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annotate src/elaborate.sml @ 1619:15e0c935c91b

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Catching integer divisions by zero
author Adam Chlipala <adam@chlipala.net>
date Sat, 03 Dec 2011 09:44:07 -0500
parents 20f898c29525
children 07eed8386f07
rev   line source
adam@1529 1 (* Copyright (c) 2008-2011, Adam Chlipala
adamc@445 2 * All rights reserved.
adamc@445 3 *
adamc@445 4 * Redistribution and use in source and binary forms, with or without
adamc@445 5 * modification, are permitted provided that the following conditions are met:
adamc@445 6 *
adamc@445 7 * - Redistributions of source code must retain the above copyright notice,
adamc@445 8 * this list of conditions and the following disclaimer.
adamc@445 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445 10 * this list of conditions and the following disclaimer in the documentation
adamc@445 11 * and/or other materials provided with the distribution.
adamc@445 12 * - The names of contributors may not be used to endorse or promote products
adamc@445 13 * derived from this software without specific prior written permission.
adamc@445 14 *
adamc@445 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445 26 *)
adamc@403 27
adamc@403 28 structure Elaborate :> ELABORATE = struct
adamc@403 29
adamc@403 30 structure P = Prim
adamc@403 31 structure L = Source
adamc@403 32 structure L' = Elab
adamc@403 33 structure E = ElabEnv
adamc@403 34 structure U = ElabUtil
adamc@403 35 structure D = Disjoint
adamc@403 36
adamc@403 37 open Print
adamc@403 38 open ElabPrint
adamc@403 39 open ElabErr
adamc@403 40
adam@1531 41 val dumpTypes = ref false
adam@1531 42
adamc@819 43 structure IS = IntBinarySet
adamc@403 44 structure IM = IntBinaryMap
adamc@403 45
adamc@403 46 structure SK = struct
adamc@403 47 type ord_key = string
adamc@403 48 val compare = String.compare
adamc@403 49 end
adamc@403 50
adamc@403 51 structure SS = BinarySetFn(SK)
adamc@403 52 structure SM = BinaryMapFn(SK)
adamc@403 53
adamc@403 54 val basis_r = ref 0
adamc@633 55 val top_r = ref 0
adamc@403 56
adamc@403 57 fun elabExplicitness e =
adamc@403 58 case e of
adamc@403 59 L.Explicit => L'.Explicit
adamc@403 60 | L.Implicit => L'.Implicit
adamc@403 61
adamc@403 62 fun occursKind r =
adamc@403 63 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 64 | _ => false)
adamc@403 65
adamc@403 66 exception KUnify' of kunify_error
adamc@403 67
adamc@623 68 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 69 let
adamc@403 70 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403 71 in
adamc@403 72 case (k1, k2) of
adamc@403 73 (L'.KType, L'.KType) => ()
adamc@403 74 | (L'.KUnit, L'.KUnit) => ()
adamc@403 75
adamc@403 76 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623 77 (unifyKinds' env d1 d2;
adamc@623 78 unifyKinds' env r1 r2)
adamc@403 79 | (L'.KName, L'.KName) => ()
adamc@623 80 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403 81 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623 82 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403 83 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 84
adamc@623 85 | (L'.KRel n1, L'.KRel n2) =>
adamc@623 86 if n1 = n2 then
adamc@623 87 ()
adamc@623 88 else
adamc@623 89 err KIncompatible
adamc@623 90 | (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623 91 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623 92
adamc@403 93 | (L'.KError, _) => ()
adamc@403 94 | (_, L'.KError) => ()
adamc@403 95
adamc@623 96 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' env k1All k2All
adamc@623 97 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' env k1All k2All
adamc@403 98
adam@1302 99 | (L'.KTupleUnif (_, _, ref (SOME k)), _) => unifyKinds' env k k2All
adam@1302 100 | (_, L'.KTupleUnif (_, _, ref (SOME k))) => unifyKinds' env k1All k
adam@1302 101
adamc@403 102 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403 103 if r1 = r2 then
adamc@403 104 ()
adamc@403 105 else
adamc@403 106 r1 := SOME k2All
adamc@403 107
adamc@403 108 | (L'.KUnif (_, _, r), _) =>
adamc@403 109 if occursKind r k2All then
adamc@403 110 err KOccursCheckFailed
adamc@403 111 else
adamc@403 112 r := SOME k2All
adamc@403 113 | (_, L'.KUnif (_, _, r)) =>
adamc@403 114 if occursKind r k1All then
adamc@403 115 err KOccursCheckFailed
adamc@403 116 else
adamc@403 117 r := SOME k1All
adamc@403 118
adam@1302 119 | (L'.KTupleUnif (_, nks, r), L'.KTuple ks) =>
adam@1302 120 ((app (fn (n, k) => unifyKinds' env k (List.nth (ks, n-1))) nks;
adam@1302 121 r := SOME k2All)
adam@1302 122 handle Subscript => err KIncompatible)
adam@1302 123 | (L'.KTuple ks, L'.KTupleUnif (_, nks, r)) =>
adam@1302 124 ((app (fn (n, k) => unifyKinds' env (List.nth (ks, n-1)) k) nks;
adam@1302 125 r := SOME k1All)
adam@1302 126 handle Subscript => err KIncompatible)
adam@1302 127 | (L'.KTupleUnif (loc, nks1, r1), L'.KTupleUnif (_, nks2, r2)) =>
adam@1302 128 let
adam@1302 129 val nks = foldl (fn (p as (n, k1), nks) =>
adam@1302 130 case ListUtil.search (fn (n', k2) =>
adam@1302 131 if n' = n then
adam@1302 132 SOME k2
adam@1302 133 else
adam@1302 134 NONE) nks2 of
adam@1302 135 NONE => p :: nks
adam@1302 136 | SOME k2 => (unifyKinds' env k1 k2;
adam@1302 137 nks)) nks2 nks1
adam@1302 138
adam@1302 139 val k = (L'.KTupleUnif (loc, nks, ref NONE), loc)
adam@1302 140 in
adam@1302 141 r1 := SOME k;
adam@1302 142 r2 := SOME k
adam@1302 143 end
adam@1302 144
adamc@403 145 | _ => err KIncompatible
adamc@403 146 end
adamc@403 147
adamc@403 148 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403 149
adamc@623 150 fun unifyKinds env k1 k2 =
adamc@623 151 unifyKinds' env k1 k2
adamc@403 152 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403 153
adamc@403 154 fun checkKind env c k1 k2 =
adamc@623 155 unifyKinds env k1 k2
adamc@403 156 handle KUnify (k1, k2, err) =>
adamc@403 157 conError env (WrongKind (c, k1, k2, err))
adamc@403 158
adamc@403 159 val dummy = ErrorMsg.dummySpan
adamc@403 160
adamc@403 161 val ktype = (L'.KType, dummy)
adamc@403 162 val kname = (L'.KName, dummy)
adamc@403 163 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 164
adamc@403 165 val cerror = (L'.CError, dummy)
adamc@403 166 val kerror = (L'.KError, dummy)
adamc@403 167 val eerror = (L'.EError, dummy)
adamc@403 168 val sgnerror = (L'.SgnError, dummy)
adamc@403 169 val strerror = (L'.StrError, dummy)
adamc@403 170
adamc@403 171 val int = ref cerror
adamc@403 172 val float = ref cerror
adamc@403 173 val string = ref cerror
adamc@821 174 val char = ref cerror
adamc@403 175 val table = ref cerror
adamc@403 176
adamc@403 177 local
adamc@403 178 val count = ref 0
adamc@403 179 in
adamc@403 180
adamc@403 181 fun resetKunif () = count := 0
adamc@403 182
adamc@403 183 fun kunif loc =
adamc@403 184 let
adamc@403 185 val n = !count
adamc@403 186 val s = if n <= 26 then
adamc@403 187 str (chr (ord #"A" + n))
adamc@403 188 else
adamc@403 189 "U" ^ Int.toString (n - 26)
adamc@403 190 in
adamc@403 191 count := n + 1;
adamc@838 192 (L'.KUnif (loc, s, ref NONE), loc)
adamc@403 193 end
adamc@403 194
adamc@403 195 end
adamc@403 196
adamc@403 197 local
adamc@403 198 val count = ref 0
adamc@403 199 in
adamc@403 200
adamc@403 201 fun resetCunif () = count := 0
adamc@403 202
adamc@403 203 fun cunif (loc, k) =
adamc@403 204 let
adamc@403 205 val n = !count
adamc@712 206 val s = if n < 26 then
adamc@403 207 str (chr (ord #"A" + n))
adamc@403 208 else
adamc@403 209 "U" ^ Int.toString (n - 26)
adamc@403 210 in
adamc@403 211 count := n + 1;
adam@1303 212 (L'.CUnif (0, loc, k, s, ref NONE), loc)
adamc@403 213 end
adamc@403 214
adamc@403 215 end
adamc@403 216
adamc@623 217 fun elabKind env (k, loc) =
adamc@403 218 case k of
adamc@403 219 L.KType => (L'.KType, loc)
adamc@623 220 | L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403 221 | L.KName => (L'.KName, loc)
adamc@623 222 | L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403 223 | L.KUnit => (L'.KUnit, loc)
adamc@623 224 | L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adamc@403 225 | L.KWild => kunif loc
adamc@403 226
adamc@623 227 | L.KVar s => (case E.lookupK env s of
adamc@623 228 NONE =>
adamc@623 229 (kindError env (UnboundKind (loc, s));
adamc@623 230 kerror)
adamc@623 231 | SOME n => (L'.KRel n, loc))
adamc@623 232 | L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623 233
adamc@621 234 fun mapKind (dom, ran, loc)=
adamc@621 235 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621 236 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621 237 (L'.KRecord ran, loc)), loc)), loc)
adamc@403 238
adamc@403 239 fun hnormKind (kAll as (k, _)) =
adamc@403 240 case k of
adamc@403 241 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403 242 | _ => kAll
adamc@403 243
adamc@623 244 open ElabOps
adamc@623 245
adamc@623 246 fun elabConHead (c as (_, loc)) k =
adamc@623 247 let
adamc@623 248 fun unravel (k, c) =
adamc@623 249 case hnormKind k of
adamc@623 250 (L'.KFun (x, k'), _) =>
adamc@623 251 let
adamc@623 252 val u = kunif loc
adamc@623 253
adamc@623 254 val k'' = subKindInKind (0, u) k'
adamc@623 255 in
adamc@623 256 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623 257 end
adamc@623 258 | _ => (c, k)
adamc@623 259 in
adamc@623 260 unravel (k, c)
adamc@623 261 end
adamc@623 262
adamc@403 263 fun elabCon (env, denv) (c, loc) =
adamc@403 264 case c of
adamc@403 265 L.CAnnot (c, k) =>
adamc@403 266 let
adamc@623 267 val k' = elabKind env k
adamc@403 268 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 269 in
adamc@403 270 checkKind env c' ck k';
adamc@403 271 (c', k', gs)
adamc@403 272 end
adamc@403 273
adamc@403 274 | L.TFun (t1, t2) =>
adamc@403 275 let
adamc@403 276 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 277 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 278 in
adamc@403 279 checkKind env t1' k1 ktype;
adamc@403 280 checkKind env t2' k2 ktype;
adamc@403 281 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 282 end
adamc@403 283 | L.TCFun (e, x, k, t) =>
adamc@403 284 let
adamc@403 285 val e' = elabExplicitness e
adamc@623 286 val k' = elabKind env k
adamc@403 287 val env' = E.pushCRel env x k'
adamc@403 288 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 289 in
adamc@403 290 checkKind env t' tk ktype;
adamc@403 291 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 292 end
adamc@623 293 | L.TKFun (x, t) =>
adamc@623 294 let
adamc@623 295 val env' = E.pushKRel env x
adamc@623 296 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 297 in
adamc@623 298 checkKind env t' tk ktype;
adamc@623 299 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623 300 end
adamc@628 301 | L.TDisjoint (c1, c2, c) =>
adamc@403 302 let
adamc@403 303 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 304 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 305
adamc@403 306 val ku1 = kunif loc
adamc@403 307 val ku2 = kunif loc
adamc@403 308
adamc@628 309 val denv' = D.assert env denv (c1', c2')
adamc@403 310 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 311 in
adamc@403 312 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 313 checkKind env c2' k2 (L'.KRecord ku2, loc);
adam@1351 314 checkKind env c' k (L'.KType, loc);
adamc@403 315
adamc@628 316 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403 317 end
adamc@403 318 | L.TRecord c =>
adamc@403 319 let
adamc@403 320 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 321 val k = (L'.KRecord ktype, loc)
adamc@403 322 in
adamc@403 323 checkKind env c' ck k;
adamc@403 324 ((L'.TRecord c', loc), ktype, gs)
adamc@403 325 end
adamc@403 326
adamc@403 327 | L.CVar ([], s) =>
adamc@403 328 (case E.lookupC env s of
adamc@403 329 E.NotBound =>
adamc@403 330 (conError env (UnboundCon (loc, s));
adamc@403 331 (cerror, kerror, []))
adamc@403 332 | E.Rel (n, k) =>
adamc@623 333 let
adamc@623 334 val (c, k) = elabConHead (L'.CRel n, loc) k
adamc@623 335 in
adamc@623 336 (c, k, [])
adamc@623 337 end
adamc@403 338 | E.Named (n, k) =>
adamc@623 339 let
adamc@623 340 val (c, k) = elabConHead (L'.CNamed n, loc) k
adamc@623 341 in
adamc@623 342 (c, k, [])
adamc@623 343 end)
adamc@403 344 | L.CVar (m1 :: ms, s) =>
adamc@403 345 (case E.lookupStr env m1 of
adamc@403 346 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 347 (cerror, kerror, []))
adamc@403 348 | SOME (n, sgn) =>
adamc@403 349 let
adamc@403 350 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 351 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 352 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 353 (strerror, sgnerror))
adamc@403 354 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 355 ((L'.StrVar n, loc), sgn) ms
adamc@403 356
adamc@403 357 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403 358 NONE => (conError env (UnboundCon (loc, s));
adamc@403 359 kerror)
adamc@403 360 | SOME (k, _) => k
adamc@987 361 val (c, k) = elabConHead (L'.CModProj (n, ms, s), loc) k
adamc@403 362 in
adamc@987 363 (c, k, [])
adamc@403 364 end)
adamc@403 365
adamc@403 366 | L.CApp (c1, c2) =>
adamc@403 367 let
adamc@403 368 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 369 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 370 val dom = kunif loc
adamc@403 371 val ran = kunif loc
adamc@403 372 in
adamc@403 373 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 374 checkKind env c2' k2 dom;
adamc@403 375 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 376 end
adamc@403 377 | L.CAbs (x, ko, t) =>
adamc@403 378 let
adamc@403 379 val k' = case ko of
adamc@403 380 NONE => kunif loc
adamc@623 381 | SOME k => elabKind env k
adamc@403 382 val env' = E.pushCRel env x k'
adamc@403 383 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 384 in
adamc@403 385 ((L'.CAbs (x, k', t'), loc),
adamc@403 386 (L'.KArrow (k', tk), loc),
adamc@403 387 gs)
adamc@403 388 end
adamc@623 389 | L.CKAbs (x, t) =>
adamc@623 390 let
adamc@623 391 val env' = E.pushKRel env x
adamc@623 392 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 393 in
adamc@623 394 ((L'.CKAbs (x, t'), loc),
adamc@623 395 (L'.KFun (x, tk), loc),
adamc@623 396 gs)
adamc@623 397 end
adamc@403 398
adamc@403 399 | L.CName s =>
adamc@403 400 ((L'.CName s, loc), kname, [])
adamc@403 401
adamc@403 402 | L.CRecord xcs =>
adamc@403 403 let
adamc@403 404 val k = kunif loc
adamc@403 405
adamc@403 406 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 407 let
adamc@403 408 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 409 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 410 in
adamc@403 411 checkKind env x' xk kname;
adamc@403 412 checkKind env c' ck k;
adamc@403 413 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 414 end) [] xcs
adamc@403 415
adamc@403 416 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 417 (* Add duplicate field checking later. *)
adamc@403 418
adamc@403 419 fun prove (xcs, ds) =
adamc@403 420 case xcs of
adamc@403 421 [] => ds
adamc@403 422 | xc :: rest =>
adamc@403 423 let
adamc@403 424 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 425 val ds = foldl (fn (xc', ds) =>
adamc@403 426 let
adamc@403 427 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 428 in
adamc@403 429 D.prove env denv (r1, r2, loc) @ ds
adamc@403 430 end)
adamc@403 431 ds rest
adamc@403 432 in
adamc@403 433 prove (rest, ds)
adamc@403 434 end
adamc@403 435 in
adamc@403 436 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 437 end
adamc@403 438 | L.CConcat (c1, c2) =>
adamc@403 439 let
adamc@403 440 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 441 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 442 val ku = kunif loc
adamc@403 443 val k = (L'.KRecord ku, loc)
adamc@403 444 in
adamc@403 445 checkKind env c1' k1 k;
adamc@403 446 checkKind env c2' k2 k;
adamc@403 447 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 448 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 449 end
adamc@621 450 | L.CMap =>
adamc@403 451 let
adamc@403 452 val dom = kunif loc
adamc@403 453 val ran = kunif loc
adamc@403 454 in
adamc@621 455 ((L'.CMap (dom, ran), loc),
adamc@621 456 mapKind (dom, ran, loc),
adamc@403 457 [])
adamc@403 458 end
adamc@403 459
adamc@403 460 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 461
adamc@403 462 | L.CTuple cs =>
adamc@403 463 let
adamc@403 464 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 465 let
adamc@403 466 val (c', k, gs') = elabCon (env, denv) c
adamc@403 467 in
adamc@403 468 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 469 end) ([], [], []) cs
adamc@403 470 in
adamc@403 471 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 472 end
adamc@403 473 | L.CProj (c, n) =>
adamc@403 474 let
adamc@403 475 val (c', k, gs) = elabCon (env, denv) c
adam@1302 476
adam@1302 477 val k' = kunif loc
adamc@403 478 in
adam@1302 479 if n <= 0 then
adam@1302 480 (conError env (ProjBounds (c', n));
adam@1302 481 (cerror, kerror, []))
adam@1302 482 else
adam@1302 483 (checkKind env c' k (L'.KTupleUnif (loc, [(n, k')], ref NONE), loc);
adam@1302 484 ((L'.CProj (c', n), loc), k', gs))
adamc@403 485 end
adamc@403 486
adamc@403 487 | L.CWild k =>
adamc@403 488 let
adamc@623 489 val k' = elabKind env k
adamc@403 490 in
adamc@403 491 (cunif (loc, k'), k', [])
adamc@403 492 end
adamc@403 493
adamc@403 494 fun kunifsRemain k =
adamc@403 495 case k of
adamc@403 496 L'.KUnif (_, _, ref NONE) => true
adam@1302 497 | L'.KTupleUnif (_, _, ref NONE) => true
adamc@403 498 | _ => false
adamc@403 499 fun cunifsRemain c =
adamc@403 500 case c of
adam@1326 501 L'.CUnif (_, loc, k, _, r as ref NONE) =>
adam@1326 502 (case #1 (hnormKind k) of
adam@1584 503 L'.KUnit => (r := SOME (L'.CUnit, loc); false)
adam@1584 504 | _ => true)
adam@1584 505 | _ => false
adamc@403 506
adamc@403 507 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 508 con = fn _ => false,
adamc@403 509 exp = fn _ => false,
adamc@403 510 sgn_item = fn _ => false,
adamc@403 511 sgn = fn _ => false,
adamc@403 512 str = fn _ => false,
adamc@403 513 decl = fn _ => false}
adamc@403 514
adam@1584 515 val cunifsInDecl = U.Decl.exists {kind = fn _ => false,
adamc@403 516 con = cunifsRemain,
adam@1584 517 exp = fn _ => false,
adam@1584 518 sgn_item = fn _ => false,
adam@1584 519 sgn = fn _ => false,
adam@1584 520 str = fn _ => false,
adam@1584 521 decl = fn _ => false}
adamc@403 522
adamc@403 523 fun occursCon r =
adamc@403 524 U.Con.exists {kind = fn _ => false,
adam@1303 525 con = fn L'.CUnif (_, _, _, _, r') => r = r'
adamc@403 526 | _ => false}
adamc@403 527
adamc@403 528 exception CUnify' of cunify_error
adamc@403 529
adamc@403 530 type record_summary = {
adamc@403 531 fields : (L'.con * L'.con) list,
adamc@403 532 unifs : (L'.con * L'.con option ref) list,
adamc@403 533 others : L'.con list
adamc@403 534 }
adamc@403 535
adamc@403 536 fun summaryToCon {fields, unifs, others} =
adamc@403 537 let
adamc@403 538 val c = (L'.CRecord (ktype, []), dummy)
adamc@403 539 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403 540 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403 541 in
adamc@403 542 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403 543 end
adamc@403 544
adamc@403 545 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 546
adamc@403 547 exception CUnify of L'.con * L'.con * cunify_error
adamc@403 548
adamc@403 549 fun kindof env (c, loc) =
adamc@403 550 case c of
adamc@403 551 L'.TFun _ => ktype
adamc@403 552 | L'.TCFun _ => ktype
adamc@403 553 | L'.TRecord _ => ktype
adamc@628 554 | L'.TDisjoint _ => ktype
adamc@403 555
adamc@403 556 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 557 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 558 | L'.CModProj (n, ms, x) =>
adamc@403 559 let
adamc@403 560 val (_, sgn) = E.lookupStrNamed env n
adamc@403 561 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 562 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 563 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 564 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 565 ((L'.StrVar n, loc), sgn) ms
adamc@403 566 in
adamc@403 567 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 568 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 569 | SOME (k, _) => k
adamc@403 570 end
adamc@403 571
adamc@403 572 | L'.CApp (c, _) =>
adamc@403 573 (case hnormKind (kindof env c) of
adamc@403 574 (L'.KArrow (_, k), _) => k
adamc@403 575 | (L'.KError, _) => kerror
adamc@413 576 | k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403 577 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628 578
adamc@403 579
adamc@403 580 | L'.CName _ => kname
adamc@403 581
adamc@403 582 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 583 | L'.CConcat (c, _) => kindof env c
adamc@621 584 | L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403 585
adamc@403 586 | L'.CUnit => (L'.KUnit, loc)
adamc@403 587
adamc@403 588 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 589 | L'.CProj (c, n) =>
adamc@403 590 (case hnormKind (kindof env c) of
adamc@403 591 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adam@1311 592 | (L'.KUnif (_, _, r), _) =>
adam@1311 593 let
adam@1311 594 val ku = kunif loc
adam@1311 595 val k = (L'.KTupleUnif (loc, [(n, ku)], ref NONE), loc)
adam@1311 596 in
adam@1311 597 r := SOME k;
adam@1311 598 k
adam@1311 599 end
adam@1311 600 | (L'.KTupleUnif (_, nks, r), _) =>
adam@1311 601 (case ListUtil.search (fn (n', k) => if n' = n then SOME k else NONE) nks of
adam@1311 602 SOME k => k
adam@1311 603 | NONE =>
adam@1311 604 let
adam@1311 605 val ku = kunif loc
adam@1311 606 val k = (L'.KTupleUnif (loc, ((n, ku) :: nks), ref NONE), loc)
adam@1311 607 in
adam@1311 608 r := SOME k;
adam@1311 609 k
adam@1311 610 end)
adamc@413 611 | k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403 612
adamc@403 613 | L'.CError => kerror
adam@1303 614 | L'.CUnif (_, _, k, _, _) => k
adamc@403 615
adamc@623 616 | L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623 617 | L'.CKApp (c, k) =>
adamc@623 618 (case hnormKind (kindof env c) of
adamc@623 619 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623 620 | k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623 621 | L'.TKFun _ => ktype
adamc@403 622
adamc@621 623 exception GuessFailure
adamc@403 624
adamc@513 625 fun isUnitCon env (c, loc) =
adamc@513 626 case c of
adamc@513 627 L'.TFun _ => false
adamc@513 628 | L'.TCFun _ => false
adamc@513 629 | L'.TRecord _ => false
adamc@628 630 | L'.TDisjoint _ => false
adamc@513 631
adam@1316 632 | L'.CRel xn => #1 (hnormKind (#2 (E.lookupCRel env xn))) = L'.KUnit
adam@1316 633 | L'.CNamed xn => #1 (hnormKind (#2 (E.lookupCNamed env xn))) = L'.KUnit
adamc@518 634 | L'.CModProj (n, ms, x) => false
adamc@518 635 (*let
adamc@513 636 val (_, sgn) = E.lookupStrNamed env n
adamc@513 637 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513 638 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513 639 NONE => raise Fail "kindof: Unknown substructure"
adamc@513 640 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513 641 ((L'.StrVar n, loc), sgn) ms
adamc@513 642 in
adamc@513 643 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513 644 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513 645 | SOME ((k, _), _) => k = L'.KUnit
adamc@518 646 end*)
adamc@518 647
adamc@518 648 | L'.CApp (c, _) => false
adamc@518 649 (*(case hnormKind (kindof env c) of
adamc@513 650 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513 651 | (L'.KError, _) => false
adamc@518 652 | k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513 653 | L'.CAbs _ => false
adamc@513 654
adamc@513 655 | L'.CName _ => false
adamc@513 656
adamc@513 657 | L'.CRecord _ => false
adamc@513 658 | L'.CConcat _ => false
adamc@621 659 | L'.CMap _ => false
adamc@513 660
adamc@513 661 | L'.CUnit => true
adamc@513 662
adamc@513 663 | L'.CTuple _ => false
adamc@518 664 | L'.CProj (c, n) => false
adamc@518 665 (*(case hnormKind (kindof env c) of
adamc@513 666 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518 667 | k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513 668
adamc@513 669 | L'.CError => false
adam@1316 670 | L'.CUnif (_, _, k, _, _) => #1 (hnormKind k) = L'.KUnit
adamc@513 671
adamc@623 672 | L'.CKAbs _ => false
adamc@623 673 | L'.CKApp _ => false
adamc@623 674 | L'.TKFun _ => false
adamc@623 675
adamc@709 676 val recdCounter = ref 0
adamc@709 677
adamc@713 678 val mayDelay = ref false
adamc@777 679 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777 680
adamc@830 681 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830 682
adam@1304 683 exception CantSquish
adam@1304 684
adam@1304 685 fun squish by =
adam@1304 686 U.Con.mapB {kind = fn _ => fn k => k,
adam@1304 687 con = fn bound => fn c =>
adam@1304 688 case c of
adam@1304 689 L'.CRel xn =>
adam@1304 690 if xn < bound then
adam@1304 691 c
adam@1304 692 else if bound <= xn andalso xn < bound + by then
adam@1304 693 raise CantSquish
adam@1304 694 else
adam@1304 695 L'.CRel (xn - by)
adam@1304 696 | L'.CUnif _ => raise CantSquish
adam@1304 697 | _ => c,
adam@1304 698 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1304 699 | (bound, _) => bound} 0
adam@1304 700
adam@1582 701 val reducedSummaries = ref (NONE : (Print.PD.pp_desc * Print.PD.pp_desc) option)
adam@1582 702
adamc@777 703 fun unifyRecordCons env (loc, c1, c2) =
adamc@403 704 let
adamc@403 705 fun rkindof c =
adamc@403 706 case hnormKind (kindof env c) of
adamc@403 707 (L'.KRecord k, _) => k
adamc@403 708 | (L'.KError, _) => kerror
adamc@753 709 | (L'.KUnif (_, _, r), _) =>
adamc@753 710 let
adamc@753 711 val k = kunif (#2 c)
adamc@753 712 in
adamc@753 713 r := SOME (L'.KRecord k, #2 c);
adamc@753 714 k
adamc@753 715 end
adamc@413 716 | k => raise CUnify' (CKindof (k, c, "record"))
adamc@403 717
adamc@403 718 val k1 = rkindof c1
adamc@403 719 val k2 = rkindof c2
adamc@403 720
adamc@628 721 val r1 = recordSummary env c1
adamc@628 722 val r2 = recordSummary env c2
adamc@403 723 in
adamc@623 724 unifyKinds env k1 k2;
adamc@777 725 unifySummaries env (loc, k1, r1, r2)
adamc@403 726 end
adamc@403 727
adamc@777 728 and normalizeRecordSummary env (r : record_summary) =
adamc@777 729 recordSummary env (summaryToCon r)
adamc@777 730
adamc@628 731 and recordSummary env c =
adamc@403 732 let
adamc@628 733 val c = hnormCon env c
adamc@628 734
adamc@628 735 val sum =
adamc@403 736 case c of
adamc@628 737 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403 738 | (L'.CConcat (c1, c2), _) =>
adamc@403 739 let
adamc@628 740 val s1 = recordSummary env c1
adamc@628 741 val s2 = recordSummary env c2
adamc@403 742 in
adamc@628 743 {fields = #fields s1 @ #fields s2,
adamc@628 744 unifs = #unifs s1 @ #unifs s2,
adamc@628 745 others = #others s1 @ #others s2}
adamc@403 746 end
adam@1303 747 | (L'.CUnif (nl, _, _, _, ref (SOME c)), _) => recordSummary env (E.mliftConInCon nl c)
adam@1303 748 | c' as (L'.CUnif (0, _, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628 749 | c' => {fields = [], unifs = [], others = [c']}
adamc@403 750 in
adamc@628 751 sum
adamc@403 752 end
adamc@403 753
adamc@987 754 and consEq env loc (c1, c2) =
adamc@777 755 let
adamc@777 756 val mayDelay' = !mayDelay
adamc@777 757 in
adamc@777 758 (mayDelay := false;
adamc@987 759 unifyCons env loc c1 c2;
adamc@777 760 mayDelay := mayDelay';
adamc@777 761 true)
adamc@777 762 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777 763 end
adamc@403 764
adamc@403 765 and consNeq env (c1, c2) =
adamc@628 766 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403 767 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093 768 | (L'.CName _, L'.CRel _) => true
adamc@1093 769 | (L'.CRel _, L'.CName _) => true
adamc@1093 770 | (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093 771 | (L'.CRel _, L'.CNamed _) => true
adamc@1093 772 | (L'.CNamed _, L'.CRel _) => true
adamc@1093 773 | (L'.CRel _, L'.CModProj _) => true
adamc@1093 774 | (L'.CModProj _, L'.CRel _) => true
adamc@1269 775 | (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adam@1589 776 | (L'.CModProj _, L'.CName _) => true
adam@1589 777 | (L'.CName _, L'.CModProj _) => true
adam@1589 778 | (L'.CNamed _, L'.CName _) => true
adam@1589 779 | (L'.CName _, L'.CNamed _) => true
adamc@403 780 | _ => false
adamc@403 781
adamc@777 782 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403 783 let
adam@1583 784 val () = reducedSummaries := NONE
adam@1583 785
adamc@848 786 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1303 787 ("#1", p_summary env s1),
adam@1303 788 ("#2", p_summary env s2)]*)
adamc@403 789
adamc@403 790 fun eatMatching p (ls1, ls2) =
adamc@403 791 let
adamc@403 792 fun em (ls1, ls2, passed1) =
adamc@403 793 case ls1 of
adamc@403 794 [] => (rev passed1, ls2)
adamc@403 795 | h1 :: t1 =>
adamc@403 796 let
adamc@403 797 fun search (ls2', passed2) =
adamc@403 798 case ls2' of
adamc@403 799 [] => em (t1, ls2, h1 :: passed1)
adamc@403 800 | h2 :: t2 =>
adamc@403 801 if p (h1, h2) then
adamc@403 802 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 803 else
adamc@403 804 search (t2, h2 :: passed2)
adamc@403 805 in
adamc@403 806 search (ls2, [])
adamc@403 807 end
adamc@403 808 in
adamc@403 809 em (ls1, ls2, [])
adamc@403 810 end
adamc@403 811
adamc@403 812 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 813 not (consNeq env (x1, x2))
adamc@987 814 andalso consEq env loc (c1, c2)
adamc@987 815 andalso consEq env loc (x1, x2))
adamc@403 816 (#fields s1, #fields s2)
adamc@403 817 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 818 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 819
adamc@403 820 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 821
adamc@987 822 val (others1, others2) = eatMatching (consEq env loc) (#others s1, #others s2)
adamc@403 823 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 824 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 825
adamc@709 826 fun unsummarize {fields, unifs, others} =
adamc@709 827 let
adamc@709 828 val c = (L'.CRecord (k, fields), loc)
adamc@709 829
adamc@709 830 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709 831 c unifs
adamc@709 832 in
adamc@709 833 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709 834 c others
adamc@709 835 end
adamc@709 836
adamc@710 837 val empties = ([], [], [], [], [], [])
adamc@710 838
adamc@709 839 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709 840 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@709 841 orig as ([(_, r)], [], [], _, _, _) =>
adamc@709 842 let
adamc@709 843 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709 844 in
adamc@709 845 if occursCon r c then
adamc@709 846 orig
adamc@709 847 else
adamc@709 848 (r := SOME c;
adamc@710 849 empties)
adamc@709 850 end
adamc@709 851 | orig as (_, _, _, [(_, r)], [], []) =>
adamc@709 852 let
adamc@709 853 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709 854 in
adamc@709 855 if occursCon r c then
adamc@709 856 orig
adamc@709 857 else
adamc@709 858 (r := SOME c;
adamc@710 859 empties)
adamc@709 860 end
adamc@710 861 | orig as ([(_, r1 as ref NONE)], _, [], [(_, r2 as ref NONE)], _, []) =>
adamc@710 862 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710 863 let
adamc@838 864 val kr = (L'.KRecord k, loc)
adamc@710 865 val u = cunif (loc, kr)
adamc@710 866 in
adamc@710 867 r1 := SOME (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc);
adamc@710 868 r2 := SOME (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc);
adamc@710 869 empties
adamc@710 870 end
adamc@710 871 else
adamc@710 872 orig
adamc@709 873 | orig => orig
adamc@709 874
adamc@403 875 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777 876 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 877
adamc@753 878 fun isGuessable (other, fs, unifs) =
adamc@753 879 let
adamc@753 880 val c = (L'.CRecord (k, fs), loc)
adamc@753 881 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753 882 in
adamc@987 883 (guessMap env loc (other, c, GuessFailure);
adamc@753 884 true)
adamc@753 885 handle GuessFailure => false
adamc@753 886 end
adamc@403 887
adamc@754 888 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753 889 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753 890 ([], _, [other1], [], [], _) =>
adamc@753 891 if isGuessable (other1, fs2, unifs2) then
adamc@754 892 ([], [], [], [], [], [])
adamc@403 893 else
adamc@754 894 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753 895 | (_, [], [], [other2], _, []) =>
adamc@777 896 if isGuessable (other2, fs1, unifs1) then
adamc@777 897 ([], [], [], [], [], [])
adamc@777 898 else
adamc@777 899 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754 900 | _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403 901
adam@1582 902 val () = if !mayDelay then
adam@1582 903 ()
adam@1582 904 else
adam@1582 905 reducedSummaries := SOME (p_summary env {fields = fs1, unifs = unifs1, others = others1},
adam@1582 906 p_summary env {fields = fs2, unifs = unifs2, others = others2})
adam@1582 907
adamc@403 908 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 909 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 910
adamc@838 911 val empty = (L'.CRecord (k, []), loc)
adamc@1071 912 fun failure () =
adamc@1071 913 let
adamc@1071 914 val fs2 = #fields s2
adamc@1071 915
adamc@1071 916 fun findPointwise fs1 =
adamc@1071 917 case fs1 of
adamc@1071 918 [] => NONE
adamc@1071 919 | (nm1, c1) :: fs1 =>
adamc@1071 920 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071 921 NONE => findPointwise fs1
adamc@1071 922 | SOME (_, c2) =>
adamc@1071 923 if consEq env loc (c1, c2) then
adamc@1071 924 findPointwise fs1
adamc@1071 925 else
adam@1588 926 SOME (nm1, c1, c2, (unifyCons env loc c1 c2; NONE)
adam@1588 927 handle CUnify (_, _, err) => (reducedSummaries := NONE;
adam@1588 928 SOME err))
adamc@1071 929 in
adamc@1071 930 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071 931 end
adam@1341 932
adam@1341 933 fun default () = if !mayDelay then
adam@1341 934 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adam@1341 935 else
adam@1341 936 failure ()
adamc@709 937 in
adamc@777 938 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777 939 (_, [], [], [], [], []) =>
adamc@777 940 app (fn (_, r) => r := SOME empty) unifs1
adamc@777 941 | ([], [], [], _, [], []) =>
adamc@777 942 app (fn (_, r) => r := SOME empty) unifs2
adam@1341 943 | (_, _, _, [], [], [cr as (L'.CUnif (nl, _, _, _, r), _)]) =>
adam@1341 944 let
adam@1341 945 val c = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1341 946 in
adam@1341 947 if occursCon r c then
adam@1588 948 (reducedSummaries := NONE;
adam@1588 949 raise CUnify' (COccursCheckFailed (cr, c)))
adam@1341 950 else
adam@1341 951 (r := SOME (squish nl c))
adam@1341 952 handle CantSquish => default ()
adam@1341 953 end
adam@1341 954 | ([], [], [cr as (L'.CUnif (nl, _, _, _, r), _)], _, _, _) =>
adam@1341 955 let
adam@1341 956 val c = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1341 957 in
adam@1341 958 if occursCon r c then
adam@1588 959 (reducedSummaries := NONE;
adam@1588 960 raise CUnify' (COccursCheckFailed (cr, c)))
adam@1341 961 else
adam@1341 962 (r := SOME (squish nl c))
adam@1341 963 handle CantSquish => default ()
adam@1341 964 end
adam@1341 965 | _ => default ())
adam@1341 966
adamc@777 967 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777 968 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403 969 end
adamc@403 970
adamc@987 971 and guessMap env loc (c1, c2, ex) =
adamc@403 972 let
adamc@621 973 fun unfold (dom, ran, f, r, c) =
adamc@403 974 let
adamc@621 975 fun unfold (r, c) =
adamc@754 976 case #1 (hnormCon env c) of
adamc@987 977 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628 978 | L'.CRecord (_, [(x, v)]) =>
adamc@628 979 let
adamc@628 980 val v' = case dom of
adamc@628 981 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628 982 | _ => cunif (loc, dom)
adamc@628 983 in
adamc@987 984 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987 985 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 986 end
adamc@628 987 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 988 let
adamc@628 989 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 990 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 991 in
adamc@628 992 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 993 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987 994 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 995 end
adamc@628 996 | L'.CConcat (c1', c2') =>
adamc@628 997 let
adamc@628 998 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 999 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 1000 in
adamc@628 1001 unfold (r1, c1');
adamc@628 1002 unfold (r2, c2');
adamc@987 1003 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 1004 end
adam@1303 1005 | L'.CUnif (0, _, _, _, ur) =>
adamc@777 1006 ur := SOME (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adamc@628 1007 | _ => raise ex
adamc@403 1008 in
adamc@621 1009 unfold (r, c)
adamc@403 1010 end
adamc@632 1011 handle _ => raise ex
adamc@403 1012 in
adamc@403 1013 case (#1 c1, #1 c2) of
adamc@621 1014 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 1015 unfold (dom, ran, f, r, c2)
adamc@621 1016 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 1017 unfold (dom, ran, f, r, c1)
adamc@403 1018 | _ => raise ex
adamc@403 1019 end
adamc@403 1020
adamc@987 1021 and unifyCons' env loc c1 c2 =
adamc@628 1022 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 1023 ()
adamc@628 1024 else
adamc@403 1025 let
adamc@628 1026 (*val befor = Time.now ()
adamc@628 1027 val old1 = c1
adamc@628 1028 val old2 = c2*)
adamc@628 1029 val c1 = hnormCon env c1
adamc@628 1030 val c2 = hnormCon env c2
adamc@403 1031 in
adamc@987 1032 unifyCons'' env loc c1 c2
adamc@987 1033 handle ex => guessMap env loc (c1, c2, ex)
adamc@403 1034 end
adamc@628 1035
adamc@987 1036 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403 1037 let
adamc@403 1038 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 1039
adamc@706 1040 fun projSpecial1 (c1, n1, onFail) =
adamc@403 1041 let
adamc@632 1042 fun trySnd () =
adamc@632 1043 case #1 (hnormCon env c2All) of
adamc@632 1044 L'.CProj (c2, n2) =>
adamc@632 1045 let
adamc@632 1046 fun tryNormal () =
adamc@632 1047 if n1 = n2 then
adamc@987 1048 unifyCons' env loc c1 c2
adamc@632 1049 else
adamc@706 1050 onFail ()
adamc@632 1051 in
adamc@632 1052 case #1 (hnormCon env c2) of
adam@1303 1053 L'.CUnif (0, _, k, _, r) =>
adamc@632 1054 (case #1 (hnormKind k) of
adamc@632 1055 L'.KTuple ks =>
adamc@632 1056 let
adamc@632 1057 val loc = #2 c2
adamc@632 1058 val us = map (fn k => cunif (loc, k)) ks
adamc@632 1059 in
adamc@632 1060 r := SOME (L'.CTuple us, loc);
adamc@987 1061 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632 1062 end
adamc@632 1063 | _ => tryNormal ())
adamc@632 1064 | _ => tryNormal ()
adamc@632 1065 end
adamc@706 1066 | _ => onFail ()
adamc@403 1067 in
adamc@632 1068 case #1 (hnormCon env c1) of
adam@1303 1069 L'.CUnif (0, _, k, _, r) =>
adamc@632 1070 (case #1 (hnormKind k) of
adamc@632 1071 L'.KTuple ks =>
adamc@632 1072 let
adamc@632 1073 val loc = #2 c1
adamc@632 1074 val us = map (fn k => cunif (loc, k)) ks
adamc@632 1075 in
adamc@632 1076 r := SOME (L'.CTuple us, loc);
adamc@987 1077 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632 1078 end
adamc@632 1079 | _ => trySnd ())
adamc@632 1080 | _ => trySnd ()
adamc@403 1081 end
adamc@632 1082
adamc@706 1083 fun projSpecial2 (c2, n2, onFail) =
adamc@706 1084 case #1 (hnormCon env c2) of
adam@1303 1085 L'.CUnif (0, _, k, _, r) =>
adamc@706 1086 (case #1 (hnormKind k) of
adamc@706 1087 L'.KTuple ks =>
adamc@706 1088 let
adamc@706 1089 val loc = #2 c2
adamc@706 1090 val us = map (fn k => cunif (loc, k)) ks
adamc@706 1091 in
adamc@706 1092 r := SOME (L'.CTuple us, loc);
adamc@987 1093 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706 1094 end
adamc@706 1095 | _ => onFail ())
adamc@706 1096 | _ => onFail ()
adamc@706 1097
adamc@777 1098 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706 1099
adamc@706 1100 fun isRecord () =
adamc@706 1101 case (c1, c2) of
adamc@706 1102 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706 1103 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706 1104 | _ => isRecord' ()
adamc@706 1105 in
adamc@706 1106 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@706 1107 ("c2All", p_con env c2All)];*)
adamc@706 1108
adamc@706 1109 case (c1, c2) of
adamc@706 1110 (L'.CError, _) => ()
adamc@706 1111 | (_, L'.CError) => ()
adamc@403 1112
adam@1303 1113 | (L'.CUnif (nl1, loc1, k1, _, r1), L'.CUnif (nl2, loc2, k2, _, r2)) =>
adam@1303 1114 if r1 = r2 andalso nl1 = nl2 then
adamc@705 1115 ()
adam@1303 1116 else if nl1 = 0 then
adamc@705 1117 (unifyKinds env k1 k2;
adamc@705 1118 r1 := SOME c2All)
adam@1303 1119 else if nl2 = 0 then
adam@1303 1120 (unifyKinds env k1 k2;
adam@1305 1121 r2 := SOME c1All)
adam@1303 1122 else
adam@1303 1123 err (fn _ => TooLifty (loc1, loc2))
adam@1303 1124
adam@1303 1125 | (L'.CUnif (0, _, _, _, r), _) =>
adamc@705 1126 if occursCon r c2All then
adamc@705 1127 err COccursCheckFailed
adamc@705 1128 else
adamc@705 1129 r := SOME c2All
adam@1303 1130 | (_, L'.CUnif (0, _, _, _, r)) =>
adamc@705 1131 if occursCon r c1All then
adamc@705 1132 err COccursCheckFailed
adamc@705 1133 else
adamc@705 1134 r := SOME c1All
adamc@705 1135
adam@1304 1136 | (L'.CUnif (nl, _, _, _, r), _) =>
adam@1304 1137 if occursCon r c2All then
adam@1304 1138 err COccursCheckFailed
adam@1304 1139 else
adam@1304 1140 (r := SOME (squish nl c2All)
adam@1306 1141 handle CantSquish => err (fn _ => TooDeep))
adam@1304 1142 | (_, L'.CUnif (nl, _, _, _, r)) =>
adam@1304 1143 if occursCon r c1All then
adam@1304 1144 err COccursCheckFailed
adam@1304 1145 else
adam@1304 1146 (r := SOME (squish nl c1All)
adam@1306 1147 handle CantSquish => err (fn _ => TooDeep))
adam@1304 1148
adam@1341 1149 | (L'.CRecord _, _) => isRecord ()
adam@1341 1150 | (_, L'.CRecord _) => isRecord ()
adam@1341 1151 | (L'.CConcat _, _) => isRecord ()
adam@1341 1152 | (_, L'.CConcat _) => isRecord ()
adam@1341 1153
adam@1341 1154
adamc@705 1155 | (L'.CUnit, L'.CUnit) => ()
adamc@705 1156
adamc@705 1157 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987 1158 (unifyCons' env loc d1 d2;
adamc@987 1159 unifyCons' env loc r1 r2)
adamc@705 1160 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705 1161 if expl1 <> expl2 then
adamc@705 1162 err CExplicitness
adamc@705 1163 else
adamc@705 1164 (unifyKinds env d1 d2;
adamc@705 1165 let
adamc@705 1166 (*val befor = Time.now ()*)
adamc@705 1167 val env' = E.pushCRel env x1 d1
adamc@705 1168 in
adamc@705 1169 (*TextIO.print ("E.pushCRel: "
adamc@705 1170 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705 1171 ^ "\n");*)
adamc@987 1172 unifyCons' env' loc r1 r2
adamc@705 1173 end)
adamc@987 1174 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705 1175 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987 1176 (unifyCons' env loc c1 c2;
adamc@987 1177 unifyCons' env loc d1 d2;
adamc@987 1178 unifyCons' env loc e1 e2)
adamc@705 1179
adamc@705 1180 | (L'.CRel n1, L'.CRel n2) =>
adamc@705 1181 if n1 = n2 then
adamc@705 1182 ()
adamc@705 1183 else
adamc@705 1184 err CIncompatible
adamc@705 1185 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@705 1186 if n1 = n2 then
adamc@705 1187 ()
adamc@705 1188 else
adamc@705 1189 err CIncompatible
adamc@705 1190
adamc@705 1191 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987 1192 (unifyCons' env loc d1 d2;
adamc@987 1193 unifyCons' env loc r1 r2)
adamc@705 1194 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705 1195 (unifyKinds env k1 k2;
adamc@987 1196 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705 1197
adamc@705 1198 | (L'.CName n1, L'.CName n2) =>
adamc@705 1199 if n1 = n2 then
adamc@705 1200 ()
adamc@705 1201 else
adamc@705 1202 err CIncompatible
adamc@705 1203
adamc@705 1204 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705 1205 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705 1206 ()
adamc@705 1207 else
adamc@705 1208 err CIncompatible
adamc@705 1209
adamc@705 1210 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987 1211 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705 1212 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705 1213
adamc@706 1214 | (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706 1215 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706 1216
adamc@623 1217 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1218 (unifyKinds env dom1 dom2;
adamc@628 1219 unifyKinds env ran1 ran2)
adamc@623 1220
adamc@623 1221 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987 1222 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623 1223 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1224 (unifyKinds env k1 k2;
adamc@987 1225 unifyCons' env loc c1 c2)
adamc@623 1226 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987 1227 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628 1228
adamc@403 1229 | _ => err CIncompatible
adamc@403 1230 end
adamc@403 1231
adamc@987 1232 and unifyCons env loc c1 c2 =
adamc@987 1233 unifyCons' env loc c1 c2
adamc@403 1234 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 1235 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 1236
adamc@628 1237 fun checkCon env e c1 c2 =
adamc@987 1238 unifyCons env (#2 e) c1 c2
adamc@403 1239 handle CUnify (c1, c2, err) =>
adamc@628 1240 expError env (Unify (e, c1, c2, err))
adamc@628 1241
adamc@628 1242 fun checkPatCon env p c1 c2 =
adamc@987 1243 unifyCons env (#2 p) c1 c2
adamc@403 1244 handle CUnify (c1, c2, err) =>
adamc@628 1245 expError env (PatUnify (p, c1, c2, err))
adamc@71 1246
adamc@403 1247 fun primType env p =
adamc@403 1248 case p of
adamc@403 1249 P.Int _ => !int
adamc@403 1250 | P.Float _ => !float
adamc@403 1251 | P.String _ => !string
adamc@821 1252 | P.Char _ => !char
adamc@623 1253
adamc@403 1254 datatype constraint =
adamc@403 1255 Disjoint of D.goal
adamc@403 1256 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1257
adam@1591 1258 fun relocConstraint loc c =
adam@1591 1259 case c of
adam@1591 1260 Disjoint (_, a, b, c, d) => Disjoint (loc, a, b, c, d)
adam@1591 1261 | TypeClass (a, b, c, _) => TypeClass (a, b, c, loc)
adam@1591 1262
adamc@403 1263 val enD = map Disjoint
adamc@403 1264
adamc@634 1265 fun isClassOrFolder env cl =
adamc@634 1266 E.isClass env cl
adamc@634 1267 orelse case hnormCon env cl of
adamc@634 1268 (L'.CKApp (cl, _), _) =>
adamc@634 1269 (case hnormCon env cl of
adamc@634 1270 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1271 | _ => false)
adamc@634 1272 | _ => false
adamc@634 1273
adam@1303 1274 fun subConInCon env x y =
adam@1303 1275 ElabOps.subConInCon x y
adam@1303 1276 handle SubUnif => (cunifyError env (TooUnify (#2 x, y));
adam@1303 1277 cerror)
adam@1303 1278
adamc@629 1279 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1280 let
adamc@898 1281 fun unravelKind (t, e) =
adamc@898 1282 case hnormCon env t of
adamc@898 1283 (L'.TKFun (x, t'), _) =>
adamc@898 1284 let
adamc@898 1285 val u = kunif loc
adamc@898 1286
adamc@898 1287 val t'' = subKindInCon (0, u) t'
adamc@898 1288 in
adamc@898 1289 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898 1290 end
adamc@898 1291 | t => (e, t, [])
adamc@898 1292
adamc@403 1293 fun unravel (t, e) =
adamc@628 1294 case hnormCon env t of
adamc@628 1295 (L'.TKFun (x, t'), _) =>
adamc@628 1296 let
adamc@628 1297 val u = kunif loc
adamc@628 1298
adamc@628 1299 val t'' = subKindInCon (0, u) t'
adamc@628 1300 in
adamc@628 1301 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1302 end
adamc@628 1303 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1304 let
adamc@628 1305 val u = cunif (loc, k)
adamc@628 1306
adam@1303 1307 val t'' = subConInCon env (0, u) t'
adamc@628 1308 in
adamc@628 1309 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1310 end
adamc@633 1311 | (L'.TFun (dom, ran), _) =>
adamc@628 1312 let
adamc@633 1313 fun default () = (e, t, [])
adamc@750 1314
adamc@750 1315 fun isInstance () =
adamc@750 1316 if infer <> L.TypesOnly then
adamc@750 1317 let
adamc@750 1318 val r = ref NONE
adamc@750 1319 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750 1320 in
adamc@750 1321 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750 1322 end
adamc@750 1323 else
adamc@750 1324 default ()
adamc@750 1325
adamc@750 1326 fun hasInstance c =
adamc@753 1327 case hnormCon env c of
adamc@753 1328 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753 1329 con = fn c =>
adamc@753 1330 E.isClass env (hnormCon env (c, loc))} c
adamc@753 1331 | c =>
adamc@750 1332 let
adamc@753 1333 fun findHead c =
adamc@753 1334 case #1 c of
adamc@753 1335 L'.CApp (f, _) => findHead f
adamc@753 1336 | _ => c
adamc@753 1337
adamc@753 1338 val cl = hnormCon env (findHead c)
adamc@750 1339 in
adamc@750 1340 isClassOrFolder env cl
adamc@750 1341 end
adamc@628 1342 in
adamc@750 1343 if hasInstance dom then
adamc@750 1344 isInstance ()
adamc@750 1345 else
adamc@750 1346 default ()
adamc@628 1347 end
adamc@629 1348 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1349 if infer <> L.TypesOnly then
adamc@629 1350 let
adamc@792 1351 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629 1352 val (e, t, gs') = unravel (t', e)
adamc@629 1353 in
adamc@629 1354 (e, t, enD gs @ gs')
adamc@629 1355 end
adamc@629 1356 else
adamc@629 1357 (e, t, [])
adamc@628 1358 | t => (e, t, [])
adam@1591 1359
adam@1591 1360 val (e, t, gs) = case infer of
adam@1591 1361 L.DontInfer => unravelKind (t, e)
adam@1591 1362 | _ => unravel (t, e)
adamc@704 1363 in
adam@1591 1364 ((#1 e, loc), (#1 t, loc), map (relocConstraint loc) gs)
adamc@704 1365 end
adamc@15 1366
adamc@628 1367 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1368 let
adamc@171 1369 val perror = (L'.PWild, loc)
adamc@171 1370 val terror = (L'.CError, loc)
adamc@171 1371 val pterror = (perror, terror)
adamc@171 1372 val rerror = (pterror, (env, bound))
adamc@171 1373
adamc@191 1374 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1375 case (po, to) of
adamc@188 1376 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1377 rerror)
adamc@188 1378 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1379 rerror)
adamc@191 1380 | (NONE, NONE) =>
adamc@191 1381 let
adamc@191 1382 val k = (L'.KType, loc)
adamc@191 1383 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1384 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1385 in
adamc@191 1386 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1387 (env, bound))
adamc@191 1388 end
adamc@188 1389 | (SOME p, SOME t) =>
adamc@188 1390 let
adamc@628 1391 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1392
adamc@191 1393 val k = (L'.KType, loc)
adamc@191 1394 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1395 val nxs = length unifs - 1
adam@1304 1396 val t = ListUtil.foldli (fn (i, u, t) => subConInCon env (nxs - i,
adam@1304 1397 E.mliftConInCon (nxs - i) u) t) t unifs
adamc@191 1398 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1399 in
adamc@628 1400 ignore (checkPatCon env p' pt t);
adamc@191 1401 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1402 (env, bound))
adamc@188 1403 end
adamc@171 1404 in
adamc@171 1405 case p of
adamc@171 1406 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1407 (env, bound))
adamc@171 1408 | L.PVar x =>
adamc@171 1409 let
adamc@171 1410 val t = if SS.member (bound, x) then
adamc@171 1411 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1412 terror)
adamc@171 1413 else
adamc@171 1414 cunif (loc, (L'.KType, loc))
adamc@171 1415 in
adamc@182 1416 (((L'.PVar (x, t), loc), t),
adamc@171 1417 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1418 end
adamc@173 1419 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1420 (env, bound))
adamc@171 1421 | L.PCon ([], x, po) =>
adamc@171 1422 (case E.lookupConstructor env x of
adamc@174 1423 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1424 rerror)
adamc@191 1425 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1426 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1427 (case E.lookupStr env m1 of
adamc@174 1428 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1429 rerror)
adamc@174 1430 | SOME (n, sgn) =>
adamc@174 1431 let
adamc@174 1432 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1433 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1434 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1435 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1436 ((L'.StrVar n, loc), sgn) ms
adamc@174 1437 in
adamc@174 1438 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1439 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1440 rerror)
adamc@191 1441 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1442 end)
adamc@174 1443
adamc@175 1444 | L.PRecord (xps, flex) =>
adamc@175 1445 let
adamc@175 1446 val (xpts, (env, bound, _)) =
adamc@175 1447 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1448 let
adamc@628 1449 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1450 in
adamc@175 1451 if SS.member (fbound, x) then
adamc@175 1452 expError env (DuplicatePatField (loc, x))
adamc@175 1453 else
adamc@175 1454 ();
adamc@175 1455 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1456 end)
adamc@175 1457 (env, bound, SS.empty) xps
adamc@175 1458
adamc@175 1459 val k = (L'.KType, loc)
adamc@175 1460 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1461 val c =
adamc@175 1462 if flex then
adamc@176 1463 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1464 else
adamc@176 1465 c
adamc@175 1466 in
adamc@182 1467 (((L'.PRecord xpts, loc),
adamc@175 1468 (L'.TRecord c, loc)),
adamc@175 1469 (env, bound))
adamc@175 1470 end
adamc@822 1471
adamc@822 1472 | L.PAnnot (p, t) =>
adamc@822 1473 let
adamc@822 1474 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822 1475 val (t', k, _) = elabCon (env, D.empty) t
adamc@822 1476 in
adamc@822 1477 checkPatCon env p' pt t';
adamc@822 1478 ((p', t'), (env, bound))
adamc@822 1479 end
adamc@171 1480 end
adamc@171 1481
adamc@819 1482 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819 1483 fun exhaustive (env, t, ps, loc) =
adamc@819 1484 let
adamc@819 1485 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819 1486
adamc@819 1487 fun patConNum pc =
adamc@819 1488 case pc of
adamc@819 1489 L'.PConVar n => n
adamc@819 1490 | L'.PConProj (m1, ms, x) =>
adamc@819 1491 let
adamc@819 1492 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1493 in
adamc@819 1494 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819 1495 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1496 | SOME (_, n, _, _, _) => n
adamc@819 1497 end
adamc@819 1498
adamc@819 1499 fun nameOfNum (t, n) =
adamc@819 1500 case t of
adamc@819 1501 L'.CModProj (m1, ms, x) =>
adamc@819 1502 let
adamc@819 1503 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1504 in
adamc@819 1505 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1506 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1507 | SOME (_, cons) =>
adamc@819 1508 case ListUtil.search (fn (name, n', _) =>
adamc@819 1509 if n' = n then
adamc@819 1510 SOME name
adamc@819 1511 else
adamc@819 1512 NONE) cons of
adamc@819 1513 NONE => fail 9
adamc@819 1514 | SOME name => L'.PConProj (m1, ms, name)
adamc@819 1515 end
adamc@819 1516 | _ => L'.PConVar n
adamc@819 1517
adamc@819 1518 fun S (args, c, P) =
adamc@819 1519 List.mapPartial
adamc@819 1520 (fn [] => fail 1
adamc@819 1521 | p1 :: ps =>
adamc@819 1522 let
adamc@819 1523 val loc = #2 p1
adamc@819 1524
adamc@819 1525 fun wild () =
adamc@819 1526 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819 1527 in
adamc@819 1528 case #1 p1 of
adamc@819 1529 L'.PPrim _ => NONE
adamc@819 1530 | L'.PCon (_, c', _, NONE) =>
adamc@819 1531 if patConNum c' = c then
adamc@819 1532 SOME ps
adamc@819 1533 else
adamc@819 1534 NONE
adamc@819 1535 | L'.PCon (_, c', _, SOME p) =>
adamc@819 1536 if patConNum c' = c then
adamc@819 1537 SOME (p :: ps)
adamc@819 1538 else
adamc@819 1539 NONE
adamc@819 1540 | L'.PRecord xpts =>
adamc@819 1541 SOME (map (fn x =>
adamc@819 1542 case ListUtil.search (fn (x', p, _) =>
adamc@819 1543 if x = x' then
adamc@819 1544 SOME p
adamc@819 1545 else
adamc@819 1546 NONE) xpts of
adamc@819 1547 NONE => (L'.PWild, loc)
adamc@819 1548 | SOME p => p) args @ ps)
adamc@819 1549 | L'.PWild => wild ()
adamc@819 1550 | L'.PVar _ => wild ()
adamc@819 1551 end)
adamc@819 1552 P
adamc@819 1553
adamc@819 1554 fun D P =
adamc@819 1555 List.mapPartial
adamc@819 1556 (fn [] => fail 2
adamc@819 1557 | (p1, _) :: ps =>
adamc@819 1558 case p1 of
adamc@819 1559 L'.PWild => SOME ps
adamc@819 1560 | L'.PVar _ => SOME ps
adamc@819 1561 | L'.PPrim _ => NONE
adamc@819 1562 | L'.PCon _ => NONE
adamc@819 1563 | L'.PRecord _ => NONE)
adamc@819 1564 P
adamc@819 1565
adamc@819 1566 fun I (P, q) =
adamc@819 1567 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819 1568 ("q", p_list (p_con env) q)];*)
adamc@819 1569 case q of
adamc@819 1570 [] => (case P of
adamc@819 1571 [] => SOME []
adamc@819 1572 | _ => NONE)
adamc@819 1573 | q1 :: qs =>
adamc@819 1574 let
adamc@819 1575 val loc = #2 q1
adamc@819 1576
adamc@819 1577 fun unapp (t, acc) =
adamc@830 1578 case #1 t of
adamc@830 1579 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819 1580 | _ => (t, rev acc)
adamc@819 1581
adamc@830 1582 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830 1583 val t1 = hnormCon env t1
adam@1303 1584 fun doSub t = foldl (fn (arg, t) => subConInCon env (0, arg) t) t args
adamc@819 1585
adamc@819 1586 fun dtype (dtO, names) =
adamc@819 1587 let
adamc@819 1588 val nameSet = IS.addList (IS.empty, names)
adamc@819 1589 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819 1590 case ps of
adamc@819 1591 [] => fail 4
adamc@819 1592 | (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819 1593 (IS.delete (nameSet, patConNum pc)
adamc@819 1594 handle NotFound => nameSet)
adamc@819 1595 | _ => nameSet)
adamc@819 1596 nameSet P
adamc@819 1597 in
adamc@819 1598 nameSet
adamc@819 1599 end
adamc@819 1600
adamc@819 1601 fun default () = (NONE, IS.singleton 0, [])
adamc@819 1602
adamc@819 1603 val (dtO, unused, cons) =
adamc@830 1604 case #1 t1 of
adamc@819 1605 L'.CNamed n =>
adamc@819 1606 let
adamc@819 1607 val dt = E.lookupDatatype env n
adamc@819 1608 val cons = E.constructors dt
adamc@819 1609 in
adamc@819 1610 (SOME dt,
adamc@819 1611 dtype (SOME dt, map #2 cons),
adamc@819 1612 map (fn (_, n, co) =>
adamc@819 1613 (n,
adamc@819 1614 case co of
adamc@819 1615 NONE => []
adamc@819 1616 | SOME t => [("", doSub t)])) cons)
adamc@819 1617 end
adamc@819 1618 | L'.CModProj (m1, ms, x) =>
adamc@819 1619 let
adamc@819 1620 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1621 in
adamc@819 1622 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1623 NONE => default ()
adamc@819 1624 | SOME (_, cons) =>
adamc@819 1625 (NONE,
adamc@819 1626 dtype (NONE, map #2 cons),
adamc@819 1627 map (fn (s, _, co) =>
adamc@819 1628 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819 1629 case co of
adamc@819 1630 NONE => []
adamc@819 1631 | SOME t => [("", doSub t)])) cons)
adamc@819 1632 end
adamc@830 1633 | L'.TRecord t =>
adamc@830 1634 (case #1 (hnormCon env t) of
adamc@830 1635 L'.CRecord (_, xts) =>
adamc@830 1636 let
adamc@830 1637 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830 1638 | _ => NONE) xts
adamc@830 1639 in
adamc@830 1640 if List.all Option.isSome xts then
adamc@830 1641 let
adamc@830 1642 val xts = List.mapPartial (fn x => x) xts
adamc@830 1643 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830 1644 String.compare (x1, x2) = GREATER) xts
adamc@830 1645 in
adamc@830 1646 (NONE, IS.empty, [(0, xts)])
adamc@830 1647 end
adamc@830 1648 else
adamc@830 1649 default ()
adamc@830 1650 end
adamc@830 1651 | _ => default ())
adamc@819 1652 | _ => default ()
adamc@819 1653 in
adamc@819 1654 if IS.isEmpty unused then
adamc@819 1655 let
adamc@819 1656 fun recurse cons =
adamc@819 1657 case cons of
adamc@819 1658 [] => NONE
adamc@819 1659 | (name, args) :: cons =>
adamc@819 1660 case I (S (map #1 args, name, P),
adamc@819 1661 map #2 args @ qs) of
adamc@819 1662 NONE => recurse cons
adamc@819 1663 | SOME ps =>
adamc@819 1664 let
adamc@819 1665 val nargs = length args
adamc@819 1666 val argPs = List.take (ps, nargs)
adamc@819 1667 val restPs = List.drop (ps, nargs)
adamc@819 1668
adamc@819 1669 val p = case name of
adamc@819 1670 0 => L'.PRecord (ListPair.map
adamc@819 1671 (fn ((name, t), p) => (name, p, t))
adamc@819 1672 (args, argPs))
adamc@830 1673 | _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819 1674 case argPs of
adamc@819 1675 [] => NONE
adamc@819 1676 | [p] => SOME p
adamc@819 1677 | _ => fail 3)
adamc@819 1678 in
adamc@819 1679 SOME ((p, loc) :: restPs)
adamc@819 1680 end
adamc@819 1681 in
adamc@819 1682 recurse cons
adamc@819 1683 end
adamc@819 1684 else
adamc@819 1685 case I (D P, qs) of
adamc@819 1686 NONE => NONE
adamc@819 1687 | SOME ps =>
adamc@819 1688 let
adamc@819 1689 val p = case cons of
adamc@819 1690 [] => L'.PWild
adamc@819 1691 | (0, _) :: _ => L'.PWild
adamc@819 1692 | _ =>
adamc@819 1693 case IS.find (fn _ => true) unused of
adamc@819 1694 NONE => fail 6
adamc@819 1695 | SOME name =>
adamc@819 1696 case ListUtil.search (fn (name', args) =>
adamc@819 1697 if name = name' then
adamc@819 1698 SOME (name', args)
adamc@819 1699 else
adamc@819 1700 NONE) cons of
adamc@819 1701 SOME (n, []) =>
adamc@830 1702 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819 1703 | SOME (n, [_]) =>
adamc@830 1704 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819 1705 | _ => fail 7
adamc@819 1706 in
adamc@819 1707 SOME ((p, loc) :: ps)
adamc@819 1708 end
adamc@819 1709 end
adamc@819 1710 in
adamc@819 1711 case I (map (fn x => [x]) ps, [t]) of
adamc@819 1712 NONE => NONE
adamc@819 1713 | SOME [p] => SOME p
adamc@819 1714 | _ => fail 7
adamc@819 1715 end
adamc@819 1716
adamc@217 1717 fun unmodCon env (c, loc) =
adamc@217 1718 case c of
adamc@217 1719 L'.CNamed n =>
adamc@217 1720 (case E.lookupCNamed env n of
adamc@217 1721 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1722 | _ => (c, loc))
adamc@217 1723 | L'.CModProj (m1, ms, x) =>
adamc@217 1724 let
adamc@217 1725 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1726 in
adamc@217 1727 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1728 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1729 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1730 | _ => (c, loc)
adamc@217 1731 end
adamc@217 1732 | _ => (c, loc)
adamc@217 1733
adamc@721 1734 fun normClassKey env c =
adamc@467 1735 let
adamc@721 1736 val c = hnormCon env c
adamc@467 1737 in
adamc@467 1738 case #1 c of
adamc@467 1739 L'.CApp (c1, c2) =>
adamc@467 1740 let
adamc@721 1741 val c1 = normClassKey env c1
adamc@721 1742 val c2 = normClassKey env c2
adamc@467 1743 in
adamc@467 1744 (L'.CApp (c1, c2), #2 c)
adamc@467 1745 end
adamc@721 1746 | L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721 1747 normClassKey env c)) xcs), #2 c)
adamc@721 1748 | _ => unmodCon env c
adamc@467 1749 end
adamc@467 1750
adamc@467 1751 fun normClassConstraint env (c, loc) =
adamc@217 1752 case c of
adamc@217 1753 L'.CApp (f, x) =>
adamc@217 1754 let
adamc@721 1755 val f = normClassKey env f
adamc@467 1756 val x = normClassKey env x
adamc@217 1757 in
adamc@467 1758 (L'.CApp (f, x), loc)
adamc@217 1759 end
adamc@674 1760 | L'.TFun (c1, c2) =>
adamc@674 1761 let
adamc@674 1762 val c1 = normClassConstraint env c1
adamc@674 1763 val c2 = normClassConstraint env c2
adamc@674 1764 in
adamc@674 1765 (L'.TFun (c1, c2), loc)
adamc@674 1766 end
adamc@674 1767 | L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adam@1303 1768 | L'.CUnif (nl, _, _, _, ref (SOME c)) => normClassConstraint env (E.mliftConInCon nl c)
adamc@721 1769 | _ => unmodCon env (c, loc)
adamc@216 1770
adamc@1093 1771 fun findHead e e' =
adamc@1093 1772 let
adamc@1093 1773 fun findHead (e, _) =
adamc@1093 1774 case e of
adamc@1093 1775 L.EVar (_, _, infer) =>
adamc@1093 1776 let
adamc@1093 1777 fun findHead' (e, _) =
adamc@1093 1778 case e of
adamc@1093 1779 L'.ENamed _ => true
adamc@1093 1780 | L'.EModProj _ => true
adam@1472 1781 | L'.ERel _ => true
adamc@1093 1782 | L'.EApp (e, _) => findHead' e
adamc@1093 1783 | L'.ECApp (e, _) => findHead' e
adamc@1093 1784 | L'.EKApp (e, _) => findHead' e
adamc@1093 1785 | _ => false
adamc@1093 1786 in
adamc@1093 1787 if findHead' e' then
adamc@1093 1788 SOME infer
adamc@1093 1789 else
adamc@1093 1790 NONE
adamc@1093 1791 end
adamc@1093 1792 | L.EApp (e, _) => findHead e
adamc@1093 1793 | L.ECApp (e, _) => findHead e
adamc@1093 1794 | L.EDisjointApp e => findHead e
adamc@1093 1795 | _ => NONE
adamc@1093 1796 in
adamc@1093 1797 findHead e
adamc@1093 1798 end
adamc@1093 1799
adam@1570 1800 datatype needed = Needed of {Cons : L'.kind SM.map,
adamc@1264 1801 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264 1802 Vals : SS.set,
adamc@1270 1803 Mods : (E.env * needed) SM.map}
adamc@1264 1804
adamc@1264 1805 fun ncons (Needed r) = #Cons r
adamc@1264 1806 fun nconstraints (Needed r) = #Constraints r
adamc@1264 1807 fun nvals (Needed r) = #Vals r
adamc@1264 1808 fun nmods (Needed r) = #Mods r
adamc@1264 1809
adamc@1264 1810 val nempty = Needed {Cons = SM.empty,
adamc@1264 1811 Constraints = nil,
adamc@1264 1812 Vals = SS.empty,
adamc@1264 1813 Mods = SM.empty}
adamc@1264 1814
adamc@1264 1815 fun naddCon (r : needed, k, v) =
adamc@1264 1816 let
adamc@1264 1817 val Needed r = r
adamc@1264 1818 in
adamc@1264 1819 Needed {Cons = SM.insert (#Cons r, k, v),
adamc@1264 1820 Constraints = #Constraints r,
adamc@1264 1821 Vals = #Vals r,
adamc@1264 1822 Mods = #Mods r}
adamc@1264 1823 end
adamc@1264 1824
adamc@1264 1825 fun naddConstraint (r : needed, v) =
adamc@1264 1826 let
adamc@1264 1827 val Needed r = r
adamc@1264 1828 in
adamc@1264 1829 Needed {Cons = #Cons r,
adamc@1264 1830 Constraints = v :: #Constraints r,
adamc@1264 1831 Vals = #Vals r,
adamc@1264 1832 Mods = #Mods r}
adamc@1264 1833 end
adamc@1264 1834
adamc@1264 1835 fun naddVal (r : needed, k) =
adamc@1264 1836 let
adamc@1264 1837 val Needed r = r
adamc@1264 1838 in
adamc@1264 1839 Needed {Cons = #Cons r,
adamc@1264 1840 Constraints = #Constraints r,
adamc@1264 1841 Vals = SS.add (#Vals r, k),
adamc@1264 1842 Mods = #Mods r}
adamc@1264 1843 end
adamc@1264 1844
adamc@1264 1845 fun naddMod (r : needed, k, v) =
adamc@1264 1846 let
adamc@1264 1847 val Needed r = r
adamc@1264 1848 in
adamc@1264 1849 Needed {Cons = #Cons r,
adamc@1264 1850 Constraints = #Constraints r,
adamc@1264 1851 Vals = #Vals r,
adamc@1264 1852 Mods = SM.insert (#Mods r, k, v)}
adamc@1264 1853 end
adamc@1264 1854
adamc@1264 1855 fun ndelCon (r : needed, k) =
adamc@1264 1856 let
adamc@1264 1857 val Needed r = r
adamc@1264 1858 in
adamc@1264 1859 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adamc@1264 1860 Constraints = #Constraints r,
adamc@1264 1861 Vals = #Vals r,
adamc@1264 1862 Mods = #Mods r}
adamc@1264 1863 end
adamc@1264 1864
adamc@1264 1865 fun ndelVal (r : needed, k) =
adamc@1264 1866 let
adamc@1264 1867 val Needed r = r
adamc@1264 1868 in
adamc@1264 1869 Needed {Cons = #Cons r,
adamc@1264 1870 Constraints = #Constraints r,
adamc@1264 1871 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264 1872 Mods = #Mods r}
adamc@1264 1873 end
adamc@1264 1874
adam@1591 1875 fun chaseUnifs c =
adam@1591 1876 case #1 c of
adam@1591 1877 L'.CUnif (_, _, _, _, ref (SOME c)) => chaseUnifs c
adam@1591 1878 | _ => c
adam@1591 1879
adamc@92 1880 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1881 let
adamc@848 1882 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 1883 (*val befor = Time.now ()*)
adamc@280 1884
adamc@280 1885 val r = case e of
adamc@91 1886 L.EAnnot (e, t) =>
adamc@91 1887 let
adamc@91 1888 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1889 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1890 in
adamc@628 1891 checkCon env e' et t';
adamc@628 1892 (e', t', gs1 @ enD gs2)
adamc@91 1893 end
adamc@34 1894
adamc@91 1895 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1896 | L.EVar ([], s, infer) =>
adamc@91 1897 (case E.lookupE env s of
adamc@91 1898 E.NotBound =>
adamc@91 1899 (expError env (UnboundExp (loc, s));
adamc@91 1900 (eerror, cerror, []))
adamc@629 1901 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 1902 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1903 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1904 (case E.lookupStr env m1 of
adamc@91 1905 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1906 (eerror, cerror, []))
adamc@91 1907 | SOME (n, sgn) =>
adamc@91 1908 let
adamc@91 1909 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1910 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1911 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1912 (strerror, sgnerror))
adamc@91 1913 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1914 ((L'.StrVar n, loc), sgn) ms
adamc@10 1915
adamc@91 1916 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1917 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1918 cerror)
adamc@91 1919 | SOME t => t
adamc@91 1920 in
adamc@629 1921 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1922 end)
adamc@86 1923
adamc@349 1924 | L.EWild =>
adamc@210 1925 let
adamc@349 1926 val r = ref NONE
adamc@349 1927 val c = cunif (loc, (L'.KType, loc))
adamc@210 1928 in
adamc@349 1929 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1930 end
adamc@210 1931
adamc@91 1932 | L.EApp (e1, e2) =>
adamc@91 1933 let
adamc@91 1934 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093 1935
adamc@403 1936 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1937
adamc@91 1938 val dom = cunif (loc, ktype)
adamc@91 1939 val ran = cunif (loc, ktype)
adamc@838 1940 val t = (L'.TFun (dom, ran), loc)
adamc@1093 1941
adamc@1093 1942 val () = checkCon env e1' t1 t
adamc@1093 1943 val () = checkCon env e2' t2 dom
adamc@1093 1944
adamc@1093 1945 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093 1946 val (ef, et, gs3) =
adamc@1093 1947 case findHead e1 e1' of
adam@1591 1948 NONE => (ef, (#1 (chaseUnifs ran), loc), [])
adamc@1093 1949 | SOME infer => elabHead (env, denv) infer ef ran
adamc@91 1950 in
adamc@1093 1951 (ef, et, gs1 @ gs2 @ gs3)
adamc@91 1952 end
adamc@91 1953 | L.EAbs (x, to, e) =>
adamc@91 1954 let
adamc@91 1955 val (t', gs1) = case to of
adamc@91 1956 NONE => (cunif (loc, ktype), [])
adamc@91 1957 | SOME t =>
adamc@91 1958 let
adamc@91 1959 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1960 in
adamc@91 1961 checkKind env t' tk ktype;
adamc@91 1962 (t', gs)
adamc@91 1963 end
adamc@467 1964 val dom = normClassConstraint env t'
adamc@467 1965 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1966 in
adamc@91 1967 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1968 (L'.TFun (t', et), loc),
adamc@467 1969 enD gs1 @ gs2)
adamc@91 1970 end
adamc@91 1971 | L.ECApp (e, c) =>
adamc@91 1972 let
adamc@91 1973 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093 1974
adamc@328 1975 val oldEt = et
adamc@403 1976 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 1977 val (et', _) = hnormCon env et
adamc@91 1978 in
adamc@91 1979 case et' of
adamc@91 1980 L'.CError => (eerror, cerror, [])
adamc@328 1981 | L'.TCFun (_, x, k, eb) =>
adamc@91 1982 let
adamc@91 1983 val () = checkKind env c' ck k
adam@1303 1984 val eb' = subConInCon env (0, c') eb
adamc@1093 1985
adamc@1093 1986 val ef = (L'.ECApp (e', c'), loc)
adamc@1093 1987 val (ef, eb', gs3) =
adamc@1093 1988 case findHead e e' of
adamc@1093 1989 NONE => (ef, eb', [])
adamc@1093 1990 | SOME infer => elabHead (env, denv) infer ef eb'
adamc@91 1991 in
adamc@328 1992 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1993 ("et", p_con env oldEt),
adamc@328 1994 ("x", PD.string x),
adamc@328 1995 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1996 ("c", p_con env c'),
adamc@328 1997 ("eb'", p_con env eb')];*)
adam@1591 1998 (ef, (#1 eb', loc), gs1 @ enD gs2 @ gs3)
adamc@91 1999 end
adamc@91 2000
adamc@91 2001 | _ =>
adamc@91 2002 (expError env (WrongForm ("constructor function", e', et));
adamc@91 2003 (eerror, cerror, []))
adamc@91 2004 end
adamc@91 2005 | L.ECAbs (expl, x, k, e) =>
adamc@91 2006 let
adamc@91 2007 val expl' = elabExplicitness expl
adamc@623 2008 val k' = elabKind env k
adamc@328 2009
adamc@328 2010 val env' = E.pushCRel env x k'
adamc@328 2011 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 2012 in
adamc@91 2013 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 2014 (L'.TCFun (expl', x, k', et), loc),
adamc@91 2015 gs)
adamc@91 2016 end
adamc@623 2017 | L.EKAbs (x, e) =>
adamc@623 2018 let
adamc@623 2019 val env' = E.pushKRel env x
adamc@623 2020 val (e', et, gs) = elabExp (env', denv) e
adamc@623 2021 in
adamc@623 2022 ((L'.EKAbs (x, e'), loc),
adamc@623 2023 (L'.TKFun (x, et), loc),
adamc@623 2024 gs)
adamc@623 2025 end
adamc@91 2026
adamc@91 2027 | L.EDisjoint (c1, c2, e) =>
adamc@91 2028 let
adamc@91 2029 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 2030 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 2031
adamc@91 2032 val ku1 = kunif loc
adamc@91 2033 val ku2 = kunif loc
adamc@91 2034
adamc@628 2035 val denv' = D.assert env denv (c1', c2')
adamc@628 2036 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 2037 in
adamc@91 2038 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 2039 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 2040
adamc@628 2041 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 2042 end
adamc@629 2043 | L.EDisjointApp e =>
adamc@629 2044 let
adamc@629 2045 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 2046
adamc@629 2047 val k1 = kunif loc
adamc@629 2048 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629 2049 val k2 = kunif loc
adamc@629 2050 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629 2051 val t' = cunif (loc, ktype)
adamc@629 2052 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 2053 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 2054 in
adam@1591 2055 (e', (#1 (chaseUnifs t'), loc), enD gs2 @ gs1)
adamc@629 2056 end
adamc@91 2057
adamc@91 2058 | L.ERecord xes =>
adamc@91 2059 let
adamc@91 2060 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 2061 let
adamc@91 2062 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 2063 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 2064 in
adamc@91 2065 checkKind env x' xk kname;
adamc@228 2066 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 2067 end)
adamc@91 2068 [] xes
adamc@91 2069
adamc@91 2070 val k = (L'.KType, loc)
adamc@91 2071
adamc@91 2072 fun prove (xets, gs) =
adamc@91 2073 case xets of
adamc@91 2074 [] => gs
adamc@91 2075 | (x, _, t) :: rest =>
adamc@91 2076 let
adamc@91 2077 val xc = (x, t)
adamc@91 2078 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 2079 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 2080 let
adamc@91 2081 val xc' = (x', t')
adamc@91 2082 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 2083 in
adamc@91 2084 D.prove env denv (r1, r2, loc) @ gs
adamc@91 2085 end)
adamc@91 2086 gs rest
adamc@91 2087 in
adamc@91 2088 prove (rest, gs)
adamc@91 2089 end
adamc@228 2090
adamc@228 2091 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 2092 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 2093 in
adamc@255 2094 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 2095 ((L'.ERecord xes', loc),
adamc@91 2096 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 2097 enD (prove (xes', gsD)) @ gsO)
adamc@91 2098 end
adamc@91 2099
adamc@91 2100 | L.EField (e, c) =>
adamc@91 2101 let
adamc@91 2102 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 2103 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 2104
adamc@91 2105 val ft = cunif (loc, ktype)
adamc@91 2106 val rest = cunif (loc, ktype_record)
adamc@91 2107 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2108 val () = checkCon env e' et
adamc@629 2109 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 2110 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 2111 in
adamc@628 2112 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 2113 end
adamc@91 2114
adamc@445 2115 | L.EConcat (e1, e2) =>
adamc@339 2116 let
adamc@339 2117 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 2118 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 2119
adamc@445 2120 val r1 = cunif (loc, ktype_record)
adamc@445 2121 val r2 = cunif (loc, ktype_record)
adamc@445 2122
adamc@629 2123 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 2124 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 2125
adamc@628 2126 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 2127 in
adamc@445 2128 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 2129 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 2130 gs1 @ gs2 @ enD gs3)
adamc@339 2131 end
adamc@149 2132 | L.ECut (e, c) =>
adamc@149 2133 let
adamc@149 2134 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 2135 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 2136
adamc@149 2137 val ft = cunif (loc, ktype)
adamc@149 2138 val rest = cunif (loc, ktype_record)
adamc@149 2139 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2140
adamc@629 2141 val () = checkCon env e' et
adamc@629 2142 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 2143
adamc@628 2144 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 2145 in
adam@1299 2146 checkKind env c' ck kname;
adamc@228 2147 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2148 gs1 @ enD gs2 @ enD gs3)
adamc@149 2149 end
adamc@493 2150 | L.ECutMulti (e, c) =>
adamc@493 2151 let
adamc@493 2152 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 2153 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 2154
adamc@493 2155 val rest = cunif (loc, ktype_record)
adamc@629 2156
adamc@629 2157 val () = checkCon env e' et
adamc@629 2158 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 2159
adamc@628 2160 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 2161 in
adam@1299 2162 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493 2163 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2164 gs1 @ enD gs2 @ enD gs3)
adamc@493 2165 end
adamc@149 2166
adamc@171 2167 | L.ECase (e, pes) =>
adamc@171 2168 let
adamc@171 2169 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 2170 val result = cunif (loc, (L'.KType, loc))
adamc@171 2171 val (pes', gs) = ListUtil.foldlMap
adamc@171 2172 (fn ((p, e), gs) =>
adamc@171 2173 let
adamc@628 2174 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 2175
adamc@629 2176 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 2177 in
adamc@628 2178 checkPatCon env p' pt et;
adamc@629 2179 checkCon env e' et' result;
adamc@628 2180 ((p', e'), gs1 @ gs)
adamc@171 2181 end)
adamc@171 2182 gs1 pes
adamc@171 2183 in
adamc@819 2184 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 2185 NONE => ()
adamc@830 2186 | SOME p => if !mayDelay then
adamc@830 2187 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 2188 else
adamc@830 2189 expError env (Inexhaustive (loc, p));
adamc@172 2190
adamc@628 2191 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 2192 end
adamc@447 2193
adamc@447 2194 | L.ELet (eds, e) =>
adamc@447 2195 let
adamc@447 2196 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 2197 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 2198 in
adamc@825 2199 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 2200 end
adamc@280 2201 in
adamc@819 2202 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 2203 r
adamc@91 2204 end
adamc@31 2205
adamc@628 2206 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 2207 let
adamc@447 2208 val r =
adamc@447 2209 case d of
adamc@825 2210 L.EDVal (p, e) =>
adamc@447 2211 let
adamc@825 2212 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 2213 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 2214
adamc@825 2215 val () = checkCon env e' et pt
adamc@825 2216
adam@1554 2217 val env' = E.patBinds env p'
adam@1554 2218 (* Redo to get proper detection of type class witnesses *)
adam@1554 2219
adamc@825 2220 val pt = normClassConstraint env pt
adamc@447 2221 in
adamc@830 2222 case exhaustive (env, et, [p'], loc) of
adamc@830 2223 NONE => ()
adamc@830 2224 | SOME p => if !mayDelay then
adamc@830 2225 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 2226 else
adamc@830 2227 expError env (Inexhaustive (loc, p));
adamc@830 2228
adamc@825 2229 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 2230 end
adamc@447 2231 | L.EDValRec vis =>
adamc@447 2232 let
adamc@447 2233 fun allowable (e, _) =
adamc@447 2234 case e of
adamc@447 2235 L.EAbs _ => true
adamc@447 2236 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 2237 | L.EKAbs (_, e) => allowable e
adamc@447 2238 | L.EDisjoint (_, _, e) => allowable e
adamc@447 2239 | _ => false
adamc@447 2240
adamc@447 2241 val (vis, gs) = ListUtil.foldlMap
adamc@447 2242 (fn ((x, co, e), gs) =>
adamc@447 2243 let
adamc@447 2244 val (c', _, gs1) = case co of
adamc@447 2245 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 2246 | SOME c => elabCon (env, denv) c
adamc@447 2247 in
adamc@447 2248 ((x, c', e), enD gs1 @ gs)
adamc@447 2249 end) gs vis
adamc@447 2250
adamc@447 2251 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 2252
adamc@447 2253 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 2254 let
adamc@447 2255 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 2256 in
adamc@628 2257 checkCon env e' et c';
adamc@447 2258 if allowable e then
adamc@447 2259 ()
adamc@447 2260 else
adamc@447 2261 expError env (IllegalRec (x, e'));
adamc@628 2262 ((x, c', e'), gs1 @ gs)
adamc@447 2263 end) gs vis
adamc@447 2264 in
adamc@447 2265 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 2266 end
adamc@447 2267 in
adamc@447 2268 r
adamc@447 2269 end
adamc@447 2270
adamc@42 2271 val hnormSgn = E.hnormSgn
adamc@31 2272
adamc@210 2273 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 2274 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 2275 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2276 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2277 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2278 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2279
adamc@469 2280 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2281 case E.lookupStr env str of
adamc@469 2282 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2283 denv)
adamc@469 2284 | SOME (n, sgn) =>
adamc@469 2285 let
adamc@469 2286 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2287 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2288 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2289 (strerror, sgnerror))
adamc@469 2290 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2291 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2292
adamc@1030 2293 fun collect first (st, sgn) =
adamc@1030 2294 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182 2295 NONE => []
adamc@1030 2296 | SOME cs =>
adamc@1030 2297 case #1 (hnormSgn env sgn) of
adamc@1030 2298 L'.SgnConst sgis =>
adamc@1030 2299 foldl (fn (sgi, cs) =>
adamc@1030 2300 case #1 sgi of
adamc@1030 2301 L'.SgiStr (x, _, _) =>
adamc@1030 2302 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2303 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2304 | SOME sgn' =>
adamc@1030 2305 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2306 cs))
adamc@1030 2307 | _ => cs) cs sgis
adamc@1030 2308 | _ => cs
adamc@469 2309 in
adamc@1030 2310 foldl (fn ((c1, c2), denv) =>
adamc@1030 2311 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2312 end
adamc@469 2313
adamc@88 2314 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270 2315 ((*Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));*)
adamc@1270 2316 case sgi of
adamc@1270 2317 L.SgiConAbs (x, k) =>
adamc@1270 2318 let
adamc@1270 2319 val k' = elabKind env k
adamc@1270 2320
adamc@1270 2321 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270 2322 in
adamc@1270 2323 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270 2324 end
adamc@1270 2325
adamc@1270 2326 | L.SgiCon (x, ko, c) =>
adamc@1270 2327 let
adamc@1270 2328 val k' = case ko of
adamc@1270 2329 NONE => kunif loc
adamc@1270 2330 | SOME k => elabKind env k
adamc@1270 2331
adamc@1270 2332 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2333 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270 2334 in
adamc@1270 2335 checkKind env c' ck k';
adamc@1270 2336
adamc@1270 2337 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2338 end
adamc@1270 2339
adamc@1270 2340 | L.SgiDatatype dts =>
adamc@1270 2341 let
adamc@1270 2342 val k = (L'.KType, loc)
adamc@1270 2343
adamc@1270 2344 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270 2345 let
adamc@1270 2346 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2347 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270 2348 in
adamc@1270 2349 ((x, n, xs, xcs), env)
adamc@1270 2350 end)
adamc@1270 2351 env dts
adamc@1270 2352
adamc@1270 2353 val (dts, env) = ListUtil.foldlMap
adamc@1270 2354 (fn ((x, n, xs, xcs), env) =>
adamc@1270 2355 let
adamc@1270 2356 val t = (L'.CNamed n, loc)
adamc@1270 2357 val nxs = length xs - 1
adamc@1270 2358 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270 2359 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270 2360
adamc@1270 2361 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270 2362 (E.pushCRel env' x k,
adamc@1270 2363 D.enter denv')) (env, denv) xs
adamc@1270 2364
adamc@1270 2365 val (xcs, (used, env, gs)) =
adamc@1270 2366 ListUtil.foldlMap
adamc@1270 2367 (fn ((x, to), (used, env, gs)) =>
adamc@1270 2368 let
adamc@1270 2369 val (to, t, gs') = case to of
adamc@1270 2370 NONE => (NONE, t, gs)
adamc@1270 2371 | SOME t' =>
adamc@1270 2372 let
adamc@1270 2373 val (t', tk, gs') =
adamc@1270 2374 elabCon (env', denv') t'
adamc@1270 2375 in
adamc@1270 2376 checkKind env' t' tk k;
adamc@1270 2377 (SOME t',
adamc@1270 2378 (L'.TFun (t', t), loc),
adamc@1270 2379 gs' @ gs)
adamc@1270 2380 end
adamc@1270 2381 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2382 t xs
adamc@1270 2383
adamc@1270 2384 val (env, n') = E.pushENamed env x t
adamc@1270 2385 in
adamc@1270 2386 if SS.member (used, x) then
adamc@1270 2387 strError env (DuplicateConstructor (x, loc))
adamc@1270 2388 else
adamc@1270 2389 ();
adamc@1270 2390 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270 2391 end)
adamc@1270 2392 (SS.empty, env, []) xcs
adamc@1270 2393 in
adamc@1270 2394 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270 2395 end)
adamc@1270 2396 env dts
adamc@1270 2397 in
adamc@1270 2398 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270 2399 end
adamc@1270 2400
adamc@1270 2401 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270 2402
adamc@1270 2403 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270 2404 (case E.lookupStr env m1 of
adamc@1270 2405 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270 2406 ([], (env, denv, gs)))
adamc@1270 2407 | SOME (n, sgn) =>
adamc@1270 2408 let
adamc@1270 2409 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270 2410 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270 2411 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270 2412 (strerror, sgnerror))
adamc@1270 2413 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270 2414 ((L'.StrVar n, loc), sgn) ms
adamc@1270 2415 in
adamc@1270 2416 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270 2417 (L'.CModProj (n, ms, s), _) =>
adamc@1270 2418 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270 2419 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270 2420 ([], (env, denv, [])))
adamc@1270 2421 | SOME (xs, xncs) =>
adamc@1270 2422 let
adamc@1270 2423 val k = (L'.KType, loc)
adamc@1270 2424 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2425
adamc@1270 2426 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270 2427 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270 2428 val env = E.pushDatatype env n' xs xncs
adamc@1270 2429
adamc@1270 2430 val t = (L'.CNamed n', loc)
adamc@1270 2431 val env = foldl (fn ((x, n, to), env) =>
adamc@805 2432 let
adamc@1270 2433 val t = case to of
adamc@1270 2434 NONE => t
adamc@1270 2435 | SOME t' => (L'.TFun (t', t), loc)
adamc@1270 2436
adamc@1270 2437 val t = foldr (fn (x, t) =>
adamc@1270 2438 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2439 t xs
adamc@805 2440 in
adamc@1270 2441 E.pushENamedAs env x n t
adamc@1270 2442 end) env xncs
adamc@1270 2443 in
adamc@1270 2444 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270 2445 end)
adamc@1270 2446 | _ => (strError env (NotDatatype loc);
adamc@1270 2447 ([], (env, denv, [])))
adamc@1270 2448 end)
adamc@1270 2449
adamc@1270 2450 | L.SgiVal (x, c) =>
adamc@1270 2451 let
adamc@1270 2452 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2453
adamc@1270 2454 val old = c'
adamc@1270 2455 val c' = normClassConstraint env c'
adamc@1270 2456 val (env', n) = E.pushENamed env x c'
adamc@1270 2457 in
adamc@1270 2458 (unifyKinds env ck ktype
adamc@1270 2459 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@1270 2460
adamc@1270 2461 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2462 end
adamc@1270 2463
adamc@1270 2464 | L.SgiTable (x, c, pe, ce) =>
adamc@1270 2465 let
adamc@1270 2466 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270 2467
adamc@1270 2468 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2469 val pkey = cunif (loc, cstK)
adamc@1270 2470 val visible = cunif (loc, cstK)
adamc@1270 2471 val (env', ds, uniques) =
adamc@1270 2472 case (#1 pe, #1 ce) of
adamc@1270 2473 (L.EVar (["Basis"], "no_primary_key", _), L.EVar (["Basis"], "no_constraint", _)) =>
adamc@1270 2474 let
adamc@1270 2475 val x' = x ^ "_hidden_constraints"
adamc@1270 2476 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@1270 2477 val hidden = (L'.CNamed hidden_n, loc)
adamc@1270 2478 in
adamc@1270 2479 (env', [(L'.SgiConAbs (x', hidden_n, cstK), loc)], (L'.CConcat (visible, hidden), loc))
adamc@1270 2480 end
adamc@1270 2481 | _ => (env, [], visible)
adamc@1270 2482
adamc@1270 2483 val ct = tableOf ()
adamc@1270 2484 val ct = (L'.CApp (ct, c'), loc)
adamc@1270 2485 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270 2486
adamc@1270 2487 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270 2488 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2489 | _ => NONE) gs''
adamc@707 2490
adamc@1270 2491 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270 2492 val pst = (L'.CApp (pst, c'), loc)
adamc@1270 2493 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270 2494
adamc@1270 2495 val (env', n) = E.pushENamed env' x ct
adamc@1270 2496
adamc@1270 2497 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270 2498 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270 2499 | _ => NONE) gs'''
adamc@1270 2500
adamc@1270 2501 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270 2502 val cst = (L'.CApp (cst, c'), loc)
adamc@1270 2503 val cst = (L'.CApp (cst, visible), loc)
adamc@1270 2504 in
adamc@1270 2505 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270 2506 checkCon env' pe' pet pst;
adamc@1270 2507 checkCon env' ce' cet cst;
adamc@1270 2508
adamc@1270 2509 (ds @ [(L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270 2510 end
adamc@1270 2511
adamc@1270 2512 | L.SgiStr (x, sgn) =>
adamc@1270 2513 let
adamc@1270 2514 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2515 val (env', n) = E.pushStrNamed env x sgn'
adamc@1270 2516 in
adamc@1270 2517 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2518 end
adamc@1270 2519
adamc@1270 2520 | L.SgiSgn (x, sgn) =>
adamc@1270 2521 let
adamc@1270 2522 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2523 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270 2524 in
adamc@1270 2525 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2526 end
adamc@1270 2527
adamc@1270 2528 | L.SgiInclude sgn =>
adamc@1270 2529 let
adamc@1270 2530 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2531 in
adamc@1270 2532 case #1 (hnormSgn env sgn') of
adamc@1270 2533 L'.SgnConst sgis =>
adamc@1270 2534 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270 2535 | _ => (sgnError env (NotIncludable sgn');
adamc@1270 2536 ([], (env, denv, [])))
adamc@1270 2537 end
adamc@1270 2538
adamc@1270 2539 | L.SgiConstraint (c1, c2) =>
adamc@1270 2540 let
adamc@1270 2541 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270 2542 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270 2543
adamc@1270 2544 val denv = D.assert env denv (c1', c2')
adamc@1270 2545 in
adamc@1270 2546 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@1270 2547 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@1270 2548
adamc@1270 2549 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270 2550 end
adamc@1270 2551
adamc@1270 2552 | L.SgiClassAbs (x, k) =>
adamc@1270 2553 let
adamc@1270 2554 val k = elabKind env k
adamc@1270 2555 val (env, n) = E.pushCNamed env x k NONE
adamc@1270 2556 val env = E.pushClass env n
adamc@1270 2557 in
adamc@1270 2558 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270 2559 end
adamc@1270 2560
adamc@1270 2561 | L.SgiClass (x, k, c) =>
adamc@1270 2562 let
adamc@1270 2563 val k = elabKind env k
adamc@1270 2564 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270 2565 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270 2566 val env = E.pushClass env n
adamc@1270 2567 in
adamc@1270 2568 checkKind env c' ck k;
adamc@1270 2569 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270 2570 end)
adamc@211 2571
adamc@83 2572 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2573 case sgn of
adamc@31 2574 L.SgnConst sgis =>
adamc@31 2575 let
adamc@88 2576 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2577
adamc@62 2578 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2579 case sgi of
adamc@62 2580 L'.SgiConAbs (x, _, _) =>
adamc@62 2581 (if SS.member (cons, x) then
adamc@62 2582 sgnError env (DuplicateCon (loc, x))
adamc@62 2583 else
adamc@62 2584 ();
adamc@62 2585 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2586 | L'.SgiCon (x, _, _, _) =>
adamc@62 2587 (if SS.member (cons, x) then
adamc@62 2588 sgnError env (DuplicateCon (loc, x))
adamc@62 2589 else
adamc@62 2590 ();
adamc@62 2591 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2592 | L'.SgiDatatype dts =>
adamc@156 2593 let
adamc@805 2594 val (cons, vals) =
adamc@805 2595 let
adamc@805 2596 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2597 let
adamc@805 2598 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2599 (if SS.member (vals, x) then
adamc@805 2600 sgnError env (DuplicateVal (loc, x))
adamc@805 2601 else
adamc@805 2602 ();
adamc@805 2603 SS.add (vals, x)))
adamc@805 2604 vals xncs
adamc@805 2605 in
adamc@805 2606 if SS.member (cons, x) then
adamc@805 2607 sgnError env (DuplicateCon (loc, x))
adamc@805 2608 else
adamc@805 2609 ();
adamc@805 2610 (SS.add (cons, x), vals)
adamc@805 2611 end
adamc@805 2612 in
adamc@805 2613 foldl doOne (cons, vals) dts
adamc@805 2614 end
adamc@156 2615 in
adamc@805 2616 (cons, vals, sgns, strs)
adamc@156 2617 end
adamc@191 2618 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2619 (if SS.member (cons, x) then
adamc@156 2620 sgnError env (DuplicateCon (loc, x))
adamc@156 2621 else
adamc@156 2622 ();
adamc@156 2623 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2624 | L'.SgiVal (x, _, _) =>
adamc@62 2625 (if SS.member (vals, x) then
adamc@62 2626 sgnError env (DuplicateVal (loc, x))
adamc@62 2627 else
adamc@62 2628 ();
adamc@62 2629 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2630 | L'.SgiSgn (x, _, _) =>
adamc@62 2631 (if SS.member (sgns, x) then
adamc@62 2632 sgnError env (DuplicateSgn (loc, x))
adamc@62 2633 else
adamc@62 2634 ();
adamc@62 2635 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2636 | L'.SgiStr (x, _, _) =>
adamc@62 2637 (if SS.member (strs, x) then
adamc@62 2638 sgnError env (DuplicateStr (loc, x))
adamc@62 2639 else
adamc@62 2640 ();
adamc@88 2641 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2642 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2643 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2644 (if SS.member (cons, x) then
adamc@211 2645 sgnError env (DuplicateCon (loc, x))
adamc@211 2646 else
adamc@211 2647 ();
adamc@211 2648 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2649 | L'.SgiClass (x, _, _, _) =>
adamc@211 2650 (if SS.member (cons, x) then
adamc@211 2651 sgnError env (DuplicateCon (loc, x))
adamc@211 2652 else
adamc@211 2653 ();
adamc@460 2654 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2655 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2656 in
adamc@83 2657 ((L'.SgnConst sgis', loc), gs)
adamc@31 2658 end
adamc@31 2659 | L.SgnVar x =>
adamc@31 2660 (case E.lookupSgn env x of
adamc@31 2661 NONE =>
adamc@31 2662 (sgnError env (UnboundSgn (loc, x));
adamc@83 2663 ((L'.SgnError, loc), []))
adamc@83 2664 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2665 | L.SgnFun (m, dom, ran) =>
adamc@41 2666 let
adamc@83 2667 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2668 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2669 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2670 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2671 in
adamc@83 2672 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2673 end
adamc@42 2674 | L.SgnWhere (sgn, x, c) =>
adamc@42 2675 let
adamc@83 2676 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2677 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2678 in
adamc@42 2679 case #1 (hnormSgn env sgn') of
adamc@83 2680 L'.SgnError => (sgnerror, [])
adamc@42 2681 | L'.SgnConst sgis =>
adamc@75 2682 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2683 x' = x andalso
adamc@623 2684 (unifyKinds env k ck
adamc@75 2685 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2686 true)
adamc@42 2687 | _ => false) sgis then
adamc@83 2688 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2689 else
adamc@42 2690 (sgnError env (UnWhereable (sgn', x));
adamc@83 2691 (sgnerror, []))
adamc@42 2692 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2693 (sgnerror, []))
adamc@42 2694 end
adamc@59 2695 | L.SgnProj (m, ms, x) =>
adamc@59 2696 (case E.lookupStr env m of
adamc@59 2697 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2698 (sgnerror, []))
adamc@59 2699 | SOME (n, sgn) =>
adamc@59 2700 let
adamc@59 2701 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2702 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2703 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2704 (strerror, sgnerror))
adamc@59 2705 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2706 ((L'.StrVar n, loc), sgn) ms
adamc@59 2707 in
adamc@59 2708 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2709 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2710 (sgnerror, []))
adamc@83 2711 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2712 end)
adamc@59 2713
adamc@31 2714
adamc@706 2715 and selfify env {str, strs, sgn} =
adamc@66 2716 case #1 (hnormSgn env sgn) of
adamc@66 2717 L'.SgnError => sgn
adamc@66 2718 | L'.SgnVar _ => sgn
adamc@66 2719
adamc@66 2720 | L'.SgnConst sgis =>
adam@1387 2721 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387 2722 (fn (sgi, env) =>
adam@1387 2723 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387 2724 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2725 | (L'.SgiDatatype dts, loc) =>
adam@1387 2726 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387 2727 | (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387 2728 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2729 | (L'.SgiStr (x, n, sgn), loc) =>
adam@1387 2730 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387 2731 | x => [x],
adam@1387 2732 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66 2733 | L'.SgnFun _ => sgn
adamc@66 2734 | L'.SgnWhere _ => sgn
adamc@66 2735 | L'.SgnProj (m, ms, x) =>
adamc@66 2736 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2737 (L'.StrVar m, #2 sgn) ms,
adamc@66 2738 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2739 field = x} of
adamc@66 2740 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2741 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2742
adamc@706 2743 and selfifyAt env {str, sgn} =
adamc@66 2744 let
adamc@66 2745 fun self (str, _) =
adamc@66 2746 case str of
adamc@66 2747 L'.StrVar x => SOME (x, [])
adamc@66 2748 | L'.StrProj (str, x) =>
adamc@66 2749 (case self str of
adamc@66 2750 NONE => NONE
adamc@66 2751 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2752 | _ => NONE
adamc@66 2753 in
adamc@66 2754 case self str of
adamc@66 2755 NONE => sgn
adamc@66 2756 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2757 end
adamc@66 2758
adamc@706 2759 and dopen env {str, strs, sgn} =
adamc@66 2760 let
adam@1527 2761 fun isVisible x = x <> "" andalso String.sub (x, 0) <> #"?"
adam@1527 2762
adamc@66 2763 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2764 (L'.StrVar str, #2 sgn) strs
adamc@66 2765 in
adamc@66 2766 case #1 (hnormSgn env sgn) of
adamc@66 2767 L'.SgnConst sgis =>
adamc@805 2768 ListUtil.foldlMapConcat
adamc@805 2769 (fn ((sgi, loc), env') =>
adamc@805 2770 let
adamc@805 2771 val d =
adamc@805 2772 case sgi of
adamc@805 2773 L'.SgiConAbs (x, n, k) =>
adam@1527 2774 if isVisible x then
adam@1527 2775 let
adam@1527 2776 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2777 in
adam@1527 2778 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2779 end
adam@1527 2780 else
adam@1527 2781 []
adamc@805 2782 | L'.SgiCon (x, n, k, c) =>
adam@1527 2783 if isVisible x then
adam@1527 2784 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1527 2785 else
adam@1527 2786 []
adamc@805 2787 | L'.SgiDatatype dts =>
adam@1527 2788 List.mapPartial (fn (x, n, xs, xncs) => if isVisible x then
adam@1527 2789 SOME (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adam@1527 2790 else
adam@1527 2791 NONE) dts
adamc@805 2792 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adam@1527 2793 if isVisible x then
adam@1527 2794 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adam@1527 2795 else
adam@1527 2796 []
adamc@805 2797 | L'.SgiVal (x, n, t) =>
adam@1527 2798 if isVisible x then
adam@1527 2799 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adam@1527 2800 else
adam@1527 2801 []
adamc@805 2802 | L'.SgiStr (x, n, sgn) =>
adam@1527 2803 if isVisible x then
adam@1527 2804 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adam@1527 2805 else
adam@1527 2806 []
adamc@805 2807 | L'.SgiSgn (x, n, sgn) =>
adam@1527 2808 if isVisible x then
adam@1527 2809 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adam@1527 2810 else
adam@1527 2811 []
adamc@805 2812 | L'.SgiConstraint (c1, c2) =>
adamc@805 2813 [(L'.DConstraint (c1, c2), loc)]
adamc@805 2814 | L'.SgiClassAbs (x, n, k) =>
adam@1527 2815 if isVisible x then
adam@1527 2816 let
adam@1527 2817 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2818 in
adam@1527 2819 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2820 end
adam@1527 2821 else
adam@1527 2822 []
adamc@805 2823 | L'.SgiClass (x, n, k, _) =>
adam@1527 2824 if isVisible x then
adam@1527 2825 let
adam@1527 2826 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2827 in
adam@1527 2828 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2829 end
adam@1527 2830 else
adam@1527 2831 []
adamc@805 2832 in
adamc@805 2833 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 2834 end)
adamc@805 2835 env sgis
adamc@66 2836 | _ => (strError env (UnOpenable sgn);
adamc@628 2837 ([], env))
adamc@66 2838 end
adamc@66 2839
adamc@706 2840 and sgiOfDecl (d, loc) =
adamc@31 2841 case d of
adamc@123 2842 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2843 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2844 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2845 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2846 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2847 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2848 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2849 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2850 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2851 | L'.DExport _ => []
adamc@707 2852 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 2853 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 2854 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 2855 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 2856 | L'.DView (tn, x, n, _, c) =>
adamc@754 2857 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563 2858 | L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271 2859 | L'.DDatabase _ => []
adamc@460 2860 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 2861 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075 2862 | L'.DTask _ => []
adamc@1199 2863 | L'.DPolicy _ => []
adam@1294 2864 | L'.DOnError _ => []
adamc@88 2865
adamc@1000 2866 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 2867 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2868 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2869 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2870 (L'.SgnError, _) => ()
adamc@31 2871 | (_, L'.SgnError) => ()
adamc@31 2872
adamc@31 2873 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2874 let
adamc@362 2875 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2876 ("sgn2", p_sgn env sgn2),
adamc@362 2877 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2878 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2879
adamc@838 2880 fun cpart n = IM.find (!counterparts, n)
adamc@838 2881 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 2882
adamc@838 2883 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 2884 con = fn c =>
adamc@838 2885 case c of
adamc@838 2886 L'.CNamed n2 =>
adamc@838 2887 (case cpart n2 of
adamc@838 2888 NONE => c
adamc@838 2889 | SOME n1 => L'.CNamed n1)
adamc@838 2890 | _ => c}
adamc@838 2891
adamc@628 2892 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 2893 let
adamc@362 2894 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2895
adamc@805 2896 fun seek' f p =
adamc@31 2897 let
adamc@628 2898 fun seek env ls =
adamc@31 2899 case ls of
adamc@805 2900 [] => f env
adamc@31 2901 | h :: t =>
adamc@469 2902 case p (env, h) of
adamc@469 2903 NONE =>
adamc@469 2904 let
adamc@469 2905 val env = case #1 h of
adamc@469 2906 L'.SgiCon (x, n, k, c) =>
adamc@471 2907 if E.checkENamed env n then
adamc@471 2908 env
adamc@471 2909 else
adamc@471 2910 E.pushCNamedAs env x n k (SOME c)
adamc@469 2911 | L'.SgiConAbs (x, n, k) =>
adamc@471 2912 if E.checkENamed env n then
adamc@471 2913 env
adamc@471 2914 else
adamc@471 2915 E.pushCNamedAs env x n k NONE
adamc@469 2916 | _ => env
adamc@469 2917 in
adamc@628 2918 seek (E.sgiBinds env h) t
adamc@469 2919 end
adamc@88 2920 | SOME envs => envs
adamc@31 2921 in
adamc@628 2922 seek env sgis1
adamc@31 2923 end
adamc@805 2924
adamc@1000 2925 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 2926 env))
adamc@31 2927 in
adamc@31 2928 case sgi of
adamc@31 2929 L'.SgiConAbs (x, n2, k2) =>
adam@1591 2930 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@31 2931 let
adamc@41 2932 fun found (x', n1, k1, co1) =
adamc@41 2933 if x = x' then
adamc@41 2934 let
adamc@623 2935 val () = unifyKinds env k1 k2
adamc@41 2936 handle KUnify (k1, k2, err) =>
adam@1591 2937 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000 2938 sgi2All, k2, err))
adamc@41 2939 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2940 in
adamc@41 2941 SOME (if n1 = n2 then
adamc@41 2942 env
adamc@41 2943 else
adamc@838 2944 (cparts (n2, n1);
adamc@838 2945 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 2946 end
adamc@41 2947 else
adamc@41 2948 NONE
adamc@31 2949 in
adamc@31 2950 case sgi1 of
adamc@41 2951 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2952 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 2953 | L'.SgiDatatype dts =>
adamc@191 2954 let
adamc@191 2955 val k = (L'.KType, loc)
adamc@805 2956
adamc@805 2957 fun search dts =
adamc@805 2958 case dts of
adamc@805 2959 [] => NONE
adamc@805 2960 | (x', n1, xs, _) :: dts =>
adamc@805 2961 let
adamc@805 2962 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2963 in
adamc@805 2964 case found (x', n1, k', NONE) of
adamc@805 2965 NONE => search dts
adamc@805 2966 | x => x
adamc@805 2967 end
adamc@191 2968 in
adamc@805 2969 search dts
adamc@191 2970 end
adamc@191 2971 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2972 let
adamc@191 2973 val k = (L'.KType, loc)
adamc@191 2974 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2975 in
adamc@191 2976 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2977 end
adamc@711 2978 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 2979 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 2980 | _ => NONE
adamc@31 2981 end)
adamc@31 2982
adamc@31 2983 | L'.SgiCon (x, n2, k2, c2) =>
adam@1591 2984 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 2985 let
adamc@211 2986 fun found (x', n1, k1, c1) =
adamc@211 2987 if x = x' then
adamc@211 2988 let
adamc@838 2989 val c2 = sub2 c2
adamc@838 2990
adamc@327 2991 fun good () =
adamc@327 2992 let
adamc@327 2993 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2994 val env = if n1 = n2 then
adamc@327 2995 env
adamc@327 2996 else
adamc@839 2997 (cparts (n2, n1);
adamc@839 2998 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 2999 in
adamc@628 3000 SOME env
adamc@327 3001 end
adamc@211 3002 in
adamc@987 3003 (unifyCons env loc c1 c2;
adamc@628 3004 good ())
adamc@211 3005 handle CUnify (c1, c2, err) =>
adam@1591 3006 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adamc@1000 3007 sgi2All, c2, err));
adamc@211 3008 good ())
adamc@211 3009 end
adamc@211 3010 else
adamc@211 3011 NONE
adamc@211 3012 in
adamc@211 3013 case sgi1 of
adamc@211 3014 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 3015 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3016 | _ => NONE
adamc@211 3017 end)
adamc@31 3018
adamc@805 3019 | L'.SgiDatatype dts2 =>
adamc@805 3020 let
adam@1591 3021 fun found' (sgi1All as (_, loc), (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 3022 if x1 <> x2 then
adamc@805 3023 NONE
adamc@805 3024 else
adamc@805 3025 let
adamc@805 3026 fun mismatched ue =
adam@1591 3027 (sgnError env (SgiMismatchedDatatypes (loc, sgi1All, sgi2All, ue));
adamc@805 3028 SOME env)
adamc@805 3029
adamc@805 3030 val k = (L'.KType, loc)
adamc@805 3031 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 3032
adamc@805 3033 fun good () =
adamc@805 3034 let
adamc@805 3035 val env = E.sgiBinds env sgi1All
adamc@805 3036 val env = if n1 = n2 then
adamc@805 3037 env
adamc@805 3038 else
adamc@838 3039 (cparts (n2, n1);
adamc@838 3040 E.pushCNamedAs env x1 n2 k'
adamc@838 3041 (SOME (L'.CNamed n1, loc)))
adamc@805 3042 in
adamc@805 3043 SOME env
adamc@805 3044 end
adamc@805 3045
adamc@805 3046 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 3047 val env = if n1 = n2 then
adamc@805 3048 env
adamc@805 3049 else
adamc@838 3050 (cparts (n2, n1);
adamc@838 3051 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 3052 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 3053 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 3054 String.compare (x1, x2) <> EQUAL
adamc@805 3055 orelse case (t1, t2) of
adamc@805 3056 (NONE, NONE) => false
adamc@805 3057 | (SOME t1, SOME t2) =>
adamc@987 3058 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 3059 | _ => true
adamc@805 3060 in
adamc@805 3061 (if xs1 <> xs2
adamc@805 3062 orelse length xncs1 <> length xncs2
adamc@805 3063 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 3064 mismatched NONE
adamc@160 3065 else
adamc@805 3066 good ())
adamc@805 3067 handle CUnify ue => mismatched (SOME ue)
adamc@805 3068 end
adamc@805 3069 in
adamc@805 3070 seek'
adamc@805 3071 (fn _ =>
adamc@805 3072 let
adamc@805 3073 fun seekOne (dt2, env) =
adamc@805 3074 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3075 case sgi1 of
adamc@805 3076 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 3077 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 3078 | _ => NONE)
adamc@805 3079
adamc@805 3080 fun seekAll (dts, env) =
adamc@805 3081 case dts of
adamc@805 3082 [] => env
adamc@805 3083 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 3084 in
adamc@805 3085 seekAll (dts2, env)
adamc@805 3086 end)
adamc@805 3087 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3088 let
adamc@805 3089 fun found dts1 =
adamc@805 3090 let
adamc@805 3091 fun iter (dts1, dts2, env) =
adamc@805 3092 case (dts1, dts2) of
adamc@805 3093 ([], []) => SOME env
adamc@805 3094 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 3095 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 3096 NONE => NONE
adamc@805 3097 | SOME env => iter (dts1, dts2, env))
adamc@805 3098 | _ => NONE
adamc@805 3099 in
adamc@805 3100 iter (dts1, dts2, env)
adamc@805 3101 end
adamc@805 3102 in
adamc@805 3103 case sgi1 of
adamc@805 3104 L'.SgiDatatype dts1 => found dts1
adamc@805 3105 | _ => NONE
adamc@805 3106 end)
adamc@805 3107 end
adamc@156 3108
adamc@191 3109 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adam@1591 3110 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@158 3111 case sgi1 of
adamc@191 3112 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 3113 if x = x' then
adamc@158 3114 let
adamc@158 3115 val k = (L'.KType, loc)
adamc@191 3116 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 3117 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 3118 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 3119
adamc@158 3120 fun good () =
adamc@158 3121 let
adamc@191 3122 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 3123 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 3124 in
adamc@838 3125 cparts (n2, n1);
adamc@628 3126 SOME env
adamc@158 3127 end
adamc@158 3128 in
adamc@987 3129 (unifyCons env loc t1 t2;
adamc@628 3130 good ())
adamc@158 3131 handle CUnify (c1, c2, err) =>
adam@1591 3132 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, err));
adamc@158 3133 good ())
adamc@158 3134 end
adamc@158 3135 else
adamc@158 3136 NONE
adamc@158 3137
adamc@158 3138 | _ => NONE)
adamc@156 3139
adamc@32 3140 | L'.SgiVal (x, n2, c2) =>
adam@1591 3141 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@32 3142 case sgi1 of
adamc@41 3143 L'.SgiVal (x', n1, c1) =>
adamc@41 3144 if x = x' then
adamc@838 3145 ((*prefaces "val" [("x", PD.string x),
adamc@838 3146 ("n1", PD.string (Int.toString n1)),
adamc@838 3147 ("c1", p_con env c1),
adamc@838 3148 ("c2", p_con env c2),
adamc@838 3149 ("c2'", p_con env (sub2 c2))];*)
adamc@987 3150 unifyCons env loc c1 (sub2 c2);
adamc@628 3151 SOME env)
adamc@86 3152 handle CUnify (c1, c2, err) =>
adam@1591 3153 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, err));
adamc@628 3154 SOME env)
adamc@41 3155 else
adamc@41 3156 NONE
adamc@32 3157 | _ => NONE)
adamc@32 3158
adamc@33 3159 | L'.SgiStr (x, n2, sgn2) =>
adam@1591 3160 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@33 3161 case sgi1 of
adamc@41 3162 L'.SgiStr (x', n1, sgn1) =>
adamc@41 3163 if x = x' then
adamc@66 3164 let
adam@1591 3165 val () = subSgn' counterparts env loc sgn1 sgn2
adamc@66 3166 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 3167 val env = if n1 = n2 then
adamc@66 3168 env
adamc@66 3169 else
adamc@66 3170 E.pushStrNamedAs env x n2
adamc@66 3171 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 3172 sgn = sgn2})
adamc@66 3173 in
adamc@628 3174 SOME env
adamc@66 3175 end
adamc@41 3176 else
adamc@41 3177 NONE
adamc@33 3178 | _ => NONE)
adamc@59 3179
adamc@59 3180 | L'.SgiSgn (x, n2, sgn2) =>
adam@1591 3181 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@59 3182 case sgi1 of
adamc@59 3183 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 3184 if x = x' then
adamc@65 3185 let
adam@1591 3186 val () = subSgn' counterparts env loc sgn1 sgn2
adam@1591 3187 val () = subSgn' counterparts env loc sgn2 sgn1
adamc@65 3188
adamc@65 3189 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 3190 val env = if n1 = n2 then
adamc@65 3191 env
adamc@65 3192 else
adamc@838 3193 (cparts (n2, n1);
adamc@838 3194 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 3195 in
adamc@628 3196 SOME env
adamc@65 3197 end
adamc@59 3198 else
adamc@59 3199 NONE
adamc@59 3200 | _ => NONE)
adamc@88 3201
adamc@88 3202 | L'.SgiConstraint (c2, d2) =>
adam@1591 3203 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@88 3204 case sgi1 of
adamc@88 3205 L'.SgiConstraint (c1, d1) =>
adamc@987 3206 if consEq env loc (c1, c2)
adamc@987 3207 andalso consEq env loc (d1, d2) then
adamc@628 3208 SOME env
adamc@88 3209 else
adamc@88 3210 NONE
adamc@88 3211 | _ => NONE)
adamc@203 3212
adamc@563 3213 | L'.SgiClassAbs (x, n2, k2) =>
adam@1591 3214 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3215 let
adamc@563 3216 fun found (x', n1, k1, co) =
adamc@211 3217 if x = x' then
adamc@211 3218 let
adamc@623 3219 val () = unifyKinds env k1 k2
adamc@563 3220 handle KUnify (k1, k2, err) =>
adam@1591 3221 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000 3222 sgi2All, k2, err))
adamc@563 3223
adamc@711 3224 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 3225 in
adamc@211 3226 SOME (if n1 = n2 then
adamc@211 3227 env
adamc@211 3228 else
adamc@838 3229 (cparts (n2, n1);
adamc@838 3230 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 3231 end
adamc@211 3232 else
adamc@211 3233 NONE
adamc@211 3234 in
adamc@211 3235 case sgi1 of
adamc@563 3236 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 3237 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 3238 | _ => NONE
adamc@211 3239 end)
adamc@563 3240 | L'.SgiClass (x, n2, k2, c2) =>
adam@1591 3241 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3242 let
adamc@563 3243 fun found (x', n1, k1, c1) =
adamc@211 3244 if x = x' then
adamc@211 3245 let
adamc@623 3246 val () = unifyKinds env k1 k2
adamc@563 3247 handle KUnify (k1, k2, err) =>
adam@1591 3248 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adamc@1000 3249 sgi2All, k2, err))
adamc@563 3250
adamc@838 3251 val c2 = sub2 c2
adamc@838 3252
adamc@218 3253 fun good () =
adamc@218 3254 let
adamc@711 3255 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 3256 val env = if n1 = n2 then
adamc@218 3257 env
adamc@218 3258 else
adamc@839 3259 (cparts (n2, n1);
adamc@839 3260 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 3261 in
adamc@628 3262 SOME env
adamc@218 3263 end
adamc@211 3264 in
adamc@987 3265 (unifyCons env loc c1 c2;
adamc@628 3266 good ())
adamc@211 3267 handle CUnify (c1, c2, err) =>
adam@1591 3268 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adamc@1000 3269 sgi2All, c2, err));
adamc@211 3270 good ())
adamc@211 3271 end
adamc@211 3272 else
adamc@211 3273 NONE
adamc@211 3274 in
adamc@211 3275 case sgi1 of
adamc@563 3276 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3277 | _ => NONE
adamc@211 3278 end)
adamc@31 3279 end
adamc@31 3280 in
adamc@628 3281 ignore (foldl folder env sgis2)
adamc@31 3282 end
adamc@31 3283
adamc@41 3284 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 3285 let
adamc@480 3286 val ran2 =
adamc@43 3287 if n1 = n2 then
adamc@480 3288 ran2
adamc@43 3289 else
adamc@480 3290 subStrInSgn (n2, n1) ran2
adamc@43 3291 in
adamc@1000 3292 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 3293 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 3294 end
adamc@41 3295
adamc@1000 3296 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 3297
adam@1580 3298 and subSgn env x y z = subSgn' (ref IM.empty) env x y z
adam@1580 3299 handle e as E.UnboundNamed _ => if ErrorMsg.anyErrors () then () else raise e
adamc@61 3300
adamc@706 3301 and positive self =
adamc@312 3302 let
adamc@312 3303 open L
adamc@312 3304
adamc@312 3305 fun none (c, _) =
adamc@312 3306 case c of
adamc@312 3307 CAnnot (c, _) => none c
adamc@312 3308
adamc@312 3309 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 3310 | TCFun (_, _, _, c) => none c
adamc@312 3311 | TRecord c => none c
adamc@312 3312
adamc@312 3313 | CVar ([], x) => x <> self
adamc@312 3314 | CVar _ => true
adamc@312 3315 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3316 | CAbs _ => false
adamc@628 3317 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3318
adamc@623 3319 | CKAbs _ => false
adamc@623 3320 | TKFun _ => false
adamc@623 3321
adamc@312 3322 | CName _ => true
adamc@312 3323
adamc@312 3324 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3325 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3326 | CMap => true
adamc@312 3327
adamc@312 3328 | CUnit => true
adamc@312 3329
adamc@312 3330 | CTuple cs => List.all none cs
adamc@312 3331 | CProj (c, _) => none c
adamc@312 3332
adamc@312 3333 | CWild _ => false
adamc@312 3334
adamc@312 3335 fun pos (c, _) =
adamc@312 3336 case c of
adamc@312 3337 CAnnot (c, _) => pos c
adamc@312 3338
adamc@312 3339 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3340 | TCFun (_, _, _, c) => pos c
adamc@312 3341 | TRecord c => pos c
adamc@312 3342
adamc@312 3343 | CVar _ => true
adamc@312 3344 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3345 | CAbs _ => false
adamc@628 3346 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3347
adamc@623 3348 | CKAbs _ => false
adamc@623 3349 | TKFun _ => false
adamc@623 3350
adamc@312 3351 | CName _ => true
adamc@312 3352
adamc@312 3353 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3354 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3355 | CMap => true
adamc@312 3356
adamc@312 3357 | CUnit => true
adamc@312 3358
adamc@312 3359 | CTuple cs => List.all pos cs
adamc@312 3360 | CProj (c, _) => pos c
adamc@312 3361
adamc@312 3362 | CWild _ => false
adamc@312 3363 in
adamc@312 3364 pos
adamc@312 3365 end
adamc@312 3366
adamc@706 3367 and wildifyStr env (str, sgn) =
adamc@325 3368 case #1 (hnormSgn env sgn) of
adamc@325 3369 L'.SgnConst sgis =>
adamc@325 3370 (case #1 str of
adamc@325 3371 L.StrConst ds =>
adamc@325 3372 let
adamc@1270 3373 fun cname d =
adamc@1270 3374 case d of
adamc@1270 3375 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270 3376 | L'.SgiConAbs (x, _, _) => SOME x
adamc@1270 3377 | L'.SgiClass (x, _, _, _) => SOME x
adamc@1270 3378 | L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270 3379 | _ => NONE
adamc@1270 3380
adamc@1270 3381 fun dname (d, _) =
adamc@1270 3382 case d of
adamc@1270 3383 L.DCon (x, _, _) => SOME x
adamc@1270 3384 | L.DClass (x, _, _) => SOME x
adamc@1270 3385 | _ => NONE
adamc@1270 3386
adamc@493 3387 fun decompileKind (k, loc) =
adamc@493 3388 case k of
adamc@493 3389 L'.KType => SOME (L.KType, loc)
adamc@493 3390 | L'.KArrow (k1, k2) =>
adamc@493 3391 (case (decompileKind k1, decompileKind k2) of
adamc@493 3392 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3393 | _ => NONE)
adamc@493 3394 | L'.KName => SOME (L.KName, loc)
adamc@493 3395 | L'.KRecord k =>
adamc@493 3396 (case decompileKind k of
adamc@493 3397 SOME k => SOME (L.KRecord k, loc)
adamc@493 3398 | _ => NONE)
adamc@493 3399 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3400 | L'.KTuple ks =>
adamc@493 3401 let
adamc@493 3402 val ks' = List.mapPartial decompileKind ks
adamc@493 3403 in
adamc@493 3404 if length ks' = length ks then
adamc@493 3405 SOME (L.KTuple ks', loc)
adamc@493 3406 else
adamc@493 3407 NONE
adamc@493 3408 end
adamc@493 3409
adamc@493 3410 | L'.KError => NONE
adamc@493 3411 | L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493 3412 | L'.KUnif _ => NONE
adam@1302 3413 | L'.KTupleUnif (_, _, ref (SOME k)) => decompileKind k
adam@1302 3414 | L'.KTupleUnif _ => NONE
adamc@493 3415
adamc@623 3416 | L'.KRel _ => NONE
adamc@623 3417 | L'.KFun _ => NONE
adamc@623 3418
adam@1529 3419 fun maybeHnorm env c =
adam@1529 3420 hnormCon env c
adam@1529 3421 handle E.UnboundNamed _ => c
adam@1529 3422
adam@1529 3423 fun decompileCon env (c as (_, loc)) =
adam@1529 3424 case #1 (maybeHnorm env c) of
adamc@325 3425 L'.CRel i =>
adamc@325 3426 let
adamc@325 3427 val (s, _) = E.lookupCRel env i
adamc@325 3428 in
adamc@325 3429 SOME (L.CVar ([], s), loc)
adamc@325 3430 end
adamc@325 3431 | L'.CNamed i =>
adamc@325 3432 let
adamc@325 3433 val (s, _, _) = E.lookupCNamed env i
adamc@325 3434 in
adamc@325 3435 SOME (L.CVar ([], s), loc)
adamc@325 3436 end
adamc@325 3437 | L'.CModProj (m1, ms, x) =>
adamc@325 3438 let
adamc@325 3439 val (s, _) = E.lookupStrNamed env m1
adamc@325 3440 in
adamc@325 3441 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3442 end
adamc@325 3443 | L'.CName s => SOME (L.CName s, loc)
adamc@325 3444 | L'.CRecord (_, xcs) =>
adamc@325 3445 let
adamc@325 3446 fun fields xcs =
adamc@325 3447 case xcs of
adamc@325 3448 [] => SOME []
adamc@325 3449 | (x, t) :: xcs =>
adamc@325 3450 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3451 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3452 | _ => NONE
adamc@325 3453 in
adamc@325 3454 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 3455 (fields xcs)
adamc@325 3456 end
adamc@325 3457 | L'.CConcat (c1, c2) =>
adamc@325 3458 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3459 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3460 | _ => NONE)
adamc@325 3461 | L'.CUnit => SOME (L.CUnit, loc)
adam@1303 3462 | L'.CUnif (nl, _, _, _, ref (SOME c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325 3463
adam@1585 3464 | L'.CApp (f, x) =>
adam@1585 3465 (case (decompileCon env f, decompileCon env x) of
adam@1585 3466 (SOME f, SOME x) => SOME (L.CApp (f, x), loc)
adam@1585 3467 | _ => NONE)
adam@1585 3468
adam@1585 3469 | c => (Print.preface ("WTF?", p_con env (c, loc)); NONE)
adamc@325 3470
adamc@1264 3471 fun buildNeeded env sgis =
adamc@1275 3472 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264 3473 (case sgi of
adam@1570 3474 L'.SgiCon (x, _, k, _) => naddCon (nd, x, k)
adam@1570 3475 | L'.SgiConAbs (x, _, k) => naddCon (nd, x, k)
adamc@1264 3476 | L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264 3477 | L'.SgiVal (x, _, t) =>
adamc@1264 3478 let
adamc@1277 3479 fun should t =
adamc@1277 3480 let
adamc@1277 3481 val t = normClassConstraint env' t
adamc@1277 3482 in
adamc@1277 3483 case #1 t of
adamc@1277 3484 L'.CApp (f, _) => isClassOrFolder env' f
adamc@1277 3485 | L'.TRecord t =>
adamc@1277 3486 (case hnormCon env' t of
adamc@1277 3487 (L'.CApp (f, _), _) =>
adamc@1277 3488 (case hnormCon env' f of
adamc@1277 3489 (L'.CApp (f, cl), loc) =>
adamc@1277 3490 (case hnormCon env' f of
adamc@1277 3491 (L'.CMap _, _) => isClassOrFolder env' cl
adamc@1277 3492 | _ => false)
adamc@1277 3493 | _ => false)
adamc@1277 3494 | _ => false)
adamc@1277 3495 | _ => false
adamc@1277 3496 end
adamc@1270 3497 in
adamc@1277 3498 if should t then
adamc@1277 3499 naddVal (nd, x)
adamc@1277 3500 else
adamc@1277 3501 nd
adamc@1264 3502 end
adamc@1264 3503 | L'.SgiStr (x, _, s) =>
adamc@1270 3504 (case #1 (hnormSgn env' s) of
adamc@1270 3505 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264 3506 | _ => nd)
adamc@1264 3507 | _ => nd,
adamc@1275 3508 E.sgiBinds env' (sgi, loc)))
adamc@1275 3509 (nempty, env) sgis)
adamc@1264 3510
adamc@1264 3511 val nd = buildNeeded env sgis
adamc@1264 3512
adamc@1264 3513 fun removeUsed (nd, ds) =
adamc@1264 3514 foldl (fn ((d, _), nd) =>
adamc@634 3515 case d of
adamc@1264 3516 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264 3517 | L.DClass (x, _, _) => ndelCon (nd, x)
adamc@1264 3518 | L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264 3519 | L.DOpen _ => nempty
adamc@1264 3520 | L.DStr (x, _, (L.StrConst ds', _)) =>
adamc@1264 3521 (case SM.find (nmods nd, x) of
adamc@1264 3522 NONE => nd
adamc@1270 3523 | SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264 3524 | _ => nd)
adamc@1264 3525 nd ds
adamc@1264 3526
adamc@1264 3527 val nd = removeUsed (nd, ds)
adamc@1264 3528
adamc@1270 3529 fun extend (env, nd, ds) =
adamc@1264 3530 let
adamc@1264 3531 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264 3532 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264 3533 (SOME c1, SOME c2) =>
adamc@1264 3534 SOME (L.DConstraint (c1, c2), loc)
adam@1586 3535 | _ => NONE) (nconstraints nd)
adamc@1264 3536
adamc@1264 3537 val ds' =
adamc@1264 3538 case SS.listItems (nvals nd) of
adamc@1264 3539 [] => ds'
adamc@1264 3540 | xs =>
adamc@1264 3541 let
adamc@1264 3542 val ewild = (L.EWild, #2 str)
adamc@1264 3543 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264 3544 in
adamc@1264 3545 ds'' @ ds'
adamc@1264 3546 end
adamc@1264 3547
adamc@1275 3548 val ds' =
adamc@1264 3549 case SM.listItemsi (ncons nd) of
adamc@1275 3550 [] => ds'
adamc@1264 3551 | xs =>
adam@1570 3552 map (fn (x, k) =>
adamc@1270 3553 let
adamc@1270 3554 val k =
adamc@1270 3555 case decompileKind k of
adamc@1270 3556 NONE => (L.KWild, #2 str)
adamc@1270 3557 | SOME k => k
adamc@1275 3558
adamc@1270 3559 val cwild = (L.CWild k, #2 str)
adamc@1270 3560 in
adam@1570 3561 (L.DCon (x, NONE, cwild), #2 str)
adamc@1275 3562 end) xs @ ds'
adamc@1275 3563
adamc@1275 3564 val ds = ds @ ds'
adamc@1264 3565 in
adamc@1270 3566 map (fn d as (L.DStr (x, s, (L.StrConst ds', loc')), loc) =>
adamc@1270 3567 (case SM.find (nmods nd, x) of
adamc@1270 3568 NONE => d
adamc@1270 3569 | SOME (env, nd') =>
adamc@1270 3570 (L.DStr (x, s, (L.StrConst (extend (env, nd', ds')), loc')), loc))
adamc@1270 3571 | d => d) ds
adamc@1264 3572 end
adamc@325 3573 in
adamc@1270 3574 (L.StrConst (extend (env, nd, ds)), #2 str)
adamc@325 3575 end
adamc@325 3576 | _ => str)
adamc@325 3577 | _ => str
adamc@325 3578
adamc@706 3579 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3580 let
adamc@904 3581 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3582 (*val befor = Time.now ()*)
adamc@255 3583
adamc@255 3584 val r =
adamc@255 3585 case d of
adamc@255 3586 L.DCon (x, ko, c) =>
adamc@255 3587 let
adamc@255 3588 val k' = case ko of
adamc@255 3589 NONE => kunif loc
adamc@623 3590 | SOME k => elabKind env k
adamc@255 3591
adamc@255 3592 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3593 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3594 in
adamc@255 3595 checkKind env c' ck k';
adamc@255 3596
adamc@255 3597 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3598 end
adamc@805 3599 | L.DDatatype dts =>
adamc@255 3600 let
adamc@255 3601 val k = (L'.KType, loc)
adamc@805 3602
adamc@805 3603 val (dts, env) = ListUtil.foldlMap
adamc@805 3604 (fn ((x, xs, xcs), env) =>
adamc@805 3605 let
adamc@805 3606 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3607 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3608 in
adamc@805 3609 ((x, n, xs, xcs), env)
adamc@805 3610 end)
adamc@805 3611 env dts
adamc@805 3612
adamc@805 3613 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3614 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3615 let
adamc@805 3616 val t = (L'.CNamed n, loc)
adamc@805 3617 val nxs = length xs - 1
adamc@805 3618 val t = ListUtil.foldli
adamc@805 3619 (fn (i, _, t) =>
adamc@805 3620 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3621
adamc@805 3622 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3623 (E.pushCRel env' x k,
adamc@805 3624 D.enter denv')) (env, denv) xs
adamc@805 3625
adamc@805 3626 val (xcs, (used, env, gs')) =
adamc@805 3627 ListUtil.foldlMap
adamc@805 3628 (fn ((x, to), (used, env, gs)) =>
adamc@805 3629 let
adamc@805 3630 val (to, t, gs') = case to of
adamc@805 3631 NONE => (NONE, t, gs)
adamc@805 3632 | SOME t' =>
adamc@805 3633 let
adamc@805 3634 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3635 in
adamc@805 3636 checkKind env' t' tk k;
adamc@805 3637 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3638 end
adamc@805 3639 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3640
adamc@805 3641 val (env, n') = E.pushENamed env x t
adamc@805 3642 in
adamc@805 3643 if SS.member (used, x) then
adamc@805 3644 strError env (DuplicateConstructor (x, loc))
adamc@805 3645 else
adamc@805 3646 ();
adamc@805 3647 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3648 end)
adamc@805 3649 (SS.empty, env, gs') xcs
adamc@805 3650 in
adamc@805 3651 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3652 end)
adamc@805 3653 (env, []) dts
adamc@255 3654 in
adamc@805 3655 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3656 end
adamc@255 3657
adamc@255 3658 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3659
adamc@255 3660 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3661 (case E.lookupStr env m1 of
adamc@255 3662 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3663 ([], (env, denv, gs)))
adamc@255 3664 | SOME (n, sgn) =>
adamc@255 3665 let
adamc@255 3666 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3667 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3668 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3669 (strerror, sgnerror))
adamc@255 3670 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3671 ((L'.StrVar n, loc), sgn) ms
adamc@255 3672 in
adamc@628 3673 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3674 (L'.CModProj (n, ms, s), _) =>
adamc@255 3675 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3676 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3677 ([], (env, denv, gs)))
adamc@255 3678 | SOME (xs, xncs) =>
adamc@255 3679 let
adamc@255 3680 val k = (L'.KType, loc)
adamc@255 3681 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3682 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3683 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3684 val env = E.pushDatatype env n' xs xncs
adamc@255 3685
adamc@255 3686 val t = (L'.CNamed n', loc)
adamc@844 3687 val nxs = length xs
adamc@844 3688 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3689 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3690 t xs
adamc@255 3691 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3692 let
adamc@255 3693 val t = case to of
adamc@255 3694 NONE => t
adamc@255 3695 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3696
adamc@255 3697 val t = foldr (fn (x, t) =>
adamc@255 3698 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3699 t xs
adamc@255 3700 in
adamc@255 3701 E.pushENamedAs env x n t
adamc@255 3702 end) env xncs
adamc@255 3703 in
adamc@628 3704 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3705 end)
adamc@255 3706 | _ => (strError env (NotDatatype loc);
adamc@255 3707 ([], (env, denv, [])))
adamc@255 3708 end)
adamc@255 3709
adamc@255 3710 | L.DVal (x, co, e) =>
adamc@255 3711 let
adamc@255 3712 val (c', _, gs1) = case co of
adamc@255 3713 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3714 | SOME c => elabCon (env, denv) c
adamc@255 3715
adamc@255 3716 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3717
adamc@629 3718 val () = checkCon env e' et c'
adamc@629 3719
adamc@674 3720 val c' = normClassConstraint env c'
adamc@255 3721 val (env', n) = E.pushENamed env x c'
adamc@255 3722 in
adamc@255 3723 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3724 ("c'", p_con env c')];*)
adamc@628 3725 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3726 end
adamc@255 3727 | L.DValRec vis =>
adamc@255 3728 let
adamc@255 3729 fun allowable (e, _) =
adamc@255 3730 case e of
adamc@255 3731 L.EAbs _ => true
adamc@255 3732 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3733 | L.EKAbs (_, e) => allowable e
adamc@255 3734 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3735 | _ => false
adamc@255 3736
adamc@255 3737 val (vis, gs) = ListUtil.foldlMap
adamc@255 3738 (fn ((x, co, e), gs) =>
adamc@255 3739 let
adamc@255 3740 val (c', _, gs1) = case co of
adamc@255 3741 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3742 | SOME c => elabCon (env, denv) c
adamc@674 3743 val c' = normClassConstraint env c'
adamc@255 3744 in
adamc@255 3745 ((x, c', e), enD gs1 @ gs)
adamc@280 3746 end) gs vis
adamc@255 3747
adamc@255 3748 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3749 let
adamc@255 3750 val (env, n) = E.pushENamed env x c'
adamc@255 3751 in
adamc@255 3752 ((x, n, c', e), env)
adamc@255 3753 end) env vis
adamc@255 3754
adamc@255 3755 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3756 let
adamc@255 3757 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3758 in
adamc@628 3759 checkCon env e' et c';
adamc@255 3760 if allowable e then
adamc@255 3761 ()
adamc@255 3762 else
adamc@255 3763 expError env (IllegalRec (x, e'));
adamc@628 3764 ((x, n, c', e'), gs1 @ gs)
adamc@255 3765 end) gs vis
adamc@255 3766 in
adamc@255 3767 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 3768 end
adamc@255 3769
adamc@255 3770 | L.DSgn (x, sgn) =>
adamc@255 3771 let
adamc@255 3772 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3773 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3774 in
adamc@255 3775 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3776 end
adamc@255 3777
adamc@255 3778 | L.DStr (x, sgno, str) =>
adamc@255 3779 let
adamc@255 3780 val () = if x = "Basis" then
adamc@255 3781 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3782 else
adamc@255 3783 ()
adamc@255 3784
adamc@255 3785 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3786
adamc@255 3787 val (str', sgn', gs') =
adamc@255 3788 case formal of
adamc@255 3789 NONE =>
adamc@255 3790 let
adamc@255 3791 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3792 in
adamc@255 3793 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3794 end
adamc@255 3795 | SOME (formal, gs1) =>
adamc@255 3796 let
adamc@325 3797 val str = wildifyStr env (str, formal)
adamc@255 3798 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3799 in
adamc@1000 3800 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3801 (str', formal, enD gs1 @ gs2)
adamc@255 3802 end
adamc@255 3803
adamc@255 3804 val (env', n) = E.pushStrNamed env x sgn'
adamc@834 3805 val denv' =
adamc@834 3806 case #1 str' of
adamc@834 3807 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022 3808 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834 3809 | _ => denv
adamc@255 3810 in
adamc@255 3811 case #1 (hnormSgn env sgn') of
adamc@255 3812 L'.SgnFun _ =>
adamc@255 3813 (case #1 str' of
adamc@255 3814 L'.StrFun _ => ()
adamc@255 3815 | _ => strError env (FunctorRebind loc))
adamc@255 3816 | _ => ();
adamc@834 3817 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255 3818 end
adamc@255 3819
adamc@255 3820 | L.DFfiStr (x, sgn) =>
adamc@255 3821 let
adamc@255 3822 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3823
adamc@255 3824 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3825 in
adamc@255 3826 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3827 end
adamc@255 3828
adamc@255 3829 | L.DOpen (m, ms) =>
adamc@255 3830 (case E.lookupStr env m of
adamc@255 3831 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3832 ([], (env, denv, gs)))
adamc@255 3833 | SOME (n, sgn) =>
adamc@255 3834 let
adamc@1030 3835 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 3836 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 3837 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 3838 (strerror, sgnerror))
adamc@1030 3839 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 3840 ((L'.StrVar n, loc), sgn) ms
adamc@1030 3841
adamc@1030 3842 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 3843
adamc@628 3844 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 3845 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 3846 in
adamc@255 3847 (ds, (env', denv', gs))
adamc@255 3848 end)
adamc@255 3849
adamc@255 3850 | L.DConstraint (c1, c2) =>
adamc@255 3851 let
adamc@255 3852 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3853 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3854 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3855
adamc@628 3856 val denv' = D.assert env denv (c1', c2')
adamc@255 3857 in
adamc@255 3858 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3859 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3860
adamc@628 3861 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 3862 end
adamc@255 3863
adamc@255 3864 | L.DOpenConstraints (m, ms) =>
adamc@255 3865 let
adamc@255 3866 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3867 in
adamc@255 3868 ([], (env, denv, gs))
adamc@255 3869 end
adamc@255 3870
adamc@255 3871 | L.DExport str =>
adamc@255 3872 let
adamc@255 3873 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3874
adamc@255 3875 val sgn =
adamc@255 3876 case #1 (hnormSgn env sgn) of
adamc@255 3877 L'.SgnConst sgis =>
adamc@255 3878 let
adamc@255 3879 fun doOne (all as (sgi, _), env) =
adamc@255 3880 (case sgi of
adamc@255 3881 L'.SgiVal (x, n, t) =>
adamc@325 3882 let
adamc@325 3883 fun doPage (makeRes, ran) =
adamc@628 3884 case hnormCon env ran of
adamc@628 3885 (L'.CApp (tf, arg), _) =>
adamc@628 3886 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 3887 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 3888 (L'.CApp (tf, arg3), _)) =>
adamc@325 3889 (case (basis = !basis_r,
adamc@720 3890 hnormCon env tf, hnormCon env arg3) of
adamc@325 3891 (true,
adamc@720 3892 (L'.CApp (tf, arg2), _),
adamc@628 3893 ((L'.CRecord (_, []), _))) =>
adamc@720 3894 (case (hnormCon env tf) of
adamc@720 3895 (L'.CApp (tf, arg1), _) =>
adamc@720 3896 (case (hnormCon env tf,
adamc@720 3897 hnormCon env arg1,
adamc@720 3898 hnormCon env arg2) of
adamc@720 3899 (tf, arg1,
adamc@720 3900 (L'.CRecord (_, []), _)) =>
adamc@720 3901 let
adamc@720 3902 val t = (L'.CApp (tf, arg1), loc)
adamc@720 3903 val t = (L'.CApp (t, arg2), loc)
adamc@720 3904 val t = (L'.CApp (t, arg3), loc)
adamc@720 3905 val t = (L'.CApp (
adamc@720 3906 (L'.CModProj
adamc@720 3907 (basis, [], "transaction"), loc),
adamc@325 3908 t), loc)
adam@1347 3909
adam@1347 3910 fun normArgs t =
adam@1347 3911 case hnormCon env t of
adam@1347 3912 (L'.TFun (dom, ran), loc) =>
adam@1347 3913 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347 3914 | t' => t'
adamc@720 3915 in
adam@1347 3916 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720 3917 end
adamc@325 3918 | _ => all)
adamc@325 3919 | _ => all)
adamc@325 3920 | _ => all)
adamc@325 3921 | _ => all)
adamc@325 3922 | _ => all
adamc@325 3923 in
adamc@628 3924 case hnormCon env t of
adamc@628 3925 (L'.TFun (dom, ran), _) =>
adamc@628 3926 (case hnormCon env dom of
adamc@628 3927 (L'.TRecord domR, _) =>
adamc@325 3928 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3929 loc),
adamc@325 3930 t), loc), ran)
adamc@325 3931 | _ => all)
adamc@325 3932 | _ => doPage (fn t => t, t)
adamc@325 3933 end
adamc@255 3934 | _ => all,
adamc@255 3935 E.sgiBinds env all)
adamc@255 3936 in
adamc@255 3937 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3938 end
adamc@255 3939 | _ => sgn
adamc@255 3940 in
adamc@255 3941 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3942 end
adamc@255 3943
adamc@707 3944 | L.DTable (x, c, pe, ce) =>
adamc@255 3945 let
adamc@707 3946 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 3947
adamc@255 3948 val (c', k, gs') = elabCon (env, denv) c
adamc@707 3949 val pkey = cunif (loc, cstK)
adamc@707 3950 val uniques = cunif (loc, cstK)
adamc@705 3951
adamc@705 3952 val ct = tableOf ()
adamc@705 3953 val ct = (L'.CApp (ct, c'), loc)
adamc@707 3954 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 3955
adamc@705 3956 val (env, n) = E.pushENamed env x ct
adamc@707 3957 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 3958 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 3959
adamc@707 3960 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 3961 val pst = (L'.CApp (pst, c'), loc)
adamc@707 3962 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 3963
adamc@704 3964 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 3965 val cst = (L'.CApp (cst, c'), loc)
adamc@705 3966 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 3967 in
adamc@255 3968 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 3969 checkCon env pe' pet pst;
adamc@707 3970 checkCon env ce' cet cst;
adamc@707 3971 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 3972 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 3973 end
adamc@338 3974 | L.DSequence x =>
adamc@338 3975 let
adamc@338 3976 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3977 in
adamc@338 3978 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3979 end
adamc@754 3980 | L.DView (x, e) =>
adamc@754 3981 let
adamc@754 3982 val (e', t, gs') = elabExp (env, denv) e
adamc@754 3983
adamc@754 3984 val k = (L'.KRecord (L'.KType, loc), loc)
adamc@754 3985 val fs = cunif (loc, k)
adamc@754 3986 val ts = cunif (loc, (L'.KRecord k, loc))
adamc@754 3987 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 3988 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 3989 val ts = (L'.CApp (tf, ts), loc)
adamc@754 3990
adamc@754 3991 val cv = viewOf ()
adamc@754 3992 val cv = (L'.CApp (cv, fs), loc)
adamc@754 3993 val (env', n) = E.pushENamed env x cv
adamc@754 3994
adamc@754 3995 val ct = queryOf ()
adamc@1191 3996 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395 3997 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754 3998 val ct = (L'.CApp (ct, ts), loc)
adamc@754 3999 val ct = (L'.CApp (ct, fs), loc)
adamc@754 4000 in
adamc@754 4001 checkCon env e' t ct;
adamc@754 4002 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 4003 (env', denv, gs' @ gs))
adamc@754 4004 end
adamc@255 4005
adamc@563 4006 | L.DClass (x, k, c) =>
adamc@255 4007 let
adamc@623 4008 val k = elabKind env k
adamc@280 4009 val (c', ck, gs') = elabCon (env, denv) c
adamc@711 4010 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 4011 val env = E.pushClass env n
adamc@255 4012 in
adamc@711 4013 checkKind env c' ck k;
adamc@563 4014 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 4015 end
adamc@271 4016
adamc@280 4017 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 4018
adamc@459 4019 | L.DCookie (x, c) =>
adamc@459 4020 let
adamc@459 4021 val (c', k, gs') = elabCon (env, denv) c
adamc@459 4022 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 4023 in
adamc@459 4024 checkKind env c' k (L'.KType, loc);
adamc@459 4025 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 4026 end
adamc@720 4027 | L.DStyle x =>
adamc@718 4028 let
adamc@720 4029 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 4030 in
adamc@720 4031 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 4032 end
adamc@1075 4033 | L.DTask (e1, e2) =>
adamc@1073 4034 let
adamc@1075 4035 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075 4036 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075 4037
adam@1348 4038 val targ = cunif (loc, (L'.KType, loc))
adam@1348 4039
adamc@1075 4040 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348 4041 val t1' = (L'.CApp (t1', targ), loc)
adam@1348 4042
adamc@1075 4043 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075 4044 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348 4045 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073 4046 in
adamc@1075 4047 checkCon env e1' t1 t1';
adamc@1075 4048 checkCon env e2' t2 t2';
adamc@1075 4049 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073 4050 end
adamc@1199 4051 | L.DPolicy e1 =>
adamc@1199 4052 let
adamc@1199 4053 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199 4054
adamc@1199 4055 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199 4056 in
adamc@1199 4057 checkCon env e1' t1 t1';
adamc@1199 4058 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199 4059 end
adamc@459 4060
adam@1294 4061 | L.DOnError (m1, ms, s) =>
adam@1294 4062 (case E.lookupStr env m1 of
adam@1294 4063 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294 4064 ([], (env, denv, [])))
adam@1294 4065 | SOME (n, sgn) =>
adam@1294 4066 let
adam@1294 4067 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294 4068 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294 4069 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294 4070 (strerror, sgnerror))
adam@1294 4071 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294 4072 ((L'.StrVar n, loc), sgn) ms
adam@1294 4073
adam@1294 4074 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294 4075 NONE => (expError env (UnboundExp (loc, s));
adam@1294 4076 cerror)
adam@1294 4077 | SOME t => t
adam@1294 4078
adam@1294 4079 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294 4080 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294 4081 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294 4082 in
adam@1407 4083 (unifyCons env loc t func
adam@1407 4084 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294 4085 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294 4086 end)
adam@1294 4087
adamc@280 4088 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 4089 in
adamc@904 4090 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];*)
adamc@255 4091 r
adamc@255 4092 end
adamc@211 4093
adamc@83 4094 and elabStr (env, denv) (str, loc) =
adamc@31 4095 case str of
adamc@31 4096 L.StrConst ds =>
adamc@31 4097 let
adamc@88 4098 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 4099 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 4100
adamc@63 4101 val (sgis, _, _, _, _) =
adamc@64 4102 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 4103 case sgi of
adamc@64 4104 L'.SgiConAbs (x, n, k) =>
adamc@64 4105 let
adamc@64 4106 val (cons, x) =
adamc@64 4107 if SS.member (cons, x) then
adamc@64 4108 (cons, "?" ^ x)
adamc@64 4109 else
adamc@64 4110 (SS.add (cons, x), x)
adamc@64 4111 in
adamc@64 4112 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4113 end
adamc@64 4114 | L'.SgiCon (x, n, k, c) =>
adamc@64 4115 let
adamc@64 4116 val (cons, x) =
adamc@64 4117 if SS.member (cons, x) then
adamc@64 4118 (cons, "?" ^ x)
adamc@64 4119 else
adamc@64 4120 (SS.add (cons, x), x)
adamc@64 4121 in
adamc@64 4122 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4123 end
adamc@805 4124 | L'.SgiDatatype dts =>
adamc@156 4125 let
adamc@805 4126 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 4127 let
adamc@805 4128 val (cons, x) =
adamc@805 4129 if SS.member (cons, x) then
adamc@805 4130 (cons, "?" ^ x)
adamc@156 4131 else
adamc@805 4132 (SS.add (cons, x), x)
adamc@805 4133
adamc@805 4134 val (xncs, vals) =
adamc@805 4135 ListUtil.foldlMap
adamc@805 4136 (fn ((x, n, t), vals) =>
adamc@805 4137 if SS.member (vals, x) then
adamc@805 4138 (("?" ^ x, n, t), vals)
adamc@805 4139 else
adamc@805 4140 ((x, n, t), SS.add (vals, x)))
adamc@805 4141 vals xncs
adamc@805 4142 in
adamc@805 4143 ((x, n, xs, xncs), (cons, vals))
adamc@805 4144 end
adamc@805 4145
adamc@805 4146 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 4147 in
adamc@805 4148 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4149 end
adamc@191 4150 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 4151 let
adamc@156 4152 val (cons, x) =
adamc@156 4153 if SS.member (cons, x) then
adamc@156 4154 (cons, "?" ^ x)
adamc@156 4155 else
adamc@156 4156 (SS.add (cons, x), x)
adamc@156 4157 in
adamc@191 4158 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4159 end
adamc@64 4160 | L'.SgiVal (x, n, c) =>
adamc@64 4161 let
adamc@64 4162 val (vals, x) =
adamc@64 4163 if SS.member (vals, x) then
adamc@64 4164 (vals, "?" ^ x)
adamc@64 4165 else
adamc@64 4166 (SS.add (vals, x), x)
adamc@64 4167 in
adamc@64 4168 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4169 end
adamc@64 4170 | L'.SgiSgn (x, n, sgn) =>
adamc@64 4171 let
adamc@64 4172 val (sgns, x) =
adamc@64 4173 if SS.member (sgns, x) then
adamc@64 4174 (sgns, "?" ^ x)
adamc@64 4175 else
adamc@64 4176 (SS.add (sgns, x), x)
adamc@64 4177 in
adamc@64 4178 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4179 end
adamc@64 4180
adamc@64 4181 | L'.SgiStr (x, n, sgn) =>
adamc@64 4182 let
adamc@64 4183 val (strs, x) =
adamc@64 4184 if SS.member (strs, x) then
adamc@64 4185 (strs, "?" ^ x)
adamc@64 4186 else
adamc@64 4187 (SS.add (strs, x), x)
adamc@64 4188 in
adamc@64 4189 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 4190 end
adamc@203 4191 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 4192 | L'.SgiClassAbs (x, n, k) =>
adamc@211 4193 let
adamc@211 4194 val (cons, x) =
adamc@211 4195 if SS.member (cons, x) then
adamc@211 4196 (cons, "?" ^ x)
adamc@211 4197 else
adamc@211 4198 (SS.add (cons, x), x)
adamc@211 4199 in
adamc@563 4200 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 4201 end
adamc@563 4202 | L'.SgiClass (x, n, k, c) =>
adamc@211 4203 let
adamc@211 4204 val (cons, x) =
adamc@211 4205 if SS.member (cons, x) then
adamc@211 4206 (cons, "?" ^ x)
adamc@211 4207 else
adamc@211 4208 (SS.add (cons, x), x)
adamc@211 4209 in
adamc@563 4210 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 4211 end)
adamc@64 4212
adamc@63 4213 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 4214 in
adamc@83 4215 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 4216 end
adamc@31 4217 | L.StrVar x =>
adamc@31 4218 (case E.lookupStr env x of
adamc@31 4219 NONE =>
adamc@31 4220 (strError env (UnboundStr (loc, x));
adamc@83 4221 (strerror, sgnerror, []))
adamc@83 4222 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 4223 | L.StrProj (str, x) =>
adamc@34 4224 let
adamc@83 4225 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 4226 in
adamc@34 4227 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 4228 NONE => (strError env (UnboundStr (loc, x));
adamc@83 4229 (strerror, sgnerror, []))
adamc@83 4230 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 4231 end
adamc@41 4232 | L.StrFun (m, dom, ranO, str) =>
adamc@41 4233 let
adamc@83 4234 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 4235 val (env', n) = E.pushStrNamed env m dom'
adamc@834 4236 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 4237 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 4238
adamc@83 4239 val (formal, gs3) =
adamc@41 4240 case ranO of
adamc@83 4241 NONE => (actual, [])
adamc@41 4242 | SOME ran =>
adamc@41 4243 let
adamc@834 4244 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 4245 in
adamc@1000 4246 subSgn env' loc actual ran';
adamc@83 4247 (ran', gs)
adamc@41 4248 end
adamc@41 4249 in
adamc@41 4250 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 4251 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 4252 enD gs1 @ gs2 @ enD gs3)
adamc@41 4253 end
adamc@44 4254 | L.StrApp (str1, str2) =>
adamc@44 4255 let
adamc@83 4256 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 4257 val str2 =
adamc@325 4258 case sgn1 of
adamc@325 4259 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275 4260 let
adamc@1275 4261 val s = wildifyStr env (str2, dom)
adamc@1275 4262 in
adamc@1275 4263 (*Print.preface ("Wild", SourcePrint.p_str s);*)
adamc@1275 4264 s
adamc@1275 4265 end
adamc@325 4266 | _ => str2
adamc@83 4267 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270 4268 in
adamc@44 4269 case #1 (hnormSgn env sgn1) of
adamc@83 4270 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4271 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 4272 (subSgn env loc sgn2 dom;
adamc@44 4273 case #1 (hnormSgn env ran) of
adamc@83 4274 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4275 | L'.SgnConst sgis =>
adamc@44 4276 ((L'.StrApp (str1', str2'), loc),
adamc@83 4277 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 4278 gs1 @ gs2)
adamc@44 4279 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 4280 | _ => (strError env (NotFunctor sgn1);
adamc@83 4281 (strerror, sgnerror, []))
adamc@44 4282 end
adamc@31 4283
adamc@987 4284 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 4285
adamc@325 4286 fun elabFile basis topStr topSgn env file =
adamc@56 4287 let
adamc@713 4288 val () = mayDelay := true
adamc@713 4289 val () = delayedUnifs := []
adamc@830 4290 val () = delayedExhaustives := []
adamc@713 4291
adamc@83 4292 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 4293 val () = case gs of
adamc@83 4294 [] => ()
adamc@207 4295 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 4296 prefaces "Unresolved"
adamc@207 4297 [("c1", p_con env c1),
adamc@207 4298 ("c2", p_con env c2)]) gs;
adamc@207 4299 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 4300
adamc@56 4301 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 4302 val () = basis_r := basis_n
adamc@56 4303
adamc@628 4304 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 4305
adamc@56 4306 fun discoverC r x =
adamc@56 4307 case E.lookupC env' x of
adamc@56 4308 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 4309 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 4310 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 4311
adamc@56 4312 val () = discoverC int "int"
adamc@56 4313 val () = discoverC float "float"
adamc@56 4314 val () = discoverC string "string"
adamc@821 4315 val () = discoverC char "char"
adamc@203 4316 val () = discoverC table "sql_table"
adamc@56 4317
adamc@325 4318 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 4319 val () = case gs of
adamc@325 4320 [] => ()
adamc@325 4321 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 4322 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 4323 val () = case gs of
adamc@325 4324 [] => ()
adamc@329 4325 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 4326 (case D.prove env denv (c1, c2, loc) of
adamc@329 4327 [] => ()
adamc@329 4328 | _ =>
adamc@329 4329 (prefaces "Unresolved constraint in top.ur"
adamc@329 4330 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 4331 ("c1", p_con env c1),
adamc@720 4332 ("c2", p_con env c2)];
adamc@478 4333 raise Fail "Unresolved constraint in top.ur"))
adamc@564 4334 | TypeClass (env, c, r, loc) =>
adamc@564 4335 let
adamc@564 4336 val c = normClassKey env c
adamc@564 4337 in
adamc@833 4338 case resolveClass env c of
adamc@564 4339 SOME e => r := SOME e
adamc@564 4340 | NONE => expError env (Unresolvable (loc, c))
adamc@634 4341 end) gs
adamc@564 4342
adamc@1000 4343 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720 4344
adamc@325 4345 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633 4346 val () = top_r := top_n
adamc@325 4347
adamc@628 4348 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 4349
adamc@83 4350 fun elabDecl' (d, (env, gs)) =
adamc@76 4351 let
adamc@76 4352 val () = resetKunif ()
adamc@76 4353 val () = resetCunif ()
adam@1345 4354 val (ds, (env', _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 4355 in
adam@1345 4356 (**)
adam@1345 4357 (ds, (env', gs))
adamc@76 4358 end
adamc@76 4359
adam@1345 4360 val (file, (env'', gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753 4361
adamc@777 4362 fun oneSummaryRound () =
adamc@777 4363 if ErrorMsg.anyErrors () then
adamc@777 4364 ()
adamc@777 4365 else
adamc@777 4366 let
adamc@777 4367 val delayed = !delayedUnifs
adamc@777 4368 in
adamc@777 4369 delayedUnifs := [];
adamc@777 4370 app (fn (loc, env, k, s1, s2) =>
adamc@777 4371 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 4372 delayed
adamc@777 4373 end
adam@1576 4374
adam@1576 4375 val checkConstraintErrors = ref (fn () => ())
adamc@56 4376 in
adamc@777 4377 oneSummaryRound ();
adamc@753 4378
adamc@753 4379 if ErrorMsg.anyErrors () then
adamc@753 4380 ()
adamc@753 4381 else
adamc@753 4382 let
adamc@753 4383 fun solver gs =
adamc@753 4384 let
adamc@753 4385 val (gs, solved) =
adamc@753 4386 ListUtil.foldlMapPartial
adamc@753 4387 (fn (g, solved) =>
adamc@753 4388 case g of
adamc@753 4389 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 4390 (case D.prove env denv (c1, c2, loc) of
adamc@753 4391 [] => (NONE, true)
adamc@753 4392 | _ => (SOME g, solved))
adamc@753 4393 | TypeClass (env, c, r, loc) =>
adamc@753 4394 let
adamc@753 4395 fun default () = (SOME g, solved)
adamc@753 4396
adamc@753 4397 val c = normClassKey env c
adamc@753 4398 in
adamc@833 4399 case resolveClass env c of
adamc@753 4400 SOME e => (r := SOME e;
adamc@753 4401 (NONE, true))
adamc@753 4402 | NONE =>
adamc@753 4403 case #1 (hnormCon env c) of
adamc@753 4404 L'.CApp (f, x) =>
adamc@753 4405 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753 4406 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753 4407 (case #1 (hnormCon env f) of
adamc@753 4408 L'.CModProj (top_n', [], "folder") =>
adamc@753 4409 if top_n' = top_n then
adamc@753 4410 let
adamc@753 4411 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753 4412 val e = (L'.EKApp (e, k), loc)
adamc@753 4413
adamc@753 4414 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753 4415 let
adamc@753 4416 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753 4417 "cons"), loc)
adamc@753 4418 val e = (L'.EKApp (e, k), loc)
adamc@753 4419 val e = (L'.ECApp (e,
adamc@753 4420 (L'.CRecord (k, xcs),
adamc@753 4421 loc)), loc)
adamc@753 4422 val e = (L'.ECApp (e, x), loc)
adamc@753 4423 val e = (L'.ECApp (e, c), loc)
adamc@753 4424 val e = (L'.EApp (e, folder), loc)
adamc@753 4425 in
adamc@753 4426 (e, (x, c) :: xcs)
adamc@753 4427 end)
adamc@753 4428 (e, []) xcs
adamc@753 4429 in
adamc@753 4430 (r := SOME folder;
adamc@753 4431 (NONE, true))
adamc@753 4432 end
adamc@753 4433 else
adamc@753 4434 default ()
adamc@753 4435 | _ => default ())
adamc@753 4436 | _ => default ())
adamc@753 4437 | _ => default ()
adamc@753 4438 end)
adamc@753 4439 false gs
adamc@753 4440 in
adamc@753 4441 case (gs, solved) of
adamc@753 4442 ([], _) => ()
adamc@777 4443 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4444 | _ =>
adam@1576 4445 checkConstraintErrors :=
adam@1576 4446 (fn () => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1576 4447 let
adam@1576 4448 val c1' = ElabOps.hnormCon env c1
adam@1576 4449 val c2' = ElabOps.hnormCon env c2
adam@1576 4450
adam@1576 4451 fun isUnif (c, _) =
adam@1576 4452 case c of
adam@1576 4453 L'.CUnif _ => true
adam@1576 4454 | _ => false
adam@1576 4455
adam@1576 4456 fun maybeAttr (c, _) =
adam@1576 4457 case c of
adam@1576 4458 L'.CRecord ((L'.KType, _), xts) => true
adam@1576 4459 | _ => false
adam@1576 4460 in
adam@1576 4461 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adam@1576 4462 eprefaces' [("Con 1", p_con env c1),
adam@1576 4463 ("Con 2", p_con env c2),
adam@1576 4464 ("Hnormed 1", p_con env c1'),
adam@1576 4465 ("Hnormed 2", p_con env c2')]
adam@1576 4466
adam@1576 4467 (*app (fn (loc, env, k, s1, s2) =>
adam@1576 4468 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1576 4469 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1576 4470 (!delayedUnifs);*)
adam@1576 4471 end
adam@1576 4472 | TypeClass (env, c, r, loc) =>
adam@1576 4473 expError env (Unresolvable (loc, c)))
adam@1576 4474 gs)
adamc@753 4475 end
adamc@753 4476 in
adamc@753 4477 solver gs
adamc@753 4478 end;
adamc@753 4479
adamc@713 4480 mayDelay := false;
adamc@713 4481
adamc@777 4482 if ErrorMsg.anyErrors () then
adamc@777 4483 ()
adamc@777 4484 else
adamc@777 4485 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4486 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777 4487 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adam@1582 4488 cunifyError env err;
adam@1582 4489 case !reducedSummaries of
adam@1582 4490 NONE => ()
adam@1582 4491 | SOME (s1, s2) =>
adam@1582 4492 (ErrorMsg.errorAt loc "Stuck unifying these records after canceling matching pieces:";
adam@1582 4493 eprefaces' [("Have", s1),
adam@1582 4494 ("Need", s2)])))
adamc@777 4495 (!delayedUnifs);
adamc@777 4496 delayedUnifs := []);
adamc@713 4497
adam@1346 4498 if ErrorMsg.anyErrors () then
adam@1346 4499 ()
adam@1346 4500 else
adam@1584 4501 if List.exists kunifsInDecl file then
adam@1584 4502 case U.File.findDecl kunifsInDecl file of
adam@1584 4503 NONE => ()
adam@1584 4504 | SOME d => declError env'' (KunifsRemain [d])
adam@1584 4505 else
adam@1584 4506 ();
adam@1345 4507
adam@1346 4508 if ErrorMsg.anyErrors () then
adam@1346 4509 ()
adam@1346 4510 else
adam@1584 4511 if List.exists cunifsInDecl file then
adam@1584 4512 case U.File.findDecl cunifsInDecl file of
adam@1584 4513 NONE => ()
adam@1584 4514 | SOME d => declError env'' (CunifsRemain [d])
adam@1584 4515 else
adam@1584 4516 ();
adamc@750 4517
adamc@830 4518 if ErrorMsg.anyErrors () then
adamc@830 4519 ()
adamc@830 4520 else
adamc@837 4521 app (fn all as (env, _, _, loc) =>
adamc@830 4522 case exhaustive all of
adamc@830 4523 NONE => ()
adamc@830 4524 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4525 (!delayedExhaustives);
adamc@830 4526
adam@1576 4527 if ErrorMsg.anyErrors () then
adam@1576 4528 ()
adam@1576 4529 else
adam@1576 4530 !checkConstraintErrors ();
adam@1576 4531
adamc@799 4532 (*preface ("file", p_file env' file);*)
adam@1531 4533
adam@1531 4534 if !dumpTypes then
adam@1531 4535 let
adam@1531 4536 open L'
adam@1531 4537 open Print.PD
adam@1531 4538 open Print
adam@1531 4539
adam@1531 4540 fun dumpDecl (d, env) =
adam@1531 4541 case #1 d of
adam@1531 4542 DCon (x, _, k, _) => (print (box [string x,
adam@1531 4543 space,
adam@1531 4544 string "::",
adam@1531 4545 space,
adam@1531 4546 p_kind env k,
adam@1531 4547 newline,
adam@1531 4548 newline]);
adam@1531 4549 E.declBinds env d)
adam@1531 4550 | DVal (x, _, t, _) => (print (box [string x,
adam@1531 4551 space,
adam@1531 4552 string ":",
adam@1531 4553 space,
adam@1531 4554 p_con env t,
adam@1531 4555 newline,
adam@1531 4556 newline]);
adam@1531 4557 E.declBinds env d)
adam@1531 4558 | DValRec vis => (app (fn (x, _, t, _) => print (box [string x,
adam@1531 4559 space,
adam@1531 4560 string ":",
adam@1531 4561 space,
adam@1531 4562 p_con env t,
adam@1531 4563 newline,
adam@1531 4564 newline])) vis;
adam@1531 4565 E.declBinds env d)
adam@1531 4566 | DStr (x, _, _, str) => (print (box [string ("<" ^ x ^ ">"),
adam@1531 4567 newline,
adam@1531 4568 newline]);
adam@1531 4569 dumpStr (str, env);
adam@1531 4570 print (box [string ("</" ^ x ^ ">"),
adam@1531 4571 newline,
adam@1531 4572 newline]);
adam@1531 4573 E.declBinds env d)
adam@1531 4574 | _ => E.declBinds env d
adam@1531 4575
adam@1531 4576 and dumpStr (str, env) =
adam@1531 4577 case #1 str of
adam@1531 4578 StrConst ds => ignore (foldl dumpDecl env ds)
adam@1531 4579 | _ => ()
adam@1531 4580 in
adam@1531 4581 ignore (foldl dumpDecl env' file)
adam@1531 4582 end
adam@1531 4583 else
adam@1531 4584 ();
adam@1345 4585
adamc@325 4586 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4587 :: ds
adamc@325 4588 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4589 :: ds' @ file
adamc@56 4590 end
adamc@2 4591
adamc@2 4592 end