Mercurial > urweb

annotate src/elaborate.sml @ 471:20fab0e96217

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Tree demo working (and other assorted regressions fixed)
author Adam Chlipala <adamc@hcoop.net>
date Thu, 06 Nov 2008 19:43:48 -0500
parents b393c2fc80f8
children 6ee1c761818f
rev   line source
adamc@412 1 (* Copyright (c) 2008, Adam Chlipala
adamc@445 2 * All rights reserved.
adamc@445 3 *
adamc@445 4 * Redistribution and use in source and binary forms, with or without
adamc@445 5 * modification, are permitted provided that the following conditions are met:
adamc@445 6 *
adamc@445 7 * - Redistributions of source code must retain the above copyright notice,
adamc@445 8 * this list of conditions and the following disclaimer.
adamc@445 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445 10 * this list of conditions and the following disclaimer in the documentation
adamc@445 11 * and/or other materials provided with the distribution.
adamc@445 12 * - The names of contributors may not be used to endorse or promote products
adamc@445 13 * derived from this software without specific prior written permission.
adamc@445 14 *
adamc@445 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445 26 *)
adamc@403 27
adamc@403 28 structure Elaborate :> ELABORATE = struct
adamc@403 29
adamc@403 30 structure P = Prim
adamc@403 31 structure L = Source
adamc@403 32 structure L' = Elab
adamc@403 33 structure E = ElabEnv
adamc@403 34 structure U = ElabUtil
adamc@403 35 structure D = Disjoint
adamc@403 36
adamc@403 37 open Print
adamc@403 38 open ElabPrint
adamc@403 39 open ElabErr
adamc@403 40
adamc@403 41 structure IM = IntBinaryMap
adamc@403 42
adamc@403 43 structure SK = struct
adamc@403 44 type ord_key = string
adamc@403 45 val compare = String.compare
adamc@403 46 end
adamc@403 47
adamc@403 48 structure SS = BinarySetFn(SK)
adamc@403 49 structure SM = BinaryMapFn(SK)
adamc@403 50
adamc@403 51 val basis_r = ref 0
adamc@403 52
adamc@403 53 fun elabExplicitness e =
adamc@403 54 case e of
adamc@403 55 L.Explicit => L'.Explicit
adamc@403 56 | L.Implicit => L'.Implicit
adamc@403 57
adamc@403 58 fun occursKind r =
adamc@403 59 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 60 | _ => false)
adamc@403 61
adamc@403 62 exception KUnify' of kunify_error
adamc@403 63
adamc@403 64 fun unifyKinds' (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 65 let
adamc@403 66 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403 67 in
adamc@403 68 case (k1, k2) of
adamc@403 69 (L'.KType, L'.KType) => ()
adamc@403 70 | (L'.KUnit, L'.KUnit) => ()
adamc@403 71
adamc@403 72 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@403 73 (unifyKinds' d1 d2;
adamc@403 74 unifyKinds' r1 r2)
adamc@403 75 | (L'.KName, L'.KName) => ()
adamc@403 76 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' k1 k2
adamc@403 77 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@403 78 ((ListPair.appEq (fn (k1, k2) => unifyKinds' k1 k2) (ks1, ks2))
adamc@403 79 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 80
adamc@403 81 | (L'.KError, _) => ()
adamc@403 82 | (_, L'.KError) => ()
adamc@403 83
adamc@403 84 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' k1All k2All
adamc@403 85 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' k1All k2All
adamc@403 86
adamc@403 87 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403 88 if r1 = r2 then
adamc@403 89 ()
adamc@403 90 else
adamc@403 91 r1 := SOME k2All
adamc@403 92
adamc@403 93 | (L'.KUnif (_, _, r), _) =>
adamc@403 94 if occursKind r k2All then
adamc@403 95 err KOccursCheckFailed
adamc@403 96 else
adamc@403 97 r := SOME k2All
adamc@403 98 | (_, L'.KUnif (_, _, r)) =>
adamc@403 99 if occursKind r k1All then
adamc@403 100 err KOccursCheckFailed
adamc@403 101 else
adamc@403 102 r := SOME k1All
adamc@403 103
adamc@403 104 | _ => err KIncompatible
adamc@403 105 end
adamc@403 106
adamc@403 107 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403 108
adamc@403 109 fun unifyKinds k1 k2 =
adamc@403 110 unifyKinds' k1 k2
adamc@403 111 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403 112
adamc@403 113 fun checkKind env c k1 k2 =
adamc@403 114 unifyKinds k1 k2
adamc@403 115 handle KUnify (k1, k2, err) =>
adamc@403 116 conError env (WrongKind (c, k1, k2, err))
adamc@403 117
adamc@403 118 val dummy = ErrorMsg.dummySpan
adamc@403 119
adamc@403 120 val ktype = (L'.KType, dummy)
adamc@403 121 val kname = (L'.KName, dummy)
adamc@403 122 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 123
adamc@403 124 val cerror = (L'.CError, dummy)
adamc@403 125 val kerror = (L'.KError, dummy)
adamc@403 126 val eerror = (L'.EError, dummy)
adamc@403 127 val sgnerror = (L'.SgnError, dummy)
adamc@403 128 val strerror = (L'.StrError, dummy)
adamc@403 129
adamc@403 130 val int = ref cerror
adamc@403 131 val float = ref cerror
adamc@403 132 val string = ref cerror
adamc@403 133 val table = ref cerror
adamc@403 134
adamc@403 135 local
adamc@403 136 val count = ref 0
adamc@403 137 in
adamc@403 138
adamc@403 139 fun resetKunif () = count := 0
adamc@403 140
adamc@403 141 fun kunif loc =
adamc@403 142 let
adamc@403 143 val n = !count
adamc@403 144 val s = if n <= 26 then
adamc@403 145 str (chr (ord #"A" + n))
adamc@403 146 else
adamc@403 147 "U" ^ Int.toString (n - 26)
adamc@403 148 in
adamc@403 149 count := n + 1;
adamc@403 150 (L'.KUnif (loc, s, ref NONE), dummy)
adamc@403 151 end
adamc@403 152
adamc@403 153 end
adamc@403 154
adamc@403 155 local
adamc@403 156 val count = ref 0
adamc@403 157 in
adamc@403 158
adamc@403 159 fun resetCunif () = count := 0
adamc@403 160
adamc@403 161 fun cunif (loc, k) =
adamc@403 162 let
adamc@403 163 val n = !count
adamc@403 164 val s = if n <= 26 then
adamc@403 165 str (chr (ord #"A" + n))
adamc@403 166 else
adamc@403 167 "U" ^ Int.toString (n - 26)
adamc@403 168 in
adamc@403 169 count := n + 1;
adamc@403 170 (L'.CUnif (loc, k, s, ref NONE), dummy)
adamc@403 171 end
adamc@403 172
adamc@403 173 end
adamc@403 174
adamc@403 175 fun elabKind (k, loc) =
adamc@403 176 case k of
adamc@403 177 L.KType => (L'.KType, loc)
adamc@403 178 | L.KArrow (k1, k2) => (L'.KArrow (elabKind k1, elabKind k2), loc)
adamc@403 179 | L.KName => (L'.KName, loc)
adamc@403 180 | L.KRecord k => (L'.KRecord (elabKind k), loc)
adamc@403 181 | L.KUnit => (L'.KUnit, loc)
adamc@403 182 | L.KTuple ks => (L'.KTuple (map elabKind ks), loc)
adamc@403 183 | L.KWild => kunif loc
adamc@403 184
adamc@403 185 fun foldKind (dom, ran, loc)=
adamc@403 186 (L'.KArrow ((L'.KArrow ((L'.KName, loc),
adamc@403 187 (L'.KArrow (dom,
adamc@403 188 (L'.KArrow (ran, ran), loc)), loc)), loc),
adamc@403 189 (L'.KArrow (ran,
adamc@403 190 (L'.KArrow ((L'.KRecord dom, loc),
adamc@403 191 ran), loc)), loc)), loc)
adamc@403 192
adamc@403 193 fun hnormKind (kAll as (k, _)) =
adamc@403 194 case k of
adamc@403 195 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403 196 | _ => kAll
adamc@403 197
adamc@403 198 fun elabCon (env, denv) (c, loc) =
adamc@403 199 case c of
adamc@403 200 L.CAnnot (c, k) =>
adamc@403 201 let
adamc@403 202 val k' = elabKind k
adamc@403 203 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 204 in
adamc@403 205 checkKind env c' ck k';
adamc@403 206 (c', k', gs)
adamc@403 207 end
adamc@403 208
adamc@403 209 | L.TFun (t1, t2) =>
adamc@403 210 let
adamc@403 211 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 212 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 213 in
adamc@403 214 checkKind env t1' k1 ktype;
adamc@403 215 checkKind env t2' k2 ktype;
adamc@403 216 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 217 end
adamc@403 218 | L.TCFun (e, x, k, t) =>
adamc@403 219 let
adamc@403 220 val e' = elabExplicitness e
adamc@403 221 val k' = elabKind k
adamc@403 222 val env' = E.pushCRel env x k'
adamc@403 223 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 224 in
adamc@403 225 checkKind env t' tk ktype;
adamc@403 226 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 227 end
adamc@403 228 | L.CDisjoint (c1, c2, c) =>
adamc@403 229 let
adamc@403 230 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 231 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 232
adamc@403 233 val ku1 = kunif loc
adamc@403 234 val ku2 = kunif loc
adamc@403 235
adamc@403 236 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@403 237 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 238 in
adamc@403 239 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 240 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@403 241
adamc@403 242 ((L'.CDisjoint (L'.Instantiate, c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
adamc@403 243 end
adamc@403 244 | L.TRecord c =>
adamc@403 245 let
adamc@403 246 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 247 val k = (L'.KRecord ktype, loc)
adamc@403 248 in
adamc@403 249 checkKind env c' ck k;
adamc@403 250 ((L'.TRecord c', loc), ktype, gs)
adamc@403 251 end
adamc@403 252
adamc@403 253 | L.CVar ([], s) =>
adamc@403 254 (case E.lookupC env s of
adamc@403 255 E.NotBound =>
adamc@403 256 (conError env (UnboundCon (loc, s));
adamc@403 257 (cerror, kerror, []))
adamc@403 258 | E.Rel (n, k) =>
adamc@403 259 ((L'.CRel n, loc), k, [])
adamc@403 260 | E.Named (n, k) =>
adamc@403 261 ((L'.CNamed n, loc), k, []))
adamc@403 262 | L.CVar (m1 :: ms, s) =>
adamc@403 263 (case E.lookupStr env m1 of
adamc@403 264 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 265 (cerror, kerror, []))
adamc@403 266 | SOME (n, sgn) =>
adamc@403 267 let
adamc@403 268 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 269 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 270 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 271 (strerror, sgnerror))
adamc@403 272 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 273 ((L'.StrVar n, loc), sgn) ms
adamc@403 274
adamc@403 275 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403 276 NONE => (conError env (UnboundCon (loc, s));
adamc@403 277 kerror)
adamc@403 278 | SOME (k, _) => k
adamc@403 279 in
adamc@403 280 ((L'.CModProj (n, ms, s), loc), k, [])
adamc@403 281 end)
adamc@403 282
adamc@403 283 | L.CApp (c1, c2) =>
adamc@403 284 let
adamc@403 285 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 286 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 287 val dom = kunif loc
adamc@403 288 val ran = kunif loc
adamc@403 289 in
adamc@403 290 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 291 checkKind env c2' k2 dom;
adamc@403 292 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 293 end
adamc@403 294 | L.CAbs (x, ko, t) =>
adamc@403 295 let
adamc@403 296 val k' = case ko of
adamc@403 297 NONE => kunif loc
adamc@403 298 | SOME k => elabKind k
adamc@403 299 val env' = E.pushCRel env x k'
adamc@403 300 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 301 in
adamc@403 302 ((L'.CAbs (x, k', t'), loc),
adamc@403 303 (L'.KArrow (k', tk), loc),
adamc@403 304 gs)
adamc@403 305 end
adamc@403 306
adamc@403 307 | L.CName s =>
adamc@403 308 ((L'.CName s, loc), kname, [])
adamc@403 309
adamc@403 310 | L.CRecord xcs =>
adamc@403 311 let
adamc@403 312 val k = kunif loc
adamc@403 313
adamc@403 314 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 315 let
adamc@403 316 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 317 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 318 in
adamc@403 319 checkKind env x' xk kname;
adamc@403 320 checkKind env c' ck k;
adamc@403 321 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 322 end) [] xcs
adamc@403 323
adamc@403 324 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 325 (* Add duplicate field checking later. *)
adamc@403 326
adamc@403 327 fun prove (xcs, ds) =
adamc@403 328 case xcs of
adamc@403 329 [] => ds
adamc@403 330 | xc :: rest =>
adamc@403 331 let
adamc@403 332 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 333 val ds = foldl (fn (xc', ds) =>
adamc@403 334 let
adamc@403 335 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 336 in
adamc@403 337 D.prove env denv (r1, r2, loc) @ ds
adamc@403 338 end)
adamc@403 339 ds rest
adamc@403 340 in
adamc@403 341 prove (rest, ds)
adamc@403 342 end
adamc@403 343 in
adamc@403 344 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 345 end
adamc@403 346 | L.CConcat (c1, c2) =>
adamc@403 347 let
adamc@403 348 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 349 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 350 val ku = kunif loc
adamc@403 351 val k = (L'.KRecord ku, loc)
adamc@403 352 in
adamc@403 353 checkKind env c1' k1 k;
adamc@403 354 checkKind env c2' k2 k;
adamc@403 355 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 356 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 357 end
adamc@403 358 | L.CFold =>
adamc@403 359 let
adamc@403 360 val dom = kunif loc
adamc@403 361 val ran = kunif loc
adamc@403 362 in
adamc@403 363 ((L'.CFold (dom, ran), loc),
adamc@403 364 foldKind (dom, ran, loc),
adamc@403 365 [])
adamc@403 366 end
adamc@403 367
adamc@403 368 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 369
adamc@403 370 | L.CTuple cs =>
adamc@403 371 let
adamc@403 372 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 373 let
adamc@403 374 val (c', k, gs') = elabCon (env, denv) c
adamc@403 375 in
adamc@403 376 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 377 end) ([], [], []) cs
adamc@403 378 in
adamc@403 379 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 380 end
adamc@403 381 | L.CProj (c, n) =>
adamc@403 382 let
adamc@403 383 val (c', k, gs) = elabCon (env, denv) c
adamc@403 384 in
adamc@403 385 case hnormKind k of
adamc@403 386 (L'.KTuple ks, _) =>
adamc@403 387 if n <= 0 orelse n > length ks then
adamc@403 388 (conError env (ProjBounds (c', n));
adamc@83 389 (cerror, kerror, []))
adamc@403 390 else
adamc@403 391 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@403 392 | k => (conError env (ProjMismatch (c', k));
adamc@403 393 (cerror, kerror, []))
adamc@403 394 end
adamc@403 395
adamc@403 396 | L.CWild k =>
adamc@403 397 let
adamc@403 398 val k' = elabKind k
adamc@403 399 in
adamc@403 400 (cunif (loc, k'), k', [])
adamc@403 401 end
adamc@403 402
adamc@403 403 fun kunifsRemain k =
adamc@403 404 case k of
adamc@403 405 L'.KUnif (_, _, ref NONE) => true
adamc@403 406 | _ => false
adamc@403 407 fun cunifsRemain c =
adamc@403 408 case c of
adamc@403 409 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@403 410 | _ => NONE
adamc@403 411
adamc@403 412 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 413 con = fn _ => false,
adamc@403 414 exp = fn _ => false,
adamc@403 415 sgn_item = fn _ => false,
adamc@403 416 sgn = fn _ => false,
adamc@403 417 str = fn _ => false,
adamc@403 418 decl = fn _ => false}
adamc@403 419
adamc@403 420 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@403 421 con = cunifsRemain,
adamc@403 422 exp = fn _ => NONE,
adamc@403 423 sgn_item = fn _ => NONE,
adamc@403 424 sgn = fn _ => NONE,
adamc@403 425 str = fn _ => NONE,
adamc@403 426 decl = fn _ => NONE}
adamc@403 427
adamc@403 428 fun occursCon r =
adamc@403 429 U.Con.exists {kind = fn _ => false,
adamc@403 430 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@403 431 | _ => false}
adamc@403 432
adamc@403 433 exception CUnify' of cunify_error
adamc@403 434
adamc@403 435 exception SynUnif = E.SynUnif
adamc@403 436
adamc@403 437 open ElabOps
adamc@403 438
adamc@403 439 type record_summary = {
adamc@403 440 fields : (L'.con * L'.con) list,
adamc@403 441 unifs : (L'.con * L'.con option ref) list,
adamc@403 442 others : L'.con list
adamc@403 443 }
adamc@403 444
adamc@403 445 fun summaryToCon {fields, unifs, others} =
adamc@403 446 let
adamc@403 447 val c = (L'.CRecord (ktype, []), dummy)
adamc@403 448 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403 449 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403 450 in
adamc@403 451 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403 452 end
adamc@403 453
adamc@403 454 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 455
adamc@403 456 exception CUnify of L'.con * L'.con * cunify_error
adamc@403 457
adamc@403 458 fun kindof env (c, loc) =
adamc@403 459 case c of
adamc@403 460 L'.TFun _ => ktype
adamc@403 461 | L'.TCFun _ => ktype
adamc@403 462 | L'.TRecord _ => ktype
adamc@403 463
adamc@403 464 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 465 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 466 | L'.CModProj (n, ms, x) =>
adamc@403 467 let
adamc@403 468 val (_, sgn) = E.lookupStrNamed env n
adamc@403 469 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 470 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 471 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 472 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 473 ((L'.StrVar n, loc), sgn) ms
adamc@403 474 in
adamc@403 475 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 476 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 477 | SOME (k, _) => k
adamc@403 478 end
adamc@403 479
adamc@403 480 | L'.CApp (c, _) =>
adamc@403 481 (case hnormKind (kindof env c) of
adamc@403 482 (L'.KArrow (_, k), _) => k
adamc@403 483 | (L'.KError, _) => kerror
adamc@413 484 | k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403 485 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@403 486 | L'.CDisjoint (_, _, _, c) => kindof env c
adamc@403 487
adamc@403 488 | L'.CName _ => kname
adamc@403 489
adamc@403 490 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 491 | L'.CConcat (c, _) => kindof env c
adamc@403 492 | L'.CFold (dom, ran) => foldKind (dom, ran, loc)
adamc@403 493
adamc@403 494 | L'.CUnit => (L'.KUnit, loc)
adamc@403 495
adamc@403 496 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 497 | L'.CProj (c, n) =>
adamc@403 498 (case hnormKind (kindof env c) of
adamc@403 499 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@413 500 | k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403 501
adamc@403 502 | L'.CError => kerror
adamc@403 503 | L'.CUnif (_, k, _, _) => k
adamc@403 504
adamc@403 505 val hnormCon = D.hnormCon
adamc@403 506
adamc@403 507 datatype con_summary =
adamc@403 508 Nil
adamc@403 509 | Cons
adamc@403 510 | Unknown
adamc@403 511
adamc@403 512 fun compatible cs =
adamc@403 513 case cs of
adamc@403 514 (Unknown, _) => false
adamc@403 515 | (_, Unknown) => false
adamc@403 516 | (s1, s2) => s1 = s2
adamc@403 517
adamc@403 518 fun summarizeCon (env, denv) c =
adamc@403 519 let
adamc@403 520 val (c, gs) = hnormCon (env, denv) c
adamc@403 521 in
adamc@403 522 case #1 c of
adamc@403 523 L'.CRecord (_, []) => (Nil, gs)
adamc@403 524 | L'.CRecord (_, _ :: _) => (Cons, gs)
adamc@403 525 | L'.CConcat ((L'.CRecord (_, _ :: _), _), _) => (Cons, gs)
adamc@403 526 | L'.CDisjoint (_, _, _, c) =>
adamc@34 527 let
adamc@403 528 val (s, gs') = summarizeCon (env, denv) c
adamc@34 529 in
adamc@403 530 (s, gs @ gs')
adamc@403 531 end
adamc@403 532 | _ => (Unknown, gs)
adamc@403 533 end
adamc@403 534
adamc@403 535 fun p_con_summary s =
adamc@403 536 Print.PD.string (case s of
adamc@403 537 Nil => "Nil"
adamc@403 538 | Cons => "Cons"
adamc@403 539 | Unknown => "Unknown")
adamc@403 540
adamc@403 541 exception SummaryFailure
adamc@403 542
adamc@403 543 fun unifyRecordCons (env, denv) (c1, c2) =
adamc@403 544 let
adamc@403 545 fun rkindof c =
adamc@403 546 case hnormKind (kindof env c) of
adamc@403 547 (L'.KRecord k, _) => k
adamc@403 548 | (L'.KError, _) => kerror
adamc@413 549 | k => raise CUnify' (CKindof (k, c, "record"))
adamc@403 550
adamc@403 551 val k1 = rkindof c1
adamc@403 552 val k2 = rkindof c2
adamc@403 553
adamc@403 554 val (r1, gs1) = recordSummary (env, denv) c1
adamc@403 555 val (r2, gs2) = recordSummary (env, denv) c2
adamc@403 556 in
adamc@403 557 unifyKinds k1 k2;
adamc@403 558 unifySummaries (env, denv) (k1, r1, r2);
adamc@403 559 gs1 @ gs2
adamc@403 560 end
adamc@403 561
adamc@403 562 and recordSummary (env, denv) c =
adamc@403 563 let
adamc@403 564 val (c, gs) = hnormCon (env, denv) c
adamc@403 565
adamc@403 566 val (sum, gs') =
adamc@403 567 case c of
adamc@403 568 (L'.CRecord (_, xcs), _) => ({fields = xcs, unifs = [], others = []}, [])
adamc@403 569 | (L'.CConcat (c1, c2), _) =>
adamc@403 570 let
adamc@403 571 val (s1, gs1) = recordSummary (env, denv) c1
adamc@403 572 val (s2, gs2) = recordSummary (env, denv) c2
adamc@403 573 in
adamc@403 574 ({fields = #fields s1 @ #fields s2,
adamc@403 575 unifs = #unifs s1 @ #unifs s2,
adamc@403 576 others = #others s1 @ #others s2},
adamc@403 577 gs1 @ gs2)
adamc@403 578 end
adamc@403 579 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary (env, denv) c
adamc@403 580 | c' as (L'.CUnif (_, _, _, r), _) => ({fields = [], unifs = [(c', r)], others = []}, [])
adamc@403 581 | c' => ({fields = [], unifs = [], others = [c']}, [])
adamc@403 582 in
adamc@403 583 (sum, gs @ gs')
adamc@403 584 end
adamc@403 585
adamc@403 586 and consEq (env, denv) (c1, c2) =
adamc@403 587 let
adamc@403 588 val gs = unifyCons (env, denv) c1 c2
adamc@403 589 in
adamc@403 590 List.all (fn (loc, env, denv, c1, c2) =>
adamc@403 591 case D.prove env denv (c1, c2, loc) of
adamc@403 592 [] => true
adamc@403 593 | _ => false) gs
adamc@403 594 end
adamc@403 595 handle CUnify _ => false
adamc@403 596
adamc@403 597 and consNeq env (c1, c2) =
adamc@403 598 case (#1 (ElabOps.hnormCon env c1), #1 (ElabOps.hnormCon env c2)) of
adamc@403 599 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@403 600 | _ => false
adamc@403 601
adamc@403 602 and unifySummaries (env, denv) (k, s1 : record_summary, s2 : record_summary) =
adamc@403 603 let
adamc@403 604 val loc = #2 k
adamc@403 605 (*val () = eprefaces "Summaries" [("#1", p_summary env s1),
adamc@403 606 ("#2", p_summary env s2)]*)
adamc@403 607
adamc@403 608 fun eatMatching p (ls1, ls2) =
adamc@403 609 let
adamc@403 610 fun em (ls1, ls2, passed1) =
adamc@403 611 case ls1 of
adamc@403 612 [] => (rev passed1, ls2)
adamc@403 613 | h1 :: t1 =>
adamc@403 614 let
adamc@403 615 fun search (ls2', passed2) =
adamc@403 616 case ls2' of
adamc@403 617 [] => em (t1, ls2, h1 :: passed1)
adamc@403 618 | h2 :: t2 =>
adamc@403 619 if p (h1, h2) then
adamc@403 620 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 621 else
adamc@403 622 search (t2, h2 :: passed2)
adamc@403 623 in
adamc@403 624 search (ls2, [])
adamc@403 625 end
adamc@403 626 in
adamc@403 627 em (ls1, ls2, [])
adamc@403 628 end
adamc@403 629
adamc@403 630 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 631 not (consNeq env (x1, x2))
adamc@403 632 andalso consEq (env, denv) (c1, c2)
adamc@403 633 andalso consEq (env, denv) (x1, x2))
adamc@403 634 (#fields s1, #fields s2)
adamc@403 635 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 636 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@403 637 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@403 638 val (others1, others2) = eatMatching (consEq (env, denv)) (#others s1, #others s2)
adamc@403 639 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 640 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 641
adamc@403 642 fun unifFields (fs, others, unifs) =
adamc@403 643 case (fs, others, unifs) of
adamc@403 644 ([], [], _) => ([], [], unifs)
adamc@403 645 | (_, _, []) => (fs, others, [])
adamc@403 646 | (_, _, (_, r) :: rest) =>
adamc@403 647 let
adamc@403 648 val r' = ref NONE
adamc@403 649 val kr = (L'.KRecord k, dummy)
adamc@403 650 val cr' = (L'.CUnif (dummy, kr, "recd", r'), dummy)
adamc@403 651
adamc@403 652 val prefix = case (fs, others) of
adamc@403 653 ([], other :: others) =>
adamc@403 654 List.foldl (fn (other, c) =>
adamc@403 655 (L'.CConcat (c, other), dummy))
adamc@403 656 other others
adamc@403 657 | (fs, []) =>
adamc@403 658 (L'.CRecord (k, fs), dummy)
adamc@403 659 | (fs, others) =>
adamc@403 660 List.foldl (fn (other, c) =>
adamc@403 661 (L'.CConcat (c, other), dummy))
adamc@403 662 (L'.CRecord (k, fs), dummy) others
adamc@403 663 in
adamc@403 664 r := SOME (L'.CConcat (prefix, cr'), dummy);
adamc@403 665 ([], [], (cr', r') :: rest)
adamc@403 666 end
adamc@403 667
adamc@403 668 val (fs1, others1, unifs2) = unifFields (fs1, others1, unifs2)
adamc@403 669 val (fs2, others2, unifs1) = unifFields (fs2, others2, unifs1)
adamc@403 670
adamc@403 671 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 672 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 673
adamc@403 674 fun isGuessable (other, fs) =
adamc@403 675 let
adamc@403 676 val gs = guessFold (env, denv) (other, (L'.CRecord (k, fs), loc), [], SummaryFailure)
adamc@403 677 in
adamc@403 678 List.all (fn (loc, env, denv, c1, c2) =>
adamc@403 679 case D.prove env denv (c1, c2, loc) of
adamc@403 680 [] => true
adamc@403 681 | _ => false) gs
adamc@403 682 end
adamc@403 683 handle SummaryFailure => false
adamc@403 684
adamc@403 685 val (fs1, fs2, others1, others2) =
adamc@403 686 case (fs1, fs2, others1, others2) of
adamc@403 687 ([], _, [other1], []) =>
adamc@403 688 if isGuessable (other1, fs2) then
adamc@403 689 ([], [], [], [])
adamc@403 690 else
adamc@403 691 (fs1, fs2, others1, others2)
adamc@403 692 | (_, [], [], [other2]) =>
adamc@403 693 if isGuessable (other2, fs1) then
adamc@403 694 ([], [], [], [])
adamc@403 695 else
adamc@403 696 (fs1, fs2, others1, others2)
adamc@403 697 | _ => (fs1, fs2, others1, others2)
adamc@403 698
adamc@403 699 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 700 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 701
adamc@403 702 val clear = case (fs1, others1, fs2, others2) of
adamc@403 703 ([], [], [], []) => true
adamc@403 704 | _ => false
adamc@403 705 val empty = (L'.CRecord (k, []), dummy)
adamc@403 706
adamc@403 707 fun unsummarize {fields, unifs, others} =
adamc@403 708 let
adamc@403 709 val c = (L'.CRecord (k, fields), loc)
adamc@403 710
adamc@403 711 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@403 712 c unifs
adamc@403 713 in
adamc@403 714 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@403 715 c others
adamc@403 716 end
adamc@403 717
adamc@403 718 fun pairOffUnifs (unifs1, unifs2) =
adamc@403 719 case (unifs1, unifs2) of
adamc@403 720 ([], _) =>
adamc@403 721 if clear then
adamc@403 722 List.app (fn (_, r) => r := SOME empty) unifs2
adamc@403 723 else
adamc@403 724 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@403 725 | (_, []) =>
adamc@403 726 if clear then
adamc@403 727 List.app (fn (_, r) => r := SOME empty) unifs1
adamc@403 728 else
adamc@403 729 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@403 730 | ((c1, _) :: rest1, (_, r2) :: rest2) =>
adamc@403 731 (r2 := SOME c1;
adamc@403 732 pairOffUnifs (rest1, rest2))
adamc@403 733 in
adamc@403 734 pairOffUnifs (unifs1, unifs2)
adamc@403 735 (*before eprefaces "Summaries'" [("#1", p_summary env s1),
adamc@403 736 ("#2", p_summary env s2)]*)
adamc@403 737 end
adamc@403 738
adamc@403 739 and guessFold (env, denv) (c1, c2, gs, ex) =
adamc@403 740 let
adamc@403 741 val loc = #2 c1
adamc@403 742
adamc@403 743 fun unfold (dom, ran, f, i, r, c) =
adamc@403 744 let
adamc@403 745 val nm = cunif (loc, (L'.KName, loc))
adamc@412 746 val v =
adamc@412 747 case dom of
adamc@412 748 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@412 749 | _ => cunif (loc, dom)
adamc@403 750 val rest = cunif (loc, (L'.KRecord dom, loc))
adamc@403 751 val acc = (L'.CFold (dom, ran), loc)
adamc@403 752 val acc = (L'.CApp (acc, f), loc)
adamc@403 753 val acc = (L'.CApp (acc, i), loc)
adamc@403 754 val acc = (L'.CApp (acc, rest), loc)
adamc@403 755
adamc@403 756 val (iS, gs3) = summarizeCon (env, denv) i
adamc@403 757
adamc@403 758 val app = (L'.CApp (f, nm), loc)
adamc@403 759 val app = (L'.CApp (app, v), loc)
adamc@403 760 val app = (L'.CApp (app, acc), loc)
adamc@403 761 val (appS, gs4) = summarizeCon (env, denv) app
adamc@403 762
adamc@403 763 val (cS, gs5) = summarizeCon (env, denv) c
adamc@403 764 in
adamc@403 765 (*prefaces "Summaries" [("iS", p_con_summary iS),
adamc@403 766 ("appS", p_con_summary appS),
adamc@403 767 ("cS", p_con_summary cS)];*)
adamc@403 768
adamc@403 769 if compatible (iS, appS) then
adamc@403 770 raise ex
adamc@403 771 else if compatible (cS, iS) then
adamc@403 772 let
adamc@403 773 (*val () = prefaces "Same?" [("i", p_con env i),
adamc@403 774 ("c", p_con env c)]*)
adamc@403 775 val gs6 = unifyCons (env, denv) i c
adamc@403 776 (*val () = TextIO.print "Yes!\n"*)
adamc@403 777
adamc@403 778 val gs7 = unifyCons (env, denv) r (L'.CRecord (dom, []), loc)
adamc@403 779 in
adamc@403 780 gs @ gs3 @ gs5 @ gs6 @ gs7
adamc@403 781 end
adamc@403 782 else if compatible (cS, appS) then
adamc@403 783 let
adamc@403 784 (*val () = prefaces "Same?" [("app", p_con env app),
adamc@403 785 ("c", p_con env c),
adamc@403 786 ("app'", p_con env (#1 (hnormCon (env, denv) app)))]*)
adamc@403 787 val gs6 = unifyCons (env, denv) app c
adamc@403 788 (*val () = TextIO.print "Yes!\n"*)
adamc@403 789
adamc@403 790 val singleton = (L'.CRecord (dom, [(nm, v)]), loc)
adamc@403 791 val concat = (L'.CConcat (singleton, rest), loc)
adamc@403 792 (*val () = prefaces "Pre-crew" [("r", p_con env r),
adamc@403 793 ("concat", p_con env concat)]*)
adamc@403 794 val gs7 = unifyCons (env, denv) r concat
adamc@403 795 in
adamc@403 796 (*prefaces "The crew" [("nm", p_con env nm),
adamc@403 797 ("v", p_con env v),
adamc@403 798 ("rest", p_con env rest)];*)
adamc@403 799
adamc@403 800 gs @ gs3 @ gs4 @ gs5 @ gs6 @ gs7
adamc@403 801 end
adamc@403 802 else
adamc@403 803 raise ex
adamc@403 804 end
adamc@403 805 handle _ => raise ex
adamc@403 806 in
adamc@403 807 case (#1 c1, #1 c2) of
adamc@403 808 (L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r), _) =>
adamc@403 809 unfold (dom, ran, f, i, r, c2)
adamc@403 810 | (_, L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r)) =>
adamc@403 811 unfold (dom, ran, f, i, r, c1)
adamc@403 812 | _ => raise ex
adamc@403 813 end
adamc@403 814
adamc@403 815 and unifyCons' (env, denv) c1 c2 =
adamc@403 816 case (#1 c1, #1 c2) of
adamc@403 817 (L'.CDisjoint (_, x1, y1, t1), L'.CDisjoint (_, x2, y2, t2)) =>
adamc@403 818 let
adamc@403 819 val gs1 = unifyCons' (env, denv) x1 x2
adamc@403 820 val gs2 = unifyCons' (env, denv) y1 y2
adamc@403 821 val (denv', gs3) = D.assert env denv (x1, y1)
adamc@403 822 val gs4 = unifyCons' (env, denv') t1 t2
adamc@403 823 in
adamc@403 824 gs1 @ gs2 @ gs3 @ gs4
adamc@403 825 end
adamc@403 826 | _ =>
adamc@411 827 case (kindof env c1, kindof env c2) of
adamc@411 828 ((L'.KUnit, _), (L'.KUnit, _)) => []
adamc@411 829 | _ =>
adamc@403 830 let
adamc@411 831 val (c1, gs1) = hnormCon (env, denv) c1
adamc@411 832 val (c2, gs2) = hnormCon (env, denv) c2
adamc@403 833 in
adamc@411 834 let
adamc@411 835 val gs3 = unifyCons'' (env, denv) c1 c2
adamc@411 836 in
adamc@411 837 gs1 @ gs2 @ gs3
adamc@411 838 end
adamc@411 839 handle ex => guessFold (env, denv) (c1, c2, gs1 @ gs2, ex)
adamc@403 840 end
adamc@403 841
adamc@403 842 and unifyCons'' (env, denv) (c1All as (c1, loc)) (c2All as (c2, _)) =
adamc@403 843 let
adamc@403 844 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 845
adamc@403 846 fun isRecord () = unifyRecordCons (env, denv) (c1All, c2All)
adamc@403 847 in
adamc@403 848 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@403 849 ("c2All", p_con env c2All)];*)
adamc@403 850
adamc@403 851 case (c1, c2) of
adamc@403 852 (L'.CUnit, L'.CUnit) => []
adamc@403 853
adamc@403 854 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@403 855 unifyCons' (env, denv) d1 d2
adamc@403 856 @ unifyCons' (env, denv) r1 r2
adamc@403 857 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@403 858 if expl1 <> expl2 then
adamc@403 859 err CExplicitness
adamc@403 860 else
adamc@403 861 (unifyKinds d1 d2;
adamc@403 862 unifyCons' (E.pushCRel env x1 d1, D.enter denv) r1 r2)
adamc@403 863 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' (env, denv) r1 r2
adamc@403 864
adamc@403 865 | (L'.CRel n1, L'.CRel n2) =>
adamc@403 866 if n1 = n2 then
adamc@403 867 []
adamc@403 868 else
adamc@403 869 err CIncompatible
adamc@403 870 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@403 871 if n1 = n2 then
adamc@403 872 []
adamc@403 873 else
adamc@403 874 err CIncompatible
adamc@403 875
adamc@403 876 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@403 877 (unifyCons' (env, denv) d1 d2;
adamc@403 878 unifyCons' (env, denv) r1 r2)
adamc@403 879 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@403 880 (unifyKinds k1 k2;
adamc@403 881 unifyCons' (E.pushCRel env x1 k1, D.enter denv) c1 c2)
adamc@403 882
adamc@403 883 | (L'.CName n1, L'.CName n2) =>
adamc@403 884 if n1 = n2 then
adamc@403 885 []
adamc@403 886 else
adamc@403 887 err CIncompatible
adamc@403 888
adamc@403 889 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@403 890 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@403 891 []
adamc@403 892 else
adamc@403 893 err CIncompatible
adamc@403 894
adamc@403 895 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@403 896 ((ListPair.foldlEq (fn (c1, c2, gs) =>
adamc@403 897 let
adamc@403 898 val gs' = unifyCons' (env, denv) c1 c2
adamc@403 899 in
adamc@403 900 gs' @ gs
adamc@403 901 end) [] (cs1, cs2))
adamc@403 902 handle ListPair.UnequalLengths => err CIncompatible)
adamc@403 903
adamc@403 904 | (L'.CProj ((L'.CUnif (_, _, _, ref (SOME c1)), loc), n1), _) =>
adamc@403 905 unifyCons' (env, denv) (L'.CProj (c1, n1), loc) c2All
adamc@403 906 | (_, L'.CProj ((L'.CUnif (_, _, _, ref (SOME c2)), loc), n2)) =>
adamc@403 907 unifyCons' (env, denv) c1All (L'.CProj (c2, n2), loc)
adamc@403 908 | (L'.CProj ((L'.CUnif (_, (L'.KTuple ks, _), _, r), loc), n), _) =>
adamc@403 909 let
adamc@403 910 val us = map (fn k => cunif (loc, k)) ks
adamc@403 911 in
adamc@403 912 r := SOME (L'.CTuple us, loc);
adamc@403 913 unifyCons' (env, denv) (List.nth (us, n - 1)) c2All
adamc@403 914 end
adamc@403 915 | (_, L'.CProj ((L'.CUnif (_, (L'.KTuple ks, _), _, r), loc), n)) =>
adamc@403 916 let
adamc@403 917 val us = map (fn k => cunif (loc, k)) ks
adamc@403 918 in
adamc@403 919 r := SOME (L'.CTuple us, loc);
adamc@403 920 unifyCons' (env, denv) c1All (List.nth (us, n - 1))
adamc@403 921 end
adamc@403 922 | (L'.CProj (c1, n1), L'.CProj (c2, n2)) =>
adamc@403 923 if n1 = n2 then
adamc@403 924 unifyCons' (env, denv) c1 c2
adamc@403 925 else
adamc@403 926 err CIncompatible
adamc@403 927
adamc@403 928 | (L'.CError, _) => []
adamc@403 929 | (_, L'.CError) => []
adamc@403 930
adamc@403 931 | (L'.CRecord _, _) => isRecord ()
adamc@403 932 | (_, L'.CRecord _) => isRecord ()
adamc@403 933 | (L'.CConcat _, _) => isRecord ()
adamc@403 934 | (_, L'.CConcat _) => isRecord ()
adamc@403 935
adamc@403 936 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@403 937 if r1 = r2 then
adamc@403 938 []
adamc@403 939 else
adamc@403 940 (unifyKinds k1 k2;
adamc@403 941 r1 := SOME c2All;
adamc@403 942 [])
adamc@403 943
adamc@403 944 | (L'.CUnif (_, _, _, r), _) =>
adamc@403 945 if occursCon r c2All then
adamc@403 946 err COccursCheckFailed
adamc@403 947 else
adamc@403 948 (r := SOME c2All;
adamc@403 949 [])
adamc@403 950 | (_, L'.CUnif (_, _, _, r)) =>
adamc@403 951 if occursCon r c1All then
adamc@403 952 err COccursCheckFailed
adamc@403 953 else
adamc@403 954 (r := SOME c1All;
adamc@403 955 [])
adamc@403 956
adamc@403 957 | (L'.CFold (dom1, ran1), L'.CFold (dom2, ran2)) =>
adamc@403 958 (unifyKinds dom1 dom2;
adamc@403 959 unifyKinds ran1 ran2;
adamc@403 960 [])
adamc@403 961
adamc@403 962 | _ => err CIncompatible
adamc@403 963 end
adamc@403 964
adamc@403 965 and unifyCons (env, denv) c1 c2 =
adamc@403 966 unifyCons' (env, denv) c1 c2
adamc@403 967 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 968 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 969
adamc@403 970 fun checkCon (env, denv) e c1 c2 =
adamc@403 971 unifyCons (env, denv) c1 c2
adamc@403 972 handle CUnify (c1, c2, err) =>
adamc@403 973 (expError env (Unify (e, c1, c2, err));
adamc@83 974 [])
adamc@403 975
adamc@403 976 fun checkPatCon (env, denv) p c1 c2 =
adamc@403 977 unifyCons (env, denv) c1 c2
adamc@403 978 handle CUnify (c1, c2, err) =>
adamc@403 979 (expError env (PatUnify (p, c1, c2, err));
adamc@86 980 [])
adamc@71 981
adamc@403 982 fun primType env p =
adamc@403 983 case p of
adamc@403 984 P.Int _ => !int
adamc@403 985 | P.Float _ => !float
adamc@403 986 | P.String _ => !string
adamc@403 987
adamc@403 988 fun recCons (k, nm, v, rest, loc) =
adamc@403 989 (L'.CConcat ((L'.CRecord (k, [(nm, v)]), loc),
adamc@403 990 rest), loc)
adamc@403 991
adamc@403 992 fun foldType (dom, loc) =
adamc@403 993 (L'.TCFun (L'.Explicit, "ran", (L'.KArrow ((L'.KRecord dom, loc), (L'.KType, loc)), loc),
adamc@403 994 (L'.TFun ((L'.TCFun (L'.Explicit, "nm", (L'.KName, loc),
adamc@403 995 (L'.TCFun (L'.Explicit, "v", dom,
adamc@403 996 (L'.TCFun (L'.Explicit, "rest", (L'.KRecord dom, loc),
adamc@403 997 (L'.TFun ((L'.CApp ((L'.CRel 3, loc), (L'.CRel 0, loc)), loc),
adamc@403 998 (L'.CDisjoint (L'.Instantiate,
adamc@403 999 (L'.CRecord
adamc@403 1000 ((L'.KUnit, loc),
adamc@403 1001 [((L'.CRel 2, loc),
adamc@403 1002 (L'.CUnit, loc))]), loc),
adamc@403 1003 (L'.CRel 0, loc),
adamc@403 1004 (L'.CApp ((L'.CRel 3, loc),
adamc@403 1005 recCons (dom,
adamc@403 1006 (L'.CRel 2, loc),
adamc@403 1007 (L'.CRel 1, loc),
adamc@403 1008 (L'.CRel 0, loc),
adamc@403 1009 loc)), loc)),
adamc@403 1010 loc)), loc)),
adamc@403 1011 loc)), loc)), loc),
adamc@403 1012 (L'.TFun ((L'.CApp ((L'.CRel 0, loc), (L'.CRecord (dom, []), loc)), loc),
adamc@403 1013 (L'.TCFun (L'.Explicit, "r", (L'.KRecord dom, loc),
adamc@403 1014 (L'.CApp ((L'.CRel 1, loc), (L'.CRel 0, loc)), loc)), loc)),
adamc@403 1015 loc)), loc)), loc)
adamc@403 1016
adamc@403 1017 datatype constraint =
adamc@403 1018 Disjoint of D.goal
adamc@403 1019 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1020
adamc@403 1021 val enD = map Disjoint
adamc@403 1022
adamc@403 1023 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1024 let
adamc@403 1025 fun unravel (t, e) =
adamc@403 1026 let
adamc@403 1027 val (t, gs) = hnormCon (env, denv) t
adamc@403 1028 in
adamc@403 1029 case t of
adamc@403 1030 (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@403 1031 let
adamc@403 1032 val u = cunif (loc, k)
adamc@403 1033
adamc@403 1034 val t'' = subConInCon (0, u) t'
adamc@403 1035 val (e, t, gs') = unravel (t'', (L'.ECApp (e, u), loc))
adamc@403 1036 in
adamc@403 1037 (*prefaces "Unravel" [("t'", p_con env t'),
adamc@403 1038 ("t''", p_con env t'')];*)
adamc@403 1039 (e, t, enD gs @ gs')
adamc@403 1040 end
adamc@403 1041 | (L'.TFun (dom as (L'.CApp (cl, _), _), ran), _) =>
adamc@403 1042 let
adamc@403 1043 val cl = #1 (hnormCon (env, denv) cl)
adamc@403 1044 in
adamc@403 1045 if infer <> L.TypesOnly andalso E.isClass env cl then
adamc@403 1046 let
adamc@403 1047 val r = ref NONE
adamc@403 1048 val (e, t, gs') = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@403 1049 in
adamc@403 1050 (e, t, TypeClass (env, dom, r, loc) :: enD gs @ gs')
adamc@403 1051 end
adamc@403 1052 else
adamc@403 1053 (e, t, enD gs)
adamc@403 1054 end
adamc@228 1055 | _ => (e, t, enD gs)
adamc@86 1056 end
adamc@15 1057 in
adamc@403 1058 case infer of
adamc@403 1059 L.DontInfer => (e, t, [])
adamc@403 1060 | _ => unravel (t, e)
adamc@15 1061 end
adamc@15 1062
adamc@174 1063 fun elabPat (pAll as (p, loc), (env, denv, bound)) =
adamc@171 1064 let
adamc@171 1065 val perror = (L'.PWild, loc)
adamc@171 1066 val terror = (L'.CError, loc)
adamc@171 1067 val pterror = (perror, terror)
adamc@171 1068 val rerror = (pterror, (env, bound))
adamc@171 1069
adamc@191 1070 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1071 case (po, to) of
adamc@188 1072 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1073 rerror)
adamc@188 1074 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1075 rerror)
adamc@191 1076 | (NONE, NONE) =>
adamc@191 1077 let
adamc@191 1078 val k = (L'.KType, loc)
adamc@191 1079 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1080 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1081 in
adamc@191 1082 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1083 (env, bound))
adamc@191 1084 end
adamc@188 1085 | (SOME p, SOME t) =>
adamc@188 1086 let
adamc@188 1087 val ((p', pt), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@191 1088
adamc@191 1089 val k = (L'.KType, loc)
adamc@191 1090 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1091 val nxs = length unifs - 1
adamc@194 1092 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1093 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1094 in
adamc@191 1095 ignore (checkPatCon (env, denv) p' pt t);
adamc@191 1096 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1097 (env, bound))
adamc@188 1098 end
adamc@171 1099 in
adamc@171 1100 case p of
adamc@171 1101 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1102 (env, bound))
adamc@171 1103 | L.PVar x =>
adamc@171 1104 let
adamc@171 1105 val t = if SS.member (bound, x) then
adamc@171 1106 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1107 terror)
adamc@171 1108 else
adamc@171 1109 cunif (loc, (L'.KType, loc))
adamc@171 1110 in
adamc@182 1111 (((L'.PVar (x, t), loc), t),
adamc@171 1112 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1113 end
adamc@173 1114 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1115 (env, bound))
adamc@171 1116 | L.PCon ([], x, po) =>
adamc@171 1117 (case E.lookupConstructor env x of
adamc@174 1118 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1119 rerror)
adamc@191 1120 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1121 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1122 (case E.lookupStr env m1 of
adamc@174 1123 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1124 rerror)
adamc@174 1125 | SOME (n, sgn) =>
adamc@174 1126 let
adamc@174 1127 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1128 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1129 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1130 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1131 ((L'.StrVar n, loc), sgn) ms
adamc@174 1132 in
adamc@174 1133 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1134 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1135 rerror)
adamc@191 1136 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1137 end)
adamc@174 1138
adamc@175 1139 | L.PRecord (xps, flex) =>
adamc@175 1140 let
adamc@175 1141 val (xpts, (env, bound, _)) =
adamc@175 1142 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1143 let
adamc@175 1144 val ((p', t), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@175 1145 in
adamc@175 1146 if SS.member (fbound, x) then
adamc@175 1147 expError env (DuplicatePatField (loc, x))
adamc@175 1148 else
adamc@175 1149 ();
adamc@175 1150 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1151 end)
adamc@175 1152 (env, bound, SS.empty) xps
adamc@175 1153
adamc@175 1154 val k = (L'.KType, loc)
adamc@175 1155 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1156 val c =
adamc@175 1157 if flex then
adamc@176 1158 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1159 else
adamc@176 1160 c
adamc@175 1161 in
adamc@182 1162 (((L'.PRecord xpts, loc),
adamc@175 1163 (L'.TRecord c, loc)),
adamc@175 1164 (env, bound))
adamc@175 1165 end
adamc@175 1166
adamc@171 1167 end
adamc@171 1168
adamc@172 1169 datatype coverage =
adamc@172 1170 Wild
adamc@173 1171 | None
adamc@172 1172 | Datatype of coverage IM.map
adamc@175 1173 | Record of coverage SM.map list
adamc@172 1174
adamc@243 1175 fun c2s c =
adamc@243 1176 case c of
adamc@243 1177 Wild => "Wild"
adamc@243 1178 | None => "None"
adamc@243 1179 | Datatype _ => "Datatype"
adamc@243 1180 | Record _ => "Record"
adamc@243 1181
adamc@172 1182 fun exhaustive (env, denv, t, ps) =
adamc@172 1183 let
adamc@402 1184 fun depth (p, _) =
adamc@402 1185 case p of
adamc@402 1186 L'.PWild => 0
adamc@402 1187 | L'.PVar _ => 0
adamc@402 1188 | L'.PPrim _ => 0
adamc@402 1189 | L'.PCon (_, _, _, NONE) => 1
adamc@402 1190 | L'.PCon (_, _, _, SOME p) => 1 + depth p
adamc@402 1191 | L'.PRecord xps => foldl (fn ((_, p, _), n) => Int.max (depth p, n)) 0 xps
adamc@402 1192
adamc@402 1193 val depth = 1 + foldl (fn (p, n) => Int.max (depth p, n)) 0 ps
adamc@402 1194
adamc@172 1195 fun pcCoverage pc =
adamc@172 1196 case pc of
adamc@172 1197 L'.PConVar n => n
adamc@174 1198 | L'.PConProj (m1, ms, x) =>
adamc@174 1199 let
adamc@174 1200 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1201 in
adamc@174 1202 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1203 NONE => raise Fail "exhaustive: Can't project constructor"
adamc@191 1204 | SOME (_, n, _, _, _) => n
adamc@174 1205 end
adamc@172 1206
adamc@172 1207 fun coverage (p, _) =
adamc@172 1208 case p of
adamc@172 1209 L'.PWild => Wild
adamc@172 1210 | L'.PVar _ => Wild
adamc@173 1211 | L'.PPrim _ => None
adamc@191 1212 | L'.PCon (_, pc, _, NONE) => Datatype (IM.insert (IM.empty, pcCoverage pc, Wild))
adamc@191 1213 | L'.PCon (_, pc, _, SOME p) => Datatype (IM.insert (IM.empty, pcCoverage pc, coverage p))
adamc@182 1214 | L'.PRecord xps => Record [foldl (fn ((x, p, _), fmap) =>
adamc@182 1215 SM.insert (fmap, x, coverage p)) SM.empty xps]
adamc@176 1216
adamc@172 1217 fun merge (c1, c2) =
adamc@172 1218 case (c1, c2) of
adamc@173 1219 (None, _) => c2
adamc@173 1220 | (_, None) => c1
adamc@173 1221
adamc@173 1222 | (Wild, _) => Wild
adamc@172 1223 | (_, Wild) => Wild
adamc@172 1224
adamc@172 1225 | (Datatype cm1, Datatype cm2) => Datatype (IM.unionWith merge (cm1, cm2))
adamc@172 1226
adamc@175 1227 | (Record fm1, Record fm2) => Record (fm1 @ fm2)
adamc@175 1228
adamc@175 1229 | _ => None
adamc@175 1230
adamc@172 1231 fun combinedCoverage ps =
adamc@172 1232 case ps of
adamc@172 1233 [] => raise Fail "Empty pattern list for coverage checking"
adamc@172 1234 | [p] => coverage p
adamc@172 1235 | p :: ps => merge (coverage p, combinedCoverage ps)
adamc@172 1236
adamc@402 1237 fun enumerateCases depth t =
adamc@402 1238 if depth = 0 then
adamc@402 1239 [Wild]
adamc@402 1240 else
adamc@402 1241 let
adamc@402 1242 fun dtype cons =
adamc@402 1243 ListUtil.mapConcat (fn (_, n, to) =>
adamc@402 1244 case to of
adamc@402 1245 NONE => [Datatype (IM.insert (IM.empty, n, Wild))]
adamc@402 1246 | SOME t => map (fn c => Datatype (IM.insert (IM.empty, n, c)))
adamc@402 1247 (enumerateCases (depth-1) t)) cons
adamc@402 1248 in
adamc@402 1249 case #1 (#1 (hnormCon (env, denv) t)) of
adamc@402 1250 L'.CNamed n =>
adamc@402 1251 (let
adamc@402 1252 val dt = E.lookupDatatype env n
adamc@402 1253 val cons = E.constructors dt
adamc@175 1254 in
adamc@402 1255 dtype cons
adamc@402 1256 end handle E.UnboundNamed _ => [Wild])
adamc@402 1257 | L'.TRecord c =>
adamc@402 1258 (case #1 (#1 (hnormCon (env, denv) c)) of
adamc@402 1259 L'.CRecord (_, xts) =>
adamc@402 1260 let
adamc@402 1261 val xts = map (fn (x, t) => (#1 (hnormCon (env, denv) x), t)) xts
adamc@402 1262
adamc@402 1263 fun exponentiate fs =
adamc@402 1264 case fs of
adamc@402 1265 [] => [SM.empty]
adamc@402 1266 | ((L'.CName x, _), t) :: rest =>
adamc@402 1267 let
adamc@402 1268 val this = enumerateCases depth t
adamc@402 1269 val rest = exponentiate rest
adamc@402 1270 in
adamc@402 1271 ListUtil.mapConcat (fn fmap =>
adamc@402 1272 map (fn c => SM.insert (fmap, x, c)) this) rest
adamc@402 1273 end
adamc@402 1274 | _ => raise Fail "exponentiate: Not CName"
adamc@402 1275 in
adamc@402 1276 if List.exists (fn ((L'.CName _, _), _) => false
adamc@402 1277 | (c, _) => true) xts then
adamc@402 1278 [Wild]
adamc@402 1279 else
adamc@402 1280 map (fn ls => Record [ls]) (exponentiate xts)
adamc@402 1281 end
adamc@402 1282 | _ => [Wild])
adamc@402 1283 | _ => [Wild]
adamc@402 1284 end
adamc@175 1285
adamc@175 1286 fun coverageImp (c1, c2) =
adamc@243 1287 let
adamc@243 1288 val r =
adamc@243 1289 case (c1, c2) of
adamc@243 1290 (Wild, _) => true
adamc@243 1291
adamc@243 1292 | (Datatype cmap1, Datatype cmap2) =>
adamc@243 1293 List.all (fn (n, c2) =>
adamc@243 1294 case IM.find (cmap1, n) of
adamc@243 1295 NONE => false
adamc@243 1296 | SOME c1 => coverageImp (c1, c2)) (IM.listItemsi cmap2)
adamc@243 1297 | (Datatype cmap1, Wild) =>
adamc@243 1298 List.all (fn (n, c1) => coverageImp (c1, Wild)) (IM.listItemsi cmap1)
adamc@243 1299
adamc@243 1300 | (Record fmaps1, Record fmaps2) =>
adamc@243 1301 List.all (fn fmap2 =>
adamc@243 1302 List.exists (fn fmap1 =>
adamc@243 1303 List.all (fn (x, c2) =>
adamc@243 1304 case SM.find (fmap1, x) of
adamc@243 1305 NONE => true
adamc@243 1306 | SOME c1 => coverageImp (c1, c2))
adamc@243 1307 (SM.listItemsi fmap2))
adamc@243 1308 fmaps1) fmaps2
adamc@243 1309
adamc@243 1310 | (Record fmaps1, Wild) =>
adamc@243 1311 List.exists (fn fmap1 =>
adamc@243 1312 List.all (fn (x, c1) => coverageImp (c1, Wild))
adamc@243 1313 (SM.listItemsi fmap1)) fmaps1
adamc@243 1314
adamc@243 1315 | _ => false
adamc@243 1316 in
adamc@243 1317 (*TextIO.print ("coverageImp(" ^ c2s c1 ^ ", " ^ c2s c2 ^ ") = " ^ Bool.toString r ^ "\n");*)
adamc@243 1318 r
adamc@243 1319 end
adamc@175 1320
adamc@172 1321 fun isTotal (c, t) =
adamc@172 1322 case c of
adamc@173 1323 None => (false, [])
adamc@173 1324 | Wild => (true, [])
adamc@172 1325 | Datatype cm =>
adamc@172 1326 let
adamc@172 1327 val ((t, _), gs) = hnormCon (env, denv) t
adamc@174 1328
adamc@174 1329 fun dtype cons =
adamc@174 1330 foldl (fn ((_, n, to), (total, gs)) =>
adamc@174 1331 case IM.find (cm, n) of
adamc@174 1332 NONE => (false, gs)
adamc@174 1333 | SOME c' =>
adamc@174 1334 case to of
adamc@174 1335 NONE => (total, gs)
adamc@174 1336 | SOME t' =>
adamc@174 1337 let
adamc@174 1338 val (total, gs') = isTotal (c', t')
adamc@174 1339 in
adamc@174 1340 (total, gs' @ gs)
adamc@174 1341 end)
adamc@174 1342 (true, gs) cons
adamc@191 1343
adamc@191 1344 fun unapp t =
adamc@191 1345 case t of
adamc@191 1346 L'.CApp ((t, _), _) => unapp t
adamc@191 1347 | _ => t
adamc@172 1348 in
adamc@191 1349 case unapp t of
adamc@172 1350 L'.CNamed n =>
adamc@172 1351 let
adamc@172 1352 val dt = E.lookupDatatype env n
adamc@172 1353 val cons = E.constructors dt
adamc@172 1354 in
adamc@174 1355 dtype cons
adamc@174 1356 end
adamc@174 1357 | L'.CModProj (m1, ms, x) =>
adamc@174 1358 let
adamc@174 1359 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1360 in
adamc@174 1361 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@174 1362 NONE => raise Fail "isTotal: Can't project datatype"
adamc@191 1363 | SOME (_, cons) => dtype cons
adamc@172 1364 end
adamc@172 1365 | L'.CError => (true, gs)
adamc@341 1366 | c =>
adamc@341 1367 (prefaces "Not a datatype" [("c", p_con env (c, ErrorMsg.dummySpan))];
adamc@341 1368 raise Fail "isTotal: Not a datatype")
adamc@172 1369 end
adamc@402 1370 | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases depth t), [])
adamc@172 1371 in
adamc@172 1372 isTotal (combinedCoverage ps, t)
adamc@172 1373 end
adamc@172 1374
adamc@217 1375 fun unmodCon env (c, loc) =
adamc@217 1376 case c of
adamc@217 1377 L'.CNamed n =>
adamc@217 1378 (case E.lookupCNamed env n of
adamc@217 1379 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1380 | _ => (c, loc))
adamc@217 1381 | L'.CModProj (m1, ms, x) =>
adamc@217 1382 let
adamc@217 1383 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1384 in
adamc@217 1385 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1386 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1387 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1388 | _ => (c, loc)
adamc@217 1389 end
adamc@217 1390 | _ => (c, loc)
adamc@217 1391
adamc@467 1392 fun normClassKey envs c =
adamc@467 1393 let
adamc@467 1394 val c = ElabOps.hnormCon envs c
adamc@467 1395 in
adamc@467 1396 case #1 c of
adamc@467 1397 L'.CApp (c1, c2) =>
adamc@467 1398 let
adamc@467 1399 val c1 = normClassKey envs c1
adamc@467 1400 val c2 = normClassKey envs c2
adamc@467 1401 in
adamc@467 1402 (L'.CApp (c1, c2), #2 c)
adamc@467 1403 end
adamc@467 1404 | _ => c
adamc@467 1405 end
adamc@467 1406
adamc@467 1407 fun normClassConstraint env (c, loc) =
adamc@217 1408 case c of
adamc@217 1409 L'.CApp (f, x) =>
adamc@217 1410 let
adamc@467 1411 val f = unmodCon env f
adamc@467 1412 val x = normClassKey env x
adamc@217 1413 in
adamc@467 1414 (L'.CApp (f, x), loc)
adamc@217 1415 end
adamc@467 1416 | L'.CUnif (_, _, _, ref (SOME c)) => normClassConstraint env c
adamc@467 1417 | _ => (c, loc)
adamc@216 1418
adamc@447 1419
adamc@447 1420 val makeInstantiable =
adamc@447 1421 let
adamc@447 1422 fun kind k = k
adamc@447 1423 fun con c =
adamc@447 1424 case c of
adamc@447 1425 L'.CDisjoint (L'.LeaveAlone, c1, c2, c) => L'.CDisjoint (L'.Instantiate, c1, c2, c)
adamc@447 1426 | _ => c
adamc@447 1427 in
adamc@447 1428 U.Con.map {kind = kind, con = con}
adamc@447 1429 end
adamc@447 1430
adamc@92 1431 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1432 let
adamc@280 1433 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@280 1434
adamc@280 1435 val r = case e of
adamc@91 1436 L.EAnnot (e, t) =>
adamc@91 1437 let
adamc@91 1438 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1439 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1440 val gs3 = checkCon (env, denv) e' et t'
adamc@91 1441 in
adamc@228 1442 (e', t', gs1 @ enD gs2 @ enD gs3)
adamc@91 1443 end
adamc@34 1444
adamc@91 1445 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1446 | L.EVar ([], s, infer) =>
adamc@91 1447 (case E.lookupE env s of
adamc@91 1448 E.NotBound =>
adamc@91 1449 (expError env (UnboundExp (loc, s));
adamc@91 1450 (eerror, cerror, []))
adamc@403 1451 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@403 1452 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1453 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1454 (case E.lookupStr env m1 of
adamc@91 1455 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1456 (eerror, cerror, []))
adamc@91 1457 | SOME (n, sgn) =>
adamc@91 1458 let
adamc@91 1459 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1460 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1461 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1462 (strerror, sgnerror))
adamc@91 1463 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1464 ((L'.StrVar n, loc), sgn) ms
adamc@10 1465
adamc@91 1466 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1467 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1468 cerror)
adamc@91 1469 | SOME t => t
adamc@91 1470 in
adamc@403 1471 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1472 end)
adamc@86 1473
adamc@349 1474 | L.EWild =>
adamc@210 1475 let
adamc@349 1476 val r = ref NONE
adamc@349 1477 val c = cunif (loc, (L'.KType, loc))
adamc@210 1478 in
adamc@349 1479 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1480 end
adamc@210 1481
adamc@91 1482 | L.EApp (e1, e2) =>
adamc@91 1483 let
adamc@91 1484 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@403 1485 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1486
adamc@91 1487 val dom = cunif (loc, ktype)
adamc@91 1488 val ran = cunif (loc, ktype)
adamc@91 1489 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1490
adamc@403 1491 val gs3 = checkCon (env, denv) e1' t1 t
adamc@403 1492 val gs4 = checkCon (env, denv) e2' t2 dom
adamc@403 1493
adamc@403 1494 val gs = gs1 @ gs2 @ enD gs3 @ enD gs4
adamc@91 1495 in
adamc@205 1496 ((L'.EApp (e1', e2'), loc), ran, gs)
adamc@91 1497 end
adamc@91 1498 | L.EAbs (x, to, e) =>
adamc@91 1499 let
adamc@91 1500 val (t', gs1) = case to of
adamc@91 1501 NONE => (cunif (loc, ktype), [])
adamc@91 1502 | SOME t =>
adamc@91 1503 let
adamc@91 1504 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1505 in
adamc@91 1506 checkKind env t' tk ktype;
adamc@91 1507 (t', gs)
adamc@91 1508 end
adamc@467 1509 val dom = normClassConstraint env t'
adamc@467 1510 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1511 in
adamc@91 1512 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1513 (L'.TFun (t', et), loc),
adamc@467 1514 enD gs1 @ gs2)
adamc@91 1515 end
adamc@91 1516 | L.ECApp (e, c) =>
adamc@91 1517 let
adamc@91 1518 val (e', et, gs1) = elabExp (env, denv) e
adamc@328 1519 val oldEt = et
adamc@403 1520 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 1521 val ((et', _), gs3) = hnormCon (env, denv) et
adamc@91 1522 in
adamc@91 1523 case et' of
adamc@91 1524 L'.CError => (eerror, cerror, [])
adamc@328 1525 | L'.TCFun (_, x, k, eb) =>
adamc@91 1526 let
adamc@91 1527 val () = checkKind env c' ck k
adamc@91 1528 val eb' = subConInCon (0, c') eb
adamc@339 1529 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1530 cerror)
adamc@91 1531 in
adamc@328 1532 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1533 ("et", p_con env oldEt),
adamc@328 1534 ("x", PD.string x),
adamc@328 1535 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1536 ("c", p_con env c'),
adamc@328 1537 ("eb'", p_con env eb')];*)
adamc@403 1538 ((L'.ECApp (e', c'), loc), eb', gs1 @ enD gs2 @ enD gs3)
adamc@91 1539 end
adamc@91 1540
adamc@91 1541 | _ =>
adamc@91 1542 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1543 (eerror, cerror, []))
adamc@91 1544 end
adamc@91 1545 | L.ECAbs (expl, x, k, e) =>
adamc@91 1546 let
adamc@91 1547 val expl' = elabExplicitness expl
adamc@91 1548 val k' = elabKind k
adamc@328 1549
adamc@328 1550 val env' = E.pushCRel env x k'
adamc@328 1551 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1552 in
adamc@91 1553 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1554 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1555 gs)
adamc@91 1556 end
adamc@91 1557
adamc@91 1558 | L.EDisjoint (c1, c2, e) =>
adamc@91 1559 let
adamc@91 1560 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1561 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1562
adamc@91 1563 val ku1 = kunif loc
adamc@91 1564 val ku2 = kunif loc
adamc@91 1565
adamc@91 1566 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@91 1567 val (e', t, gs4) = elabExp (env, denv') e
adamc@91 1568 in
adamc@91 1569 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1570 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1571
adamc@345 1572 (e', (L'.CDisjoint (L'.LeaveAlone, c1', c2', t), loc), enD gs1 @ enD gs2 @ enD gs3 @ gs4)
adamc@91 1573 end
adamc@91 1574
adamc@91 1575 | L.ERecord xes =>
adamc@91 1576 let
adamc@91 1577 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1578 let
adamc@91 1579 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1580 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1581 in
adamc@91 1582 checkKind env x' xk kname;
adamc@228 1583 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1584 end)
adamc@91 1585 [] xes
adamc@91 1586
adamc@91 1587 val k = (L'.KType, loc)
adamc@91 1588
adamc@91 1589 fun prove (xets, gs) =
adamc@91 1590 case xets of
adamc@91 1591 [] => gs
adamc@91 1592 | (x, _, t) :: rest =>
adamc@91 1593 let
adamc@91 1594 val xc = (x, t)
adamc@91 1595 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1596 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1597 let
adamc@91 1598 val xc' = (x', t')
adamc@91 1599 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1600 in
adamc@91 1601 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1602 end)
adamc@91 1603 gs rest
adamc@91 1604 in
adamc@91 1605 prove (rest, gs)
adamc@91 1606 end
adamc@228 1607
adamc@228 1608 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1609 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1610 in
adamc@255 1611 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1612 ((L'.ERecord xes', loc),
adamc@91 1613 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1614 enD (prove (xes', gsD)) @ gsO)
adamc@91 1615 end
adamc@91 1616
adamc@91 1617 | L.EField (e, c) =>
adamc@91 1618 let
adamc@91 1619 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1620 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1621
adamc@91 1622 val ft = cunif (loc, ktype)
adamc@91 1623 val rest = cunif (loc, ktype_record)
adamc@91 1624 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@91 1625
adamc@91 1626 val gs3 =
adamc@91 1627 checkCon (env, denv) e' et
adamc@91 1628 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@91 1629 val gs4 = D.prove env denv (first, rest, loc)
adamc@91 1630 in
adamc@228 1631 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@91 1632 end
adamc@91 1633
adamc@445 1634 | L.EConcat (e1, e2) =>
adamc@339 1635 let
adamc@339 1636 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 1637 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 1638
adamc@445 1639 val r1 = cunif (loc, ktype_record)
adamc@445 1640 val r2 = cunif (loc, ktype_record)
adamc@445 1641
adamc@445 1642 val gs3 = checkCon (env, denv) e1' e1t (L'.TRecord r1, loc)
adamc@445 1643 val gs4 = checkCon (env, denv) e2' e2t (L'.TRecord r2, loc)
adamc@445 1644 val gs5 = D.prove env denv (r1, r2, loc)
adamc@339 1645 in
adamc@445 1646 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 1647 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@445 1648 gs1 @ gs2 @ enD gs3 @ enD gs4 @ enD gs5)
adamc@339 1649 end
adamc@149 1650 | L.ECut (e, c) =>
adamc@149 1651 let
adamc@149 1652 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1653 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1654
adamc@149 1655 val ft = cunif (loc, ktype)
adamc@149 1656 val rest = cunif (loc, ktype_record)
adamc@149 1657 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@149 1658
adamc@149 1659 val gs3 =
adamc@149 1660 checkCon (env, denv) e' et
adamc@149 1661 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1662 val gs4 = D.prove env denv (first, rest, loc)
adamc@149 1663 in
adamc@228 1664 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@228 1665 gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@149 1666 end
adamc@149 1667
adamc@91 1668 | L.EFold =>
adamc@91 1669 let
adamc@91 1670 val dom = kunif loc
adamc@91 1671 in
adamc@91 1672 ((L'.EFold dom, loc), foldType (dom, loc), [])
adamc@91 1673 end
adamc@170 1674
adamc@171 1675 | L.ECase (e, pes) =>
adamc@171 1676 let
adamc@171 1677 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1678 val result = cunif (loc, (L'.KType, loc))
adamc@171 1679 val (pes', gs) = ListUtil.foldlMap
adamc@171 1680 (fn ((p, e), gs) =>
adamc@171 1681 let
adamc@174 1682 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
adamc@171 1683
adamc@171 1684 val gs1 = checkPatCon (env, denv) p' pt et
adamc@171 1685 val (e', et, gs2) = elabExp (env, denv) e
adamc@171 1686 val gs3 = checkCon (env, denv) e' et result
adamc@171 1687 in
adamc@228 1688 ((p', e'), enD gs1 @ gs2 @ enD gs3 @ gs)
adamc@171 1689 end)
adamc@171 1690 gs1 pes
adamc@172 1691
adamc@172 1692 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
adamc@171 1693 in
adamc@172 1694 if total then
adamc@172 1695 ()
adamc@172 1696 else
adamc@172 1697 expError env (Inexhaustive loc);
adamc@172 1698
adamc@228 1699 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, enD gs' @ gs)
adamc@171 1700 end
adamc@447 1701
adamc@447 1702 | L.ELet (eds, e) =>
adamc@447 1703 let
adamc@447 1704 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 1705 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 1706 in
adamc@447 1707 ((L'.ELet (eds, e), loc), t, gs1 @ gs2)
adamc@447 1708 end
adamc@280 1709 in
adamc@402 1710 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 1711 r
adamc@91 1712 end
adamc@31 1713
adamc@447 1714 and elabEdecl denv (dAll as (d, loc), (env, gs : constraint list)) =
adamc@447 1715 let
adamc@447 1716 val r =
adamc@447 1717 case d of
adamc@447 1718 L.EDVal (x, co, e) =>
adamc@447 1719 let
adamc@447 1720 val (c', _, gs1) = case co of
adamc@447 1721 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 1722 | SOME c => elabCon (env, denv) c
adamc@447 1723
adamc@447 1724 val (e', et, gs2) = elabExp (env, denv) e
adamc@447 1725 val gs3 = checkCon (env, denv) e' et c'
adamc@467 1726 val c' = normClassConstraint env c'
adamc@447 1727 val env' = E.pushERel env x c'
adamc@447 1728 val c' = makeInstantiable c'
adamc@447 1729 in
adamc@467 1730 ((L'.EDVal (x, c', e'), loc), (env', enD gs1 @ gs2 @ enD gs3 @ gs))
adamc@447 1731 end
adamc@447 1732 | L.EDValRec vis =>
adamc@447 1733 let
adamc@447 1734 fun allowable (e, _) =
adamc@447 1735 case e of
adamc@447 1736 L.EAbs _ => true
adamc@447 1737 | L.ECAbs (_, _, _, e) => allowable e
adamc@447 1738 | L.EDisjoint (_, _, e) => allowable e
adamc@447 1739 | _ => false
adamc@447 1740
adamc@447 1741 val (vis, gs) = ListUtil.foldlMap
adamc@447 1742 (fn ((x, co, e), gs) =>
adamc@447 1743 let
adamc@447 1744 val (c', _, gs1) = case co of
adamc@447 1745 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 1746 | SOME c => elabCon (env, denv) c
adamc@447 1747 in
adamc@447 1748 ((x, c', e), enD gs1 @ gs)
adamc@447 1749 end) gs vis
adamc@447 1750
adamc@447 1751 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 1752
adamc@447 1753 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 1754 let
adamc@447 1755 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 1756
adamc@447 1757 val gs2 = checkCon (env, denv) e' et c'
adamc@447 1758
adamc@447 1759 val c' = makeInstantiable c'
adamc@447 1760 in
adamc@447 1761 if allowable e then
adamc@447 1762 ()
adamc@447 1763 else
adamc@447 1764 expError env (IllegalRec (x, e'));
adamc@447 1765 ((x, c', e'), gs1 @ enD gs2 @ gs)
adamc@447 1766 end) gs vis
adamc@447 1767 in
adamc@447 1768 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 1769 end
adamc@447 1770 in
adamc@447 1771 r
adamc@447 1772 end
adamc@447 1773
adamc@42 1774 val hnormSgn = E.hnormSgn
adamc@31 1775
adamc@210 1776 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 1777 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@459 1778 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@205 1779
adamc@469 1780 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 1781 case E.lookupStr env str of
adamc@469 1782 NONE => (strError env (UnboundStr (loc, str));
adamc@469 1783 denv)
adamc@469 1784 | SOME (n, sgn) =>
adamc@469 1785 let
adamc@469 1786 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 1787 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 1788 NONE => (strError env (UnboundStr (loc, m));
adamc@469 1789 (strerror, sgnerror))
adamc@469 1790 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 1791 ((L'.StrVar n, loc), sgn) strs
adamc@469 1792
adamc@469 1793 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@469 1794
adamc@469 1795 val denv = case cso of
adamc@469 1796 NONE => (strError env (UnboundStr (loc, str));
adamc@469 1797 denv)
adamc@469 1798 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@469 1799 let
adamc@469 1800 val (denv, gs) = D.assert env denv (c1, c2)
adamc@469 1801 in
adamc@469 1802 case gs of
adamc@469 1803 [] => ()
adamc@469 1804 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
adamc@469 1805
adamc@469 1806 denv
adamc@469 1807 end) denv cs
adamc@469 1808 in
adamc@469 1809 denv
adamc@469 1810 end
adamc@469 1811
adamc@88 1812 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1813 case sgi of
adamc@76 1814 L.SgiConAbs (x, k) =>
adamc@76 1815 let
adamc@76 1816 val k' = elabKind k
adamc@31 1817
adamc@76 1818 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1819 in
adamc@88 1820 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1821 end
adamc@31 1822
adamc@76 1823 | L.SgiCon (x, ko, c) =>
adamc@76 1824 let
adamc@76 1825 val k' = case ko of
adamc@76 1826 NONE => kunif loc
adamc@76 1827 | SOME k => elabKind k
adamc@31 1828
adamc@83 1829 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1830 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1831 in
adamc@76 1832 checkKind env c' ck k';
adamc@31 1833
adamc@88 1834 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1835 end
adamc@31 1836
adamc@191 1837 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1838 let
adamc@157 1839 val k = (L'.KType, loc)
adamc@191 1840 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1841 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1842 val t = (L'.CNamed n, loc)
adamc@194 1843 val nxs = length xs - 1
adamc@194 1844 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1845
adamc@284 1846 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@284 1847 (E.pushCRel env' x k,
adamc@284 1848 D.enter denv')) (env, denv) xs
adamc@284 1849
adamc@157 1850 val (xcs, (used, env, gs)) =
adamc@157 1851 ListUtil.foldlMap
adamc@157 1852 (fn ((x, to), (used, env, gs)) =>
adamc@157 1853 let
adamc@157 1854 val (to, t, gs') = case to of
adamc@157 1855 NONE => (NONE, t, gs)
adamc@157 1856 | SOME t' =>
adamc@157 1857 let
adamc@284 1858 val (t', tk, gs') = elabCon (env', denv') t'
adamc@157 1859 in
adamc@284 1860 checkKind env' t' tk k;
adamc@157 1861 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1862 end
adamc@191 1863 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1864
adamc@157 1865 val (env, n') = E.pushENamed env x t
adamc@157 1866 in
adamc@157 1867 if SS.member (used, x) then
adamc@157 1868 strError env (DuplicateConstructor (x, loc))
adamc@157 1869 else
adamc@157 1870 ();
adamc@157 1871 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1872 end)
adamc@157 1873 (SS.empty, env, []) xcs
adamc@191 1874
adamc@191 1875 val env = E.pushDatatype env n xs xcs
adamc@157 1876 in
adamc@191 1877 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1878 end
adamc@156 1879
adamc@158 1880 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1881
adamc@158 1882 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1883 (case E.lookupStr env m1 of
adamc@158 1884 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1885 ([], (env, denv, gs)))
adamc@158 1886 | SOME (n, sgn) =>
adamc@158 1887 let
adamc@158 1888 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1889 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1890 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1891 (strerror, sgnerror))
adamc@158 1892 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1893 ((L'.StrVar n, loc), sgn) ms
adamc@158 1894 in
adamc@161 1895 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@161 1896 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@161 1897 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1898 NONE => (conError env (UnboundDatatype (loc, s));
adamc@161 1899 ([], (env, denv, gs)))
adamc@191 1900 | SOME (xs, xncs) =>
adamc@161 1901 let
adamc@161 1902 val k = (L'.KType, loc)
adamc@191 1903 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1904
adamc@161 1905 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1906 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1907 val env = E.pushDatatype env n' xs xncs
adamc@158 1908
adamc@161 1909 val t = (L'.CNamed n', loc)
adamc@161 1910 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1911 let
adamc@161 1912 val t = case to of
adamc@161 1913 NONE => t
adamc@161 1914 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1915
adamc@191 1916 val t = foldr (fn (x, t) =>
adamc@191 1917 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1918 t xs
adamc@161 1919 in
adamc@161 1920 E.pushENamedAs env x n t
adamc@161 1921 end) env xncs
adamc@161 1922 in
adamc@191 1923 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@161 1924 end)
adamc@161 1925 | _ => (strError env (NotDatatype loc);
adamc@161 1926 ([], (env, denv, [])))
adamc@158 1927 end)
adamc@156 1928
adamc@76 1929 | L.SgiVal (x, c) =>
adamc@76 1930 let
adamc@83 1931 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 1932
adamc@76 1933 val (env', n) = E.pushENamed env x c'
adamc@467 1934 val c' = normClassConstraint env c'
adamc@76 1935 in
adamc@76 1936 (unifyKinds ck ktype
adamc@76 1937 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 1938
adamc@467 1939 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 1940 end
adamc@31 1941
adamc@76 1942 | L.SgiStr (x, sgn) =>
adamc@76 1943 let
adamc@83 1944 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1945 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 1946 in
adamc@88 1947 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1948 end
adamc@31 1949
adamc@76 1950 | L.SgiSgn (x, sgn) =>
adamc@76 1951 let
adamc@83 1952 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1953 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 1954 in
adamc@88 1955 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1956 end
adamc@31 1957
adamc@76 1958 | L.SgiInclude sgn =>
adamc@76 1959 let
adamc@83 1960 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1961 in
adamc@76 1962 case #1 (hnormSgn env sgn') of
adamc@76 1963 L'.SgnConst sgis =>
adamc@88 1964 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 1965 | _ => (sgnError env (NotIncludable sgn');
adamc@88 1966 ([], (env, denv, [])))
adamc@88 1967 end
adamc@88 1968
adamc@88 1969 | L.SgiConstraint (c1, c2) =>
adamc@88 1970 let
adamc@88 1971 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 1972 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 1973
adamc@90 1974 val (denv, gs3) = D.assert env denv (c1', c2')
adamc@88 1975 in
adamc@88 1976 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 1977 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 1978
adamc@90 1979 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
adamc@76 1980 end
adamc@31 1981
adamc@211 1982 | L.SgiClassAbs x =>
adamc@211 1983 let
adamc@211 1984 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1985 val (env, n) = E.pushCNamed env x k NONE
adamc@211 1986 val env = E.pushClass env n
adamc@211 1987 in
adamc@211 1988 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
adamc@211 1989 end
adamc@211 1990
adamc@211 1991 | L.SgiClass (x, c) =>
adamc@211 1992 let
adamc@211 1993 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1994 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 1995 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 1996 val env = E.pushClass env n
adamc@211 1997 in
adamc@211 1998 checkKind env c' ck k;
adamc@211 1999 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
adamc@211 2000 end
adamc@211 2001
adamc@83 2002 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2003 case sgn of
adamc@31 2004 L.SgnConst sgis =>
adamc@31 2005 let
adamc@88 2006 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2007
adamc@62 2008 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2009 case sgi of
adamc@62 2010 L'.SgiConAbs (x, _, _) =>
adamc@62 2011 (if SS.member (cons, x) then
adamc@62 2012 sgnError env (DuplicateCon (loc, x))
adamc@62 2013 else
adamc@62 2014 ();
adamc@62 2015 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2016 | L'.SgiCon (x, _, _, _) =>
adamc@62 2017 (if SS.member (cons, x) then
adamc@62 2018 sgnError env (DuplicateCon (loc, x))
adamc@62 2019 else
adamc@62 2020 ();
adamc@62 2021 (SS.add (cons, x), vals, sgns, strs))
adamc@191 2022 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 2023 let
adamc@156 2024 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 2025 (if SS.member (vals, x) then
adamc@156 2026 sgnError env (DuplicateVal (loc, x))
adamc@156 2027 else
adamc@156 2028 ();
adamc@156 2029 SS.add (vals, x)))
adamc@156 2030 vals xncs
adamc@156 2031 in
adamc@156 2032 if SS.member (cons, x) then
adamc@156 2033 sgnError env (DuplicateCon (loc, x))
adamc@156 2034 else
adamc@156 2035 ();
adamc@156 2036 (SS.add (cons, x), vals, sgns, strs)
adamc@156 2037 end
adamc@191 2038 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2039 (if SS.member (cons, x) then
adamc@156 2040 sgnError env (DuplicateCon (loc, x))
adamc@156 2041 else
adamc@156 2042 ();
adamc@156 2043 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2044 | L'.SgiVal (x, _, _) =>
adamc@62 2045 (if SS.member (vals, x) then
adamc@62 2046 sgnError env (DuplicateVal (loc, x))
adamc@62 2047 else
adamc@62 2048 ();
adamc@62 2049 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2050 | L'.SgiSgn (x, _, _) =>
adamc@62 2051 (if SS.member (sgns, x) then
adamc@62 2052 sgnError env (DuplicateSgn (loc, x))
adamc@62 2053 else
adamc@62 2054 ();
adamc@62 2055 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2056 | L'.SgiStr (x, _, _) =>
adamc@62 2057 (if SS.member (strs, x) then
adamc@62 2058 sgnError env (DuplicateStr (loc, x))
adamc@62 2059 else
adamc@62 2060 ();
adamc@88 2061 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2062 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@211 2063 | L'.SgiClassAbs (x, _) =>
adamc@211 2064 (if SS.member (cons, x) then
adamc@211 2065 sgnError env (DuplicateCon (loc, x))
adamc@211 2066 else
adamc@211 2067 ();
adamc@211 2068 (SS.add (cons, x), vals, sgns, strs))
adamc@211 2069 | L'.SgiClass (x, _, _) =>
adamc@211 2070 (if SS.member (cons, x) then
adamc@211 2071 sgnError env (DuplicateCon (loc, x))
adamc@211 2072 else
adamc@211 2073 ();
adamc@460 2074 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2075 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2076 in
adamc@83 2077 ((L'.SgnConst sgis', loc), gs)
adamc@31 2078 end
adamc@31 2079 | L.SgnVar x =>
adamc@31 2080 (case E.lookupSgn env x of
adamc@31 2081 NONE =>
adamc@31 2082 (sgnError env (UnboundSgn (loc, x));
adamc@83 2083 ((L'.SgnError, loc), []))
adamc@83 2084 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2085 | L.SgnFun (m, dom, ran) =>
adamc@41 2086 let
adamc@83 2087 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2088 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2089 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2090 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2091 in
adamc@83 2092 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2093 end
adamc@42 2094 | L.SgnWhere (sgn, x, c) =>
adamc@42 2095 let
adamc@83 2096 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2097 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2098 in
adamc@42 2099 case #1 (hnormSgn env sgn') of
adamc@83 2100 L'.SgnError => (sgnerror, [])
adamc@42 2101 | L'.SgnConst sgis =>
adamc@75 2102 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2103 x' = x andalso
adamc@75 2104 (unifyKinds k ck
adamc@75 2105 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2106 true)
adamc@42 2107 | _ => false) sgis then
adamc@83 2108 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2109 else
adamc@42 2110 (sgnError env (UnWhereable (sgn', x));
adamc@83 2111 (sgnerror, []))
adamc@42 2112 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2113 (sgnerror, []))
adamc@42 2114 end
adamc@59 2115 | L.SgnProj (m, ms, x) =>
adamc@59 2116 (case E.lookupStr env m of
adamc@59 2117 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2118 (sgnerror, []))
adamc@59 2119 | SOME (n, sgn) =>
adamc@59 2120 let
adamc@59 2121 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2122 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2123 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2124 (strerror, sgnerror))
adamc@59 2125 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2126 ((L'.StrVar n, loc), sgn) ms
adamc@59 2127 in
adamc@59 2128 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2129 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2130 (sgnerror, []))
adamc@83 2131 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2132 end)
adamc@59 2133
adamc@31 2134
adamc@66 2135 fun selfify env {str, strs, sgn} =
adamc@66 2136 case #1 (hnormSgn env sgn) of
adamc@66 2137 L'.SgnError => sgn
adamc@66 2138 | L'.SgnVar _ => sgn
adamc@66 2139
adamc@66 2140 | L'.SgnConst sgis =>
adamc@66 2141 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2142 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2143 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2144 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@218 2145 | (L'.SgiClassAbs (x, n), loc) =>
adamc@218 2146 (L'.SgiClass (x, n, (L'.CModProj (str, strs, x), loc)), loc)
adamc@66 2147 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2148 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2149 | x => x) sgis), #2 sgn)
adamc@66 2150 | L'.SgnFun _ => sgn
adamc@66 2151 | L'.SgnWhere _ => sgn
adamc@66 2152 | L'.SgnProj (m, ms, x) =>
adamc@66 2153 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2154 (L'.StrVar m, #2 sgn) ms,
adamc@66 2155 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2156 field = x} of
adamc@66 2157 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2158 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2159
adamc@66 2160 fun selfifyAt env {str, sgn} =
adamc@66 2161 let
adamc@66 2162 fun self (str, _) =
adamc@66 2163 case str of
adamc@66 2164 L'.StrVar x => SOME (x, [])
adamc@66 2165 | L'.StrProj (str, x) =>
adamc@66 2166 (case self str of
adamc@66 2167 NONE => NONE
adamc@66 2168 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2169 | _ => NONE
adamc@66 2170 in
adamc@66 2171 case self str of
adamc@66 2172 NONE => sgn
adamc@66 2173 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2174 end
adamc@66 2175
adamc@88 2176 fun dopen (env, denv) {str, strs, sgn} =
adamc@66 2177 let
adamc@66 2178 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2179 (L'.StrVar str, #2 sgn) strs
adamc@66 2180 in
adamc@66 2181 case #1 (hnormSgn env sgn) of
adamc@66 2182 L'.SgnConst sgis =>
adamc@88 2183 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
adamc@162 2184 let
adamc@162 2185 val d =
adamc@162 2186 case sgi of
adamc@162 2187 L'.SgiConAbs (x, n, k) =>
adamc@162 2188 let
adamc@162 2189 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2190 in
adamc@162 2191 (L'.DCon (x, n, k, c), loc)
adamc@162 2192 end
adamc@162 2193 | L'.SgiCon (x, n, k, c) =>
adamc@162 2194 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2195 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2196 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2197 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2198 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2199 | L'.SgiVal (x, n, t) =>
adamc@162 2200 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2201 | L'.SgiStr (x, n, sgn) =>
adamc@162 2202 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2203 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2204 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2205 | L'.SgiConstraint (c1, c2) =>
adamc@162 2206 (L'.DConstraint (c1, c2), loc)
adamc@211 2207 | L'.SgiClassAbs (x, n) =>
adamc@211 2208 let
adamc@211 2209 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2210 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2211 in
adamc@211 2212 (L'.DCon (x, n, k, c), loc)
adamc@211 2213 end
adamc@211 2214 | L'.SgiClass (x, n, _) =>
adamc@211 2215 let
adamc@211 2216 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2217 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2218 in
adamc@211 2219 (L'.DCon (x, n, k, c), loc)
adamc@211 2220 end
adamc@162 2221 in
adamc@162 2222 (d, (E.declBinds env' d, denv'))
adamc@162 2223 end)
adamc@88 2224 (env, denv) sgis
adamc@66 2225 | _ => (strError env (UnOpenable sgn);
adamc@88 2226 ([], (env, denv)))
adamc@66 2227 end
adamc@66 2228
adamc@31 2229 fun sgiOfDecl (d, loc) =
adamc@31 2230 case d of
adamc@123 2231 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2232 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2233 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2234 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2235 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2236 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2237 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2238 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2239 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2240 | L'.DExport _ => []
adamc@460 2241 | L'.DTable (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (tableOf (), c), loc)), loc)]
adamc@460 2242 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@213 2243 | L'.DClass (x, n, c) => [(L'.SgiClass (x, n, c), loc)]
adamc@271 2244 | L'.DDatabase _ => []
adamc@460 2245 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@88 2246
adamc@88 2247 fun sgiBindsD (env, denv) (sgi, _) =
adamc@88 2248 case sgi of
adamc@90 2249 L'.SgiConstraint (c1, c2) =>
adamc@90 2250 (case D.assert env denv (c1, c2) of
adamc@90 2251 (denv, []) => denv
adamc@90 2252 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
adamc@88 2253 | _ => denv
adamc@31 2254
adamc@86 2255 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
adamc@469 2256 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2257 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2258 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2259 (L'.SgnError, _) => ()
adamc@31 2260 | (_, L'.SgnError) => ()
adamc@31 2261
adamc@31 2262 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2263 let
adamc@362 2264 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2265 ("sgn2", p_sgn env sgn2),
adamc@362 2266 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2267 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2268
adamc@156 2269 fun folder (sgi2All as (sgi, loc), (env, denv)) =
adamc@31 2270 let
adamc@362 2271 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2272
adamc@31 2273 fun seek p =
adamc@31 2274 let
adamc@88 2275 fun seek (env, denv) ls =
adamc@31 2276 case ls of
adamc@31 2277 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@88 2278 (env, denv))
adamc@31 2279 | h :: t =>
adamc@469 2280 case p (env, h) of
adamc@469 2281 NONE =>
adamc@469 2282 let
adamc@469 2283 val env = case #1 h of
adamc@469 2284 L'.SgiCon (x, n, k, c) =>
adamc@471 2285 if E.checkENamed env n then
adamc@471 2286 env
adamc@471 2287 else
adamc@471 2288 E.pushCNamedAs env x n k (SOME c)
adamc@469 2289 | L'.SgiConAbs (x, n, k) =>
adamc@471 2290 if E.checkENamed env n then
adamc@471 2291 env
adamc@471 2292 else
adamc@471 2293 E.pushCNamedAs env x n k NONE
adamc@469 2294 | _ => env
adamc@469 2295 in
adamc@469 2296 seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
adamc@469 2297 end
adamc@88 2298 | SOME envs => envs
adamc@31 2299 in
adamc@88 2300 seek (env, denv) sgis1
adamc@31 2301 end
adamc@31 2302 in
adamc@31 2303 case sgi of
adamc@31 2304 L'.SgiConAbs (x, n2, k2) =>
adamc@469 2305 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31 2306 let
adamc@41 2307 fun found (x', n1, k1, co1) =
adamc@41 2308 if x = x' then
adamc@41 2309 let
adamc@41 2310 val () = unifyKinds k1 k2
adamc@41 2311 handle KUnify (k1, k2, err) =>
adamc@41 2312 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2313 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2314 in
adamc@41 2315 SOME (if n1 = n2 then
adamc@41 2316 env
adamc@41 2317 else
adamc@88 2318 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
adamc@88 2319 denv)
adamc@41 2320 end
adamc@41 2321 else
adamc@41 2322 NONE
adamc@31 2323 in
adamc@31 2324 case sgi1 of
adamc@41 2325 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2326 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2327 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2328 let
adamc@191 2329 val k = (L'.KType, loc)
adamc@191 2330 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2331 in
adamc@191 2332 found (x', n1, k', NONE)
adamc@191 2333 end
adamc@191 2334 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2335 let
adamc@191 2336 val k = (L'.KType, loc)
adamc@191 2337 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2338 in
adamc@191 2339 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2340 end
adamc@211 2341 | L'.SgiClassAbs (x', n1) => found (x', n1,
adamc@218 2342 (L'.KArrow ((L'.KType, loc),
adamc@218 2343 (L'.KType, loc)), loc),
adamc@218 2344 NONE)
adamc@211 2345 | L'.SgiClass (x', n1, c) => found (x', n1,
adamc@211 2346 (L'.KArrow ((L'.KType, loc),
adamc@211 2347 (L'.KType, loc)), loc),
adamc@211 2348 SOME c)
adamc@31 2349 | _ => NONE
adamc@31 2350 end)
adamc@31 2351
adamc@31 2352 | L'.SgiCon (x, n2, k2, c2) =>
adamc@469 2353 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2354 let
adamc@211 2355 fun found (x', n1, k1, c1) =
adamc@211 2356 if x = x' then
adamc@211 2357 let
adamc@327 2358 fun good () =
adamc@327 2359 let
adamc@327 2360 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2361 val env = if n1 = n2 then
adamc@327 2362 env
adamc@327 2363 else
adamc@327 2364 E.pushCNamedAs env x n1 k1 (SOME c1)
adamc@327 2365 in
adamc@327 2366 SOME (env, denv)
adamc@327 2367 end
adamc@211 2368 in
adamc@211 2369 (case unifyCons (env, denv) c1 c2 of
adamc@211 2370 [] => good ()
adamc@211 2371 | _ => NONE)
adamc@211 2372 handle CUnify (c1, c2, err) =>
adamc@211 2373 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2374 good ())
adamc@211 2375 end
adamc@211 2376 else
adamc@211 2377 NONE
adamc@211 2378 in
adamc@211 2379 case sgi1 of
adamc@211 2380 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2381 | L'.SgiClass (x', n1, c1) =>
adamc@211 2382 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
adamc@211 2383 | _ => NONE
adamc@211 2384 end)
adamc@31 2385
adamc@191 2386 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@469 2387 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@160 2388 let
adamc@191 2389 fun found (n1, xs1, xncs1) =
adamc@160 2390 let
adamc@160 2391 fun mismatched ue =
adamc@160 2392 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@160 2393 SOME (env, denv))
adamc@156 2394
adamc@191 2395 val k = (L'.KType, loc)
adamc@191 2396 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2397
adamc@160 2398 fun good () =
adamc@160 2399 let
adamc@471 2400 val env = E.sgiBinds env sgi1All
adamc@160 2401 val env = if n1 = n2 then
adamc@160 2402 env
adamc@160 2403 else
adamc@471 2404 E.pushCNamedAs env x n2 k'
adamc@471 2405 (SOME (L'.CNamed n1, loc))
adamc@160 2406 in
adamc@160 2407 SOME (env, denv)
adamc@160 2408 end
adamc@156 2409
adamc@397 2410 val env = E.pushCNamedAs env x n1 k' NONE
adamc@397 2411 val env = if n1 = n2 then
adamc@397 2412 env
adamc@397 2413 else
adamc@397 2414 E.pushCNamedAs env x n2 k' (SOME (L'.CNamed n1, loc))
adamc@191 2415 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2416 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2417 String.compare (x1, x2) <> EQUAL
adamc@160 2418 orelse case (t1, t2) of
adamc@160 2419 (NONE, NONE) => false
adamc@160 2420 | (SOME t1, SOME t2) =>
adamc@160 2421 not (List.null (unifyCons (env, denv) t1 t2))
adamc@160 2422 | _ => true
adamc@160 2423 in
adamc@191 2424 (if xs1 <> xs2
adamc@191 2425 orelse length xncs1 <> length xncs2
adamc@160 2426 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2427 mismatched NONE
adamc@160 2428 else
adamc@160 2429 good ())
adamc@160 2430 handle CUnify ue => mismatched (SOME ue)
adamc@160 2431 end
adamc@160 2432 in
adamc@160 2433 case sgi1 of
adamc@191 2434 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2435 if x' = x then
adamc@191 2436 found (n1, xs, xncs1)
adamc@160 2437 else
adamc@160 2438 NONE
adamc@191 2439 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2440 if x' = x then
adamc@191 2441 found (n1, xs, xncs1)
adamc@162 2442 else
adamc@162 2443 NONE
adamc@160 2444 | _ => NONE
adamc@160 2445 end)
adamc@156 2446
adamc@191 2447 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469 2448 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158 2449 case sgi1 of
adamc@191 2450 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2451 if x = x' then
adamc@158 2452 let
adamc@158 2453 val k = (L'.KType, loc)
adamc@191 2454 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2455 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2456 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2457
adamc@158 2458 fun good () =
adamc@158 2459 let
adamc@191 2460 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2461 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2462 in
adamc@158 2463 SOME (env, denv)
adamc@158 2464 end
adamc@158 2465 in
adamc@158 2466 (case unifyCons (env, denv) t1 t2 of
adamc@158 2467 [] => good ()
adamc@158 2468 | _ => NONE)
adamc@158 2469 handle CUnify (c1, c2, err) =>
adamc@158 2470 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2471 good ())
adamc@158 2472 end
adamc@158 2473 else
adamc@158 2474 NONE
adamc@158 2475
adamc@158 2476 | _ => NONE)
adamc@156 2477
adamc@32 2478 | L'.SgiVal (x, n2, c2) =>
adamc@469 2479 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32 2480 case sgi1 of
adamc@41 2481 L'.SgiVal (x', n1, c1) =>
adamc@41 2482 if x = x' then
adamc@362 2483 ((*prefaces "Pre" [("c1", p_con env c1),
adamc@362 2484 ("c2", p_con env c2)];*)
adamc@362 2485 case unifyCons (env, denv) c1 c2 of
adamc@88 2486 [] => SOME (env, denv)
adamc@86 2487 | _ => NONE)
adamc@86 2488 handle CUnify (c1, c2, err) =>
adamc@86 2489 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@88 2490 SOME (env, denv))
adamc@41 2491 else
adamc@41 2492 NONE
adamc@32 2493 | _ => NONE)
adamc@32 2494
adamc@33 2495 | L'.SgiStr (x, n2, sgn2) =>
adamc@469 2496 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33 2497 case sgi1 of
adamc@41 2498 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2499 if x = x' then
adamc@66 2500 let
adamc@86 2501 val () = subSgn (env, denv) sgn1 sgn2
adamc@66 2502 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2503 val env = if n1 = n2 then
adamc@66 2504 env
adamc@66 2505 else
adamc@66 2506 E.pushStrNamedAs env x n2
adamc@66 2507 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2508 sgn = sgn2})
adamc@66 2509 in
adamc@88 2510 SOME (env, denv)
adamc@66 2511 end
adamc@41 2512 else
adamc@41 2513 NONE
adamc@33 2514 | _ => NONE)
adamc@59 2515
adamc@59 2516 | L'.SgiSgn (x, n2, sgn2) =>
adamc@469 2517 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59 2518 case sgi1 of
adamc@59 2519 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2520 if x = x' then
adamc@65 2521 let
adamc@86 2522 val () = subSgn (env, denv) sgn1 sgn2
adamc@86 2523 val () = subSgn (env, denv) sgn2 sgn1
adamc@65 2524
adamc@65 2525 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2526 val env = if n1 = n2 then
adamc@65 2527 env
adamc@65 2528 else
adamc@65 2529 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2530 in
adamc@88 2531 SOME (env, denv)
adamc@65 2532 end
adamc@59 2533 else
adamc@59 2534 NONE
adamc@59 2535 | _ => NONE)
adamc@88 2536
adamc@88 2537 | L'.SgiConstraint (c2, d2) =>
adamc@469 2538 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88 2539 case sgi1 of
adamc@88 2540 L'.SgiConstraint (c1, d1) =>
adamc@88 2541 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
adamc@90 2542 let
adamc@90 2543 val (denv, gs) = D.assert env denv (c2, d2)
adamc@90 2544 in
adamc@90 2545 case gs of
adamc@90 2546 [] => ()
adamc@90 2547 | _ => raise Fail "subSgn: Sub-constraints remain";
adamc@90 2548
adamc@90 2549 SOME (env, denv)
adamc@90 2550 end
adamc@88 2551 else
adamc@88 2552 NONE
adamc@88 2553 | _ => NONE)
adamc@203 2554
adamc@211 2555 | L'.SgiClassAbs (x, n2) =>
adamc@469 2556 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2557 let
adamc@211 2558 fun found (x', n1, co) =
adamc@211 2559 if x = x' then
adamc@211 2560 let
adamc@211 2561 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2562 val env = E.pushCNamedAs env x n1 k co
adamc@211 2563 in
adamc@211 2564 SOME (if n1 = n2 then
adamc@211 2565 env
adamc@211 2566 else
adamc@211 2567 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
adamc@211 2568 denv)
adamc@211 2569 end
adamc@211 2570 else
adamc@211 2571 NONE
adamc@211 2572 in
adamc@211 2573 case sgi1 of
adamc@211 2574 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
adamc@211 2575 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
adamc@211 2576 | _ => NONE
adamc@211 2577 end)
adamc@211 2578 | L'.SgiClass (x, n2, c2) =>
adamc@469 2579 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2580 let
adamc@211 2581 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2582
adamc@211 2583 fun found (x', n1, c1) =
adamc@211 2584 if x = x' then
adamc@211 2585 let
adamc@218 2586 fun good () =
adamc@218 2587 let
adamc@218 2588 val env = E.pushCNamedAs env x n2 k (SOME c2)
adamc@218 2589 val env = if n1 = n2 then
adamc@218 2590 env
adamc@218 2591 else
adamc@218 2592 E.pushCNamedAs env x n1 k (SOME c1)
adamc@218 2593 in
adamc@218 2594 SOME (env, denv)
adamc@218 2595 end
adamc@211 2596 in
adamc@211 2597 (case unifyCons (env, denv) c1 c2 of
adamc@211 2598 [] => good ()
adamc@211 2599 | _ => NONE)
adamc@211 2600 handle CUnify (c1, c2, err) =>
adamc@211 2601 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2602 good ())
adamc@211 2603 end
adamc@211 2604 else
adamc@211 2605 NONE
adamc@211 2606 in
adamc@211 2607 case sgi1 of
adamc@211 2608 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
adamc@211 2609 | _ => NONE
adamc@211 2610 end)
adamc@31 2611 end
adamc@31 2612 in
adamc@88 2613 ignore (foldl folder (env, denv) sgis2)
adamc@31 2614 end
adamc@31 2615
adamc@41 2616 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2617 let
adamc@43 2618 val ran1 =
adamc@43 2619 if n1 = n2 then
adamc@43 2620 ran1
adamc@43 2621 else
adamc@43 2622 subStrInSgn (n1, n2) ran1
adamc@43 2623 in
adamc@86 2624 subSgn (env, denv) dom2 dom1;
adamc@86 2625 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
adamc@43 2626 end
adamc@41 2627
adamc@469 2628 | _ => sgnError env (SgnWrongForm (sgn1, sgn2)))
adamc@41 2629
adamc@61 2630
adamc@312 2631 fun positive self =
adamc@312 2632 let
adamc@312 2633 open L
adamc@312 2634
adamc@312 2635 fun none (c, _) =
adamc@312 2636 case c of
adamc@312 2637 CAnnot (c, _) => none c
adamc@312 2638
adamc@312 2639 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 2640 | TCFun (_, _, _, c) => none c
adamc@312 2641 | TRecord c => none c
adamc@312 2642
adamc@312 2643 | CVar ([], x) => x <> self
adamc@312 2644 | CVar _ => true
adamc@312 2645 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 2646 | CAbs _ => false
adamc@312 2647 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2648
adamc@312 2649 | CName _ => true
adamc@312 2650
adamc@312 2651 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 2652 | CConcat (c1, c2) => none c1 andalso none c2
adamc@312 2653 | CFold => true
adamc@312 2654
adamc@312 2655 | CUnit => true
adamc@312 2656
adamc@312 2657 | CTuple cs => List.all none cs
adamc@312 2658 | CProj (c, _) => none c
adamc@312 2659
adamc@312 2660 | CWild _ => false
adamc@312 2661
adamc@312 2662 fun pos (c, _) =
adamc@312 2663 case c of
adamc@312 2664 CAnnot (c, _) => pos c
adamc@312 2665
adamc@312 2666 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 2667 | TCFun (_, _, _, c) => pos c
adamc@312 2668 | TRecord c => pos c
adamc@312 2669
adamc@312 2670 | CVar _ => true
adamc@312 2671 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 2672 | CAbs _ => false
adamc@312 2673 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2674
adamc@312 2675 | CName _ => true
adamc@312 2676
adamc@312 2677 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 2678 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@312 2679 | CFold => true
adamc@312 2680
adamc@312 2681 | CUnit => true
adamc@312 2682
adamc@312 2683 | CTuple cs => List.all pos cs
adamc@312 2684 | CProj (c, _) => pos c
adamc@312 2685
adamc@312 2686 | CWild _ => false
adamc@312 2687 in
adamc@312 2688 pos
adamc@312 2689 end
adamc@312 2690
adamc@325 2691 fun wildifyStr env (str, sgn) =
adamc@325 2692 case #1 (hnormSgn env sgn) of
adamc@325 2693 L'.SgnConst sgis =>
adamc@325 2694 (case #1 str of
adamc@325 2695 L.StrConst ds =>
adamc@325 2696 let
adamc@325 2697 fun decompileCon env (c, loc) =
adamc@325 2698 case c of
adamc@325 2699 L'.CRel i =>
adamc@325 2700 let
adamc@325 2701 val (s, _) = E.lookupCRel env i
adamc@325 2702 in
adamc@325 2703 SOME (L.CVar ([], s), loc)
adamc@325 2704 end
adamc@325 2705 | L'.CNamed i =>
adamc@325 2706 let
adamc@325 2707 val (s, _, _) = E.lookupCNamed env i
adamc@325 2708 in
adamc@325 2709 SOME (L.CVar ([], s), loc)
adamc@325 2710 end
adamc@325 2711 | L'.CModProj (m1, ms, x) =>
adamc@325 2712 let
adamc@325 2713 val (s, _) = E.lookupStrNamed env m1
adamc@325 2714 in
adamc@325 2715 SOME (L.CVar (s :: ms, x), loc)
adamc@325 2716 end
adamc@325 2717 | L'.CName s => SOME (L.CName s, loc)
adamc@325 2718 | L'.CRecord (_, xcs) =>
adamc@325 2719 let
adamc@325 2720 fun fields xcs =
adamc@325 2721 case xcs of
adamc@325 2722 [] => SOME []
adamc@325 2723 | (x, t) :: xcs =>
adamc@325 2724 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 2725 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 2726 | _ => NONE
adamc@325 2727 in
adamc@325 2728 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 2729 (fields xcs)
adamc@325 2730 end
adamc@325 2731 | L'.CConcat (c1, c2) =>
adamc@325 2732 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 2733 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 2734 | _ => NONE)
adamc@325 2735 | L'.CUnit => SOME (L.CUnit, loc)
adamc@325 2736
adamc@325 2737 | _ => NONE
adamc@325 2738
adamc@469 2739 val (neededC, constraints, neededV, _) =
adamc@469 2740 foldl (fn ((sgi, loc), (neededC, constraints, neededV, env')) =>
adamc@325 2741 let
adamc@469 2742 val (needed, constraints, neededV) =
adamc@325 2743 case sgi of
adamc@469 2744 L'.SgiConAbs (x, _, _) => (SS.add (neededC, x), constraints, neededV)
adamc@469 2745 | L'.SgiConstraint cs => (neededC, (env', cs, loc) :: constraints, neededV)
adamc@469 2746
adamc@469 2747 | L'.SgiVal (x, _, t) =>
adamc@469 2748 let
adamc@469 2749 fun default () = (neededC, constraints, neededV)
adamc@469 2750
adamc@469 2751 val t = normClassConstraint env' t
adamc@469 2752 in
adamc@469 2753 case #1 t of
adamc@469 2754 L'.CApp (f, _) =>
adamc@469 2755 if E.isClass env' f then
adamc@469 2756 (neededC, constraints, SS.add (neededV, x))
adamc@469 2757 else
adamc@469 2758 default ()
adamc@469 2759
adamc@469 2760 | _ => default ()
adamc@469 2761 end
adamc@469 2762
adamc@469 2763 | _ => (neededC, constraints, neededV)
adamc@325 2764 in
adamc@469 2765 (needed, constraints, neededV, E.sgiBinds env' (sgi, loc))
adamc@325 2766 end)
adamc@469 2767 (SS.empty, [], SS.empty, env) sgis
adamc@325 2768
adamc@469 2769 val (neededC, neededV) = foldl (fn ((d, _), needed as (neededC, neededV)) =>
adamc@469 2770 case d of
adamc@469 2771 L.DCon (x, _, _) => ((SS.delete (neededC, x), neededV)
adamc@469 2772 handle NotFound =>
adamc@469 2773 needed)
adamc@469 2774 | L.DClass (x, _) => ((SS.delete (neededC, x), neededV)
adamc@469 2775 handle NotFound => needed)
adamc@469 2776 | L.DVal (x, _, _) => ((neededC, SS.delete (neededV, x))
adamc@469 2777 handle NotFound => needed)
adamc@469 2778 | L.DOpen _ => (SS.empty, SS.empty)
adamc@469 2779 | _ => needed)
adamc@469 2780 (neededC, neededV) ds
adamc@469 2781
adamc@469 2782 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 2783 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 2784 (SOME c1, SOME c2) =>
adamc@325 2785 SOME (L.DConstraint (c1, c2), loc)
adamc@325 2786 | _ => NONE) constraints
adamc@469 2787
adamc@469 2788 val ds' =
adamc@469 2789 case SS.listItems neededV of
adamc@469 2790 [] => ds'
adamc@469 2791 | xs =>
adamc@469 2792 let
adamc@469 2793 val ewild = (L.EWild, #2 str)
adamc@469 2794 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@469 2795 in
adamc@469 2796 ds'' @ ds'
adamc@469 2797 end
adamc@469 2798
adamc@469 2799 val ds' =
adamc@469 2800 case SS.listItems neededC of
adamc@469 2801 [] => ds'
adamc@469 2802 | xs =>
adamc@469 2803 let
adamc@469 2804 val kwild = (L.KWild, #2 str)
adamc@469 2805 val cwild = (L.CWild kwild, #2 str)
adamc@469 2806 val ds'' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
adamc@469 2807 in
adamc@469 2808 ds'' @ ds'
adamc@469 2809 end
adamc@325 2810 in
adamc@469 2811 (L.StrConst (ds @ ds'), #2 str)
adamc@325 2812 end
adamc@325 2813 | _ => str)
adamc@325 2814 | _ => str
adamc@325 2815
adamc@280 2816 fun elabDecl (dAll as (d, loc), (env, denv, gs : constraint list)) =
adamc@255 2817 let
adamc@255 2818 (*val () = preface ("elabDecl", SourcePrint.p_decl (d, loc))*)
adamc@255 2819
adamc@255 2820 val r =
adamc@255 2821 case d of
adamc@255 2822 L.DCon (x, ko, c) =>
adamc@255 2823 let
adamc@255 2824 val k' = case ko of
adamc@255 2825 NONE => kunif loc
adamc@255 2826 | SOME k => elabKind k
adamc@255 2827
adamc@255 2828 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 2829 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 2830 in
adamc@255 2831 checkKind env c' ck k';
adamc@255 2832
adamc@255 2833 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2834 end
adamc@255 2835 | L.DDatatype (x, xs, xcs) =>
adamc@255 2836 let
adamc@312 2837 val positive = List.all (fn (_, to) =>
adamc@312 2838 case to of
adamc@312 2839 NONE => true
adamc@312 2840 | SOME t => positive x t) xcs
adamc@312 2841
adamc@255 2842 val k = (L'.KType, loc)
adamc@255 2843 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2844 val (env, n) = E.pushCNamed env x k' NONE
adamc@255 2845 val t = (L'.CNamed n, loc)
adamc@255 2846 val nxs = length xs - 1
adamc@255 2847 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@255 2848
adamc@255 2849 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@255 2850 (E.pushCRel env' x k,
adamc@255 2851 D.enter denv')) (env, denv) xs
adamc@255 2852
adamc@255 2853 val (xcs, (used, env, gs')) =
adamc@255 2854 ListUtil.foldlMap
adamc@255 2855 (fn ((x, to), (used, env, gs)) =>
adamc@255 2856 let
adamc@255 2857 val (to, t, gs') = case to of
adamc@255 2858 NONE => (NONE, t, gs)
adamc@255 2859 | SOME t' =>
adamc@255 2860 let
adamc@255 2861 val (t', tk, gs') = elabCon (env', denv') t'
adamc@255 2862 in
adamc@255 2863 checkKind env' t' tk k;
adamc@255 2864 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@255 2865 end
adamc@255 2866 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@255 2867
adamc@255 2868 val (env, n') = E.pushENamed env x t
adamc@255 2869 in
adamc@255 2870 if SS.member (used, x) then
adamc@255 2871 strError env (DuplicateConstructor (x, loc))
adamc@255 2872 else
adamc@255 2873 ();
adamc@255 2874 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@255 2875 end)
adamc@255 2876 (SS.empty, env, []) xcs
adamc@255 2877
adamc@255 2878 val env = E.pushDatatype env n xs xcs
adamc@312 2879 val d' = (L'.DDatatype (x, n, xs, xcs), loc)
adamc@255 2880 in
adamc@312 2881 if positive then
adamc@312 2882 ()
adamc@312 2883 else
adamc@312 2884 declError env (Nonpositive d');
adamc@312 2885
adamc@312 2886 ([d'], (env, denv, gs' @ gs))
adamc@255 2887 end
adamc@255 2888
adamc@255 2889 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 2890
adamc@255 2891 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 2892 (case E.lookupStr env m1 of
adamc@255 2893 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 2894 ([], (env, denv, gs)))
adamc@255 2895 | SOME (n, sgn) =>
adamc@255 2896 let
adamc@255 2897 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 2898 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 2899 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 2900 (strerror, sgnerror))
adamc@255 2901 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 2902 ((L'.StrVar n, loc), sgn) ms
adamc@255 2903 in
adamc@255 2904 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@255 2905 ((L'.CModProj (n, ms, s), _), gs') =>
adamc@255 2906 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 2907 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 2908 ([], (env, denv, gs)))
adamc@255 2909 | SOME (xs, xncs) =>
adamc@255 2910 let
adamc@255 2911 val k = (L'.KType, loc)
adamc@255 2912 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2913 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 2914 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 2915 val env = E.pushDatatype env n' xs xncs
adamc@255 2916
adamc@255 2917 val t = (L'.CNamed n', loc)
adamc@255 2918 val env = foldl (fn ((x, n, to), env) =>
adamc@255 2919 let
adamc@255 2920 val t = case to of
adamc@255 2921 NONE => t
adamc@255 2922 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 2923
adamc@255 2924 val t = foldr (fn (x, t) =>
adamc@255 2925 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 2926 t xs
adamc@255 2927 in
adamc@255 2928 E.pushENamedAs env x n t
adamc@255 2929 end) env xncs
adamc@255 2930 in
adamc@255 2931 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, enD gs' @ gs))
adamc@255 2932 end)
adamc@255 2933 | _ => (strError env (NotDatatype loc);
adamc@255 2934 ([], (env, denv, [])))
adamc@255 2935 end)
adamc@255 2936
adamc@255 2937 | L.DVal (x, co, e) =>
adamc@255 2938 let
adamc@255 2939 val (c', _, gs1) = case co of
adamc@255 2940 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2941 | SOME c => elabCon (env, denv) c
adamc@255 2942
adamc@255 2943 val (e', et, gs2) = elabExp (env, denv) e
adamc@255 2944 val gs3 = checkCon (env, denv) e' et c'
adamc@467 2945 val c = normClassConstraint env c'
adamc@255 2946 val (env', n) = E.pushENamed env x c'
adamc@334 2947 val c' = makeInstantiable c'
adamc@255 2948 in
adamc@255 2949 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 2950 ("c'", p_con env c')];*)
adamc@467 2951 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ enD gs3 @ gs))
adamc@255 2952 end
adamc@255 2953 | L.DValRec vis =>
adamc@255 2954 let
adamc@255 2955 fun allowable (e, _) =
adamc@255 2956 case e of
adamc@255 2957 L.EAbs _ => true
adamc@255 2958 | L.ECAbs (_, _, _, e) => allowable e
adamc@255 2959 | L.EDisjoint (_, _, e) => allowable e
adamc@255 2960 | _ => false
adamc@255 2961
adamc@255 2962 val (vis, gs) = ListUtil.foldlMap
adamc@255 2963 (fn ((x, co, e), gs) =>
adamc@255 2964 let
adamc@255 2965 val (c', _, gs1) = case co of
adamc@255 2966 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2967 | SOME c => elabCon (env, denv) c
adamc@255 2968 in
adamc@255 2969 ((x, c', e), enD gs1 @ gs)
adamc@280 2970 end) gs vis
adamc@255 2971
adamc@255 2972 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 2973 let
adamc@255 2974 val (env, n) = E.pushENamed env x c'
adamc@255 2975 in
adamc@255 2976 ((x, n, c', e), env)
adamc@255 2977 end) env vis
adamc@255 2978
adamc@255 2979 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 2980 let
adamc@255 2981 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 2982
adamc@255 2983 val gs2 = checkCon (env, denv) e' et c'
adamc@334 2984
adamc@334 2985 val c' = makeInstantiable c'
adamc@255 2986 in
adamc@255 2987 if allowable e then
adamc@255 2988 ()
adamc@255 2989 else
adamc@255 2990 expError env (IllegalRec (x, e'));
adamc@255 2991 ((x, n, c', e'), gs1 @ enD gs2 @ gs)
adamc@255 2992 end) gs vis
adamc@255 2993 in
adamc@255 2994 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 2995 end
adamc@255 2996
adamc@255 2997 | L.DSgn (x, sgn) =>
adamc@255 2998 let
adamc@255 2999 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3000 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3001 in
adamc@255 3002 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3003 end
adamc@255 3004
adamc@255 3005 | L.DStr (x, sgno, str) =>
adamc@255 3006 let
adamc@255 3007 val () = if x = "Basis" then
adamc@255 3008 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3009 else
adamc@255 3010 ()
adamc@255 3011
adamc@255 3012 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3013
adamc@255 3014 val (str', sgn', gs') =
adamc@255 3015 case formal of
adamc@255 3016 NONE =>
adamc@255 3017 let
adamc@255 3018 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3019 in
adamc@255 3020 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3021 end
adamc@255 3022 | SOME (formal, gs1) =>
adamc@255 3023 let
adamc@325 3024 val str = wildifyStr env (str, formal)
adamc@255 3025 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3026 in
adamc@255 3027 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3028 (str', formal, enD gs1 @ gs2)
adamc@255 3029 end
adamc@255 3030
adamc@255 3031 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3032 in
adamc@255 3033 case #1 (hnormSgn env sgn') of
adamc@255 3034 L'.SgnFun _ =>
adamc@255 3035 (case #1 str' of
adamc@255 3036 L'.StrFun _ => ()
adamc@255 3037 | _ => strError env (FunctorRebind loc))
adamc@255 3038 | _ => ();
adamc@255 3039
adamc@255 3040 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@255 3041 end
adamc@255 3042
adamc@255 3043 | L.DFfiStr (x, sgn) =>
adamc@255 3044 let
adamc@255 3045 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3046
adamc@255 3047 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3048 in
adamc@255 3049 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3050 end
adamc@255 3051
adamc@255 3052 | L.DOpen (m, ms) =>
adamc@255 3053 (case E.lookupStr env m of
adamc@255 3054 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3055 ([], (env, denv, gs)))
adamc@255 3056 | SOME (n, sgn) =>
adamc@255 3057 let
adamc@255 3058 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3059 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@255 3060 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3061 (strerror, sgnerror))
adamc@255 3062 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3063 ((L'.StrVar n, loc), sgn) ms
adamc@255 3064
adamc@255 3065 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
adamc@255 3066 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
adamc@255 3067 in
adamc@255 3068 (ds, (env', denv', gs))
adamc@255 3069 end)
adamc@255 3070
adamc@255 3071 | L.DConstraint (c1, c2) =>
adamc@255 3072 let
adamc@255 3073 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3074 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3075 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3076
adamc@255 3077 val (denv', gs4) = D.assert env denv (c1', c2')
adamc@255 3078 in
adamc@255 3079 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3080 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3081
adamc@255 3082 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ enD gs4 @ gs))
adamc@255 3083 end
adamc@255 3084
adamc@255 3085 | L.DOpenConstraints (m, ms) =>
adamc@255 3086 let
adamc@255 3087 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3088 in
adamc@255 3089 ([], (env, denv, gs))
adamc@255 3090 end
adamc@255 3091
adamc@255 3092 | L.DExport str =>
adamc@255 3093 let
adamc@255 3094 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3095
adamc@255 3096 val sgn =
adamc@255 3097 case #1 (hnormSgn env sgn) of
adamc@255 3098 L'.SgnConst sgis =>
adamc@255 3099 let
adamc@255 3100 fun doOne (all as (sgi, _), env) =
adamc@255 3101 (case sgi of
adamc@255 3102 L'.SgiVal (x, n, t) =>
adamc@325 3103 let
adamc@325 3104 fun doPage (makeRes, ran) =
adamc@325 3105 case hnormCon (env, denv) ran of
adamc@325 3106 ((L'.CApp (tf, arg), _), []) =>
adamc@325 3107 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg) of
adamc@325 3108 (((L'.CModProj (basis, [], "transaction"), _), []),
adamc@325 3109 ((L'.CApp (tf, arg3), _), [])) =>
adamc@325 3110 (case (basis = !basis_r,
adamc@325 3111 hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
adamc@325 3112 (true,
adamc@325 3113 ((L'.CApp (tf, arg2), _), []),
adamc@325 3114 (((L'.CRecord (_, []), _), []))) =>
adamc@325 3115 (case (hnormCon (env, denv) tf) of
adamc@325 3116 ((L'.CApp (tf, arg1), _), []) =>
adamc@325 3117 (case (hnormCon (env, denv) tf,
adamc@325 3118 hnormCon (env, denv) arg1,
adamc@325 3119 hnormCon (env, denv) arg2) of
adamc@325 3120 ((tf, []), (arg1, []),
adamc@325 3121 ((L'.CRecord (_, []), _), [])) =>
adamc@325 3122 let
adamc@325 3123 val t = (L'.CApp (tf, arg1), loc)
adamc@325 3124 val t = (L'.CApp (t, arg2), loc)
adamc@325 3125 val t = (L'.CApp (t, arg3), loc)
adamc@325 3126 val t = (L'.CApp (
adamc@325 3127 (L'.CModProj
adamc@325 3128 (basis, [], "transaction"), loc),
adamc@325 3129 t), loc)
adamc@325 3130 in
adamc@325 3131 (L'.SgiVal (x, n, makeRes t), loc)
adamc@325 3132 end
adamc@325 3133 | _ => all)
adamc@325 3134 | _ => all)
adamc@325 3135 | _ => all)
adamc@325 3136 | _ => all)
adamc@325 3137 | _ => all
adamc@325 3138 in
adamc@325 3139 case hnormCon (env, denv) t of
adamc@325 3140 ((L'.TFun (dom, ran), _), []) =>
adamc@325 3141 (case hnormCon (env, denv) dom of
adamc@325 3142 ((L'.TRecord domR, _), []) =>
adamc@325 3143 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3144 loc),
adamc@325 3145 t), loc), ran)
adamc@325 3146 | _ => all)
adamc@325 3147 | _ => doPage (fn t => t, t)
adamc@325 3148 end
adamc@255 3149 | _ => all,
adamc@255 3150 E.sgiBinds env all)
adamc@255 3151 in
adamc@255 3152 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3153 end
adamc@255 3154 | _ => sgn
adamc@255 3155 in
adamc@255 3156 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3157 end
adamc@255 3158
adamc@255 3159 | L.DTable (x, c) =>
adamc@255 3160 let
adamc@255 3161 val (c', k, gs') = elabCon (env, denv) c
adamc@255 3162 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@255 3163 in
adamc@255 3164 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@255 3165 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3166 end
adamc@338 3167 | L.DSequence x =>
adamc@338 3168 let
adamc@338 3169 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3170 in
adamc@338 3171 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3172 end
adamc@255 3173
adamc@255 3174 | L.DClass (x, c) =>
adamc@255 3175 let
adamc@255 3176 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@280 3177 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3178 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3179 val env = E.pushClass env n
adamc@255 3180 in
adamc@255 3181 checkKind env c' ck k;
adamc@280 3182 ([(L'.DClass (x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3183 end
adamc@271 3184
adamc@280 3185 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3186
adamc@459 3187 | L.DCookie (x, c) =>
adamc@459 3188 let
adamc@459 3189 val (c', k, gs') = elabCon (env, denv) c
adamc@459 3190 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 3191 in
adamc@459 3192 checkKind env c' k (L'.KType, loc);
adamc@459 3193 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 3194 end
adamc@459 3195
adamc@280 3196 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3197 in
adamc@280 3198 (*prefaces "elabDecl" [("e", SourcePrint.p_decl dAll),
adamc@280 3199 ("|tcs|", PD.string (Int.toString (length tcs)))];*)
adamc@280 3200
adamc@255 3201 r
adamc@255 3202 end
adamc@211 3203
adamc@83 3204 and elabStr (env, denv) (str, loc) =
adamc@31 3205 case str of
adamc@31 3206 L.StrConst ds =>
adamc@31 3207 let
adamc@88 3208 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3209 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3210
adamc@63 3211 val (sgis, _, _, _, _) =
adamc@64 3212 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3213 case sgi of
adamc@64 3214 L'.SgiConAbs (x, n, k) =>
adamc@64 3215 let
adamc@64 3216 val (cons, x) =
adamc@64 3217 if SS.member (cons, x) then
adamc@64 3218 (cons, "?" ^ x)
adamc@64 3219 else
adamc@64 3220 (SS.add (cons, x), x)
adamc@64 3221 in
adamc@64 3222 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3223 end
adamc@64 3224 | L'.SgiCon (x, n, k, c) =>
adamc@64 3225 let
adamc@64 3226 val (cons, x) =
adamc@64 3227 if SS.member (cons, x) then
adamc@64 3228 (cons, "?" ^ x)
adamc@64 3229 else
adamc@64 3230 (SS.add (cons, x), x)
adamc@64 3231 in
adamc@64 3232 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3233 end
adamc@191 3234 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 3235 let
adamc@156 3236 val (cons, x) =
adamc@156 3237 if SS.member (cons, x) then
adamc@156 3238 (cons, "?" ^ x)
adamc@156 3239 else
adamc@156 3240 (SS.add (cons, x), x)
adamc@156 3241
adamc@156 3242 val (xncs, vals) =
adamc@156 3243 ListUtil.foldlMap
adamc@156 3244 (fn ((x, n, t), vals) =>
adamc@156 3245 if SS.member (vals, x) then
adamc@156 3246 (("?" ^ x, n, t), vals)
adamc@156 3247 else
adamc@156 3248 ((x, n, t), SS.add (vals, x)))
adamc@156 3249 vals xncs
adamc@156 3250 in
adamc@191 3251 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3252 end
adamc@191 3253 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3254 let
adamc@156 3255 val (cons, x) =
adamc@156 3256 if SS.member (cons, x) then
adamc@156 3257 (cons, "?" ^ x)
adamc@156 3258 else
adamc@156 3259 (SS.add (cons, x), x)
adamc@156 3260 in
adamc@191 3261 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3262 end
adamc@64 3263 | L'.SgiVal (x, n, c) =>
adamc@64 3264 let
adamc@64 3265 val (vals, x) =
adamc@64 3266 if SS.member (vals, x) then
adamc@64 3267 (vals, "?" ^ x)
adamc@64 3268 else
adamc@64 3269 (SS.add (vals, x), x)
adamc@64 3270 in
adamc@64 3271 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3272 end
adamc@64 3273 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3274 let
adamc@64 3275 val (sgns, x) =
adamc@64 3276 if SS.member (sgns, x) then
adamc@64 3277 (sgns, "?" ^ x)
adamc@64 3278 else
adamc@64 3279 (SS.add (sgns, x), x)
adamc@64 3280 in
adamc@64 3281 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3282 end
adamc@64 3283
adamc@64 3284 | L'.SgiStr (x, n, sgn) =>
adamc@64 3285 let
adamc@64 3286 val (strs, x) =
adamc@64 3287 if SS.member (strs, x) then
adamc@64 3288 (strs, "?" ^ x)
adamc@64 3289 else
adamc@64 3290 (SS.add (strs, x), x)
adamc@64 3291 in
adamc@64 3292 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3293 end
adamc@203 3294 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3295 | L'.SgiClassAbs (x, n) =>
adamc@211 3296 let
adamc@211 3297 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3298
adamc@211 3299 val (cons, x) =
adamc@211 3300 if SS.member (cons, x) then
adamc@211 3301 (cons, "?" ^ x)
adamc@211 3302 else
adamc@211 3303 (SS.add (cons, x), x)
adamc@211 3304 in
adamc@211 3305 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3306 end
adamc@211 3307 | L'.SgiClass (x, n, c) =>
adamc@211 3308 let
adamc@211 3309 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3310
adamc@211 3311 val (cons, x) =
adamc@211 3312 if SS.member (cons, x) then
adamc@211 3313 (cons, "?" ^ x)
adamc@211 3314 else
adamc@211 3315 (SS.add (cons, x), x)
adamc@211 3316 in
adamc@211 3317 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3318 end)
adamc@64 3319
adamc@63 3320 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3321 in
adamc@83 3322 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3323 end
adamc@31 3324 | L.StrVar x =>
adamc@31 3325 (case E.lookupStr env x of
adamc@31 3326 NONE =>
adamc@31 3327 (strError env (UnboundStr (loc, x));
adamc@83 3328 (strerror, sgnerror, []))
adamc@83 3329 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3330 | L.StrProj (str, x) =>
adamc@34 3331 let
adamc@83 3332 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3333 in
adamc@34 3334 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3335 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3336 (strerror, sgnerror, []))
adamc@83 3337 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3338 end
adamc@41 3339 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3340 let
adamc@83 3341 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3342 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3343 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3344
adamc@83 3345 val (formal, gs3) =
adamc@41 3346 case ranO of
adamc@83 3347 NONE => (actual, [])
adamc@41 3348 | SOME ran =>
adamc@41 3349 let
adamc@83 3350 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3351 in
adamc@86 3352 subSgn (env', denv) actual ran';
adamc@83 3353 (ran', gs)
adamc@41 3354 end
adamc@41 3355 in
adamc@41 3356 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3357 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3358 enD gs1 @ gs2 @ enD gs3)
adamc@41 3359 end
adamc@44 3360 | L.StrApp (str1, str2) =>
adamc@44 3361 let
adamc@83 3362 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3363 val str2 =
adamc@325 3364 case sgn1 of
adamc@325 3365 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3366 wildifyStr env (str2, dom)
adamc@325 3367 | _ => str2
adamc@83 3368 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3369 in
adamc@44 3370 case #1 (hnormSgn env sgn1) of
adamc@83 3371 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3372 | L'.SgnFun (m, n, dom, ran) =>
adamc@86 3373 (subSgn (env, denv) sgn2 dom;
adamc@44 3374 case #1 (hnormSgn env ran) of
adamc@83 3375 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3376 | L'.SgnConst sgis =>
adamc@44 3377 ((L'.StrApp (str1', str2'), loc),
adamc@83 3378 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3379 gs1 @ gs2)
adamc@44 3380 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3381 | _ => (strError env (NotFunctor sgn1);
adamc@83 3382 (strerror, sgnerror, []))
adamc@44 3383 end
adamc@31 3384
adamc@325 3385 fun elabFile basis topStr topSgn env file =
adamc@56 3386 let
adamc@83 3387 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3388 val () = case gs of
adamc@83 3389 [] => ()
adamc@207 3390 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3391 prefaces "Unresolved"
adamc@207 3392 [("c1", p_con env c1),
adamc@207 3393 ("c2", p_con env c2)]) gs;
adamc@207 3394 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3395
adamc@56 3396 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3397 val () = basis_r := basis_n
adamc@56 3398
adamc@88 3399 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
adamc@56 3400
adamc@56 3401 fun discoverC r x =
adamc@56 3402 case E.lookupC env' x of
adamc@56 3403 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3404 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3405 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3406
adamc@56 3407 val () = discoverC int "int"
adamc@56 3408 val () = discoverC float "float"
adamc@56 3409 val () = discoverC string "string"
adamc@203 3410 val () = discoverC table "sql_table"
adamc@56 3411
adamc@325 3412 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3413 val () = case gs of
adamc@325 3414 [] => ()
adamc@325 3415 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3416 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3417 val () = case gs of
adamc@325 3418 [] => ()
adamc@329 3419 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3420 (case D.prove env denv (c1, c2, loc) of
adamc@329 3421 [] => ()
adamc@329 3422 | _ =>
adamc@329 3423 (prefaces "Unresolved constraint in top.ur"
adamc@329 3424 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3425 ("c1", p_con env c1),
adamc@329 3426 ("c2", p_con env c2)];
adamc@329 3427 raise Fail "Unresolve constraint in top.ur"))
adamc@329 3428 | TypeClass _ => raise Fail "Unresolved type class constraint in top.ur") gs
adamc@325 3429 val () = subSgn (env', D.empty) topSgn' topSgn
adamc@325 3430
adamc@325 3431 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@325 3432
adamc@325 3433 val (ds', (env', _)) = dopen (env', D.empty) {str = top_n, strs = [], sgn = topSgn}
adamc@325 3434
adamc@83 3435 fun elabDecl' (d, (env, gs)) =
adamc@76 3436 let
adamc@76 3437 val () = resetKunif ()
adamc@76 3438 val () = resetCunif ()
adamc@88 3439 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3440 in
adamc@76 3441 if ErrorMsg.anyErrors () then
adamc@76 3442 ()
adamc@76 3443 else (
adamc@76 3444 if List.exists kunifsInDecl ds then
adamc@91 3445 declError env (KunifsRemain ds)
adamc@76 3446 else
adamc@76 3447 ();
adamc@76 3448
adamc@76 3449 case ListUtil.search cunifsInDecl ds of
adamc@76 3450 NONE => ()
adamc@76 3451 | SOME loc =>
adamc@91 3452 declError env (CunifsRemain ds)
adamc@76 3453 );
adamc@76 3454
adamc@83 3455 (ds, (env, gs))
adamc@76 3456 end
adamc@76 3457
adamc@83 3458 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3459 in
adamc@84 3460 if ErrorMsg.anyErrors () then
adamc@84 3461 ()
adamc@84 3462 else
adamc@228 3463 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@228 3464 (case D.prove env denv (c1, c2, loc) of
adamc@228 3465 [] => ()
adamc@228 3466 | _ =>
adamc@228 3467 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@228 3468 eprefaces' [("Con 1", p_con env c1),
adamc@228 3469 ("Con 2", p_con env c2),
adamc@228 3470 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@228 3471 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))]))
adamc@228 3472 | TypeClass (env, c, r, loc) =>
adamc@349 3473 let
adamc@467 3474 val c = normClassKey env c
adamc@349 3475 in
adamc@349 3476 case E.resolveClass env c of
adamc@349 3477 SOME e => r := SOME e
adamc@349 3478 | NONE => expError env (Unresolvable (loc, c))
adamc@349 3479 end) gs;
adamc@83 3480
adamc@325 3481 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 3482 :: ds
adamc@325 3483 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 3484 :: ds' @ file
adamc@56 3485 end
adamc@2 3486
adamc@2 3487 end