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annotate src/elaborate.sml @ 1197:6d8e3dcb9713

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New release
author Adam Chlipala <adamc@hcoop.net>
date Thu, 01 Apr 2010 17:23:17 -0400
parents 61c3139eab12
children c316ca3c9ec6
rev   line source
adamc@1191 1 (* Copyright (c) 2008-2010, Adam Chlipala
adamc@445 2 * All rights reserved.
adamc@445 3 *
adamc@445 4 * Redistribution and use in source and binary forms, with or without
adamc@445 5 * modification, are permitted provided that the following conditions are met:
adamc@445 6 *
adamc@445 7 * - Redistributions of source code must retain the above copyright notice,
adamc@445 8 * this list of conditions and the following disclaimer.
adamc@445 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445 10 * this list of conditions and the following disclaimer in the documentation
adamc@445 11 * and/or other materials provided with the distribution.
adamc@445 12 * - The names of contributors may not be used to endorse or promote products
adamc@445 13 * derived from this software without specific prior written permission.
adamc@445 14 *
adamc@445 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445 26 *)
adamc@403 27
adamc@403 28 structure Elaborate :> ELABORATE = struct
adamc@403 29
adamc@403 30 structure P = Prim
adamc@403 31 structure L = Source
adamc@403 32 structure L' = Elab
adamc@403 33 structure E = ElabEnv
adamc@403 34 structure U = ElabUtil
adamc@403 35 structure D = Disjoint
adamc@403 36
adamc@403 37 open Print
adamc@403 38 open ElabPrint
adamc@403 39 open ElabErr
adamc@403 40
adamc@819 41 structure IS = IntBinarySet
adamc@403 42 structure IM = IntBinaryMap
adamc@403 43
adamc@403 44 structure SK = struct
adamc@403 45 type ord_key = string
adamc@403 46 val compare = String.compare
adamc@403 47 end
adamc@403 48
adamc@403 49 structure SS = BinarySetFn(SK)
adamc@403 50 structure SM = BinaryMapFn(SK)
adamc@403 51
adamc@403 52 val basis_r = ref 0
adamc@633 53 val top_r = ref 0
adamc@403 54
adamc@403 55 fun elabExplicitness e =
adamc@403 56 case e of
adamc@403 57 L.Explicit => L'.Explicit
adamc@403 58 | L.Implicit => L'.Implicit
adamc@403 59
adamc@403 60 fun occursKind r =
adamc@403 61 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 62 | _ => false)
adamc@403 63
adamc@403 64 exception KUnify' of kunify_error
adamc@403 65
adamc@623 66 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 67 let
adamc@403 68 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403 69 in
adamc@403 70 case (k1, k2) of
adamc@403 71 (L'.KType, L'.KType) => ()
adamc@403 72 | (L'.KUnit, L'.KUnit) => ()
adamc@403 73
adamc@403 74 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623 75 (unifyKinds' env d1 d2;
adamc@623 76 unifyKinds' env r1 r2)
adamc@403 77 | (L'.KName, L'.KName) => ()
adamc@623 78 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403 79 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623 80 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403 81 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 82
adamc@623 83 | (L'.KRel n1, L'.KRel n2) =>
adamc@623 84 if n1 = n2 then
adamc@623 85 ()
adamc@623 86 else
adamc@623 87 err KIncompatible
adamc@623 88 | (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623 89 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623 90
adamc@403 91 | (L'.KError, _) => ()
adamc@403 92 | (_, L'.KError) => ()
adamc@403 93
adamc@623 94 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' env k1All k2All
adamc@623 95 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' env k1All k2All
adamc@403 96
adamc@403 97 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403 98 if r1 = r2 then
adamc@403 99 ()
adamc@403 100 else
adamc@403 101 r1 := SOME k2All
adamc@403 102
adamc@403 103 | (L'.KUnif (_, _, r), _) =>
adamc@403 104 if occursKind r k2All then
adamc@403 105 err KOccursCheckFailed
adamc@403 106 else
adamc@403 107 r := SOME k2All
adamc@403 108 | (_, L'.KUnif (_, _, r)) =>
adamc@403 109 if occursKind r k1All then
adamc@403 110 err KOccursCheckFailed
adamc@403 111 else
adamc@403 112 r := SOME k1All
adamc@403 113
adamc@403 114 | _ => err KIncompatible
adamc@403 115 end
adamc@403 116
adamc@403 117 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403 118
adamc@623 119 fun unifyKinds env k1 k2 =
adamc@623 120 unifyKinds' env k1 k2
adamc@403 121 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403 122
adamc@403 123 fun checkKind env c k1 k2 =
adamc@623 124 unifyKinds env k1 k2
adamc@403 125 handle KUnify (k1, k2, err) =>
adamc@403 126 conError env (WrongKind (c, k1, k2, err))
adamc@403 127
adamc@403 128 val dummy = ErrorMsg.dummySpan
adamc@403 129
adamc@403 130 val ktype = (L'.KType, dummy)
adamc@403 131 val kname = (L'.KName, dummy)
adamc@403 132 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 133
adamc@403 134 val cerror = (L'.CError, dummy)
adamc@403 135 val kerror = (L'.KError, dummy)
adamc@403 136 val eerror = (L'.EError, dummy)
adamc@403 137 val sgnerror = (L'.SgnError, dummy)
adamc@403 138 val strerror = (L'.StrError, dummy)
adamc@403 139
adamc@403 140 val int = ref cerror
adamc@403 141 val float = ref cerror
adamc@403 142 val string = ref cerror
adamc@821 143 val char = ref cerror
adamc@403 144 val table = ref cerror
adamc@403 145
adamc@403 146 local
adamc@403 147 val count = ref 0
adamc@403 148 in
adamc@403 149
adamc@403 150 fun resetKunif () = count := 0
adamc@403 151
adamc@403 152 fun kunif loc =
adamc@403 153 let
adamc@403 154 val n = !count
adamc@403 155 val s = if n <= 26 then
adamc@403 156 str (chr (ord #"A" + n))
adamc@403 157 else
adamc@403 158 "U" ^ Int.toString (n - 26)
adamc@403 159 in
adamc@403 160 count := n + 1;
adamc@838 161 (L'.KUnif (loc, s, ref NONE), loc)
adamc@403 162 end
adamc@403 163
adamc@403 164 end
adamc@403 165
adamc@403 166 local
adamc@403 167 val count = ref 0
adamc@403 168 in
adamc@403 169
adamc@403 170 fun resetCunif () = count := 0
adamc@403 171
adamc@403 172 fun cunif (loc, k) =
adamc@403 173 let
adamc@403 174 val n = !count
adamc@712 175 val s = if n < 26 then
adamc@403 176 str (chr (ord #"A" + n))
adamc@403 177 else
adamc@403 178 "U" ^ Int.toString (n - 26)
adamc@403 179 in
adamc@403 180 count := n + 1;
adamc@838 181 (L'.CUnif (loc, k, s, ref NONE), loc)
adamc@403 182 end
adamc@403 183
adamc@403 184 end
adamc@403 185
adamc@623 186 fun elabKind env (k, loc) =
adamc@403 187 case k of
adamc@403 188 L.KType => (L'.KType, loc)
adamc@623 189 | L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403 190 | L.KName => (L'.KName, loc)
adamc@623 191 | L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403 192 | L.KUnit => (L'.KUnit, loc)
adamc@623 193 | L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adamc@403 194 | L.KWild => kunif loc
adamc@403 195
adamc@623 196 | L.KVar s => (case E.lookupK env s of
adamc@623 197 NONE =>
adamc@623 198 (kindError env (UnboundKind (loc, s));
adamc@623 199 kerror)
adamc@623 200 | SOME n => (L'.KRel n, loc))
adamc@623 201 | L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623 202
adamc@621 203 fun mapKind (dom, ran, loc)=
adamc@621 204 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621 205 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621 206 (L'.KRecord ran, loc)), loc)), loc)
adamc@403 207
adamc@403 208 fun hnormKind (kAll as (k, _)) =
adamc@403 209 case k of
adamc@403 210 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403 211 | _ => kAll
adamc@403 212
adamc@623 213 open ElabOps
adamc@623 214
adamc@623 215 fun elabConHead (c as (_, loc)) k =
adamc@623 216 let
adamc@623 217 fun unravel (k, c) =
adamc@623 218 case hnormKind k of
adamc@623 219 (L'.KFun (x, k'), _) =>
adamc@623 220 let
adamc@623 221 val u = kunif loc
adamc@623 222
adamc@623 223 val k'' = subKindInKind (0, u) k'
adamc@623 224 in
adamc@623 225 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623 226 end
adamc@623 227 | _ => (c, k)
adamc@623 228 in
adamc@623 229 unravel (k, c)
adamc@623 230 end
adamc@623 231
adamc@403 232 fun elabCon (env, denv) (c, loc) =
adamc@403 233 case c of
adamc@403 234 L.CAnnot (c, k) =>
adamc@403 235 let
adamc@623 236 val k' = elabKind env k
adamc@403 237 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 238 in
adamc@403 239 checkKind env c' ck k';
adamc@403 240 (c', k', gs)
adamc@403 241 end
adamc@403 242
adamc@403 243 | L.TFun (t1, t2) =>
adamc@403 244 let
adamc@403 245 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 246 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 247 in
adamc@403 248 checkKind env t1' k1 ktype;
adamc@403 249 checkKind env t2' k2 ktype;
adamc@403 250 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 251 end
adamc@403 252 | L.TCFun (e, x, k, t) =>
adamc@403 253 let
adamc@403 254 val e' = elabExplicitness e
adamc@623 255 val k' = elabKind env k
adamc@403 256 val env' = E.pushCRel env x k'
adamc@403 257 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 258 in
adamc@403 259 checkKind env t' tk ktype;
adamc@403 260 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 261 end
adamc@623 262 | L.TKFun (x, t) =>
adamc@623 263 let
adamc@623 264 val env' = E.pushKRel env x
adamc@623 265 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 266 in
adamc@623 267 checkKind env t' tk ktype;
adamc@623 268 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623 269 end
adamc@628 270 | L.TDisjoint (c1, c2, c) =>
adamc@403 271 let
adamc@403 272 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 273 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 274
adamc@403 275 val ku1 = kunif loc
adamc@403 276 val ku2 = kunif loc
adamc@403 277
adamc@628 278 val denv' = D.assert env denv (c1', c2')
adamc@403 279 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 280 in
adamc@403 281 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 282 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@403 283
adamc@628 284 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403 285 end
adamc@403 286 | L.TRecord c =>
adamc@403 287 let
adamc@403 288 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 289 val k = (L'.KRecord ktype, loc)
adamc@403 290 in
adamc@403 291 checkKind env c' ck k;
adamc@403 292 ((L'.TRecord c', loc), ktype, gs)
adamc@403 293 end
adamc@403 294
adamc@403 295 | L.CVar ([], s) =>
adamc@403 296 (case E.lookupC env s of
adamc@403 297 E.NotBound =>
adamc@403 298 (conError env (UnboundCon (loc, s));
adamc@403 299 (cerror, kerror, []))
adamc@403 300 | E.Rel (n, k) =>
adamc@623 301 let
adamc@623 302 val (c, k) = elabConHead (L'.CRel n, loc) k
adamc@623 303 in
adamc@623 304 (c, k, [])
adamc@623 305 end
adamc@403 306 | E.Named (n, k) =>
adamc@623 307 let
adamc@623 308 val (c, k) = elabConHead (L'.CNamed n, loc) k
adamc@623 309 in
adamc@623 310 (c, k, [])
adamc@623 311 end)
adamc@403 312 | L.CVar (m1 :: ms, s) =>
adamc@403 313 (case E.lookupStr env m1 of
adamc@403 314 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 315 (cerror, kerror, []))
adamc@403 316 | SOME (n, sgn) =>
adamc@403 317 let
adamc@403 318 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 319 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 320 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 321 (strerror, sgnerror))
adamc@403 322 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 323 ((L'.StrVar n, loc), sgn) ms
adamc@403 324
adamc@403 325 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403 326 NONE => (conError env (UnboundCon (loc, s));
adamc@403 327 kerror)
adamc@403 328 | SOME (k, _) => k
adamc@987 329 val (c, k) = elabConHead (L'.CModProj (n, ms, s), loc) k
adamc@403 330 in
adamc@987 331 (c, k, [])
adamc@403 332 end)
adamc@403 333
adamc@403 334 | L.CApp (c1, c2) =>
adamc@403 335 let
adamc@403 336 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 337 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 338 val dom = kunif loc
adamc@403 339 val ran = kunif loc
adamc@403 340 in
adamc@403 341 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 342 checkKind env c2' k2 dom;
adamc@403 343 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 344 end
adamc@403 345 | L.CAbs (x, ko, t) =>
adamc@403 346 let
adamc@403 347 val k' = case ko of
adamc@403 348 NONE => kunif loc
adamc@623 349 | SOME k => elabKind env k
adamc@403 350 val env' = E.pushCRel env x k'
adamc@403 351 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 352 in
adamc@403 353 ((L'.CAbs (x, k', t'), loc),
adamc@403 354 (L'.KArrow (k', tk), loc),
adamc@403 355 gs)
adamc@403 356 end
adamc@623 357 | L.CKAbs (x, t) =>
adamc@623 358 let
adamc@623 359 val env' = E.pushKRel env x
adamc@623 360 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 361 in
adamc@623 362 ((L'.CKAbs (x, t'), loc),
adamc@623 363 (L'.KFun (x, tk), loc),
adamc@623 364 gs)
adamc@623 365 end
adamc@403 366
adamc@403 367 | L.CName s =>
adamc@403 368 ((L'.CName s, loc), kname, [])
adamc@403 369
adamc@403 370 | L.CRecord xcs =>
adamc@403 371 let
adamc@403 372 val k = kunif loc
adamc@403 373
adamc@403 374 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 375 let
adamc@403 376 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 377 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 378 in
adamc@403 379 checkKind env x' xk kname;
adamc@403 380 checkKind env c' ck k;
adamc@403 381 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 382 end) [] xcs
adamc@403 383
adamc@403 384 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 385 (* Add duplicate field checking later. *)
adamc@403 386
adamc@403 387 fun prove (xcs, ds) =
adamc@403 388 case xcs of
adamc@403 389 [] => ds
adamc@403 390 | xc :: rest =>
adamc@403 391 let
adamc@403 392 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 393 val ds = foldl (fn (xc', ds) =>
adamc@403 394 let
adamc@403 395 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 396 in
adamc@403 397 D.prove env denv (r1, r2, loc) @ ds
adamc@403 398 end)
adamc@403 399 ds rest
adamc@403 400 in
adamc@403 401 prove (rest, ds)
adamc@403 402 end
adamc@403 403 in
adamc@403 404 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 405 end
adamc@403 406 | L.CConcat (c1, c2) =>
adamc@403 407 let
adamc@403 408 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 409 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 410 val ku = kunif loc
adamc@403 411 val k = (L'.KRecord ku, loc)
adamc@403 412 in
adamc@403 413 checkKind env c1' k1 k;
adamc@403 414 checkKind env c2' k2 k;
adamc@403 415 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 416 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 417 end
adamc@621 418 | L.CMap =>
adamc@403 419 let
adamc@403 420 val dom = kunif loc
adamc@403 421 val ran = kunif loc
adamc@403 422 in
adamc@621 423 ((L'.CMap (dom, ran), loc),
adamc@621 424 mapKind (dom, ran, loc),
adamc@403 425 [])
adamc@403 426 end
adamc@403 427
adamc@403 428 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 429
adamc@403 430 | L.CTuple cs =>
adamc@403 431 let
adamc@403 432 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 433 let
adamc@403 434 val (c', k, gs') = elabCon (env, denv) c
adamc@403 435 in
adamc@403 436 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 437 end) ([], [], []) cs
adamc@403 438 in
adamc@403 439 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 440 end
adamc@403 441 | L.CProj (c, n) =>
adamc@403 442 let
adamc@403 443 val (c', k, gs) = elabCon (env, denv) c
adamc@403 444 in
adamc@403 445 case hnormKind k of
adamc@403 446 (L'.KTuple ks, _) =>
adamc@403 447 if n <= 0 orelse n > length ks then
adamc@403 448 (conError env (ProjBounds (c', n));
adamc@83 449 (cerror, kerror, []))
adamc@403 450 else
adamc@403 451 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@403 452 | k => (conError env (ProjMismatch (c', k));
adamc@403 453 (cerror, kerror, []))
adamc@403 454 end
adamc@403 455
adamc@403 456 | L.CWild k =>
adamc@403 457 let
adamc@623 458 val k' = elabKind env k
adamc@403 459 in
adamc@403 460 (cunif (loc, k'), k', [])
adamc@403 461 end
adamc@403 462
adamc@403 463 fun kunifsRemain k =
adamc@403 464 case k of
adamc@403 465 L'.KUnif (_, _, ref NONE) => true
adamc@403 466 | _ => false
adamc@403 467 fun cunifsRemain c =
adamc@403 468 case c of
adamc@710 469 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@403 470 | _ => NONE
adamc@403 471
adamc@403 472 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 473 con = fn _ => false,
adamc@403 474 exp = fn _ => false,
adamc@403 475 sgn_item = fn _ => false,
adamc@403 476 sgn = fn _ => false,
adamc@403 477 str = fn _ => false,
adamc@403 478 decl = fn _ => false}
adamc@403 479
adamc@403 480 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@403 481 con = cunifsRemain,
adamc@403 482 exp = fn _ => NONE,
adamc@403 483 sgn_item = fn _ => NONE,
adamc@403 484 sgn = fn _ => NONE,
adamc@403 485 str = fn _ => NONE,
adamc@403 486 decl = fn _ => NONE}
adamc@403 487
adamc@403 488 fun occursCon r =
adamc@403 489 U.Con.exists {kind = fn _ => false,
adamc@403 490 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@403 491 | _ => false}
adamc@403 492
adamc@403 493 exception CUnify' of cunify_error
adamc@403 494
adamc@403 495 exception SynUnif = E.SynUnif
adamc@403 496
adamc@403 497 type record_summary = {
adamc@403 498 fields : (L'.con * L'.con) list,
adamc@403 499 unifs : (L'.con * L'.con option ref) list,
adamc@403 500 others : L'.con list
adamc@403 501 }
adamc@403 502
adamc@403 503 fun summaryToCon {fields, unifs, others} =
adamc@403 504 let
adamc@403 505 val c = (L'.CRecord (ktype, []), dummy)
adamc@403 506 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403 507 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403 508 in
adamc@403 509 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403 510 end
adamc@403 511
adamc@403 512 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 513
adamc@403 514 exception CUnify of L'.con * L'.con * cunify_error
adamc@403 515
adamc@403 516 fun kindof env (c, loc) =
adamc@403 517 case c of
adamc@403 518 L'.TFun _ => ktype
adamc@403 519 | L'.TCFun _ => ktype
adamc@403 520 | L'.TRecord _ => ktype
adamc@628 521 | L'.TDisjoint _ => ktype
adamc@403 522
adamc@403 523 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 524 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 525 | L'.CModProj (n, ms, x) =>
adamc@403 526 let
adamc@403 527 val (_, sgn) = E.lookupStrNamed env n
adamc@403 528 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 529 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 530 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 531 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 532 ((L'.StrVar n, loc), sgn) ms
adamc@403 533 in
adamc@403 534 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 535 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 536 | SOME (k, _) => k
adamc@403 537 end
adamc@403 538
adamc@403 539 | L'.CApp (c, _) =>
adamc@403 540 (case hnormKind (kindof env c) of
adamc@403 541 (L'.KArrow (_, k), _) => k
adamc@403 542 | (L'.KError, _) => kerror
adamc@413 543 | k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403 544 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628 545
adamc@403 546
adamc@403 547 | L'.CName _ => kname
adamc@403 548
adamc@403 549 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 550 | L'.CConcat (c, _) => kindof env c
adamc@621 551 | L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403 552
adamc@403 553 | L'.CUnit => (L'.KUnit, loc)
adamc@403 554
adamc@403 555 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 556 | L'.CProj (c, n) =>
adamc@403 557 (case hnormKind (kindof env c) of
adamc@403 558 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@413 559 | k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403 560
adamc@403 561 | L'.CError => kerror
adamc@403 562 | L'.CUnif (_, k, _, _) => k
adamc@403 563
adamc@623 564 | L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623 565 | L'.CKApp (c, k) =>
adamc@623 566 (case hnormKind (kindof env c) of
adamc@623 567 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623 568 | k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623 569 | L'.TKFun _ => ktype
adamc@403 570
adamc@621 571 exception GuessFailure
adamc@403 572
adamc@513 573 fun isUnitCon env (c, loc) =
adamc@513 574 case c of
adamc@513 575 L'.TFun _ => false
adamc@513 576 | L'.TCFun _ => false
adamc@513 577 | L'.TRecord _ => false
adamc@628 578 | L'.TDisjoint _ => false
adamc@513 579
adamc@513 580 | L'.CRel xn => #1 (#2 (E.lookupCRel env xn)) = L'.KUnit
adamc@513 581 | L'.CNamed xn => #1 (#2 (E.lookupCNamed env xn)) = L'.KUnit
adamc@518 582 | L'.CModProj (n, ms, x) => false
adamc@518 583 (*let
adamc@513 584 val (_, sgn) = E.lookupStrNamed env n
adamc@513 585 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513 586 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513 587 NONE => raise Fail "kindof: Unknown substructure"
adamc@513 588 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513 589 ((L'.StrVar n, loc), sgn) ms
adamc@513 590 in
adamc@513 591 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513 592 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513 593 | SOME ((k, _), _) => k = L'.KUnit
adamc@518 594 end*)
adamc@518 595
adamc@518 596 | L'.CApp (c, _) => false
adamc@518 597 (*(case hnormKind (kindof env c) of
adamc@513 598 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513 599 | (L'.KError, _) => false
adamc@518 600 | k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513 601 | L'.CAbs _ => false
adamc@513 602
adamc@513 603 | L'.CName _ => false
adamc@513 604
adamc@513 605 | L'.CRecord _ => false
adamc@513 606 | L'.CConcat _ => false
adamc@621 607 | L'.CMap _ => false
adamc@513 608
adamc@513 609 | L'.CUnit => true
adamc@513 610
adamc@513 611 | L'.CTuple _ => false
adamc@518 612 | L'.CProj (c, n) => false
adamc@518 613 (*(case hnormKind (kindof env c) of
adamc@513 614 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518 615 | k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513 616
adamc@513 617 | L'.CError => false
adamc@513 618 | L'.CUnif (_, k, _, _) => #1 k = L'.KUnit
adamc@513 619
adamc@623 620 | L'.CKAbs _ => false
adamc@623 621 | L'.CKApp _ => false
adamc@623 622 | L'.TKFun _ => false
adamc@623 623
adamc@709 624 val recdCounter = ref 0
adamc@709 625
adamc@713 626 val mayDelay = ref false
adamc@777 627 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777 628
adamc@830 629 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830 630
adamc@777 631 fun unifyRecordCons env (loc, c1, c2) =
adamc@403 632 let
adamc@403 633 fun rkindof c =
adamc@403 634 case hnormKind (kindof env c) of
adamc@403 635 (L'.KRecord k, _) => k
adamc@403 636 | (L'.KError, _) => kerror
adamc@753 637 | (L'.KUnif (_, _, r), _) =>
adamc@753 638 let
adamc@753 639 val k = kunif (#2 c)
adamc@753 640 in
adamc@753 641 r := SOME (L'.KRecord k, #2 c);
adamc@753 642 k
adamc@753 643 end
adamc@413 644 | k => raise CUnify' (CKindof (k, c, "record"))
adamc@403 645
adamc@403 646 val k1 = rkindof c1
adamc@403 647 val k2 = rkindof c2
adamc@403 648
adamc@628 649 val r1 = recordSummary env c1
adamc@628 650 val r2 = recordSummary env c2
adamc@403 651 in
adamc@623 652 unifyKinds env k1 k2;
adamc@777 653 unifySummaries env (loc, k1, r1, r2)
adamc@403 654 end
adamc@403 655
adamc@777 656 and normalizeRecordSummary env (r : record_summary) =
adamc@777 657 recordSummary env (summaryToCon r)
adamc@777 658
adamc@628 659 and recordSummary env c =
adamc@403 660 let
adamc@628 661 val c = hnormCon env c
adamc@628 662
adamc@628 663 val sum =
adamc@403 664 case c of
adamc@628 665 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403 666 | (L'.CConcat (c1, c2), _) =>
adamc@403 667 let
adamc@628 668 val s1 = recordSummary env c1
adamc@628 669 val s2 = recordSummary env c2
adamc@403 670 in
adamc@628 671 {fields = #fields s1 @ #fields s2,
adamc@628 672 unifs = #unifs s1 @ #unifs s2,
adamc@628 673 others = #others s1 @ #others s2}
adamc@403 674 end
adamc@628 675 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary env c
adamc@628 676 | c' as (L'.CUnif (_, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628 677 | c' => {fields = [], unifs = [], others = [c']}
adamc@403 678 in
adamc@628 679 sum
adamc@403 680 end
adamc@403 681
adamc@987 682 and consEq env loc (c1, c2) =
adamc@777 683 let
adamc@777 684 val mayDelay' = !mayDelay
adamc@777 685 in
adamc@777 686 (mayDelay := false;
adamc@987 687 unifyCons env loc c1 c2;
adamc@777 688 mayDelay := mayDelay';
adamc@777 689 true)
adamc@777 690 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777 691 end
adamc@403 692
adamc@403 693 and consNeq env (c1, c2) =
adamc@628 694 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403 695 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093 696 | (L'.CName _, L'.CRel _) => true
adamc@1093 697 | (L'.CRel _, L'.CName _) => true
adamc@1093 698 | (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093 699 | (L'.CRel _, L'.CNamed _) => true
adamc@1093 700 | (L'.CNamed _, L'.CRel _) => true
adamc@1093 701 | (L'.CRel _, L'.CModProj _) => true
adamc@1093 702 | (L'.CModProj _, L'.CRel _) => true
adamc@403 703 | _ => false
adamc@403 704
adamc@777 705 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403 706 let
adamc@848 707 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@848 708 ("#1", p_summary env s1),
adamc@848 709 ("#2", p_summary env s2)]*)
adamc@403 710
adamc@403 711 fun eatMatching p (ls1, ls2) =
adamc@403 712 let
adamc@403 713 fun em (ls1, ls2, passed1) =
adamc@403 714 case ls1 of
adamc@403 715 [] => (rev passed1, ls2)
adamc@403 716 | h1 :: t1 =>
adamc@403 717 let
adamc@403 718 fun search (ls2', passed2) =
adamc@403 719 case ls2' of
adamc@403 720 [] => em (t1, ls2, h1 :: passed1)
adamc@403 721 | h2 :: t2 =>
adamc@403 722 if p (h1, h2) then
adamc@403 723 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 724 else
adamc@403 725 search (t2, h2 :: passed2)
adamc@403 726 in
adamc@403 727 search (ls2, [])
adamc@403 728 end
adamc@403 729 in
adamc@403 730 em (ls1, ls2, [])
adamc@403 731 end
adamc@403 732
adamc@403 733 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 734 not (consNeq env (x1, x2))
adamc@987 735 andalso consEq env loc (c1, c2)
adamc@987 736 andalso consEq env loc (x1, x2))
adamc@403 737 (#fields s1, #fields s2)
adamc@403 738 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 739 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 740
adamc@403 741 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 742
adamc@987 743 val (others1, others2) = eatMatching (consEq env loc) (#others s1, #others s2)
adamc@403 744 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 745 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 746
adamc@709 747 fun unsummarize {fields, unifs, others} =
adamc@709 748 let
adamc@709 749 val c = (L'.CRecord (k, fields), loc)
adamc@709 750
adamc@709 751 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709 752 c unifs
adamc@709 753 in
adamc@709 754 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709 755 c others
adamc@709 756 end
adamc@709 757
adamc@710 758 val empties = ([], [], [], [], [], [])
adamc@710 759
adamc@709 760 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709 761 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@709 762 orig as ([(_, r)], [], [], _, _, _) =>
adamc@709 763 let
adamc@709 764 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709 765 in
adamc@709 766 if occursCon r c then
adamc@709 767 orig
adamc@709 768 else
adamc@709 769 (r := SOME c;
adamc@710 770 empties)
adamc@709 771 end
adamc@709 772 | orig as (_, _, _, [(_, r)], [], []) =>
adamc@709 773 let
adamc@709 774 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709 775 in
adamc@709 776 if occursCon r c then
adamc@709 777 orig
adamc@709 778 else
adamc@709 779 (r := SOME c;
adamc@710 780 empties)
adamc@709 781 end
adamc@710 782 | orig as ([(_, r1 as ref NONE)], _, [], [(_, r2 as ref NONE)], _, []) =>
adamc@710 783 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710 784 let
adamc@838 785 val kr = (L'.KRecord k, loc)
adamc@710 786 val u = cunif (loc, kr)
adamc@710 787 in
adamc@710 788 r1 := SOME (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc);
adamc@710 789 r2 := SOME (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc);
adamc@710 790 empties
adamc@710 791 end
adamc@710 792 else
adamc@710 793 orig
adamc@709 794 | orig => orig
adamc@709 795
adamc@403 796 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777 797 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 798
adamc@753 799 fun isGuessable (other, fs, unifs) =
adamc@753 800 let
adamc@753 801 val c = (L'.CRecord (k, fs), loc)
adamc@753 802 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753 803 in
adamc@987 804 (guessMap env loc (other, c, GuessFailure);
adamc@753 805 true)
adamc@753 806 handle GuessFailure => false
adamc@753 807 end
adamc@403 808
adamc@754 809 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753 810 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753 811 ([], _, [other1], [], [], _) =>
adamc@753 812 if isGuessable (other1, fs2, unifs2) then
adamc@754 813 ([], [], [], [], [], [])
adamc@403 814 else
adamc@754 815 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753 816 | (_, [], [], [other2], _, []) =>
adamc@777 817 if isGuessable (other2, fs1, unifs1) then
adamc@777 818 ([], [], [], [], [], [])
adamc@777 819 else
adamc@777 820 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754 821 | _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403 822
adamc@403 823 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 824 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 825
adamc@838 826 val empty = (L'.CRecord (k, []), loc)
adamc@1071 827 fun failure () =
adamc@1071 828 let
adamc@1071 829 val fs2 = #fields s2
adamc@1071 830
adamc@1071 831 fun findPointwise fs1 =
adamc@1071 832 case fs1 of
adamc@1071 833 [] => NONE
adamc@1071 834 | (nm1, c1) :: fs1 =>
adamc@1071 835 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071 836 NONE => findPointwise fs1
adamc@1071 837 | SOME (_, c2) =>
adamc@1071 838 if consEq env loc (c1, c2) then
adamc@1071 839 findPointwise fs1
adamc@1071 840 else
adamc@1071 841 SOME (nm1, c1, c2)
adamc@1071 842 in
adamc@1071 843 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071 844 end
adamc@709 845 in
adamc@777 846 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777 847 (_, [], [], [], [], []) =>
adamc@777 848 app (fn (_, r) => r := SOME empty) unifs1
adamc@777 849 | ([], [], [], _, [], []) =>
adamc@777 850 app (fn (_, r) => r := SOME empty) unifs2
adamc@777 851 | _ =>
adamc@777 852 if !mayDelay then
adamc@777 853 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adamc@777 854 else
adamc@777 855 failure ())
adamc@777 856
adamc@777 857 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777 858 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403 859 end
adamc@403 860
adamc@987 861 and guessMap env loc (c1, c2, ex) =
adamc@403 862 let
adamc@621 863 fun unfold (dom, ran, f, r, c) =
adamc@403 864 let
adamc@621 865 fun unfold (r, c) =
adamc@754 866 case #1 (hnormCon env c) of
adamc@987 867 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628 868 | L'.CRecord (_, [(x, v)]) =>
adamc@628 869 let
adamc@628 870 val v' = case dom of
adamc@628 871 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628 872 | _ => cunif (loc, dom)
adamc@628 873 in
adamc@987 874 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987 875 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 876 end
adamc@628 877 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 878 let
adamc@628 879 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 880 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 881 in
adamc@628 882 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 883 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987 884 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 885 end
adamc@628 886 | L'.CConcat (c1', c2') =>
adamc@628 887 let
adamc@628 888 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 889 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 890 in
adamc@628 891 unfold (r1, c1');
adamc@628 892 unfold (r2, c2');
adamc@987 893 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 894 end
adamc@754 895 | L'.CUnif (_, _, _, ur) =>
adamc@777 896 ur := SOME (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adamc@628 897 | _ => raise ex
adamc@403 898 in
adamc@621 899 unfold (r, c)
adamc@403 900 end
adamc@632 901 handle _ => raise ex
adamc@403 902 in
adamc@403 903 case (#1 c1, #1 c2) of
adamc@621 904 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 905 unfold (dom, ran, f, r, c2)
adamc@621 906 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 907 unfold (dom, ran, f, r, c1)
adamc@403 908 | _ => raise ex
adamc@403 909 end
adamc@403 910
adamc@987 911 and unifyCons' env loc c1 c2 =
adamc@628 912 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 913 ()
adamc@628 914 else
adamc@403 915 let
adamc@628 916 (*val befor = Time.now ()
adamc@628 917 val old1 = c1
adamc@628 918 val old2 = c2*)
adamc@628 919 val c1 = hnormCon env c1
adamc@628 920 val c2 = hnormCon env c2
adamc@403 921 in
adamc@987 922 unifyCons'' env loc c1 c2
adamc@987 923 handle ex => guessMap env loc (c1, c2, ex)
adamc@403 924 end
adamc@628 925
adamc@987 926 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403 927 let
adamc@403 928 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 929
adamc@706 930 fun projSpecial1 (c1, n1, onFail) =
adamc@403 931 let
adamc@632 932 fun trySnd () =
adamc@632 933 case #1 (hnormCon env c2All) of
adamc@632 934 L'.CProj (c2, n2) =>
adamc@632 935 let
adamc@632 936 fun tryNormal () =
adamc@632 937 if n1 = n2 then
adamc@987 938 unifyCons' env loc c1 c2
adamc@632 939 else
adamc@706 940 onFail ()
adamc@632 941 in
adamc@632 942 case #1 (hnormCon env c2) of
adamc@632 943 L'.CUnif (_, k, _, r) =>
adamc@632 944 (case #1 (hnormKind k) of
adamc@632 945 L'.KTuple ks =>
adamc@632 946 let
adamc@632 947 val loc = #2 c2
adamc@632 948 val us = map (fn k => cunif (loc, k)) ks
adamc@632 949 in
adamc@632 950 r := SOME (L'.CTuple us, loc);
adamc@987 951 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632 952 end
adamc@632 953 | _ => tryNormal ())
adamc@632 954 | _ => tryNormal ()
adamc@632 955 end
adamc@706 956 | _ => onFail ()
adamc@403 957 in
adamc@632 958 case #1 (hnormCon env c1) of
adamc@632 959 L'.CUnif (_, k, _, r) =>
adamc@632 960 (case #1 (hnormKind k) of
adamc@632 961 L'.KTuple ks =>
adamc@632 962 let
adamc@632 963 val loc = #2 c1
adamc@632 964 val us = map (fn k => cunif (loc, k)) ks
adamc@632 965 in
adamc@632 966 r := SOME (L'.CTuple us, loc);
adamc@987 967 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632 968 end
adamc@632 969 | _ => trySnd ())
adamc@632 970 | _ => trySnd ()
adamc@403 971 end
adamc@632 972
adamc@706 973 fun projSpecial2 (c2, n2, onFail) =
adamc@706 974 case #1 (hnormCon env c2) of
adamc@706 975 L'.CUnif (_, k, _, r) =>
adamc@706 976 (case #1 (hnormKind k) of
adamc@706 977 L'.KTuple ks =>
adamc@706 978 let
adamc@706 979 val loc = #2 c2
adamc@706 980 val us = map (fn k => cunif (loc, k)) ks
adamc@706 981 in
adamc@706 982 r := SOME (L'.CTuple us, loc);
adamc@987 983 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706 984 end
adamc@706 985 | _ => onFail ())
adamc@706 986 | _ => onFail ()
adamc@706 987
adamc@777 988 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706 989
adamc@706 990 fun isRecord () =
adamc@706 991 case (c1, c2) of
adamc@706 992 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706 993 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706 994 | _ => isRecord' ()
adamc@706 995 in
adamc@706 996 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@706 997 ("c2All", p_con env c2All)];*)
adamc@706 998
adamc@706 999 case (c1, c2) of
adamc@706 1000 (L'.CError, _) => ()
adamc@706 1001 | (_, L'.CError) => ()
adamc@403 1002
adamc@705 1003 | (L'.CRecord _, _) => isRecord ()
adamc@705 1004 | (_, L'.CRecord _) => isRecord ()
adamc@705 1005 | (L'.CConcat _, _) => isRecord ()
adamc@705 1006 | (_, L'.CConcat _) => isRecord ()
adamc@705 1007
adamc@705 1008 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@705 1009 if r1 = r2 then
adamc@705 1010 ()
adamc@705 1011 else
adamc@705 1012 (unifyKinds env k1 k2;
adamc@705 1013 r1 := SOME c2All)
adamc@705 1014
adamc@705 1015 | (L'.CUnif (_, _, _, r), _) =>
adamc@705 1016 if occursCon r c2All then
adamc@705 1017 err COccursCheckFailed
adamc@705 1018 else
adamc@705 1019 r := SOME c2All
adamc@705 1020 | (_, L'.CUnif (_, _, _, r)) =>
adamc@705 1021 if occursCon r c1All then
adamc@705 1022 err COccursCheckFailed
adamc@705 1023 else
adamc@705 1024 r := SOME c1All
adamc@705 1025
adamc@705 1026 | (L'.CUnit, L'.CUnit) => ()
adamc@705 1027
adamc@705 1028 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987 1029 (unifyCons' env loc d1 d2;
adamc@987 1030 unifyCons' env loc r1 r2)
adamc@705 1031 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705 1032 if expl1 <> expl2 then
adamc@705 1033 err CExplicitness
adamc@705 1034 else
adamc@705 1035 (unifyKinds env d1 d2;
adamc@705 1036 let
adamc@705 1037 (*val befor = Time.now ()*)
adamc@705 1038 val env' = E.pushCRel env x1 d1
adamc@705 1039 in
adamc@705 1040 (*TextIO.print ("E.pushCRel: "
adamc@705 1041 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705 1042 ^ "\n");*)
adamc@987 1043 unifyCons' env' loc r1 r2
adamc@705 1044 end)
adamc@987 1045 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705 1046 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987 1047 (unifyCons' env loc c1 c2;
adamc@987 1048 unifyCons' env loc d1 d2;
adamc@987 1049 unifyCons' env loc e1 e2)
adamc@705 1050
adamc@705 1051 | (L'.CRel n1, L'.CRel n2) =>
adamc@705 1052 if n1 = n2 then
adamc@705 1053 ()
adamc@705 1054 else
adamc@705 1055 err CIncompatible
adamc@705 1056 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@705 1057 if n1 = n2 then
adamc@705 1058 ()
adamc@705 1059 else
adamc@705 1060 err CIncompatible
adamc@705 1061
adamc@705 1062 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987 1063 (unifyCons' env loc d1 d2;
adamc@987 1064 unifyCons' env loc r1 r2)
adamc@705 1065 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705 1066 (unifyKinds env k1 k2;
adamc@987 1067 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705 1068
adamc@705 1069 | (L'.CName n1, L'.CName n2) =>
adamc@705 1070 if n1 = n2 then
adamc@705 1071 ()
adamc@705 1072 else
adamc@705 1073 err CIncompatible
adamc@705 1074
adamc@705 1075 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705 1076 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705 1077 ()
adamc@705 1078 else
adamc@705 1079 err CIncompatible
adamc@705 1080
adamc@705 1081 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987 1082 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705 1083 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705 1084
adamc@706 1085 | (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706 1086 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706 1087
adamc@623 1088 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1089 (unifyKinds env dom1 dom2;
adamc@628 1090 unifyKinds env ran1 ran2)
adamc@623 1091
adamc@623 1092 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987 1093 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623 1094 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1095 (unifyKinds env k1 k2;
adamc@987 1096 unifyCons' env loc c1 c2)
adamc@623 1097 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987 1098 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628 1099
adamc@403 1100 | _ => err CIncompatible
adamc@403 1101 end
adamc@403 1102
adamc@987 1103 and unifyCons env loc c1 c2 =
adamc@987 1104 unifyCons' env loc c1 c2
adamc@403 1105 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 1106 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 1107
adamc@628 1108 fun checkCon env e c1 c2 =
adamc@987 1109 unifyCons env (#2 e) c1 c2
adamc@403 1110 handle CUnify (c1, c2, err) =>
adamc@628 1111 expError env (Unify (e, c1, c2, err))
adamc@628 1112
adamc@628 1113 fun checkPatCon env p c1 c2 =
adamc@987 1114 unifyCons env (#2 p) c1 c2
adamc@403 1115 handle CUnify (c1, c2, err) =>
adamc@628 1116 expError env (PatUnify (p, c1, c2, err))
adamc@71 1117
adamc@403 1118 fun primType env p =
adamc@403 1119 case p of
adamc@403 1120 P.Int _ => !int
adamc@403 1121 | P.Float _ => !float
adamc@403 1122 | P.String _ => !string
adamc@821 1123 | P.Char _ => !char
adamc@623 1124
adamc@403 1125 datatype constraint =
adamc@403 1126 Disjoint of D.goal
adamc@403 1127 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1128
adamc@403 1129 val enD = map Disjoint
adamc@403 1130
adamc@634 1131 fun isClassOrFolder env cl =
adamc@634 1132 E.isClass env cl
adamc@634 1133 orelse case hnormCon env cl of
adamc@634 1134 (L'.CKApp (cl, _), _) =>
adamc@634 1135 (case hnormCon env cl of
adamc@634 1136 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1137 | _ => false)
adamc@634 1138 | _ => false
adamc@634 1139
adamc@629 1140 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1141 let
adamc@898 1142 fun unravelKind (t, e) =
adamc@898 1143 case hnormCon env t of
adamc@898 1144 (L'.TKFun (x, t'), _) =>
adamc@898 1145 let
adamc@898 1146 val u = kunif loc
adamc@898 1147
adamc@898 1148 val t'' = subKindInCon (0, u) t'
adamc@898 1149 in
adamc@898 1150 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898 1151 end
adamc@898 1152 | t => (e, t, [])
adamc@898 1153
adamc@403 1154 fun unravel (t, e) =
adamc@628 1155 case hnormCon env t of
adamc@628 1156 (L'.TKFun (x, t'), _) =>
adamc@628 1157 let
adamc@628 1158 val u = kunif loc
adamc@628 1159
adamc@628 1160 val t'' = subKindInCon (0, u) t'
adamc@628 1161 in
adamc@628 1162 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1163 end
adamc@628 1164 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1165 let
adamc@628 1166 val u = cunif (loc, k)
adamc@628 1167
adamc@628 1168 val t'' = subConInCon (0, u) t'
adamc@628 1169 in
adamc@628 1170 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1171 end
adamc@633 1172 | (L'.TFun (dom, ran), _) =>
adamc@628 1173 let
adamc@633 1174 fun default () = (e, t, [])
adamc@750 1175
adamc@750 1176 fun isInstance () =
adamc@750 1177 if infer <> L.TypesOnly then
adamc@750 1178 let
adamc@750 1179 val r = ref NONE
adamc@750 1180 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750 1181 in
adamc@750 1182 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750 1183 end
adamc@750 1184 else
adamc@750 1185 default ()
adamc@750 1186
adamc@750 1187 fun hasInstance c =
adamc@753 1188 case hnormCon env c of
adamc@753 1189 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753 1190 con = fn c =>
adamc@753 1191 E.isClass env (hnormCon env (c, loc))} c
adamc@753 1192 | c =>
adamc@750 1193 let
adamc@753 1194 fun findHead c =
adamc@753 1195 case #1 c of
adamc@753 1196 L'.CApp (f, _) => findHead f
adamc@753 1197 | _ => c
adamc@753 1198
adamc@753 1199 val cl = hnormCon env (findHead c)
adamc@750 1200 in
adamc@750 1201 isClassOrFolder env cl
adamc@750 1202 end
adamc@628 1203 in
adamc@750 1204 if hasInstance dom then
adamc@750 1205 isInstance ()
adamc@750 1206 else
adamc@750 1207 default ()
adamc@628 1208 end
adamc@629 1209 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1210 if infer <> L.TypesOnly then
adamc@629 1211 let
adamc@792 1212 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629 1213 val (e, t, gs') = unravel (t', e)
adamc@629 1214 in
adamc@629 1215 (e, t, enD gs @ gs')
adamc@629 1216 end
adamc@629 1217 else
adamc@629 1218 (e, t, [])
adamc@628 1219 | t => (e, t, [])
adamc@704 1220 in
adamc@704 1221 case infer of
adamc@898 1222 L.DontInfer => unravelKind (t, e)
adamc@704 1223 | _ => unravel (t, e)
adamc@704 1224 end
adamc@15 1225
adamc@628 1226 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1227 let
adamc@171 1228 val perror = (L'.PWild, loc)
adamc@171 1229 val terror = (L'.CError, loc)
adamc@171 1230 val pterror = (perror, terror)
adamc@171 1231 val rerror = (pterror, (env, bound))
adamc@171 1232
adamc@191 1233 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1234 case (po, to) of
adamc@188 1235 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1236 rerror)
adamc@188 1237 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1238 rerror)
adamc@191 1239 | (NONE, NONE) =>
adamc@191 1240 let
adamc@191 1241 val k = (L'.KType, loc)
adamc@191 1242 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1243 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1244 in
adamc@191 1245 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1246 (env, bound))
adamc@191 1247 end
adamc@188 1248 | (SOME p, SOME t) =>
adamc@188 1249 let
adamc@628 1250 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1251
adamc@191 1252 val k = (L'.KType, loc)
adamc@191 1253 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1254 val nxs = length unifs - 1
adamc@194 1255 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1256 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1257 in
adamc@628 1258 ignore (checkPatCon env p' pt t);
adamc@191 1259 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1260 (env, bound))
adamc@188 1261 end
adamc@171 1262 in
adamc@171 1263 case p of
adamc@171 1264 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1265 (env, bound))
adamc@171 1266 | L.PVar x =>
adamc@171 1267 let
adamc@171 1268 val t = if SS.member (bound, x) then
adamc@171 1269 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1270 terror)
adamc@171 1271 else
adamc@171 1272 cunif (loc, (L'.KType, loc))
adamc@171 1273 in
adamc@182 1274 (((L'.PVar (x, t), loc), t),
adamc@171 1275 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1276 end
adamc@173 1277 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1278 (env, bound))
adamc@171 1279 | L.PCon ([], x, po) =>
adamc@171 1280 (case E.lookupConstructor env x of
adamc@174 1281 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1282 rerror)
adamc@191 1283 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1284 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1285 (case E.lookupStr env m1 of
adamc@174 1286 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1287 rerror)
adamc@174 1288 | SOME (n, sgn) =>
adamc@174 1289 let
adamc@174 1290 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1291 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1292 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1293 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1294 ((L'.StrVar n, loc), sgn) ms
adamc@174 1295 in
adamc@174 1296 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1297 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1298 rerror)
adamc@191 1299 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1300 end)
adamc@174 1301
adamc@175 1302 | L.PRecord (xps, flex) =>
adamc@175 1303 let
adamc@175 1304 val (xpts, (env, bound, _)) =
adamc@175 1305 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1306 let
adamc@628 1307 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1308 in
adamc@175 1309 if SS.member (fbound, x) then
adamc@175 1310 expError env (DuplicatePatField (loc, x))
adamc@175 1311 else
adamc@175 1312 ();
adamc@175 1313 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1314 end)
adamc@175 1315 (env, bound, SS.empty) xps
adamc@175 1316
adamc@175 1317 val k = (L'.KType, loc)
adamc@175 1318 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1319 val c =
adamc@175 1320 if flex then
adamc@176 1321 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1322 else
adamc@176 1323 c
adamc@175 1324 in
adamc@182 1325 (((L'.PRecord xpts, loc),
adamc@175 1326 (L'.TRecord c, loc)),
adamc@175 1327 (env, bound))
adamc@175 1328 end
adamc@822 1329
adamc@822 1330 | L.PAnnot (p, t) =>
adamc@822 1331 let
adamc@822 1332 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822 1333 val (t', k, _) = elabCon (env, D.empty) t
adamc@822 1334 in
adamc@822 1335 checkPatCon env p' pt t';
adamc@822 1336 ((p', t'), (env, bound))
adamc@822 1337 end
adamc@171 1338 end
adamc@171 1339
adamc@819 1340 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819 1341 fun exhaustive (env, t, ps, loc) =
adamc@819 1342 let
adamc@819 1343 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819 1344
adamc@819 1345 fun patConNum pc =
adamc@819 1346 case pc of
adamc@819 1347 L'.PConVar n => n
adamc@819 1348 | L'.PConProj (m1, ms, x) =>
adamc@819 1349 let
adamc@819 1350 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1351 in
adamc@819 1352 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819 1353 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1354 | SOME (_, n, _, _, _) => n
adamc@819 1355 end
adamc@819 1356
adamc@819 1357 fun nameOfNum (t, n) =
adamc@819 1358 case t of
adamc@819 1359 L'.CModProj (m1, ms, x) =>
adamc@819 1360 let
adamc@819 1361 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1362 in
adamc@819 1363 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1364 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1365 | SOME (_, cons) =>
adamc@819 1366 case ListUtil.search (fn (name, n', _) =>
adamc@819 1367 if n' = n then
adamc@819 1368 SOME name
adamc@819 1369 else
adamc@819 1370 NONE) cons of
adamc@819 1371 NONE => fail 9
adamc@819 1372 | SOME name => L'.PConProj (m1, ms, name)
adamc@819 1373 end
adamc@819 1374 | _ => L'.PConVar n
adamc@819 1375
adamc@819 1376 fun S (args, c, P) =
adamc@819 1377 List.mapPartial
adamc@819 1378 (fn [] => fail 1
adamc@819 1379 | p1 :: ps =>
adamc@819 1380 let
adamc@819 1381 val loc = #2 p1
adamc@819 1382
adamc@819 1383 fun wild () =
adamc@819 1384 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819 1385 in
adamc@819 1386 case #1 p1 of
adamc@819 1387 L'.PPrim _ => NONE
adamc@819 1388 | L'.PCon (_, c', _, NONE) =>
adamc@819 1389 if patConNum c' = c then
adamc@819 1390 SOME ps
adamc@819 1391 else
adamc@819 1392 NONE
adamc@819 1393 | L'.PCon (_, c', _, SOME p) =>
adamc@819 1394 if patConNum c' = c then
adamc@819 1395 SOME (p :: ps)
adamc@819 1396 else
adamc@819 1397 NONE
adamc@819 1398 | L'.PRecord xpts =>
adamc@819 1399 SOME (map (fn x =>
adamc@819 1400 case ListUtil.search (fn (x', p, _) =>
adamc@819 1401 if x = x' then
adamc@819 1402 SOME p
adamc@819 1403 else
adamc@819 1404 NONE) xpts of
adamc@819 1405 NONE => (L'.PWild, loc)
adamc@819 1406 | SOME p => p) args @ ps)
adamc@819 1407 | L'.PWild => wild ()
adamc@819 1408 | L'.PVar _ => wild ()
adamc@819 1409 end)
adamc@819 1410 P
adamc@819 1411
adamc@819 1412 fun D P =
adamc@819 1413 List.mapPartial
adamc@819 1414 (fn [] => fail 2
adamc@819 1415 | (p1, _) :: ps =>
adamc@819 1416 case p1 of
adamc@819 1417 L'.PWild => SOME ps
adamc@819 1418 | L'.PVar _ => SOME ps
adamc@819 1419 | L'.PPrim _ => NONE
adamc@819 1420 | L'.PCon _ => NONE
adamc@819 1421 | L'.PRecord _ => NONE)
adamc@819 1422 P
adamc@819 1423
adamc@819 1424 fun I (P, q) =
adamc@819 1425 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819 1426 ("q", p_list (p_con env) q)];*)
adamc@819 1427 case q of
adamc@819 1428 [] => (case P of
adamc@819 1429 [] => SOME []
adamc@819 1430 | _ => NONE)
adamc@819 1431 | q1 :: qs =>
adamc@819 1432 let
adamc@819 1433 val loc = #2 q1
adamc@819 1434
adamc@819 1435 fun unapp (t, acc) =
adamc@830 1436 case #1 t of
adamc@830 1437 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819 1438 | _ => (t, rev acc)
adamc@819 1439
adamc@830 1440 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830 1441 val t1 = hnormCon env t1
adamc@819 1442 fun doSub t = foldl (fn (arg, t) => subConInCon (0, arg) t) t args
adamc@819 1443
adamc@819 1444 fun dtype (dtO, names) =
adamc@819 1445 let
adamc@819 1446 val nameSet = IS.addList (IS.empty, names)
adamc@819 1447 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819 1448 case ps of
adamc@819 1449 [] => fail 4
adamc@819 1450 | (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819 1451 (IS.delete (nameSet, patConNum pc)
adamc@819 1452 handle NotFound => nameSet)
adamc@819 1453 | _ => nameSet)
adamc@819 1454 nameSet P
adamc@819 1455 in
adamc@819 1456 nameSet
adamc@819 1457 end
adamc@819 1458
adamc@819 1459 fun default () = (NONE, IS.singleton 0, [])
adamc@819 1460
adamc@819 1461 val (dtO, unused, cons) =
adamc@830 1462 case #1 t1 of
adamc@819 1463 L'.CNamed n =>
adamc@819 1464 let
adamc@819 1465 val dt = E.lookupDatatype env n
adamc@819 1466 val cons = E.constructors dt
adamc@819 1467 in
adamc@819 1468 (SOME dt,
adamc@819 1469 dtype (SOME dt, map #2 cons),
adamc@819 1470 map (fn (_, n, co) =>
adamc@819 1471 (n,
adamc@819 1472 case co of
adamc@819 1473 NONE => []
adamc@819 1474 | SOME t => [("", doSub t)])) cons)
adamc@819 1475 end
adamc@819 1476 | L'.CModProj (m1, ms, x) =>
adamc@819 1477 let
adamc@819 1478 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1479 in
adamc@819 1480 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1481 NONE => default ()
adamc@819 1482 | SOME (_, cons) =>
adamc@819 1483 (NONE,
adamc@819 1484 dtype (NONE, map #2 cons),
adamc@819 1485 map (fn (s, _, co) =>
adamc@819 1486 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819 1487 case co of
adamc@819 1488 NONE => []
adamc@819 1489 | SOME t => [("", doSub t)])) cons)
adamc@819 1490 end
adamc@830 1491 | L'.TRecord t =>
adamc@830 1492 (case #1 (hnormCon env t) of
adamc@830 1493 L'.CRecord (_, xts) =>
adamc@830 1494 let
adamc@830 1495 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830 1496 | _ => NONE) xts
adamc@830 1497 in
adamc@830 1498 if List.all Option.isSome xts then
adamc@830 1499 let
adamc@830 1500 val xts = List.mapPartial (fn x => x) xts
adamc@830 1501 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830 1502 String.compare (x1, x2) = GREATER) xts
adamc@830 1503 in
adamc@830 1504 (NONE, IS.empty, [(0, xts)])
adamc@830 1505 end
adamc@830 1506 else
adamc@830 1507 default ()
adamc@830 1508 end
adamc@830 1509 | _ => default ())
adamc@819 1510 | _ => default ()
adamc@819 1511 in
adamc@819 1512 if IS.isEmpty unused then
adamc@819 1513 let
adamc@819 1514 fun recurse cons =
adamc@819 1515 case cons of
adamc@819 1516 [] => NONE
adamc@819 1517 | (name, args) :: cons =>
adamc@819 1518 case I (S (map #1 args, name, P),
adamc@819 1519 map #2 args @ qs) of
adamc@819 1520 NONE => recurse cons
adamc@819 1521 | SOME ps =>
adamc@819 1522 let
adamc@819 1523 val nargs = length args
adamc@819 1524 val argPs = List.take (ps, nargs)
adamc@819 1525 val restPs = List.drop (ps, nargs)
adamc@819 1526
adamc@819 1527 val p = case name of
adamc@819 1528 0 => L'.PRecord (ListPair.map
adamc@819 1529 (fn ((name, t), p) => (name, p, t))
adamc@819 1530 (args, argPs))
adamc@830 1531 | _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819 1532 case argPs of
adamc@819 1533 [] => NONE
adamc@819 1534 | [p] => SOME p
adamc@819 1535 | _ => fail 3)
adamc@819 1536 in
adamc@819 1537 SOME ((p, loc) :: restPs)
adamc@819 1538 end
adamc@819 1539 in
adamc@819 1540 recurse cons
adamc@819 1541 end
adamc@819 1542 else
adamc@819 1543 case I (D P, qs) of
adamc@819 1544 NONE => NONE
adamc@819 1545 | SOME ps =>
adamc@819 1546 let
adamc@819 1547 val p = case cons of
adamc@819 1548 [] => L'.PWild
adamc@819 1549 | (0, _) :: _ => L'.PWild
adamc@819 1550 | _ =>
adamc@819 1551 case IS.find (fn _ => true) unused of
adamc@819 1552 NONE => fail 6
adamc@819 1553 | SOME name =>
adamc@819 1554 case ListUtil.search (fn (name', args) =>
adamc@819 1555 if name = name' then
adamc@819 1556 SOME (name', args)
adamc@819 1557 else
adamc@819 1558 NONE) cons of
adamc@819 1559 SOME (n, []) =>
adamc@830 1560 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819 1561 | SOME (n, [_]) =>
adamc@830 1562 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819 1563 | _ => fail 7
adamc@819 1564 in
adamc@819 1565 SOME ((p, loc) :: ps)
adamc@819 1566 end
adamc@819 1567 end
adamc@819 1568 in
adamc@819 1569 case I (map (fn x => [x]) ps, [t]) of
adamc@819 1570 NONE => NONE
adamc@819 1571 | SOME [p] => SOME p
adamc@819 1572 | _ => fail 7
adamc@819 1573 end
adamc@819 1574
adamc@217 1575 fun unmodCon env (c, loc) =
adamc@217 1576 case c of
adamc@217 1577 L'.CNamed n =>
adamc@217 1578 (case E.lookupCNamed env n of
adamc@217 1579 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1580 | _ => (c, loc))
adamc@217 1581 | L'.CModProj (m1, ms, x) =>
adamc@217 1582 let
adamc@217 1583 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1584 in
adamc@217 1585 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1586 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1587 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1588 | _ => (c, loc)
adamc@217 1589 end
adamc@217 1590 | _ => (c, loc)
adamc@217 1591
adamc@721 1592 fun normClassKey env c =
adamc@467 1593 let
adamc@721 1594 val c = hnormCon env c
adamc@467 1595 in
adamc@467 1596 case #1 c of
adamc@467 1597 L'.CApp (c1, c2) =>
adamc@467 1598 let
adamc@721 1599 val c1 = normClassKey env c1
adamc@721 1600 val c2 = normClassKey env c2
adamc@467 1601 in
adamc@467 1602 (L'.CApp (c1, c2), #2 c)
adamc@467 1603 end
adamc@721 1604 | L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721 1605 normClassKey env c)) xcs), #2 c)
adamc@721 1606 | _ => unmodCon env c
adamc@467 1607 end
adamc@467 1608
adamc@467 1609 fun normClassConstraint env (c, loc) =
adamc@217 1610 case c of
adamc@217 1611 L'.CApp (f, x) =>
adamc@217 1612 let
adamc@721 1613 val f = normClassKey env f
adamc@467 1614 val x = normClassKey env x
adamc@217 1615 in
adamc@467 1616 (L'.CApp (f, x), loc)
adamc@217 1617 end
adamc@674 1618 | L'.TFun (c1, c2) =>
adamc@674 1619 let
adamc@674 1620 val c1 = normClassConstraint env c1
adamc@674 1621 val c2 = normClassConstraint env c2
adamc@674 1622 in
adamc@674 1623 (L'.TFun (c1, c2), loc)
adamc@674 1624 end
adamc@674 1625 | L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adamc@467 1626 | L'.CUnif (_, _, _, ref (SOME c)) => normClassConstraint env c
adamc@721 1627 | _ => unmodCon env (c, loc)
adamc@216 1628
adamc@1093 1629 fun findHead e e' =
adamc@1093 1630 let
adamc@1093 1631 fun findHead (e, _) =
adamc@1093 1632 case e of
adamc@1093 1633 L.EVar (_, _, infer) =>
adamc@1093 1634 let
adamc@1093 1635 fun findHead' (e, _) =
adamc@1093 1636 case e of
adamc@1093 1637 L'.ENamed _ => true
adamc@1093 1638 | L'.EModProj _ => true
adamc@1093 1639 | L'.EApp (e, _) => findHead' e
adamc@1093 1640 | L'.ECApp (e, _) => findHead' e
adamc@1093 1641 | L'.EKApp (e, _) => findHead' e
adamc@1093 1642 | _ => false
adamc@1093 1643 in
adamc@1093 1644 if findHead' e' then
adamc@1093 1645 SOME infer
adamc@1093 1646 else
adamc@1093 1647 NONE
adamc@1093 1648 end
adamc@1093 1649 | L.EApp (e, _) => findHead e
adamc@1093 1650 | L.ECApp (e, _) => findHead e
adamc@1093 1651 | L.EDisjointApp e => findHead e
adamc@1093 1652 | _ => NONE
adamc@1093 1653 in
adamc@1093 1654 findHead e
adamc@1093 1655 end
adamc@1093 1656
adamc@92 1657 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1658 let
adamc@848 1659 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 1660 (*val befor = Time.now ()*)
adamc@280 1661
adamc@280 1662 val r = case e of
adamc@91 1663 L.EAnnot (e, t) =>
adamc@91 1664 let
adamc@91 1665 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1666 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1667 in
adamc@628 1668 checkCon env e' et t';
adamc@628 1669 (e', t', gs1 @ enD gs2)
adamc@91 1670 end
adamc@34 1671
adamc@91 1672 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1673 | L.EVar ([], s, infer) =>
adamc@91 1674 (case E.lookupE env s of
adamc@91 1675 E.NotBound =>
adamc@91 1676 (expError env (UnboundExp (loc, s));
adamc@91 1677 (eerror, cerror, []))
adamc@629 1678 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 1679 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1680 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1681 (case E.lookupStr env m1 of
adamc@91 1682 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1683 (eerror, cerror, []))
adamc@91 1684 | SOME (n, sgn) =>
adamc@91 1685 let
adamc@91 1686 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1687 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1688 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1689 (strerror, sgnerror))
adamc@91 1690 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1691 ((L'.StrVar n, loc), sgn) ms
adamc@10 1692
adamc@91 1693 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1694 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1695 cerror)
adamc@91 1696 | SOME t => t
adamc@91 1697 in
adamc@629 1698 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1699 end)
adamc@86 1700
adamc@349 1701 | L.EWild =>
adamc@210 1702 let
adamc@349 1703 val r = ref NONE
adamc@349 1704 val c = cunif (loc, (L'.KType, loc))
adamc@210 1705 in
adamc@349 1706 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1707 end
adamc@210 1708
adamc@91 1709 | L.EApp (e1, e2) =>
adamc@91 1710 let
adamc@91 1711 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093 1712
adamc@403 1713 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1714
adamc@91 1715 val dom = cunif (loc, ktype)
adamc@91 1716 val ran = cunif (loc, ktype)
adamc@838 1717 val t = (L'.TFun (dom, ran), loc)
adamc@1093 1718
adamc@1093 1719 val () = checkCon env e1' t1 t
adamc@1093 1720 val () = checkCon env e2' t2 dom
adamc@1093 1721
adamc@1093 1722 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093 1723 val (ef, et, gs3) =
adamc@1093 1724 case findHead e1 e1' of
adamc@1093 1725 NONE => (ef, ran, [])
adamc@1093 1726 | SOME infer => elabHead (env, denv) infer ef ran
adamc@91 1727 in
adamc@1093 1728 (ef, et, gs1 @ gs2 @ gs3)
adamc@91 1729 end
adamc@91 1730 | L.EAbs (x, to, e) =>
adamc@91 1731 let
adamc@91 1732 val (t', gs1) = case to of
adamc@91 1733 NONE => (cunif (loc, ktype), [])
adamc@91 1734 | SOME t =>
adamc@91 1735 let
adamc@91 1736 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1737 in
adamc@91 1738 checkKind env t' tk ktype;
adamc@91 1739 (t', gs)
adamc@91 1740 end
adamc@467 1741 val dom = normClassConstraint env t'
adamc@467 1742 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1743 in
adamc@91 1744 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1745 (L'.TFun (t', et), loc),
adamc@467 1746 enD gs1 @ gs2)
adamc@91 1747 end
adamc@91 1748 | L.ECApp (e, c) =>
adamc@91 1749 let
adamc@91 1750 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093 1751
adamc@328 1752 val oldEt = et
adamc@403 1753 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 1754 val (et', _) = hnormCon env et
adamc@91 1755 in
adamc@91 1756 case et' of
adamc@91 1757 L'.CError => (eerror, cerror, [])
adamc@328 1758 | L'.TCFun (_, x, k, eb) =>
adamc@91 1759 let
adamc@91 1760 val () = checkKind env c' ck k
adamc@91 1761 val eb' = subConInCon (0, c') eb
adamc@339 1762 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1763 cerror)
adamc@1093 1764
adamc@1093 1765 val ef = (L'.ECApp (e', c'), loc)
adamc@1093 1766 val (ef, eb', gs3) =
adamc@1093 1767 case findHead e e' of
adamc@1093 1768 NONE => (ef, eb', [])
adamc@1093 1769 | SOME infer => elabHead (env, denv) infer ef eb'
adamc@91 1770 in
adamc@328 1771 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1772 ("et", p_con env oldEt),
adamc@328 1773 ("x", PD.string x),
adamc@328 1774 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1775 ("c", p_con env c'),
adamc@328 1776 ("eb'", p_con env eb')];*)
adamc@1093 1777 (ef, eb', gs1 @ enD gs2 @ gs3)
adamc@91 1778 end
adamc@91 1779
adamc@91 1780 | _ =>
adamc@91 1781 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1782 (eerror, cerror, []))
adamc@91 1783 end
adamc@91 1784 | L.ECAbs (expl, x, k, e) =>
adamc@91 1785 let
adamc@91 1786 val expl' = elabExplicitness expl
adamc@623 1787 val k' = elabKind env k
adamc@328 1788
adamc@328 1789 val env' = E.pushCRel env x k'
adamc@328 1790 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1791 in
adamc@91 1792 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1793 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1794 gs)
adamc@91 1795 end
adamc@623 1796 | L.EKAbs (x, e) =>
adamc@623 1797 let
adamc@623 1798 val env' = E.pushKRel env x
adamc@623 1799 val (e', et, gs) = elabExp (env', denv) e
adamc@623 1800 in
adamc@623 1801 ((L'.EKAbs (x, e'), loc),
adamc@623 1802 (L'.TKFun (x, et), loc),
adamc@623 1803 gs)
adamc@623 1804 end
adamc@91 1805
adamc@91 1806 | L.EDisjoint (c1, c2, e) =>
adamc@91 1807 let
adamc@91 1808 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1809 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1810
adamc@91 1811 val ku1 = kunif loc
adamc@91 1812 val ku2 = kunif loc
adamc@91 1813
adamc@628 1814 val denv' = D.assert env denv (c1', c2')
adamc@628 1815 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 1816 in
adamc@91 1817 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1818 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1819
adamc@628 1820 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 1821 end
adamc@629 1822 | L.EDisjointApp e =>
adamc@629 1823 let
adamc@629 1824 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 1825
adamc@629 1826 val k1 = kunif loc
adamc@629 1827 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629 1828 val k2 = kunif loc
adamc@629 1829 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629 1830 val t' = cunif (loc, ktype)
adamc@629 1831 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 1832 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 1833 in
adamc@629 1834 (e', t', enD gs2 @ gs1)
adamc@629 1835 end
adamc@91 1836
adamc@91 1837 | L.ERecord xes =>
adamc@91 1838 let
adamc@91 1839 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1840 let
adamc@91 1841 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1842 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1843 in
adamc@91 1844 checkKind env x' xk kname;
adamc@228 1845 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1846 end)
adamc@91 1847 [] xes
adamc@91 1848
adamc@91 1849 val k = (L'.KType, loc)
adamc@91 1850
adamc@91 1851 fun prove (xets, gs) =
adamc@91 1852 case xets of
adamc@91 1853 [] => gs
adamc@91 1854 | (x, _, t) :: rest =>
adamc@91 1855 let
adamc@91 1856 val xc = (x, t)
adamc@91 1857 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1858 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1859 let
adamc@91 1860 val xc' = (x', t')
adamc@91 1861 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1862 in
adamc@91 1863 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1864 end)
adamc@91 1865 gs rest
adamc@91 1866 in
adamc@91 1867 prove (rest, gs)
adamc@91 1868 end
adamc@228 1869
adamc@228 1870 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1871 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1872 in
adamc@255 1873 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1874 ((L'.ERecord xes', loc),
adamc@91 1875 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1876 enD (prove (xes', gsD)) @ gsO)
adamc@91 1877 end
adamc@91 1878
adamc@91 1879 | L.EField (e, c) =>
adamc@91 1880 let
adamc@91 1881 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1882 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1883
adamc@91 1884 val ft = cunif (loc, ktype)
adamc@91 1885 val rest = cunif (loc, ktype_record)
adamc@91 1886 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1887 val () = checkCon env e' et
adamc@629 1888 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 1889 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 1890 in
adamc@628 1891 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 1892 end
adamc@91 1893
adamc@445 1894 | L.EConcat (e1, e2) =>
adamc@339 1895 let
adamc@339 1896 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 1897 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 1898
adamc@445 1899 val r1 = cunif (loc, ktype_record)
adamc@445 1900 val r2 = cunif (loc, ktype_record)
adamc@445 1901
adamc@629 1902 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 1903 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 1904
adamc@628 1905 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 1906 in
adamc@445 1907 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 1908 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 1909 gs1 @ gs2 @ enD gs3)
adamc@339 1910 end
adamc@149 1911 | L.ECut (e, c) =>
adamc@149 1912 let
adamc@149 1913 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1914 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1915
adamc@149 1916 val ft = cunif (loc, ktype)
adamc@149 1917 val rest = cunif (loc, ktype_record)
adamc@149 1918 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1919
adamc@629 1920 val () = checkCon env e' et
adamc@629 1921 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1922
adamc@628 1923 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 1924 in
adamc@228 1925 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1926 gs1 @ enD gs2 @ enD gs3)
adamc@149 1927 end
adamc@493 1928 | L.ECutMulti (e, c) =>
adamc@493 1929 let
adamc@493 1930 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 1931 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 1932
adamc@493 1933 val rest = cunif (loc, ktype_record)
adamc@629 1934
adamc@629 1935 val () = checkCon env e' et
adamc@629 1936 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 1937
adamc@628 1938 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 1939 in
adamc@493 1940 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1941 gs1 @ enD gs2 @ enD gs3)
adamc@493 1942 end
adamc@149 1943
adamc@171 1944 | L.ECase (e, pes) =>
adamc@171 1945 let
adamc@171 1946 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1947 val result = cunif (loc, (L'.KType, loc))
adamc@171 1948 val (pes', gs) = ListUtil.foldlMap
adamc@171 1949 (fn ((p, e), gs) =>
adamc@171 1950 let
adamc@628 1951 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 1952
adamc@629 1953 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 1954 in
adamc@628 1955 checkPatCon env p' pt et;
adamc@629 1956 checkCon env e' et' result;
adamc@628 1957 ((p', e'), gs1 @ gs)
adamc@171 1958 end)
adamc@171 1959 gs1 pes
adamc@171 1960 in
adamc@819 1961 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 1962 NONE => ()
adamc@830 1963 | SOME p => if !mayDelay then
adamc@830 1964 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 1965 else
adamc@830 1966 expError env (Inexhaustive (loc, p));
adamc@172 1967
adamc@628 1968 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 1969 end
adamc@447 1970
adamc@447 1971 | L.ELet (eds, e) =>
adamc@447 1972 let
adamc@447 1973 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 1974 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 1975 in
adamc@825 1976 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 1977 end
adamc@280 1978 in
adamc@819 1979 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 1980 r
adamc@91 1981 end
adamc@31 1982
adamc@628 1983 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 1984 let
adamc@447 1985 val r =
adamc@447 1986 case d of
adamc@825 1987 L.EDVal (p, e) =>
adamc@447 1988 let
adamc@825 1989 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 1990 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 1991
adamc@825 1992 val () = checkCon env e' et pt
adamc@825 1993
adamc@825 1994 val pt = normClassConstraint env pt
adamc@447 1995 in
adamc@830 1996 case exhaustive (env, et, [p'], loc) of
adamc@830 1997 NONE => ()
adamc@830 1998 | SOME p => if !mayDelay then
adamc@830 1999 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 2000 else
adamc@830 2001 expError env (Inexhaustive (loc, p));
adamc@830 2002
adamc@825 2003 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 2004 end
adamc@447 2005 | L.EDValRec vis =>
adamc@447 2006 let
adamc@447 2007 fun allowable (e, _) =
adamc@447 2008 case e of
adamc@447 2009 L.EAbs _ => true
adamc@447 2010 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 2011 | L.EKAbs (_, e) => allowable e
adamc@447 2012 | L.EDisjoint (_, _, e) => allowable e
adamc@447 2013 | _ => false
adamc@447 2014
adamc@447 2015 val (vis, gs) = ListUtil.foldlMap
adamc@447 2016 (fn ((x, co, e), gs) =>
adamc@447 2017 let
adamc@447 2018 val (c', _, gs1) = case co of
adamc@447 2019 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 2020 | SOME c => elabCon (env, denv) c
adamc@447 2021 in
adamc@447 2022 ((x, c', e), enD gs1 @ gs)
adamc@447 2023 end) gs vis
adamc@447 2024
adamc@447 2025 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 2026
adamc@447 2027 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 2028 let
adamc@447 2029 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 2030 in
adamc@628 2031 checkCon env e' et c';
adamc@447 2032 if allowable e then
adamc@447 2033 ()
adamc@447 2034 else
adamc@447 2035 expError env (IllegalRec (x, e'));
adamc@628 2036 ((x, c', e'), gs1 @ gs)
adamc@447 2037 end) gs vis
adamc@447 2038 in
adamc@447 2039 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 2040 end
adamc@447 2041 in
adamc@447 2042 r
adamc@447 2043 end
adamc@447 2044
adamc@42 2045 val hnormSgn = E.hnormSgn
adamc@31 2046
adamc@210 2047 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 2048 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 2049 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2050 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2051 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2052 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2053
adamc@469 2054 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2055 case E.lookupStr env str of
adamc@469 2056 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2057 denv)
adamc@469 2058 | SOME (n, sgn) =>
adamc@469 2059 let
adamc@469 2060 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2061 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2062 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2063 (strerror, sgnerror))
adamc@469 2064 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2065 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2066
adamc@1030 2067 fun collect first (st, sgn) =
adamc@1030 2068 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182 2069 NONE => []
adamc@1030 2070 | SOME cs =>
adamc@1030 2071 case #1 (hnormSgn env sgn) of
adamc@1030 2072 L'.SgnConst sgis =>
adamc@1030 2073 foldl (fn (sgi, cs) =>
adamc@1030 2074 case #1 sgi of
adamc@1030 2075 L'.SgiStr (x, _, _) =>
adamc@1030 2076 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2077 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2078 | SOME sgn' =>
adamc@1030 2079 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2080 cs))
adamc@1030 2081 | _ => cs) cs sgis
adamc@1030 2082 | _ => cs
adamc@469 2083 in
adamc@1030 2084 foldl (fn ((c1, c2), denv) =>
adamc@1030 2085 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2086 end
adamc@469 2087
adamc@88 2088 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 2089 case sgi of
adamc@76 2090 L.SgiConAbs (x, k) =>
adamc@76 2091 let
adamc@623 2092 val k' = elabKind env k
adamc@31 2093
adamc@76 2094 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 2095 in
adamc@88 2096 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 2097 end
adamc@31 2098
adamc@76 2099 | L.SgiCon (x, ko, c) =>
adamc@76 2100 let
adamc@76 2101 val k' = case ko of
adamc@76 2102 NONE => kunif loc
adamc@623 2103 | SOME k => elabKind env k
adamc@31 2104
adamc@83 2105 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 2106 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 2107 in
adamc@76 2108 checkKind env c' ck k';
adamc@31 2109
adamc@88 2110 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 2111 end
adamc@31 2112
adamc@805 2113 | L.SgiDatatype dts =>
adamc@157 2114 let
adamc@157 2115 val k = (L'.KType, loc)
adamc@805 2116
adamc@805 2117 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@805 2118 let
adamc@805 2119 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2120 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 2121 in
adamc@805 2122 ((x, n, xs, xcs), env)
adamc@805 2123 end)
adamc@805 2124 env dts
adamc@805 2125
adamc@805 2126 val (dts, env) = ListUtil.foldlMap
adamc@805 2127 (fn ((x, n, xs, xcs), env) =>
adamc@805 2128 let
adamc@805 2129 val t = (L'.CNamed n, loc)
adamc@805 2130 val nxs = length xs - 1
adamc@805 2131 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@805 2132 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 2133
adamc@805 2134 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 2135 (E.pushCRel env' x k,
adamc@805 2136 D.enter denv')) (env, denv) xs
adamc@805 2137
adamc@805 2138 val (xcs, (used, env, gs)) =
adamc@805 2139 ListUtil.foldlMap
adamc@805 2140 (fn ((x, to), (used, env, gs)) =>
adamc@805 2141 let
adamc@805 2142 val (to, t, gs') = case to of
adamc@805 2143 NONE => (NONE, t, gs)
adamc@805 2144 | SOME t' =>
adamc@805 2145 let
adamc@805 2146 val (t', tk, gs') =
adamc@805 2147 elabCon (env', denv') t'
adamc@805 2148 in
adamc@805 2149 checkKind env' t' tk k;
adamc@805 2150 (SOME t',
adamc@805 2151 (L'.TFun (t', t), loc),
adamc@805 2152 gs' @ gs)
adamc@805 2153 end
adamc@805 2154 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@805 2155 t xs
adamc@805 2156
adamc@805 2157 val (env, n') = E.pushENamed env x t
adamc@805 2158 in
adamc@805 2159 if SS.member (used, x) then
adamc@805 2160 strError env (DuplicateConstructor (x, loc))
adamc@805 2161 else
adamc@805 2162 ();
adamc@805 2163 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 2164 end)
adamc@805 2165 (SS.empty, env, []) xcs
adamc@805 2166 in
adamc@805 2167 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@805 2168 end)
adamc@805 2169 env dts
adamc@157 2170 in
adamc@805 2171 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@157 2172 end
adamc@156 2173
adamc@158 2174 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 2175
adamc@158 2176 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 2177 (case E.lookupStr env m1 of
adamc@158 2178 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 2179 ([], (env, denv, gs)))
adamc@158 2180 | SOME (n, sgn) =>
adamc@158 2181 let
adamc@158 2182 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 2183 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 2184 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 2185 (strerror, sgnerror))
adamc@158 2186 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 2187 ((L'.StrVar n, loc), sgn) ms
adamc@158 2188 in
adamc@628 2189 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 2190 (L'.CModProj (n, ms, s), _) =>
adamc@161 2191 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 2192 NONE => (conError env (UnboundDatatype (loc, s));
adamc@628 2193 ([], (env, denv, [])))
adamc@191 2194 | SOME (xs, xncs) =>
adamc@161 2195 let
adamc@161 2196 val k = (L'.KType, loc)
adamc@191 2197 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2198
adamc@161 2199 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 2200 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 2201 val env = E.pushDatatype env n' xs xncs
adamc@158 2202
adamc@161 2203 val t = (L'.CNamed n', loc)
adamc@161 2204 val env = foldl (fn ((x, n, to), env) =>
adamc@161 2205 let
adamc@161 2206 val t = case to of
adamc@161 2207 NONE => t
adamc@161 2208 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 2209
adamc@191 2210 val t = foldr (fn (x, t) =>
adamc@191 2211 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 2212 t xs
adamc@161 2213 in
adamc@161 2214 E.pushENamedAs env x n t
adamc@161 2215 end) env xncs
adamc@161 2216 in
adamc@628 2217 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@161 2218 end)
adamc@161 2219 | _ => (strError env (NotDatatype loc);
adamc@161 2220 ([], (env, denv, [])))
adamc@158 2221 end)
adamc@156 2222
adamc@76 2223 | L.SgiVal (x, c) =>
adamc@76 2224 let
adamc@83 2225 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 2226
adamc@721 2227 val old = c'
adamc@711 2228 val c' = normClassConstraint env c'
adamc@76 2229 val (env', n) = E.pushENamed env x c'
adamc@76 2230 in
adamc@623 2231 (unifyKinds env ck ktype
adamc@706 2232 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@31 2233
adamc@467 2234 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 2235 end
adamc@31 2236
adamc@707 2237 | L.SgiTable (x, c, pe, ce) =>
adamc@706 2238 let
adamc@706 2239 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@706 2240 val x' = x ^ "_hidden_constraints"
adamc@706 2241 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@706 2242 val hidden = (L'.CNamed hidden_n, loc)
adamc@706 2243
adamc@706 2244 val (c', ck, gs') = elabCon (env, denv) c
adamc@707 2245 val pkey = cunif (loc, cstK)
adamc@706 2246 val visible = cunif (loc, cstK)
adamc@706 2247 val uniques = (L'.CConcat (visible, hidden), loc)
adamc@706 2248
adamc@706 2249 val ct = tableOf ()
adamc@706 2250 val ct = (L'.CApp (ct, c'), loc)
adamc@707 2251 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@707 2252
adamc@707 2253 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@707 2254 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2255 | _ => NONE) gs''
adamc@707 2256
adamc@707 2257 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 2258 val pst = (L'.CApp (pst, c'), loc)
adamc@707 2259 val pst = (L'.CApp (pst, pkey), loc)
adamc@706 2260
adamc@706 2261 val (env', n) = E.pushENamed env' x ct
adamc@706 2262
adamc@707 2263 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@707 2264 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2265 | _ => NONE) gs'''
adamc@706 2266
adamc@706 2267 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@706 2268 val cst = (L'.CApp (cst, c'), loc)
adamc@706 2269 val cst = (L'.CApp (cst, visible), loc)
adamc@706 2270 in
adamc@706 2271 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@707 2272 checkCon env' pe' pet pst;
adamc@707 2273 checkCon env' ce' cet cst;
adamc@706 2274
adamc@706 2275 ([(L'.SgiConAbs (x', hidden_n, cstK), loc),
adamc@707 2276 (L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@706 2277 end
adamc@706 2278
adamc@76 2279 | L.SgiStr (x, sgn) =>
adamc@76 2280 let
adamc@83 2281 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2282 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2283 in
adamc@88 2284 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2285 end
adamc@31 2286
adamc@76 2287 | L.SgiSgn (x, sgn) =>
adamc@76 2288 let
adamc@83 2289 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2290 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 2291 in
adamc@88 2292 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2293 end
adamc@31 2294
adamc@76 2295 | L.SgiInclude sgn =>
adamc@76 2296 let
adamc@83 2297 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2298 in
adamc@76 2299 case #1 (hnormSgn env sgn') of
adamc@76 2300 L'.SgnConst sgis =>
adamc@88 2301 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 2302 | _ => (sgnError env (NotIncludable sgn');
adamc@88 2303 ([], (env, denv, [])))
adamc@88 2304 end
adamc@88 2305
adamc@88 2306 | L.SgiConstraint (c1, c2) =>
adamc@88 2307 let
adamc@88 2308 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 2309 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 2310
adamc@628 2311 val denv = D.assert env denv (c1', c2')
adamc@88 2312 in
adamc@88 2313 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 2314 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 2315
adamc@628 2316 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@76 2317 end
adamc@31 2318
adamc@563 2319 | L.SgiClassAbs (x, k) =>
adamc@211 2320 let
adamc@623 2321 val k = elabKind env k
adamc@711 2322 val (env, n) = E.pushCNamed env x k NONE
adamc@211 2323 val env = E.pushClass env n
adamc@211 2324 in
adamc@563 2325 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@211 2326 end
adamc@211 2327
adamc@563 2328 | L.SgiClass (x, k, c) =>
adamc@211 2329 let
adamc@623 2330 val k = elabKind env k
adamc@211 2331 val (c', ck, gs) = elabCon (env, denv) c
adamc@711 2332 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 2333 val env = E.pushClass env n
adamc@211 2334 in
adamc@711 2335 checkKind env c' ck k;
adamc@563 2336 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@211 2337 end
adamc@211 2338
adamc@83 2339 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2340 case sgn of
adamc@31 2341 L.SgnConst sgis =>
adamc@31 2342 let
adamc@88 2343 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2344
adamc@62 2345 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2346 case sgi of
adamc@62 2347 L'.SgiConAbs (x, _, _) =>
adamc@62 2348 (if SS.member (cons, x) then
adamc@62 2349 sgnError env (DuplicateCon (loc, x))
adamc@62 2350 else
adamc@62 2351 ();
adamc@62 2352 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2353 | L'.SgiCon (x, _, _, _) =>
adamc@62 2354 (if SS.member (cons, x) then
adamc@62 2355 sgnError env (DuplicateCon (loc, x))
adamc@62 2356 else
adamc@62 2357 ();
adamc@62 2358 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2359 | L'.SgiDatatype dts =>
adamc@156 2360 let
adamc@805 2361 val (cons, vals) =
adamc@805 2362 let
adamc@805 2363 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2364 let
adamc@805 2365 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2366 (if SS.member (vals, x) then
adamc@805 2367 sgnError env (DuplicateVal (loc, x))
adamc@805 2368 else
adamc@805 2369 ();
adamc@805 2370 SS.add (vals, x)))
adamc@805 2371 vals xncs
adamc@805 2372 in
adamc@805 2373 if SS.member (cons, x) then
adamc@805 2374 sgnError env (DuplicateCon (loc, x))
adamc@805 2375 else
adamc@805 2376 ();
adamc@805 2377 (SS.add (cons, x), vals)
adamc@805 2378 end
adamc@805 2379 in
adamc@805 2380 foldl doOne (cons, vals) dts
adamc@805 2381 end
adamc@156 2382 in
adamc@805 2383 (cons, vals, sgns, strs)
adamc@156 2384 end
adamc@191 2385 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2386 (if SS.member (cons, x) then
adamc@156 2387 sgnError env (DuplicateCon (loc, x))
adamc@156 2388 else
adamc@156 2389 ();
adamc@156 2390 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2391 | L'.SgiVal (x, _, _) =>
adamc@62 2392 (if SS.member (vals, x) then
adamc@62 2393 sgnError env (DuplicateVal (loc, x))
adamc@62 2394 else
adamc@62 2395 ();
adamc@62 2396 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2397 | L'.SgiSgn (x, _, _) =>
adamc@62 2398 (if SS.member (sgns, x) then
adamc@62 2399 sgnError env (DuplicateSgn (loc, x))
adamc@62 2400 else
adamc@62 2401 ();
adamc@62 2402 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2403 | L'.SgiStr (x, _, _) =>
adamc@62 2404 (if SS.member (strs, x) then
adamc@62 2405 sgnError env (DuplicateStr (loc, x))
adamc@62 2406 else
adamc@62 2407 ();
adamc@88 2408 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2409 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2410 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2411 (if SS.member (cons, x) then
adamc@211 2412 sgnError env (DuplicateCon (loc, x))
adamc@211 2413 else
adamc@211 2414 ();
adamc@211 2415 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2416 | L'.SgiClass (x, _, _, _) =>
adamc@211 2417 (if SS.member (cons, x) then
adamc@211 2418 sgnError env (DuplicateCon (loc, x))
adamc@211 2419 else
adamc@211 2420 ();
adamc@460 2421 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2422 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2423 in
adamc@83 2424 ((L'.SgnConst sgis', loc), gs)
adamc@31 2425 end
adamc@31 2426 | L.SgnVar x =>
adamc@31 2427 (case E.lookupSgn env x of
adamc@31 2428 NONE =>
adamc@31 2429 (sgnError env (UnboundSgn (loc, x));
adamc@83 2430 ((L'.SgnError, loc), []))
adamc@83 2431 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2432 | L.SgnFun (m, dom, ran) =>
adamc@41 2433 let
adamc@83 2434 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2435 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2436 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2437 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2438 in
adamc@83 2439 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2440 end
adamc@42 2441 | L.SgnWhere (sgn, x, c) =>
adamc@42 2442 let
adamc@83 2443 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2444 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2445 in
adamc@42 2446 case #1 (hnormSgn env sgn') of
adamc@83 2447 L'.SgnError => (sgnerror, [])
adamc@42 2448 | L'.SgnConst sgis =>
adamc@75 2449 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2450 x' = x andalso
adamc@623 2451 (unifyKinds env k ck
adamc@75 2452 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2453 true)
adamc@42 2454 | _ => false) sgis then
adamc@83 2455 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2456 else
adamc@42 2457 (sgnError env (UnWhereable (sgn', x));
adamc@83 2458 (sgnerror, []))
adamc@42 2459 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2460 (sgnerror, []))
adamc@42 2461 end
adamc@59 2462 | L.SgnProj (m, ms, x) =>
adamc@59 2463 (case E.lookupStr env m of
adamc@59 2464 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2465 (sgnerror, []))
adamc@59 2466 | SOME (n, sgn) =>
adamc@59 2467 let
adamc@59 2468 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2469 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2470 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2471 (strerror, sgnerror))
adamc@59 2472 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2473 ((L'.StrVar n, loc), sgn) ms
adamc@59 2474 in
adamc@59 2475 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2476 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2477 (sgnerror, []))
adamc@83 2478 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2479 end)
adamc@59 2480
adamc@31 2481
adamc@706 2482 and selfify env {str, strs, sgn} =
adamc@66 2483 case #1 (hnormSgn env sgn) of
adamc@66 2484 L'.SgnError => sgn
adamc@66 2485 | L'.SgnVar _ => sgn
adamc@66 2486
adamc@66 2487 | L'.SgnConst sgis =>
adamc@805 2488 (L'.SgnConst (ListUtil.mapConcat (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@805 2489 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2490 | (L'.SgiDatatype dts, loc) =>
adamc@805 2491 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@563 2492 | (L'.SgiClassAbs (x, n, k), loc) =>
adamc@805 2493 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@66 2494 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@805 2495 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adamc@805 2496 | x => [x]) sgis), #2 sgn)
adamc@66 2497 | L'.SgnFun _ => sgn
adamc@66 2498 | L'.SgnWhere _ => sgn
adamc@66 2499 | L'.SgnProj (m, ms, x) =>
adamc@66 2500 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2501 (L'.StrVar m, #2 sgn) ms,
adamc@66 2502 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2503 field = x} of
adamc@66 2504 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2505 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2506
adamc@706 2507 and selfifyAt env {str, sgn} =
adamc@66 2508 let
adamc@66 2509 fun self (str, _) =
adamc@66 2510 case str of
adamc@66 2511 L'.StrVar x => SOME (x, [])
adamc@66 2512 | L'.StrProj (str, x) =>
adamc@66 2513 (case self str of
adamc@66 2514 NONE => NONE
adamc@66 2515 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2516 | _ => NONE
adamc@66 2517 in
adamc@66 2518 case self str of
adamc@66 2519 NONE => sgn
adamc@66 2520 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2521 end
adamc@66 2522
adamc@706 2523 and dopen env {str, strs, sgn} =
adamc@66 2524 let
adamc@66 2525 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2526 (L'.StrVar str, #2 sgn) strs
adamc@66 2527 in
adamc@66 2528 case #1 (hnormSgn env sgn) of
adamc@66 2529 L'.SgnConst sgis =>
adamc@805 2530 ListUtil.foldlMapConcat
adamc@805 2531 (fn ((sgi, loc), env') =>
adamc@805 2532 let
adamc@805 2533 val d =
adamc@805 2534 case sgi of
adamc@805 2535 L'.SgiConAbs (x, n, k) =>
adamc@805 2536 let
adamc@805 2537 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2538 in
adamc@805 2539 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2540 end
adamc@805 2541 | L'.SgiCon (x, n, k, c) =>
adamc@805 2542 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2543 | L'.SgiDatatype dts =>
adamc@805 2544 map (fn (x, n, xs, xncs) => (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@805 2545 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@805 2546 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adamc@805 2547 | L'.SgiVal (x, n, t) =>
adamc@805 2548 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adamc@805 2549 | L'.SgiStr (x, n, sgn) =>
adamc@805 2550 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adamc@805 2551 | L'.SgiSgn (x, n, sgn) =>
adamc@805 2552 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adamc@805 2553 | L'.SgiConstraint (c1, c2) =>
adamc@805 2554 [(L'.DConstraint (c1, c2), loc)]
adamc@805 2555 | L'.SgiClassAbs (x, n, k) =>
adamc@805 2556 let
adamc@805 2557 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2558 in
adamc@805 2559 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2560 end
adamc@805 2561 | L'.SgiClass (x, n, k, _) =>
adamc@805 2562 let
adamc@805 2563 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2564 in
adamc@805 2565 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2566 end
adamc@805 2567 in
adamc@805 2568 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 2569 end)
adamc@805 2570 env sgis
adamc@66 2571 | _ => (strError env (UnOpenable sgn);
adamc@628 2572 ([], env))
adamc@66 2573 end
adamc@66 2574
adamc@706 2575 and sgiOfDecl (d, loc) =
adamc@31 2576 case d of
adamc@123 2577 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2578 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2579 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2580 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2581 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2582 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2583 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2584 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2585 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2586 | L'.DExport _ => []
adamc@707 2587 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 2588 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 2589 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 2590 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 2591 | L'.DView (tn, x, n, _, c) =>
adamc@754 2592 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563 2593 | L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271 2594 | L'.DDatabase _ => []
adamc@460 2595 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 2596 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075 2597 | L'.DTask _ => []
adamc@88 2598
adamc@1000 2599 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 2600 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2601 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2602 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2603 (L'.SgnError, _) => ()
adamc@31 2604 | (_, L'.SgnError) => ()
adamc@31 2605
adamc@31 2606 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2607 let
adamc@362 2608 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2609 ("sgn2", p_sgn env sgn2),
adamc@362 2610 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2611 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2612
adamc@838 2613 fun cpart n = IM.find (!counterparts, n)
adamc@838 2614 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 2615
adamc@838 2616 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 2617 con = fn c =>
adamc@838 2618 case c of
adamc@838 2619 L'.CNamed n2 =>
adamc@838 2620 (case cpart n2 of
adamc@838 2621 NONE => c
adamc@838 2622 | SOME n1 => L'.CNamed n1)
adamc@838 2623 | _ => c}
adamc@838 2624
adamc@628 2625 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 2626 let
adamc@362 2627 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2628
adamc@805 2629 fun seek' f p =
adamc@31 2630 let
adamc@628 2631 fun seek env ls =
adamc@31 2632 case ls of
adamc@805 2633 [] => f env
adamc@31 2634 | h :: t =>
adamc@469 2635 case p (env, h) of
adamc@469 2636 NONE =>
adamc@469 2637 let
adamc@469 2638 val env = case #1 h of
adamc@469 2639 L'.SgiCon (x, n, k, c) =>
adamc@471 2640 if E.checkENamed env n then
adamc@471 2641 env
adamc@471 2642 else
adamc@471 2643 E.pushCNamedAs env x n k (SOME c)
adamc@469 2644 | L'.SgiConAbs (x, n, k) =>
adamc@471 2645 if E.checkENamed env n then
adamc@471 2646 env
adamc@471 2647 else
adamc@471 2648 E.pushCNamedAs env x n k NONE
adamc@469 2649 | _ => env
adamc@469 2650 in
adamc@628 2651 seek (E.sgiBinds env h) t
adamc@469 2652 end
adamc@88 2653 | SOME envs => envs
adamc@31 2654 in
adamc@628 2655 seek env sgis1
adamc@31 2656 end
adamc@805 2657
adamc@1000 2658 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 2659 env))
adamc@31 2660 in
adamc@31 2661 case sgi of
adamc@31 2662 L'.SgiConAbs (x, n2, k2) =>
adamc@469 2663 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31 2664 let
adamc@41 2665 fun found (x', n1, k1, co1) =
adamc@41 2666 if x = x' then
adamc@41 2667 let
adamc@623 2668 val () = unifyKinds env k1 k2
adamc@41 2669 handle KUnify (k1, k2, err) =>
adamc@1000 2670 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2671 sgi2All, k2, err))
adamc@41 2672 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2673 in
adamc@41 2674 SOME (if n1 = n2 then
adamc@41 2675 env
adamc@41 2676 else
adamc@838 2677 (cparts (n2, n1);
adamc@838 2678 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 2679 end
adamc@41 2680 else
adamc@41 2681 NONE
adamc@31 2682 in
adamc@31 2683 case sgi1 of
adamc@41 2684 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2685 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 2686 | L'.SgiDatatype dts =>
adamc@191 2687 let
adamc@191 2688 val k = (L'.KType, loc)
adamc@805 2689
adamc@805 2690 fun search dts =
adamc@805 2691 case dts of
adamc@805 2692 [] => NONE
adamc@805 2693 | (x', n1, xs, _) :: dts =>
adamc@805 2694 let
adamc@805 2695 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2696 in
adamc@805 2697 case found (x', n1, k', NONE) of
adamc@805 2698 NONE => search dts
adamc@805 2699 | x => x
adamc@805 2700 end
adamc@191 2701 in
adamc@805 2702 search dts
adamc@191 2703 end
adamc@191 2704 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2705 let
adamc@191 2706 val k = (L'.KType, loc)
adamc@191 2707 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2708 in
adamc@191 2709 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2710 end
adamc@711 2711 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 2712 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 2713 | _ => NONE
adamc@31 2714 end)
adamc@31 2715
adamc@31 2716 | L'.SgiCon (x, n2, k2, c2) =>
adamc@469 2717 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2718 let
adamc@211 2719 fun found (x', n1, k1, c1) =
adamc@211 2720 if x = x' then
adamc@211 2721 let
adamc@838 2722 val c2 = sub2 c2
adamc@838 2723
adamc@327 2724 fun good () =
adamc@327 2725 let
adamc@327 2726 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2727 val env = if n1 = n2 then
adamc@327 2728 env
adamc@327 2729 else
adamc@839 2730 (cparts (n2, n1);
adamc@839 2731 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 2732 in
adamc@628 2733 SOME env
adamc@327 2734 end
adamc@211 2735 in
adamc@987 2736 (unifyCons env loc c1 c2;
adamc@628 2737 good ())
adamc@211 2738 handle CUnify (c1, c2, err) =>
adamc@1000 2739 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 2740 sgi2All, c2, err));
adamc@211 2741 good ())
adamc@211 2742 end
adamc@211 2743 else
adamc@211 2744 NONE
adamc@211 2745 in
adamc@211 2746 case sgi1 of
adamc@211 2747 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 2748 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2749 | _ => NONE
adamc@211 2750 end)
adamc@31 2751
adamc@805 2752 | L'.SgiDatatype dts2 =>
adamc@805 2753 let
adamc@805 2754 fun found' (sgi1All, (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 2755 if x1 <> x2 then
adamc@805 2756 NONE
adamc@805 2757 else
adamc@805 2758 let
adamc@805 2759 fun mismatched ue =
adamc@1000 2760 (sgnError env (SgiMismatchedDatatypes (strLoc, sgi1All, sgi2All, ue));
adamc@805 2761 SOME env)
adamc@805 2762
adamc@805 2763 val k = (L'.KType, loc)
adamc@805 2764 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 2765
adamc@805 2766 fun good () =
adamc@805 2767 let
adamc@805 2768 val env = E.sgiBinds env sgi1All
adamc@805 2769 val env = if n1 = n2 then
adamc@805 2770 env
adamc@805 2771 else
adamc@838 2772 (cparts (n2, n1);
adamc@838 2773 E.pushCNamedAs env x1 n2 k'
adamc@838 2774 (SOME (L'.CNamed n1, loc)))
adamc@805 2775 in
adamc@805 2776 SOME env
adamc@805 2777 end
adamc@805 2778
adamc@805 2779 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 2780 val env = if n1 = n2 then
adamc@805 2781 env
adamc@805 2782 else
adamc@838 2783 (cparts (n2, n1);
adamc@838 2784 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 2785 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 2786 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 2787 String.compare (x1, x2) <> EQUAL
adamc@805 2788 orelse case (t1, t2) of
adamc@805 2789 (NONE, NONE) => false
adamc@805 2790 | (SOME t1, SOME t2) =>
adamc@987 2791 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 2792 | _ => true
adamc@805 2793 in
adamc@805 2794 (if xs1 <> xs2
adamc@805 2795 orelse length xncs1 <> length xncs2
adamc@805 2796 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 2797 mismatched NONE
adamc@160 2798 else
adamc@805 2799 good ())
adamc@805 2800 handle CUnify ue => mismatched (SOME ue)
adamc@805 2801 end
adamc@805 2802 in
adamc@805 2803 seek'
adamc@805 2804 (fn _ =>
adamc@805 2805 let
adamc@805 2806 fun seekOne (dt2, env) =
adamc@805 2807 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2808 case sgi1 of
adamc@805 2809 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 2810 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 2811 | _ => NONE)
adamc@805 2812
adamc@805 2813 fun seekAll (dts, env) =
adamc@805 2814 case dts of
adamc@805 2815 [] => env
adamc@805 2816 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 2817 in
adamc@805 2818 seekAll (dts2, env)
adamc@805 2819 end)
adamc@805 2820 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2821 let
adamc@805 2822 fun found dts1 =
adamc@805 2823 let
adamc@805 2824 fun iter (dts1, dts2, env) =
adamc@805 2825 case (dts1, dts2) of
adamc@805 2826 ([], []) => SOME env
adamc@805 2827 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 2828 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 2829 NONE => NONE
adamc@805 2830 | SOME env => iter (dts1, dts2, env))
adamc@805 2831 | _ => NONE
adamc@805 2832 in
adamc@805 2833 iter (dts1, dts2, env)
adamc@805 2834 end
adamc@805 2835 in
adamc@805 2836 case sgi1 of
adamc@805 2837 L'.SgiDatatype dts1 => found dts1
adamc@805 2838 | _ => NONE
adamc@805 2839 end)
adamc@805 2840 end
adamc@156 2841
adamc@191 2842 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469 2843 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158 2844 case sgi1 of
adamc@191 2845 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2846 if x = x' then
adamc@158 2847 let
adamc@158 2848 val k = (L'.KType, loc)
adamc@191 2849 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2850 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2851 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2852
adamc@158 2853 fun good () =
adamc@158 2854 let
adamc@191 2855 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2856 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2857 in
adamc@838 2858 cparts (n2, n1);
adamc@628 2859 SOME env
adamc@158 2860 end
adamc@158 2861 in
adamc@987 2862 (unifyCons env loc t1 t2;
adamc@628 2863 good ())
adamc@158 2864 handle CUnify (c1, c2, err) =>
adamc@1000 2865 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@158 2866 good ())
adamc@158 2867 end
adamc@158 2868 else
adamc@158 2869 NONE
adamc@158 2870
adamc@158 2871 | _ => NONE)
adamc@156 2872
adamc@32 2873 | L'.SgiVal (x, n2, c2) =>
adamc@469 2874 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32 2875 case sgi1 of
adamc@41 2876 L'.SgiVal (x', n1, c1) =>
adamc@41 2877 if x = x' then
adamc@838 2878 ((*prefaces "val" [("x", PD.string x),
adamc@838 2879 ("n1", PD.string (Int.toString n1)),
adamc@838 2880 ("c1", p_con env c1),
adamc@838 2881 ("c2", p_con env c2),
adamc@838 2882 ("c2'", p_con env (sub2 c2))];*)
adamc@987 2883 unifyCons env loc c1 (sub2 c2);
adamc@628 2884 SOME env)
adamc@86 2885 handle CUnify (c1, c2, err) =>
adamc@1000 2886 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@628 2887 SOME env)
adamc@41 2888 else
adamc@41 2889 NONE
adamc@32 2890 | _ => NONE)
adamc@32 2891
adamc@33 2892 | L'.SgiStr (x, n2, sgn2) =>
adamc@469 2893 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33 2894 case sgi1 of
adamc@41 2895 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2896 if x = x' then
adamc@66 2897 let
adamc@1000 2898 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@66 2899 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2900 val env = if n1 = n2 then
adamc@66 2901 env
adamc@66 2902 else
adamc@66 2903 E.pushStrNamedAs env x n2
adamc@66 2904 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2905 sgn = sgn2})
adamc@66 2906 in
adamc@628 2907 SOME env
adamc@66 2908 end
adamc@41 2909 else
adamc@41 2910 NONE
adamc@33 2911 | _ => NONE)
adamc@59 2912
adamc@59 2913 | L'.SgiSgn (x, n2, sgn2) =>
adamc@469 2914 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59 2915 case sgi1 of
adamc@59 2916 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2917 if x = x' then
adamc@65 2918 let
adamc@1000 2919 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@1000 2920 val () = subSgn' counterparts env strLoc sgn2 sgn1
adamc@65 2921
adamc@65 2922 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2923 val env = if n1 = n2 then
adamc@65 2924 env
adamc@65 2925 else
adamc@838 2926 (cparts (n2, n1);
adamc@838 2927 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 2928 in
adamc@628 2929 SOME env
adamc@65 2930 end
adamc@59 2931 else
adamc@59 2932 NONE
adamc@59 2933 | _ => NONE)
adamc@88 2934
adamc@88 2935 | L'.SgiConstraint (c2, d2) =>
adamc@469 2936 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88 2937 case sgi1 of
adamc@88 2938 L'.SgiConstraint (c1, d1) =>
adamc@987 2939 if consEq env loc (c1, c2)
adamc@987 2940 andalso consEq env loc (d1, d2) then
adamc@628 2941 SOME env
adamc@88 2942 else
adamc@88 2943 NONE
adamc@88 2944 | _ => NONE)
adamc@203 2945
adamc@563 2946 | L'.SgiClassAbs (x, n2, k2) =>
adamc@469 2947 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2948 let
adamc@563 2949 fun found (x', n1, k1, co) =
adamc@211 2950 if x = x' then
adamc@211 2951 let
adamc@623 2952 val () = unifyKinds env k1 k2
adamc@563 2953 handle KUnify (k1, k2, err) =>
adamc@1000 2954 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2955 sgi2All, k2, err))
adamc@563 2956
adamc@711 2957 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 2958 in
adamc@211 2959 SOME (if n1 = n2 then
adamc@211 2960 env
adamc@211 2961 else
adamc@838 2962 (cparts (n2, n1);
adamc@838 2963 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 2964 end
adamc@211 2965 else
adamc@211 2966 NONE
adamc@211 2967 in
adamc@211 2968 case sgi1 of
adamc@563 2969 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 2970 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 2971 | _ => NONE
adamc@211 2972 end)
adamc@563 2973 | L'.SgiClass (x, n2, k2, c2) =>
adamc@469 2974 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2975 let
adamc@563 2976 fun found (x', n1, k1, c1) =
adamc@211 2977 if x = x' then
adamc@211 2978 let
adamc@623 2979 val () = unifyKinds env k1 k2
adamc@563 2980 handle KUnify (k1, k2, err) =>
adamc@1000 2981 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2982 sgi2All, k2, err))
adamc@563 2983
adamc@838 2984 val c2 = sub2 c2
adamc@838 2985
adamc@218 2986 fun good () =
adamc@218 2987 let
adamc@711 2988 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 2989 val env = if n1 = n2 then
adamc@218 2990 env
adamc@218 2991 else
adamc@839 2992 (cparts (n2, n1);
adamc@839 2993 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 2994 in
adamc@628 2995 SOME env
adamc@218 2996 end
adamc@211 2997 in
adamc@987 2998 (unifyCons env loc c1 c2;
adamc@628 2999 good ())
adamc@211 3000 handle CUnify (c1, c2, err) =>
adamc@1000 3001 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 3002 sgi2All, c2, err));
adamc@211 3003 good ())
adamc@211 3004 end
adamc@211 3005 else
adamc@211 3006 NONE
adamc@211 3007 in
adamc@211 3008 case sgi1 of
adamc@563 3009 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3010 | _ => NONE
adamc@211 3011 end)
adamc@31 3012 end
adamc@31 3013 in
adamc@628 3014 ignore (foldl folder env sgis2)
adamc@31 3015 end
adamc@31 3016
adamc@41 3017 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 3018 let
adamc@480 3019 val ran2 =
adamc@43 3020 if n1 = n2 then
adamc@480 3021 ran2
adamc@43 3022 else
adamc@480 3023 subStrInSgn (n2, n1) ran2
adamc@43 3024 in
adamc@1000 3025 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 3026 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 3027 end
adamc@41 3028
adamc@1000 3029 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 3030
adamc@838 3031 and subSgn env = subSgn' (ref IM.empty) env
adamc@61 3032
adamc@706 3033 and positive self =
adamc@312 3034 let
adamc@312 3035 open L
adamc@312 3036
adamc@312 3037 fun none (c, _) =
adamc@312 3038 case c of
adamc@312 3039 CAnnot (c, _) => none c
adamc@312 3040
adamc@312 3041 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 3042 | TCFun (_, _, _, c) => none c
adamc@312 3043 | TRecord c => none c
adamc@312 3044
adamc@312 3045 | CVar ([], x) => x <> self
adamc@312 3046 | CVar _ => true
adamc@312 3047 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3048 | CAbs _ => false
adamc@628 3049 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3050
adamc@623 3051 | CKAbs _ => false
adamc@623 3052 | TKFun _ => false
adamc@623 3053
adamc@312 3054 | CName _ => true
adamc@312 3055
adamc@312 3056 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3057 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3058 | CMap => true
adamc@312 3059
adamc@312 3060 | CUnit => true
adamc@312 3061
adamc@312 3062 | CTuple cs => List.all none cs
adamc@312 3063 | CProj (c, _) => none c
adamc@312 3064
adamc@312 3065 | CWild _ => false
adamc@312 3066
adamc@312 3067 fun pos (c, _) =
adamc@312 3068 case c of
adamc@312 3069 CAnnot (c, _) => pos c
adamc@312 3070
adamc@312 3071 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3072 | TCFun (_, _, _, c) => pos c
adamc@312 3073 | TRecord c => pos c
adamc@312 3074
adamc@312 3075 | CVar _ => true
adamc@312 3076 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3077 | CAbs _ => false
adamc@628 3078 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3079
adamc@623 3080 | CKAbs _ => false
adamc@623 3081 | TKFun _ => false
adamc@623 3082
adamc@312 3083 | CName _ => true
adamc@312 3084
adamc@312 3085 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3086 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3087 | CMap => true
adamc@312 3088
adamc@312 3089 | CUnit => true
adamc@312 3090
adamc@312 3091 | CTuple cs => List.all pos cs
adamc@312 3092 | CProj (c, _) => pos c
adamc@312 3093
adamc@312 3094 | CWild _ => false
adamc@312 3095 in
adamc@312 3096 pos
adamc@312 3097 end
adamc@312 3098
adamc@706 3099 and wildifyStr env (str, sgn) =
adamc@325 3100 case #1 (hnormSgn env sgn) of
adamc@325 3101 L'.SgnConst sgis =>
adamc@325 3102 (case #1 str of
adamc@325 3103 L.StrConst ds =>
adamc@325 3104 let
adamc@493 3105 fun decompileKind (k, loc) =
adamc@493 3106 case k of
adamc@493 3107 L'.KType => SOME (L.KType, loc)
adamc@493 3108 | L'.KArrow (k1, k2) =>
adamc@493 3109 (case (decompileKind k1, decompileKind k2) of
adamc@493 3110 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3111 | _ => NONE)
adamc@493 3112 | L'.KName => SOME (L.KName, loc)
adamc@493 3113 | L'.KRecord k =>
adamc@493 3114 (case decompileKind k of
adamc@493 3115 SOME k => SOME (L.KRecord k, loc)
adamc@493 3116 | _ => NONE)
adamc@493 3117 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3118 | L'.KTuple ks =>
adamc@493 3119 let
adamc@493 3120 val ks' = List.mapPartial decompileKind ks
adamc@493 3121 in
adamc@493 3122 if length ks' = length ks then
adamc@493 3123 SOME (L.KTuple ks', loc)
adamc@493 3124 else
adamc@493 3125 NONE
adamc@493 3126 end
adamc@493 3127
adamc@493 3128 | L'.KError => NONE
adamc@493 3129 | L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493 3130 | L'.KUnif _ => NONE
adamc@493 3131
adamc@623 3132 | L'.KRel _ => NONE
adamc@623 3133 | L'.KFun _ => NONE
adamc@623 3134
adamc@325 3135 fun decompileCon env (c, loc) =
adamc@325 3136 case c of
adamc@325 3137 L'.CRel i =>
adamc@325 3138 let
adamc@325 3139 val (s, _) = E.lookupCRel env i
adamc@325 3140 in
adamc@325 3141 SOME (L.CVar ([], s), loc)
adamc@325 3142 end
adamc@325 3143 | L'.CNamed i =>
adamc@325 3144 let
adamc@325 3145 val (s, _, _) = E.lookupCNamed env i
adamc@325 3146 in
adamc@325 3147 SOME (L.CVar ([], s), loc)
adamc@325 3148 end
adamc@325 3149 | L'.CModProj (m1, ms, x) =>
adamc@325 3150 let
adamc@325 3151 val (s, _) = E.lookupStrNamed env m1
adamc@325 3152 in
adamc@325 3153 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3154 end
adamc@325 3155 | L'.CName s => SOME (L.CName s, loc)
adamc@325 3156 | L'.CRecord (_, xcs) =>
adamc@325 3157 let
adamc@325 3158 fun fields xcs =
adamc@325 3159 case xcs of
adamc@325 3160 [] => SOME []
adamc@325 3161 | (x, t) :: xcs =>
adamc@325 3162 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3163 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3164 | _ => NONE
adamc@325 3165 in
adamc@325 3166 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 3167 (fields xcs)
adamc@325 3168 end
adamc@325 3169 | L'.CConcat (c1, c2) =>
adamc@325 3170 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3171 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3172 | _ => NONE)
adamc@325 3173 | L'.CUnit => SOME (L.CUnit, loc)
adamc@913 3174 | L'.CUnif (_, _, _, ref (SOME c)) => decompileCon env c
adamc@325 3175
adamc@325 3176 | _ => NONE
adamc@325 3177
adamc@469 3178 val (neededC, constraints, neededV, _) =
adamc@469 3179 foldl (fn ((sgi, loc), (neededC, constraints, neededV, env')) =>
adamc@325 3180 let
adamc@469 3181 val (needed, constraints, neededV) =
adamc@325 3182 case sgi of
adamc@913 3183 L'.SgiCon (x, _, k, c) => (SM.insert (neededC, x, (k, SOME c)),
adamc@913 3184 constraints, neededV)
adamc@913 3185 | L'.SgiConAbs (x, _, k) => (SM.insert (neededC, x, (k, NONE)), constraints, neededV)
adamc@469 3186 | L'.SgiConstraint cs => (neededC, (env', cs, loc) :: constraints, neededV)
adamc@469 3187
adamc@469 3188 | L'.SgiVal (x, _, t) =>
adamc@469 3189 let
adamc@469 3190 fun default () = (neededC, constraints, neededV)
adamc@469 3191
adamc@469 3192 val t = normClassConstraint env' t
adamc@469 3193 in
adamc@469 3194 case #1 t of
adamc@469 3195 L'.CApp (f, _) =>
adamc@634 3196 if isClassOrFolder env' f then
adamc@469 3197 (neededC, constraints, SS.add (neededV, x))
adamc@469 3198 else
adamc@469 3199 default ()
adamc@469 3200 | _ => default ()
adamc@469 3201 end
adamc@469 3202
adamc@469 3203 | _ => (neededC, constraints, neededV)
adamc@325 3204 in
adamc@469 3205 (needed, constraints, neededV, E.sgiBinds env' (sgi, loc))
adamc@325 3206 end)
adamc@493 3207 (SM.empty, [], SS.empty, env) sgis
adamc@325 3208
adamc@634 3209 val (neededC, neededV) =
adamc@634 3210 foldl (fn ((d, _), needed as (neededC, neededV)) =>
adamc@634 3211 case d of
adamc@634 3212 L.DCon (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 3213 handle NotFound =>
adamc@634 3214 needed)
adamc@634 3215 | L.DClass (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 3216 handle NotFound => needed)
adamc@634 3217 | L.DVal (x, _, _) => ((neededC, SS.delete (neededV, x))
adamc@634 3218 handle NotFound => needed)
adamc@634 3219 | L.DOpen _ => (SM.empty, SS.empty)
adamc@634 3220 | _ => needed)
adamc@634 3221 (neededC, neededV) ds
adamc@469 3222
adamc@469 3223 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 3224 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 3225 (SOME c1, SOME c2) =>
adamc@325 3226 SOME (L.DConstraint (c1, c2), loc)
adamc@325 3227 | _ => NONE) constraints
adamc@469 3228
adamc@469 3229 val ds' =
adamc@469 3230 case SS.listItems neededV of
adamc@469 3231 [] => ds'
adamc@469 3232 | xs =>
adamc@469 3233 let
adamc@469 3234 val ewild = (L.EWild, #2 str)
adamc@469 3235 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@469 3236 in
adamc@469 3237 ds'' @ ds'
adamc@469 3238 end
adamc@469 3239
adamc@469 3240 val ds' =
adamc@493 3241 case SM.listItemsi neededC of
adamc@469 3242 [] => ds'
adamc@469 3243 | xs =>
adamc@469 3244 let
adamc@913 3245 val ds'' = map (fn (x, (k, co)) =>
adamc@493 3246 let
adamc@493 3247 val k =
adamc@493 3248 case decompileKind k of
adamc@493 3249 NONE => (L.KWild, #2 str)
adamc@493 3250 | SOME k => k
adamc@913 3251
adamc@493 3252 val cwild = (L.CWild k, #2 str)
adamc@913 3253 val c =
adamc@913 3254 case co of
adamc@913 3255 NONE => cwild
adamc@913 3256 | SOME c =>
adamc@913 3257 case decompileCon env c of
adamc@913 3258 NONE => cwild
adamc@913 3259 | SOME c' => c'
adamc@493 3260 in
adamc@913 3261 (L.DCon (x, NONE, c), #2 str)
adamc@493 3262 end) xs
adamc@469 3263 in
adamc@469 3264 ds'' @ ds'
adamc@469 3265 end
adamc@325 3266 in
adamc@469 3267 (L.StrConst (ds @ ds'), #2 str)
adamc@325 3268 end
adamc@325 3269 | _ => str)
adamc@325 3270 | _ => str
adamc@325 3271
adamc@706 3272 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3273 let
adamc@904 3274 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3275 (*val befor = Time.now ()*)
adamc@255 3276
adamc@255 3277 val r =
adamc@255 3278 case d of
adamc@255 3279 L.DCon (x, ko, c) =>
adamc@255 3280 let
adamc@255 3281 val k' = case ko of
adamc@255 3282 NONE => kunif loc
adamc@623 3283 | SOME k => elabKind env k
adamc@255 3284
adamc@255 3285 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3286 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3287 in
adamc@255 3288 checkKind env c' ck k';
adamc@255 3289
adamc@255 3290 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3291 end
adamc@805 3292 | L.DDatatype dts =>
adamc@255 3293 let
adamc@255 3294 val k = (L'.KType, loc)
adamc@805 3295
adamc@805 3296 val (dts, env) = ListUtil.foldlMap
adamc@805 3297 (fn ((x, xs, xcs), env) =>
adamc@805 3298 let
adamc@805 3299 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3300 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3301 in
adamc@805 3302 ((x, n, xs, xcs), env)
adamc@805 3303 end)
adamc@805 3304 env dts
adamc@805 3305
adamc@805 3306 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3307 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3308 let
adamc@805 3309 val t = (L'.CNamed n, loc)
adamc@805 3310 val nxs = length xs - 1
adamc@805 3311 val t = ListUtil.foldli
adamc@805 3312 (fn (i, _, t) =>
adamc@805 3313 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3314
adamc@805 3315 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3316 (E.pushCRel env' x k,
adamc@805 3317 D.enter denv')) (env, denv) xs
adamc@805 3318
adamc@805 3319 val (xcs, (used, env, gs')) =
adamc@805 3320 ListUtil.foldlMap
adamc@805 3321 (fn ((x, to), (used, env, gs)) =>
adamc@805 3322 let
adamc@805 3323 val (to, t, gs') = case to of
adamc@805 3324 NONE => (NONE, t, gs)
adamc@805 3325 | SOME t' =>
adamc@805 3326 let
adamc@805 3327 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3328 in
adamc@805 3329 checkKind env' t' tk k;
adamc@805 3330 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3331 end
adamc@805 3332 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3333
adamc@805 3334 val (env, n') = E.pushENamed env x t
adamc@805 3335 in
adamc@805 3336 if SS.member (used, x) then
adamc@805 3337 strError env (DuplicateConstructor (x, loc))
adamc@805 3338 else
adamc@805 3339 ();
adamc@805 3340 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3341 end)
adamc@805 3342 (SS.empty, env, gs') xcs
adamc@805 3343 in
adamc@805 3344 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3345 end)
adamc@805 3346 (env, []) dts
adamc@255 3347 in
adamc@805 3348 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3349 end
adamc@255 3350
adamc@255 3351 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3352
adamc@255 3353 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3354 (case E.lookupStr env m1 of
adamc@255 3355 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3356 ([], (env, denv, gs)))
adamc@255 3357 | SOME (n, sgn) =>
adamc@255 3358 let
adamc@255 3359 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3360 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3361 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3362 (strerror, sgnerror))
adamc@255 3363 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3364 ((L'.StrVar n, loc), sgn) ms
adamc@255 3365 in
adamc@628 3366 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3367 (L'.CModProj (n, ms, s), _) =>
adamc@255 3368 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3369 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3370 ([], (env, denv, gs)))
adamc@255 3371 | SOME (xs, xncs) =>
adamc@255 3372 let
adamc@255 3373 val k = (L'.KType, loc)
adamc@255 3374 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3375 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3376 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3377 val env = E.pushDatatype env n' xs xncs
adamc@255 3378
adamc@255 3379 val t = (L'.CNamed n', loc)
adamc@844 3380 val nxs = length xs
adamc@844 3381 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3382 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3383 t xs
adamc@255 3384 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3385 let
adamc@255 3386 val t = case to of
adamc@255 3387 NONE => t
adamc@255 3388 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3389
adamc@255 3390 val t = foldr (fn (x, t) =>
adamc@255 3391 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3392 t xs
adamc@255 3393 in
adamc@255 3394 E.pushENamedAs env x n t
adamc@255 3395 end) env xncs
adamc@255 3396 in
adamc@628 3397 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3398 end)
adamc@255 3399 | _ => (strError env (NotDatatype loc);
adamc@255 3400 ([], (env, denv, [])))
adamc@255 3401 end)
adamc@255 3402
adamc@255 3403 | L.DVal (x, co, e) =>
adamc@255 3404 let
adamc@255 3405 val (c', _, gs1) = case co of
adamc@255 3406 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3407 | SOME c => elabCon (env, denv) c
adamc@255 3408
adamc@255 3409 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3410
adamc@629 3411 val () = checkCon env e' et c'
adamc@629 3412
adamc@674 3413 val c' = normClassConstraint env c'
adamc@255 3414 val (env', n) = E.pushENamed env x c'
adamc@255 3415 in
adamc@255 3416 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3417 ("c'", p_con env c')];*)
adamc@628 3418 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3419 end
adamc@255 3420 | L.DValRec vis =>
adamc@255 3421 let
adamc@255 3422 fun allowable (e, _) =
adamc@255 3423 case e of
adamc@255 3424 L.EAbs _ => true
adamc@255 3425 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3426 | L.EKAbs (_, e) => allowable e
adamc@255 3427 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3428 | _ => false
adamc@255 3429
adamc@255 3430 val (vis, gs) = ListUtil.foldlMap
adamc@255 3431 (fn ((x, co, e), gs) =>
adamc@255 3432 let
adamc@255 3433 val (c', _, gs1) = case co of
adamc@255 3434 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3435 | SOME c => elabCon (env, denv) c
adamc@674 3436 val c' = normClassConstraint env c'
adamc@255 3437 in
adamc@255 3438 ((x, c', e), enD gs1 @ gs)
adamc@280 3439 end) gs vis
adamc@255 3440
adamc@255 3441 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3442 let
adamc@255 3443 val (env, n) = E.pushENamed env x c'
adamc@255 3444 in
adamc@255 3445 ((x, n, c', e), env)
adamc@255 3446 end) env vis
adamc@255 3447
adamc@255 3448 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3449 let
adamc@255 3450 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3451 in
adamc@628 3452 checkCon env e' et c';
adamc@255 3453 if allowable e then
adamc@255 3454 ()
adamc@255 3455 else
adamc@255 3456 expError env (IllegalRec (x, e'));
adamc@628 3457 ((x, n, c', e'), gs1 @ gs)
adamc@255 3458 end) gs vis
adamc@255 3459 in
adamc@255 3460 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 3461 end
adamc@255 3462
adamc@255 3463 | L.DSgn (x, sgn) =>
adamc@255 3464 let
adamc@255 3465 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3466 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3467 in
adamc@255 3468 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3469 end
adamc@255 3470
adamc@255 3471 | L.DStr (x, sgno, str) =>
adamc@255 3472 let
adamc@255 3473 val () = if x = "Basis" then
adamc@255 3474 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3475 else
adamc@255 3476 ()
adamc@255 3477
adamc@255 3478 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3479
adamc@255 3480 val (str', sgn', gs') =
adamc@255 3481 case formal of
adamc@255 3482 NONE =>
adamc@255 3483 let
adamc@255 3484 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3485 in
adamc@255 3486 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3487 end
adamc@255 3488 | SOME (formal, gs1) =>
adamc@255 3489 let
adamc@325 3490 val str = wildifyStr env (str, formal)
adamc@255 3491 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3492 in
adamc@1000 3493 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3494 (str', formal, enD gs1 @ gs2)
adamc@255 3495 end
adamc@255 3496
adamc@255 3497 val (env', n) = E.pushStrNamed env x sgn'
adamc@834 3498 val denv' =
adamc@834 3499 case #1 str' of
adamc@834 3500 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022 3501 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834 3502 | _ => denv
adamc@255 3503 in
adamc@255 3504 case #1 (hnormSgn env sgn') of
adamc@255 3505 L'.SgnFun _ =>
adamc@255 3506 (case #1 str' of
adamc@255 3507 L'.StrFun _ => ()
adamc@255 3508 | _ => strError env (FunctorRebind loc))
adamc@255 3509 | _ => ();
adamc@834 3510 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255 3511 end
adamc@255 3512
adamc@255 3513 | L.DFfiStr (x, sgn) =>
adamc@255 3514 let
adamc@255 3515 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3516
adamc@255 3517 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3518 in
adamc@255 3519 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3520 end
adamc@255 3521
adamc@255 3522 | L.DOpen (m, ms) =>
adamc@255 3523 (case E.lookupStr env m of
adamc@255 3524 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3525 ([], (env, denv, gs)))
adamc@255 3526 | SOME (n, sgn) =>
adamc@255 3527 let
adamc@1030 3528 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 3529 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 3530 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 3531 (strerror, sgnerror))
adamc@1030 3532 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 3533 ((L'.StrVar n, loc), sgn) ms
adamc@1030 3534
adamc@1030 3535 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 3536
adamc@628 3537 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 3538 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 3539 in
adamc@255 3540 (ds, (env', denv', gs))
adamc@255 3541 end)
adamc@255 3542
adamc@255 3543 | L.DConstraint (c1, c2) =>
adamc@255 3544 let
adamc@255 3545 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3546 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3547 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3548
adamc@628 3549 val denv' = D.assert env denv (c1', c2')
adamc@255 3550 in
adamc@255 3551 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3552 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3553
adamc@628 3554 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 3555 end
adamc@255 3556
adamc@255 3557 | L.DOpenConstraints (m, ms) =>
adamc@255 3558 let
adamc@255 3559 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3560 in
adamc@255 3561 ([], (env, denv, gs))
adamc@255 3562 end
adamc@255 3563
adamc@255 3564 | L.DExport str =>
adamc@255 3565 let
adamc@255 3566 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3567
adamc@255 3568 val sgn =
adamc@255 3569 case #1 (hnormSgn env sgn) of
adamc@255 3570 L'.SgnConst sgis =>
adamc@255 3571 let
adamc@255 3572 fun doOne (all as (sgi, _), env) =
adamc@255 3573 (case sgi of
adamc@255 3574 L'.SgiVal (x, n, t) =>
adamc@325 3575 let
adamc@325 3576 fun doPage (makeRes, ran) =
adamc@628 3577 case hnormCon env ran of
adamc@628 3578 (L'.CApp (tf, arg), _) =>
adamc@628 3579 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 3580 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 3581 (L'.CApp (tf, arg3), _)) =>
adamc@325 3582 (case (basis = !basis_r,
adamc@720 3583 hnormCon env tf, hnormCon env arg3) of
adamc@325 3584 (true,
adamc@720 3585 (L'.CApp (tf, arg2), _),
adamc@628 3586 ((L'.CRecord (_, []), _))) =>
adamc@720 3587 (case (hnormCon env tf) of
adamc@720 3588 (L'.CApp (tf, arg1), _) =>
adamc@720 3589 (case (hnormCon env tf,
adamc@720 3590 hnormCon env arg1,
adamc@720 3591 hnormCon env arg2) of
adamc@720 3592 (tf, arg1,
adamc@720 3593 (L'.CRecord (_, []), _)) =>
adamc@720 3594 let
adamc@720 3595 val t = (L'.CApp (tf, arg1), loc)
adamc@720 3596 val t = (L'.CApp (t, arg2), loc)
adamc@720 3597 val t = (L'.CApp (t, arg3), loc)
adamc@720 3598 val t = (L'.CApp (
adamc@720 3599 (L'.CModProj
adamc@720 3600 (basis, [], "transaction"), loc),
adamc@325 3601 t), loc)
adamc@720 3602 in
adamc@720 3603 (L'.SgiVal (x, n, makeRes t), loc)
adamc@720 3604 end
adamc@325 3605 | _ => all)
adamc@325 3606 | _ => all)
adamc@325 3607 | _ => all)
adamc@325 3608 | _ => all)
adamc@325 3609 | _ => all
adamc@325 3610 in
adamc@628 3611 case hnormCon env t of
adamc@628 3612 (L'.TFun (dom, ran), _) =>
adamc@628 3613 (case hnormCon env dom of
adamc@628 3614 (L'.TRecord domR, _) =>
adamc@325 3615 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3616 loc),
adamc@325 3617 t), loc), ran)
adamc@325 3618 | _ => all)
adamc@325 3619 | _ => doPage (fn t => t, t)
adamc@325 3620 end
adamc@255 3621 | _ => all,
adamc@255 3622 E.sgiBinds env all)
adamc@255 3623 in
adamc@255 3624 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3625 end
adamc@255 3626 | _ => sgn
adamc@255 3627 in
adamc@255 3628 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3629 end
adamc@255 3630
adamc@707 3631 | L.DTable (x, c, pe, ce) =>
adamc@255 3632 let
adamc@707 3633 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 3634
adamc@255 3635 val (c', k, gs') = elabCon (env, denv) c
adamc@707 3636 val pkey = cunif (loc, cstK)
adamc@707 3637 val uniques = cunif (loc, cstK)
adamc@705 3638
adamc@705 3639 val ct = tableOf ()
adamc@705 3640 val ct = (L'.CApp (ct, c'), loc)
adamc@707 3641 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 3642
adamc@705 3643 val (env, n) = E.pushENamed env x ct
adamc@707 3644 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 3645 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 3646
adamc@707 3647 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 3648 val pst = (L'.CApp (pst, c'), loc)
adamc@707 3649 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 3650
adamc@704 3651 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 3652 val cst = (L'.CApp (cst, c'), loc)
adamc@705 3653 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 3654 in
adamc@255 3655 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 3656 checkCon env pe' pet pst;
adamc@707 3657 checkCon env ce' cet cst;
adamc@707 3658 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 3659 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 3660 end
adamc@338 3661 | L.DSequence x =>
adamc@338 3662 let
adamc@338 3663 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3664 in
adamc@338 3665 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3666 end
adamc@754 3667 | L.DView (x, e) =>
adamc@754 3668 let
adamc@754 3669 val (e', t, gs') = elabExp (env, denv) e
adamc@754 3670
adamc@754 3671 val k = (L'.KRecord (L'.KType, loc), loc)
adamc@754 3672 val fs = cunif (loc, k)
adamc@754 3673 val ts = cunif (loc, (L'.KRecord k, loc))
adamc@754 3674 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 3675 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 3676 val ts = (L'.CApp (tf, ts), loc)
adamc@754 3677
adamc@754 3678 val cv = viewOf ()
adamc@754 3679 val cv = (L'.CApp (cv, fs), loc)
adamc@754 3680 val (env', n) = E.pushENamed env x cv
adamc@754 3681
adamc@754 3682 val ct = queryOf ()
adamc@1191 3683 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754 3684 val ct = (L'.CApp (ct, ts), loc)
adamc@754 3685 val ct = (L'.CApp (ct, fs), loc)
adamc@754 3686 in
adamc@754 3687 checkCon env e' t ct;
adamc@754 3688 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 3689 (env', denv, gs' @ gs))
adamc@754 3690 end
adamc@255 3691
adamc@563 3692 | L.DClass (x, k, c) =>
adamc@255 3693 let
adamc@623 3694 val k = elabKind env k
adamc@280 3695 val (c', ck, gs') = elabCon (env, denv) c
adamc@711 3696 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3697 val env = E.pushClass env n
adamc@255 3698 in
adamc@711 3699 checkKind env c' ck k;
adamc@563 3700 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3701 end
adamc@271 3702
adamc@280 3703 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3704
adamc@459 3705 | L.DCookie (x, c) =>
adamc@459 3706 let
adamc@459 3707 val (c', k, gs') = elabCon (env, denv) c
adamc@459 3708 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 3709 in
adamc@459 3710 checkKind env c' k (L'.KType, loc);
adamc@459 3711 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 3712 end
adamc@720 3713 | L.DStyle x =>
adamc@718 3714 let
adamc@720 3715 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 3716 in
adamc@720 3717 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 3718 end
adamc@1075 3719 | L.DTask (e1, e2) =>
adamc@1073 3720 let
adamc@1075 3721 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075 3722 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075 3723
adamc@1075 3724 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adamc@1075 3725 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075 3726 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adamc@1073 3727 in
adamc@1075 3728 checkCon env e1' t1 t1';
adamc@1075 3729 checkCon env e2' t2 t2';
adamc@1075 3730 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073 3731 end
adamc@459 3732
adamc@280 3733 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3734 in
adamc@904 3735 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];*)
adamc@255 3736 r
adamc@255 3737 end
adamc@211 3738
adamc@83 3739 and elabStr (env, denv) (str, loc) =
adamc@31 3740 case str of
adamc@31 3741 L.StrConst ds =>
adamc@31 3742 let
adamc@88 3743 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3744 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3745
adamc@63 3746 val (sgis, _, _, _, _) =
adamc@64 3747 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3748 case sgi of
adamc@64 3749 L'.SgiConAbs (x, n, k) =>
adamc@64 3750 let
adamc@64 3751 val (cons, x) =
adamc@64 3752 if SS.member (cons, x) then
adamc@64 3753 (cons, "?" ^ x)
adamc@64 3754 else
adamc@64 3755 (SS.add (cons, x), x)
adamc@64 3756 in
adamc@64 3757 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3758 end
adamc@64 3759 | L'.SgiCon (x, n, k, c) =>
adamc@64 3760 let
adamc@64 3761 val (cons, x) =
adamc@64 3762 if SS.member (cons, x) then
adamc@64 3763 (cons, "?" ^ x)
adamc@64 3764 else
adamc@64 3765 (SS.add (cons, x), x)
adamc@64 3766 in
adamc@64 3767 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3768 end
adamc@805 3769 | L'.SgiDatatype dts =>
adamc@156 3770 let
adamc@805 3771 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 3772 let
adamc@805 3773 val (cons, x) =
adamc@805 3774 if SS.member (cons, x) then
adamc@805 3775 (cons, "?" ^ x)
adamc@156 3776 else
adamc@805 3777 (SS.add (cons, x), x)
adamc@805 3778
adamc@805 3779 val (xncs, vals) =
adamc@805 3780 ListUtil.foldlMap
adamc@805 3781 (fn ((x, n, t), vals) =>
adamc@805 3782 if SS.member (vals, x) then
adamc@805 3783 (("?" ^ x, n, t), vals)
adamc@805 3784 else
adamc@805 3785 ((x, n, t), SS.add (vals, x)))
adamc@805 3786 vals xncs
adamc@805 3787 in
adamc@805 3788 ((x, n, xs, xncs), (cons, vals))
adamc@805 3789 end
adamc@805 3790
adamc@805 3791 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 3792 in
adamc@805 3793 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3794 end
adamc@191 3795 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3796 let
adamc@156 3797 val (cons, x) =
adamc@156 3798 if SS.member (cons, x) then
adamc@156 3799 (cons, "?" ^ x)
adamc@156 3800 else
adamc@156 3801 (SS.add (cons, x), x)
adamc@156 3802 in
adamc@191 3803 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3804 end
adamc@64 3805 | L'.SgiVal (x, n, c) =>
adamc@64 3806 let
adamc@64 3807 val (vals, x) =
adamc@64 3808 if SS.member (vals, x) then
adamc@64 3809 (vals, "?" ^ x)
adamc@64 3810 else
adamc@64 3811 (SS.add (vals, x), x)
adamc@64 3812 in
adamc@64 3813 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3814 end
adamc@64 3815 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3816 let
adamc@64 3817 val (sgns, x) =
adamc@64 3818 if SS.member (sgns, x) then
adamc@64 3819 (sgns, "?" ^ x)
adamc@64 3820 else
adamc@64 3821 (SS.add (sgns, x), x)
adamc@64 3822 in
adamc@64 3823 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3824 end
adamc@64 3825
adamc@64 3826 | L'.SgiStr (x, n, sgn) =>
adamc@64 3827 let
adamc@64 3828 val (strs, x) =
adamc@64 3829 if SS.member (strs, x) then
adamc@64 3830 (strs, "?" ^ x)
adamc@64 3831 else
adamc@64 3832 (SS.add (strs, x), x)
adamc@64 3833 in
adamc@64 3834 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3835 end
adamc@203 3836 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 3837 | L'.SgiClassAbs (x, n, k) =>
adamc@211 3838 let
adamc@211 3839 val (cons, x) =
adamc@211 3840 if SS.member (cons, x) then
adamc@211 3841 (cons, "?" ^ x)
adamc@211 3842 else
adamc@211 3843 (SS.add (cons, x), x)
adamc@211 3844 in
adamc@563 3845 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3846 end
adamc@563 3847 | L'.SgiClass (x, n, k, c) =>
adamc@211 3848 let
adamc@211 3849 val (cons, x) =
adamc@211 3850 if SS.member (cons, x) then
adamc@211 3851 (cons, "?" ^ x)
adamc@211 3852 else
adamc@211 3853 (SS.add (cons, x), x)
adamc@211 3854 in
adamc@563 3855 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3856 end)
adamc@64 3857
adamc@63 3858 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3859 in
adamc@83 3860 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3861 end
adamc@31 3862 | L.StrVar x =>
adamc@31 3863 (case E.lookupStr env x of
adamc@31 3864 NONE =>
adamc@31 3865 (strError env (UnboundStr (loc, x));
adamc@83 3866 (strerror, sgnerror, []))
adamc@83 3867 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3868 | L.StrProj (str, x) =>
adamc@34 3869 let
adamc@83 3870 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3871 in
adamc@34 3872 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3873 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3874 (strerror, sgnerror, []))
adamc@83 3875 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3876 end
adamc@41 3877 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3878 let
adamc@83 3879 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3880 val (env', n) = E.pushStrNamed env m dom'
adamc@834 3881 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 3882 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 3883
adamc@83 3884 val (formal, gs3) =
adamc@41 3885 case ranO of
adamc@83 3886 NONE => (actual, [])
adamc@41 3887 | SOME ran =>
adamc@41 3888 let
adamc@834 3889 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 3890 in
adamc@1000 3891 subSgn env' loc actual ran';
adamc@83 3892 (ran', gs)
adamc@41 3893 end
adamc@41 3894 in
adamc@41 3895 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3896 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3897 enD gs1 @ gs2 @ enD gs3)
adamc@41 3898 end
adamc@44 3899 | L.StrApp (str1, str2) =>
adamc@44 3900 let
adamc@83 3901 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3902 val str2 =
adamc@325 3903 case sgn1 of
adamc@325 3904 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3905 wildifyStr env (str2, dom)
adamc@325 3906 | _ => str2
adamc@83 3907 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3908 in
adamc@44 3909 case #1 (hnormSgn env sgn1) of
adamc@83 3910 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3911 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 3912 (subSgn env loc sgn2 dom;
adamc@44 3913 case #1 (hnormSgn env ran) of
adamc@83 3914 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3915 | L'.SgnConst sgis =>
adamc@44 3916 ((L'.StrApp (str1', str2'), loc),
adamc@83 3917 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3918 gs1 @ gs2)
adamc@44 3919 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3920 | _ => (strError env (NotFunctor sgn1);
adamc@83 3921 (strerror, sgnerror, []))
adamc@44 3922 end
adamc@31 3923
adamc@987 3924 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 3925
adamc@325 3926 fun elabFile basis topStr topSgn env file =
adamc@56 3927 let
adamc@713 3928 val () = mayDelay := true
adamc@713 3929 val () = delayedUnifs := []
adamc@830 3930 val () = delayedExhaustives := []
adamc@713 3931
adamc@83 3932 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3933 val () = case gs of
adamc@83 3934 [] => ()
adamc@207 3935 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3936 prefaces "Unresolved"
adamc@207 3937 [("c1", p_con env c1),
adamc@207 3938 ("c2", p_con env c2)]) gs;
adamc@207 3939 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3940
adamc@56 3941 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3942 val () = basis_r := basis_n
adamc@56 3943
adamc@628 3944 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 3945
adamc@56 3946 fun discoverC r x =
adamc@56 3947 case E.lookupC env' x of
adamc@56 3948 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3949 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3950 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3951
adamc@56 3952 val () = discoverC int "int"
adamc@56 3953 val () = discoverC float "float"
adamc@56 3954 val () = discoverC string "string"
adamc@821 3955 val () = discoverC char "char"
adamc@203 3956 val () = discoverC table "sql_table"
adamc@56 3957
adamc@325 3958 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3959 val () = case gs of
adamc@325 3960 [] => ()
adamc@325 3961 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3962 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3963 val () = case gs of
adamc@325 3964 [] => ()
adamc@329 3965 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3966 (case D.prove env denv (c1, c2, loc) of
adamc@329 3967 [] => ()
adamc@329 3968 | _ =>
adamc@329 3969 (prefaces "Unresolved constraint in top.ur"
adamc@329 3970 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3971 ("c1", p_con env c1),
adamc@720 3972 ("c2", p_con env c2)];
adamc@478 3973 raise Fail "Unresolved constraint in top.ur"))
adamc@564 3974 | TypeClass (env, c, r, loc) =>
adamc@564 3975 let
adamc@564 3976 val c = normClassKey env c
adamc@564 3977 in
adamc@833 3978 case resolveClass env c of
adamc@564 3979 SOME e => r := SOME e
adamc@564 3980 | NONE => expError env (Unresolvable (loc, c))
adamc@634 3981 end) gs
adamc@564 3982
adamc@1000 3983 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720 3984
adamc@325 3985 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633 3986 val () = top_r := top_n
adamc@325 3987
adamc@628 3988 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 3989
adamc@713 3990 val checks = ref ([] : (unit -> unit) list)
adamc@713 3991
adamc@83 3992 fun elabDecl' (d, (env, gs)) =
adamc@76 3993 let
adamc@76 3994 val () = resetKunif ()
adamc@76 3995 val () = resetCunif ()
adamc@88 3996 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3997 in
adamc@713 3998 checks :=
adamc@713 3999 (fn () =>
adamc@713 4000 (if List.exists kunifsInDecl ds then
adamc@713 4001 declError env (KunifsRemain ds)
adamc@713 4002 else
adamc@713 4003 ();
adamc@713 4004
adamc@713 4005 case ListUtil.search cunifsInDecl ds of
adamc@713 4006 NONE => ()
adamc@713 4007 | SOME loc =>
adamc@713 4008 declError env (CunifsRemain ds)))
adamc@713 4009 :: !checks;
adamc@76 4010
adamc@83 4011 (ds, (env, gs))
adamc@76 4012 end
adamc@76 4013
adamc@83 4014 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753 4015
adamc@777 4016 fun oneSummaryRound () =
adamc@777 4017 if ErrorMsg.anyErrors () then
adamc@777 4018 ()
adamc@777 4019 else
adamc@777 4020 let
adamc@777 4021 val delayed = !delayedUnifs
adamc@777 4022 in
adamc@777 4023 delayedUnifs := [];
adamc@777 4024 app (fn (loc, env, k, s1, s2) =>
adamc@777 4025 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 4026 delayed
adamc@777 4027 end
adamc@56 4028 in
adamc@777 4029 oneSummaryRound ();
adamc@753 4030
adamc@753 4031 if ErrorMsg.anyErrors () then
adamc@753 4032 ()
adamc@753 4033 else
adamc@753 4034 let
adamc@753 4035 fun solver gs =
adamc@753 4036 let
adamc@753 4037 val (gs, solved) =
adamc@753 4038 ListUtil.foldlMapPartial
adamc@753 4039 (fn (g, solved) =>
adamc@753 4040 case g of
adamc@753 4041 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 4042 (case D.prove env denv (c1, c2, loc) of
adamc@753 4043 [] => (NONE, true)
adamc@753 4044 | _ => (SOME g, solved))
adamc@753 4045 | TypeClass (env, c, r, loc) =>
adamc@753 4046 let
adamc@753 4047 fun default () = (SOME g, solved)
adamc@753 4048
adamc@753 4049 val c = normClassKey env c
adamc@753 4050 in
adamc@833 4051 case resolveClass env c of
adamc@753 4052 SOME e => (r := SOME e;
adamc@753 4053 (NONE, true))
adamc@753 4054 | NONE =>
adamc@753 4055 case #1 (hnormCon env c) of
adamc@753 4056 L'.CApp (f, x) =>
adamc@753 4057 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753 4058 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753 4059 (case #1 (hnormCon env f) of
adamc@753 4060 L'.CModProj (top_n', [], "folder") =>
adamc@753 4061 if top_n' = top_n then
adamc@753 4062 let
adamc@753 4063 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753 4064 val e = (L'.EKApp (e, k), loc)
adamc@753 4065
adamc@753 4066 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753 4067 let
adamc@753 4068 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753 4069 "cons"), loc)
adamc@753 4070 val e = (L'.EKApp (e, k), loc)
adamc@753 4071 val e = (L'.ECApp (e,
adamc@753 4072 (L'.CRecord (k, xcs),
adamc@753 4073 loc)), loc)
adamc@753 4074 val e = (L'.ECApp (e, x), loc)
adamc@753 4075 val e = (L'.ECApp (e, c), loc)
adamc@753 4076 val e = (L'.EApp (e, folder), loc)
adamc@753 4077 in
adamc@753 4078 (e, (x, c) :: xcs)
adamc@753 4079 end)
adamc@753 4080 (e, []) xcs
adamc@753 4081 in
adamc@753 4082 (r := SOME folder;
adamc@753 4083 (NONE, true))
adamc@753 4084 end
adamc@753 4085 else
adamc@753 4086 default ()
adamc@753 4087 | _ => default ())
adamc@753 4088 | _ => default ())
adamc@753 4089 | _ => default ()
adamc@753 4090 end)
adamc@753 4091 false gs
adamc@753 4092 in
adamc@753 4093 case (gs, solved) of
adamc@753 4094 ([], _) => ()
adamc@777 4095 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4096 | _ =>
adamc@753 4097 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@1048 4098 let
adamc@1048 4099 val c1' = ElabOps.hnormCon env c1
adamc@1048 4100 val c2' = ElabOps.hnormCon env c2
adamc@1048 4101
adamc@1048 4102 fun isUnif (c, _) =
adamc@1048 4103 case c of
adamc@1048 4104 L'.CUnif _ => true
adamc@1048 4105 | _ => false
adamc@1048 4106
adamc@1048 4107 fun maybeAttr (c, _) =
adamc@1048 4108 case c of
adamc@1048 4109 L'.CRecord ((L'.KType, _), xts) => true
adamc@1048 4110 | _ => false
adamc@1048 4111 in
adamc@1048 4112 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@1048 4113 eprefaces' [("Con 1", p_con env c1),
adamc@1048 4114 ("Con 2", p_con env c2),
adamc@1048 4115 ("Hnormed 1", p_con env c1'),
adamc@1048 4116 ("Hnormed 2", p_con env c2')];
adamc@1048 4117
adamc@1048 4118 if (isUnif c1' andalso maybeAttr c2')
adamc@1048 4119 orelse (isUnif c2' andalso maybeAttr c1') then
adamc@1048 4120 TextIO.output (TextIO.stdErr,
adamc@1048 4121 "You may be using a disallowed attribute with an HTML tag.\n")
adamc@1048 4122 else
adamc@1048 4123 ()
adamc@1048 4124 end
adamc@753 4125 | TypeClass (env, c, r, loc) =>
adamc@753 4126 expError env (Unresolvable (loc, c)))
adamc@753 4127 gs
adamc@753 4128 end
adamc@753 4129 in
adamc@753 4130 solver gs
adamc@753 4131 end;
adamc@753 4132
adamc@713 4133 mayDelay := false;
adamc@713 4134
adamc@777 4135 if ErrorMsg.anyErrors () then
adamc@777 4136 ()
adamc@777 4137 else
adamc@777 4138 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4139 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777 4140 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adamc@777 4141 cunifyError env err))
adamc@777 4142 (!delayedUnifs);
adamc@777 4143 delayedUnifs := []);
adamc@713 4144
adamc@713 4145 if ErrorMsg.anyErrors () then
adamc@713 4146 ()
adamc@713 4147 else
adamc@750 4148 app (fn f => f ()) (!checks);
adamc@750 4149
adamc@830 4150 if ErrorMsg.anyErrors () then
adamc@830 4151 ()
adamc@830 4152 else
adamc@837 4153 app (fn all as (env, _, _, loc) =>
adamc@830 4154 case exhaustive all of
adamc@830 4155 NONE => ()
adamc@830 4156 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4157 (!delayedExhaustives);
adamc@830 4158
adamc@799 4159 (*preface ("file", p_file env' file);*)
adamc@799 4160
adamc@325 4161 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4162 :: ds
adamc@325 4163 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4164 :: ds' @ file
adamc@56 4165 end
adamc@2 4166
adamc@2 4167 end