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annotate src/elaborate.sml @ 1298:e665527fce1c

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Support empty datatypes, which can now be generated via 'variant []'
author Adam Chlipala <adam@chlipala.net>
date Thu, 09 Sep 2010 12:42:25 -0400
parents b4480a56cab7
children 3c334458c84f
rev   line source
adamc@1191 1 (* Copyright (c) 2008-2010, Adam Chlipala
adamc@445 2 * All rights reserved.
adamc@445 3 *
adamc@445 4 * Redistribution and use in source and binary forms, with or without
adamc@445 5 * modification, are permitted provided that the following conditions are met:
adamc@445 6 *
adamc@445 7 * - Redistributions of source code must retain the above copyright notice,
adamc@445 8 * this list of conditions and the following disclaimer.
adamc@445 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445 10 * this list of conditions and the following disclaimer in the documentation
adamc@445 11 * and/or other materials provided with the distribution.
adamc@445 12 * - The names of contributors may not be used to endorse or promote products
adamc@445 13 * derived from this software without specific prior written permission.
adamc@445 14 *
adamc@445 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445 26 *)
adamc@403 27
adamc@403 28 structure Elaborate :> ELABORATE = struct
adamc@403 29
adamc@403 30 structure P = Prim
adamc@403 31 structure L = Source
adamc@403 32 structure L' = Elab
adamc@403 33 structure E = ElabEnv
adamc@403 34 structure U = ElabUtil
adamc@403 35 structure D = Disjoint
adamc@403 36
adamc@403 37 open Print
adamc@403 38 open ElabPrint
adamc@403 39 open ElabErr
adamc@403 40
adamc@819 41 structure IS = IntBinarySet
adamc@403 42 structure IM = IntBinaryMap
adamc@403 43
adamc@403 44 structure SK = struct
adamc@403 45 type ord_key = string
adamc@403 46 val compare = String.compare
adamc@403 47 end
adamc@403 48
adamc@403 49 structure SS = BinarySetFn(SK)
adamc@403 50 structure SM = BinaryMapFn(SK)
adamc@403 51
adamc@403 52 val basis_r = ref 0
adamc@633 53 val top_r = ref 0
adamc@403 54
adamc@403 55 fun elabExplicitness e =
adamc@403 56 case e of
adamc@403 57 L.Explicit => L'.Explicit
adamc@403 58 | L.Implicit => L'.Implicit
adamc@403 59
adamc@403 60 fun occursKind r =
adamc@403 61 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 62 | _ => false)
adamc@403 63
adamc@403 64 exception KUnify' of kunify_error
adamc@403 65
adamc@623 66 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 67 let
adamc@403 68 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403 69 in
adamc@403 70 case (k1, k2) of
adamc@403 71 (L'.KType, L'.KType) => ()
adamc@403 72 | (L'.KUnit, L'.KUnit) => ()
adamc@403 73
adamc@403 74 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623 75 (unifyKinds' env d1 d2;
adamc@623 76 unifyKinds' env r1 r2)
adamc@403 77 | (L'.KName, L'.KName) => ()
adamc@623 78 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403 79 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623 80 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403 81 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 82
adamc@623 83 | (L'.KRel n1, L'.KRel n2) =>
adamc@623 84 if n1 = n2 then
adamc@623 85 ()
adamc@623 86 else
adamc@623 87 err KIncompatible
adamc@623 88 | (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623 89 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623 90
adamc@403 91 | (L'.KError, _) => ()
adamc@403 92 | (_, L'.KError) => ()
adamc@403 93
adamc@623 94 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' env k1All k2All
adamc@623 95 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' env k1All k2All
adamc@403 96
adamc@403 97 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403 98 if r1 = r2 then
adamc@403 99 ()
adamc@403 100 else
adamc@403 101 r1 := SOME k2All
adamc@403 102
adamc@403 103 | (L'.KUnif (_, _, r), _) =>
adamc@403 104 if occursKind r k2All then
adamc@403 105 err KOccursCheckFailed
adamc@403 106 else
adamc@403 107 r := SOME k2All
adamc@403 108 | (_, L'.KUnif (_, _, r)) =>
adamc@403 109 if occursKind r k1All then
adamc@403 110 err KOccursCheckFailed
adamc@403 111 else
adamc@403 112 r := SOME k1All
adamc@403 113
adamc@403 114 | _ => err KIncompatible
adamc@403 115 end
adamc@403 116
adamc@403 117 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403 118
adamc@623 119 fun unifyKinds env k1 k2 =
adamc@623 120 unifyKinds' env k1 k2
adamc@403 121 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403 122
adamc@403 123 fun checkKind env c k1 k2 =
adamc@623 124 unifyKinds env k1 k2
adamc@403 125 handle KUnify (k1, k2, err) =>
adamc@403 126 conError env (WrongKind (c, k1, k2, err))
adamc@403 127
adamc@403 128 val dummy = ErrorMsg.dummySpan
adamc@403 129
adamc@403 130 val ktype = (L'.KType, dummy)
adamc@403 131 val kname = (L'.KName, dummy)
adamc@403 132 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 133
adamc@403 134 val cerror = (L'.CError, dummy)
adamc@403 135 val kerror = (L'.KError, dummy)
adamc@403 136 val eerror = (L'.EError, dummy)
adamc@403 137 val sgnerror = (L'.SgnError, dummy)
adamc@403 138 val strerror = (L'.StrError, dummy)
adamc@403 139
adamc@403 140 val int = ref cerror
adamc@403 141 val float = ref cerror
adamc@403 142 val string = ref cerror
adamc@821 143 val char = ref cerror
adamc@403 144 val table = ref cerror
adamc@403 145
adamc@403 146 local
adamc@403 147 val count = ref 0
adamc@403 148 in
adamc@403 149
adamc@403 150 fun resetKunif () = count := 0
adamc@403 151
adamc@403 152 fun kunif loc =
adamc@403 153 let
adamc@403 154 val n = !count
adamc@403 155 val s = if n <= 26 then
adamc@403 156 str (chr (ord #"A" + n))
adamc@403 157 else
adamc@403 158 "U" ^ Int.toString (n - 26)
adamc@403 159 in
adamc@403 160 count := n + 1;
adamc@838 161 (L'.KUnif (loc, s, ref NONE), loc)
adamc@403 162 end
adamc@403 163
adamc@403 164 end
adamc@403 165
adamc@403 166 local
adamc@403 167 val count = ref 0
adamc@403 168 in
adamc@403 169
adamc@403 170 fun resetCunif () = count := 0
adamc@403 171
adamc@403 172 fun cunif (loc, k) =
adamc@403 173 let
adamc@403 174 val n = !count
adamc@712 175 val s = if n < 26 then
adamc@403 176 str (chr (ord #"A" + n))
adamc@403 177 else
adamc@403 178 "U" ^ Int.toString (n - 26)
adamc@403 179 in
adamc@403 180 count := n + 1;
adamc@838 181 (L'.CUnif (loc, k, s, ref NONE), loc)
adamc@403 182 end
adamc@403 183
adamc@403 184 end
adamc@403 185
adamc@623 186 fun elabKind env (k, loc) =
adamc@403 187 case k of
adamc@403 188 L.KType => (L'.KType, loc)
adamc@623 189 | L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403 190 | L.KName => (L'.KName, loc)
adamc@623 191 | L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403 192 | L.KUnit => (L'.KUnit, loc)
adamc@623 193 | L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adamc@403 194 | L.KWild => kunif loc
adamc@403 195
adamc@623 196 | L.KVar s => (case E.lookupK env s of
adamc@623 197 NONE =>
adamc@623 198 (kindError env (UnboundKind (loc, s));
adamc@623 199 kerror)
adamc@623 200 | SOME n => (L'.KRel n, loc))
adamc@623 201 | L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623 202
adamc@621 203 fun mapKind (dom, ran, loc)=
adamc@621 204 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621 205 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621 206 (L'.KRecord ran, loc)), loc)), loc)
adamc@403 207
adamc@403 208 fun hnormKind (kAll as (k, _)) =
adamc@403 209 case k of
adamc@403 210 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403 211 | _ => kAll
adamc@403 212
adamc@623 213 open ElabOps
adamc@623 214
adamc@623 215 fun elabConHead (c as (_, loc)) k =
adamc@623 216 let
adamc@623 217 fun unravel (k, c) =
adamc@623 218 case hnormKind k of
adamc@623 219 (L'.KFun (x, k'), _) =>
adamc@623 220 let
adamc@623 221 val u = kunif loc
adamc@623 222
adamc@623 223 val k'' = subKindInKind (0, u) k'
adamc@623 224 in
adamc@623 225 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623 226 end
adamc@623 227 | _ => (c, k)
adamc@623 228 in
adamc@623 229 unravel (k, c)
adamc@623 230 end
adamc@623 231
adamc@403 232 fun elabCon (env, denv) (c, loc) =
adamc@403 233 case c of
adamc@403 234 L.CAnnot (c, k) =>
adamc@403 235 let
adamc@623 236 val k' = elabKind env k
adamc@403 237 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 238 in
adamc@403 239 checkKind env c' ck k';
adamc@403 240 (c', k', gs)
adamc@403 241 end
adamc@403 242
adamc@403 243 | L.TFun (t1, t2) =>
adamc@403 244 let
adamc@403 245 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 246 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 247 in
adamc@403 248 checkKind env t1' k1 ktype;
adamc@403 249 checkKind env t2' k2 ktype;
adamc@403 250 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 251 end
adamc@403 252 | L.TCFun (e, x, k, t) =>
adamc@403 253 let
adamc@403 254 val e' = elabExplicitness e
adamc@623 255 val k' = elabKind env k
adamc@403 256 val env' = E.pushCRel env x k'
adamc@403 257 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 258 in
adamc@403 259 checkKind env t' tk ktype;
adamc@403 260 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 261 end
adamc@623 262 | L.TKFun (x, t) =>
adamc@623 263 let
adamc@623 264 val env' = E.pushKRel env x
adamc@623 265 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 266 in
adamc@623 267 checkKind env t' tk ktype;
adamc@623 268 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623 269 end
adamc@628 270 | L.TDisjoint (c1, c2, c) =>
adamc@403 271 let
adamc@403 272 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 273 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 274
adamc@403 275 val ku1 = kunif loc
adamc@403 276 val ku2 = kunif loc
adamc@403 277
adamc@628 278 val denv' = D.assert env denv (c1', c2')
adamc@403 279 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 280 in
adamc@403 281 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 282 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@403 283
adamc@628 284 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403 285 end
adamc@403 286 | L.TRecord c =>
adamc@403 287 let
adamc@403 288 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 289 val k = (L'.KRecord ktype, loc)
adamc@403 290 in
adamc@403 291 checkKind env c' ck k;
adamc@403 292 ((L'.TRecord c', loc), ktype, gs)
adamc@403 293 end
adamc@403 294
adamc@403 295 | L.CVar ([], s) =>
adamc@403 296 (case E.lookupC env s of
adamc@403 297 E.NotBound =>
adamc@403 298 (conError env (UnboundCon (loc, s));
adamc@403 299 (cerror, kerror, []))
adamc@403 300 | E.Rel (n, k) =>
adamc@623 301 let
adamc@623 302 val (c, k) = elabConHead (L'.CRel n, loc) k
adamc@623 303 in
adamc@623 304 (c, k, [])
adamc@623 305 end
adamc@403 306 | E.Named (n, k) =>
adamc@623 307 let
adamc@623 308 val (c, k) = elabConHead (L'.CNamed n, loc) k
adamc@623 309 in
adamc@623 310 (c, k, [])
adamc@623 311 end)
adamc@403 312 | L.CVar (m1 :: ms, s) =>
adamc@403 313 (case E.lookupStr env m1 of
adamc@403 314 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 315 (cerror, kerror, []))
adamc@403 316 | SOME (n, sgn) =>
adamc@403 317 let
adamc@403 318 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 319 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 320 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 321 (strerror, sgnerror))
adamc@403 322 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 323 ((L'.StrVar n, loc), sgn) ms
adamc@403 324
adamc@403 325 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403 326 NONE => (conError env (UnboundCon (loc, s));
adamc@403 327 kerror)
adamc@403 328 | SOME (k, _) => k
adamc@987 329 val (c, k) = elabConHead (L'.CModProj (n, ms, s), loc) k
adamc@403 330 in
adamc@987 331 (c, k, [])
adamc@403 332 end)
adamc@403 333
adamc@403 334 | L.CApp (c1, c2) =>
adamc@403 335 let
adamc@403 336 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 337 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 338 val dom = kunif loc
adamc@403 339 val ran = kunif loc
adamc@403 340 in
adamc@403 341 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 342 checkKind env c2' k2 dom;
adamc@403 343 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 344 end
adamc@403 345 | L.CAbs (x, ko, t) =>
adamc@403 346 let
adamc@403 347 val k' = case ko of
adamc@403 348 NONE => kunif loc
adamc@623 349 | SOME k => elabKind env k
adamc@403 350 val env' = E.pushCRel env x k'
adamc@403 351 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 352 in
adamc@403 353 ((L'.CAbs (x, k', t'), loc),
adamc@403 354 (L'.KArrow (k', tk), loc),
adamc@403 355 gs)
adamc@403 356 end
adamc@623 357 | L.CKAbs (x, t) =>
adamc@623 358 let
adamc@623 359 val env' = E.pushKRel env x
adamc@623 360 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 361 in
adamc@623 362 ((L'.CKAbs (x, t'), loc),
adamc@623 363 (L'.KFun (x, tk), loc),
adamc@623 364 gs)
adamc@623 365 end
adamc@403 366
adamc@403 367 | L.CName s =>
adamc@403 368 ((L'.CName s, loc), kname, [])
adamc@403 369
adamc@403 370 | L.CRecord xcs =>
adamc@403 371 let
adamc@403 372 val k = kunif loc
adamc@403 373
adamc@403 374 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 375 let
adamc@403 376 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 377 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 378 in
adamc@403 379 checkKind env x' xk kname;
adamc@403 380 checkKind env c' ck k;
adamc@403 381 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 382 end) [] xcs
adamc@403 383
adamc@403 384 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 385 (* Add duplicate field checking later. *)
adamc@403 386
adamc@403 387 fun prove (xcs, ds) =
adamc@403 388 case xcs of
adamc@403 389 [] => ds
adamc@403 390 | xc :: rest =>
adamc@403 391 let
adamc@403 392 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 393 val ds = foldl (fn (xc', ds) =>
adamc@403 394 let
adamc@403 395 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 396 in
adamc@403 397 D.prove env denv (r1, r2, loc) @ ds
adamc@403 398 end)
adamc@403 399 ds rest
adamc@403 400 in
adamc@403 401 prove (rest, ds)
adamc@403 402 end
adamc@403 403 in
adamc@403 404 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 405 end
adamc@403 406 | L.CConcat (c1, c2) =>
adamc@403 407 let
adamc@403 408 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 409 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 410 val ku = kunif loc
adamc@403 411 val k = (L'.KRecord ku, loc)
adamc@403 412 in
adamc@403 413 checkKind env c1' k1 k;
adamc@403 414 checkKind env c2' k2 k;
adamc@403 415 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 416 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 417 end
adamc@621 418 | L.CMap =>
adamc@403 419 let
adamc@403 420 val dom = kunif loc
adamc@403 421 val ran = kunif loc
adamc@403 422 in
adamc@621 423 ((L'.CMap (dom, ran), loc),
adamc@621 424 mapKind (dom, ran, loc),
adamc@403 425 [])
adamc@403 426 end
adamc@403 427
adamc@403 428 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 429
adamc@403 430 | L.CTuple cs =>
adamc@403 431 let
adamc@403 432 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 433 let
adamc@403 434 val (c', k, gs') = elabCon (env, denv) c
adamc@403 435 in
adamc@403 436 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 437 end) ([], [], []) cs
adamc@403 438 in
adamc@403 439 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 440 end
adamc@403 441 | L.CProj (c, n) =>
adamc@403 442 let
adamc@403 443 val (c', k, gs) = elabCon (env, denv) c
adamc@403 444 in
adamc@403 445 case hnormKind k of
adamc@403 446 (L'.KTuple ks, _) =>
adamc@403 447 if n <= 0 orelse n > length ks then
adamc@403 448 (conError env (ProjBounds (c', n));
adamc@83 449 (cerror, kerror, []))
adamc@403 450 else
adamc@403 451 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@403 452 | k => (conError env (ProjMismatch (c', k));
adamc@403 453 (cerror, kerror, []))
adamc@403 454 end
adamc@403 455
adamc@403 456 | L.CWild k =>
adamc@403 457 let
adamc@623 458 val k' = elabKind env k
adamc@403 459 in
adamc@403 460 (cunif (loc, k'), k', [])
adamc@403 461 end
adamc@403 462
adamc@403 463 fun kunifsRemain k =
adamc@403 464 case k of
adamc@403 465 L'.KUnif (_, _, ref NONE) => true
adamc@403 466 | _ => false
adamc@403 467 fun cunifsRemain c =
adamc@403 468 case c of
adamc@710 469 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@403 470 | _ => NONE
adamc@403 471
adamc@403 472 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 473 con = fn _ => false,
adamc@403 474 exp = fn _ => false,
adamc@403 475 sgn_item = fn _ => false,
adamc@403 476 sgn = fn _ => false,
adamc@403 477 str = fn _ => false,
adamc@403 478 decl = fn _ => false}
adamc@403 479
adamc@403 480 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@403 481 con = cunifsRemain,
adamc@403 482 exp = fn _ => NONE,
adamc@403 483 sgn_item = fn _ => NONE,
adamc@403 484 sgn = fn _ => NONE,
adamc@403 485 str = fn _ => NONE,
adamc@403 486 decl = fn _ => NONE}
adamc@403 487
adamc@403 488 fun occursCon r =
adamc@403 489 U.Con.exists {kind = fn _ => false,
adamc@403 490 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@403 491 | _ => false}
adamc@403 492
adamc@403 493 exception CUnify' of cunify_error
adamc@403 494
adamc@403 495 exception SynUnif = E.SynUnif
adamc@403 496
adamc@403 497 type record_summary = {
adamc@403 498 fields : (L'.con * L'.con) list,
adamc@403 499 unifs : (L'.con * L'.con option ref) list,
adamc@403 500 others : L'.con list
adamc@403 501 }
adamc@403 502
adamc@403 503 fun summaryToCon {fields, unifs, others} =
adamc@403 504 let
adamc@403 505 val c = (L'.CRecord (ktype, []), dummy)
adamc@403 506 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403 507 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403 508 in
adamc@403 509 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403 510 end
adamc@403 511
adamc@403 512 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 513
adamc@403 514 exception CUnify of L'.con * L'.con * cunify_error
adamc@403 515
adamc@403 516 fun kindof env (c, loc) =
adamc@403 517 case c of
adamc@403 518 L'.TFun _ => ktype
adamc@403 519 | L'.TCFun _ => ktype
adamc@403 520 | L'.TRecord _ => ktype
adamc@628 521 | L'.TDisjoint _ => ktype
adamc@403 522
adamc@403 523 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 524 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 525 | L'.CModProj (n, ms, x) =>
adamc@403 526 let
adamc@403 527 val (_, sgn) = E.lookupStrNamed env n
adamc@403 528 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 529 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 530 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 531 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 532 ((L'.StrVar n, loc), sgn) ms
adamc@403 533 in
adamc@403 534 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 535 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 536 | SOME (k, _) => k
adamc@403 537 end
adamc@403 538
adamc@403 539 | L'.CApp (c, _) =>
adamc@403 540 (case hnormKind (kindof env c) of
adamc@403 541 (L'.KArrow (_, k), _) => k
adamc@403 542 | (L'.KError, _) => kerror
adamc@413 543 | k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403 544 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628 545
adamc@403 546
adamc@403 547 | L'.CName _ => kname
adamc@403 548
adamc@403 549 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 550 | L'.CConcat (c, _) => kindof env c
adamc@621 551 | L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403 552
adamc@403 553 | L'.CUnit => (L'.KUnit, loc)
adamc@403 554
adamc@403 555 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 556 | L'.CProj (c, n) =>
adamc@403 557 (case hnormKind (kindof env c) of
adamc@403 558 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@413 559 | k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403 560
adamc@403 561 | L'.CError => kerror
adamc@403 562 | L'.CUnif (_, k, _, _) => k
adamc@403 563
adamc@623 564 | L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623 565 | L'.CKApp (c, k) =>
adamc@623 566 (case hnormKind (kindof env c) of
adamc@623 567 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623 568 | k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623 569 | L'.TKFun _ => ktype
adamc@403 570
adamc@621 571 exception GuessFailure
adamc@403 572
adamc@513 573 fun isUnitCon env (c, loc) =
adamc@513 574 case c of
adamc@513 575 L'.TFun _ => false
adamc@513 576 | L'.TCFun _ => false
adamc@513 577 | L'.TRecord _ => false
adamc@628 578 | L'.TDisjoint _ => false
adamc@513 579
adamc@513 580 | L'.CRel xn => #1 (#2 (E.lookupCRel env xn)) = L'.KUnit
adamc@513 581 | L'.CNamed xn => #1 (#2 (E.lookupCNamed env xn)) = L'.KUnit
adamc@518 582 | L'.CModProj (n, ms, x) => false
adamc@518 583 (*let
adamc@513 584 val (_, sgn) = E.lookupStrNamed env n
adamc@513 585 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513 586 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513 587 NONE => raise Fail "kindof: Unknown substructure"
adamc@513 588 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513 589 ((L'.StrVar n, loc), sgn) ms
adamc@513 590 in
adamc@513 591 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513 592 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513 593 | SOME ((k, _), _) => k = L'.KUnit
adamc@518 594 end*)
adamc@518 595
adamc@518 596 | L'.CApp (c, _) => false
adamc@518 597 (*(case hnormKind (kindof env c) of
adamc@513 598 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513 599 | (L'.KError, _) => false
adamc@518 600 | k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513 601 | L'.CAbs _ => false
adamc@513 602
adamc@513 603 | L'.CName _ => false
adamc@513 604
adamc@513 605 | L'.CRecord _ => false
adamc@513 606 | L'.CConcat _ => false
adamc@621 607 | L'.CMap _ => false
adamc@513 608
adamc@513 609 | L'.CUnit => true
adamc@513 610
adamc@513 611 | L'.CTuple _ => false
adamc@518 612 | L'.CProj (c, n) => false
adamc@518 613 (*(case hnormKind (kindof env c) of
adamc@513 614 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518 615 | k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513 616
adamc@513 617 | L'.CError => false
adamc@513 618 | L'.CUnif (_, k, _, _) => #1 k = L'.KUnit
adamc@513 619
adamc@623 620 | L'.CKAbs _ => false
adamc@623 621 | L'.CKApp _ => false
adamc@623 622 | L'.TKFun _ => false
adamc@623 623
adamc@709 624 val recdCounter = ref 0
adamc@709 625
adamc@713 626 val mayDelay = ref false
adamc@777 627 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777 628
adamc@830 629 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830 630
adamc@777 631 fun unifyRecordCons env (loc, c1, c2) =
adamc@403 632 let
adamc@403 633 fun rkindof c =
adamc@403 634 case hnormKind (kindof env c) of
adamc@403 635 (L'.KRecord k, _) => k
adamc@403 636 | (L'.KError, _) => kerror
adamc@753 637 | (L'.KUnif (_, _, r), _) =>
adamc@753 638 let
adamc@753 639 val k = kunif (#2 c)
adamc@753 640 in
adamc@753 641 r := SOME (L'.KRecord k, #2 c);
adamc@753 642 k
adamc@753 643 end
adamc@413 644 | k => raise CUnify' (CKindof (k, c, "record"))
adamc@403 645
adamc@403 646 val k1 = rkindof c1
adamc@403 647 val k2 = rkindof c2
adamc@403 648
adamc@628 649 val r1 = recordSummary env c1
adamc@628 650 val r2 = recordSummary env c2
adamc@403 651 in
adamc@623 652 unifyKinds env k1 k2;
adamc@777 653 unifySummaries env (loc, k1, r1, r2)
adamc@403 654 end
adamc@403 655
adamc@777 656 and normalizeRecordSummary env (r : record_summary) =
adamc@777 657 recordSummary env (summaryToCon r)
adamc@777 658
adamc@628 659 and recordSummary env c =
adamc@403 660 let
adamc@628 661 val c = hnormCon env c
adamc@628 662
adamc@628 663 val sum =
adamc@403 664 case c of
adamc@628 665 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403 666 | (L'.CConcat (c1, c2), _) =>
adamc@403 667 let
adamc@628 668 val s1 = recordSummary env c1
adamc@628 669 val s2 = recordSummary env c2
adamc@403 670 in
adamc@628 671 {fields = #fields s1 @ #fields s2,
adamc@628 672 unifs = #unifs s1 @ #unifs s2,
adamc@628 673 others = #others s1 @ #others s2}
adamc@403 674 end
adamc@628 675 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary env c
adamc@628 676 | c' as (L'.CUnif (_, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628 677 | c' => {fields = [], unifs = [], others = [c']}
adamc@403 678 in
adamc@628 679 sum
adamc@403 680 end
adamc@403 681
adamc@987 682 and consEq env loc (c1, c2) =
adamc@777 683 let
adamc@777 684 val mayDelay' = !mayDelay
adamc@777 685 in
adamc@777 686 (mayDelay := false;
adamc@987 687 unifyCons env loc c1 c2;
adamc@777 688 mayDelay := mayDelay';
adamc@777 689 true)
adamc@777 690 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777 691 end
adamc@403 692
adamc@403 693 and consNeq env (c1, c2) =
adamc@628 694 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403 695 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093 696 | (L'.CName _, L'.CRel _) => true
adamc@1093 697 | (L'.CRel _, L'.CName _) => true
adamc@1093 698 | (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093 699 | (L'.CRel _, L'.CNamed _) => true
adamc@1093 700 | (L'.CNamed _, L'.CRel _) => true
adamc@1093 701 | (L'.CRel _, L'.CModProj _) => true
adamc@1093 702 | (L'.CModProj _, L'.CRel _) => true
adamc@1269 703 | (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adamc@403 704 | _ => false
adamc@403 705
adamc@777 706 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403 707 let
adamc@848 708 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@848 709 ("#1", p_summary env s1),
adamc@848 710 ("#2", p_summary env s2)]*)
adamc@403 711
adamc@403 712 fun eatMatching p (ls1, ls2) =
adamc@403 713 let
adamc@403 714 fun em (ls1, ls2, passed1) =
adamc@403 715 case ls1 of
adamc@403 716 [] => (rev passed1, ls2)
adamc@403 717 | h1 :: t1 =>
adamc@403 718 let
adamc@403 719 fun search (ls2', passed2) =
adamc@403 720 case ls2' of
adamc@403 721 [] => em (t1, ls2, h1 :: passed1)
adamc@403 722 | h2 :: t2 =>
adamc@403 723 if p (h1, h2) then
adamc@403 724 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 725 else
adamc@403 726 search (t2, h2 :: passed2)
adamc@403 727 in
adamc@403 728 search (ls2, [])
adamc@403 729 end
adamc@403 730 in
adamc@403 731 em (ls1, ls2, [])
adamc@403 732 end
adamc@403 733
adamc@403 734 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 735 not (consNeq env (x1, x2))
adamc@987 736 andalso consEq env loc (c1, c2)
adamc@987 737 andalso consEq env loc (x1, x2))
adamc@403 738 (#fields s1, #fields s2)
adamc@403 739 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 740 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 741
adamc@403 742 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 743
adamc@987 744 val (others1, others2) = eatMatching (consEq env loc) (#others s1, #others s2)
adamc@403 745 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 746 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 747
adamc@709 748 fun unsummarize {fields, unifs, others} =
adamc@709 749 let
adamc@709 750 val c = (L'.CRecord (k, fields), loc)
adamc@709 751
adamc@709 752 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709 753 c unifs
adamc@709 754 in
adamc@709 755 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709 756 c others
adamc@709 757 end
adamc@709 758
adamc@710 759 val empties = ([], [], [], [], [], [])
adamc@710 760
adamc@709 761 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709 762 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@709 763 orig as ([(_, r)], [], [], _, _, _) =>
adamc@709 764 let
adamc@709 765 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709 766 in
adamc@709 767 if occursCon r c then
adamc@709 768 orig
adamc@709 769 else
adamc@709 770 (r := SOME c;
adamc@710 771 empties)
adamc@709 772 end
adamc@709 773 | orig as (_, _, _, [(_, r)], [], []) =>
adamc@709 774 let
adamc@709 775 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709 776 in
adamc@709 777 if occursCon r c then
adamc@709 778 orig
adamc@709 779 else
adamc@709 780 (r := SOME c;
adamc@710 781 empties)
adamc@709 782 end
adamc@710 783 | orig as ([(_, r1 as ref NONE)], _, [], [(_, r2 as ref NONE)], _, []) =>
adamc@710 784 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710 785 let
adamc@838 786 val kr = (L'.KRecord k, loc)
adamc@710 787 val u = cunif (loc, kr)
adamc@710 788 in
adamc@710 789 r1 := SOME (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc);
adamc@710 790 r2 := SOME (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc);
adamc@710 791 empties
adamc@710 792 end
adamc@710 793 else
adamc@710 794 orig
adamc@709 795 | orig => orig
adamc@709 796
adamc@403 797 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777 798 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 799
adamc@753 800 fun isGuessable (other, fs, unifs) =
adamc@753 801 let
adamc@753 802 val c = (L'.CRecord (k, fs), loc)
adamc@753 803 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753 804 in
adamc@987 805 (guessMap env loc (other, c, GuessFailure);
adamc@753 806 true)
adamc@753 807 handle GuessFailure => false
adamc@753 808 end
adamc@403 809
adamc@754 810 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753 811 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753 812 ([], _, [other1], [], [], _) =>
adamc@753 813 if isGuessable (other1, fs2, unifs2) then
adamc@754 814 ([], [], [], [], [], [])
adamc@403 815 else
adamc@754 816 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753 817 | (_, [], [], [other2], _, []) =>
adamc@777 818 if isGuessable (other2, fs1, unifs1) then
adamc@777 819 ([], [], [], [], [], [])
adamc@777 820 else
adamc@777 821 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754 822 | _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403 823
adamc@403 824 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 825 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 826
adamc@838 827 val empty = (L'.CRecord (k, []), loc)
adamc@1071 828 fun failure () =
adamc@1071 829 let
adamc@1071 830 val fs2 = #fields s2
adamc@1071 831
adamc@1071 832 fun findPointwise fs1 =
adamc@1071 833 case fs1 of
adamc@1071 834 [] => NONE
adamc@1071 835 | (nm1, c1) :: fs1 =>
adamc@1071 836 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071 837 NONE => findPointwise fs1
adamc@1071 838 | SOME (_, c2) =>
adamc@1071 839 if consEq env loc (c1, c2) then
adamc@1071 840 findPointwise fs1
adamc@1071 841 else
adamc@1071 842 SOME (nm1, c1, c2)
adamc@1071 843 in
adamc@1071 844 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071 845 end
adamc@709 846 in
adamc@777 847 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777 848 (_, [], [], [], [], []) =>
adamc@777 849 app (fn (_, r) => r := SOME empty) unifs1
adamc@777 850 | ([], [], [], _, [], []) =>
adamc@777 851 app (fn (_, r) => r := SOME empty) unifs2
adamc@777 852 | _ =>
adamc@777 853 if !mayDelay then
adamc@777 854 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adamc@777 855 else
adamc@777 856 failure ())
adamc@777 857
adamc@777 858 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777 859 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403 860 end
adamc@403 861
adamc@987 862 and guessMap env loc (c1, c2, ex) =
adamc@403 863 let
adamc@621 864 fun unfold (dom, ran, f, r, c) =
adamc@403 865 let
adamc@621 866 fun unfold (r, c) =
adamc@754 867 case #1 (hnormCon env c) of
adamc@987 868 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628 869 | L'.CRecord (_, [(x, v)]) =>
adamc@628 870 let
adamc@628 871 val v' = case dom of
adamc@628 872 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628 873 | _ => cunif (loc, dom)
adamc@628 874 in
adamc@987 875 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987 876 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 877 end
adamc@628 878 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 879 let
adamc@628 880 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 881 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 882 in
adamc@628 883 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 884 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987 885 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 886 end
adamc@628 887 | L'.CConcat (c1', c2') =>
adamc@628 888 let
adamc@628 889 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 890 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 891 in
adamc@628 892 unfold (r1, c1');
adamc@628 893 unfold (r2, c2');
adamc@987 894 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 895 end
adamc@754 896 | L'.CUnif (_, _, _, ur) =>
adamc@777 897 ur := SOME (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adamc@628 898 | _ => raise ex
adamc@403 899 in
adamc@621 900 unfold (r, c)
adamc@403 901 end
adamc@632 902 handle _ => raise ex
adamc@403 903 in
adamc@403 904 case (#1 c1, #1 c2) of
adamc@621 905 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 906 unfold (dom, ran, f, r, c2)
adamc@621 907 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 908 unfold (dom, ran, f, r, c1)
adamc@403 909 | _ => raise ex
adamc@403 910 end
adamc@403 911
adamc@987 912 and unifyCons' env loc c1 c2 =
adamc@628 913 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 914 ()
adamc@628 915 else
adamc@403 916 let
adamc@628 917 (*val befor = Time.now ()
adamc@628 918 val old1 = c1
adamc@628 919 val old2 = c2*)
adamc@628 920 val c1 = hnormCon env c1
adamc@628 921 val c2 = hnormCon env c2
adamc@403 922 in
adamc@987 923 unifyCons'' env loc c1 c2
adamc@987 924 handle ex => guessMap env loc (c1, c2, ex)
adamc@403 925 end
adamc@628 926
adamc@987 927 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403 928 let
adamc@403 929 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 930
adamc@706 931 fun projSpecial1 (c1, n1, onFail) =
adamc@403 932 let
adamc@632 933 fun trySnd () =
adamc@632 934 case #1 (hnormCon env c2All) of
adamc@632 935 L'.CProj (c2, n2) =>
adamc@632 936 let
adamc@632 937 fun tryNormal () =
adamc@632 938 if n1 = n2 then
adamc@987 939 unifyCons' env loc c1 c2
adamc@632 940 else
adamc@706 941 onFail ()
adamc@632 942 in
adamc@632 943 case #1 (hnormCon env c2) of
adamc@632 944 L'.CUnif (_, k, _, r) =>
adamc@632 945 (case #1 (hnormKind k) of
adamc@632 946 L'.KTuple ks =>
adamc@632 947 let
adamc@632 948 val loc = #2 c2
adamc@632 949 val us = map (fn k => cunif (loc, k)) ks
adamc@632 950 in
adamc@632 951 r := SOME (L'.CTuple us, loc);
adamc@987 952 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632 953 end
adamc@632 954 | _ => tryNormal ())
adamc@632 955 | _ => tryNormal ()
adamc@632 956 end
adamc@706 957 | _ => onFail ()
adamc@403 958 in
adamc@632 959 case #1 (hnormCon env c1) of
adamc@632 960 L'.CUnif (_, k, _, r) =>
adamc@632 961 (case #1 (hnormKind k) of
adamc@632 962 L'.KTuple ks =>
adamc@632 963 let
adamc@632 964 val loc = #2 c1
adamc@632 965 val us = map (fn k => cunif (loc, k)) ks
adamc@632 966 in
adamc@632 967 r := SOME (L'.CTuple us, loc);
adamc@987 968 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632 969 end
adamc@632 970 | _ => trySnd ())
adamc@632 971 | _ => trySnd ()
adamc@403 972 end
adamc@632 973
adamc@706 974 fun projSpecial2 (c2, n2, onFail) =
adamc@706 975 case #1 (hnormCon env c2) of
adamc@706 976 L'.CUnif (_, k, _, r) =>
adamc@706 977 (case #1 (hnormKind k) of
adamc@706 978 L'.KTuple ks =>
adamc@706 979 let
adamc@706 980 val loc = #2 c2
adamc@706 981 val us = map (fn k => cunif (loc, k)) ks
adamc@706 982 in
adamc@706 983 r := SOME (L'.CTuple us, loc);
adamc@987 984 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706 985 end
adamc@706 986 | _ => onFail ())
adamc@706 987 | _ => onFail ()
adamc@706 988
adamc@777 989 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706 990
adamc@706 991 fun isRecord () =
adamc@706 992 case (c1, c2) of
adamc@706 993 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706 994 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706 995 | _ => isRecord' ()
adamc@706 996 in
adamc@706 997 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@706 998 ("c2All", p_con env c2All)];*)
adamc@706 999
adamc@706 1000 case (c1, c2) of
adamc@706 1001 (L'.CError, _) => ()
adamc@706 1002 | (_, L'.CError) => ()
adamc@403 1003
adamc@705 1004 | (L'.CRecord _, _) => isRecord ()
adamc@705 1005 | (_, L'.CRecord _) => isRecord ()
adamc@705 1006 | (L'.CConcat _, _) => isRecord ()
adamc@705 1007 | (_, L'.CConcat _) => isRecord ()
adamc@705 1008
adamc@705 1009 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@705 1010 if r1 = r2 then
adamc@705 1011 ()
adamc@705 1012 else
adamc@705 1013 (unifyKinds env k1 k2;
adamc@705 1014 r1 := SOME c2All)
adamc@705 1015
adamc@705 1016 | (L'.CUnif (_, _, _, r), _) =>
adamc@705 1017 if occursCon r c2All then
adamc@705 1018 err COccursCheckFailed
adamc@705 1019 else
adamc@705 1020 r := SOME c2All
adamc@705 1021 | (_, L'.CUnif (_, _, _, r)) =>
adamc@705 1022 if occursCon r c1All then
adamc@705 1023 err COccursCheckFailed
adamc@705 1024 else
adamc@705 1025 r := SOME c1All
adamc@705 1026
adamc@705 1027 | (L'.CUnit, L'.CUnit) => ()
adamc@705 1028
adamc@705 1029 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987 1030 (unifyCons' env loc d1 d2;
adamc@987 1031 unifyCons' env loc r1 r2)
adamc@705 1032 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705 1033 if expl1 <> expl2 then
adamc@705 1034 err CExplicitness
adamc@705 1035 else
adamc@705 1036 (unifyKinds env d1 d2;
adamc@705 1037 let
adamc@705 1038 (*val befor = Time.now ()*)
adamc@705 1039 val env' = E.pushCRel env x1 d1
adamc@705 1040 in
adamc@705 1041 (*TextIO.print ("E.pushCRel: "
adamc@705 1042 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705 1043 ^ "\n");*)
adamc@987 1044 unifyCons' env' loc r1 r2
adamc@705 1045 end)
adamc@987 1046 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705 1047 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987 1048 (unifyCons' env loc c1 c2;
adamc@987 1049 unifyCons' env loc d1 d2;
adamc@987 1050 unifyCons' env loc e1 e2)
adamc@705 1051
adamc@705 1052 | (L'.CRel n1, L'.CRel n2) =>
adamc@705 1053 if n1 = n2 then
adamc@705 1054 ()
adamc@705 1055 else
adamc@705 1056 err CIncompatible
adamc@705 1057 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@705 1058 if n1 = n2 then
adamc@705 1059 ()
adamc@705 1060 else
adamc@705 1061 err CIncompatible
adamc@705 1062
adamc@705 1063 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987 1064 (unifyCons' env loc d1 d2;
adamc@987 1065 unifyCons' env loc r1 r2)
adamc@705 1066 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705 1067 (unifyKinds env k1 k2;
adamc@987 1068 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705 1069
adamc@705 1070 | (L'.CName n1, L'.CName n2) =>
adamc@705 1071 if n1 = n2 then
adamc@705 1072 ()
adamc@705 1073 else
adamc@705 1074 err CIncompatible
adamc@705 1075
adamc@705 1076 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705 1077 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705 1078 ()
adamc@705 1079 else
adamc@705 1080 err CIncompatible
adamc@705 1081
adamc@705 1082 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987 1083 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705 1084 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705 1085
adamc@706 1086 | (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706 1087 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706 1088
adamc@623 1089 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1090 (unifyKinds env dom1 dom2;
adamc@628 1091 unifyKinds env ran1 ran2)
adamc@623 1092
adamc@623 1093 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987 1094 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623 1095 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1096 (unifyKinds env k1 k2;
adamc@987 1097 unifyCons' env loc c1 c2)
adamc@623 1098 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987 1099 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628 1100
adamc@403 1101 | _ => err CIncompatible
adamc@403 1102 end
adamc@403 1103
adamc@987 1104 and unifyCons env loc c1 c2 =
adamc@987 1105 unifyCons' env loc c1 c2
adamc@403 1106 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 1107 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 1108
adamc@628 1109 fun checkCon env e c1 c2 =
adamc@987 1110 unifyCons env (#2 e) c1 c2
adamc@403 1111 handle CUnify (c1, c2, err) =>
adamc@628 1112 expError env (Unify (e, c1, c2, err))
adamc@628 1113
adamc@628 1114 fun checkPatCon env p c1 c2 =
adamc@987 1115 unifyCons env (#2 p) c1 c2
adamc@403 1116 handle CUnify (c1, c2, err) =>
adamc@628 1117 expError env (PatUnify (p, c1, c2, err))
adamc@71 1118
adamc@403 1119 fun primType env p =
adamc@403 1120 case p of
adamc@403 1121 P.Int _ => !int
adamc@403 1122 | P.Float _ => !float
adamc@403 1123 | P.String _ => !string
adamc@821 1124 | P.Char _ => !char
adamc@623 1125
adamc@403 1126 datatype constraint =
adamc@403 1127 Disjoint of D.goal
adamc@403 1128 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1129
adamc@403 1130 val enD = map Disjoint
adamc@403 1131
adamc@634 1132 fun isClassOrFolder env cl =
adamc@634 1133 E.isClass env cl
adamc@634 1134 orelse case hnormCon env cl of
adamc@634 1135 (L'.CKApp (cl, _), _) =>
adamc@634 1136 (case hnormCon env cl of
adamc@634 1137 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1138 | _ => false)
adamc@634 1139 | _ => false
adamc@634 1140
adamc@629 1141 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1142 let
adamc@898 1143 fun unravelKind (t, e) =
adamc@898 1144 case hnormCon env t of
adamc@898 1145 (L'.TKFun (x, t'), _) =>
adamc@898 1146 let
adamc@898 1147 val u = kunif loc
adamc@898 1148
adamc@898 1149 val t'' = subKindInCon (0, u) t'
adamc@898 1150 in
adamc@898 1151 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898 1152 end
adamc@898 1153 | t => (e, t, [])
adamc@898 1154
adamc@403 1155 fun unravel (t, e) =
adamc@628 1156 case hnormCon env t of
adamc@628 1157 (L'.TKFun (x, t'), _) =>
adamc@628 1158 let
adamc@628 1159 val u = kunif loc
adamc@628 1160
adamc@628 1161 val t'' = subKindInCon (0, u) t'
adamc@628 1162 in
adamc@628 1163 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1164 end
adamc@628 1165 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1166 let
adamc@628 1167 val u = cunif (loc, k)
adamc@628 1168
adamc@628 1169 val t'' = subConInCon (0, u) t'
adamc@628 1170 in
adamc@628 1171 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1172 end
adamc@633 1173 | (L'.TFun (dom, ran), _) =>
adamc@628 1174 let
adamc@633 1175 fun default () = (e, t, [])
adamc@750 1176
adamc@750 1177 fun isInstance () =
adamc@750 1178 if infer <> L.TypesOnly then
adamc@750 1179 let
adamc@750 1180 val r = ref NONE
adamc@750 1181 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750 1182 in
adamc@750 1183 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750 1184 end
adamc@750 1185 else
adamc@750 1186 default ()
adamc@750 1187
adamc@750 1188 fun hasInstance c =
adamc@753 1189 case hnormCon env c of
adamc@753 1190 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753 1191 con = fn c =>
adamc@753 1192 E.isClass env (hnormCon env (c, loc))} c
adamc@753 1193 | c =>
adamc@750 1194 let
adamc@753 1195 fun findHead c =
adamc@753 1196 case #1 c of
adamc@753 1197 L'.CApp (f, _) => findHead f
adamc@753 1198 | _ => c
adamc@753 1199
adamc@753 1200 val cl = hnormCon env (findHead c)
adamc@750 1201 in
adamc@750 1202 isClassOrFolder env cl
adamc@750 1203 end
adamc@628 1204 in
adamc@750 1205 if hasInstance dom then
adamc@750 1206 isInstance ()
adamc@750 1207 else
adamc@750 1208 default ()
adamc@628 1209 end
adamc@629 1210 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1211 if infer <> L.TypesOnly then
adamc@629 1212 let
adamc@792 1213 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629 1214 val (e, t, gs') = unravel (t', e)
adamc@629 1215 in
adamc@629 1216 (e, t, enD gs @ gs')
adamc@629 1217 end
adamc@629 1218 else
adamc@629 1219 (e, t, [])
adamc@628 1220 | t => (e, t, [])
adamc@704 1221 in
adamc@704 1222 case infer of
adamc@898 1223 L.DontInfer => unravelKind (t, e)
adamc@704 1224 | _ => unravel (t, e)
adamc@704 1225 end
adamc@15 1226
adamc@628 1227 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1228 let
adamc@171 1229 val perror = (L'.PWild, loc)
adamc@171 1230 val terror = (L'.CError, loc)
adamc@171 1231 val pterror = (perror, terror)
adamc@171 1232 val rerror = (pterror, (env, bound))
adamc@171 1233
adamc@191 1234 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1235 case (po, to) of
adamc@188 1236 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1237 rerror)
adamc@188 1238 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1239 rerror)
adamc@191 1240 | (NONE, NONE) =>
adamc@191 1241 let
adamc@191 1242 val k = (L'.KType, loc)
adamc@191 1243 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1244 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1245 in
adamc@191 1246 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1247 (env, bound))
adamc@191 1248 end
adamc@188 1249 | (SOME p, SOME t) =>
adamc@188 1250 let
adamc@628 1251 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1252
adamc@191 1253 val k = (L'.KType, loc)
adamc@191 1254 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1255 val nxs = length unifs - 1
adamc@194 1256 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1257 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1258 in
adamc@628 1259 ignore (checkPatCon env p' pt t);
adamc@191 1260 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1261 (env, bound))
adamc@188 1262 end
adamc@171 1263 in
adamc@171 1264 case p of
adamc@171 1265 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1266 (env, bound))
adamc@171 1267 | L.PVar x =>
adamc@171 1268 let
adamc@171 1269 val t = if SS.member (bound, x) then
adamc@171 1270 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1271 terror)
adamc@171 1272 else
adamc@171 1273 cunif (loc, (L'.KType, loc))
adamc@171 1274 in
adamc@182 1275 (((L'.PVar (x, t), loc), t),
adamc@171 1276 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1277 end
adamc@173 1278 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1279 (env, bound))
adamc@171 1280 | L.PCon ([], x, po) =>
adamc@171 1281 (case E.lookupConstructor env x of
adamc@174 1282 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1283 rerror)
adamc@191 1284 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1285 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1286 (case E.lookupStr env m1 of
adamc@174 1287 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1288 rerror)
adamc@174 1289 | SOME (n, sgn) =>
adamc@174 1290 let
adamc@174 1291 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1292 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1293 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1294 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1295 ((L'.StrVar n, loc), sgn) ms
adamc@174 1296 in
adamc@174 1297 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1298 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1299 rerror)
adamc@191 1300 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1301 end)
adamc@174 1302
adamc@175 1303 | L.PRecord (xps, flex) =>
adamc@175 1304 let
adamc@175 1305 val (xpts, (env, bound, _)) =
adamc@175 1306 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1307 let
adamc@628 1308 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1309 in
adamc@175 1310 if SS.member (fbound, x) then
adamc@175 1311 expError env (DuplicatePatField (loc, x))
adamc@175 1312 else
adamc@175 1313 ();
adamc@175 1314 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1315 end)
adamc@175 1316 (env, bound, SS.empty) xps
adamc@175 1317
adamc@175 1318 val k = (L'.KType, loc)
adamc@175 1319 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1320 val c =
adamc@175 1321 if flex then
adamc@176 1322 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1323 else
adamc@176 1324 c
adamc@175 1325 in
adamc@182 1326 (((L'.PRecord xpts, loc),
adamc@175 1327 (L'.TRecord c, loc)),
adamc@175 1328 (env, bound))
adamc@175 1329 end
adamc@822 1330
adamc@822 1331 | L.PAnnot (p, t) =>
adamc@822 1332 let
adamc@822 1333 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822 1334 val (t', k, _) = elabCon (env, D.empty) t
adamc@822 1335 in
adamc@822 1336 checkPatCon env p' pt t';
adamc@822 1337 ((p', t'), (env, bound))
adamc@822 1338 end
adamc@171 1339 end
adamc@171 1340
adamc@819 1341 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819 1342 fun exhaustive (env, t, ps, loc) =
adamc@819 1343 let
adamc@819 1344 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819 1345
adamc@819 1346 fun patConNum pc =
adamc@819 1347 case pc of
adamc@819 1348 L'.PConVar n => n
adamc@819 1349 | L'.PConProj (m1, ms, x) =>
adamc@819 1350 let
adamc@819 1351 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1352 in
adamc@819 1353 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819 1354 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1355 | SOME (_, n, _, _, _) => n
adamc@819 1356 end
adamc@819 1357
adamc@819 1358 fun nameOfNum (t, n) =
adamc@819 1359 case t of
adamc@819 1360 L'.CModProj (m1, ms, x) =>
adamc@819 1361 let
adamc@819 1362 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1363 in
adamc@819 1364 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1365 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1366 | SOME (_, cons) =>
adamc@819 1367 case ListUtil.search (fn (name, n', _) =>
adamc@819 1368 if n' = n then
adamc@819 1369 SOME name
adamc@819 1370 else
adamc@819 1371 NONE) cons of
adamc@819 1372 NONE => fail 9
adamc@819 1373 | SOME name => L'.PConProj (m1, ms, name)
adamc@819 1374 end
adamc@819 1375 | _ => L'.PConVar n
adamc@819 1376
adamc@819 1377 fun S (args, c, P) =
adamc@819 1378 List.mapPartial
adamc@819 1379 (fn [] => fail 1
adamc@819 1380 | p1 :: ps =>
adamc@819 1381 let
adamc@819 1382 val loc = #2 p1
adamc@819 1383
adamc@819 1384 fun wild () =
adamc@819 1385 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819 1386 in
adamc@819 1387 case #1 p1 of
adamc@819 1388 L'.PPrim _ => NONE
adamc@819 1389 | L'.PCon (_, c', _, NONE) =>
adamc@819 1390 if patConNum c' = c then
adamc@819 1391 SOME ps
adamc@819 1392 else
adamc@819 1393 NONE
adamc@819 1394 | L'.PCon (_, c', _, SOME p) =>
adamc@819 1395 if patConNum c' = c then
adamc@819 1396 SOME (p :: ps)
adamc@819 1397 else
adamc@819 1398 NONE
adamc@819 1399 | L'.PRecord xpts =>
adamc@819 1400 SOME (map (fn x =>
adamc@819 1401 case ListUtil.search (fn (x', p, _) =>
adamc@819 1402 if x = x' then
adamc@819 1403 SOME p
adamc@819 1404 else
adamc@819 1405 NONE) xpts of
adamc@819 1406 NONE => (L'.PWild, loc)
adamc@819 1407 | SOME p => p) args @ ps)
adamc@819 1408 | L'.PWild => wild ()
adamc@819 1409 | L'.PVar _ => wild ()
adamc@819 1410 end)
adamc@819 1411 P
adamc@819 1412
adamc@819 1413 fun D P =
adamc@819 1414 List.mapPartial
adamc@819 1415 (fn [] => fail 2
adamc@819 1416 | (p1, _) :: ps =>
adamc@819 1417 case p1 of
adamc@819 1418 L'.PWild => SOME ps
adamc@819 1419 | L'.PVar _ => SOME ps
adamc@819 1420 | L'.PPrim _ => NONE
adamc@819 1421 | L'.PCon _ => NONE
adamc@819 1422 | L'.PRecord _ => NONE)
adamc@819 1423 P
adamc@819 1424
adamc@819 1425 fun I (P, q) =
adamc@819 1426 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819 1427 ("q", p_list (p_con env) q)];*)
adamc@819 1428 case q of
adamc@819 1429 [] => (case P of
adamc@819 1430 [] => SOME []
adamc@819 1431 | _ => NONE)
adamc@819 1432 | q1 :: qs =>
adamc@819 1433 let
adamc@819 1434 val loc = #2 q1
adamc@819 1435
adamc@819 1436 fun unapp (t, acc) =
adamc@830 1437 case #1 t of
adamc@830 1438 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819 1439 | _ => (t, rev acc)
adamc@819 1440
adamc@830 1441 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830 1442 val t1 = hnormCon env t1
adamc@819 1443 fun doSub t = foldl (fn (arg, t) => subConInCon (0, arg) t) t args
adamc@819 1444
adamc@819 1445 fun dtype (dtO, names) =
adamc@819 1446 let
adamc@819 1447 val nameSet = IS.addList (IS.empty, names)
adamc@819 1448 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819 1449 case ps of
adamc@819 1450 [] => fail 4
adamc@819 1451 | (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819 1452 (IS.delete (nameSet, patConNum pc)
adamc@819 1453 handle NotFound => nameSet)
adamc@819 1454 | _ => nameSet)
adamc@819 1455 nameSet P
adamc@819 1456 in
adamc@819 1457 nameSet
adamc@819 1458 end
adamc@819 1459
adamc@819 1460 fun default () = (NONE, IS.singleton 0, [])
adamc@819 1461
adamc@819 1462 val (dtO, unused, cons) =
adamc@830 1463 case #1 t1 of
adamc@819 1464 L'.CNamed n =>
adamc@819 1465 let
adamc@819 1466 val dt = E.lookupDatatype env n
adamc@819 1467 val cons = E.constructors dt
adamc@819 1468 in
adamc@819 1469 (SOME dt,
adamc@819 1470 dtype (SOME dt, map #2 cons),
adamc@819 1471 map (fn (_, n, co) =>
adamc@819 1472 (n,
adamc@819 1473 case co of
adamc@819 1474 NONE => []
adamc@819 1475 | SOME t => [("", doSub t)])) cons)
adamc@819 1476 end
adamc@819 1477 | L'.CModProj (m1, ms, x) =>
adamc@819 1478 let
adamc@819 1479 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1480 in
adamc@819 1481 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1482 NONE => default ()
adamc@819 1483 | SOME (_, cons) =>
adamc@819 1484 (NONE,
adamc@819 1485 dtype (NONE, map #2 cons),
adamc@819 1486 map (fn (s, _, co) =>
adamc@819 1487 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819 1488 case co of
adamc@819 1489 NONE => []
adamc@819 1490 | SOME t => [("", doSub t)])) cons)
adamc@819 1491 end
adamc@830 1492 | L'.TRecord t =>
adamc@830 1493 (case #1 (hnormCon env t) of
adamc@830 1494 L'.CRecord (_, xts) =>
adamc@830 1495 let
adamc@830 1496 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830 1497 | _ => NONE) xts
adamc@830 1498 in
adamc@830 1499 if List.all Option.isSome xts then
adamc@830 1500 let
adamc@830 1501 val xts = List.mapPartial (fn x => x) xts
adamc@830 1502 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830 1503 String.compare (x1, x2) = GREATER) xts
adamc@830 1504 in
adamc@830 1505 (NONE, IS.empty, [(0, xts)])
adamc@830 1506 end
adamc@830 1507 else
adamc@830 1508 default ()
adamc@830 1509 end
adamc@830 1510 | _ => default ())
adamc@819 1511 | _ => default ()
adamc@819 1512 in
adamc@819 1513 if IS.isEmpty unused then
adamc@819 1514 let
adamc@819 1515 fun recurse cons =
adamc@819 1516 case cons of
adamc@819 1517 [] => NONE
adamc@819 1518 | (name, args) :: cons =>
adamc@819 1519 case I (S (map #1 args, name, P),
adamc@819 1520 map #2 args @ qs) of
adamc@819 1521 NONE => recurse cons
adamc@819 1522 | SOME ps =>
adamc@819 1523 let
adamc@819 1524 val nargs = length args
adamc@819 1525 val argPs = List.take (ps, nargs)
adamc@819 1526 val restPs = List.drop (ps, nargs)
adamc@819 1527
adamc@819 1528 val p = case name of
adamc@819 1529 0 => L'.PRecord (ListPair.map
adamc@819 1530 (fn ((name, t), p) => (name, p, t))
adamc@819 1531 (args, argPs))
adamc@830 1532 | _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819 1533 case argPs of
adamc@819 1534 [] => NONE
adamc@819 1535 | [p] => SOME p
adamc@819 1536 | _ => fail 3)
adamc@819 1537 in
adamc@819 1538 SOME ((p, loc) :: restPs)
adamc@819 1539 end
adamc@819 1540 in
adamc@819 1541 recurse cons
adamc@819 1542 end
adamc@819 1543 else
adamc@819 1544 case I (D P, qs) of
adamc@819 1545 NONE => NONE
adamc@819 1546 | SOME ps =>
adamc@819 1547 let
adamc@819 1548 val p = case cons of
adamc@819 1549 [] => L'.PWild
adamc@819 1550 | (0, _) :: _ => L'.PWild
adamc@819 1551 | _ =>
adamc@819 1552 case IS.find (fn _ => true) unused of
adamc@819 1553 NONE => fail 6
adamc@819 1554 | SOME name =>
adamc@819 1555 case ListUtil.search (fn (name', args) =>
adamc@819 1556 if name = name' then
adamc@819 1557 SOME (name', args)
adamc@819 1558 else
adamc@819 1559 NONE) cons of
adamc@819 1560 SOME (n, []) =>
adamc@830 1561 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819 1562 | SOME (n, [_]) =>
adamc@830 1563 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819 1564 | _ => fail 7
adamc@819 1565 in
adamc@819 1566 SOME ((p, loc) :: ps)
adamc@819 1567 end
adamc@819 1568 end
adamc@819 1569 in
adamc@819 1570 case I (map (fn x => [x]) ps, [t]) of
adamc@819 1571 NONE => NONE
adamc@819 1572 | SOME [p] => SOME p
adamc@819 1573 | _ => fail 7
adamc@819 1574 end
adamc@819 1575
adamc@217 1576 fun unmodCon env (c, loc) =
adamc@217 1577 case c of
adamc@217 1578 L'.CNamed n =>
adamc@217 1579 (case E.lookupCNamed env n of
adamc@217 1580 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1581 | _ => (c, loc))
adamc@217 1582 | L'.CModProj (m1, ms, x) =>
adamc@217 1583 let
adamc@217 1584 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1585 in
adamc@217 1586 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1587 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1588 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1589 | _ => (c, loc)
adamc@217 1590 end
adamc@217 1591 | _ => (c, loc)
adamc@217 1592
adamc@721 1593 fun normClassKey env c =
adamc@467 1594 let
adamc@721 1595 val c = hnormCon env c
adamc@467 1596 in
adamc@467 1597 case #1 c of
adamc@467 1598 L'.CApp (c1, c2) =>
adamc@467 1599 let
adamc@721 1600 val c1 = normClassKey env c1
adamc@721 1601 val c2 = normClassKey env c2
adamc@467 1602 in
adamc@467 1603 (L'.CApp (c1, c2), #2 c)
adamc@467 1604 end
adamc@721 1605 | L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721 1606 normClassKey env c)) xcs), #2 c)
adamc@721 1607 | _ => unmodCon env c
adamc@467 1608 end
adamc@467 1609
adamc@467 1610 fun normClassConstraint env (c, loc) =
adamc@217 1611 case c of
adamc@217 1612 L'.CApp (f, x) =>
adamc@217 1613 let
adamc@721 1614 val f = normClassKey env f
adamc@467 1615 val x = normClassKey env x
adamc@217 1616 in
adamc@467 1617 (L'.CApp (f, x), loc)
adamc@217 1618 end
adamc@674 1619 | L'.TFun (c1, c2) =>
adamc@674 1620 let
adamc@674 1621 val c1 = normClassConstraint env c1
adamc@674 1622 val c2 = normClassConstraint env c2
adamc@674 1623 in
adamc@674 1624 (L'.TFun (c1, c2), loc)
adamc@674 1625 end
adamc@674 1626 | L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adamc@467 1627 | L'.CUnif (_, _, _, ref (SOME c)) => normClassConstraint env c
adamc@721 1628 | _ => unmodCon env (c, loc)
adamc@216 1629
adamc@1093 1630 fun findHead e e' =
adamc@1093 1631 let
adamc@1093 1632 fun findHead (e, _) =
adamc@1093 1633 case e of
adamc@1093 1634 L.EVar (_, _, infer) =>
adamc@1093 1635 let
adamc@1093 1636 fun findHead' (e, _) =
adamc@1093 1637 case e of
adamc@1093 1638 L'.ENamed _ => true
adamc@1093 1639 | L'.EModProj _ => true
adamc@1093 1640 | L'.EApp (e, _) => findHead' e
adamc@1093 1641 | L'.ECApp (e, _) => findHead' e
adamc@1093 1642 | L'.EKApp (e, _) => findHead' e
adamc@1093 1643 | _ => false
adamc@1093 1644 in
adamc@1093 1645 if findHead' e' then
adamc@1093 1646 SOME infer
adamc@1093 1647 else
adamc@1093 1648 NONE
adamc@1093 1649 end
adamc@1093 1650 | L.EApp (e, _) => findHead e
adamc@1093 1651 | L.ECApp (e, _) => findHead e
adamc@1093 1652 | L.EDisjointApp e => findHead e
adamc@1093 1653 | _ => NONE
adamc@1093 1654 in
adamc@1093 1655 findHead e
adamc@1093 1656 end
adamc@1093 1657
adamc@1275 1658 datatype needed = Needed of {Cons : (L'.kind * L'.con option) SM.map,
adamc@1264 1659 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264 1660 Vals : SS.set,
adamc@1270 1661 Mods : (E.env * needed) SM.map}
adamc@1264 1662
adamc@1264 1663 fun ncons (Needed r) = #Cons r
adamc@1264 1664 fun nconstraints (Needed r) = #Constraints r
adamc@1264 1665 fun nvals (Needed r) = #Vals r
adamc@1264 1666 fun nmods (Needed r) = #Mods r
adamc@1264 1667
adamc@1264 1668 val nempty = Needed {Cons = SM.empty,
adamc@1264 1669 Constraints = nil,
adamc@1264 1670 Vals = SS.empty,
adamc@1264 1671 Mods = SM.empty}
adamc@1264 1672
adamc@1264 1673 fun naddCon (r : needed, k, v) =
adamc@1264 1674 let
adamc@1264 1675 val Needed r = r
adamc@1264 1676 in
adamc@1264 1677 Needed {Cons = SM.insert (#Cons r, k, v),
adamc@1264 1678 Constraints = #Constraints r,
adamc@1264 1679 Vals = #Vals r,
adamc@1264 1680 Mods = #Mods r}
adamc@1264 1681 end
adamc@1264 1682
adamc@1264 1683 fun naddConstraint (r : needed, v) =
adamc@1264 1684 let
adamc@1264 1685 val Needed r = r
adamc@1264 1686 in
adamc@1264 1687 Needed {Cons = #Cons r,
adamc@1264 1688 Constraints = v :: #Constraints r,
adamc@1264 1689 Vals = #Vals r,
adamc@1264 1690 Mods = #Mods r}
adamc@1264 1691 end
adamc@1264 1692
adamc@1264 1693 fun naddVal (r : needed, k) =
adamc@1264 1694 let
adamc@1264 1695 val Needed r = r
adamc@1264 1696 in
adamc@1264 1697 Needed {Cons = #Cons r,
adamc@1264 1698 Constraints = #Constraints r,
adamc@1264 1699 Vals = SS.add (#Vals r, k),
adamc@1264 1700 Mods = #Mods r}
adamc@1264 1701 end
adamc@1264 1702
adamc@1264 1703 fun naddMod (r : needed, k, v) =
adamc@1264 1704 let
adamc@1264 1705 val Needed r = r
adamc@1264 1706 in
adamc@1264 1707 Needed {Cons = #Cons r,
adamc@1264 1708 Constraints = #Constraints r,
adamc@1264 1709 Vals = #Vals r,
adamc@1264 1710 Mods = SM.insert (#Mods r, k, v)}
adamc@1264 1711 end
adamc@1264 1712
adamc@1264 1713 fun ndelCon (r : needed, k) =
adamc@1264 1714 let
adamc@1264 1715 val Needed r = r
adamc@1264 1716 in
adamc@1264 1717 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adamc@1264 1718 Constraints = #Constraints r,
adamc@1264 1719 Vals = #Vals r,
adamc@1264 1720 Mods = #Mods r}
adamc@1264 1721 end
adamc@1264 1722
adamc@1264 1723 fun ndelVal (r : needed, k) =
adamc@1264 1724 let
adamc@1264 1725 val Needed r = r
adamc@1264 1726 in
adamc@1264 1727 Needed {Cons = #Cons r,
adamc@1264 1728 Constraints = #Constraints r,
adamc@1264 1729 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264 1730 Mods = #Mods r}
adamc@1264 1731 end
adamc@1264 1732
adamc@92 1733 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1734 let
adamc@848 1735 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 1736 (*val befor = Time.now ()*)
adamc@280 1737
adamc@280 1738 val r = case e of
adamc@91 1739 L.EAnnot (e, t) =>
adamc@91 1740 let
adamc@91 1741 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1742 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1743 in
adamc@628 1744 checkCon env e' et t';
adamc@628 1745 (e', t', gs1 @ enD gs2)
adamc@91 1746 end
adamc@34 1747
adamc@91 1748 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1749 | L.EVar ([], s, infer) =>
adamc@91 1750 (case E.lookupE env s of
adamc@91 1751 E.NotBound =>
adamc@91 1752 (expError env (UnboundExp (loc, s));
adamc@91 1753 (eerror, cerror, []))
adamc@629 1754 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 1755 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1756 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1757 (case E.lookupStr env m1 of
adamc@91 1758 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1759 (eerror, cerror, []))
adamc@91 1760 | SOME (n, sgn) =>
adamc@91 1761 let
adamc@91 1762 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1763 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1764 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1765 (strerror, sgnerror))
adamc@91 1766 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1767 ((L'.StrVar n, loc), sgn) ms
adamc@10 1768
adamc@91 1769 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1770 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1771 cerror)
adamc@91 1772 | SOME t => t
adamc@91 1773 in
adamc@629 1774 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1775 end)
adamc@86 1776
adamc@349 1777 | L.EWild =>
adamc@210 1778 let
adamc@349 1779 val r = ref NONE
adamc@349 1780 val c = cunif (loc, (L'.KType, loc))
adamc@210 1781 in
adamc@349 1782 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1783 end
adamc@210 1784
adamc@91 1785 | L.EApp (e1, e2) =>
adamc@91 1786 let
adamc@91 1787 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093 1788
adamc@403 1789 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1790
adamc@91 1791 val dom = cunif (loc, ktype)
adamc@91 1792 val ran = cunif (loc, ktype)
adamc@838 1793 val t = (L'.TFun (dom, ran), loc)
adamc@1093 1794
adamc@1093 1795 val () = checkCon env e1' t1 t
adamc@1093 1796 val () = checkCon env e2' t2 dom
adamc@1093 1797
adamc@1093 1798 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093 1799 val (ef, et, gs3) =
adamc@1093 1800 case findHead e1 e1' of
adamc@1093 1801 NONE => (ef, ran, [])
adamc@1093 1802 | SOME infer => elabHead (env, denv) infer ef ran
adamc@91 1803 in
adamc@1093 1804 (ef, et, gs1 @ gs2 @ gs3)
adamc@91 1805 end
adamc@91 1806 | L.EAbs (x, to, e) =>
adamc@91 1807 let
adamc@91 1808 val (t', gs1) = case to of
adamc@91 1809 NONE => (cunif (loc, ktype), [])
adamc@91 1810 | SOME t =>
adamc@91 1811 let
adamc@91 1812 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1813 in
adamc@91 1814 checkKind env t' tk ktype;
adamc@91 1815 (t', gs)
adamc@91 1816 end
adamc@467 1817 val dom = normClassConstraint env t'
adamc@467 1818 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1819 in
adamc@91 1820 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1821 (L'.TFun (t', et), loc),
adamc@467 1822 enD gs1 @ gs2)
adamc@91 1823 end
adamc@91 1824 | L.ECApp (e, c) =>
adamc@91 1825 let
adamc@91 1826 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093 1827
adamc@328 1828 val oldEt = et
adamc@403 1829 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 1830 val (et', _) = hnormCon env et
adamc@91 1831 in
adamc@91 1832 case et' of
adamc@91 1833 L'.CError => (eerror, cerror, [])
adamc@328 1834 | L'.TCFun (_, x, k, eb) =>
adamc@91 1835 let
adamc@91 1836 val () = checkKind env c' ck k
adamc@91 1837 val eb' = subConInCon (0, c') eb
adamc@339 1838 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1839 cerror)
adamc@1093 1840
adamc@1093 1841 val ef = (L'.ECApp (e', c'), loc)
adamc@1093 1842 val (ef, eb', gs3) =
adamc@1093 1843 case findHead e e' of
adamc@1093 1844 NONE => (ef, eb', [])
adamc@1093 1845 | SOME infer => elabHead (env, denv) infer ef eb'
adamc@91 1846 in
adamc@328 1847 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1848 ("et", p_con env oldEt),
adamc@328 1849 ("x", PD.string x),
adamc@328 1850 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1851 ("c", p_con env c'),
adamc@328 1852 ("eb'", p_con env eb')];*)
adamc@1093 1853 (ef, eb', gs1 @ enD gs2 @ gs3)
adamc@91 1854 end
adamc@91 1855
adamc@91 1856 | _ =>
adamc@91 1857 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1858 (eerror, cerror, []))
adamc@91 1859 end
adamc@91 1860 | L.ECAbs (expl, x, k, e) =>
adamc@91 1861 let
adamc@91 1862 val expl' = elabExplicitness expl
adamc@623 1863 val k' = elabKind env k
adamc@328 1864
adamc@328 1865 val env' = E.pushCRel env x k'
adamc@328 1866 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1867 in
adamc@91 1868 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1869 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1870 gs)
adamc@91 1871 end
adamc@623 1872 | L.EKAbs (x, e) =>
adamc@623 1873 let
adamc@623 1874 val env' = E.pushKRel env x
adamc@623 1875 val (e', et, gs) = elabExp (env', denv) e
adamc@623 1876 in
adamc@623 1877 ((L'.EKAbs (x, e'), loc),
adamc@623 1878 (L'.TKFun (x, et), loc),
adamc@623 1879 gs)
adamc@623 1880 end
adamc@91 1881
adamc@91 1882 | L.EDisjoint (c1, c2, e) =>
adamc@91 1883 let
adamc@91 1884 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1885 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1886
adamc@91 1887 val ku1 = kunif loc
adamc@91 1888 val ku2 = kunif loc
adamc@91 1889
adamc@628 1890 val denv' = D.assert env denv (c1', c2')
adamc@628 1891 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 1892 in
adamc@91 1893 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1894 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1895
adamc@628 1896 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 1897 end
adamc@629 1898 | L.EDisjointApp e =>
adamc@629 1899 let
adamc@629 1900 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 1901
adamc@629 1902 val k1 = kunif loc
adamc@629 1903 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629 1904 val k2 = kunif loc
adamc@629 1905 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629 1906 val t' = cunif (loc, ktype)
adamc@629 1907 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 1908 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 1909 in
adamc@629 1910 (e', t', enD gs2 @ gs1)
adamc@629 1911 end
adamc@91 1912
adamc@91 1913 | L.ERecord xes =>
adamc@91 1914 let
adamc@91 1915 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1916 let
adamc@91 1917 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1918 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1919 in
adamc@91 1920 checkKind env x' xk kname;
adamc@228 1921 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1922 end)
adamc@91 1923 [] xes
adamc@91 1924
adamc@91 1925 val k = (L'.KType, loc)
adamc@91 1926
adamc@91 1927 fun prove (xets, gs) =
adamc@91 1928 case xets of
adamc@91 1929 [] => gs
adamc@91 1930 | (x, _, t) :: rest =>
adamc@91 1931 let
adamc@91 1932 val xc = (x, t)
adamc@91 1933 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1934 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1935 let
adamc@91 1936 val xc' = (x', t')
adamc@91 1937 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1938 in
adamc@91 1939 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1940 end)
adamc@91 1941 gs rest
adamc@91 1942 in
adamc@91 1943 prove (rest, gs)
adamc@91 1944 end
adamc@228 1945
adamc@228 1946 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1947 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1948 in
adamc@255 1949 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1950 ((L'.ERecord xes', loc),
adamc@91 1951 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1952 enD (prove (xes', gsD)) @ gsO)
adamc@91 1953 end
adamc@91 1954
adamc@91 1955 | L.EField (e, c) =>
adamc@91 1956 let
adamc@91 1957 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1958 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1959
adamc@91 1960 val ft = cunif (loc, ktype)
adamc@91 1961 val rest = cunif (loc, ktype_record)
adamc@91 1962 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1963 val () = checkCon env e' et
adamc@629 1964 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 1965 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 1966 in
adamc@628 1967 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 1968 end
adamc@91 1969
adamc@445 1970 | L.EConcat (e1, e2) =>
adamc@339 1971 let
adamc@339 1972 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 1973 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 1974
adamc@445 1975 val r1 = cunif (loc, ktype_record)
adamc@445 1976 val r2 = cunif (loc, ktype_record)
adamc@445 1977
adamc@629 1978 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 1979 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 1980
adamc@628 1981 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 1982 in
adamc@445 1983 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 1984 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 1985 gs1 @ gs2 @ enD gs3)
adamc@339 1986 end
adamc@149 1987 | L.ECut (e, c) =>
adamc@149 1988 let
adamc@149 1989 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1990 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1991
adamc@149 1992 val ft = cunif (loc, ktype)
adamc@149 1993 val rest = cunif (loc, ktype_record)
adamc@149 1994 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1995
adamc@629 1996 val () = checkCon env e' et
adamc@629 1997 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1998
adamc@628 1999 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 2000 in
adamc@228 2001 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2002 gs1 @ enD gs2 @ enD gs3)
adamc@149 2003 end
adamc@493 2004 | L.ECutMulti (e, c) =>
adamc@493 2005 let
adamc@493 2006 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 2007 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 2008
adamc@493 2009 val rest = cunif (loc, ktype_record)
adamc@629 2010
adamc@629 2011 val () = checkCon env e' et
adamc@629 2012 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 2013
adamc@628 2014 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 2015 in
adamc@493 2016 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2017 gs1 @ enD gs2 @ enD gs3)
adamc@493 2018 end
adamc@149 2019
adamc@171 2020 | L.ECase (e, pes) =>
adamc@171 2021 let
adamc@171 2022 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 2023 val result = cunif (loc, (L'.KType, loc))
adamc@171 2024 val (pes', gs) = ListUtil.foldlMap
adamc@171 2025 (fn ((p, e), gs) =>
adamc@171 2026 let
adamc@628 2027 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 2028
adamc@629 2029 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 2030 in
adamc@628 2031 checkPatCon env p' pt et;
adamc@629 2032 checkCon env e' et' result;
adamc@628 2033 ((p', e'), gs1 @ gs)
adamc@171 2034 end)
adamc@171 2035 gs1 pes
adamc@171 2036 in
adamc@819 2037 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 2038 NONE => ()
adamc@830 2039 | SOME p => if !mayDelay then
adamc@830 2040 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 2041 else
adamc@830 2042 expError env (Inexhaustive (loc, p));
adamc@172 2043
adamc@628 2044 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 2045 end
adamc@447 2046
adamc@447 2047 | L.ELet (eds, e) =>
adamc@447 2048 let
adamc@447 2049 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 2050 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 2051 in
adamc@825 2052 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 2053 end
adamc@280 2054 in
adamc@819 2055 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 2056 r
adamc@91 2057 end
adamc@31 2058
adamc@628 2059 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 2060 let
adamc@447 2061 val r =
adamc@447 2062 case d of
adamc@825 2063 L.EDVal (p, e) =>
adamc@447 2064 let
adamc@825 2065 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 2066 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 2067
adamc@825 2068 val () = checkCon env e' et pt
adamc@825 2069
adamc@825 2070 val pt = normClassConstraint env pt
adamc@447 2071 in
adamc@830 2072 case exhaustive (env, et, [p'], loc) of
adamc@830 2073 NONE => ()
adamc@830 2074 | SOME p => if !mayDelay then
adamc@830 2075 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 2076 else
adamc@830 2077 expError env (Inexhaustive (loc, p));
adamc@830 2078
adamc@825 2079 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 2080 end
adamc@447 2081 | L.EDValRec vis =>
adamc@447 2082 let
adamc@447 2083 fun allowable (e, _) =
adamc@447 2084 case e of
adamc@447 2085 L.EAbs _ => true
adamc@447 2086 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 2087 | L.EKAbs (_, e) => allowable e
adamc@447 2088 | L.EDisjoint (_, _, e) => allowable e
adamc@447 2089 | _ => false
adamc@447 2090
adamc@447 2091 val (vis, gs) = ListUtil.foldlMap
adamc@447 2092 (fn ((x, co, e), gs) =>
adamc@447 2093 let
adamc@447 2094 val (c', _, gs1) = case co of
adamc@447 2095 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 2096 | SOME c => elabCon (env, denv) c
adamc@447 2097 in
adamc@447 2098 ((x, c', e), enD gs1 @ gs)
adamc@447 2099 end) gs vis
adamc@447 2100
adamc@447 2101 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 2102
adamc@447 2103 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 2104 let
adamc@447 2105 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 2106 in
adamc@628 2107 checkCon env e' et c';
adamc@447 2108 if allowable e then
adamc@447 2109 ()
adamc@447 2110 else
adamc@447 2111 expError env (IllegalRec (x, e'));
adamc@628 2112 ((x, c', e'), gs1 @ gs)
adamc@447 2113 end) gs vis
adamc@447 2114 in
adamc@447 2115 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 2116 end
adamc@447 2117 in
adamc@447 2118 r
adamc@447 2119 end
adamc@447 2120
adamc@42 2121 val hnormSgn = E.hnormSgn
adamc@31 2122
adamc@210 2123 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 2124 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 2125 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2126 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2127 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2128 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2129
adamc@469 2130 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2131 case E.lookupStr env str of
adamc@469 2132 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2133 denv)
adamc@469 2134 | SOME (n, sgn) =>
adamc@469 2135 let
adamc@469 2136 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2137 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2138 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2139 (strerror, sgnerror))
adamc@469 2140 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2141 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2142
adamc@1030 2143 fun collect first (st, sgn) =
adamc@1030 2144 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182 2145 NONE => []
adamc@1030 2146 | SOME cs =>
adamc@1030 2147 case #1 (hnormSgn env sgn) of
adamc@1030 2148 L'.SgnConst sgis =>
adamc@1030 2149 foldl (fn (sgi, cs) =>
adamc@1030 2150 case #1 sgi of
adamc@1030 2151 L'.SgiStr (x, _, _) =>
adamc@1030 2152 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2153 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2154 | SOME sgn' =>
adamc@1030 2155 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2156 cs))
adamc@1030 2157 | _ => cs) cs sgis
adamc@1030 2158 | _ => cs
adamc@469 2159 in
adamc@1030 2160 foldl (fn ((c1, c2), denv) =>
adamc@1030 2161 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2162 end
adamc@469 2163
adamc@88 2164 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270 2165 ((*Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));*)
adamc@1270 2166 case sgi of
adamc@1270 2167 L.SgiConAbs (x, k) =>
adamc@1270 2168 let
adamc@1270 2169 val k' = elabKind env k
adamc@1270 2170
adamc@1270 2171 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270 2172 in
adamc@1270 2173 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270 2174 end
adamc@1270 2175
adamc@1270 2176 | L.SgiCon (x, ko, c) =>
adamc@1270 2177 let
adamc@1270 2178 val k' = case ko of
adamc@1270 2179 NONE => kunif loc
adamc@1270 2180 | SOME k => elabKind env k
adamc@1270 2181
adamc@1270 2182 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2183 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270 2184 in
adamc@1270 2185 checkKind env c' ck k';
adamc@1270 2186
adamc@1270 2187 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2188 end
adamc@1270 2189
adamc@1270 2190 | L.SgiDatatype dts =>
adamc@1270 2191 let
adamc@1270 2192 val k = (L'.KType, loc)
adamc@1270 2193
adamc@1270 2194 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270 2195 let
adamc@1270 2196 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2197 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270 2198 in
adamc@1270 2199 ((x, n, xs, xcs), env)
adamc@1270 2200 end)
adamc@1270 2201 env dts
adamc@1270 2202
adamc@1270 2203 val (dts, env) = ListUtil.foldlMap
adamc@1270 2204 (fn ((x, n, xs, xcs), env) =>
adamc@1270 2205 let
adamc@1270 2206 val t = (L'.CNamed n, loc)
adamc@1270 2207 val nxs = length xs - 1
adamc@1270 2208 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270 2209 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270 2210
adamc@1270 2211 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270 2212 (E.pushCRel env' x k,
adamc@1270 2213 D.enter denv')) (env, denv) xs
adamc@1270 2214
adamc@1270 2215 val (xcs, (used, env, gs)) =
adamc@1270 2216 ListUtil.foldlMap
adamc@1270 2217 (fn ((x, to), (used, env, gs)) =>
adamc@1270 2218 let
adamc@1270 2219 val (to, t, gs') = case to of
adamc@1270 2220 NONE => (NONE, t, gs)
adamc@1270 2221 | SOME t' =>
adamc@1270 2222 let
adamc@1270 2223 val (t', tk, gs') =
adamc@1270 2224 elabCon (env', denv') t'
adamc@1270 2225 in
adamc@1270 2226 checkKind env' t' tk k;
adamc@1270 2227 (SOME t',
adamc@1270 2228 (L'.TFun (t', t), loc),
adamc@1270 2229 gs' @ gs)
adamc@1270 2230 end
adamc@1270 2231 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2232 t xs
adamc@1270 2233
adamc@1270 2234 val (env, n') = E.pushENamed env x t
adamc@1270 2235 in
adamc@1270 2236 if SS.member (used, x) then
adamc@1270 2237 strError env (DuplicateConstructor (x, loc))
adamc@1270 2238 else
adamc@1270 2239 ();
adamc@1270 2240 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270 2241 end)
adamc@1270 2242 (SS.empty, env, []) xcs
adamc@1270 2243 in
adamc@1270 2244 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270 2245 end)
adamc@1270 2246 env dts
adamc@1270 2247 in
adamc@1270 2248 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270 2249 end
adamc@1270 2250
adamc@1270 2251 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270 2252
adamc@1270 2253 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270 2254 (case E.lookupStr env m1 of
adamc@1270 2255 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270 2256 ([], (env, denv, gs)))
adamc@1270 2257 | SOME (n, sgn) =>
adamc@1270 2258 let
adamc@1270 2259 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270 2260 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270 2261 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270 2262 (strerror, sgnerror))
adamc@1270 2263 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270 2264 ((L'.StrVar n, loc), sgn) ms
adamc@1270 2265 in
adamc@1270 2266 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270 2267 (L'.CModProj (n, ms, s), _) =>
adamc@1270 2268 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270 2269 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270 2270 ([], (env, denv, [])))
adamc@1270 2271 | SOME (xs, xncs) =>
adamc@1270 2272 let
adamc@1270 2273 val k = (L'.KType, loc)
adamc@1270 2274 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2275
adamc@1270 2276 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270 2277 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270 2278 val env = E.pushDatatype env n' xs xncs
adamc@1270 2279
adamc@1270 2280 val t = (L'.CNamed n', loc)
adamc@1270 2281 val env = foldl (fn ((x, n, to), env) =>
adamc@805 2282 let
adamc@1270 2283 val t = case to of
adamc@1270 2284 NONE => t
adamc@1270 2285 | SOME t' => (L'.TFun (t', t), loc)
adamc@1270 2286
adamc@1270 2287 val t = foldr (fn (x, t) =>
adamc@1270 2288 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2289 t xs
adamc@805 2290 in
adamc@1270 2291 E.pushENamedAs env x n t
adamc@1270 2292 end) env xncs
adamc@1270 2293 in
adamc@1270 2294 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270 2295 end)
adamc@1270 2296 | _ => (strError env (NotDatatype loc);
adamc@1270 2297 ([], (env, denv, [])))
adamc@1270 2298 end)
adamc@1270 2299
adamc@1270 2300 | L.SgiVal (x, c) =>
adamc@1270 2301 let
adamc@1270 2302 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2303
adamc@1270 2304 val old = c'
adamc@1270 2305 val c' = normClassConstraint env c'
adamc@1270 2306 val (env', n) = E.pushENamed env x c'
adamc@1270 2307 in
adamc@1270 2308 (unifyKinds env ck ktype
adamc@1270 2309 handle KUnify ue => strError env (NotType (loc, ck, ue)));
adamc@1270 2310
adamc@1270 2311 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2312 end
adamc@1270 2313
adamc@1270 2314 | L.SgiTable (x, c, pe, ce) =>
adamc@1270 2315 let
adamc@1270 2316 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270 2317
adamc@1270 2318 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2319 val pkey = cunif (loc, cstK)
adamc@1270 2320 val visible = cunif (loc, cstK)
adamc@1270 2321 val (env', ds, uniques) =
adamc@1270 2322 case (#1 pe, #1 ce) of
adamc@1270 2323 (L.EVar (["Basis"], "no_primary_key", _), L.EVar (["Basis"], "no_constraint", _)) =>
adamc@1270 2324 let
adamc@1270 2325 val x' = x ^ "_hidden_constraints"
adamc@1270 2326 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adamc@1270 2327 val hidden = (L'.CNamed hidden_n, loc)
adamc@1270 2328 in
adamc@1270 2329 (env', [(L'.SgiConAbs (x', hidden_n, cstK), loc)], (L'.CConcat (visible, hidden), loc))
adamc@1270 2330 end
adamc@1270 2331 | _ => (env, [], visible)
adamc@1270 2332
adamc@1270 2333 val ct = tableOf ()
adamc@1270 2334 val ct = (L'.CApp (ct, c'), loc)
adamc@1270 2335 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270 2336
adamc@1270 2337 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270 2338 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2339 | _ => NONE) gs''
adamc@707 2340
adamc@1270 2341 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270 2342 val pst = (L'.CApp (pst, c'), loc)
adamc@1270 2343 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270 2344
adamc@1270 2345 val (env', n) = E.pushENamed env' x ct
adamc@1270 2346
adamc@1270 2347 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270 2348 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270 2349 | _ => NONE) gs'''
adamc@1270 2350
adamc@1270 2351 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270 2352 val cst = (L'.CApp (cst, c'), loc)
adamc@1270 2353 val cst = (L'.CApp (cst, visible), loc)
adamc@1270 2354 in
adamc@1270 2355 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270 2356 checkCon env' pe' pet pst;
adamc@1270 2357 checkCon env' ce' cet cst;
adamc@1270 2358
adamc@1270 2359 (ds @ [(L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270 2360 end
adamc@1270 2361
adamc@1270 2362 | L.SgiStr (x, sgn) =>
adamc@1270 2363 let
adamc@1270 2364 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2365 val (env', n) = E.pushStrNamed env x sgn'
adamc@1270 2366 in
adamc@1270 2367 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2368 end
adamc@1270 2369
adamc@1270 2370 | L.SgiSgn (x, sgn) =>
adamc@1270 2371 let
adamc@1270 2372 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2373 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270 2374 in
adamc@1270 2375 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2376 end
adamc@1270 2377
adamc@1270 2378 | L.SgiInclude sgn =>
adamc@1270 2379 let
adamc@1270 2380 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2381 in
adamc@1270 2382 case #1 (hnormSgn env sgn') of
adamc@1270 2383 L'.SgnConst sgis =>
adamc@1270 2384 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270 2385 | _ => (sgnError env (NotIncludable sgn');
adamc@1270 2386 ([], (env, denv, [])))
adamc@1270 2387 end
adamc@1270 2388
adamc@1270 2389 | L.SgiConstraint (c1, c2) =>
adamc@1270 2390 let
adamc@1270 2391 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270 2392 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270 2393
adamc@1270 2394 val denv = D.assert env denv (c1', c2')
adamc@1270 2395 in
adamc@1270 2396 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@1270 2397 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@1270 2398
adamc@1270 2399 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270 2400 end
adamc@1270 2401
adamc@1270 2402 | L.SgiClassAbs (x, k) =>
adamc@1270 2403 let
adamc@1270 2404 val k = elabKind env k
adamc@1270 2405 val (env, n) = E.pushCNamed env x k NONE
adamc@1270 2406 val env = E.pushClass env n
adamc@1270 2407 in
adamc@1270 2408 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270 2409 end
adamc@1270 2410
adamc@1270 2411 | L.SgiClass (x, k, c) =>
adamc@1270 2412 let
adamc@1270 2413 val k = elabKind env k
adamc@1270 2414 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270 2415 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270 2416 val env = E.pushClass env n
adamc@1270 2417 in
adamc@1270 2418 checkKind env c' ck k;
adamc@1270 2419 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270 2420 end)
adamc@211 2421
adamc@83 2422 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2423 case sgn of
adamc@31 2424 L.SgnConst sgis =>
adamc@31 2425 let
adamc@88 2426 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2427
adamc@62 2428 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2429 case sgi of
adamc@62 2430 L'.SgiConAbs (x, _, _) =>
adamc@62 2431 (if SS.member (cons, x) then
adamc@62 2432 sgnError env (DuplicateCon (loc, x))
adamc@62 2433 else
adamc@62 2434 ();
adamc@62 2435 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2436 | L'.SgiCon (x, _, _, _) =>
adamc@62 2437 (if SS.member (cons, x) then
adamc@62 2438 sgnError env (DuplicateCon (loc, x))
adamc@62 2439 else
adamc@62 2440 ();
adamc@62 2441 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2442 | L'.SgiDatatype dts =>
adamc@156 2443 let
adamc@805 2444 val (cons, vals) =
adamc@805 2445 let
adamc@805 2446 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2447 let
adamc@805 2448 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2449 (if SS.member (vals, x) then
adamc@805 2450 sgnError env (DuplicateVal (loc, x))
adamc@805 2451 else
adamc@805 2452 ();
adamc@805 2453 SS.add (vals, x)))
adamc@805 2454 vals xncs
adamc@805 2455 in
adamc@805 2456 if SS.member (cons, x) then
adamc@805 2457 sgnError env (DuplicateCon (loc, x))
adamc@805 2458 else
adamc@805 2459 ();
adamc@805 2460 (SS.add (cons, x), vals)
adamc@805 2461 end
adamc@805 2462 in
adamc@805 2463 foldl doOne (cons, vals) dts
adamc@805 2464 end
adamc@156 2465 in
adamc@805 2466 (cons, vals, sgns, strs)
adamc@156 2467 end
adamc@191 2468 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2469 (if SS.member (cons, x) then
adamc@156 2470 sgnError env (DuplicateCon (loc, x))
adamc@156 2471 else
adamc@156 2472 ();
adamc@156 2473 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2474 | L'.SgiVal (x, _, _) =>
adamc@62 2475 (if SS.member (vals, x) then
adamc@62 2476 sgnError env (DuplicateVal (loc, x))
adamc@62 2477 else
adamc@62 2478 ();
adamc@62 2479 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2480 | L'.SgiSgn (x, _, _) =>
adamc@62 2481 (if SS.member (sgns, x) then
adamc@62 2482 sgnError env (DuplicateSgn (loc, x))
adamc@62 2483 else
adamc@62 2484 ();
adamc@62 2485 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2486 | L'.SgiStr (x, _, _) =>
adamc@62 2487 (if SS.member (strs, x) then
adamc@62 2488 sgnError env (DuplicateStr (loc, x))
adamc@62 2489 else
adamc@62 2490 ();
adamc@88 2491 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2492 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2493 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2494 (if SS.member (cons, x) then
adamc@211 2495 sgnError env (DuplicateCon (loc, x))
adamc@211 2496 else
adamc@211 2497 ();
adamc@211 2498 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2499 | L'.SgiClass (x, _, _, _) =>
adamc@211 2500 (if SS.member (cons, x) then
adamc@211 2501 sgnError env (DuplicateCon (loc, x))
adamc@211 2502 else
adamc@211 2503 ();
adamc@460 2504 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2505 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2506 in
adamc@83 2507 ((L'.SgnConst sgis', loc), gs)
adamc@31 2508 end
adamc@31 2509 | L.SgnVar x =>
adamc@31 2510 (case E.lookupSgn env x of
adamc@31 2511 NONE =>
adamc@31 2512 (sgnError env (UnboundSgn (loc, x));
adamc@83 2513 ((L'.SgnError, loc), []))
adamc@83 2514 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2515 | L.SgnFun (m, dom, ran) =>
adamc@41 2516 let
adamc@83 2517 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2518 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2519 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2520 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2521 in
adamc@83 2522 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2523 end
adamc@42 2524 | L.SgnWhere (sgn, x, c) =>
adamc@42 2525 let
adamc@83 2526 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2527 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2528 in
adamc@42 2529 case #1 (hnormSgn env sgn') of
adamc@83 2530 L'.SgnError => (sgnerror, [])
adamc@42 2531 | L'.SgnConst sgis =>
adamc@75 2532 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2533 x' = x andalso
adamc@623 2534 (unifyKinds env k ck
adamc@75 2535 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2536 true)
adamc@42 2537 | _ => false) sgis then
adamc@83 2538 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2539 else
adamc@42 2540 (sgnError env (UnWhereable (sgn', x));
adamc@83 2541 (sgnerror, []))
adamc@42 2542 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2543 (sgnerror, []))
adamc@42 2544 end
adamc@59 2545 | L.SgnProj (m, ms, x) =>
adamc@59 2546 (case E.lookupStr env m of
adamc@59 2547 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2548 (sgnerror, []))
adamc@59 2549 | SOME (n, sgn) =>
adamc@59 2550 let
adamc@59 2551 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2552 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2553 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2554 (strerror, sgnerror))
adamc@59 2555 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2556 ((L'.StrVar n, loc), sgn) ms
adamc@59 2557 in
adamc@59 2558 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2559 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2560 (sgnerror, []))
adamc@83 2561 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2562 end)
adamc@59 2563
adamc@31 2564
adamc@706 2565 and selfify env {str, strs, sgn} =
adamc@66 2566 case #1 (hnormSgn env sgn) of
adamc@66 2567 L'.SgnError => sgn
adamc@66 2568 | L'.SgnVar _ => sgn
adamc@66 2569
adamc@66 2570 | L'.SgnConst sgis =>
adamc@805 2571 (L'.SgnConst (ListUtil.mapConcat (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@805 2572 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2573 | (L'.SgiDatatype dts, loc) =>
adamc@805 2574 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@563 2575 | (L'.SgiClassAbs (x, n, k), loc) =>
adamc@805 2576 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@66 2577 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@805 2578 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adamc@805 2579 | x => [x]) sgis), #2 sgn)
adamc@66 2580 | L'.SgnFun _ => sgn
adamc@66 2581 | L'.SgnWhere _ => sgn
adamc@66 2582 | L'.SgnProj (m, ms, x) =>
adamc@66 2583 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2584 (L'.StrVar m, #2 sgn) ms,
adamc@66 2585 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2586 field = x} of
adamc@66 2587 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2588 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2589
adamc@706 2590 and selfifyAt env {str, sgn} =
adamc@66 2591 let
adamc@66 2592 fun self (str, _) =
adamc@66 2593 case str of
adamc@66 2594 L'.StrVar x => SOME (x, [])
adamc@66 2595 | L'.StrProj (str, x) =>
adamc@66 2596 (case self str of
adamc@66 2597 NONE => NONE
adamc@66 2598 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2599 | _ => NONE
adamc@66 2600 in
adamc@66 2601 case self str of
adamc@66 2602 NONE => sgn
adamc@66 2603 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2604 end
adamc@66 2605
adamc@706 2606 and dopen env {str, strs, sgn} =
adamc@66 2607 let
adamc@66 2608 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2609 (L'.StrVar str, #2 sgn) strs
adamc@66 2610 in
adamc@66 2611 case #1 (hnormSgn env sgn) of
adamc@66 2612 L'.SgnConst sgis =>
adamc@805 2613 ListUtil.foldlMapConcat
adamc@805 2614 (fn ((sgi, loc), env') =>
adamc@805 2615 let
adamc@805 2616 val d =
adamc@805 2617 case sgi of
adamc@805 2618 L'.SgiConAbs (x, n, k) =>
adamc@805 2619 let
adamc@805 2620 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2621 in
adamc@805 2622 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2623 end
adamc@805 2624 | L'.SgiCon (x, n, k, c) =>
adamc@805 2625 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adamc@805 2626 | L'.SgiDatatype dts =>
adamc@805 2627 map (fn (x, n, xs, xncs) => (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adamc@805 2628 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@805 2629 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adamc@805 2630 | L'.SgiVal (x, n, t) =>
adamc@805 2631 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adamc@805 2632 | L'.SgiStr (x, n, sgn) =>
adamc@805 2633 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adamc@805 2634 | L'.SgiSgn (x, n, sgn) =>
adamc@805 2635 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adamc@805 2636 | L'.SgiConstraint (c1, c2) =>
adamc@805 2637 [(L'.DConstraint (c1, c2), loc)]
adamc@805 2638 | L'.SgiClassAbs (x, n, k) =>
adamc@805 2639 let
adamc@805 2640 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2641 in
adamc@805 2642 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2643 end
adamc@805 2644 | L'.SgiClass (x, n, k, _) =>
adamc@805 2645 let
adamc@805 2646 val c = (L'.CModProj (str, strs, x), loc)
adamc@805 2647 in
adamc@805 2648 [(L'.DCon (x, n, k, c), loc)]
adamc@805 2649 end
adamc@805 2650 in
adamc@805 2651 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 2652 end)
adamc@805 2653 env sgis
adamc@66 2654 | _ => (strError env (UnOpenable sgn);
adamc@628 2655 ([], env))
adamc@66 2656 end
adamc@66 2657
adamc@706 2658 and sgiOfDecl (d, loc) =
adamc@31 2659 case d of
adamc@123 2660 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2661 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2662 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2663 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2664 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2665 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2666 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2667 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2668 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2669 | L'.DExport _ => []
adamc@707 2670 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 2671 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 2672 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 2673 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 2674 | L'.DView (tn, x, n, _, c) =>
adamc@754 2675 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@563 2676 | L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271 2677 | L'.DDatabase _ => []
adamc@460 2678 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 2679 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075 2680 | L'.DTask _ => []
adamc@1199 2681 | L'.DPolicy _ => []
adam@1294 2682 | L'.DOnError _ => []
adamc@88 2683
adamc@1000 2684 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 2685 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2686 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2687 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2688 (L'.SgnError, _) => ()
adamc@31 2689 | (_, L'.SgnError) => ()
adamc@31 2690
adamc@31 2691 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2692 let
adamc@362 2693 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2694 ("sgn2", p_sgn env sgn2),
adamc@362 2695 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2696 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2697
adamc@838 2698 fun cpart n = IM.find (!counterparts, n)
adamc@838 2699 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 2700
adamc@838 2701 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 2702 con = fn c =>
adamc@838 2703 case c of
adamc@838 2704 L'.CNamed n2 =>
adamc@838 2705 (case cpart n2 of
adamc@838 2706 NONE => c
adamc@838 2707 | SOME n1 => L'.CNamed n1)
adamc@838 2708 | _ => c}
adamc@838 2709
adamc@628 2710 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 2711 let
adamc@362 2712 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2713
adamc@805 2714 fun seek' f p =
adamc@31 2715 let
adamc@628 2716 fun seek env ls =
adamc@31 2717 case ls of
adamc@805 2718 [] => f env
adamc@31 2719 | h :: t =>
adamc@469 2720 case p (env, h) of
adamc@469 2721 NONE =>
adamc@469 2722 let
adamc@469 2723 val env = case #1 h of
adamc@469 2724 L'.SgiCon (x, n, k, c) =>
adamc@471 2725 if E.checkENamed env n then
adamc@471 2726 env
adamc@471 2727 else
adamc@471 2728 E.pushCNamedAs env x n k (SOME c)
adamc@469 2729 | L'.SgiConAbs (x, n, k) =>
adamc@471 2730 if E.checkENamed env n then
adamc@471 2731 env
adamc@471 2732 else
adamc@471 2733 E.pushCNamedAs env x n k NONE
adamc@469 2734 | _ => env
adamc@469 2735 in
adamc@628 2736 seek (E.sgiBinds env h) t
adamc@469 2737 end
adamc@88 2738 | SOME envs => envs
adamc@31 2739 in
adamc@628 2740 seek env sgis1
adamc@31 2741 end
adamc@805 2742
adamc@1000 2743 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 2744 env))
adamc@31 2745 in
adamc@31 2746 case sgi of
adamc@31 2747 L'.SgiConAbs (x, n2, k2) =>
adamc@469 2748 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31 2749 let
adamc@41 2750 fun found (x', n1, k1, co1) =
adamc@41 2751 if x = x' then
adamc@41 2752 let
adamc@623 2753 val () = unifyKinds env k1 k2
adamc@41 2754 handle KUnify (k1, k2, err) =>
adamc@1000 2755 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 2756 sgi2All, k2, err))
adamc@41 2757 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2758 in
adamc@41 2759 SOME (if n1 = n2 then
adamc@41 2760 env
adamc@41 2761 else
adamc@838 2762 (cparts (n2, n1);
adamc@838 2763 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 2764 end
adamc@41 2765 else
adamc@41 2766 NONE
adamc@31 2767 in
adamc@31 2768 case sgi1 of
adamc@41 2769 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2770 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 2771 | L'.SgiDatatype dts =>
adamc@191 2772 let
adamc@191 2773 val k = (L'.KType, loc)
adamc@805 2774
adamc@805 2775 fun search dts =
adamc@805 2776 case dts of
adamc@805 2777 [] => NONE
adamc@805 2778 | (x', n1, xs, _) :: dts =>
adamc@805 2779 let
adamc@805 2780 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 2781 in
adamc@805 2782 case found (x', n1, k', NONE) of
adamc@805 2783 NONE => search dts
adamc@805 2784 | x => x
adamc@805 2785 end
adamc@191 2786 in
adamc@805 2787 search dts
adamc@191 2788 end
adamc@191 2789 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2790 let
adamc@191 2791 val k = (L'.KType, loc)
adamc@191 2792 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2793 in
adamc@191 2794 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2795 end
adamc@711 2796 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 2797 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 2798 | _ => NONE
adamc@31 2799 end)
adamc@31 2800
adamc@31 2801 | L'.SgiCon (x, n2, k2, c2) =>
adamc@469 2802 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2803 let
adamc@211 2804 fun found (x', n1, k1, c1) =
adamc@211 2805 if x = x' then
adamc@211 2806 let
adamc@838 2807 val c2 = sub2 c2
adamc@838 2808
adamc@327 2809 fun good () =
adamc@327 2810 let
adamc@327 2811 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2812 val env = if n1 = n2 then
adamc@327 2813 env
adamc@327 2814 else
adamc@839 2815 (cparts (n2, n1);
adamc@839 2816 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 2817 in
adamc@628 2818 SOME env
adamc@327 2819 end
adamc@211 2820 in
adamc@987 2821 (unifyCons env loc c1 c2;
adamc@628 2822 good ())
adamc@211 2823 handle CUnify (c1, c2, err) =>
adamc@1000 2824 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 2825 sgi2All, c2, err));
adamc@211 2826 good ())
adamc@211 2827 end
adamc@211 2828 else
adamc@211 2829 NONE
adamc@211 2830 in
adamc@211 2831 case sgi1 of
adamc@211 2832 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 2833 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2834 | _ => NONE
adamc@211 2835 end)
adamc@31 2836
adamc@805 2837 | L'.SgiDatatype dts2 =>
adamc@805 2838 let
adamc@805 2839 fun found' (sgi1All, (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 2840 if x1 <> x2 then
adamc@805 2841 NONE
adamc@805 2842 else
adamc@805 2843 let
adamc@805 2844 fun mismatched ue =
adamc@1000 2845 (sgnError env (SgiMismatchedDatatypes (strLoc, sgi1All, sgi2All, ue));
adamc@805 2846 SOME env)
adamc@805 2847
adamc@805 2848 val k = (L'.KType, loc)
adamc@805 2849 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 2850
adamc@805 2851 fun good () =
adamc@805 2852 let
adamc@805 2853 val env = E.sgiBinds env sgi1All
adamc@805 2854 val env = if n1 = n2 then
adamc@805 2855 env
adamc@805 2856 else
adamc@838 2857 (cparts (n2, n1);
adamc@838 2858 E.pushCNamedAs env x1 n2 k'
adamc@838 2859 (SOME (L'.CNamed n1, loc)))
adamc@805 2860 in
adamc@805 2861 SOME env
adamc@805 2862 end
adamc@805 2863
adamc@805 2864 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 2865 val env = if n1 = n2 then
adamc@805 2866 env
adamc@805 2867 else
adamc@838 2868 (cparts (n2, n1);
adamc@838 2869 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 2870 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 2871 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 2872 String.compare (x1, x2) <> EQUAL
adamc@805 2873 orelse case (t1, t2) of
adamc@805 2874 (NONE, NONE) => false
adamc@805 2875 | (SOME t1, SOME t2) =>
adamc@987 2876 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 2877 | _ => true
adamc@805 2878 in
adamc@805 2879 (if xs1 <> xs2
adamc@805 2880 orelse length xncs1 <> length xncs2
adamc@805 2881 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 2882 mismatched NONE
adamc@160 2883 else
adamc@805 2884 good ())
adamc@805 2885 handle CUnify ue => mismatched (SOME ue)
adamc@805 2886 end
adamc@805 2887 in
adamc@805 2888 seek'
adamc@805 2889 (fn _ =>
adamc@805 2890 let
adamc@805 2891 fun seekOne (dt2, env) =
adamc@805 2892 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2893 case sgi1 of
adamc@805 2894 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 2895 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 2896 | _ => NONE)
adamc@805 2897
adamc@805 2898 fun seekAll (dts, env) =
adamc@805 2899 case dts of
adamc@805 2900 [] => env
adamc@805 2901 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 2902 in
adamc@805 2903 seekAll (dts2, env)
adamc@805 2904 end)
adamc@805 2905 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 2906 let
adamc@805 2907 fun found dts1 =
adamc@805 2908 let
adamc@805 2909 fun iter (dts1, dts2, env) =
adamc@805 2910 case (dts1, dts2) of
adamc@805 2911 ([], []) => SOME env
adamc@805 2912 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 2913 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 2914 NONE => NONE
adamc@805 2915 | SOME env => iter (dts1, dts2, env))
adamc@805 2916 | _ => NONE
adamc@805 2917 in
adamc@805 2918 iter (dts1, dts2, env)
adamc@805 2919 end
adamc@805 2920 in
adamc@805 2921 case sgi1 of
adamc@805 2922 L'.SgiDatatype dts1 => found dts1
adamc@805 2923 | _ => NONE
adamc@805 2924 end)
adamc@805 2925 end
adamc@156 2926
adamc@191 2927 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469 2928 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158 2929 case sgi1 of
adamc@191 2930 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2931 if x = x' then
adamc@158 2932 let
adamc@158 2933 val k = (L'.KType, loc)
adamc@191 2934 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2935 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2936 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2937
adamc@158 2938 fun good () =
adamc@158 2939 let
adamc@191 2940 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2941 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2942 in
adamc@838 2943 cparts (n2, n1);
adamc@628 2944 SOME env
adamc@158 2945 end
adamc@158 2946 in
adamc@987 2947 (unifyCons env loc t1 t2;
adamc@628 2948 good ())
adamc@158 2949 handle CUnify (c1, c2, err) =>
adamc@1000 2950 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@158 2951 good ())
adamc@158 2952 end
adamc@158 2953 else
adamc@158 2954 NONE
adamc@158 2955
adamc@158 2956 | _ => NONE)
adamc@156 2957
adamc@32 2958 | L'.SgiVal (x, n2, c2) =>
adamc@469 2959 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32 2960 case sgi1 of
adamc@41 2961 L'.SgiVal (x', n1, c1) =>
adamc@41 2962 if x = x' then
adamc@838 2963 ((*prefaces "val" [("x", PD.string x),
adamc@838 2964 ("n1", PD.string (Int.toString n1)),
adamc@838 2965 ("c1", p_con env c1),
adamc@838 2966 ("c2", p_con env c2),
adamc@838 2967 ("c2'", p_con env (sub2 c2))];*)
adamc@987 2968 unifyCons env loc c1 (sub2 c2);
adamc@628 2969 SOME env)
adamc@86 2970 handle CUnify (c1, c2, err) =>
adamc@1000 2971 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1, sgi2All, c2, err));
adamc@628 2972 SOME env)
adamc@41 2973 else
adamc@41 2974 NONE
adamc@32 2975 | _ => NONE)
adamc@32 2976
adamc@33 2977 | L'.SgiStr (x, n2, sgn2) =>
adamc@469 2978 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33 2979 case sgi1 of
adamc@41 2980 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2981 if x = x' then
adamc@66 2982 let
adamc@1000 2983 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@66 2984 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2985 val env = if n1 = n2 then
adamc@66 2986 env
adamc@66 2987 else
adamc@66 2988 E.pushStrNamedAs env x n2
adamc@66 2989 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2990 sgn = sgn2})
adamc@66 2991 in
adamc@628 2992 SOME env
adamc@66 2993 end
adamc@41 2994 else
adamc@41 2995 NONE
adamc@33 2996 | _ => NONE)
adamc@59 2997
adamc@59 2998 | L'.SgiSgn (x, n2, sgn2) =>
adamc@469 2999 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59 3000 case sgi1 of
adamc@59 3001 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 3002 if x = x' then
adamc@65 3003 let
adamc@1000 3004 val () = subSgn' counterparts env strLoc sgn1 sgn2
adamc@1000 3005 val () = subSgn' counterparts env strLoc sgn2 sgn1
adamc@65 3006
adamc@65 3007 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 3008 val env = if n1 = n2 then
adamc@65 3009 env
adamc@65 3010 else
adamc@838 3011 (cparts (n2, n1);
adamc@838 3012 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 3013 in
adamc@628 3014 SOME env
adamc@65 3015 end
adamc@59 3016 else
adamc@59 3017 NONE
adamc@59 3018 | _ => NONE)
adamc@88 3019
adamc@88 3020 | L'.SgiConstraint (c2, d2) =>
adamc@469 3021 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88 3022 case sgi1 of
adamc@88 3023 L'.SgiConstraint (c1, d1) =>
adamc@987 3024 if consEq env loc (c1, c2)
adamc@987 3025 andalso consEq env loc (d1, d2) then
adamc@628 3026 SOME env
adamc@88 3027 else
adamc@88 3028 NONE
adamc@88 3029 | _ => NONE)
adamc@203 3030
adamc@563 3031 | L'.SgiClassAbs (x, n2, k2) =>
adamc@469 3032 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 3033 let
adamc@563 3034 fun found (x', n1, k1, co) =
adamc@211 3035 if x = x' then
adamc@211 3036 let
adamc@623 3037 val () = unifyKinds env k1 k2
adamc@563 3038 handle KUnify (k1, k2, err) =>
adamc@1000 3039 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 3040 sgi2All, k2, err))
adamc@563 3041
adamc@711 3042 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 3043 in
adamc@211 3044 SOME (if n1 = n2 then
adamc@211 3045 env
adamc@211 3046 else
adamc@838 3047 (cparts (n2, n1);
adamc@838 3048 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 3049 end
adamc@211 3050 else
adamc@211 3051 NONE
adamc@211 3052 in
adamc@211 3053 case sgi1 of
adamc@563 3054 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 3055 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 3056 | _ => NONE
adamc@211 3057 end)
adamc@563 3058 | L'.SgiClass (x, n2, k2, c2) =>
adamc@469 3059 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 3060 let
adamc@563 3061 fun found (x', n1, k1, c1) =
adamc@211 3062 if x = x' then
adamc@211 3063 let
adamc@623 3064 val () = unifyKinds env k1 k2
adamc@563 3065 handle KUnify (k1, k2, err) =>
adamc@1000 3066 sgnError env (SgiWrongKind (strLoc, sgi1All, k1,
adamc@1000 3067 sgi2All, k2, err))
adamc@563 3068
adamc@838 3069 val c2 = sub2 c2
adamc@838 3070
adamc@218 3071 fun good () =
adamc@218 3072 let
adamc@711 3073 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 3074 val env = if n1 = n2 then
adamc@218 3075 env
adamc@218 3076 else
adamc@839 3077 (cparts (n2, n1);
adamc@839 3078 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 3079 in
adamc@628 3080 SOME env
adamc@218 3081 end
adamc@211 3082 in
adamc@987 3083 (unifyCons env loc c1 c2;
adamc@628 3084 good ())
adamc@211 3085 handle CUnify (c1, c2, err) =>
adamc@1000 3086 (sgnError env (SgiWrongCon (strLoc, sgi1All, c1,
adamc@1000 3087 sgi2All, c2, err));
adamc@211 3088 good ())
adamc@211 3089 end
adamc@211 3090 else
adamc@211 3091 NONE
adamc@211 3092 in
adamc@211 3093 case sgi1 of
adamc@563 3094 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3095 | _ => NONE
adamc@211 3096 end)
adamc@31 3097 end
adamc@31 3098 in
adamc@628 3099 ignore (foldl folder env sgis2)
adamc@31 3100 end
adamc@31 3101
adamc@41 3102 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 3103 let
adamc@480 3104 val ran2 =
adamc@43 3105 if n1 = n2 then
adamc@480 3106 ran2
adamc@43 3107 else
adamc@480 3108 subStrInSgn (n2, n1) ran2
adamc@43 3109 in
adamc@1000 3110 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 3111 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 3112 end
adamc@41 3113
adamc@1000 3114 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 3115
adamc@838 3116 and subSgn env = subSgn' (ref IM.empty) env
adamc@61 3117
adamc@706 3118 and positive self =
adamc@312 3119 let
adamc@312 3120 open L
adamc@312 3121
adamc@312 3122 fun none (c, _) =
adamc@312 3123 case c of
adamc@312 3124 CAnnot (c, _) => none c
adamc@312 3125
adamc@312 3126 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 3127 | TCFun (_, _, _, c) => none c
adamc@312 3128 | TRecord c => none c
adamc@312 3129
adamc@312 3130 | CVar ([], x) => x <> self
adamc@312 3131 | CVar _ => true
adamc@312 3132 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3133 | CAbs _ => false
adamc@628 3134 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3135
adamc@623 3136 | CKAbs _ => false
adamc@623 3137 | TKFun _ => false
adamc@623 3138
adamc@312 3139 | CName _ => true
adamc@312 3140
adamc@312 3141 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3142 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3143 | CMap => true
adamc@312 3144
adamc@312 3145 | CUnit => true
adamc@312 3146
adamc@312 3147 | CTuple cs => List.all none cs
adamc@312 3148 | CProj (c, _) => none c
adamc@312 3149
adamc@312 3150 | CWild _ => false
adamc@312 3151
adamc@312 3152 fun pos (c, _) =
adamc@312 3153 case c of
adamc@312 3154 CAnnot (c, _) => pos c
adamc@312 3155
adamc@312 3156 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3157 | TCFun (_, _, _, c) => pos c
adamc@312 3158 | TRecord c => pos c
adamc@312 3159
adamc@312 3160 | CVar _ => true
adamc@312 3161 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3162 | CAbs _ => false
adamc@628 3163 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3164
adamc@623 3165 | CKAbs _ => false
adamc@623 3166 | TKFun _ => false
adamc@623 3167
adamc@312 3168 | CName _ => true
adamc@312 3169
adamc@312 3170 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3171 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3172 | CMap => true
adamc@312 3173
adamc@312 3174 | CUnit => true
adamc@312 3175
adamc@312 3176 | CTuple cs => List.all pos cs
adamc@312 3177 | CProj (c, _) => pos c
adamc@312 3178
adamc@312 3179 | CWild _ => false
adamc@312 3180 in
adamc@312 3181 pos
adamc@312 3182 end
adamc@312 3183
adamc@706 3184 and wildifyStr env (str, sgn) =
adamc@325 3185 case #1 (hnormSgn env sgn) of
adamc@325 3186 L'.SgnConst sgis =>
adamc@325 3187 (case #1 str of
adamc@325 3188 L.StrConst ds =>
adamc@325 3189 let
adamc@1270 3190 fun cname d =
adamc@1270 3191 case d of
adamc@1270 3192 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270 3193 | L'.SgiConAbs (x, _, _) => SOME x
adamc@1270 3194 | L'.SgiClass (x, _, _, _) => SOME x
adamc@1270 3195 | L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270 3196 | _ => NONE
adamc@1270 3197
adamc@1270 3198 fun dname (d, _) =
adamc@1270 3199 case d of
adamc@1270 3200 L.DCon (x, _, _) => SOME x
adamc@1270 3201 | L.DClass (x, _, _) => SOME x
adamc@1270 3202 | _ => NONE
adamc@1270 3203
adamc@493 3204 fun decompileKind (k, loc) =
adamc@493 3205 case k of
adamc@493 3206 L'.KType => SOME (L.KType, loc)
adamc@493 3207 | L'.KArrow (k1, k2) =>
adamc@493 3208 (case (decompileKind k1, decompileKind k2) of
adamc@493 3209 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3210 | _ => NONE)
adamc@493 3211 | L'.KName => SOME (L.KName, loc)
adamc@493 3212 | L'.KRecord k =>
adamc@493 3213 (case decompileKind k of
adamc@493 3214 SOME k => SOME (L.KRecord k, loc)
adamc@493 3215 | _ => NONE)
adamc@493 3216 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3217 | L'.KTuple ks =>
adamc@493 3218 let
adamc@493 3219 val ks' = List.mapPartial decompileKind ks
adamc@493 3220 in
adamc@493 3221 if length ks' = length ks then
adamc@493 3222 SOME (L.KTuple ks', loc)
adamc@493 3223 else
adamc@493 3224 NONE
adamc@493 3225 end
adamc@493 3226
adamc@493 3227 | L'.KError => NONE
adamc@493 3228 | L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493 3229 | L'.KUnif _ => NONE
adamc@493 3230
adamc@623 3231 | L'.KRel _ => NONE
adamc@623 3232 | L'.KFun _ => NONE
adamc@623 3233
adamc@325 3234 fun decompileCon env (c, loc) =
adamc@325 3235 case c of
adamc@325 3236 L'.CRel i =>
adamc@325 3237 let
adamc@325 3238 val (s, _) = E.lookupCRel env i
adamc@325 3239 in
adamc@325 3240 SOME (L.CVar ([], s), loc)
adamc@325 3241 end
adamc@325 3242 | L'.CNamed i =>
adamc@325 3243 let
adamc@325 3244 val (s, _, _) = E.lookupCNamed env i
adamc@325 3245 in
adamc@325 3246 SOME (L.CVar ([], s), loc)
adamc@325 3247 end
adamc@325 3248 | L'.CModProj (m1, ms, x) =>
adamc@325 3249 let
adamc@325 3250 val (s, _) = E.lookupStrNamed env m1
adamc@325 3251 in
adamc@325 3252 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3253 end
adamc@325 3254 | L'.CName s => SOME (L.CName s, loc)
adamc@325 3255 | L'.CRecord (_, xcs) =>
adamc@325 3256 let
adamc@325 3257 fun fields xcs =
adamc@325 3258 case xcs of
adamc@325 3259 [] => SOME []
adamc@325 3260 | (x, t) :: xcs =>
adamc@325 3261 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3262 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3263 | _ => NONE
adamc@325 3264 in
adamc@325 3265 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 3266 (fields xcs)
adamc@325 3267 end
adamc@325 3268 | L'.CConcat (c1, c2) =>
adamc@325 3269 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3270 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3271 | _ => NONE)
adamc@325 3272 | L'.CUnit => SOME (L.CUnit, loc)
adamc@913 3273 | L'.CUnif (_, _, _, ref (SOME c)) => decompileCon env c
adamc@325 3274
adamc@325 3275 | _ => NONE
adamc@325 3276
adamc@1264 3277 fun buildNeeded env sgis =
adamc@1275 3278 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264 3279 (case sgi of
adamc@1275 3280 L'.SgiCon (x, _, k, c) => naddCon (nd, x, (k, SOME c))
adamc@1275 3281 | L'.SgiConAbs (x, _, k) => naddCon (nd, x, (k, NONE))
adamc@1264 3282 | L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264 3283 | L'.SgiVal (x, _, t) =>
adamc@1264 3284 let
adamc@1277 3285 fun should t =
adamc@1277 3286 let
adamc@1277 3287 val t = normClassConstraint env' t
adamc@1277 3288 in
adamc@1277 3289 case #1 t of
adamc@1277 3290 L'.CApp (f, _) => isClassOrFolder env' f
adamc@1277 3291 | L'.TRecord t =>
adamc@1277 3292 (case hnormCon env' t of
adamc@1277 3293 (L'.CApp (f, _), _) =>
adamc@1277 3294 (case hnormCon env' f of
adamc@1277 3295 (L'.CApp (f, cl), loc) =>
adamc@1277 3296 (case hnormCon env' f of
adamc@1277 3297 (L'.CMap _, _) => isClassOrFolder env' cl
adamc@1277 3298 | _ => false)
adamc@1277 3299 | _ => false)
adamc@1277 3300 | _ => false)
adamc@1277 3301 | _ => false
adamc@1277 3302 end
adamc@1270 3303 in
adamc@1277 3304 if should t then
adamc@1277 3305 naddVal (nd, x)
adamc@1277 3306 else
adamc@1277 3307 nd
adamc@1264 3308 end
adamc@1264 3309 | L'.SgiStr (x, _, s) =>
adamc@1270 3310 (case #1 (hnormSgn env' s) of
adamc@1270 3311 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264 3312 | _ => nd)
adamc@1264 3313 | _ => nd,
adamc@1275 3314 E.sgiBinds env' (sgi, loc)))
adamc@1275 3315 (nempty, env) sgis)
adamc@1264 3316
adamc@1264 3317 val nd = buildNeeded env sgis
adamc@1264 3318
adamc@1264 3319 fun removeUsed (nd, ds) =
adamc@1264 3320 foldl (fn ((d, _), nd) =>
adamc@634 3321 case d of
adamc@1264 3322 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264 3323 | L.DClass (x, _, _) => ndelCon (nd, x)
adamc@1264 3324 | L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264 3325 | L.DOpen _ => nempty
adamc@1264 3326 | L.DStr (x, _, (L.StrConst ds', _)) =>
adamc@1264 3327 (case SM.find (nmods nd, x) of
adamc@1264 3328 NONE => nd
adamc@1270 3329 | SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264 3330 | _ => nd)
adamc@1264 3331 nd ds
adamc@1264 3332
adamc@1264 3333 val nd = removeUsed (nd, ds)
adamc@1264 3334
adamc@1270 3335 fun extend (env, nd, ds) =
adamc@1264 3336 let
adamc@1264 3337 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264 3338 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264 3339 (SOME c1, SOME c2) =>
adamc@1264 3340 SOME (L.DConstraint (c1, c2), loc)
adamc@1264 3341 | _ => NONE) (nconstraints nd)
adamc@1264 3342
adamc@1264 3343 val ds' =
adamc@1264 3344 case SS.listItems (nvals nd) of
adamc@1264 3345 [] => ds'
adamc@1264 3346 | xs =>
adamc@1264 3347 let
adamc@1264 3348 val ewild = (L.EWild, #2 str)
adamc@1264 3349 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264 3350 in
adamc@1264 3351 ds'' @ ds'
adamc@1264 3352 end
adamc@1264 3353
adamc@1275 3354 val ds' =
adamc@1264 3355 case SM.listItemsi (ncons nd) of
adamc@1275 3356 [] => ds'
adamc@1264 3357 | xs =>
adamc@1275 3358 map (fn (x, (k, co)) =>
adamc@1270 3359 let
adamc@1270 3360 val k =
adamc@1270 3361 case decompileKind k of
adamc@1270 3362 NONE => (L.KWild, #2 str)
adamc@1270 3363 | SOME k => k
adamc@1275 3364
adamc@1270 3365 val cwild = (L.CWild k, #2 str)
adamc@1270 3366 val c =
adamc@1270 3367 case co of
adamc@1270 3368 NONE => cwild
adamc@1270 3369 | SOME c =>
adamc@1270 3370 case decompileCon env c of
adamc@1270 3371 NONE => cwild
adamc@1270 3372 | SOME c' => c'
adamc@1270 3373 in
adamc@1275 3374 (L.DCon (x, NONE, c), #2 str)
adamc@1275 3375 end) xs @ ds'
adamc@1275 3376
adamc@1275 3377 val ds = ds @ ds'
adamc@1264 3378 in
adamc@1270 3379 map (fn d as (L.DStr (x, s, (L.StrConst ds', loc')), loc) =>
adamc@1270 3380 (case SM.find (nmods nd, x) of
adamc@1270 3381 NONE => d
adamc@1270 3382 | SOME (env, nd') =>
adamc@1270 3383 (L.DStr (x, s, (L.StrConst (extend (env, nd', ds')), loc')), loc))
adamc@1270 3384 | d => d) ds
adamc@1264 3385 end
adamc@325 3386 in
adamc@1270 3387 (L.StrConst (extend (env, nd, ds)), #2 str)
adamc@325 3388 end
adamc@325 3389 | _ => str)
adamc@325 3390 | _ => str
adamc@325 3391
adamc@706 3392 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3393 let
adamc@904 3394 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3395 (*val befor = Time.now ()*)
adamc@255 3396
adamc@255 3397 val r =
adamc@255 3398 case d of
adamc@255 3399 L.DCon (x, ko, c) =>
adamc@255 3400 let
adamc@255 3401 val k' = case ko of
adamc@255 3402 NONE => kunif loc
adamc@623 3403 | SOME k => elabKind env k
adamc@255 3404
adamc@255 3405 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3406 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3407 in
adamc@255 3408 checkKind env c' ck k';
adamc@255 3409
adamc@255 3410 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3411 end
adamc@805 3412 | L.DDatatype dts =>
adamc@255 3413 let
adamc@255 3414 val k = (L'.KType, loc)
adamc@805 3415
adamc@805 3416 val (dts, env) = ListUtil.foldlMap
adamc@805 3417 (fn ((x, xs, xcs), env) =>
adamc@805 3418 let
adamc@805 3419 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3420 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3421 in
adamc@805 3422 ((x, n, xs, xcs), env)
adamc@805 3423 end)
adamc@805 3424 env dts
adamc@805 3425
adamc@805 3426 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3427 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3428 let
adamc@805 3429 val t = (L'.CNamed n, loc)
adamc@805 3430 val nxs = length xs - 1
adamc@805 3431 val t = ListUtil.foldli
adamc@805 3432 (fn (i, _, t) =>
adamc@805 3433 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3434
adamc@805 3435 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3436 (E.pushCRel env' x k,
adamc@805 3437 D.enter denv')) (env, denv) xs
adamc@805 3438
adamc@805 3439 val (xcs, (used, env, gs')) =
adamc@805 3440 ListUtil.foldlMap
adamc@805 3441 (fn ((x, to), (used, env, gs)) =>
adamc@805 3442 let
adamc@805 3443 val (to, t, gs') = case to of
adamc@805 3444 NONE => (NONE, t, gs)
adamc@805 3445 | SOME t' =>
adamc@805 3446 let
adamc@805 3447 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3448 in
adamc@805 3449 checkKind env' t' tk k;
adamc@805 3450 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3451 end
adamc@805 3452 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3453
adamc@805 3454 val (env, n') = E.pushENamed env x t
adamc@805 3455 in
adamc@805 3456 if SS.member (used, x) then
adamc@805 3457 strError env (DuplicateConstructor (x, loc))
adamc@805 3458 else
adamc@805 3459 ();
adamc@805 3460 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3461 end)
adamc@805 3462 (SS.empty, env, gs') xcs
adamc@805 3463 in
adamc@805 3464 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3465 end)
adamc@805 3466 (env, []) dts
adamc@255 3467 in
adamc@805 3468 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3469 end
adamc@255 3470
adamc@255 3471 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3472
adamc@255 3473 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3474 (case E.lookupStr env m1 of
adamc@255 3475 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3476 ([], (env, denv, gs)))
adamc@255 3477 | SOME (n, sgn) =>
adamc@255 3478 let
adamc@255 3479 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3480 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3481 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3482 (strerror, sgnerror))
adamc@255 3483 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3484 ((L'.StrVar n, loc), sgn) ms
adamc@255 3485 in
adamc@628 3486 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3487 (L'.CModProj (n, ms, s), _) =>
adamc@255 3488 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3489 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3490 ([], (env, denv, gs)))
adamc@255 3491 | SOME (xs, xncs) =>
adamc@255 3492 let
adamc@255 3493 val k = (L'.KType, loc)
adamc@255 3494 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3495 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3496 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3497 val env = E.pushDatatype env n' xs xncs
adamc@255 3498
adamc@255 3499 val t = (L'.CNamed n', loc)
adamc@844 3500 val nxs = length xs
adamc@844 3501 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3502 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3503 t xs
adamc@255 3504 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3505 let
adamc@255 3506 val t = case to of
adamc@255 3507 NONE => t
adamc@255 3508 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3509
adamc@255 3510 val t = foldr (fn (x, t) =>
adamc@255 3511 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3512 t xs
adamc@255 3513 in
adamc@255 3514 E.pushENamedAs env x n t
adamc@255 3515 end) env xncs
adamc@255 3516 in
adamc@628 3517 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3518 end)
adamc@255 3519 | _ => (strError env (NotDatatype loc);
adamc@255 3520 ([], (env, denv, [])))
adamc@255 3521 end)
adamc@255 3522
adamc@255 3523 | L.DVal (x, co, e) =>
adamc@255 3524 let
adamc@255 3525 val (c', _, gs1) = case co of
adamc@255 3526 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3527 | SOME c => elabCon (env, denv) c
adamc@255 3528
adamc@255 3529 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3530
adamc@629 3531 val () = checkCon env e' et c'
adamc@629 3532
adamc@674 3533 val c' = normClassConstraint env c'
adamc@255 3534 val (env', n) = E.pushENamed env x c'
adamc@255 3535 in
adamc@255 3536 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3537 ("c'", p_con env c')];*)
adamc@628 3538 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3539 end
adamc@255 3540 | L.DValRec vis =>
adamc@255 3541 let
adamc@255 3542 fun allowable (e, _) =
adamc@255 3543 case e of
adamc@255 3544 L.EAbs _ => true
adamc@255 3545 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3546 | L.EKAbs (_, e) => allowable e
adamc@255 3547 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3548 | _ => false
adamc@255 3549
adamc@255 3550 val (vis, gs) = ListUtil.foldlMap
adamc@255 3551 (fn ((x, co, e), gs) =>
adamc@255 3552 let
adamc@255 3553 val (c', _, gs1) = case co of
adamc@255 3554 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3555 | SOME c => elabCon (env, denv) c
adamc@674 3556 val c' = normClassConstraint env c'
adamc@255 3557 in
adamc@255 3558 ((x, c', e), enD gs1 @ gs)
adamc@280 3559 end) gs vis
adamc@255 3560
adamc@255 3561 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3562 let
adamc@255 3563 val (env, n) = E.pushENamed env x c'
adamc@255 3564 in
adamc@255 3565 ((x, n, c', e), env)
adamc@255 3566 end) env vis
adamc@255 3567
adamc@255 3568 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3569 let
adamc@255 3570 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3571 in
adamc@628 3572 checkCon env e' et c';
adamc@255 3573 if allowable e then
adamc@255 3574 ()
adamc@255 3575 else
adamc@255 3576 expError env (IllegalRec (x, e'));
adamc@628 3577 ((x, n, c', e'), gs1 @ gs)
adamc@255 3578 end) gs vis
adamc@255 3579 in
adamc@255 3580 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 3581 end
adamc@255 3582
adamc@255 3583 | L.DSgn (x, sgn) =>
adamc@255 3584 let
adamc@255 3585 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3586 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3587 in
adamc@255 3588 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3589 end
adamc@255 3590
adamc@255 3591 | L.DStr (x, sgno, str) =>
adamc@255 3592 let
adamc@255 3593 val () = if x = "Basis" then
adamc@255 3594 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3595 else
adamc@255 3596 ()
adamc@255 3597
adamc@255 3598 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3599
adamc@255 3600 val (str', sgn', gs') =
adamc@255 3601 case formal of
adamc@255 3602 NONE =>
adamc@255 3603 let
adamc@255 3604 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3605 in
adamc@255 3606 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3607 end
adamc@255 3608 | SOME (formal, gs1) =>
adamc@255 3609 let
adamc@325 3610 val str = wildifyStr env (str, formal)
adamc@255 3611 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3612 in
adamc@1000 3613 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3614 (str', formal, enD gs1 @ gs2)
adamc@255 3615 end
adamc@255 3616
adamc@255 3617 val (env', n) = E.pushStrNamed env x sgn'
adamc@834 3618 val denv' =
adamc@834 3619 case #1 str' of
adamc@834 3620 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1022 3621 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@834 3622 | _ => denv
adamc@255 3623 in
adamc@255 3624 case #1 (hnormSgn env sgn') of
adamc@255 3625 L'.SgnFun _ =>
adamc@255 3626 (case #1 str' of
adamc@255 3627 L'.StrFun _ => ()
adamc@255 3628 | _ => strError env (FunctorRebind loc))
adamc@255 3629 | _ => ();
adamc@834 3630 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv', gs' @ gs))
adamc@255 3631 end
adamc@255 3632
adamc@255 3633 | L.DFfiStr (x, sgn) =>
adamc@255 3634 let
adamc@255 3635 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3636
adamc@255 3637 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3638 in
adamc@255 3639 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3640 end
adamc@255 3641
adamc@255 3642 | L.DOpen (m, ms) =>
adamc@255 3643 (case E.lookupStr env m of
adamc@255 3644 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3645 ([], (env, denv, gs)))
adamc@255 3646 | SOME (n, sgn) =>
adamc@255 3647 let
adamc@1030 3648 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 3649 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 3650 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 3651 (strerror, sgnerror))
adamc@1030 3652 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 3653 ((L'.StrVar n, loc), sgn) ms
adamc@1030 3654
adamc@1030 3655 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 3656
adamc@628 3657 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 3658 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 3659 in
adamc@255 3660 (ds, (env', denv', gs))
adamc@255 3661 end)
adamc@255 3662
adamc@255 3663 | L.DConstraint (c1, c2) =>
adamc@255 3664 let
adamc@255 3665 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3666 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3667 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3668
adamc@628 3669 val denv' = D.assert env denv (c1', c2')
adamc@255 3670 in
adamc@255 3671 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3672 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3673
adamc@628 3674 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 3675 end
adamc@255 3676
adamc@255 3677 | L.DOpenConstraints (m, ms) =>
adamc@255 3678 let
adamc@255 3679 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3680 in
adamc@255 3681 ([], (env, denv, gs))
adamc@255 3682 end
adamc@255 3683
adamc@255 3684 | L.DExport str =>
adamc@255 3685 let
adamc@255 3686 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3687
adamc@255 3688 val sgn =
adamc@255 3689 case #1 (hnormSgn env sgn) of
adamc@255 3690 L'.SgnConst sgis =>
adamc@255 3691 let
adamc@255 3692 fun doOne (all as (sgi, _), env) =
adamc@255 3693 (case sgi of
adamc@255 3694 L'.SgiVal (x, n, t) =>
adamc@325 3695 let
adamc@325 3696 fun doPage (makeRes, ran) =
adamc@628 3697 case hnormCon env ran of
adamc@628 3698 (L'.CApp (tf, arg), _) =>
adamc@628 3699 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 3700 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 3701 (L'.CApp (tf, arg3), _)) =>
adamc@325 3702 (case (basis = !basis_r,
adamc@720 3703 hnormCon env tf, hnormCon env arg3) of
adamc@325 3704 (true,
adamc@720 3705 (L'.CApp (tf, arg2), _),
adamc@628 3706 ((L'.CRecord (_, []), _))) =>
adamc@720 3707 (case (hnormCon env tf) of
adamc@720 3708 (L'.CApp (tf, arg1), _) =>
adamc@720 3709 (case (hnormCon env tf,
adamc@720 3710 hnormCon env arg1,
adamc@720 3711 hnormCon env arg2) of
adamc@720 3712 (tf, arg1,
adamc@720 3713 (L'.CRecord (_, []), _)) =>
adamc@720 3714 let
adamc@720 3715 val t = (L'.CApp (tf, arg1), loc)
adamc@720 3716 val t = (L'.CApp (t, arg2), loc)
adamc@720 3717 val t = (L'.CApp (t, arg3), loc)
adamc@720 3718 val t = (L'.CApp (
adamc@720 3719 (L'.CModProj
adamc@720 3720 (basis, [], "transaction"), loc),
adamc@325 3721 t), loc)
adamc@720 3722 in
adamc@720 3723 (L'.SgiVal (x, n, makeRes t), loc)
adamc@720 3724 end
adamc@325 3725 | _ => all)
adamc@325 3726 | _ => all)
adamc@325 3727 | _ => all)
adamc@325 3728 | _ => all)
adamc@325 3729 | _ => all
adamc@325 3730 in
adamc@628 3731 case hnormCon env t of
adamc@628 3732 (L'.TFun (dom, ran), _) =>
adamc@628 3733 (case hnormCon env dom of
adamc@628 3734 (L'.TRecord domR, _) =>
adamc@325 3735 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3736 loc),
adamc@325 3737 t), loc), ran)
adamc@325 3738 | _ => all)
adamc@325 3739 | _ => doPage (fn t => t, t)
adamc@325 3740 end
adamc@255 3741 | _ => all,
adamc@255 3742 E.sgiBinds env all)
adamc@255 3743 in
adamc@255 3744 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3745 end
adamc@255 3746 | _ => sgn
adamc@255 3747 in
adamc@255 3748 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3749 end
adamc@255 3750
adamc@707 3751 | L.DTable (x, c, pe, ce) =>
adamc@255 3752 let
adamc@707 3753 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 3754
adamc@255 3755 val (c', k, gs') = elabCon (env, denv) c
adamc@707 3756 val pkey = cunif (loc, cstK)
adamc@707 3757 val uniques = cunif (loc, cstK)
adamc@705 3758
adamc@705 3759 val ct = tableOf ()
adamc@705 3760 val ct = (L'.CApp (ct, c'), loc)
adamc@707 3761 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 3762
adamc@705 3763 val (env, n) = E.pushENamed env x ct
adamc@707 3764 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 3765 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 3766
adamc@707 3767 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 3768 val pst = (L'.CApp (pst, c'), loc)
adamc@707 3769 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 3770
adamc@704 3771 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 3772 val cst = (L'.CApp (cst, c'), loc)
adamc@705 3773 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 3774 in
adamc@255 3775 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 3776 checkCon env pe' pet pst;
adamc@707 3777 checkCon env ce' cet cst;
adamc@707 3778 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 3779 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 3780 end
adamc@338 3781 | L.DSequence x =>
adamc@338 3782 let
adamc@338 3783 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3784 in
adamc@338 3785 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3786 end
adamc@754 3787 | L.DView (x, e) =>
adamc@754 3788 let
adamc@754 3789 val (e', t, gs') = elabExp (env, denv) e
adamc@754 3790
adamc@754 3791 val k = (L'.KRecord (L'.KType, loc), loc)
adamc@754 3792 val fs = cunif (loc, k)
adamc@754 3793 val ts = cunif (loc, (L'.KRecord k, loc))
adamc@754 3794 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 3795 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 3796 val ts = (L'.CApp (tf, ts), loc)
adamc@754 3797
adamc@754 3798 val cv = viewOf ()
adamc@754 3799 val cv = (L'.CApp (cv, fs), loc)
adamc@754 3800 val (env', n) = E.pushENamed env x cv
adamc@754 3801
adamc@754 3802 val ct = queryOf ()
adamc@1191 3803 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754 3804 val ct = (L'.CApp (ct, ts), loc)
adamc@754 3805 val ct = (L'.CApp (ct, fs), loc)
adamc@754 3806 in
adamc@754 3807 checkCon env e' t ct;
adamc@754 3808 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 3809 (env', denv, gs' @ gs))
adamc@754 3810 end
adamc@255 3811
adamc@563 3812 | L.DClass (x, k, c) =>
adamc@255 3813 let
adamc@623 3814 val k = elabKind env k
adamc@280 3815 val (c', ck, gs') = elabCon (env, denv) c
adamc@711 3816 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3817 val env = E.pushClass env n
adamc@255 3818 in
adamc@711 3819 checkKind env c' ck k;
adamc@563 3820 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3821 end
adamc@271 3822
adamc@280 3823 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3824
adamc@459 3825 | L.DCookie (x, c) =>
adamc@459 3826 let
adamc@459 3827 val (c', k, gs') = elabCon (env, denv) c
adamc@459 3828 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 3829 in
adamc@459 3830 checkKind env c' k (L'.KType, loc);
adamc@459 3831 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 3832 end
adamc@720 3833 | L.DStyle x =>
adamc@718 3834 let
adamc@720 3835 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 3836 in
adamc@720 3837 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 3838 end
adamc@1075 3839 | L.DTask (e1, e2) =>
adamc@1073 3840 let
adamc@1075 3841 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075 3842 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075 3843
adamc@1075 3844 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adamc@1075 3845 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075 3846 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adamc@1073 3847 in
adamc@1075 3848 checkCon env e1' t1 t1';
adamc@1075 3849 checkCon env e2' t2 t2';
adamc@1075 3850 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073 3851 end
adamc@1199 3852 | L.DPolicy e1 =>
adamc@1199 3853 let
adamc@1199 3854 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199 3855
adamc@1199 3856 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199 3857 in
adamc@1199 3858 checkCon env e1' t1 t1';
adamc@1199 3859 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199 3860 end
adamc@459 3861
adam@1294 3862 | L.DOnError (m1, ms, s) =>
adam@1294 3863 (case E.lookupStr env m1 of
adam@1294 3864 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294 3865 ([], (env, denv, [])))
adam@1294 3866 | SOME (n, sgn) =>
adam@1294 3867 let
adam@1294 3868 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294 3869 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294 3870 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294 3871 (strerror, sgnerror))
adam@1294 3872 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294 3873 ((L'.StrVar n, loc), sgn) ms
adam@1294 3874
adam@1294 3875 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294 3876 NONE => (expError env (UnboundExp (loc, s));
adam@1294 3877 cerror)
adam@1294 3878 | SOME t => t
adam@1294 3879
adam@1294 3880 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294 3881 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294 3882 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294 3883 in
adam@1294 3884 unifyCons env loc t func;
adam@1294 3885 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294 3886 end)
adam@1294 3887
adamc@280 3888 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3889 in
adamc@904 3890 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll)];*)
adamc@255 3891 r
adamc@255 3892 end
adamc@211 3893
adamc@83 3894 and elabStr (env, denv) (str, loc) =
adamc@31 3895 case str of
adamc@31 3896 L.StrConst ds =>
adamc@31 3897 let
adamc@88 3898 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3899 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3900
adamc@63 3901 val (sgis, _, _, _, _) =
adamc@64 3902 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3903 case sgi of
adamc@64 3904 L'.SgiConAbs (x, n, k) =>
adamc@64 3905 let
adamc@64 3906 val (cons, x) =
adamc@64 3907 if SS.member (cons, x) then
adamc@64 3908 (cons, "?" ^ x)
adamc@64 3909 else
adamc@64 3910 (SS.add (cons, x), x)
adamc@64 3911 in
adamc@64 3912 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3913 end
adamc@64 3914 | L'.SgiCon (x, n, k, c) =>
adamc@64 3915 let
adamc@64 3916 val (cons, x) =
adamc@64 3917 if SS.member (cons, x) then
adamc@64 3918 (cons, "?" ^ x)
adamc@64 3919 else
adamc@64 3920 (SS.add (cons, x), x)
adamc@64 3921 in
adamc@64 3922 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3923 end
adamc@805 3924 | L'.SgiDatatype dts =>
adamc@156 3925 let
adamc@805 3926 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 3927 let
adamc@805 3928 val (cons, x) =
adamc@805 3929 if SS.member (cons, x) then
adamc@805 3930 (cons, "?" ^ x)
adamc@156 3931 else
adamc@805 3932 (SS.add (cons, x), x)
adamc@805 3933
adamc@805 3934 val (xncs, vals) =
adamc@805 3935 ListUtil.foldlMap
adamc@805 3936 (fn ((x, n, t), vals) =>
adamc@805 3937 if SS.member (vals, x) then
adamc@805 3938 (("?" ^ x, n, t), vals)
adamc@805 3939 else
adamc@805 3940 ((x, n, t), SS.add (vals, x)))
adamc@805 3941 vals xncs
adamc@805 3942 in
adamc@805 3943 ((x, n, xs, xncs), (cons, vals))
adamc@805 3944 end
adamc@805 3945
adamc@805 3946 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 3947 in
adamc@805 3948 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3949 end
adamc@191 3950 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3951 let
adamc@156 3952 val (cons, x) =
adamc@156 3953 if SS.member (cons, x) then
adamc@156 3954 (cons, "?" ^ x)
adamc@156 3955 else
adamc@156 3956 (SS.add (cons, x), x)
adamc@156 3957 in
adamc@191 3958 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3959 end
adamc@64 3960 | L'.SgiVal (x, n, c) =>
adamc@64 3961 let
adamc@64 3962 val (vals, x) =
adamc@64 3963 if SS.member (vals, x) then
adamc@64 3964 (vals, "?" ^ x)
adamc@64 3965 else
adamc@64 3966 (SS.add (vals, x), x)
adamc@64 3967 in
adamc@64 3968 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3969 end
adamc@64 3970 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3971 let
adamc@64 3972 val (sgns, x) =
adamc@64 3973 if SS.member (sgns, x) then
adamc@64 3974 (sgns, "?" ^ x)
adamc@64 3975 else
adamc@64 3976 (SS.add (sgns, x), x)
adamc@64 3977 in
adamc@64 3978 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3979 end
adamc@64 3980
adamc@64 3981 | L'.SgiStr (x, n, sgn) =>
adamc@64 3982 let
adamc@64 3983 val (strs, x) =
adamc@64 3984 if SS.member (strs, x) then
adamc@64 3985 (strs, "?" ^ x)
adamc@64 3986 else
adamc@64 3987 (SS.add (strs, x), x)
adamc@64 3988 in
adamc@64 3989 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3990 end
adamc@203 3991 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 3992 | L'.SgiClassAbs (x, n, k) =>
adamc@211 3993 let
adamc@211 3994 val (cons, x) =
adamc@211 3995 if SS.member (cons, x) then
adamc@211 3996 (cons, "?" ^ x)
adamc@211 3997 else
adamc@211 3998 (SS.add (cons, x), x)
adamc@211 3999 in
adamc@563 4000 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 4001 end
adamc@563 4002 | L'.SgiClass (x, n, k, c) =>
adamc@211 4003 let
adamc@211 4004 val (cons, x) =
adamc@211 4005 if SS.member (cons, x) then
adamc@211 4006 (cons, "?" ^ x)
adamc@211 4007 else
adamc@211 4008 (SS.add (cons, x), x)
adamc@211 4009 in
adamc@563 4010 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 4011 end)
adamc@64 4012
adamc@63 4013 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 4014 in
adamc@83 4015 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 4016 end
adamc@31 4017 | L.StrVar x =>
adamc@31 4018 (case E.lookupStr env x of
adamc@31 4019 NONE =>
adamc@31 4020 (strError env (UnboundStr (loc, x));
adamc@83 4021 (strerror, sgnerror, []))
adamc@83 4022 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 4023 | L.StrProj (str, x) =>
adamc@34 4024 let
adamc@83 4025 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 4026 in
adamc@34 4027 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 4028 NONE => (strError env (UnboundStr (loc, x));
adamc@83 4029 (strerror, sgnerror, []))
adamc@83 4030 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 4031 end
adamc@41 4032 | L.StrFun (m, dom, ranO, str) =>
adamc@41 4033 let
adamc@83 4034 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 4035 val (env', n) = E.pushStrNamed env m dom'
adamc@834 4036 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 4037 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 4038
adamc@83 4039 val (formal, gs3) =
adamc@41 4040 case ranO of
adamc@83 4041 NONE => (actual, [])
adamc@41 4042 | SOME ran =>
adamc@41 4043 let
adamc@834 4044 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 4045 in
adamc@1000 4046 subSgn env' loc actual ran';
adamc@83 4047 (ran', gs)
adamc@41 4048 end
adamc@41 4049 in
adamc@41 4050 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 4051 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 4052 enD gs1 @ gs2 @ enD gs3)
adamc@41 4053 end
adamc@44 4054 | L.StrApp (str1, str2) =>
adamc@44 4055 let
adamc@83 4056 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 4057 val str2 =
adamc@325 4058 case sgn1 of
adamc@325 4059 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275 4060 let
adamc@1275 4061 val s = wildifyStr env (str2, dom)
adamc@1275 4062 in
adamc@1275 4063 (*Print.preface ("Wild", SourcePrint.p_str s);*)
adamc@1275 4064 s
adamc@1275 4065 end
adamc@325 4066 | _ => str2
adamc@83 4067 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270 4068 in
adamc@44 4069 case #1 (hnormSgn env sgn1) of
adamc@83 4070 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4071 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 4072 (subSgn env loc sgn2 dom;
adamc@44 4073 case #1 (hnormSgn env ran) of
adamc@83 4074 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4075 | L'.SgnConst sgis =>
adamc@44 4076 ((L'.StrApp (str1', str2'), loc),
adamc@83 4077 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 4078 gs1 @ gs2)
adamc@44 4079 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 4080 | _ => (strError env (NotFunctor sgn1);
adamc@83 4081 (strerror, sgnerror, []))
adamc@44 4082 end
adamc@31 4083
adamc@987 4084 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 4085
adamc@325 4086 fun elabFile basis topStr topSgn env file =
adamc@56 4087 let
adamc@713 4088 val () = mayDelay := true
adamc@713 4089 val () = delayedUnifs := []
adamc@830 4090 val () = delayedExhaustives := []
adamc@713 4091
adamc@83 4092 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 4093 val () = case gs of
adamc@83 4094 [] => ()
adamc@207 4095 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 4096 prefaces "Unresolved"
adamc@207 4097 [("c1", p_con env c1),
adamc@207 4098 ("c2", p_con env c2)]) gs;
adamc@207 4099 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 4100
adamc@56 4101 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 4102 val () = basis_r := basis_n
adamc@56 4103
adamc@628 4104 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 4105
adamc@56 4106 fun discoverC r x =
adamc@56 4107 case E.lookupC env' x of
adamc@56 4108 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 4109 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 4110 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 4111
adamc@56 4112 val () = discoverC int "int"
adamc@56 4113 val () = discoverC float "float"
adamc@56 4114 val () = discoverC string "string"
adamc@821 4115 val () = discoverC char "char"
adamc@203 4116 val () = discoverC table "sql_table"
adamc@56 4117
adamc@325 4118 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 4119 val () = case gs of
adamc@325 4120 [] => ()
adamc@325 4121 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 4122 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 4123 val () = case gs of
adamc@325 4124 [] => ()
adamc@329 4125 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 4126 (case D.prove env denv (c1, c2, loc) of
adamc@329 4127 [] => ()
adamc@329 4128 | _ =>
adamc@329 4129 (prefaces "Unresolved constraint in top.ur"
adamc@329 4130 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 4131 ("c1", p_con env c1),
adamc@720 4132 ("c2", p_con env c2)];
adamc@478 4133 raise Fail "Unresolved constraint in top.ur"))
adamc@564 4134 | TypeClass (env, c, r, loc) =>
adamc@564 4135 let
adamc@564 4136 val c = normClassKey env c
adamc@564 4137 in
adamc@833 4138 case resolveClass env c of
adamc@564 4139 SOME e => r := SOME e
adamc@564 4140 | NONE => expError env (Unresolvable (loc, c))
adamc@634 4141 end) gs
adamc@564 4142
adamc@1000 4143 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adamc@720 4144
adamc@325 4145 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633 4146 val () = top_r := top_n
adamc@325 4147
adamc@628 4148 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 4149
adamc@713 4150 val checks = ref ([] : (unit -> unit) list)
adamc@713 4151
adamc@83 4152 fun elabDecl' (d, (env, gs)) =
adamc@76 4153 let
adamc@76 4154 val () = resetKunif ()
adamc@76 4155 val () = resetCunif ()
adamc@88 4156 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 4157 in
adamc@713 4158 checks :=
adamc@713 4159 (fn () =>
adamc@713 4160 (if List.exists kunifsInDecl ds then
adamc@713 4161 declError env (KunifsRemain ds)
adamc@713 4162 else
adamc@713 4163 ();
adamc@713 4164
adamc@713 4165 case ListUtil.search cunifsInDecl ds of
adamc@713 4166 NONE => ()
adamc@713 4167 | SOME loc =>
adamc@713 4168 declError env (CunifsRemain ds)))
adamc@713 4169 :: !checks;
adamc@76 4170
adamc@83 4171 (ds, (env, gs))
adamc@76 4172 end
adamc@76 4173
adamc@83 4174 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@753 4175
adamc@777 4176 fun oneSummaryRound () =
adamc@777 4177 if ErrorMsg.anyErrors () then
adamc@777 4178 ()
adamc@777 4179 else
adamc@777 4180 let
adamc@777 4181 val delayed = !delayedUnifs
adamc@777 4182 in
adamc@777 4183 delayedUnifs := [];
adamc@777 4184 app (fn (loc, env, k, s1, s2) =>
adamc@777 4185 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 4186 delayed
adamc@777 4187 end
adamc@56 4188 in
adamc@777 4189 oneSummaryRound ();
adamc@753 4190
adamc@753 4191 if ErrorMsg.anyErrors () then
adamc@753 4192 ()
adamc@753 4193 else
adamc@753 4194 let
adamc@753 4195 fun solver gs =
adamc@753 4196 let
adamc@753 4197 val (gs, solved) =
adamc@753 4198 ListUtil.foldlMapPartial
adamc@753 4199 (fn (g, solved) =>
adamc@753 4200 case g of
adamc@753 4201 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 4202 (case D.prove env denv (c1, c2, loc) of
adamc@753 4203 [] => (NONE, true)
adamc@753 4204 | _ => (SOME g, solved))
adamc@753 4205 | TypeClass (env, c, r, loc) =>
adamc@753 4206 let
adamc@753 4207 fun default () = (SOME g, solved)
adamc@753 4208
adamc@753 4209 val c = normClassKey env c
adamc@753 4210 in
adamc@833 4211 case resolveClass env c of
adamc@753 4212 SOME e => (r := SOME e;
adamc@753 4213 (NONE, true))
adamc@753 4214 | NONE =>
adamc@753 4215 case #1 (hnormCon env c) of
adamc@753 4216 L'.CApp (f, x) =>
adamc@753 4217 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@753 4218 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@753 4219 (case #1 (hnormCon env f) of
adamc@753 4220 L'.CModProj (top_n', [], "folder") =>
adamc@753 4221 if top_n' = top_n then
adamc@753 4222 let
adamc@753 4223 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@753 4224 val e = (L'.EKApp (e, k), loc)
adamc@753 4225
adamc@753 4226 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@753 4227 let
adamc@753 4228 val e = (L'.EModProj (top_n, ["Folder"],
adamc@753 4229 "cons"), loc)
adamc@753 4230 val e = (L'.EKApp (e, k), loc)
adamc@753 4231 val e = (L'.ECApp (e,
adamc@753 4232 (L'.CRecord (k, xcs),
adamc@753 4233 loc)), loc)
adamc@753 4234 val e = (L'.ECApp (e, x), loc)
adamc@753 4235 val e = (L'.ECApp (e, c), loc)
adamc@753 4236 val e = (L'.EApp (e, folder), loc)
adamc@753 4237 in
adamc@753 4238 (e, (x, c) :: xcs)
adamc@753 4239 end)
adamc@753 4240 (e, []) xcs
adamc@753 4241 in
adamc@753 4242 (r := SOME folder;
adamc@753 4243 (NONE, true))
adamc@753 4244 end
adamc@753 4245 else
adamc@753 4246 default ()
adamc@753 4247 | _ => default ())
adamc@753 4248 | _ => default ())
adamc@753 4249 | _ => default ()
adamc@753 4250 end)
adamc@753 4251 false gs
adamc@753 4252 in
adamc@753 4253 case (gs, solved) of
adamc@753 4254 ([], _) => ()
adamc@777 4255 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4256 | _ =>
adamc@753 4257 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@1048 4258 let
adamc@1048 4259 val c1' = ElabOps.hnormCon env c1
adamc@1048 4260 val c2' = ElabOps.hnormCon env c2
adamc@1048 4261
adamc@1048 4262 fun isUnif (c, _) =
adamc@1048 4263 case c of
adamc@1048 4264 L'.CUnif _ => true
adamc@1048 4265 | _ => false
adamc@1048 4266
adamc@1048 4267 fun maybeAttr (c, _) =
adamc@1048 4268 case c of
adamc@1048 4269 L'.CRecord ((L'.KType, _), xts) => true
adamc@1048 4270 | _ => false
adamc@1048 4271 in
adamc@1048 4272 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@1048 4273 eprefaces' [("Con 1", p_con env c1),
adamc@1048 4274 ("Con 2", p_con env c2),
adamc@1048 4275 ("Hnormed 1", p_con env c1'),
adamc@1048 4276 ("Hnormed 2", p_con env c2')];
adamc@1048 4277
adamc@1048 4278 if (isUnif c1' andalso maybeAttr c2')
adamc@1048 4279 orelse (isUnif c2' andalso maybeAttr c1') then
adamc@1048 4280 TextIO.output (TextIO.stdErr,
adamc@1048 4281 "You may be using a disallowed attribute with an HTML tag.\n")
adamc@1048 4282 else
adamc@1048 4283 ()
adamc@1048 4284 end
adamc@753 4285 | TypeClass (env, c, r, loc) =>
adamc@753 4286 expError env (Unresolvable (loc, c)))
adamc@753 4287 gs
adamc@753 4288 end
adamc@753 4289 in
adamc@753 4290 solver gs
adamc@753 4291 end;
adamc@753 4292
adamc@713 4293 mayDelay := false;
adamc@713 4294
adamc@777 4295 if ErrorMsg.anyErrors () then
adamc@777 4296 ()
adamc@777 4297 else
adamc@777 4298 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4299 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adamc@777 4300 handle CUnify' err => (ErrorMsg.errorAt loc "Error in final record unification";
adamc@777 4301 cunifyError env err))
adamc@777 4302 (!delayedUnifs);
adamc@777 4303 delayedUnifs := []);
adamc@713 4304
adamc@713 4305 if ErrorMsg.anyErrors () then
adamc@713 4306 ()
adamc@713 4307 else
adamc@750 4308 app (fn f => f ()) (!checks);
adamc@750 4309
adamc@830 4310 if ErrorMsg.anyErrors () then
adamc@830 4311 ()
adamc@830 4312 else
adamc@837 4313 app (fn all as (env, _, _, loc) =>
adamc@830 4314 case exhaustive all of
adamc@830 4315 NONE => ()
adamc@830 4316 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4317 (!delayedExhaustives);
adamc@830 4318
adamc@799 4319 (*preface ("file", p_file env' file);*)
adamc@799 4320
adamc@325 4321 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4322 :: ds
adamc@325 4323 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4324 :: ds' @ file
adamc@56 4325 end
adamc@2 4326
adamc@2 4327 end