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annotate src/elaborate.sml @ 1071:26197c957ad6

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Better record summary error messages; more tweaking SQL usability
author Adam Chlipala <adamc@hcoop.net>
date Sun, 13 Dec 2009 11:28:47 -0500
parents 38411c2cd363
children b2311dfb3158
rev   line source
adamc@412 1 (* Copyright (c) 2008, 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@403 696 | _ => false
adamc@403 697
adamc@777 698 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403 699 let
adamc@848 700 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@848 701 ("#1", p_summary env s1),
adamc@848 702 ("#2", p_summary env s2)]*)
adamc@403 703
adamc@403 704 fun eatMatching p (ls1, ls2) =
adamc@403 705 let
adamc@403 706 fun em (ls1, ls2, passed1) =
adamc@403 707 case ls1 of
adamc@403 708 [] => (rev passed1, ls2)
adamc@403 709 | h1 :: t1 =>
adamc@403 710 let
adamc@403 711 fun search (ls2', passed2) =
adamc@403 712 case ls2' of
adamc@403 713 [] => em (t1, ls2, h1 :: passed1)
adamc@403 714 | h2 :: t2 =>
adamc@403 715 if p (h1, h2) then
adamc@403 716 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 717 else
adamc@403 718 search (t2, h2 :: passed2)
adamc@403 719 in
adamc@403 720 search (ls2, [])
adamc@403 721 end
adamc@403 722 in
adamc@403 723 em (ls1, ls2, [])
adamc@403 724 end
adamc@403 725
adamc@403 726 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 727 not (consNeq env (x1, x2))
adamc@987 728 andalso consEq env loc (c1, c2)
adamc@987 729 andalso consEq env loc (x1, x2))
adamc@403 730 (#fields s1, #fields s2)
adamc@403 731 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 732 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 733
adamc@403 734 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 735
adamc@987 736 val (others1, others2) = eatMatching (consEq env loc) (#others s1, #others s2)
adamc@403 737 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 738 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 739
adamc@709 740 fun unsummarize {fields, unifs, others} =
adamc@709 741 let
adamc@709 742 val c = (L'.CRecord (k, fields), loc)
adamc@709 743
adamc@709 744 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709 745 c unifs
adamc@709 746 in
adamc@709 747 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709 748 c others
adamc@709 749 end
adamc@709 750
adamc@710 751 val empties = ([], [], [], [], [], [])
adamc@710 752
adamc@709 753 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709 754 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@709 755 orig as ([(_, r)], [], [], _, _, _) =>
adamc@709 756 let
adamc@709 757 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709 758 in
adamc@709 759 if occursCon r c then
adamc@709 760 orig
adamc@709 761 else
adamc@709 762 (r := SOME c;
adamc@710 763 empties)
adamc@709 764 end
adamc@709 765 | orig as (_, _, _, [(_, r)], [], []) =>
adamc@709 766 let
adamc@709 767 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709 768 in
adamc@709 769 if occursCon r c then
adamc@709 770 orig
adamc@709 771 else
adamc@709 772 (r := SOME c;
adamc@710 773 empties)
adamc@709 774 end
adamc@710 775 | orig as ([(_, r1 as ref NONE)], _, [], [(_, r2 as ref NONE)], _, []) =>
adamc@710 776 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710 777 let
adamc@838 778 val kr = (L'.KRecord k, loc)
adamc@710 779 val u = cunif (loc, kr)
adamc@710 780 in
adamc@710 781 r1 := SOME (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc);
adamc@710 782 r2 := SOME (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc);
adamc@710 783 empties
adamc@710 784 end
adamc@710 785 else
adamc@710 786 orig
adamc@709 787 | orig => orig
adamc@709 788
adamc@403 789 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777 790 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 791
adamc@753 792 fun isGuessable (other, fs, unifs) =
adamc@753 793 let
adamc@753 794 val c = (L'.CRecord (k, fs), loc)
adamc@753 795 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753 796 in
adamc@987 797 (guessMap env loc (other, c, GuessFailure);
adamc@753 798 true)
adamc@753 799 handle GuessFailure => false
adamc@753 800 end
adamc@403 801
adamc@754 802 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753 803 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753 804 ([], _, [other1], [], [], _) =>
adamc@753 805 if isGuessable (other1, fs2, unifs2) then
adamc@754 806 ([], [], [], [], [], [])
adamc@403 807 else
adamc@754 808 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753 809 | (_, [], [], [other2], _, []) =>
adamc@777 810 if isGuessable (other2, fs1, unifs1) then
adamc@777 811 ([], [], [], [], [], [])
adamc@777 812 else
adamc@777 813 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754 814 | _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403 815
adamc@403 816 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 817 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 818
adamc@838 819 val empty = (L'.CRecord (k, []), loc)
adamc@1071 820 fun failure () =
adamc@1071 821 let
adamc@1071 822 val fs2 = #fields s2
adamc@1071 823
adamc@1071 824 fun findPointwise fs1 =
adamc@1071 825 case fs1 of
adamc@1071 826 [] => NONE
adamc@1071 827 | (nm1, c1) :: fs1 =>
adamc@1071 828 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071 829 NONE => findPointwise fs1
adamc@1071 830 | SOME (_, c2) =>
adamc@1071 831 if consEq env loc (c1, c2) then
adamc@1071 832 findPointwise fs1
adamc@1071 833 else
adamc@1071 834 SOME (nm1, c1, c2)
adamc@1071 835 in
adamc@1071 836 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071 837 end
adamc@709 838 in
adamc@777 839 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777 840 (_, [], [], [], [], []) =>
adamc@777 841 app (fn (_, r) => r := SOME empty) unifs1
adamc@777 842 | ([], [], [], _, [], []) =>
adamc@777 843 app (fn (_, r) => r := SOME empty) unifs2
adamc@777 844 | _ =>
adamc@777 845 if !mayDelay then
adamc@777 846 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adamc@777 847 else
adamc@777 848 failure ())
adamc@777 849
adamc@777 850 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777 851 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403 852 end
adamc@403 853
adamc@987 854 and guessMap env loc (c1, c2, ex) =
adamc@403 855 let
adamc@621 856 fun unfold (dom, ran, f, r, c) =
adamc@403 857 let
adamc@621 858 fun unfold (r, c) =
adamc@754 859 case #1 (hnormCon env c) of
adamc@987 860 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628 861 | L'.CRecord (_, [(x, v)]) =>
adamc@628 862 let
adamc@628 863 val v' = case dom of
adamc@628 864 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628 865 | _ => cunif (loc, dom)
adamc@628 866 in
adamc@987 867 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987 868 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 869 end
adamc@628 870 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 871 let
adamc@628 872 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 873 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 874 in
adamc@628 875 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 876 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987 877 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 878 end
adamc@628 879 | L'.CConcat (c1', c2') =>
adamc@628 880 let
adamc@628 881 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 882 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 883 in
adamc@628 884 unfold (r1, c1');
adamc@628 885 unfold (r2, c2');
adamc@987 886 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 887 end
adamc@754 888 | L'.CUnif (_, _, _, ur) =>
adamc@777 889 ur := SOME (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adamc@628 890 | _ => raise ex
adamc@403 891 in
adamc@621 892 unfold (r, c)
adamc@403 893 end
adamc@632 894 handle _ => raise ex
adamc@403 895 in
adamc@403 896 case (#1 c1, #1 c2) of
adamc@621 897 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 898 unfold (dom, ran, f, r, c2)
adamc@621 899 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 900 unfold (dom, ran, f, r, c1)
adamc@403 901 | _ => raise ex
adamc@403 902 end
adamc@403 903
adamc@987 904 and unifyCons' env loc c1 c2 =
adamc@628 905 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 906 ()
adamc@628 907 else
adamc@403 908 let
adamc@628 909 (*val befor = Time.now ()
adamc@628 910 val old1 = c1
adamc@628 911 val old2 = c2*)
adamc@628 912 val c1 = hnormCon env c1
adamc@628 913 val c2 = hnormCon env c2
adamc@403 914 in
adamc@987 915 unifyCons'' env loc c1 c2
adamc@987 916 handle ex => guessMap env loc (c1, c2, ex)
adamc@403 917 end
adamc@628 918
adamc@987 919 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403 920 let
adamc@403 921 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 922
adamc@706 923 fun projSpecial1 (c1, n1, onFail) =
adamc@403 924 let
adamc@632 925 fun trySnd () =
adamc@632 926 case #1 (hnormCon env c2All) of
adamc@632 927 L'.CProj (c2, n2) =>
adamc@632 928 let
adamc@632 929 fun tryNormal () =
adamc@632 930 if n1 = n2 then
adamc@987 931 unifyCons' env loc c1 c2
adamc@632 932 else
adamc@706 933 onFail ()
adamc@632 934 in
adamc@632 935 case #1 (hnormCon env c2) of
adamc@632 936 L'.CUnif (_, k, _, r) =>
adamc@632 937 (case #1 (hnormKind k) of
adamc@632 938 L'.KTuple ks =>
adamc@632 939 let
adamc@632 940 val loc = #2 c2
adamc@632 941 val us = map (fn k => cunif (loc, k)) ks
adamc@632 942 in
adamc@632 943 r := SOME (L'.CTuple us, loc);
adamc@987 944 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632 945 end
adamc@632 946 | _ => tryNormal ())
adamc@632 947 | _ => tryNormal ()
adamc@632 948 end
adamc@706 949 | _ => onFail ()
adamc@403 950 in
adamc@632 951 case #1 (hnormCon env c1) of
adamc@632 952 L'.CUnif (_, k, _, r) =>
adamc@632 953 (case #1 (hnormKind k) of
adamc@632 954 L'.KTuple ks =>
adamc@632 955 let
adamc@632 956 val loc = #2 c1
adamc@632 957 val us = map (fn k => cunif (loc, k)) ks
adamc@632 958 in
adamc@632 959 r := SOME (L'.CTuple us, loc);
adamc@987 960 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632 961 end
adamc@632 962 | _ => trySnd ())
adamc@632 963 | _ => trySnd ()
adamc@403 964 end
adamc@632 965
adamc@706 966 fun projSpecial2 (c2, n2, onFail) =
adamc@706 967 case #1 (hnormCon env c2) of
adamc@706 968 L'.CUnif (_, k, _, r) =>
adamc@706 969 (case #1 (hnormKind k) of
adamc@706 970 L'.KTuple ks =>
adamc@706 971 let
adamc@706 972 val loc = #2 c2
adamc@706 973 val us = map (fn k => cunif (loc, k)) ks
adamc@706 974 in
adamc@706 975 r := SOME (L'.CTuple us, loc);
adamc@987 976 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706 977 end
adamc@706 978 | _ => onFail ())
adamc@706 979 | _ => onFail ()
adamc@706 980
adamc@777 981 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706 982
adamc@706 983 fun isRecord () =
adamc@706 984 case (c1, c2) of
adamc@706 985 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706 986 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706 987 | _ => isRecord' ()
adamc@706 988 in
adamc@706 989 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@706 990 ("c2All", p_con env c2All)];*)
adamc@706 991
adamc@706 992 case (c1, c2) of
adamc@706 993 (L'.CError, _) => ()
adamc@706 994 | (_, L'.CError) => ()
adamc@403 995
adamc@705 996 | (L'.CRecord _, _) => isRecord ()
adamc@705 997 | (_, L'.CRecord _) => isRecord ()
adamc@705 998 | (L'.CConcat _, _) => isRecord ()
adamc@705 999 | (_, L'.CConcat _) => isRecord ()
adamc@705 1000
adamc@705 1001 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@705 1002 if r1 = r2 then
adamc@705 1003 ()
adamc@705 1004 else
adamc@705 1005 (unifyKinds env k1 k2;
adamc@705 1006 r1 := SOME c2All)
adamc@705 1007
adamc@705 1008 | (L'.CUnif (_, _, _, r), _) =>
adamc@705 1009 if occursCon r c2All then
adamc@705 1010 err COccursCheckFailed
adamc@705 1011 else
adamc@705 1012 r := SOME c2All
adamc@705 1013 | (_, L'.CUnif (_, _, _, r)) =>
adamc@705 1014 if occursCon r c1All then
adamc@705 1015 err COccursCheckFailed
adamc@705 1016 else
adamc@705 1017 r := SOME c1All
adamc@705 1018
adamc@705 1019 | (L'.CUnit, L'.CUnit) => ()
adamc@705 1020
adamc@705 1021 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987 1022 (unifyCons' env loc d1 d2;
adamc@987 1023 unifyCons' env loc r1 r2)
adamc@705 1024 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705 1025 if expl1 <> expl2 then
adamc@705 1026 err CExplicitness
adamc@705 1027 else
adamc@705 1028 (unifyKinds env d1 d2;
adamc@705 1029 let
adamc@705 1030 (*val befor = Time.now ()*)
adamc@705 1031 val env' = E.pushCRel env x1 d1
adamc@705 1032 in
adamc@705 1033 (*TextIO.print ("E.pushCRel: "
adamc@705 1034 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705 1035 ^ "\n");*)
adamc@987 1036 unifyCons' env' loc r1 r2
adamc@705 1037 end)
adamc@987 1038 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705 1039 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987 1040 (unifyCons' env loc c1 c2;
adamc@987 1041 unifyCons' env loc d1 d2;
adamc@987 1042 unifyCons' env loc e1 e2)
adamc@705 1043
adamc@705 1044 | (L'.CRel n1, L'.CRel n2) =>
adamc@705 1045 if n1 = n2 then
adamc@705 1046 ()
adamc@705 1047 else
adamc@705 1048 err CIncompatible
adamc@705 1049 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@705 1050 if n1 = n2 then
adamc@705 1051 ()
adamc@705 1052 else
adamc@705 1053 err CIncompatible
adamc@705 1054
adamc@705 1055 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987 1056 (unifyCons' env loc d1 d2;
adamc@987 1057 unifyCons' env loc r1 r2)
adamc@705 1058 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705 1059 (unifyKinds env k1 k2;
adamc@987 1060 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705 1061
adamc@705 1062 | (L'.CName n1, L'.CName n2) =>
adamc@705 1063 if n1 = n2 then
adamc@705 1064 ()
adamc@705 1065 else
adamc@705 1066 err CIncompatible
adamc@705 1067
adamc@705 1068 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705 1069 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705 1070 ()
adamc@705 1071 else
adamc@705 1072 err CIncompatible
adamc@705 1073
adamc@705 1074 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987 1075 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705 1076 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705 1077
adamc@706 1078 | (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706 1079 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706 1080
adamc@623 1081 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1082 (unifyKinds env dom1 dom2;
adamc@628 1083 unifyKinds env ran1 ran2)
adamc@623 1084
adamc@623 1085 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987 1086 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623 1087 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1088 (unifyKinds env k1 k2;
adamc@987 1089 unifyCons' env loc c1 c2)
adamc@623 1090 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987 1091 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628 1092
adamc@403 1093 | _ => err CIncompatible
adamc@403 1094 end
adamc@403 1095
adamc@987 1096 and unifyCons env loc c1 c2 =
adamc@987 1097 unifyCons' env loc c1 c2
adamc@403 1098 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 1099 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 1100
adamc@628 1101 fun checkCon env e c1 c2 =
adamc@987 1102 unifyCons env (#2 e) c1 c2
adamc@403 1103 handle CUnify (c1, c2, err) =>
adamc@628 1104 expError env (Unify (e, c1, c2, err))
adamc@628 1105
adamc@628 1106 fun checkPatCon env p c1 c2 =
adamc@987 1107 unifyCons env (#2 p) c1 c2
adamc@403 1108 handle CUnify (c1, c2, err) =>
adamc@628 1109 expError env (PatUnify (p, c1, c2, err))
adamc@71 1110
adamc@403 1111 fun primType env p =
adamc@403 1112 case p of
adamc@403 1113 P.Int _ => !int
adamc@403 1114 | P.Float _ => !float
adamc@403 1115 | P.String _ => !string
adamc@821 1116 | P.Char _ => !char
adamc@623 1117
adamc@403 1118 datatype constraint =
adamc@403 1119 Disjoint of D.goal
adamc@403 1120 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1121
adamc@403 1122 val enD = map Disjoint
adamc@403 1123
adamc@634 1124 fun isClassOrFolder env cl =
adamc@634 1125 E.isClass env cl
adamc@634 1126 orelse case hnormCon env cl of
adamc@634 1127 (L'.CKApp (cl, _), _) =>
adamc@634 1128 (case hnormCon env cl of
adamc@634 1129 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1130 | _ => false)
adamc@634 1131 | _ => false
adamc@634 1132
adamc@629 1133 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1134 let
adamc@898 1135 fun unravelKind (t, e) =
adamc@898 1136 case hnormCon env t of
adamc@898 1137 (L'.TKFun (x, t'), _) =>
adamc@898 1138 let
adamc@898 1139 val u = kunif loc
adamc@898 1140
adamc@898 1141 val t'' = subKindInCon (0, u) t'
adamc@898 1142 in
adamc@898 1143 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898 1144 end
adamc@898 1145 | t => (e, t, [])
adamc@898 1146
adamc@403 1147 fun unravel (t, e) =
adamc@628 1148 case hnormCon env t of
adamc@628 1149 (L'.TKFun (x, t'), _) =>
adamc@628 1150 let
adamc@628 1151 val u = kunif loc
adamc@628 1152
adamc@628 1153 val t'' = subKindInCon (0, u) t'
adamc@628 1154 in
adamc@628 1155 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1156 end
adamc@628 1157 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1158 let
adamc@628 1159 val u = cunif (loc, k)
adamc@628 1160
adamc@628 1161 val t'' = subConInCon (0, u) t'
adamc@628 1162 in
adamc@628 1163 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1164 end
adamc@633 1165 | (L'.TFun (dom, ran), _) =>
adamc@628 1166 let
adamc@633 1167 fun default () = (e, t, [])
adamc@750 1168
adamc@750 1169 fun isInstance () =
adamc@750 1170 if infer <> L.TypesOnly then
adamc@750 1171 let
adamc@750 1172 val r = ref NONE
adamc@750 1173 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750 1174 in
adamc@750 1175 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750 1176 end
adamc@750 1177 else
adamc@750 1178 default ()
adamc@750 1179
adamc@750 1180 fun hasInstance c =
adamc@753 1181 case hnormCon env c of
adamc@753 1182 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753 1183 con = fn c =>
adamc@753 1184 E.isClass env (hnormCon env (c, loc))} c
adamc@753 1185 | c =>
adamc@750 1186 let
adamc@753 1187 fun findHead c =
adamc@753 1188 case #1 c of
adamc@753 1189 L'.CApp (f, _) => findHead f
adamc@753 1190 | _ => c
adamc@753 1191
adamc@753 1192 val cl = hnormCon env (findHead c)
adamc@750 1193 in
adamc@750 1194 isClassOrFolder env cl
adamc@750 1195 end
adamc@628 1196 in
adamc@750 1197 if hasInstance dom then
adamc@750 1198 isInstance ()
adamc@750 1199 else
adamc@750 1200 default ()
adamc@628 1201 end
adamc@629 1202 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1203 if infer <> L.TypesOnly then
adamc@629 1204 let
adamc@792 1205 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629 1206 val (e, t, gs') = unravel (t', e)
adamc@629 1207 in
adamc@629 1208 (e, t, enD gs @ gs')
adamc@629 1209 end
adamc@629 1210 else
adamc@629 1211 (e, t, [])
adamc@628 1212 | t => (e, t, [])
adamc@704 1213 in
adamc@704 1214 case infer of
adamc@898 1215 L.DontInfer => unravelKind (t, e)
adamc@704 1216 | _ => unravel (t, e)
adamc@704 1217 end
adamc@15 1218
adamc@628 1219 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1220 let
adamc@171 1221 val perror = (L'.PWild, loc)
adamc@171 1222 val terror = (L'.CError, loc)
adamc@171 1223 val pterror = (perror, terror)
adamc@171 1224 val rerror = (pterror, (env, bound))
adamc@171 1225
adamc@191 1226 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1227 case (po, to) of
adamc@188 1228 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1229 rerror)
adamc@188 1230 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1231 rerror)
adamc@191 1232 | (NONE, NONE) =>
adamc@191 1233 let
adamc@191 1234 val k = (L'.KType, loc)
adamc@191 1235 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1236 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1237 in
adamc@191 1238 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1239 (env, bound))
adamc@191 1240 end
adamc@188 1241 | (SOME p, SOME t) =>
adamc@188 1242 let
adamc@628 1243 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1244
adamc@191 1245 val k = (L'.KType, loc)
adamc@191 1246 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1247 val nxs = length unifs - 1
adamc@194 1248 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1249 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1250 in
adamc@628 1251 ignore (checkPatCon env p' pt t);
adamc@191 1252 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1253 (env, bound))
adamc@188 1254 end
adamc@171 1255 in
adamc@171 1256 case p of
adamc@171 1257 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1258 (env, bound))
adamc@171 1259 | L.PVar x =>
adamc@171 1260 let
adamc@171 1261 val t = if SS.member (bound, x) then
adamc@171 1262 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1263 terror)
adamc@171 1264 else
adamc@171 1265 cunif (loc, (L'.KType, loc))
adamc@171 1266 in
adamc@182 1267 (((L'.PVar (x, t), loc), t),
adamc@171 1268 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1269 end
adamc@173 1270 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1271 (env, bound))
adamc@171 1272 | L.PCon ([], x, po) =>
adamc@171 1273 (case E.lookupConstructor env x of
adamc@174 1274 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1275 rerror)
adamc@191 1276 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1277 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1278 (case E.lookupStr env m1 of
adamc@174 1279 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1280 rerror)
adamc@174 1281 | SOME (n, sgn) =>
adamc@174 1282 let
adamc@174 1283 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1284 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1285 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1286 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1287 ((L'.StrVar n, loc), sgn) ms
adamc@174 1288 in
adamc@174 1289 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1290 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1291 rerror)
adamc@191 1292 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1293 end)
adamc@174 1294
adamc@175 1295 | L.PRecord (xps, flex) =>
adamc@175 1296 let
adamc@175 1297 val (xpts, (env, bound, _)) =
adamc@175 1298 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1299 let
adamc@628 1300 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1301 in
adamc@175 1302 if SS.member (fbound, x) then
adamc@175 1303 expError env (DuplicatePatField (loc, x))
adamc@175 1304 else
adamc@175 1305 ();
adamc@175 1306 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1307 end)
adamc@175 1308 (env, bound, SS.empty) xps
adamc@175 1309
adamc@175 1310 val k = (L'.KType, loc)
adamc@175 1311 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1312 val c =
adamc@175 1313 if flex then
adamc@176 1314 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1315 else
adamc@176 1316 c
adamc@175 1317 in
adamc@182 1318 (((L'.PRecord xpts, loc),
adamc@175 1319 (L'.TRecord c, loc)),
adamc@175 1320 (env, bound))
adamc@175 1321 end
adamc@822 1322
adamc@822 1323 | L.PAnnot (p, t) =>
adamc@822 1324 let
adamc@822 1325 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822 1326 val (t', k, _) = elabCon (env, D.empty) t
adamc@822 1327 in
adamc@822 1328 checkPatCon env p' pt t';
adamc@822 1329 ((p', t'), (env, bound))
adamc@822 1330 end
adamc@171 1331 end
adamc@171 1332
adamc@819 1333 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819 1334 fun exhaustive (env, t, ps, loc) =
adamc@819 1335 let
adamc@819 1336 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819 1337
adamc@819 1338 fun patConNum pc =
adamc@819 1339 case pc of
adamc@819 1340 L'.PConVar n => n
adamc@819 1341 | L'.PConProj (m1, ms, x) =>
adamc@819 1342 let
adamc@819 1343 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1344 in
adamc@819 1345 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819 1346 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1347 | SOME (_, n, _, _, _) => n
adamc@819 1348 end
adamc@819 1349
adamc@819 1350 fun nameOfNum (t, n) =
adamc@819 1351 case t of
adamc@819 1352 L'.CModProj (m1, ms, x) =>
adamc@819 1353 let
adamc@819 1354 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1355 in
adamc@819 1356 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1357 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1358 | SOME (_, cons) =>
adamc@819 1359 case ListUtil.search (fn (name, n', _) =>
adamc@819 1360 if n' = n then
adamc@819 1361 SOME name
adamc@819 1362 else
adamc@819 1363 NONE) cons of
adamc@819 1364 NONE => fail 9
adamc@819 1365 | SOME name => L'.PConProj (m1, ms, name)
adamc@819 1366 end
adamc@819 1367 | _ => L'.PConVar n
adamc@819 1368
adamc@819 1369 fun S (args, c, P) =
adamc@819 1370 List.mapPartial
adamc@819 1371 (fn [] => fail 1
adamc@819 1372 | p1 :: ps =>
adamc@819 1373 let
adamc@819 1374 val loc = #2 p1
adamc@819 1375
adamc@819 1376 fun wild () =
adamc@819 1377 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819 1378 in
adamc@819 1379 case #1 p1 of
adamc@819 1380 L'.PPrim _ => NONE
adamc@819 1381 | L'.PCon (_, c', _, NONE) =>
adamc@819 1382 if patConNum c' = c then
adamc@819 1383 SOME ps
adamc@819 1384 else
adamc@819 1385 NONE
adamc@819 1386 | L'.PCon (_, c', _, SOME p) =>
adamc@819 1387 if patConNum c' = c then
adamc@819 1388 SOME (p :: ps)
adamc@819 1389 else
adamc@819 1390 NONE
adamc@819 1391 | L'.PRecord xpts =>
adamc@819 1392 SOME (map (fn x =>
adamc@819 1393 case ListUtil.search (fn (x', p, _) =>
adamc@819 1394 if x = x' then
adamc@819 1395 SOME p
adamc@819 1396 else
adamc@819 1397 NONE) xpts of
adamc@819 1398 NONE => (L'.PWild, loc)
adamc@819 1399 | SOME p => p) args @ ps)
adamc@819 1400 | L'.PWild => wild ()
adamc@819 1401 | L'.PVar _ => wild ()
adamc@819 1402 end)
adamc@819 1403 P
adamc@819 1404
adamc@819 1405 fun D P =
adamc@819 1406 List.mapPartial
adamc@819 1407 (fn [] => fail 2
adamc@819 1408 | (p1, _) :: ps =>
adamc@819 1409 case p1 of
adamc@819 1410 L'.PWild => SOME ps
adamc@819 1411 | L'.PVar _ => SOME ps
adamc@819 1412 | L'.PPrim _ => NONE
adamc@819 1413 | L'.PCon _ => NONE
adamc@819 1414 | L'.PRecord _ => NONE)
adamc@819 1415 P
adamc@819 1416
adamc@819 1417 fun I (P, q) =
adamc@819 1418 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819 1419 ("q", p_list (p_con env) q)];*)
adamc@819 1420 case q of
adamc@819 1421 [] => (case P of
adamc@819 1422 [] => SOME []
adamc@819 1423 | _ => NONE)
adamc@819 1424 | q1 :: qs =>
adamc@819 1425 let
adamc@819 1426 val loc = #2 q1
adamc@819 1427
adamc@819 1428 fun unapp (t, acc) =
adamc@830 1429 case #1 t of
adamc@830 1430 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819 1431 | _ => (t, rev acc)
adamc@819 1432
adamc@830 1433 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830 1434 val t1 = hnormCon env t1
adamc@819 1435 fun doSub t = foldl (fn (arg, t) => subConInCon (0, arg) t) t args
adamc@819 1436
adamc@819 1437 fun dtype (dtO, names) =
adamc@819 1438 let
adamc@819 1439 val nameSet = IS.addList (IS.empty, names)
adamc@819 1440 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819 1441 case ps of
adamc@819 1442 [] => fail 4
adamc@819 1443 | (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819 1444 (IS.delete (nameSet, patConNum pc)
adamc@819 1445 handle NotFound => nameSet)
adamc@819 1446 | _ => nameSet)
adamc@819 1447 nameSet P
adamc@819 1448 in
adamc@819 1449 nameSet
adamc@819 1450 end
adamc@819 1451
adamc@819 1452 fun default () = (NONE, IS.singleton 0, [])
adamc@819 1453
adamc@819 1454 val (dtO, unused, cons) =
adamc@830 1455 case #1 t1 of
adamc@819 1456 L'.CNamed n =>
adamc@819 1457 let
adamc@819 1458 val dt = E.lookupDatatype env n
adamc@819 1459 val cons = E.constructors dt
adamc@819 1460 in
adamc@819 1461 (SOME dt,
adamc@819 1462 dtype (SOME dt, map #2 cons),
adamc@819 1463 map (fn (_, n, co) =>
adamc@819 1464 (n,
adamc@819 1465 case co of
adamc@819 1466 NONE => []
adamc@819 1467 | SOME t => [("", doSub t)])) cons)
adamc@819 1468 end
adamc@819 1469 | L'.CModProj (m1, ms, x) =>
adamc@819 1470 let
adamc@819 1471 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1472 in
adamc@819 1473 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1474 NONE => default ()
adamc@819 1475 | SOME (_, cons) =>
adamc@819 1476 (NONE,
adamc@819 1477 dtype (NONE, map #2 cons),
adamc@819 1478 map (fn (s, _, co) =>
adamc@819 1479 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819 1480 case co of
adamc@819 1481 NONE => []
adamc@819 1482 | SOME t => [("", doSub t)])) cons)
adamc@819 1483 end
adamc@830 1484 | L'.TRecord t =>
adamc@830 1485 (case #1 (hnormCon env t) of
adamc@830 1486 L'.CRecord (_, xts) =>
adamc@830 1487 let
adamc@830 1488 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830 1489 | _ => NONE) xts
adamc@830 1490 in
adamc@830 1491 if List.all Option.isSome xts then
adamc@830 1492 let
adamc@830 1493 val xts = List.mapPartial (fn x => x) xts
adamc@830 1494 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830 1495 String.compare (x1, x2) = GREATER) xts
adamc@830 1496 in
adamc@830 1497 (NONE, IS.empty, [(0, xts)])
adamc@830 1498 end
adamc@830 1499 else
adamc@830 1500 default ()
adamc@830 1501 end
adamc@830 1502 | _ => default ())
adamc@819 1503 | _ => default ()
adamc@819 1504 in
adamc@819 1505 if IS.isEmpty unused then
adamc@819 1506 let
adamc@819 1507 fun recurse cons =
adamc@819 1508 case cons of
adamc@819 1509 [] => NONE
adamc@819 1510 | (name, args) :: cons =>
adamc@819 1511 case I (S (map #1 args, name, P),
adamc@819 1512 map #2 args @ qs) of
adamc@819 1513 NONE => recurse cons
adamc@819 1514 | SOME ps =>
adamc@819 1515 let
adamc@819 1516 val nargs = length args
adamc@819 1517 val argPs = List.take (ps, nargs)
adamc@819 1518 val restPs = List.drop (ps, nargs)
adamc@819 1519
adamc@819 1520 val p = case name of
adamc@819 1521 0 => L'.PRecord (ListPair.map
adamc@819 1522 (fn ((name, t), p) => (name, p, t))
adamc@819 1523 (args, argPs))
adamc@830 1524 | _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819 1525 case argPs of
adamc@819 1526 [] => NONE
adamc@819 1527 | [p] => SOME p
adamc@819 1528 | _ => fail 3)
adamc@819 1529 in
adamc@819 1530 SOME ((p, loc) :: restPs)
adamc@819 1531 end
adamc@819 1532 in
adamc@819 1533 recurse cons
adamc@819 1534 end
adamc@819 1535 else
adamc@819 1536 case I (D P, qs) of
adamc@819 1537 NONE => NONE
adamc@819 1538 | SOME ps =>
adamc@819 1539 let
adamc@819 1540 val p = case cons of
adamc@819 1541 [] => L'.PWild
adamc@819 1542 | (0, _) :: _ => L'.PWild
adamc@819 1543 | _ =>
adamc@819 1544 case IS.find (fn _ => true) unused of
adamc@819 1545 NONE => fail 6
adamc@819 1546 | SOME name =>
adamc@819 1547 case ListUtil.search (fn (name', args) =>
adamc@819 1548 if name = name' then
adamc@819 1549 SOME (name', args)
adamc@819 1550 else
adamc@819 1551 NONE) cons of
adamc@819 1552 SOME (n, []) =>
adamc@830 1553 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819 1554 | SOME (n, [_]) =>
adamc@830 1555 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819 1556 | _ => fail 7
adamc@819 1557 in
adamc@819 1558 SOME ((p, loc) :: ps)
adamc@819 1559 end
adamc@819 1560 end
adamc@819 1561 in
adamc@819 1562 case I (map (fn x => [x]) ps, [t]) of
adamc@819 1563 NONE => NONE
adamc@819 1564 | SOME [p] => SOME p
adamc@819 1565 | _ => fail 7
adamc@819 1566 end
adamc@819 1567
adamc@217 1568 fun unmodCon env (c, loc) =
adamc@217 1569 case c of
adamc@217 1570 L'.CNamed n =>
adamc@217 1571 (case E.lookupCNamed env n of
adamc@217 1572 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1573 | _ => (c, loc))
adamc@217 1574 | L'.CModProj (m1, ms, x) =>
adamc@217 1575 let
adamc@217 1576 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1577 in
adamc@217 1578 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1579 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1580 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1581 | _ => (c, loc)
adamc@217 1582 end
adamc@217 1583 | _ => (c, loc)
adamc@217 1584
adamc@721 1585 fun normClassKey env c =
adamc@467 1586 let
adamc@721 1587 val c = hnormCon env c
adamc@467 1588 in
adamc@467 1589 case #1 c of
adamc@467 1590 L'.CApp (c1, c2) =>
adamc@467 1591 let
adamc@721 1592 val c1 = normClassKey env c1
adamc@721 1593 val c2 = normClassKey env c2
adamc@467 1594 in
adamc@467 1595 (L'.CApp (c1, c2), #2 c)
adamc@467 1596 end
adamc@721 1597 | L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721 1598 normClassKey env c)) xcs), #2 c)
adamc@721 1599 | _ => unmodCon env c
adamc@467 1600 end
adamc@467 1601
adamc@467 1602 fun normClassConstraint env (c, loc) =
adamc@217 1603 case c of
adamc@217 1604 L'.CApp (f, x) =>
adamc@217 1605 let
adamc@721 1606 val f = normClassKey env f
adamc@467 1607 val x = normClassKey env x
adamc@217 1608 in
adamc@467 1609 (L'.CApp (f, x), loc)
adamc@217 1610 end
adamc@674 1611 | L'.TFun (c1, c2) =>
adamc@674 1612 let
adamc@674 1613 val c1 = normClassConstraint env c1
adamc@674 1614 val c2 = normClassConstraint env c2
adamc@674 1615 in
adamc@674 1616 (L'.TFun (c1, c2), loc)
adamc@674 1617 end
adamc@674 1618 | L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adamc@467 1619 | L'.CUnif (_, _, _, ref (SOME c)) => normClassConstraint env c
adamc@721 1620 | _ => unmodCon env (c, loc)
adamc@216 1621
adamc@92 1622 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1623 let
adamc@848 1624 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 1625 (*val befor = Time.now ()*)
adamc@280 1626
adamc@280 1627 val r = case e of
adamc@91 1628 L.EAnnot (e, t) =>
adamc@91 1629 let
adamc@91 1630 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1631 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1632 in
adamc@628 1633 checkCon env e' et t';
adamc@628 1634 (e', t', gs1 @ enD gs2)
adamc@91 1635 end
adamc@34 1636
adamc@91 1637 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1638 | L.EVar ([], s, infer) =>
adamc@91 1639 (case E.lookupE env s of
adamc@91 1640 E.NotBound =>
adamc@91 1641 (expError env (UnboundExp (loc, s));
adamc@91 1642 (eerror, cerror, []))
adamc@629 1643 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 1644 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1645 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1646 (case E.lookupStr env m1 of
adamc@91 1647 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1648 (eerror, cerror, []))
adamc@91 1649 | SOME (n, sgn) =>
adamc@91 1650 let
adamc@91 1651 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1652 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1653 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1654 (strerror, sgnerror))
adamc@91 1655 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1656 ((L'.StrVar n, loc), sgn) ms
adamc@10 1657
adamc@91 1658 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1659 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1660 cerror)
adamc@91 1661 | SOME t => t
adamc@91 1662 in
adamc@629 1663 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1664 end)
adamc@86 1665
adamc@349 1666 | L.EWild =>
adamc@210 1667 let
adamc@349 1668 val r = ref NONE
adamc@349 1669 val c = cunif (loc, (L'.KType, loc))
adamc@210 1670 in
adamc@349 1671 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1672 end
adamc@210 1673
adamc@91 1674 | L.EApp (e1, e2) =>
adamc@91 1675 let
adamc@91 1676 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@403 1677 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1678
adamc@91 1679 val dom = cunif (loc, ktype)
adamc@91 1680 val ran = cunif (loc, ktype)
adamc@838 1681 val t = (L'.TFun (dom, ran), loc)
adamc@91 1682 in
adamc@628 1683 checkCon env e1' t1 t;
adamc@628 1684 checkCon env e2' t2 dom;
adamc@628 1685 ((L'.EApp (e1', e2'), loc), ran, gs1 @ gs2)
adamc@91 1686 end
adamc@91 1687 | L.EAbs (x, to, e) =>
adamc@91 1688 let
adamc@91 1689 val (t', gs1) = case to of
adamc@91 1690 NONE => (cunif (loc, ktype), [])
adamc@91 1691 | SOME t =>
adamc@91 1692 let
adamc@91 1693 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1694 in
adamc@91 1695 checkKind env t' tk ktype;
adamc@91 1696 (t', gs)
adamc@91 1697 end
adamc@467 1698 val dom = normClassConstraint env t'
adamc@467 1699 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1700 in
adamc@91 1701 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1702 (L'.TFun (t', et), loc),
adamc@467 1703 enD gs1 @ gs2)
adamc@91 1704 end
adamc@91 1705 | L.ECApp (e, c) =>
adamc@91 1706 let
adamc@91 1707 val (e', et, gs1) = elabExp (env, denv) e
adamc@328 1708 val oldEt = et
adamc@403 1709 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 1710 val (et', _) = hnormCon env et
adamc@91 1711 in
adamc@91 1712 case et' of
adamc@91 1713 L'.CError => (eerror, cerror, [])
adamc@328 1714 | L'.TCFun (_, x, k, eb) =>
adamc@91 1715 let
adamc@91 1716 val () = checkKind env c' ck k
adamc@91 1717 val eb' = subConInCon (0, c') eb
adamc@339 1718 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1719 cerror)
adamc@91 1720 in
adamc@328 1721 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1722 ("et", p_con env oldEt),
adamc@328 1723 ("x", PD.string x),
adamc@328 1724 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1725 ("c", p_con env c'),
adamc@328 1726 ("eb'", p_con env eb')];*)
adamc@628 1727 ((L'.ECApp (e', c'), loc), eb', gs1 @ enD gs2)
adamc@91 1728 end
adamc@91 1729
adamc@91 1730 | _ =>
adamc@91 1731 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1732 (eerror, cerror, []))
adamc@91 1733 end
adamc@91 1734 | L.ECAbs (expl, x, k, e) =>
adamc@91 1735 let
adamc@91 1736 val expl' = elabExplicitness expl
adamc@623 1737 val k' = elabKind env k
adamc@328 1738
adamc@328 1739 val env' = E.pushCRel env x k'
adamc@328 1740 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1741 in
adamc@91 1742 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1743 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1744 gs)
adamc@91 1745 end
adamc@623 1746 | L.EKAbs (x, e) =>
adamc@623 1747 let
adamc@623 1748 val env' = E.pushKRel env x
adamc@623 1749 val (e', et, gs) = elabExp (env', denv) e
adamc@623 1750 in
adamc@623 1751 ((L'.EKAbs (x, e'), loc),
adamc@623 1752 (L'.TKFun (x, et), loc),
adamc@623 1753 gs)
adamc@623 1754 end
adamc@91 1755
adamc@91 1756 | L.EDisjoint (c1, c2, e) =>
adamc@91 1757 let
adamc@91 1758 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1759 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1760
adamc@91 1761 val ku1 = kunif loc
adamc@91 1762 val ku2 = kunif loc
adamc@91 1763
adamc@628 1764 val denv' = D.assert env denv (c1', c2')
adamc@628 1765 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 1766 in
adamc@91 1767 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1768 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1769
adamc@628 1770 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 1771 end
adamc@629 1772 | L.EDisjointApp e =>
adamc@629 1773 let
adamc@629 1774 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 1775
adamc@629 1776 val k1 = kunif loc
adamc@629 1777 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629 1778 val k2 = kunif loc
adamc@629 1779 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629 1780 val t' = cunif (loc, ktype)
adamc@629 1781 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 1782 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 1783 in
adamc@629 1784 (e', t', enD gs2 @ gs1)
adamc@629 1785 end
adamc@91 1786
adamc@91 1787 | L.ERecord xes =>
adamc@91 1788 let
adamc@91 1789 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1790 let
adamc@91 1791 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1792 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1793 in
adamc@91 1794 checkKind env x' xk kname;
adamc@228 1795 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1796 end)
adamc@91 1797 [] xes
adamc@91 1798
adamc@91 1799 val k = (L'.KType, loc)
adamc@91 1800
adamc@91 1801 fun prove (xets, gs) =
adamc@91 1802 case xets of
adamc@91 1803 [] => gs
adamc@91 1804 | (x, _, t) :: rest =>
adamc@91 1805 let
adamc@91 1806 val xc = (x, t)
adamc@91 1807 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1808 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1809 let
adamc@91 1810 val xc' = (x', t')
adamc@91 1811 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1812 in
adamc@91 1813 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1814 end)
adamc@91 1815 gs rest
adamc@91 1816 in
adamc@91 1817 prove (rest, gs)
adamc@91 1818 end
adamc@228 1819
adamc@228 1820 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1821 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1822 in
adamc@255 1823 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1824 ((L'.ERecord xes', loc),
adamc@91 1825 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1826 enD (prove (xes', gsD)) @ gsO)
adamc@91 1827 end
adamc@91 1828
adamc@91 1829 | L.EField (e, c) =>
adamc@91 1830 let
adamc@91 1831 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1832 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1833
adamc@91 1834 val ft = cunif (loc, ktype)
adamc@91 1835 val rest = cunif (loc, ktype_record)
adamc@91 1836 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1837 val () = checkCon env e' et
adamc@629 1838 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 1839 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 1840 in
adamc@628 1841 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 1842 end
adamc@91 1843
adamc@445 1844 | L.EConcat (e1, e2) =>
adamc@339 1845 let
adamc@339 1846 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 1847 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 1848
adamc@445 1849 val r1 = cunif (loc, ktype_record)
adamc@445 1850 val r2 = cunif (loc, ktype_record)
adamc@445 1851
adamc@629 1852 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 1853 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 1854
adamc@628 1855 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 1856 in
adamc@445 1857 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 1858 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 1859 gs1 @ gs2 @ enD gs3)
adamc@339 1860 end
adamc@149 1861 | L.ECut (e, c) =>
adamc@149 1862 let
adamc@149 1863 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1864 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1865
adamc@149 1866 val ft = cunif (loc, ktype)
adamc@149 1867 val rest = cunif (loc, ktype_record)
adamc@149 1868 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1869
adamc@629 1870 val () = checkCon env e' et
adamc@629 1871 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1872
adamc@628 1873 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 1874 in
adamc@228 1875 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1876 gs1 @ enD gs2 @ enD gs3)
adamc@149 1877 end
adamc@493 1878 | L.ECutMulti (e, c) =>
adamc@493 1879 let
adamc@493 1880 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 1881 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 1882
adamc@493 1883 val rest = cunif (loc, ktype_record)
adamc@629 1884
adamc@629 1885 val () = checkCon env e' et
adamc@629 1886 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 1887
adamc@628 1888 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 1889 in
adamc@493 1890 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1891 gs1 @ enD gs2 @ enD gs3)
adamc@493 1892 end
adamc@149 1893
adamc@171 1894 | L.ECase (e, pes) =>
adamc@171 1895 let
adamc@171 1896 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1897 val result = cunif (loc, (L'.KType, loc))
adamc@171 1898 val (pes', gs) = ListUtil.foldlMap
adamc@171 1899 (fn ((p, e), gs) =>
adamc@171 1900 let
adamc@628 1901 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 1902
adamc@629 1903 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 1904 in
adamc@628 1905 checkPatCon env p' pt et;
adamc@629 1906 checkCon env e' et' result;
adamc@628 1907 ((p', e'), gs1 @ gs)
adamc@171 1908 end)
adamc@171 1909 gs1 pes
adamc@171 1910 in
adamc@819 1911 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 1912 NONE => ()
adamc@830 1913 | SOME p => if !mayDelay then
adamc@830 1914 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 1915 else
adamc@830 1916 expError env (Inexhaustive (loc, p));
adamc@172 1917
adamc@628 1918 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 1919 end
adamc@447 1920
adamc@447 1921 | L.ELet (eds, e) =>
adamc@447 1922 let
adamc@447 1923 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 1924 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 1925 in
adamc@825 1926 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 1927 end
adamc@280 1928 in
adamc@819 1929 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 1930 r
adamc@91 1931 end
adamc@31 1932
adamc@628 1933 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 1934 let
adamc@447 1935 val r =
adamc@447 1936 case d of
adamc@825 1937 L.EDVal (p, e) =>
adamc@447 1938 let
adamc@825 1939 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 1940 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 1941
adamc@825 1942 val () = checkCon env e' et pt
adamc@825 1943
adamc@825 1944 val pt = normClassConstraint env pt
adamc@447 1945 in
adamc@830 1946 case exhaustive (env, et, [p'], loc) of
adamc@830 1947 NONE => ()
adamc@830 1948 | SOME p => if !mayDelay then
adamc@830 1949 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 1950 else
adamc@830 1951 expError env (Inexhaustive (loc, p));
adamc@830 1952
adamc@825 1953 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 1954 end
adamc@447 1955 | L.EDValRec vis =>
adamc@447 1956 let
adamc@447 1957 fun allowable (e, _) =
adamc@447 1958 case e of
adamc@447 1959 L.EAbs _ => true
adamc@447 1960 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 1961 | L.EKAbs (_, e) => allowable e
adamc@447 1962 | L.EDisjoint (_, _, e) => allowable e
adamc@447 1963 | _ => false
adamc@447 1964
adamc@447 1965 val (vis, gs) = ListUtil.foldlMap
adamc@447 1966 (fn ((x, co, e), gs) =>
adamc@447 1967 let
adamc@447 1968 val (c', _, gs1) = case co of
adamc@447 1969 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 1970 | SOME c => elabCon (env, denv) c
adamc@447 1971 in
adamc@447 1972 ((x, c', e), enD gs1 @ gs)
adamc@447 1973 end) gs vis
adamc@447 1974
adamc@447 1975 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 1976
adamc@447 1977 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 1978 let
adamc@447 1979 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 1980 in
adamc@628 1981 checkCon env e' et c';
adamc@447 1982 if allowable e then
adamc@447 1983 ()
adamc@447 1984 else
adamc@447 1985 expError env (IllegalRec (x, e'));
adamc@628 1986 ((x, c', e'), gs1 @ gs)
adamc@447 1987 end) gs vis
adamc@447 1988 in
adamc@447 1989 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 1990 end
adamc@447 1991 in
adamc@447 1992 r
adamc@447 1993 end
adamc@447 1994
adamc@42 1995 val hnormSgn = E.hnormSgn
adamc@31 1996
adamc@210 1997 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 1998 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 1999 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2000 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2001 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2002 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2003
adamc@469 2004 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2005 case E.lookupStr env str of
adamc@469 2006 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2007 denv)
adamc@469 2008 | SOME (n, sgn) =>
adamc@469 2009 let
adamc@469 2010 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2011 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2012 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2013 (strerror, sgnerror))
adamc@469 2014 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2015 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2016
adamc@1030 2017 fun collect first (st, sgn) =
adamc@1030 2018 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1030 2019 NONE => (if first then
adamc@1030 2020 strError env (UnboundStr (loc, str))
adamc@1030 2021 else
adamc@1030 2022 ();
adamc@1030 2023 [])
adamc@1030 2024 | SOME cs =>
adamc@1030 2025 case #1 (hnormSgn env sgn) of
adamc@1030 2026 L'.SgnConst sgis =>
adamc@1030 2027 foldl (fn (sgi, cs) =>
adamc@1030 2028 case #1 sgi of
adamc@1030 2029 L'.SgiStr (x, _, _) =>
adamc@1030 2030 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2031 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2032 | SOME sgn' =>
adamc@1030 2033 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2034 cs))
adamc@1030 2035 | _ => cs) cs sgis
adamc@1030 2036 | _ => cs
adamc@469 2037 in
adamc@1030 2038 foldl (fn ((c1, c2), denv) =>
adamc@1030 2039 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2040 end
adamc@469 2041
adamc@88 2042 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 2043 case sgi of
adamc@76 2044 L.SgiConAbs (x, k) =>
adamc@76 2045 let
adamc@623 2046 val k' = elabKind env k
adamc@31 2047
adamc@76 2048 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 2049 in
adamc@88 2050 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 2051 end
adamc@31 2052
adamc@76 2053 | L.SgiCon (x, ko, c) =>
adamc@76 2054 let
adamc@76 2055 val k' = case ko of
adamc@76 2056 NONE => kunif loc
adamc@623 2057 | SOME k => elabKind env k
adamc@31 2058
adamc@83 2059 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 2060 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 2061 in
adamc@76 2062 checkKind env c' ck k';
adamc@31 2063
adamc@88 2064 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 2065 end
adamc@31 2066
adamc@805 2067 | L.SgiDatatype dts =>
adamc@157 2068 let
adamc@157 2069 val k = (L'.KType, loc)
adamc@805 2070
adamc@805 2071 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@805 2072 let
adamc@805 2073 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2074 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 2075 in
adamc@805 2076 ((x, n, xs, xcs), env)
adamc@805 2077 end)
adamc@805 2078 env dts
adamc@805 2079
adamc@805 2080 val (dts, env) = ListUtil.foldlMap
adamc@805 2081 (fn ((x, n, xs, xcs), env) =>
adamc@805 2082 let
adamc@805 2083 val t = (L'.CNamed n, loc)
adamc@805 2084 val nxs = length xs - 1
adamc@805 2085 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@805 2086 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 2087
adamc@805 2088 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 2089 (E.pushCRel env' x k,
adamc@805 2090 D.enter denv')) (env, denv) xs
adamc@805 2091
adamc@805 2092 val (xcs, (used, env, gs)) =
adamc@805 2093 ListUtil.foldlMap
adamc@805 2094 (fn ((x, to), (used, env, gs)) =>
adamc@805 2095 let
adamc@805 2096 val (to, t, gs') = case to of
adamc@805 2097 NONE => (NONE, t, gs)
adamc@805 2098 | SOME t' =>
adamc@805 2099 let
adamc@805 2100 val (t', tk, gs') =
adamc@805 2101 elabCon (env', denv') t'
adamc@805 2102 in
adamc@805 2103 checkKind env' t' tk k;
adamc@805 2104 (SOME t',
adamc@805 2105 (L'.TFun (t', t), loc),
adamc@805 2106 gs' @ gs)
adamc@805 2107 end
adamc@805 2108 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@805 2109 t xs
adamc@805 2110
adamc@805 2111 val (env, n') = E.pushENamed env x t
adamc@805 2112 in
adamc@805 2113 if SS.member (used, x) then
adamc@805 2114 strError env (DuplicateConstructor (x, loc))
adamc@805 2115 else
adamc@805 2116 ();
adamc@805 2117 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 2118 end)
adamc@805 2119 (SS.empty, env, []) xcs
adamc@805 2120 in
adamc@805 2121 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@805 2122 end)
adamc@805 2123 env dts
adamc@157 2124 in
adamc@805 2125 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@157 2126 end
adamc@156 2127
adamc@158 2128 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 2129
adamc@158 2130 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 2131 (case E.lookupStr env m1 of
adamc@158 2132 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 2133 ([], (env, denv, gs)))
adamc@158 2134 | SOME (n, sgn) =>
adamc@158 2135 let
adamc@158 2136 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 2137 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 2138 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 2139 (strerror, sgnerror))
adamc@158 2140 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 2141 ((L'.StrVar n, loc), sgn) ms
adamc@158 2142 in
adamc@628 2143 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 2144 (L'.CModProj (n, ms, s), _) =>
adamc@161 2145 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 2146 NONE => (conError env (UnboundDatatype (loc, s));
adamc@628 2147 ([], (env, denv, [])))
adamc@191 2148 | SOME (xs, xncs) =>
adamc@161 2149 let
adamc@161 2150 val k = (L'.KType, loc)
adamc@191 2151 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2152
adamc@161 2153 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 2154 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 2155 val env = E.pushDatatype env n' xs xncs
adamc@158 2156
adamc@161 2157 val t = (L'.CNamed n', loc)
adamc@161 2158 val env = foldl (fn ((x, n, to), env) =>
adamc@161 2159 let
adamc@161 2160 val t = case to of
adamc@161 2161 NONE => t
adamc@161 2162 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 2163
adamc@191 2164 val t = foldr (fn (x, t) =>
adamc@191 2165 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 2166 t xs
adamc@161 2167 in
adamc@161 2168 E.pushENamedAs env x n t
adamc@161 2169 end) env xncs
adamc@161 2170 in
adamc@628 2171 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@161 2172 end)
adamc@161 2173 | _ => (strError env (NotDatatype loc);
adamc@161 2174 ([], (env, denv, [])))
adamc@158 2175 end)
adamc@156 2176
adamc@76 2177 | L.SgiVal (x, c) =>
adamc@76 2178 let
adamc@83 2179 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 2180
adamc@721 2181 val old = c'
adamc@711 2182 val c' = normClassConstraint env c'
adamc@76 2183 val (env', n) = E.pushENamed env x c'
adamc@76 2184 in
adamc@623 2185 (unifyKinds env ck ktype
adamc@706 2186 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@31 2187
adamc@467 2188 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 2189 end
adamc@31 2190
adamc@707 2191 | L.SgiTable (x, c, pe, ce) =>
adamc@706 2192 let
adamc@706 2193 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@706 2194 val x' = x ^ "_hidden_constraints"
adamc@706 2195 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@706 2196 val hidden = (L'.CNamed hidden_n, loc)
adamc@706 2197
adamc@706 2198 val (c', ck, gs') = elabCon (env, denv) c
adamc@707 2199 val pkey = cunif (loc, cstK)
adamc@706 2200 val visible = cunif (loc, cstK)
adamc@706 2201 val uniques = (L'.CConcat (visible, hidden), loc)
adamc@706 2202
adamc@706 2203 val ct = tableOf ()
adamc@706 2204 val ct = (L'.CApp (ct, c'), loc)
adamc@707 2205 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@707 2206
adamc@707 2207 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@707 2208 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2209 | _ => NONE) gs''
adamc@707 2210
adamc@707 2211 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 2212 val pst = (L'.CApp (pst, c'), loc)
adamc@707 2213 val pst = (L'.CApp (pst, pkey), loc)
adamc@706 2214
adamc@706 2215 val (env', n) = E.pushENamed env' x ct
adamc@706 2216
adamc@707 2217 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@707 2218 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2219 | _ => NONE) gs'''
adamc@706 2220
adamc@706 2221 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@706 2222 val cst = (L'.CApp (cst, c'), loc)
adamc@706 2223 val cst = (L'.CApp (cst, visible), loc)
adamc@706 2224 in
adamc@706 2225 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@707 2226 checkCon env' pe' pet pst;
adamc@707 2227 checkCon env' ce' cet cst;
adamc@706 2228
adamc@706 2229 ([(L'.SgiConAbs (x', hidden_n, cstK), loc),
adamc@707 2230 (L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@706 2231 end
adamc@706 2232
adamc@76 2233 | L.SgiStr (x, sgn) =>
adamc@76 2234 let
adamc@83 2235 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2236 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2237 in
adamc@88 2238 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2239 end
adamc@31 2240
adamc@76 2241 | L.SgiSgn (x, sgn) =>
adamc@76 2242 let
adamc@83 2243 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2244 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 2245 in
adamc@88 2246 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2247 end
adamc@31 2248
adamc@76 2249 | L.SgiInclude sgn =>
adamc@76 2250 let
adamc@83 2251 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2252 in
adamc@76 2253 case #1 (hnormSgn env sgn') of
adamc@76 2254 L'.SgnConst sgis =>
adamc@88 2255 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 2256 | _ => (sgnError env (NotIncludable sgn');
adamc@88 2257 ([], (env, denv, [])))
adamc@88 2258 end
adamc@88 2259
adamc@88 2260 | L.SgiConstraint (c1, c2) =>
adamc@88 2261 let
adamc@88 2262 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 2263 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 2264
adamc@628 2265 val denv = D.assert env denv (c1', c2')
adamc@88 2266 in
adamc@88 2267 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 2268 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 2269
adamc@628 2270 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@76 2271 end
adamc@31 2272
adamc@563 2273 | L.SgiClassAbs (x, k) =>
adamc@211 2274 let
adamc@623 2275 val k = elabKind env k
adamc@711 2276 val (env, n) = E.pushCNamed env x k NONE
adamc@211 2277 val env = E.pushClass env n
adamc@211 2278 in
adamc@563 2279 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@211 2280 end
adamc@211 2281
adamc@563 2282 | L.SgiClass (x, k, c) =>
adamc@211 2283 let
adamc@623 2284 val k = elabKind env k
adamc@211 2285 val (c', ck, gs) = elabCon (env, denv) c
adamc@711 2286 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 2287 val env = E.pushClass env n
adamc@211 2288 in
adamc@711 2289 checkKind env c' ck k;
adamc@563 2290 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@211 2291 end
adamc@211 2292
adamc@83 2293 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2294 case sgn of
adamc@31 2295 L.SgnConst sgis =>
adamc@31 2296 let
adamc@88 2297 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2298
adamc@62 2299 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2300 case sgi of
adamc@62 2301 L'.SgiConAbs (x, _, _) =>
adamc@62 2302 (if SS.member (cons, x) then
adamc@62 2303 sgnError env (DuplicateCon (loc, x))
adamc@62 2304 else
adamc@62 2305 ();
adamc@62 2306 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2307 | L'.SgiCon (x, _, _, _) =>
adamc@62 2308 (if SS.member (cons, x) then
adamc@62 2309 sgnError env (DuplicateCon (loc, x))
adamc@62 2310 else
adamc@62 2311 ();
adamc@62 2312 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2313 | L'.SgiDatatype dts =>
adamc@156 2314 let
adamc@805 2315 val (cons, vals) =
adamc@805 2316 let
adamc@805 2317 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2318 let
adamc@805 2319 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2320 (if SS.member (vals, x) then
adamc@805 2321 sgnError env (DuplicateVal (loc, x))
adamc@805 2322 else
adamc@805 2323 ();
adamc@805 2324 SS.add (vals, x)))
adamc@805 2325 vals xncs
adamc@805 2326 in
adamc@805 2327 if SS.member (cons, x) then
adamc@805 2328 sgnError env (DuplicateCon (loc, x))
adamc@805 2329 else
adamc@805 2330 ();
adamc@805 2331 (SS.add (cons, x), vals)
adamc@805 2332 end
adamc@805 2333 in
adamc@805 2334 foldl doOne (cons, vals) dts
adamc@805 2335 end
adamc@156 2336 in
adamc@805 2337 (cons, vals, sgns, strs)
adamc@156 2338 end
adamc@191 2339 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2340 (if SS.member (cons, x) then
adamc@156 2341 sgnError env (DuplicateCon (loc, x))
adamc@156 2342 else
adamc@156 2343 ();
adamc@156 2344 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2345 | L'.SgiVal (x, _, _) =>
adamc@62 2346 (if SS.member (vals, x) then
adamc@62 2347 sgnError env (DuplicateVal (loc, x))
adamc@62 2348 else
adamc@62 2349 ();
adamc@62 2350 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2351 | L'.SgiSgn (x, _, _) =>
adamc@62 2352 (if SS.member (sgns, x) then
adamc@62 2353 sgnError env (DuplicateSgn (loc, x))
adamc@62 2354 else
adamc@62 2355 ();
adamc@62 2356 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2357 | L'.SgiStr (x, _, _) =>
adamc@62 2358 (if SS.member (strs, x) then
adamc@62 2359 sgnError env (DuplicateStr (loc, x))
adamc@62 2360 else
adamc@62 2361 ();
adamc@88 2362 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2363 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2364 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2365 (if SS.member (cons, x) then
adamc@211 2366 sgnError env (DuplicateCon (loc, x))
adamc@211 2367 else
adamc@211 2368 ();
adamc@211 2369 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2370 | L'.SgiClass (x, _, _, _) =>
adamc@211 2371 (if SS.member (cons, x) then
adamc@211 2372 sgnError env (DuplicateCon (loc, x))
adamc@211 2373 else
adamc@211 2374 ();
adamc@460 2375 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2376 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2377 in
adamc@83 2378 ((L'.SgnConst sgis', loc), gs)
adamc@31 2379 end
adamc@31 2380 | L.SgnVar x =>
adamc@31 2381 (case E.lookupSgn env x of
adamc@31 2382 NONE =>
adamc@31 2383 (sgnError env (UnboundSgn (loc, x));
adamc@83 2384 ((L'.SgnError, loc), []))
adamc@83 2385 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2386 | L.SgnFun (m, dom, ran) =>
adamc@41 2387 let
adamc@83 2388 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2389 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2390 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2391 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2392 in
adamc@83 2393 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2394 end
adamc@42 2395 | L.SgnWhere (sgn, x, c) =>
adamc@42 2396 let
adamc@83 2397 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2398 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2399 in
adamc@42 2400 case #1 (hnormSgn env sgn') of
adamc@83 2401 L'.SgnError => (sgnerror, [])
adamc@42 2402 | L'.SgnConst sgis =>
adamc@75 2403 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2404 x' = x andalso
adamc@623 2405 (unifyKinds env k ck
adamc@75 2406 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2407 true)
adamc@42 2408 | _ => false) sgis then
adamc@83 2409 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2410 else
adamc@42 2411 (sgnError env (UnWhereable (sgn', x));
adamc@83 2412 (sgnerror, []))
adamc@42 2413 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2414 (sgnerror, []))
adamc@42 2415 end
adamc@59 2416 | L.SgnProj (m, ms, x) =>
adamc@59 2417 (case E.lookupStr env m of
adamc@59 2418 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2419 (sgnerror, []))
adamc@59 2420 | SOME (n, sgn) =>
adamc@59 2421 let
adamc@59 2422 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2423 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2424 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2425 (strerror, sgnerror))
adamc@59 2426 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2427 ((L'.StrVar n, loc), sgn) ms
adamc@59 2428 in
adamc@59 2429 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2430 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2431 (sgnerror, []))
adamc@83 2432 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2433 end)
adamc@59 2434
adamc@31 2435
adamc@706 2436 and selfify env {str, strs, sgn} =
adamc@66 2437 case #1 (hnormSgn env sgn) of
adamc@66 2438 L'.SgnError => sgn
adamc@66 2439 | L'.SgnVar _ => sgn
adamc@66 2440
adamc@66 2441 | L'.SgnConst sgis =>
adamc@805 2442 (L'.SgnConst (ListUtil.mapConcat (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@805 2443 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2444 | (L'.SgiDatatype dts, loc) =>
adamc@805 2445 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@563 2446 | (L'.SgiClassAbs (x, n, k), loc) =>
adamc@805 2447 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@66 2448 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@805 2449 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adamc@805 2450 | x => [x]) sgis), #2 sgn)
adamc@66 2451 | L'.SgnFun _ => sgn
adamc@66 2452 | L'.SgnWhere _ => sgn
adamc@66 2453 | L'.SgnProj (m, ms, x) =>
adamc@66 2454 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2455 (L'.StrVar m, #2 sgn) ms,
adamc@66 2456 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2457 field = x} of
adamc@66 2458 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2459 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2460
adamc@706 2461 and selfifyAt env {str, sgn} =
adamc@66 2462 let
adamc@66 2463 fun self (str, _) =
adamc@66 2464 case str of
adamc@66 2465 L'.StrVar x => SOME (x, [])
adamc@66 2466 | L'.StrProj (str, x) =>
adamc@66 2467 (case self str of
adamc@66 2468 NONE => NONE
adamc@66 2469 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2470 | _ => NONE
adamc@66 2471 in
adamc@66 2472 case self str of
adamc@66 2473 NONE => sgn
adamc@66 2474 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2475 end
adamc@66 2476
adamc@706 2477 and dopen env {str, strs, sgn} =
adamc@66 2478 let
adamc@66 2479 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2480 (L'.StrVar str, #2 sgn) strs
adamc@66 2481 in
adamc@66 2482 case #1 (hnormSgn env sgn) of
adamc@66 2483 L'.SgnConst sgis =>
adamc@805 2484 ListUtil.foldlMapConcat
adamc@805 2485 (fn ((sgi, loc), env') =>
adamc@805 2486 let
adamc@805 2487 val d =
adamc@805 2488 case sgi of
adamc@805 2489 L'.SgiConAbs (x, n, k) =>
adamc@805 2490 let
adamc@805 2491 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2492 in
adamc@805 2493 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2494 end
adamc@805 2495 | L'.SgiCon (x, n, k, c) =>
adamc@805 2496 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2497 | L'.SgiDatatype dts =>
adamc@805 2498 map (fn (x, n, xs, xncs) => (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@805 2499 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@805 2500 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adamc@805 2501 | L'.SgiVal (x, n, t) =>
adamc@805 2502 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adamc@805 2503 | L'.SgiStr (x, n, sgn) =>
adamc@805 2504 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adamc@805 2505 | L'.SgiSgn (x, n, sgn) =>
adamc@805 2506 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adamc@805 2507 | L'.SgiConstraint (c1, c2) =>
adamc@805 2508 [(L'.DConstraint (c1, c2), loc)]
adamc@805 2509 | L'.SgiClassAbs (x, n, k) =>
adamc@805 2510 let
adamc@805 2511 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2512 in
adamc@805 2513 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2514 end
adamc@805 2515 | L'.SgiClass (x, n, k, _) =>
adamc@805 2516 let
adamc@805 2517 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2518 in
adamc@805 2519 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2520 end
adamc@805 2521 in
adamc@805 2522 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 2523 end)
adamc@805 2524 env sgis
adamc@66 2525 | _ => (strError env (UnOpenable sgn);
adamc@628 2526 ([], env))
adamc@66 2527 end
adamc@66 2528
adamc@706 2529 and sgiOfDecl (d, loc) =
adamc@31 2530 case d of
adamc@123 2531 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2532 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2533 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2534 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2535 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2536 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2537 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2538 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2539 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2540 | L'.DExport _ => []
adamc@707 2541 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 2542 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 2543 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 2544 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 2545 | L'.DView (tn, x, n, _, c) =>
adamc@754 2546 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563 2547 | L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271 2548 | L'.DDatabase _ => []
adamc@460 2549 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 2550 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@88 2551
adamc@1000 2552 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 2553 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2554 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2555 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2556 (L'.SgnError, _) => ()
adamc@31 2557 | (_, L'.SgnError) => ()
adamc@31 2558
adamc@31 2559 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2560 let
adamc@362 2561 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2562 ("sgn2", p_sgn env sgn2),
adamc@362 2563 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2564 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2565
adamc@838 2566 fun cpart n = IM.find (!counterparts, n)
adamc@838 2567 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 2568
adamc@838 2569 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 2570 con = fn c =>
adamc@838 2571 case c of
adamc@838 2572 L'.CNamed n2 =>
adamc@838 2573 (case cpart n2 of
adamc@838 2574 NONE => c
adamc@838 2575 | SOME n1 => L'.CNamed n1)
adamc@838 2576 | _ => c}
adamc@838 2577
adamc@628 2578 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 2579 let
adamc@362 2580 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2581
adamc@805 2582 fun seek' f p =
adamc@31 2583 let
adamc@628 2584 fun seek env ls =
adamc@31 2585 case ls of
adamc@805 2586 [] => f env
adamc@31 2587 | h :: t =>
adamc@469 2588 case p (env, h) of
adamc@469 2589 NONE =>
adamc@469 2590 let
adamc@469 2591 val env = case #1 h of
adamc@469 2592 L'.SgiCon (x, n, k, c) =>
adamc@471 2593 if E.checkENamed env n then
adamc@471 2594 env
adamc@471 2595 else
adamc@471 2596 E.pushCNamedAs env x n k (SOME c)
adamc@469 2597 | L'.SgiConAbs (x, n, k) =>
adamc@471 2598 if E.checkENamed env n then
adamc@471 2599 env
adamc@471 2600 else
adamc@471 2601 E.pushCNamedAs env x n k NONE
adamc@469 2602 | _ => env
adamc@469 2603 in
adamc@628 2604 seek (E.sgiBinds env h) t
adamc@469 2605 end
adamc@88 2606 | SOME envs => envs
adamc@31 2607 in
adamc@628 2608 seek env sgis1
adamc@31 2609 end
adamc@805 2610
adamc@1000 2611 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 2612 env))
adamc@31 2613 in
adamc@31 2614 case sgi of
adamc@31 2615 L'.SgiConAbs (x, n2, k2) =>
adamc@469 2616 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31 2617 let
adamc@41 2618 fun found (x', n1, k1, co1) =
adamc@41 2619 if x = x' then
adamc@41 2620 let
adamc@623 2621 val () = unifyKinds env k1 k2
adamc@41 2622 handle KUnify (k1, k2, err) =>
adamc@1000 2623 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2624 sgi2All, k2, err))
adamc@41 2625 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2626 in
adamc@41 2627 SOME (if n1 = n2 then
adamc@41 2628 env
adamc@41 2629 else
adamc@838 2630 (cparts (n2, n1);
adamc@838 2631 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 2632 end
adamc@41 2633 else
adamc@41 2634 NONE
adamc@31 2635 in
adamc@31 2636 case sgi1 of
adamc@41 2637 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2638 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 2639 | L'.SgiDatatype dts =>
adamc@191 2640 let
adamc@191 2641 val k = (L'.KType, loc)
adamc@805 2642
adamc@805 2643 fun search dts =
adamc@805 2644 case dts of
adamc@805 2645 [] => NONE
adamc@805 2646 | (x', n1, xs, _) :: dts =>
adamc@805 2647 let
adamc@805 2648 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2649 in
adamc@805 2650 case found (x', n1, k', NONE) of
adamc@805 2651 NONE => search dts
adamc@805 2652 | x => x
adamc@805 2653 end
adamc@191 2654 in
adamc@805 2655 search dts
adamc@191 2656 end
adamc@191 2657 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2658 let
adamc@191 2659 val k = (L'.KType, loc)
adamc@191 2660 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2661 in
adamc@191 2662 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2663 end
adamc@711 2664 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 2665 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 2666 | _ => NONE
adamc@31 2667 end)
adamc@31 2668
adamc@31 2669 | L'.SgiCon (x, n2, k2, c2) =>
adamc@469 2670 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2671 let
adamc@211 2672 fun found (x', n1, k1, c1) =
adamc@211 2673 if x = x' then
adamc@211 2674 let
adamc@838 2675 val c2 = sub2 c2
adamc@838 2676
adamc@327 2677 fun good () =
adamc@327 2678 let
adamc@327 2679 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2680 val env = if n1 = n2 then
adamc@327 2681 env
adamc@327 2682 else
adamc@839 2683 (cparts (n2, n1);
adamc@839 2684 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 2685 in
adamc@628 2686 SOME env
adamc@327 2687 end
adamc@211 2688 in
adamc@987 2689 (unifyCons env loc c1 c2;
adamc@628 2690 good ())
adamc@211 2691 handle CUnify (c1, c2, err) =>
adamc@1000 2692 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 2693 sgi2All, c2, err));
adamc@211 2694 good ())
adamc@211 2695 end
adamc@211 2696 else
adamc@211 2697 NONE
adamc@211 2698 in
adamc@211 2699 case sgi1 of
adamc@211 2700 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 2701 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2702 | _ => NONE
adamc@211 2703 end)
adamc@31 2704
adamc@805 2705 | L'.SgiDatatype dts2 =>
adamc@805 2706 let
adamc@805 2707 fun found' (sgi1All, (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 2708 if x1 <> x2 then
adamc@805 2709 NONE
adamc@805 2710 else
adamc@805 2711 let
adamc@805 2712 fun mismatched ue =
adamc@1000 2713 (sgnError env (SgiMismatchedDatatypes (strLoc, sgi1All, sgi2All, ue));
adamc@805 2714 SOME env)
adamc@805 2715
adamc@805 2716 val k = (L'.KType, loc)
adamc@805 2717 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 2718
adamc@805 2719 fun good () =
adamc@805 2720 let
adamc@805 2721 val env = E.sgiBinds env sgi1All
adamc@805 2722 val env = if n1 = n2 then
adamc@805 2723 env
adamc@805 2724 else
adamc@838 2725 (cparts (n2, n1);
adamc@838 2726 E.pushCNamedAs env x1 n2 k'
adamc@838 2727 (SOME (L'.CNamed n1, loc)))
adamc@805 2728 in
adamc@805 2729 SOME env
adamc@805 2730 end
adamc@805 2731
adamc@805 2732 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 2733 val env = if n1 = n2 then
adamc@805 2734 env
adamc@805 2735 else
adamc@838 2736 (cparts (n2, n1);
adamc@838 2737 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 2738 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 2739 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 2740 String.compare (x1, x2) <> EQUAL
adamc@805 2741 orelse case (t1, t2) of
adamc@805 2742 (NONE, NONE) => false
adamc@805 2743 | (SOME t1, SOME t2) =>
adamc@987 2744 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 2745 | _ => true
adamc@805 2746 in
adamc@805 2747 (if xs1 <> xs2
adamc@805 2748 orelse length xncs1 <> length xncs2
adamc@805 2749 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 2750 mismatched NONE
adamc@160 2751 else
adamc@805 2752 good ())
adamc@805 2753 handle CUnify ue => mismatched (SOME ue)
adamc@805 2754 end
adamc@805 2755 in
adamc@805 2756 seek'
adamc@805 2757 (fn _ =>
adamc@805 2758 let
adamc@805 2759 fun seekOne (dt2, env) =
adamc@805 2760 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2761 case sgi1 of
adamc@805 2762 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 2763 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 2764 | _ => NONE)
adamc@805 2765
adamc@805 2766 fun seekAll (dts, env) =
adamc@805 2767 case dts of
adamc@805 2768 [] => env
adamc@805 2769 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 2770 in
adamc@805 2771 seekAll (dts2, env)
adamc@805 2772 end)
adamc@805 2773 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2774 let
adamc@805 2775 fun found dts1 =
adamc@805 2776 let
adamc@805 2777 fun iter (dts1, dts2, env) =
adamc@805 2778 case (dts1, dts2) of
adamc@805 2779 ([], []) => SOME env
adamc@805 2780 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 2781 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 2782 NONE => NONE
adamc@805 2783 | SOME env => iter (dts1, dts2, env))
adamc@805 2784 | _ => NONE
adamc@805 2785 in
adamc@805 2786 iter (dts1, dts2, env)
adamc@805 2787 end
adamc@805 2788 in
adamc@805 2789 case sgi1 of
adamc@805 2790 L'.SgiDatatype dts1 => found dts1
adamc@805 2791 | _ => NONE
adamc@805 2792 end)
adamc@805 2793 end
adamc@156 2794
adamc@191 2795 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469 2796 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158 2797 case sgi1 of
adamc@191 2798 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2799 if x = x' then
adamc@158 2800 let
adamc@158 2801 val k = (L'.KType, loc)
adamc@191 2802 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2803 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2804 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2805
adamc@158 2806 fun good () =
adamc@158 2807 let
adamc@191 2808 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2809 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2810 in
adamc@838 2811 cparts (n2, n1);
adamc@628 2812 SOME env
adamc@158 2813 end
adamc@158 2814 in
adamc@987 2815 (unifyCons env loc t1 t2;
adamc@628 2816 good ())
adamc@158 2817 handle CUnify (c1, c2, err) =>
adamc@1000 2818 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@158 2819 good ())
adamc@158 2820 end
adamc@158 2821 else
adamc@158 2822 NONE
adamc@158 2823
adamc@158 2824 | _ => NONE)
adamc@156 2825
adamc@32 2826 | L'.SgiVal (x, n2, c2) =>
adamc@469 2827 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32 2828 case sgi1 of
adamc@41 2829 L'.SgiVal (x', n1, c1) =>
adamc@41 2830 if x = x' then
adamc@838 2831 ((*prefaces "val" [("x", PD.string x),
adamc@838 2832 ("n1", PD.string (Int.toString n1)),
adamc@838 2833 ("c1", p_con env c1),
adamc@838 2834 ("c2", p_con env c2),
adamc@838 2835 ("c2'", p_con env (sub2 c2))];*)
adamc@987 2836 unifyCons env loc c1 (sub2 c2);
adamc@628 2837 SOME env)
adamc@86 2838 handle CUnify (c1, c2, err) =>
adamc@1000 2839 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@628 2840 SOME env)
adamc@41 2841 else
adamc@41 2842 NONE
adamc@32 2843 | _ => NONE)
adamc@32 2844
adamc@33 2845 | L'.SgiStr (x, n2, sgn2) =>
adamc@469 2846 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33 2847 case sgi1 of
adamc@41 2848 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2849 if x = x' then
adamc@66 2850 let
adamc@1000 2851 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@66 2852 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2853 val env = if n1 = n2 then
adamc@66 2854 env
adamc@66 2855 else
adamc@66 2856 E.pushStrNamedAs env x n2
adamc@66 2857 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2858 sgn = sgn2})
adamc@66 2859 in
adamc@628 2860 SOME env
adamc@66 2861 end
adamc@41 2862 else
adamc@41 2863 NONE
adamc@33 2864 | _ => NONE)
adamc@59 2865
adamc@59 2866 | L'.SgiSgn (x, n2, sgn2) =>
adamc@469 2867 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59 2868 case sgi1 of
adamc@59 2869 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2870 if x = x' then
adamc@65 2871 let
adamc@1000 2872 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@1000 2873 val () = subSgn' counterparts env strLoc sgn2 sgn1
adamc@65 2874
adamc@65 2875 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2876 val env = if n1 = n2 then
adamc@65 2877 env
adamc@65 2878 else
adamc@838 2879 (cparts (n2, n1);
adamc@838 2880 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 2881 in
adamc@628 2882 SOME env
adamc@65 2883 end
adamc@59 2884 else
adamc@59 2885 NONE
adamc@59 2886 | _ => NONE)
adamc@88 2887
adamc@88 2888 | L'.SgiConstraint (c2, d2) =>
adamc@469 2889 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88 2890 case sgi1 of
adamc@88 2891 L'.SgiConstraint (c1, d1) =>
adamc@987 2892 if consEq env loc (c1, c2)
adamc@987 2893 andalso consEq env loc (d1, d2) then
adamc@628 2894 SOME env
adamc@88 2895 else
adamc@88 2896 NONE
adamc@88 2897 | _ => NONE)
adamc@203 2898
adamc@563 2899 | L'.SgiClassAbs (x, n2, k2) =>
adamc@469 2900 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2901 let
adamc@563 2902 fun found (x', n1, k1, co) =
adamc@211 2903 if x = x' then
adamc@211 2904 let
adamc@623 2905 val () = unifyKinds env k1 k2
adamc@563 2906 handle KUnify (k1, k2, err) =>
adamc@1000 2907 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2908 sgi2All, k2, err))
adamc@563 2909
adamc@711 2910 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 2911 in
adamc@211 2912 SOME (if n1 = n2 then
adamc@211 2913 env
adamc@211 2914 else
adamc@838 2915 (cparts (n2, n1);
adamc@838 2916 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 2917 end
adamc@211 2918 else
adamc@211 2919 NONE
adamc@211 2920 in
adamc@211 2921 case sgi1 of
adamc@563 2922 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 2923 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 2924 | _ => NONE
adamc@211 2925 end)
adamc@563 2926 | L'.SgiClass (x, n2, k2, c2) =>
adamc@469 2927 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2928 let
adamc@563 2929 fun found (x', n1, k1, c1) =
adamc@211 2930 if x = x' then
adamc@211 2931 let
adamc@623 2932 val () = unifyKinds env k1 k2
adamc@563 2933 handle KUnify (k1, k2, err) =>
adamc@1000 2934 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2935 sgi2All, k2, err))
adamc@563 2936
adamc@838 2937 val c2 = sub2 c2
adamc@838 2938
adamc@218 2939 fun good () =
adamc@218 2940 let
adamc@711 2941 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 2942 val env = if n1 = n2 then
adamc@218 2943 env
adamc@218 2944 else
adamc@839 2945 (cparts (n2, n1);
adamc@839 2946 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 2947 in
adamc@628 2948 SOME env
adamc@218 2949 end
adamc@211 2950 in
adamc@987 2951 (unifyCons env loc c1 c2;
adamc@628 2952 good ())
adamc@211 2953 handle CUnify (c1, c2, err) =>
adamc@1000 2954 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 2955 sgi2All, c2, err));
adamc@211 2956 good ())
adamc@211 2957 end
adamc@211 2958 else
adamc@211 2959 NONE
adamc@211 2960 in
adamc@211 2961 case sgi1 of
adamc@563 2962 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2963 | _ => NONE
adamc@211 2964 end)
adamc@31 2965 end
adamc@31 2966 in
adamc@628 2967 ignore (foldl folder env sgis2)
adamc@31 2968 end
adamc@31 2969
adamc@41 2970 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2971 let
adamc@480 2972 val ran2 =
adamc@43 2973 if n1 = n2 then
adamc@480 2974 ran2
adamc@43 2975 else
adamc@480 2976 subStrInSgn (n2, n1) ran2
adamc@43 2977 in
adamc@1000 2978 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 2979 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 2980 end
adamc@41 2981
adamc@1000 2982 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 2983
adamc@838 2984 and subSgn env = subSgn' (ref IM.empty) env
adamc@61 2985
adamc@706 2986 and positive self =
adamc@312 2987 let
adamc@312 2988 open L
adamc@312 2989
adamc@312 2990 fun none (c, _) =
adamc@312 2991 case c of
adamc@312 2992 CAnnot (c, _) => none c
adamc@312 2993
adamc@312 2994 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 2995 | TCFun (_, _, _, c) => none c
adamc@312 2996 | TRecord c => none c
adamc@312 2997
adamc@312 2998 | CVar ([], x) => x <> self
adamc@312 2999 | CVar _ => true
adamc@312 3000 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3001 | CAbs _ => false
adamc@628 3002 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3003
adamc@623 3004 | CKAbs _ => false
adamc@623 3005 | TKFun _ => false
adamc@623 3006
adamc@312 3007 | CName _ => true
adamc@312 3008
adamc@312 3009 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3010 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3011 | CMap => true
adamc@312 3012
adamc@312 3013 | CUnit => true
adamc@312 3014
adamc@312 3015 | CTuple cs => List.all none cs
adamc@312 3016 | CProj (c, _) => none c
adamc@312 3017
adamc@312 3018 | CWild _ => false
adamc@312 3019
adamc@312 3020 fun pos (c, _) =
adamc@312 3021 case c of
adamc@312 3022 CAnnot (c, _) => pos c
adamc@312 3023
adamc@312 3024 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3025 | TCFun (_, _, _, c) => pos c
adamc@312 3026 | TRecord c => pos c
adamc@312 3027
adamc@312 3028 | CVar _ => true
adamc@312 3029 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3030 | CAbs _ => false
adamc@628 3031 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3032
adamc@623 3033 | CKAbs _ => false
adamc@623 3034 | TKFun _ => false
adamc@623 3035
adamc@312 3036 | CName _ => true
adamc@312 3037
adamc@312 3038 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3039 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3040 | CMap => true
adamc@312 3041
adamc@312 3042 | CUnit => true
adamc@312 3043
adamc@312 3044 | CTuple cs => List.all pos cs
adamc@312 3045 | CProj (c, _) => pos c
adamc@312 3046
adamc@312 3047 | CWild _ => false
adamc@312 3048 in
adamc@312 3049 pos
adamc@312 3050 end
adamc@312 3051
adamc@706 3052 and wildifyStr env (str, sgn) =
adamc@325 3053 case #1 (hnormSgn env sgn) of
adamc@325 3054 L'.SgnConst sgis =>
adamc@325 3055 (case #1 str of
adamc@325 3056 L.StrConst ds =>
adamc@325 3057 let
adamc@493 3058 fun decompileKind (k, loc) =
adamc@493 3059 case k of
adamc@493 3060 L'.KType => SOME (L.KType, loc)
adamc@493 3061 | L'.KArrow (k1, k2) =>
adamc@493 3062 (case (decompileKind k1, decompileKind k2) of
adamc@493 3063 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3064 | _ => NONE)
adamc@493 3065 | L'.KName => SOME (L.KName, loc)
adamc@493 3066 | L'.KRecord k =>
adamc@493 3067 (case decompileKind k of
adamc@493 3068 SOME k => SOME (L.KRecord k, loc)
adamc@493 3069 | _ => NONE)
adamc@493 3070 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3071 | L'.KTuple ks =>
adamc@493 3072 let
adamc@493 3073 val ks' = List.mapPartial decompileKind ks
adamc@493 3074 in
adamc@493 3075 if length ks' = length ks then
adamc@493 3076 SOME (L.KTuple ks', loc)
adamc@493 3077 else
adamc@493 3078 NONE
adamc@493 3079 end
adamc@493 3080
adamc@493 3081 | L'.KError => NONE
adamc@493 3082 | L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493 3083 | L'.KUnif _ => NONE
adamc@493 3084
adamc@623 3085 | L'.KRel _ => NONE
adamc@623 3086 | L'.KFun _ => NONE
adamc@623 3087
adamc@325 3088 fun decompileCon env (c, loc) =
adamc@325 3089 case c of
adamc@325 3090 L'.CRel i =>
adamc@325 3091 let
adamc@325 3092 val (s, _) = E.lookupCRel env i
adamc@325 3093 in
adamc@325 3094 SOME (L.CVar ([], s), loc)
adamc@325 3095 end
adamc@325 3096 | L'.CNamed i =>
adamc@325 3097 let
adamc@325 3098 val (s, _, _) = E.lookupCNamed env i
adamc@325 3099 in
adamc@325 3100 SOME (L.CVar ([], s), loc)
adamc@325 3101 end
adamc@325 3102 | L'.CModProj (m1, ms, x) =>
adamc@325 3103 let
adamc@325 3104 val (s, _) = E.lookupStrNamed env m1
adamc@325 3105 in
adamc@325 3106 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3107 end
adamc@325 3108 | L'.CName s => SOME (L.CName s, loc)
adamc@325 3109 | L'.CRecord (_, xcs) =>
adamc@325 3110 let
adamc@325 3111 fun fields xcs =
adamc@325 3112 case xcs of
adamc@325 3113 [] => SOME []
adamc@325 3114 | (x, t) :: xcs =>
adamc@325 3115 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3116 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3117 | _ => NONE
adamc@325 3118 in
adamc@325 3119 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 3120 (fields xcs)
adamc@325 3121 end
adamc@325 3122 | L'.CConcat (c1, c2) =>
adamc@325 3123 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3124 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3125 | _ => NONE)
adamc@325 3126 | L'.CUnit => SOME (L.CUnit, loc)
adamc@913 3127 | L'.CUnif (_, _, _, ref (SOME c)) => decompileCon env c
adamc@325 3128
adamc@325 3129 | _ => NONE
adamc@325 3130
adamc@469 3131 val (neededC, constraints, neededV, _) =
adamc@469 3132 foldl (fn ((sgi, loc), (neededC, constraints, neededV, env')) =>
adamc@325 3133 let
adamc@469 3134 val (needed, constraints, neededV) =
adamc@325 3135 case sgi of
adamc@913 3136 L'.SgiCon (x, _, k, c) => (SM.insert (neededC, x, (k, SOME c)),
adamc@913 3137 constraints, neededV)
adamc@913 3138 | L'.SgiConAbs (x, _, k) => (SM.insert (neededC, x, (k, NONE)), constraints, neededV)
adamc@469 3139 | L'.SgiConstraint cs => (neededC, (env', cs, loc) :: constraints, neededV)
adamc@469 3140
adamc@469 3141 | L'.SgiVal (x, _, t) =>
adamc@469 3142 let
adamc@469 3143 fun default () = (neededC, constraints, neededV)
adamc@469 3144
adamc@469 3145 val t = normClassConstraint env' t
adamc@469 3146 in
adamc@469 3147 case #1 t of
adamc@469 3148 L'.CApp (f, _) =>
adamc@634 3149 if isClassOrFolder env' f then
adamc@469 3150 (neededC, constraints, SS.add (neededV, x))
adamc@469 3151 else
adamc@469 3152 default ()
adamc@469 3153 | _ => default ()
adamc@469 3154 end
adamc@469 3155
adamc@469 3156 | _ => (neededC, constraints, neededV)
adamc@325 3157 in
adamc@469 3158 (needed, constraints, neededV, E.sgiBinds env' (sgi, loc))
adamc@325 3159 end)
adamc@493 3160 (SM.empty, [], SS.empty, env) sgis
adamc@325 3161
adamc@634 3162 val (neededC, neededV) =
adamc@634 3163 foldl (fn ((d, _), needed as (neededC, neededV)) =>
adamc@634 3164 case d of
adamc@634 3165 L.DCon (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 3166 handle NotFound =>
adamc@634 3167 needed)
adamc@634 3168 | L.DClass (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 3169 handle NotFound => needed)
adamc@634 3170 | L.DVal (x, _, _) => ((neededC, SS.delete (neededV, x))
adamc@634 3171 handle NotFound => needed)
adamc@634 3172 | L.DOpen _ => (SM.empty, SS.empty)
adamc@634 3173 | _ => needed)
adamc@634 3174 (neededC, neededV) ds
adamc@469 3175
adamc@469 3176 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 3177 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 3178 (SOME c1, SOME c2) =>
adamc@325 3179 SOME (L.DConstraint (c1, c2), loc)
adamc@325 3180 | _ => NONE) constraints
adamc@469 3181
adamc@469 3182 val ds' =
adamc@469 3183 case SS.listItems neededV of
adamc@469 3184 [] => ds'
adamc@469 3185 | xs =>
adamc@469 3186 let
adamc@469 3187 val ewild = (L.EWild, #2 str)
adamc@469 3188 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@469 3189 in
adamc@469 3190 ds'' @ ds'
adamc@469 3191 end
adamc@469 3192
adamc@469 3193 val ds' =
adamc@493 3194 case SM.listItemsi neededC of
adamc@469 3195 [] => ds'
adamc@469 3196 | xs =>
adamc@469 3197 let
adamc@913 3198 val ds'' = map (fn (x, (k, co)) =>
adamc@493 3199 let
adamc@493 3200 val k =
adamc@493 3201 case decompileKind k of
adamc@493 3202 NONE => (L.KWild, #2 str)
adamc@493 3203 | SOME k => k
adamc@913 3204
adamc@493 3205 val cwild = (L.CWild k, #2 str)
adamc@913 3206 val c =
adamc@913 3207 case co of
adamc@913 3208 NONE => cwild
adamc@913 3209 | SOME c =>
adamc@913 3210 case decompileCon env c of
adamc@913 3211 NONE => cwild
adamc@913 3212 | SOME c' => c'
adamc@493 3213 in
adamc@913 3214 (L.DCon (x, NONE, c), #2 str)
adamc@493 3215 end) xs
adamc@469 3216 in
adamc@469 3217 ds'' @ ds'
adamc@469 3218 end
adamc@325 3219 in
adamc@469 3220 (L.StrConst (ds @ ds'), #2 str)
adamc@325 3221 end
adamc@325 3222 | _ => str)
adamc@325 3223 | _ => str
adamc@325 3224
adamc@706 3225 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3226 let
adamc@904 3227 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3228 (*val befor = Time.now ()*)
adamc@255 3229
adamc@255 3230 val r =
adamc@255 3231 case d of
adamc@255 3232 L.DCon (x, ko, c) =>
adamc@255 3233 let
adamc@255 3234 val k' = case ko of
adamc@255 3235 NONE => kunif loc
adamc@623 3236 | SOME k => elabKind env k
adamc@255 3237
adamc@255 3238 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3239 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3240 in
adamc@255 3241 checkKind env c' ck k';
adamc@255 3242
adamc@255 3243 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3244 end
adamc@805 3245 | L.DDatatype dts =>
adamc@255 3246 let
adamc@255 3247 val k = (L'.KType, loc)
adamc@805 3248
adamc@805 3249 val (dts, env) = ListUtil.foldlMap
adamc@805 3250 (fn ((x, xs, xcs), env) =>
adamc@805 3251 let
adamc@805 3252 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3253 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3254 in
adamc@805 3255 ((x, n, xs, xcs), env)
adamc@805 3256 end)
adamc@805 3257 env dts
adamc@805 3258
adamc@805 3259 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3260 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3261 let
adamc@805 3262 val t = (L'.CNamed n, loc)
adamc@805 3263 val nxs = length xs - 1
adamc@805 3264 val t = ListUtil.foldli
adamc@805 3265 (fn (i, _, t) =>
adamc@805 3266 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3267
adamc@805 3268 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3269 (E.pushCRel env' x k,
adamc@805 3270 D.enter denv')) (env, denv) xs
adamc@805 3271
adamc@805 3272 val (xcs, (used, env, gs')) =
adamc@805 3273 ListUtil.foldlMap
adamc@805 3274 (fn ((x, to), (used, env, gs)) =>
adamc@805 3275 let
adamc@805 3276 val (to, t, gs') = case to of
adamc@805 3277 NONE => (NONE, t, gs)
adamc@805 3278 | SOME t' =>
adamc@805 3279 let
adamc@805 3280 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3281 in
adamc@805 3282 checkKind env' t' tk k;
adamc@805 3283 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3284 end
adamc@805 3285 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3286
adamc@805 3287 val (env, n') = E.pushENamed env x t
adamc@805 3288 in
adamc@805 3289 if SS.member (used, x) then
adamc@805 3290 strError env (DuplicateConstructor (x, loc))
adamc@805 3291 else
adamc@805 3292 ();
adamc@805 3293 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3294 end)
adamc@805 3295 (SS.empty, env, gs') xcs
adamc@805 3296 in
adamc@805 3297 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3298 end)
adamc@805 3299 (env, []) dts
adamc@255 3300 in
adamc@805 3301 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3302 end
adamc@255 3303
adamc@255 3304 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3305
adamc@255 3306 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3307 (case E.lookupStr env m1 of
adamc@255 3308 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3309 ([], (env, denv, gs)))
adamc@255 3310 | SOME (n, sgn) =>
adamc@255 3311 let
adamc@255 3312 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3313 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3314 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3315 (strerror, sgnerror))
adamc@255 3316 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3317 ((L'.StrVar n, loc), sgn) ms
adamc@255 3318 in
adamc@628 3319 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3320 (L'.CModProj (n, ms, s), _) =>
adamc@255 3321 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3322 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3323 ([], (env, denv, gs)))
adamc@255 3324 | SOME (xs, xncs) =>
adamc@255 3325 let
adamc@255 3326 val k = (L'.KType, loc)
adamc@255 3327 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3328 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3329 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3330 val env = E.pushDatatype env n' xs xncs
adamc@255 3331
adamc@255 3332 val t = (L'.CNamed n', loc)
adamc@844 3333 val nxs = length xs
adamc@844 3334 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3335 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3336 t xs
adamc@255 3337 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3338 let
adamc@255 3339 val t = case to of
adamc@255 3340 NONE => t
adamc@255 3341 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3342
adamc@255 3343 val t = foldr (fn (x, t) =>
adamc@255 3344 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3345 t xs
adamc@255 3346 in
adamc@255 3347 E.pushENamedAs env x n t
adamc@255 3348 end) env xncs
adamc@255 3349 in
adamc@628 3350 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3351 end)
adamc@255 3352 | _ => (strError env (NotDatatype loc);
adamc@255 3353 ([], (env, denv, [])))
adamc@255 3354 end)
adamc@255 3355
adamc@255 3356 | L.DVal (x, co, e) =>
adamc@255 3357 let
adamc@255 3358 val (c', _, gs1) = case co of
adamc@255 3359 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3360 | SOME c => elabCon (env, denv) c
adamc@255 3361
adamc@255 3362 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3363
adamc@629 3364 val () = checkCon env e' et c'
adamc@629 3365
adamc@674 3366 val c' = normClassConstraint env c'
adamc@255 3367 val (env', n) = E.pushENamed env x c'
adamc@255 3368 in
adamc@255 3369 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3370 ("c'", p_con env c')];*)
adamc@628 3371 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3372 end
adamc@255 3373 | L.DValRec vis =>
adamc@255 3374 let
adamc@255 3375 fun allowable (e, _) =
adamc@255 3376 case e of
adamc@255 3377 L.EAbs _ => true
adamc@255 3378 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3379 | L.EKAbs (_, e) => allowable e
adamc@255 3380 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3381 | _ => false
adamc@255 3382
adamc@255 3383 val (vis, gs) = ListUtil.foldlMap
adamc@255 3384 (fn ((x, co, e), gs) =>
adamc@255 3385 let
adamc@255 3386 val (c', _, gs1) = case co of
adamc@255 3387 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3388 | SOME c => elabCon (env, denv) c
adamc@674 3389 val c' = normClassConstraint env c'
adamc@255 3390 in
adamc@255 3391 ((x, c', e), enD gs1 @ gs)
adamc@280 3392 end) gs vis
adamc@255 3393
adamc@255 3394 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3395 let
adamc@255 3396 val (env, n) = E.pushENamed env x c'
adamc@255 3397 in
adamc@255 3398 ((x, n, c', e), env)
adamc@255 3399 end) env vis
adamc@255 3400
adamc@255 3401 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3402 let
adamc@255 3403 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3404 in
adamc@628 3405 checkCon env e' et c';
adamc@255 3406 if allowable e then
adamc@255 3407 ()
adamc@255 3408 else
adamc@255 3409 expError env (IllegalRec (x, e'));
adamc@628 3410 ((x, n, c', e'), gs1 @ gs)
adamc@255 3411 end) gs vis
adamc@255 3412 in
adamc@255 3413 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 3414 end
adamc@255 3415
adamc@255 3416 | L.DSgn (x, sgn) =>
adamc@255 3417 let
adamc@255 3418 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3419 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3420 in
adamc@255 3421 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3422 end
adamc@255 3423
adamc@255 3424 | L.DStr (x, sgno, str) =>
adamc@255 3425 let
adamc@255 3426 val () = if x = "Basis" then
adamc@255 3427 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3428 else
adamc@255 3429 ()
adamc@255 3430
adamc@255 3431 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3432
adamc@255 3433 val (str', sgn', gs') =
adamc@255 3434 case formal of
adamc@255 3435 NONE =>
adamc@255 3436 let
adamc@255 3437 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3438 in
adamc@255 3439 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3440 end
adamc@255 3441 | SOME (formal, gs1) =>
adamc@255 3442 let
adamc@325 3443 val str = wildifyStr env (str, formal)
adamc@255 3444 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3445 in
adamc@1000 3446 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3447 (str', formal, enD gs1 @ gs2)
adamc@255 3448 end
adamc@255 3449
adamc@255 3450 val (env', n) = E.pushStrNamed env x sgn'
adamc@834 3451 val denv' =
adamc@834 3452 case #1 str' of
adamc@834 3453 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022 3454 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834 3455 | _ => denv
adamc@255 3456 in
adamc@255 3457 case #1 (hnormSgn env sgn') of
adamc@255 3458 L'.SgnFun _ =>
adamc@255 3459 (case #1 str' of
adamc@255 3460 L'.StrFun _ => ()
adamc@255 3461 | _ => strError env (FunctorRebind loc))
adamc@255 3462 | _ => ();
adamc@834 3463 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255 3464 end
adamc@255 3465
adamc@255 3466 | L.DFfiStr (x, sgn) =>
adamc@255 3467 let
adamc@255 3468 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3469
adamc@255 3470 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3471 in
adamc@255 3472 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3473 end
adamc@255 3474
adamc@255 3475 | L.DOpen (m, ms) =>
adamc@255 3476 (case E.lookupStr env m of
adamc@255 3477 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3478 ([], (env, denv, gs)))
adamc@255 3479 | SOME (n, sgn) =>
adamc@255 3480 let
adamc@1030 3481 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 3482 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 3483 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 3484 (strerror, sgnerror))
adamc@1030 3485 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 3486 ((L'.StrVar n, loc), sgn) ms
adamc@1030 3487
adamc@1030 3488 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 3489
adamc@628 3490 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 3491 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 3492 in
adamc@255 3493 (ds, (env', denv', gs))
adamc@255 3494 end)
adamc@255 3495
adamc@255 3496 | L.DConstraint (c1, c2) =>
adamc@255 3497 let
adamc@255 3498 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3499 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3500 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3501
adamc@628 3502 val denv' = D.assert env denv (c1', c2')
adamc@255 3503 in
adamc@255 3504 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3505 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3506
adamc@628 3507 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 3508 end
adamc@255 3509
adamc@255 3510 | L.DOpenConstraints (m, ms) =>
adamc@255 3511 let
adamc@255 3512 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3513 in
adamc@255 3514 ([], (env, denv, gs))
adamc@255 3515 end
adamc@255 3516
adamc@255 3517 | L.DExport str =>
adamc@255 3518 let
adamc@255 3519 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3520
adamc@255 3521 val sgn =
adamc@255 3522 case #1 (hnormSgn env sgn) of
adamc@255 3523 L'.SgnConst sgis =>
adamc@255 3524 let
adamc@255 3525 fun doOne (all as (sgi, _), env) =
adamc@255 3526 (case sgi of
adamc@255 3527 L'.SgiVal (x, n, t) =>
adamc@325 3528 let
adamc@325 3529 fun doPage (makeRes, ran) =
adamc@628 3530 case hnormCon env ran of
adamc@628 3531 (L'.CApp (tf, arg), _) =>
adamc@628 3532 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 3533 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 3534 (L'.CApp (tf, arg3), _)) =>
adamc@325 3535 (case (basis = !basis_r,
adamc@720 3536 hnormCon env tf, hnormCon env arg3) of
adamc@325 3537 (true,
adamc@720 3538 (L'.CApp (tf, arg2), _),
adamc@628 3539 ((L'.CRecord (_, []), _))) =>
adamc@720 3540 (case (hnormCon env tf) of
adamc@720 3541 (L'.CApp (tf, arg1), _) =>
adamc@720 3542 (case (hnormCon env tf,
adamc@720 3543 hnormCon env arg1,
adamc@720 3544 hnormCon env arg2) of
adamc@720 3545 (tf, arg1,
adamc@720 3546 (L'.CRecord (_, []), _)) =>
adamc@720 3547 let
adamc@720 3548 val t = (L'.CApp (tf, arg1), loc)
adamc@720 3549 val t = (L'.CApp (t, arg2), loc)
adamc@720 3550 val t = (L'.CApp (t, arg3), loc)
adamc@720 3551 val t = (L'.CApp (
adamc@720 3552 (L'.CModProj
adamc@720 3553 (basis, [], "transaction"), loc),
adamc@325 3554 t), loc)
adamc@720 3555 in
adamc@720 3556 (L'.SgiVal (x, n, makeRes t), loc)
adamc@720 3557 end
adamc@325 3558 | _ => all)
adamc@325 3559 | _ => all)
adamc@325 3560 | _ => all)
adamc@325 3561 | _ => all)
adamc@325 3562 | _ => all
adamc@325 3563 in
adamc@628 3564 case hnormCon env t of
adamc@628 3565 (L'.TFun (dom, ran), _) =>
adamc@628 3566 (case hnormCon env dom of
adamc@628 3567 (L'.TRecord domR, _) =>
adamc@325 3568 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3569 loc),
adamc@325 3570 t), loc), ran)
adamc@325 3571 | _ => all)
adamc@325 3572 | _ => doPage (fn t => t, t)
adamc@325 3573 end
adamc@255 3574 | _ => all,
adamc@255 3575 E.sgiBinds env all)
adamc@255 3576 in
adamc@255 3577 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3578 end
adamc@255 3579 | _ => sgn
adamc@255 3580 in
adamc@255 3581 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3582 end
adamc@255 3583
adamc@707 3584 | L.DTable (x, c, pe, ce) =>
adamc@255 3585 let
adamc@707 3586 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 3587
adamc@255 3588 val (c', k, gs') = elabCon (env, denv) c
adamc@707 3589 val pkey = cunif (loc, cstK)
adamc@707 3590 val uniques = cunif (loc, cstK)
adamc@705 3591
adamc@705 3592 val ct = tableOf ()
adamc@705 3593 val ct = (L'.CApp (ct, c'), loc)
adamc@707 3594 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 3595
adamc@705 3596 val (env, n) = E.pushENamed env x ct
adamc@707 3597 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 3598 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 3599
adamc@707 3600 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 3601 val pst = (L'.CApp (pst, c'), loc)
adamc@707 3602 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 3603
adamc@704 3604 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 3605 val cst = (L'.CApp (cst, c'), loc)
adamc@705 3606 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 3607 in
adamc@255 3608 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 3609 checkCon env pe' pet pst;
adamc@707 3610 checkCon env ce' cet cst;
adamc@707 3611 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 3612 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 3613 end
adamc@338 3614 | L.DSequence x =>
adamc@338 3615 let
adamc@338 3616 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3617 in
adamc@338 3618 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3619 end
adamc@754 3620 | L.DView (x, e) =>
adamc@754 3621 let
adamc@754 3622 val (e', t, gs') = elabExp (env, denv) e
adamc@754 3623
adamc@754 3624 val k = (L'.KRecord (L'.KType, loc), loc)
adamc@754 3625 val fs = cunif (loc, k)
adamc@754 3626 val ts = cunif (loc, (L'.KRecord k, loc))
adamc@754 3627 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 3628 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 3629 val ts = (L'.CApp (tf, ts), loc)
adamc@754 3630
adamc@754 3631 val cv = viewOf ()
adamc@754 3632 val cv = (L'.CApp (cv, fs), loc)
adamc@754 3633 val (env', n) = E.pushENamed env x cv
adamc@754 3634
adamc@754 3635 val ct = queryOf ()
adamc@754 3636 val ct = (L'.CApp (ct, ts), loc)
adamc@754 3637 val ct = (L'.CApp (ct, fs), loc)
adamc@754 3638 in
adamc@754 3639 checkCon env e' t ct;
adamc@754 3640 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 3641 (env', denv, gs' @ gs))
adamc@754 3642 end
adamc@255 3643
adamc@563 3644 | L.DClass (x, k, c) =>
adamc@255 3645 let
adamc@623 3646 val k = elabKind env k
adamc@280 3647 val (c', ck, gs') = elabCon (env, denv) c
adamc@711 3648 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3649 val env = E.pushClass env n
adamc@255 3650 in
adamc@711 3651 checkKind env c' ck k;
adamc@563 3652 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3653 end
adamc@271 3654
adamc@280 3655 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3656
adamc@459 3657 | L.DCookie (x, c) =>
adamc@459 3658 let
adamc@459 3659 val (c', k, gs') = elabCon (env, denv) c
adamc@459 3660 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 3661 in
adamc@459 3662 checkKind env c' k (L'.KType, loc);
adamc@459 3663 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 3664 end
adamc@720 3665 | L.DStyle x =>
adamc@718 3666 let
adamc@720 3667 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 3668 in
adamc@720 3669 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 3670 end
adamc@459 3671
adamc@280 3672 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3673 in
adamc@904 3674 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];*)
adamc@255 3675 r
adamc@255 3676 end
adamc@211 3677
adamc@83 3678 and elabStr (env, denv) (str, loc) =
adamc@31 3679 case str of
adamc@31 3680 L.StrConst ds =>
adamc@31 3681 let
adamc@88 3682 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3683 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3684
adamc@63 3685 val (sgis, _, _, _, _) =
adamc@64 3686 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3687 case sgi of
adamc@64 3688 L'.SgiConAbs (x, n, k) =>
adamc@64 3689 let
adamc@64 3690 val (cons, x) =
adamc@64 3691 if SS.member (cons, x) then
adamc@64 3692 (cons, "?" ^ x)
adamc@64 3693 else
adamc@64 3694 (SS.add (cons, x), x)
adamc@64 3695 in
adamc@64 3696 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3697 end
adamc@64 3698 | L'.SgiCon (x, n, k, c) =>
adamc@64 3699 let
adamc@64 3700 val (cons, x) =
adamc@64 3701 if SS.member (cons, x) then
adamc@64 3702 (cons, "?" ^ x)
adamc@64 3703 else
adamc@64 3704 (SS.add (cons, x), x)
adamc@64 3705 in
adamc@64 3706 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3707 end
adamc@805 3708 | L'.SgiDatatype dts =>
adamc@156 3709 let
adamc@805 3710 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 3711 let
adamc@805 3712 val (cons, x) =
adamc@805 3713 if SS.member (cons, x) then
adamc@805 3714 (cons, "?" ^ x)
adamc@156 3715 else
adamc@805 3716 (SS.add (cons, x), x)
adamc@805 3717
adamc@805 3718 val (xncs, vals) =
adamc@805 3719 ListUtil.foldlMap
adamc@805 3720 (fn ((x, n, t), vals) =>
adamc@805 3721 if SS.member (vals, x) then
adamc@805 3722 (("?" ^ x, n, t), vals)
adamc@805 3723 else
adamc@805 3724 ((x, n, t), SS.add (vals, x)))
adamc@805 3725 vals xncs
adamc@805 3726 in
adamc@805 3727 ((x, n, xs, xncs), (cons, vals))
adamc@805 3728 end
adamc@805 3729
adamc@805 3730 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 3731 in
adamc@805 3732 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3733 end
adamc@191 3734 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3735 let
adamc@156 3736 val (cons, x) =
adamc@156 3737 if SS.member (cons, x) then
adamc@156 3738 (cons, "?" ^ x)
adamc@156 3739 else
adamc@156 3740 (SS.add (cons, x), x)
adamc@156 3741 in
adamc@191 3742 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3743 end
adamc@64 3744 | L'.SgiVal (x, n, c) =>
adamc@64 3745 let
adamc@64 3746 val (vals, x) =
adamc@64 3747 if SS.member (vals, x) then
adamc@64 3748 (vals, "?" ^ x)
adamc@64 3749 else
adamc@64 3750 (SS.add (vals, x), x)
adamc@64 3751 in
adamc@64 3752 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3753 end
adamc@64 3754 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3755 let
adamc@64 3756 val (sgns, x) =
adamc@64 3757 if SS.member (sgns, x) then
adamc@64 3758 (sgns, "?" ^ x)
adamc@64 3759 else
adamc@64 3760 (SS.add (sgns, x), x)
adamc@64 3761 in
adamc@64 3762 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3763 end
adamc@64 3764
adamc@64 3765 | L'.SgiStr (x, n, sgn) =>
adamc@64 3766 let
adamc@64 3767 val (strs, x) =
adamc@64 3768 if SS.member (strs, x) then
adamc@64 3769 (strs, "?" ^ x)
adamc@64 3770 else
adamc@64 3771 (SS.add (strs, x), x)
adamc@64 3772 in
adamc@64 3773 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3774 end
adamc@203 3775 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 3776 | L'.SgiClassAbs (x, n, k) =>
adamc@211 3777 let
adamc@211 3778 val (cons, x) =
adamc@211 3779 if SS.member (cons, x) then
adamc@211 3780 (cons, "?" ^ x)
adamc@211 3781 else
adamc@211 3782 (SS.add (cons, x), x)
adamc@211 3783 in
adamc@563 3784 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3785 end
adamc@563 3786 | L'.SgiClass (x, n, k, c) =>
adamc@211 3787 let
adamc@211 3788 val (cons, x) =
adamc@211 3789 if SS.member (cons, x) then
adamc@211 3790 (cons, "?" ^ x)
adamc@211 3791 else
adamc@211 3792 (SS.add (cons, x), x)
adamc@211 3793 in
adamc@563 3794 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3795 end)
adamc@64 3796
adamc@63 3797 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3798 in
adamc@83 3799 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3800 end
adamc@31 3801 | L.StrVar x =>
adamc@31 3802 (case E.lookupStr env x of
adamc@31 3803 NONE =>
adamc@31 3804 (strError env (UnboundStr (loc, x));
adamc@83 3805 (strerror, sgnerror, []))
adamc@83 3806 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3807 | L.StrProj (str, x) =>
adamc@34 3808 let
adamc@83 3809 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3810 in
adamc@34 3811 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3812 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3813 (strerror, sgnerror, []))
adamc@83 3814 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3815 end
adamc@41 3816 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3817 let
adamc@83 3818 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3819 val (env', n) = E.pushStrNamed env m dom'
adamc@834 3820 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 3821 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 3822
adamc@83 3823 val (formal, gs3) =
adamc@41 3824 case ranO of
adamc@83 3825 NONE => (actual, [])
adamc@41 3826 | SOME ran =>
adamc@41 3827 let
adamc@834 3828 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 3829 in
adamc@1000 3830 subSgn env' loc actual ran';
adamc@83 3831 (ran', gs)
adamc@41 3832 end
adamc@41 3833 in
adamc@41 3834 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3835 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3836 enD gs1 @ gs2 @ enD gs3)
adamc@41 3837 end
adamc@44 3838 | L.StrApp (str1, str2) =>
adamc@44 3839 let
adamc@83 3840 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3841 val str2 =
adamc@325 3842 case sgn1 of
adamc@325 3843 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3844 wildifyStr env (str2, dom)
adamc@325 3845 | _ => str2
adamc@83 3846 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3847 in
adamc@44 3848 case #1 (hnormSgn env sgn1) of
adamc@83 3849 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3850 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 3851 (subSgn env loc sgn2 dom;
adamc@44 3852 case #1 (hnormSgn env ran) of
adamc@83 3853 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3854 | L'.SgnConst sgis =>
adamc@44 3855 ((L'.StrApp (str1', str2'), loc),
adamc@83 3856 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3857 gs1 @ gs2)
adamc@44 3858 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3859 | _ => (strError env (NotFunctor sgn1);
adamc@83 3860 (strerror, sgnerror, []))
adamc@44 3861 end
adamc@31 3862
adamc@987 3863 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 3864
adamc@325 3865 fun elabFile basis topStr topSgn env file =
adamc@56 3866 let
adamc@713 3867 val () = mayDelay := true
adamc@713 3868 val () = delayedUnifs := []
adamc@830 3869 val () = delayedExhaustives := []
adamc@713 3870
adamc@83 3871 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3872 val () = case gs of
adamc@83 3873 [] => ()
adamc@207 3874 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3875 prefaces "Unresolved"
adamc@207 3876 [("c1", p_con env c1),
adamc@207 3877 ("c2", p_con env c2)]) gs;
adamc@207 3878 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3879
adamc@56 3880 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3881 val () = basis_r := basis_n
adamc@56 3882
adamc@628 3883 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 3884
adamc@56 3885 fun discoverC r x =
adamc@56 3886 case E.lookupC env' x of
adamc@56 3887 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3888 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3889 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3890
adamc@56 3891 val () = discoverC int "int"
adamc@56 3892 val () = discoverC float "float"
adamc@56 3893 val () = discoverC string "string"
adamc@821 3894 val () = discoverC char "char"
adamc@203 3895 val () = discoverC table "sql_table"
adamc@56 3896
adamc@325 3897 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3898 val () = case gs of
adamc@325 3899 [] => ()
adamc@325 3900 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3901 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3902 val () = case gs of
adamc@325 3903 [] => ()
adamc@329 3904 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3905 (case D.prove env denv (c1, c2, loc) of
adamc@329 3906 [] => ()
adamc@329 3907 | _ =>
adamc@329 3908 (prefaces "Unresolved constraint in top.ur"
adamc@329 3909 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3910 ("c1", p_con env c1),
adamc@720 3911 ("c2", p_con env c2)];
adamc@478 3912 raise Fail "Unresolved constraint in top.ur"))
adamc@564 3913 | TypeClass (env, c, r, loc) =>
adamc@564 3914 let
adamc@564 3915 val c = normClassKey env c
adamc@564 3916 in
adamc@833 3917 case resolveClass env c of
adamc@564 3918 SOME e => r := SOME e
adamc@564 3919 | NONE => expError env (Unresolvable (loc, c))
adamc@634 3920 end) gs
adamc@564 3921
adamc@1000 3922 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720 3923
adamc@325 3924 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633 3925 val () = top_r := top_n
adamc@325 3926
adamc@628 3927 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 3928
adamc@713 3929 val checks = ref ([] : (unit -> unit) list)
adamc@713 3930
adamc@83 3931 fun elabDecl' (d, (env, gs)) =
adamc@76 3932 let
adamc@76 3933 val () = resetKunif ()
adamc@76 3934 val () = resetCunif ()
adamc@88 3935 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3936 in
adamc@713 3937 checks :=
adamc@713 3938 (fn () =>
adamc@713 3939 (if List.exists kunifsInDecl ds then
adamc@713 3940 declError env (KunifsRemain ds)
adamc@713 3941 else
adamc@713 3942 ();
adamc@713 3943
adamc@713 3944 case ListUtil.search cunifsInDecl ds of
adamc@713 3945 NONE => ()
adamc@713 3946 | SOME loc =>
adamc@713 3947 declError env (CunifsRemain ds)))
adamc@713 3948 :: !checks;
adamc@76 3949
adamc@83 3950 (ds, (env, gs))
adamc@76 3951 end
adamc@76 3952
adamc@83 3953 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753 3954
adamc@777 3955 fun oneSummaryRound () =
adamc@777 3956 if ErrorMsg.anyErrors () then
adamc@777 3957 ()
adamc@777 3958 else
adamc@777 3959 let
adamc@777 3960 val delayed = !delayedUnifs
adamc@777 3961 in
adamc@777 3962 delayedUnifs := [];
adamc@777 3963 app (fn (loc, env, k, s1, s2) =>
adamc@777 3964 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 3965 delayed
adamc@777 3966 end
adamc@56 3967 in
adamc@777 3968 oneSummaryRound ();
adamc@753 3969
adamc@753 3970 if ErrorMsg.anyErrors () then
adamc@753 3971 ()
adamc@753 3972 else
adamc@753 3973 let
adamc@753 3974 fun solver gs =
adamc@753 3975 let
adamc@753 3976 val (gs, solved) =
adamc@753 3977 ListUtil.foldlMapPartial
adamc@753 3978 (fn (g, solved) =>
adamc@753 3979 case g of
adamc@753 3980 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 3981 (case D.prove env denv (c1, c2, loc) of
adamc@753 3982 [] => (NONE, true)
adamc@753 3983 | _ => (SOME g, solved))
adamc@753 3984 | TypeClass (env, c, r, loc) =>
adamc@753 3985 let
adamc@753 3986 fun default () = (SOME g, solved)
adamc@753 3987
adamc@753 3988 val c = normClassKey env c
adamc@753 3989 in
adamc@833 3990 case resolveClass env c of
adamc@753 3991 SOME e => (r := SOME e;
adamc@753 3992 (NONE, true))
adamc@753 3993 | NONE =>
adamc@753 3994 case #1 (hnormCon env c) of
adamc@753 3995 L'.CApp (f, x) =>
adamc@753 3996 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753 3997 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753 3998 (case #1 (hnormCon env f) of
adamc@753 3999 L'.CModProj (top_n', [], "folder") =>
adamc@753 4000 if top_n' = top_n then
adamc@753 4001 let
adamc@753 4002 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753 4003 val e = (L'.EKApp (e, k), loc)
adamc@753 4004
adamc@753 4005 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753 4006 let
adamc@753 4007 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753 4008 "cons"), loc)
adamc@753 4009 val e = (L'.EKApp (e, k), loc)
adamc@753 4010 val e = (L'.ECApp (e,
adamc@753 4011 (L'.CRecord (k, xcs),
adamc@753 4012 loc)), loc)
adamc@753 4013 val e = (L'.ECApp (e, x), loc)
adamc@753 4014 val e = (L'.ECApp (e, c), loc)
adamc@753 4015 val e = (L'.EApp (e, folder), loc)
adamc@753 4016 in
adamc@753 4017 (e, (x, c) :: xcs)
adamc@753 4018 end)
adamc@753 4019 (e, []) xcs
adamc@753 4020 in
adamc@753 4021 (r := SOME folder;
adamc@753 4022 (NONE, true))
adamc@753 4023 end
adamc@753 4024 else
adamc@753 4025 default ()
adamc@753 4026 | _ => default ())
adamc@753 4027 | _ => default ())
adamc@753 4028 | _ => default ()
adamc@753 4029 end)
adamc@753 4030 false gs
adamc@753 4031 in
adamc@753 4032 case (gs, solved) of
adamc@753 4033 ([], _) => ()
adamc@777 4034 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4035 | _ =>
adamc@753 4036 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@1048 4037 let
adamc@1048 4038 val c1' = ElabOps.hnormCon env c1
adamc@1048 4039 val c2' = ElabOps.hnormCon env c2
adamc@1048 4040
adamc@1048 4041 fun isUnif (c, _) =
adamc@1048 4042 case c of
adamc@1048 4043 L'.CUnif _ => true
adamc@1048 4044 | _ => false
adamc@1048 4045
adamc@1048 4046 fun maybeAttr (c, _) =
adamc@1048 4047 case c of
adamc@1048 4048 L'.CRecord ((L'.KType, _), xts) => true
adamc@1048 4049 | _ => false
adamc@1048 4050 in
adamc@1048 4051 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@1048 4052 eprefaces' [("Con 1", p_con env c1),
adamc@1048 4053 ("Con 2", p_con env c2),
adamc@1048 4054 ("Hnormed 1", p_con env c1'),
adamc@1048 4055 ("Hnormed 2", p_con env c2')];
adamc@1048 4056
adamc@1048 4057 if (isUnif c1' andalso maybeAttr c2')
adamc@1048 4058 orelse (isUnif c2' andalso maybeAttr c1') then
adamc@1048 4059 TextIO.output (TextIO.stdErr,
adamc@1048 4060 "You may be using a disallowed attribute with an HTML tag.\n")
adamc@1048 4061 else
adamc@1048 4062 ()
adamc@1048 4063 end
adamc@753 4064 | TypeClass (env, c, r, loc) =>
adamc@753 4065 expError env (Unresolvable (loc, c)))
adamc@753 4066 gs
adamc@753 4067 end
adamc@753 4068 in
adamc@753 4069 solver gs
adamc@753 4070 end;
adamc@753 4071
adamc@713 4072 mayDelay := false;
adamc@713 4073
adamc@777 4074 if ErrorMsg.anyErrors () then
adamc@777 4075 ()
adamc@777 4076 else
adamc@777 4077 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4078 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777 4079 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adamc@777 4080 cunifyError env err))
adamc@777 4081 (!delayedUnifs);
adamc@777 4082 delayedUnifs := []);
adamc@713 4083
adamc@713 4084 if ErrorMsg.anyErrors () then
adamc@713 4085 ()
adamc@713 4086 else
adamc@750 4087 app (fn f => f ()) (!checks);
adamc@750 4088
adamc@830 4089 if ErrorMsg.anyErrors () then
adamc@830 4090 ()
adamc@830 4091 else
adamc@837 4092 app (fn all as (env, _, _, loc) =>
adamc@830 4093 case exhaustive all of
adamc@830 4094 NONE => ()
adamc@830 4095 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4096 (!delayedExhaustives);
adamc@830 4097
adamc@799 4098 (*preface ("file", p_file env' file);*)
adamc@799 4099
adamc@325 4100 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4101 :: ds
adamc@325 4102 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4103 :: ds' @ file
adamc@56 4104 end
adamc@2 4105
adamc@2 4106 end