adamc@34	4542 let
adamc@83	4543 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34	4544 in
adamc@34	4545 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34	4546 NONE => (strError env (UnboundStr (loc, x));
adamc@83	4547 (strerror, sgnerror, []))
adamc@83	4548 \| SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34	4549 end
adamc@41	4550 \| L.StrFun (m, dom, ranO, str) =>
adamc@41	4551 let
adamc@83	4552 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41	4553 val (env', n) = E.pushStrNamed env m dom'
adamc@834	4554 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834	4555 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41	4556
adamc@83	4557 val (formal, gs3) =
adamc@41	4558 case ranO of
adamc@83	4559 NONE => (actual, [])
adamc@41	4560 \| SOME ran =>
adamc@41	4561 let
adamc@834	4562 val (ran', gs) = elabSgn (env', denv') ran
adamc@41	4563 in
adamc@1000	4564 subSgn env' loc actual ran';
adamc@83	4565 (ran', gs)
adamc@41	4566 end
adamc@41	4567 in
adamc@41	4568 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83	4569 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228	4570 enD gs1 @ gs2 @ enD gs3)
adamc@41	4571 end
adamc@44	4572 \| L.StrApp (str1, str2) =>
adamc@44	4573 let
adamc@83	4574 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325	4575 val str2 =
adamc@325	4576 case sgn1 of
adamc@325	4577 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275	4578 let
adamc@1275	4579 val s = wildifyStr env (str2, dom)
adamc@1275	4580 in
adamc@1275	4581 (Print.preface ("Wild", SourcePrint.p_str s);)
adamc@1275	4582 s
adamc@1275	4583 end
adamc@325	4584 \| _ => str2
adamc@83	4585 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270	4586 in
adamc@44	4587 case #1 (hnormSgn env sgn1) of
adamc@83	4588 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4589 \| L'.SgnFun (m, n, dom, ran) =>
adamc@1000	4590 (subSgn env loc sgn2 dom;
adamc@44	4591 case #1 (hnormSgn env ran) of
adamc@83	4592 L'.SgnError => (strerror, sgnerror, [])
adamc@44	4593 \| L'.SgnConst sgis =>
adam@1968	4594 let
adam@1968	4595 (* This code handles a tricky case that led to a very nasty bug.
adam@1968	4596 * An invariant about signatures of elaborated modules is that no
adam@1968	4597 * identifier that could appear directly in a program is defined
adam@1968	4598 * twice. We add "?" in front of identifiers where necessary to
adam@1968	4599 * maintain the invariant, but the code below, to extend a functor
adam@1968	4600 * body with a binding for the functor argument, wasn't written
adam@1968	4601 * with the invariant in mind. Luckily for us, references to
adam@1968	4602 * an identifier later within a signature work by globally
adam@1968	4603 * unique index, so we just need to change the string name in the
adam@1989	4604 * new declaration.
adam@1989	4605 *
adam@1989	4606 * ~~~ A few days later.... ~~~
adam@1989	4607 * This is trickier than I thought! We might need to add
adam@1989	4608 * arbitarily many question marks before the module name to
adam@1989	4609 * avoid a clash, since some other code might depend on
adam@1989	4610 * question-mark identifiers generated previously by this
adam@1989	4611 * very code fragment. *)
adam@1989	4612 fun mungeName m =
adam@1968	4613 if List.exists (fn (L'.SgiStr (x, _, _), _) => x = m
adam@1968	4614 \| _ => false) sgis then
adam@1989	4615 mungeName ("?" ^ m)
adam@1968	4616 else
adam@1968	4617 m
adam@1989	4618
adam@1989	4619 val m = mungeName m
adam@1968	4620 in
adam@1968	4621 ((L'.StrApp (str1', str2'), loc),
adam@1968	4622 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adam@1968	4623 gs1 @ gs2)
adam@1968	4624 end
adamc@44	4625 \| _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44	4626 \| _ => (strError env (NotFunctor sgn1);
adamc@83	4627 (strerror, sgnerror, []))
adamc@44	4628 end
adamc@31	4629
adamc@987	4630 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833	4631
adam@1732	4632 fun elabFile basis basis_tm topStr topSgn top_tm env file =
adamc@56	4633 let
adam@1737	4634 val () = ModDb.snapshot ()
adam@1737	4635
adamc@713	4636 val () = mayDelay := true
adamc@713	4637 val () = delayedUnifs := []
adamc@830	4638 val () = delayedExhaustives := []
adamc@713	4639
adam@1733	4640 val d = (L.DFfiStr ("Basis", (L.SgnConst basis, ErrorMsg.dummySpan), SOME basis_tm), ErrorMsg.dummySpan)
adam@1732	4641 val (basis_n, env', sgn) =
adam@1733	4642 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732	4643 NONE =>
adam@1732	4644 let
adam@1732	4645 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adam@1732	4646 val () = case gs of
adam@1732	4647 [] => ()
adam@1732	4648 \| _ => (app (fn (_, env, _, c1, c2) =>
adam@1732	4649 prefaces "Unresolved"
adam@1732	4650 [("c1", p_con env c1),
adam@1732	4651 ("c2", p_con env c2)]) gs;
adam@1732	4652 raise Fail "Unresolved disjointness constraints in Basis")
adam@1732	4653
adam@1732	4654 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adam@1732	4655 in
adam@1732	4656 ModDb.insert ((L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan), basis_tm);
adam@1732	4657 (basis_n, env', sgn)
adam@1732	4658 end
adam@1732	4659 \| SOME (d' as (L'.DFfiStr (_, basis_n, sgn), _)) =>
adam@1732	4660 (basis_n, E.pushStrNamedAs env "Basis" basis_n sgn, sgn)
adam@1732	4661 \| _ => raise Fail "Elaborate: Basis impossible"
adam@1732	4662
adamc@210	4663 val () = basis_r := basis_n
adamc@628	4664 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56	4665
adamc@56	4666 fun discoverC r x =
adamc@56	4667 case E.lookupC env' x of
adamc@56	4668 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56	4669 \| E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56	4670 \| E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56	4671
adamc@56	4672 val () = discoverC int "int"
adamc@56	4673 val () = discoverC float "float"
adamc@56	4674 val () = discoverC string "string"
adamc@821	4675 val () = discoverC char "char"
adamc@203	4676 val () = discoverC table "sql_table"
adamc@56	4677
adam@1732	4678 val d = (L.DStr ("Top", SOME (L.SgnConst topSgn, ErrorMsg.dummySpan),
adam@1732	4679 SOME (if Time.< (top_tm, basis_tm) then basis_tm else top_tm),
adam@1868	4680 (L.StrConst topStr, ErrorMsg.dummySpan), false), ErrorMsg.dummySpan)
adam@1732	4681 val (top_n, env', topSgn, topStr) =
adam@1733	4682 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732	4683 NONE =>
adam@1732	4684 let
adam@1732	4685 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adam@1732	4686 val () = case gs of
adam@1732	4687 [] => ()
adam@1732	4688 \| _ => raise Fail "Unresolved disjointness constraints in top.urs"
adam@1732	4689 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adam@1732	4690
adam@1732	4691 val () = case gs of
adam@1732	4692 [] => ()
adam@1732	4693 \| _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1732	4694 (case D.prove env denv (c1, c2, loc) of
adam@1732	4695 [] => ()
adam@1732	4696 \| _ =>
adam@1732	4697 (prefaces "Unresolved constraint in top.ur"
adam@1732	4698 [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1732	4699 ("c1", p_con env c1),
adam@1732	4700 ("c2", p_con env c2)];
adam@1732	4701 raise Fail "Unresolved constraint in top.ur"))
adam@1732	4702 \| TypeClass (env, c, r, loc) =>
adam@1732	4703 let
adam@1732	4704 val c = normClassKey env c
adam@1732	4705 in
adam@1732	4706 case resolveClass env c of
adam@1732	4707 SOME e => r := SOME e
adam@1732	4708 \| NONE => expError env (Unresolvable (loc, c))
adam@1732	4709 end) gs
adam@1732	4710
adam@1732	4711 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adam@1732	4712
adam@1732	4713 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adam@1732	4714 in
adam@1732	4715 ModDb.insert ((L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan), top_tm);
adam@1732	4716 (top_n, env', topSgn, topStr)
adam@1732	4717 end
adam@1732	4718 \| SOME (d' as (L'.DStr (_, top_n, topSgn, topStr), _)) =>
adam@1732	4719 (top_n, E.declBinds env' d', topSgn, topStr)
adam@1732	4720 \| _ => raise Fail "Elaborate: Top impossible"
adam@1732	4721
adamc@633	4722 val () = top_r := top_n
adamc@325	4723
adamc@628	4724 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325	4725
adam@1883	4726 fun elabDecl' x =
adam@1883	4727 (resetKunif ();
adam@1883	4728 resetCunif ();
adam@1883	4729 elabDecl x)
adam@1883	4730
adam@1883	4731 val (file, (env'', _, gs)) = ListUtil.foldlMapConcat elabDecl' (env', D.empty, []) file
adamc@753	4732
adamc@777	4733 fun oneSummaryRound () =
adamc@777	4734 if ErrorMsg.anyErrors () then
adamc@777	4735 ()
adamc@777	4736 else
adamc@777	4737 let
adamc@777	4738 val delayed = !delayedUnifs
adamc@777	4739 in
adamc@777	4740 delayedUnifs := [];
adamc@777	4741 app (fn (loc, env, k, s1, s2) =>
adamc@777	4742 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777	4743 delayed
adamc@777	4744 end
adam@1576	4745
adam@1576	4746 val checkConstraintErrors = ref (fn () => ())
adam@1723	4747 fun stopHere () = not (!unifyMore) andalso ErrorMsg.anyErrors ()
adamc@56	4748 in
adamc@777	4749 oneSummaryRound ();
adamc@753	4750
adam@1723	4751 if stopHere () then
adamc@753	4752 ()
adamc@753	4753 else
adamc@753	4754 let
adam@1767	4755 fun solver (gs : constraint list) =
adamc@753	4756 let
adamc@753	4757 val (gs, solved) =
adamc@753	4758 ListUtil.foldlMapPartial
adam@1767	4759 (fn (g : constraint, solved) =>
adamc@753	4760 case g of
adamc@753	4761 Disjoint (loc, env, denv, c1, c2) =>
adamc@753	4762 (case D.prove env denv (c1, c2, loc) of
adamc@753	4763 [] => (NONE, true)
adamc@753	4764 \| _ => (SOME g, solved))
adamc@753	4765 \| TypeClass (env, c, r, loc) =>
adamc@753	4766 let
adamc@753	4767 fun default () = (SOME g, solved)
adam@1767	4768
adam@1767	4769 fun resolver r c =
adam@1767	4770 let
adam@1767	4771 val c = normClassKey env c
adam@1767	4772 in
adam@1767	4773 case resolveClass env c of
adam@1767	4774 SOME e => (r := SOME e;
adam@1767	4775 (NONE, true))
adam@1767	4776 \| NONE =>
adam@1767	4777 case #1 (hnormCon env c) of
adam@1767	4778 L'.CApp (f, x) =>
adam@1767	4779 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adam@1767	4780 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adam@1767	4781 (case #1 (hnormCon env f) of
adam@1767	4782 L'.CModProj (top_n', [], "folder") =>
adam@1767	4783 if top_n' = top_n then
adam@1767	4784 let
adam@1767	4785 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adam@1767	4786 val e = (L'.EKApp (e, k), loc)
adam@1767	4787
adam@1767	4788 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adam@1767	4789 let
adam@1767	4790 val e = (L'.EModProj (top_n, ["Folder"],
adam@1767	4791 "cons"), loc)
adam@1767	4792 val e = (L'.EKApp (e, k), loc)
adam@1767	4793 val e = (L'.ECApp (e,
adam@1767	4794 (L'.CRecord (k, xcs),
adam@1767	4795 loc)), loc)
adam@1767	4796 val e = (L'.ECApp (e, x), loc)
adam@1767	4797 val e = (L'.ECApp (e, c), loc)
adam@1767	4798 val e = (L'.EApp (e, folder), loc)
adam@1767	4799 in
adam@1767	4800 (e, (x, c) :: xcs)
adam@1767	4801 end)
adam@1767	4802 (e, []) xcs
adam@1767	4803 in
adam@1767	4804 (r := SOME folder;
adam@1767	4805 (NONE, true))
adam@1767	4806 end
adam@1767	4807 else
adam@1767	4808 default ()
adam@1767	4809 \| _ => default ())
adam@1767	4810 \| _ => default ())
adam@1767	4811
adam@1767	4812 \| L'.TRecord c' =>
adam@1767	4813 (case #1 (hnormCon env c') of
adam@1767	4814 L'.CRecord (_, xts) =>
adam@1767	4815 let
adam@1767	4816 val witnesses = map (fn (x, t) =>
adam@1767	4817 let
adam@1767	4818 val r = ref NONE
adam@1767	4819 val (opt, _) = resolver r t
adam@1767	4820 in
adam@1767	4821 case opt of
adam@1767	4822 SOME _ => NONE
adam@1767	4823 \| NONE =>
adam@1767	4824 case !r of
adam@1767	4825 NONE => NONE
adam@1767	4826 \| SOME e =>
adam@1767	4827 SOME (x, e, t)
adam@1767	4828 end) xts
adam@1767	4829 in
adam@1767	4830 if List.all Option.isSome witnesses then
adam@1767	4831 (r := SOME (L'.ERecord (map valOf witnesses), loc);
adam@1767	4832 (NONE, true))
adam@1767	4833 else
adam@1767	4834 (SOME g, solved)
adam@1767	4835 end
adam@1767	4836 \| _ => (SOME g, solved))
adam@1767	4837
adam@1767	4838 \| _ => default ()
adam@1767	4839 end
adamc@753	4840 in
adam@1767	4841 resolver r c
adamc@753	4842 end)
adamc@753	4843 false gs
adamc@753	4844 in
adamc@753	4845 case (gs, solved) of
adamc@753	4846 ([], _) => ()
adamc@777	4847 \| (_, true) => (oneSummaryRound (); solver gs)
adamc@753	4848 \| _ =>
adam@1576	4849 checkConstraintErrors :=
adam@1576	4850 (fn () => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1576	4851 let
adam@1576	4852 val c1' = ElabOps.hnormCon env c1
adam@1576	4853 val c2' = ElabOps.hnormCon env c2
adam@1576	4854
adam@1576	4855 fun isUnif (c, _) =
adam@1576	4856 case c of
adam@1576	4857 L'.CUnif _ => true
adam@1576	4858 \| _ => false
adam@1576	4859
adam@1576	4860 fun maybeAttr (c, _) =
adam@1576	4861 case c of
adam@1576	4862 L'.CRecord ((L'.KType, _), xts) => true
adam@1576	4863 \| _ => false
adam@1576	4864 in
adam@1576	4865 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adam@1576	4866 eprefaces' [("Con 1", p_con env c1),
adam@1576	4867 ("Con 2", p_con env c2),
adam@1576	4868 ("Hnormed 1", p_con env c1'),
adam@1576	4869 ("Hnormed 2", p_con env c2')]
adam@1576	4870
adam@1576	4871 (*app (fn (loc, env, k, s1, s2) =>
adam@1576	4872 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1576	4873 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1576	4874 (!delayedUnifs);*)
adam@1576	4875 end
adam@1576	4876 \| TypeClass (env, c, r, loc) =>
adam@1742	4877 let
adam@1742	4878 val c = normClassKey env c
adam@1742	4879 in
adam@1742	4880 case resolveClass env c of
adam@1767	4881 SOME e => r := SOME e
adam@1742	4882 \| NONE => expError env (Unresolvable (loc, c))
adam@1742	4883 end)
adam@1576	4884 gs)
adamc@753	4885 end
adamc@753	4886 in
adamc@753	4887 solver gs
adamc@753	4888 end;
adamc@753	4889
adamc@713	4890 mayDelay := false;
adamc@713	4891
adam@1723	4892 if stopHere () then
adamc@777	4893 ()
adamc@777	4894 else
adamc@777	4895 (app (fn (loc, env, k, s1, s2) =>
adamc@777	4896 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adam@1719	4897 handle CUnify' (env', err) => (ErrorMsg.errorAt loc "Error in final record unification";
adam@1719	4898 cunifyError env' err;
adam@1719	4899 case !reducedSummaries of
adam@1719	4900 NONE => ()
adam@1719	4901 \| SOME (s1, s2) =>
adam@1719	4902 (ErrorMsg.errorAt loc "Stuck unifying these records after canceling matching pieces:";
adam@1719	4903 eprefaces' [("Have", s1),
adam@1719	4904 ("Need", s2)])))
adamc@777	4905 (!delayedUnifs);
adamc@777	4906 delayedUnifs := []);
adamc@713	4907
adam@1723	4908 if stopHere () then
adam@1346	4909 ()
adam@1346	4910 else
adam@1584	4911 if List.exists kunifsInDecl file then
adam@1584	4912 case U.File.findDecl kunifsInDecl file of
adam@1584	4913 NONE => ()
adam@1584	4914 \| SOME d => declError env'' (KunifsRemain [d])
adam@1584	4915 else
adam@1584	4916 ();
adam@1345	4917
adam@1723	4918 if stopHere () then
adam@1346	4919 ()
adam@1346	4920 else
adam@1584	4921 if List.exists cunifsInDecl file then
adam@1584	4922 case U.File.findDecl cunifsInDecl file of
adam@1584	4923 NONE => ()
adam@1584	4924 \| SOME d => declError env'' (CunifsRemain [d])
adam@1584	4925 else
adam@1584	4926 ();
adamc@750	4927
adam@1723	4928 if stopHere () then
adamc@830	4929 ()
adamc@830	4930 else
adamc@837	4931 app (fn all as (env, _, _, loc) =>
adamc@830	4932 case exhaustive all of
adamc@830	4933 NONE => ()
adamc@830	4934 \| SOME p => expError env (Inexhaustive (loc, p)))
adamc@830	4935 (!delayedExhaustives);
adamc@830	4936
adam@1723	4937 if stopHere () then
adam@1576	4938 ()
adam@1576	4939 else
adam@1576	4940 !checkConstraintErrors ();
adam@1576	4941
adamc@799	4942 (preface ("file", p_file env' file);)
adam@1531	4943
adam@1745	4944 if !dumpTypes orelse (!dumpTypesOnError andalso ErrorMsg.anyErrors ()) then
adam@1531	4945 let
adam@1531	4946 open L'
adam@1531	4947 open Print.PD
adam@1531	4948 open Print
adam@1531	4949
adam@1715	4950 fun p_con env c = ElabPrint.p_con env (ElabOps.reduceCon env c)
adam@1715	4951
adam@1531	4952 fun dumpDecl (d, env) =
adam@1531	4953 case #1 d of
adam@1531	4954 DCon (x, _, k, _) => (print (box [string x,
adam@1531	4955 space,
adam@1531	4956 string "::",
adam@1531	4957 space,
adam@1531	4958 p_kind env k,
adam@1531	4959 newline,
adam@1531	4960 newline]);
adam@1531	4961 E.declBinds env d)
adam@1531	4962 \| DVal (x, _, t, _) => (print (box [string x,
adam@1531	4963 space,
adam@1531	4964 string ":",
adam@1531	4965 space,
adam@1531	4966 p_con env t,
adam@1531	4967 newline,
adam@1531	4968 newline]);
adam@1531	4969 E.declBinds env d)
adam@1531	4970 \| DValRec vis => (app (fn (x, _, t, _) => print (box [string x,
adam@1531	4971 space,
adam@1531	4972 string ":",
adam@1531	4973 space,
adam@1531	4974 p_con env t,
adam@1531	4975 newline,
adam@1531	4976 newline])) vis;
adam@1531	4977 E.declBinds env d)
adam@1531	4978 \| DStr (x, _, _, str) => (print (box [string ("<" ^ x ^ ">"),
adam@1531	4979 newline,
adam@1531	4980 newline]);
adam@1531	4981 dumpStr (str, env);
adam@1531	4982 print (box [string ("</" ^ x ^ ">"),
adam@1531	4983 newline,
adam@1531	4984 newline]);
adam@1531	4985 E.declBinds env d)
adam@1531	4986 \| _ => E.declBinds env d
adam@1531	4987
adam@1531	4988 and dumpStr (str, env) =
adam@1531	4989 case #1 str of
adam@1531	4990 StrConst ds => ignore (foldl dumpDecl env ds)
adam@1531	4991 \| _ => ()
adam@1531	4992 in
adam@1531	4993 ignore (foldl dumpDecl env' file)
adam@1531	4994 end
adam@1531	4995 else
adam@1531	4996 ();
adam@1737	4997
adam@1737	4998 if ErrorMsg.anyErrors () then
adam@1737	4999 ModDb.revert ()
adam@1737	5000 else
adam@1737	5001 ();
adam@1912	5002
adam@1912	5003 (Print.preface("File", ElabPrint.p_file env file);)
adam@1345	5004
adamc@325	5005 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325	5006 :: ds
adamc@325	5007 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325	5008 :: ds' @ file
adamc@56	5009 end
adamc@2	5010
adamc@2	5011 end

Mercurial > urweb

annotate src/elaborate.sml @ 2272:b49d22a4eda8