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annotate src/elaborate.sml @ 341:389399d65331

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Crud update form
author Adam Chlipala <adamc@hcoop.net>
date Sun, 14 Sep 2008 19:03:55 -0400
parents 075b36dbb1a4
children b85e6ba56618
rev   line source
adamc@2 1 (* Copyright (c) 2008, Adam Chlipala
adamc@2 2 * All rights reserved.
adamc@2 3 *
adamc@2 4 * Redistribution and use in source and binary forms, with or without
adamc@2 5 * modification, are permitted provided that the following conditions are met:
adamc@2 6 *
adamc@2 7 * - Redistributions of source code must retain the above copyright notice,
adamc@2 8 * this list of conditions and the following disclaimer.
adamc@2 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@2 10 * this list of conditions and the following disclaimer in the documentation
adamc@2 11 * and/or other materials provided with the distribution.
adamc@2 12 * - The names of contributors may not be used to endorse or promote products
adamc@2 13 * derived from this software without specific prior written permission.
adamc@2 14 *
adamc@2 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@2 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@2 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@2 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@2 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@2 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@2 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@2 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@2 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@2 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@2 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@2 26 *)
adamc@2 27
adamc@2 28 structure Elaborate :> ELABORATE = struct
adamc@2 29
adamc@14 30 structure P = Prim
adamc@4 31 structure L = Source
adamc@2 32 structure L' = Elab
adamc@2 33 structure E = ElabEnv
adamc@2 34 structure U = ElabUtil
adamc@82 35 structure D = Disjoint
adamc@2 36
adamc@3 37 open Print
adamc@3 38 open ElabPrint
adamc@329 39 open ElabErr
adamc@3 40
adamc@172 41 structure IM = IntBinaryMap
adamc@175 42
adamc@175 43 structure SK = struct
adamc@175 44 type ord_key = string
adamc@175 45 val compare = String.compare
adamc@175 46 end
adamc@175 47
adamc@175 48 structure SS = BinarySetFn(SK)
adamc@175 49 structure SM = BinaryMapFn(SK)
adamc@62 50
adamc@210 51 val basis_r = ref 0
adamc@210 52
adamc@2 53 fun elabExplicitness e =
adamc@2 54 case e of
adamc@2 55 L.Explicit => L'.Explicit
adamc@2 56 | L.Implicit => L'.Implicit
adamc@2 57
adamc@2 58 fun occursKind r =
adamc@76 59 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@2 60 | _ => false)
adamc@2 61
adamc@3 62 exception KUnify' of kunify_error
adamc@3 63
adamc@3 64 fun unifyKinds' (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@2 65 let
adamc@3 66 fun err f = raise KUnify' (f (k1All, k2All))
adamc@2 67 in
adamc@2 68 case (k1, k2) of
adamc@2 69 (L'.KType, L'.KType) => ()
adamc@82 70 | (L'.KUnit, L'.KUnit) => ()
adamc@82 71
adamc@2 72 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@3 73 (unifyKinds' d1 d2;
adamc@3 74 unifyKinds' r1 r2)
adamc@2 75 | (L'.KName, L'.KName) => ()
adamc@3 76 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' k1 k2
adamc@207 77 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@207 78 ((ListPair.appEq (fn (k1, k2) => unifyKinds' k1 k2) (ks1, ks2))
adamc@207 79 handle ListPair.UnequalLengths => err KIncompatible)
adamc@2 80
adamc@2 81 | (L'.KError, _) => ()
adamc@2 82 | (_, L'.KError) => ()
adamc@2 83
adamc@76 84 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' k1All k2All
adamc@76 85 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' k1All k2All
adamc@2 86
adamc@76 87 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@2 88 if r1 = r2 then
adamc@2 89 ()
adamc@2 90 else
adamc@2 91 r1 := SOME k2All
adamc@2 92
adamc@76 93 | (L'.KUnif (_, _, r), _) =>
adamc@2 94 if occursKind r k2All then
adamc@2 95 err KOccursCheckFailed
adamc@2 96 else
adamc@2 97 r := SOME k2All
adamc@76 98 | (_, L'.KUnif (_, _, r)) =>
adamc@2 99 if occursKind r k1All then
adamc@2 100 err KOccursCheckFailed
adamc@2 101 else
adamc@2 102 r := SOME k1All
adamc@2 103
adamc@2 104 | _ => err KIncompatible
adamc@2 105 end
adamc@2 106
adamc@3 107 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@3 108
adamc@3 109 fun unifyKinds k1 k2 =
adamc@3 110 unifyKinds' k1 k2
adamc@3 111 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@3 112
adamc@5 113 fun checkKind env c k1 k2 =
adamc@3 114 unifyKinds k1 k2
adamc@3 115 handle KUnify (k1, k2, err) =>
adamc@5 116 conError env (WrongKind (c, k1, k2, err))
adamc@3 117
adamc@3 118 val dummy = ErrorMsg.dummySpan
adamc@3 119
adamc@3 120 val ktype = (L'.KType, dummy)
adamc@3 121 val kname = (L'.KName, dummy)
adamc@12 122 val ktype_record = (L'.KRecord ktype, dummy)
adamc@3 123
adamc@3 124 val cerror = (L'.CError, dummy)
adamc@3 125 val kerror = (L'.KError, dummy)
adamc@10 126 val eerror = (L'.EError, dummy)
adamc@31 127 val sgnerror = (L'.SgnError, dummy)
adamc@31 128 val strerror = (L'.StrError, dummy)
adamc@3 129
adamc@56 130 val int = ref cerror
adamc@56 131 val float = ref cerror
adamc@56 132 val string = ref cerror
adamc@203 133 val table = ref cerror
adamc@56 134
adamc@3 135 local
adamc@3 136 val count = ref 0
adamc@3 137 in
adamc@3 138
adamc@3 139 fun resetKunif () = count := 0
adamc@3 140
adamc@76 141 fun kunif loc =
adamc@3 142 let
adamc@3 143 val n = !count
adamc@3 144 val s = if n <= 26 then
adamc@3 145 str (chr (ord #"A" + n))
adamc@3 146 else
adamc@3 147 "U" ^ Int.toString (n - 26)
adamc@3 148 in
adamc@3 149 count := n + 1;
adamc@76 150 (L'.KUnif (loc, s, ref NONE), dummy)
adamc@3 151 end
adamc@3 152
adamc@3 153 end
adamc@3 154
adamc@10 155 local
adamc@10 156 val count = ref 0
adamc@10 157 in
adamc@10 158
adamc@10 159 fun resetCunif () = count := 0
adamc@10 160
adamc@76 161 fun cunif (loc, k) =
adamc@10 162 let
adamc@10 163 val n = !count
adamc@10 164 val s = if n <= 26 then
adamc@10 165 str (chr (ord #"A" + n))
adamc@10 166 else
adamc@10 167 "U" ^ Int.toString (n - 26)
adamc@10 168 in
adamc@10 169 count := n + 1;
adamc@76 170 (L'.CUnif (loc, k, s, ref NONE), dummy)
adamc@10 171 end
adamc@10 172
adamc@10 173 end
adamc@10 174
adamc@18 175 fun elabKind (k, loc) =
adamc@18 176 case k of
adamc@18 177 L.KType => (L'.KType, loc)
adamc@18 178 | L.KArrow (k1, k2) => (L'.KArrow (elabKind k1, elabKind k2), loc)
adamc@18 179 | L.KName => (L'.KName, loc)
adamc@18 180 | L.KRecord k => (L'.KRecord (elabKind k), loc)
adamc@82 181 | L.KUnit => (L'.KUnit, loc)
adamc@207 182 | L.KTuple ks => (L'.KTuple (map elabKind ks), loc)
adamc@76 183 | L.KWild => kunif loc
adamc@18 184
adamc@67 185 fun foldKind (dom, ran, loc)=
adamc@67 186 (L'.KArrow ((L'.KArrow ((L'.KName, loc),
adamc@67 187 (L'.KArrow (dom,
adamc@67 188 (L'.KArrow (ran, ran), loc)), loc)), loc),
adamc@67 189 (L'.KArrow (ran,
adamc@67 190 (L'.KArrow ((L'.KRecord dom, loc),
adamc@67 191 ran), loc)), loc)), loc)
adamc@67 192
adamc@207 193 fun hnormKind (kAll as (k, _)) =
adamc@207 194 case k of
adamc@207 195 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@207 196 | _ => kAll
adamc@207 197
adamc@83 198 fun elabCon (env, denv) (c, loc) =
adamc@3 199 case c of
adamc@3 200 L.CAnnot (c, k) =>
adamc@3 201 let
adamc@3 202 val k' = elabKind k
adamc@83 203 val (c', ck, gs) = elabCon (env, denv) c
adamc@3 204 in
adamc@5 205 checkKind env c' ck k';
adamc@83 206 (c', k', gs)
adamc@3 207 end
adamc@3 208
adamc@3 209 | L.TFun (t1, t2) =>
adamc@3 210 let
adamc@83 211 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@83 212 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@3 213 in
adamc@5 214 checkKind env t1' k1 ktype;
adamc@5 215 checkKind env t2' k2 ktype;
adamc@83 216 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@3 217 end
adamc@3 218 | L.TCFun (e, x, k, t) =>
adamc@3 219 let
adamc@3 220 val e' = elabExplicitness e
adamc@3 221 val k' = elabKind k
adamc@3 222 val env' = E.pushCRel env x k'
adamc@83 223 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@3 224 in
adamc@5 225 checkKind env t' tk ktype;
adamc@83 226 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@3 227 end
adamc@85 228 | L.TDisjoint (c1, c2, c) =>
adamc@85 229 let
adamc@85 230 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@85 231 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@85 232
adamc@85 233 val ku1 = kunif loc
adamc@85 234 val ku2 = kunif loc
adamc@85 235
adamc@90 236 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@90 237 val (c', k, gs4) = elabCon (env, denv') c
adamc@85 238 in
adamc@85 239 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@85 240 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@85 241
adamc@334 242 ((L'.TDisjoint (L'.Instantiate, c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
adamc@85 243 end
adamc@3 244 | L.TRecord c =>
adamc@3 245 let
adamc@83 246 val (c', ck, gs) = elabCon (env, denv) c
adamc@3 247 val k = (L'.KRecord ktype, loc)
adamc@3 248 in
adamc@5 249 checkKind env c' ck k;
adamc@83 250 ((L'.TRecord c', loc), ktype, gs)
adamc@3 251 end
adamc@3 252
adamc@34 253 | L.CVar ([], s) =>
adamc@3 254 (case E.lookupC env s of
adamc@9 255 E.NotBound =>
adamc@5 256 (conError env (UnboundCon (loc, s));
adamc@83 257 (cerror, kerror, []))
adamc@9 258 | E.Rel (n, k) =>
adamc@83 259 ((L'.CRel n, loc), k, [])
adamc@9 260 | E.Named (n, k) =>
adamc@83 261 ((L'.CNamed n, loc), k, []))
adamc@34 262 | L.CVar (m1 :: ms, s) =>
adamc@34 263 (case E.lookupStr env m1 of
adamc@42 264 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@83 265 (cerror, kerror, []))
adamc@34 266 | SOME (n, sgn) =>
adamc@34 267 let
adamc@34 268 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@34 269 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@34 270 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@34 271 (strerror, sgnerror))
adamc@34 272 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@34 273 ((L'.StrVar n, loc), sgn) ms
adamc@34 274
adamc@34 275 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@34 276 NONE => (conError env (UnboundCon (loc, s));
adamc@34 277 kerror)
adamc@34 278 | SOME (k, _) => k
adamc@34 279 in
adamc@83 280 ((L'.CModProj (n, ms, s), loc), k, [])
adamc@34 281 end)
adamc@34 282
adamc@3 283 | L.CApp (c1, c2) =>
adamc@3 284 let
adamc@83 285 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@83 286 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@76 287 val dom = kunif loc
adamc@76 288 val ran = kunif loc
adamc@3 289 in
adamc@5 290 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@5 291 checkKind env c2' k2 dom;
adamc@83 292 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@3 293 end
adamc@67 294 | L.CAbs (x, ko, t) =>
adamc@3 295 let
adamc@67 296 val k' = case ko of
adamc@76 297 NONE => kunif loc
adamc@67 298 | SOME k => elabKind k
adamc@3 299 val env' = E.pushCRel env x k'
adamc@83 300 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@3 301 in
adamc@8 302 ((L'.CAbs (x, k', t'), loc),
adamc@83 303 (L'.KArrow (k', tk), loc),
adamc@83 304 gs)
adamc@3 305 end
adamc@3 306
adamc@84 307 | L.CDisjoint (c1, c2, c) =>
adamc@84 308 let
adamc@84 309 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@84 310 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@84 311
adamc@84 312 val ku1 = kunif loc
adamc@84 313 val ku2 = kunif loc
adamc@84 314
adamc@90 315 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@90 316 val (c', k, gs4) = elabCon (env, denv') c
adamc@84 317 in
adamc@84 318 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@84 319 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@84 320
adamc@90 321 ((L'.CDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
adamc@84 322 end
adamc@84 323
adamc@3 324 | L.CName s =>
adamc@83 325 ((L'.CName s, loc), kname, [])
adamc@3 326
adamc@3 327 | L.CRecord xcs =>
adamc@3 328 let
adamc@76 329 val k = kunif loc
adamc@3 330
adamc@83 331 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@83 332 let
adamc@83 333 val (x', xk, gs1) = elabCon (env, denv) x
adamc@83 334 val (c', ck, gs2) = elabCon (env, denv) c
adamc@83 335 in
adamc@83 336 checkKind env x' xk kname;
adamc@83 337 checkKind env c' ck k;
adamc@83 338 ((x', c'), gs1 @ gs2 @ gs)
adamc@83 339 end) [] xcs
adamc@67 340
adamc@67 341 val rc = (L'.CRecord (k, xcs'), loc)
adamc@67 342 (* Add duplicate field checking later. *)
adamc@83 343
adamc@83 344 fun prove (xcs, ds) =
adamc@83 345 case xcs of
adamc@83 346 [] => ds
adamc@83 347 | xc :: rest =>
adamc@83 348 let
adamc@83 349 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@83 350 val ds = foldl (fn (xc', ds) =>
adamc@83 351 let
adamc@83 352 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@83 353 in
adamc@90 354 D.prove env denv (r1, r2, loc) @ ds
adamc@83 355 end)
adamc@83 356 ds rest
adamc@83 357 in
adamc@83 358 prove (rest, ds)
adamc@83 359 end
adamc@3 360 in
adamc@83 361 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@3 362 end
adamc@3 363 | L.CConcat (c1, c2) =>
adamc@3 364 let
adamc@83 365 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@83 366 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@76 367 val ku = kunif loc
adamc@3 368 val k = (L'.KRecord ku, loc)
adamc@3 369 in
adamc@5 370 checkKind env c1' k1 k;
adamc@5 371 checkKind env c2' k2 k;
adamc@83 372 ((L'.CConcat (c1', c2'), loc), k,
adamc@90 373 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@3 374 end
adamc@67 375 | L.CFold =>
adamc@67 376 let
adamc@76 377 val dom = kunif loc
adamc@76 378 val ran = kunif loc
adamc@67 379 in
adamc@67 380 ((L'.CFold (dom, ran), loc),
adamc@83 381 foldKind (dom, ran, loc),
adamc@83 382 [])
adamc@67 383 end
adamc@3 384
adamc@83 385 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@82 386
adamc@207 387 | L.CTuple cs =>
adamc@207 388 let
adamc@207 389 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@207 390 let
adamc@207 391 val (c', k, gs') = elabCon (env, denv) c
adamc@207 392 in
adamc@207 393 (c' :: cs', k :: ks, gs' @ gs)
adamc@207 394 end) ([], [], []) cs
adamc@207 395 in
adamc@207 396 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@207 397 end
adamc@207 398 | L.CProj (c, n) =>
adamc@207 399 let
adamc@207 400 val (c', k, gs) = elabCon (env, denv) c
adamc@207 401 in
adamc@207 402 case hnormKind k of
adamc@207 403 (L'.KTuple ks, _) =>
adamc@207 404 if n <= 0 orelse n > length ks then
adamc@207 405 (conError env (ProjBounds (c', n));
adamc@207 406 (cerror, kerror, []))
adamc@207 407 else
adamc@207 408 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@207 409 | k => (conError env (ProjMismatch (c', k));
adamc@207 410 (cerror, kerror, []))
adamc@207 411 end
adamc@207 412
adamc@18 413 | L.CWild k =>
adamc@18 414 let
adamc@18 415 val k' = elabKind k
adamc@18 416 in
adamc@83 417 (cunif (loc, k'), k', [])
adamc@18 418 end
adamc@18 419
adamc@6 420 fun kunifsRemain k =
adamc@6 421 case k of
adamc@76 422 L'.KUnif (_, _, ref NONE) => true
adamc@6 423 | _ => false
adamc@10 424 fun cunifsRemain c =
adamc@10 425 case c of
adamc@76 426 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@76 427 | _ => NONE
adamc@6 428
adamc@76 429 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@76 430 con = fn _ => false,
adamc@76 431 exp = fn _ => false,
adamc@76 432 sgn_item = fn _ => false,
adamc@76 433 sgn = fn _ => false,
adamc@76 434 str = fn _ => false,
adamc@76 435 decl = fn _ => false}
adamc@10 436
adamc@76 437 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@76 438 con = cunifsRemain,
adamc@76 439 exp = fn _ => NONE,
adamc@76 440 sgn_item = fn _ => NONE,
adamc@76 441 sgn = fn _ => NONE,
adamc@76 442 str = fn _ => NONE,
adamc@76 443 decl = fn _ => NONE}
adamc@10 444
adamc@10 445 fun occursCon r =
adamc@10 446 U.Con.exists {kind = fn _ => false,
adamc@76 447 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@10 448 | _ => false}
adamc@10 449
adamc@10 450 exception CUnify' of cunify_error
adamc@10 451
adamc@13 452 exception SynUnif = E.SynUnif
adamc@12 453
adamc@81 454 open ElabOps
adamc@43 455
adamc@12 456 type record_summary = {
adamc@12 457 fields : (L'.con * L'.con) list,
adamc@12 458 unifs : (L'.con * L'.con option ref) list,
adamc@12 459 others : L'.con list
adamc@12 460 }
adamc@12 461
adamc@12 462 fun summaryToCon {fields, unifs, others} =
adamc@12 463 let
adamc@12 464 val c = (L'.CRecord (ktype, []), dummy)
adamc@12 465 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@12 466 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@12 467 in
adamc@12 468 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@12 469 end
adamc@12 470
adamc@12 471 fun p_summary env s = p_con env (summaryToCon s)
adamc@12 472
adamc@12 473 exception CUnify of L'.con * L'.con * cunify_error
adamc@12 474
adamc@12 475 fun kindof env (c, loc) =
adamc@12 476 case c of
adamc@12 477 L'.TFun _ => ktype
adamc@12 478 | L'.TCFun _ => ktype
adamc@85 479 | L'.TDisjoint _ => ktype
adamc@12 480 | L'.TRecord _ => ktype
adamc@12 481
adamc@12 482 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@12 483 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@34 484 | L'.CModProj (n, ms, x) =>
adamc@34 485 let
adamc@34 486 val (_, sgn) = E.lookupStrNamed env n
adamc@34 487 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@34 488 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@34 489 NONE => raise Fail "kindof: Unknown substructure"
adamc@34 490 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@34 491 ((L'.StrVar n, loc), sgn) ms
adamc@34 492 in
adamc@34 493 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@34 494 NONE => raise Fail "kindof: Unknown con in structure"
adamc@34 495 | SOME (k, _) => k
adamc@34 496 end
adamc@34 497
adamc@12 498 | L'.CApp (c, _) =>
adamc@141 499 (case hnormKind (kindof env c) of
adamc@141 500 (L'.KArrow (_, k), _) => k
adamc@141 501 | (L'.KError, _) => kerror
adamc@141 502 | k => raise CUnify' (CKindof (k, c)))
adamc@12 503 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@84 504 | L'.CDisjoint (_, _, c) => kindof env c
adamc@12 505
adamc@12 506 | L'.CName _ => kname
adamc@12 507
adamc@12 508 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@12 509 | L'.CConcat (c, _) => kindof env c
adamc@67 510 | L'.CFold (dom, ran) => foldKind (dom, ran, loc)
adamc@12 511
adamc@82 512 | L'.CUnit => (L'.KUnit, loc)
adamc@82 513
adamc@207 514 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@207 515 | L'.CProj (c, n) =>
adamc@207 516 (case hnormKind (kindof env c) of
adamc@207 517 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@207 518 | k => raise CUnify' (CKindof (k, c)))
adamc@207 519
adamc@12 520 | L'.CError => kerror
adamc@76 521 | L'.CUnif (_, k, _, _) => k
adamc@12 522
adamc@90 523 val hnormCon = D.hnormCon
adamc@86 524
adamc@205 525 datatype con_summary =
adamc@205 526 Nil
adamc@205 527 | Cons
adamc@205 528 | Unknown
adamc@205 529
adamc@205 530 fun compatible cs =
adamc@205 531 case cs of
adamc@205 532 (Unknown, _) => false
adamc@205 533 | (_, Unknown) => false
adamc@205 534 | (s1, s2) => s1 = s2
adamc@205 535
adamc@205 536 fun summarizeCon (env, denv) c =
adamc@205 537 let
adamc@205 538 val (c, gs) = hnormCon (env, denv) c
adamc@205 539 in
adamc@205 540 case #1 c of
adamc@205 541 L'.CRecord (_, []) => (Nil, gs)
adamc@205 542 | L'.CRecord (_, _ :: _) => (Cons, gs)
adamc@205 543 | L'.CConcat ((L'.CRecord (_, _ :: _), _), _) => (Cons, gs)
adamc@205 544 | L'.CDisjoint (_, _, c) =>
adamc@205 545 let
adamc@205 546 val (s, gs') = summarizeCon (env, denv) c
adamc@205 547 in
adamc@205 548 (s, gs @ gs')
adamc@205 549 end
adamc@205 550 | _ => (Unknown, gs)
adamc@205 551 end
adamc@205 552
adamc@205 553 fun p_con_summary s =
adamc@205 554 Print.PD.string (case s of
adamc@205 555 Nil => "Nil"
adamc@205 556 | Cons => "Cons"
adamc@205 557 | Unknown => "Unknown")
adamc@205 558
adamc@223 559 exception SummaryFailure
adamc@223 560
adamc@86 561 fun unifyRecordCons (env, denv) (c1, c2) =
adamc@12 562 let
adamc@92 563 fun rkindof c =
adamc@147 564 case hnormKind (kindof env c) of
adamc@92 565 (L'.KRecord k, _) => k
adamc@141 566 | (L'.KError, _) => kerror
adamc@141 567 | k => raise CUnify' (CKindof (k, c))
adamc@92 568
adamc@92 569 val k1 = rkindof c1
adamc@92 570 val k2 = rkindof c2
adamc@86 571
adamc@86 572 val (r1, gs1) = recordSummary (env, denv) c1
adamc@86 573 val (r2, gs2) = recordSummary (env, denv) c2
adamc@12 574 in
adamc@12 575 unifyKinds k1 k2;
adamc@86 576 unifySummaries (env, denv) (k1, r1, r2);
adamc@86 577 gs1 @ gs2
adamc@12 578 end
adamc@12 579
adamc@86 580 and recordSummary (env, denv) c =
adamc@86 581 let
adamc@86 582 val (c, gs) = hnormCon (env, denv) c
adamc@12 583
adamc@86 584 val (sum, gs') =
adamc@86 585 case c of
adamc@86 586 (L'.CRecord (_, xcs), _) => ({fields = xcs, unifs = [], others = []}, [])
adamc@86 587 | (L'.CConcat (c1, c2), _) =>
adamc@86 588 let
adamc@86 589 val (s1, gs1) = recordSummary (env, denv) c1
adamc@86 590 val (s2, gs2) = recordSummary (env, denv) c2
adamc@86 591 in
adamc@86 592 ({fields = #fields s1 @ #fields s2,
adamc@86 593 unifs = #unifs s1 @ #unifs s2,
adamc@86 594 others = #others s1 @ #others s2},
adamc@86 595 gs1 @ gs2)
adamc@86 596 end
adamc@86 597 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary (env, denv) c
adamc@86 598 | c' as (L'.CUnif (_, _, _, r), _) => ({fields = [], unifs = [(c', r)], others = []}, [])
adamc@86 599 | c' => ({fields = [], unifs = [], others = [c']}, [])
adamc@86 600 in
adamc@86 601 (sum, gs @ gs')
adamc@86 602 end
adamc@86 603
adamc@86 604 and consEq (env, denv) (c1, c2) =
adamc@209 605 let
adamc@209 606 val gs = unifyCons (env, denv) c1 c2
adamc@209 607 in
adamc@209 608 List.all (fn (loc, env, denv, c1, c2) =>
adamc@209 609 case D.prove env denv (c1, c2, loc) of
adamc@209 610 [] => true
adamc@209 611 | _ => false) gs
adamc@209 612 end
adamc@12 613 handle CUnify _ => false
adamc@12 614
adamc@80 615 and consNeq env (c1, c2) =
adamc@86 616 case (#1 (ElabOps.hnormCon env c1), #1 (ElabOps.hnormCon env c2)) of
adamc@80 617 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@80 618 | _ => false
adamc@80 619
adamc@86 620 and unifySummaries (env, denv) (k, s1 : record_summary, s2 : record_summary) =
adamc@12 621 let
adamc@223 622 val loc = #2 k
adamc@14 623 (*val () = eprefaces "Summaries" [("#1", p_summary env s1),
adamc@223 624 ("#2", p_summary env s2)]*)
adamc@12 625
adamc@12 626 fun eatMatching p (ls1, ls2) =
adamc@12 627 let
adamc@12 628 fun em (ls1, ls2, passed1) =
adamc@12 629 case ls1 of
adamc@12 630 [] => (rev passed1, ls2)
adamc@12 631 | h1 :: t1 =>
adamc@12 632 let
adamc@12 633 fun search (ls2', passed2) =
adamc@12 634 case ls2' of
adamc@12 635 [] => em (t1, ls2, h1 :: passed1)
adamc@12 636 | h2 :: t2 =>
adamc@12 637 if p (h1, h2) then
adamc@12 638 em (t1, List.revAppend (passed2, t2), passed1)
adamc@12 639 else
adamc@12 640 search (t2, h2 :: passed2)
adamc@12 641 in
adamc@12 642 search (ls2, [])
adamc@12 643 end
adamc@12 644 in
adamc@12 645 em (ls1, ls2, [])
adamc@12 646 end
adamc@12 647
adamc@12 648 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@80 649 not (consNeq env (x1, x2))
adamc@86 650 andalso consEq (env, denv) (c1, c2)
adamc@86 651 andalso consEq (env, denv) (x1, x2))
adamc@79 652 (#fields s1, #fields s2)
adamc@14 653 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@223 654 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@12 655 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@86 656 val (others1, others2) = eatMatching (consEq (env, denv)) (#others s1, #others s2)
adamc@223 657 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@223 658 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@12 659
adamc@12 660 fun unifFields (fs, others, unifs) =
adamc@12 661 case (fs, others, unifs) of
adamc@12 662 ([], [], _) => ([], [], unifs)
adamc@12 663 | (_, _, []) => (fs, others, [])
adamc@12 664 | (_, _, (_, r) :: rest) =>
adamc@12 665 let
adamc@12 666 val r' = ref NONE
adamc@141 667 val kr = (L'.KRecord k, dummy)
adamc@141 668 val cr' = (L'.CUnif (dummy, kr, "recd", r'), dummy)
adamc@12 669
adamc@12 670 val prefix = case (fs, others) of
adamc@12 671 ([], other :: others) =>
adamc@12 672 List.foldl (fn (other, c) =>
adamc@12 673 (L'.CConcat (c, other), dummy))
adamc@12 674 other others
adamc@12 675 | (fs, []) =>
adamc@12 676 (L'.CRecord (k, fs), dummy)
adamc@12 677 | (fs, others) =>
adamc@12 678 List.foldl (fn (other, c) =>
adamc@12 679 (L'.CConcat (c, other), dummy))
adamc@12 680 (L'.CRecord (k, fs), dummy) others
adamc@12 681 in
adamc@12 682 r := SOME (L'.CConcat (prefix, cr'), dummy);
adamc@12 683 ([], [], (cr', r') :: rest)
adamc@12 684 end
adamc@12 685
adamc@12 686 val (fs1, others1, unifs2) = unifFields (fs1, others1, unifs2)
adamc@12 687 val (fs2, others2, unifs1) = unifFields (fs2, others2, unifs1)
adamc@12 688
adamc@223 689 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@223 690 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@223 691
adamc@223 692 fun isGuessable (other, fs) =
adamc@223 693 let
adamc@223 694 val gs = guessFold (env, denv) (other, (L'.CRecord (k, fs), loc), [], SummaryFailure)
adamc@223 695 in
adamc@223 696 List.all (fn (loc, env, denv, c1, c2) =>
adamc@223 697 case D.prove env denv (c1, c2, loc) of
adamc@223 698 [] => true
adamc@223 699 | _ => false) gs
adamc@223 700 end
adamc@223 701 handle SummaryFailure => false
adamc@223 702
adamc@223 703 val (fs1, fs2, others1, others2) =
adamc@223 704 case (fs1, fs2, others1, others2) of
adamc@223 705 ([], _, [other1], []) =>
adamc@223 706 if isGuessable (other1, fs2) then
adamc@223 707 ([], [], [], [])
adamc@223 708 else
adamc@223 709 (fs1, fs2, others1, others2)
adamc@223 710 | _ => (fs1, fs2, others1, others2)
adamc@223 711
adamc@223 712 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@223 713 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@223 714
adamc@86 715 val clear = case (fs1, others1, fs2, others2) of
adamc@86 716 ([], [], [], []) => true
adamc@12 717 | _ => false
adamc@12 718 val empty = (L'.CRecord (k, []), dummy)
adamc@223 719
adamc@329 720 fun unsummarize {fields, unifs, others} =
adamc@329 721 let
adamc@329 722 val c = (L'.CRecord (k, fields), loc)
adamc@329 723
adamc@329 724 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@329 725 c unifs
adamc@329 726 in
adamc@329 727 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@329 728 c others
adamc@329 729 end
adamc@329 730
adamc@12 731 fun pairOffUnifs (unifs1, unifs2) =
adamc@12 732 case (unifs1, unifs2) of
adamc@12 733 ([], _) =>
adamc@86 734 if clear then
adamc@12 735 List.app (fn (_, r) => r := SOME empty) unifs2
adamc@12 736 else
adamc@329 737 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@12 738 | (_, []) =>
adamc@86 739 if clear then
adamc@12 740 List.app (fn (_, r) => r := SOME empty) unifs1
adamc@12 741 else
adamc@329 742 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@12 743 | ((c1, _) :: rest1, (_, r2) :: rest2) =>
adamc@12 744 (r2 := SOME c1;
adamc@12 745 pairOffUnifs (rest1, rest2))
adamc@12 746 in
adamc@12 747 pairOffUnifs (unifs1, unifs2)
adamc@223 748 (*before eprefaces "Summaries'" [("#1", p_summary env s1),
adamc@223 749 ("#2", p_summary env s2)]*)
adamc@223 750 end
adamc@223 751
adamc@223 752 and guessFold (env, denv) (c1, c2, gs, ex) =
adamc@223 753 let
adamc@223 754 val loc = #2 c1
adamc@223 755
adamc@223 756 fun unfold (dom, ran, f, i, r, c) =
adamc@223 757 let
adamc@223 758 val nm = cunif (loc, (L'.KName, loc))
adamc@223 759 val v = cunif (loc, dom)
adamc@223 760 val rest = cunif (loc, (L'.KRecord dom, loc))
adamc@223 761 val acc = (L'.CFold (dom, ran), loc)
adamc@223 762 val acc = (L'.CApp (acc, f), loc)
adamc@223 763 val acc = (L'.CApp (acc, i), loc)
adamc@223 764 val acc = (L'.CApp (acc, rest), loc)
adamc@223 765
adamc@223 766 val (iS, gs3) = summarizeCon (env, denv) i
adamc@223 767
adamc@223 768 val app = (L'.CApp (f, nm), loc)
adamc@223 769 val app = (L'.CApp (app, v), loc)
adamc@223 770 val app = (L'.CApp (app, acc), loc)
adamc@223 771 val (appS, gs4) = summarizeCon (env, denv) app
adamc@223 772
adamc@223 773 val (cS, gs5) = summarizeCon (env, denv) c
adamc@223 774 in
adamc@223 775 (*prefaces "Summaries" [("iS", p_con_summary iS),
adamc@223 776 ("appS", p_con_summary appS),
adamc@223 777 ("cS", p_con_summary cS)];*)
adamc@223 778
adamc@223 779 if compatible (iS, appS) then
adamc@223 780 raise ex
adamc@223 781 else if compatible (cS, iS) then
adamc@223 782 let
adamc@223 783 (*val () = prefaces "Same?" [("i", p_con env i),
adamc@223 784 ("c", p_con env c)]*)
adamc@223 785 val gs6 = unifyCons (env, denv) i c
adamc@223 786 (*val () = TextIO.print "Yes!\n"*)
adamc@223 787
adamc@223 788 val gs7 = unifyCons (env, denv) r (L'.CRecord (dom, []), loc)
adamc@223 789 in
adamc@223 790 gs @ gs3 @ gs5 @ gs6 @ gs7
adamc@223 791 end
adamc@223 792 else if compatible (cS, appS) then
adamc@223 793 let
adamc@223 794 (*val () = prefaces "Same?" [("app", p_con env app),
adamc@223 795 ("c", p_con env c),
adamc@223 796 ("app'", p_con env (#1 (hnormCon (env, denv) app)))]*)
adamc@223 797 val gs6 = unifyCons (env, denv) app c
adamc@223 798 (*val () = TextIO.print "Yes!\n"*)
adamc@223 799
adamc@223 800 val singleton = (L'.CRecord (dom, [(nm, v)]), loc)
adamc@223 801 val concat = (L'.CConcat (singleton, rest), loc)
adamc@223 802 (*val () = prefaces "Pre-crew" [("r", p_con env r),
adamc@223 803 ("concat", p_con env concat)]*)
adamc@223 804 val gs7 = unifyCons (env, denv) r concat
adamc@223 805 in
adamc@223 806 (*prefaces "The crew" [("nm", p_con env nm),
adamc@223 807 ("v", p_con env v),
adamc@223 808 ("rest", p_con env rest)];*)
adamc@223 809
adamc@223 810 gs @ gs3 @ gs4 @ gs5 @ gs6 @ gs7
adamc@223 811 end
adamc@223 812 else
adamc@223 813 raise ex
adamc@223 814 end
adamc@223 815 handle _ => raise ex
adamc@223 816 in
adamc@223 817 case (#1 c1, #1 c2) of
adamc@223 818 (L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r), _) =>
adamc@223 819 unfold (dom, ran, f, i, r, c2)
adamc@223 820 | (_, L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, ran), _), f), _), i), _), r)) =>
adamc@223 821 unfold (dom, ran, f, i, r, c1)
adamc@223 822 | _ => raise ex
adamc@12 823 end
adamc@12 824
adamc@86 825 and unifyCons' (env, denv) c1 c2 =
adamc@326 826 case (#1 c1, #1 c2) of
adamc@334 827 (L'.TDisjoint (_, x1, y1, t1), L'.TDisjoint (_, x2, y2, t2)) =>
adamc@205 828 let
adamc@326 829 val gs1 = unifyCons' (env, denv) x1 x2
adamc@326 830 val gs2 = unifyCons' (env, denv) y1 y2
adamc@326 831 val (denv', gs3) = D.assert env denv (x1, y1)
adamc@326 832 val gs4 = unifyCons' (env, denv') t1 t2
adamc@205 833 in
adamc@326 834 gs1 @ gs2 @ gs3 @ gs4
adamc@205 835 end
adamc@326 836 | _ =>
adamc@326 837 let
adamc@326 838 val (c1, gs1) = hnormCon (env, denv) c1
adamc@326 839 val (c2, gs2) = hnormCon (env, denv) c2
adamc@326 840 in
adamc@326 841 let
adamc@326 842 val gs3 = unifyCons'' (env, denv) c1 c2
adamc@326 843 in
adamc@326 844 gs1 @ gs2 @ gs3
adamc@326 845 end
adamc@326 846 handle ex => guessFold (env, denv) (c1, c2, gs1 @ gs2, ex)
adamc@326 847 end
adamc@11 848
adamc@205 849 and unifyCons'' (env, denv) (c1All as (c1, loc)) (c2All as (c2, _)) =
adamc@10 850 let
adamc@210 851 fun err f = raise CUnify' (f (c1All, c2All))
adamc@12 852
adamc@86 853 fun isRecord () = unifyRecordCons (env, denv) (c1All, c2All)
adamc@10 854 in
adamc@92 855 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@92 856 ("c2All", p_con env c2All)];*)
adamc@92 857
adamc@10 858 case (c1, c2) of
adamc@88 859 (L'.CUnit, L'.CUnit) => []
adamc@88 860
adamc@88 861 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@86 862 unifyCons' (env, denv) d1 d2
adamc@86 863 @ unifyCons' (env, denv) r1 r2
adamc@10 864 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@10 865 if expl1 <> expl2 then
adamc@10 866 err CExplicitness
adamc@10 867 else
adamc@10 868 (unifyKinds d1 d2;
adamc@86 869 unifyCons' (E.pushCRel env x1 d1, D.enter denv) r1 r2)
adamc@86 870 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' (env, denv) r1 r2
adamc@10 871
adamc@10 872 | (L'.CRel n1, L'.CRel n2) =>
adamc@10 873 if n1 = n2 then
adamc@86 874 []
adamc@10 875 else
adamc@10 876 err CIncompatible
adamc@10 877 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@10 878 if n1 = n2 then
adamc@86 879 []
adamc@10 880 else
adamc@10 881 err CIncompatible
adamc@10 882
adamc@10 883 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@86 884 (unifyCons' (env, denv) d1 d2;
adamc@86 885 unifyCons' (env, denv) r1 r2)
adamc@10 886 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@10 887 (unifyKinds k1 k2;
adamc@86 888 unifyCons' (E.pushCRel env x1 k1, D.enter denv) c1 c2)
adamc@10 889
adamc@10 890 | (L'.CName n1, L'.CName n2) =>
adamc@10 891 if n1 = n2 then
adamc@86 892 []
adamc@10 893 else
adamc@10 894 err CIncompatible
adamc@10 895
adamc@34 896 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@34 897 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@86 898 []
adamc@34 899 else
adamc@34 900 err CIncompatible
adamc@34 901
adamc@207 902 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@207 903 ((ListPair.foldlEq (fn (c1, c2, gs) =>
adamc@207 904 let
adamc@207 905 val gs' = unifyCons' (env, denv) c1 c2
adamc@207 906 in
adamc@207 907 gs' @ gs
adamc@207 908 end) [] (cs1, cs2))
adamc@207 909 handle ListPair.UnequalLengths => err CIncompatible)
adamc@207 910 | (L'.CProj (c1, n1), L'.CProj (c2, n2)) =>
adamc@207 911 if n1 = n2 then
adamc@207 912 unifyCons' (env, denv) c1 c2
adamc@207 913 else
adamc@207 914 err CIncompatible
adamc@207 915
adamc@86 916 | (L'.CError, _) => []
adamc@86 917 | (_, L'.CError) => []
adamc@10 918
adamc@92 919 | (L'.CRecord _, _) => isRecord ()
adamc@92 920 | (_, L'.CRecord _) => isRecord ()
adamc@92 921 | (L'.CConcat _, _) => isRecord ()
adamc@92 922 | (_, L'.CConcat _) => isRecord ()
adamc@10 923
adamc@76 924 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@10 925 if r1 = r2 then
adamc@86 926 []
adamc@10 927 else
adamc@10 928 (unifyKinds k1 k2;
adamc@86 929 r1 := SOME c2All;
adamc@86 930 [])
adamc@10 931
adamc@76 932 | (L'.CUnif (_, _, _, r), _) =>
adamc@10 933 if occursCon r c2All then
adamc@10 934 err COccursCheckFailed
adamc@10 935 else
adamc@86 936 (r := SOME c2All;
adamc@86 937 [])
adamc@76 938 | (_, L'.CUnif (_, _, _, r)) =>
adamc@10 939 if occursCon r c1All then
adamc@10 940 err COccursCheckFailed
adamc@10 941 else
adamc@86 942 (r := SOME c1All;
adamc@86 943 [])
adamc@10 944
adamc@71 945 | (L'.CFold (dom1, ran1), L'.CFold (dom2, ran2)) =>
adamc@71 946 (unifyKinds dom1 dom2;
adamc@86 947 unifyKinds ran1 ran2;
adamc@86 948 [])
adamc@71 949
adamc@10 950 | _ => err CIncompatible
adamc@10 951 end
adamc@10 952
adamc@86 953 and unifyCons (env, denv) c1 c2 =
adamc@86 954 unifyCons' (env, denv) c1 c2
adamc@10 955 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@10 956 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@210 957
adamc@86 958 fun checkCon (env, denv) e c1 c2 =
adamc@86 959 unifyCons (env, denv) c1 c2
adamc@10 960 handle CUnify (c1, c2, err) =>
adamc@86 961 (expError env (Unify (e, c1, c2, err));
adamc@86 962 [])
adamc@10 963
adamc@171 964 fun checkPatCon (env, denv) p c1 c2 =
adamc@171 965 unifyCons (env, denv) c1 c2
adamc@171 966 handle CUnify (c1, c2, err) =>
adamc@171 967 (expError env (PatUnify (p, c1, c2, err));
adamc@171 968 [])
adamc@171 969
adamc@14 970 fun primType env p =
adamc@56 971 case p of
adamc@56 972 P.Int _ => !int
adamc@56 973 | P.Float _ => !float
adamc@56 974 | P.String _ => !string
adamc@14 975
adamc@71 976 fun recCons (k, nm, v, rest, loc) =
adamc@71 977 (L'.CConcat ((L'.CRecord (k, [(nm, v)]), loc),
adamc@71 978 rest), loc)
adamc@71 979
adamc@71 980 fun foldType (dom, loc) =
adamc@71 981 (L'.TCFun (L'.Explicit, "ran", (L'.KArrow ((L'.KRecord dom, loc), (L'.KType, loc)), loc),
adamc@71 982 (L'.TFun ((L'.TCFun (L'.Explicit, "nm", (L'.KName, loc),
adamc@71 983 (L'.TCFun (L'.Explicit, "v", dom,
adamc@71 984 (L'.TCFun (L'.Explicit, "rest", (L'.KRecord dom, loc),
adamc@71 985 (L'.TFun ((L'.CApp ((L'.CRel 3, loc), (L'.CRel 0, loc)), loc),
adamc@334 986 (L'.TDisjoint (L'.Instantiate,
adamc@334 987 (L'.CRecord
adamc@326 988 ((L'.KUnit, loc),
adamc@326 989 [((L'.CRel 2, loc),
adamc@326 990 (L'.CUnit, loc))]), loc),
adamc@326 991 (L'.CRel 0, loc),
adamc@326 992 (L'.CApp ((L'.CRel 3, loc),
adamc@326 993 recCons (dom,
adamc@326 994 (L'.CRel 2, loc),
adamc@326 995 (L'.CRel 1, loc),
adamc@326 996 (L'.CRel 0, loc),
adamc@326 997 loc)), loc)),
adamc@326 998 loc)), loc)),
adamc@71 999 loc)), loc)), loc),
adamc@71 1000 (L'.TFun ((L'.CApp ((L'.CRel 0, loc), (L'.CRecord (dom, []), loc)), loc),
adamc@71 1001 (L'.TCFun (L'.Explicit, "r", (L'.KRecord dom, loc),
adamc@71 1002 (L'.CApp ((L'.CRel 1, loc), (L'.CRel 0, loc)), loc)), loc)),
adamc@71 1003 loc)), loc)), loc)
adamc@71 1004
adamc@228 1005 datatype constraint =
adamc@228 1006 Disjoint of D.goal
adamc@228 1007 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@228 1008
adamc@228 1009 val enD = map Disjoint
adamc@228 1010
adamc@86 1011 fun elabHead (env, denv) (e as (_, loc)) t =
adamc@15 1012 let
adamc@15 1013 fun unravel (t, e) =
adamc@86 1014 let
adamc@86 1015 val (t, gs) = hnormCon (env, denv) t
adamc@86 1016 in
adamc@86 1017 case t of
adamc@86 1018 (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@86 1019 let
adamc@86 1020 val u = cunif (loc, k)
adamc@86 1021
adamc@339 1022 val t'' = subConInCon (0, u) t'
adamc@339 1023 val (e, t, gs') = unravel (t'', (L'.ECApp (e, u), loc))
adamc@86 1024 in
adamc@339 1025 (*prefaces "Unravel" [("t'", p_con env t'),
adamc@339 1026 ("t''", p_con env t'')];*)
adamc@228 1027 (e, t, enD gs @ gs')
adamc@86 1028 end
adamc@228 1029 | _ => (e, t, enD gs)
adamc@86 1030 end
adamc@15 1031 in
adamc@15 1032 unravel (t, e)
adamc@15 1033 end
adamc@15 1034
adamc@174 1035 fun elabPat (pAll as (p, loc), (env, denv, bound)) =
adamc@171 1036 let
adamc@171 1037 val perror = (L'.PWild, loc)
adamc@171 1038 val terror = (L'.CError, loc)
adamc@171 1039 val pterror = (perror, terror)
adamc@171 1040 val rerror = (pterror, (env, bound))
adamc@171 1041
adamc@191 1042 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1043 case (po, to) of
adamc@188 1044 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1045 rerror)
adamc@188 1046 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1047 rerror)
adamc@191 1048 | (NONE, NONE) =>
adamc@191 1049 let
adamc@191 1050 val k = (L'.KType, loc)
adamc@191 1051 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1052 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1053 in
adamc@191 1054 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1055 (env, bound))
adamc@191 1056 end
adamc@188 1057 | (SOME p, SOME t) =>
adamc@188 1058 let
adamc@188 1059 val ((p', pt), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@191 1060
adamc@191 1061 val k = (L'.KType, loc)
adamc@191 1062 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1063 val nxs = length unifs - 1
adamc@194 1064 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1065 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1066 in
adamc@191 1067 ignore (checkPatCon (env, denv) p' pt t);
adamc@191 1068 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1069 (env, bound))
adamc@188 1070 end
adamc@171 1071 in
adamc@171 1072 case p of
adamc@171 1073 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1074 (env, bound))
adamc@171 1075 | L.PVar x =>
adamc@171 1076 let
adamc@171 1077 val t = if SS.member (bound, x) then
adamc@171 1078 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1079 terror)
adamc@171 1080 else
adamc@171 1081 cunif (loc, (L'.KType, loc))
adamc@171 1082 in
adamc@182 1083 (((L'.PVar (x, t), loc), t),
adamc@171 1084 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1085 end
adamc@173 1086 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1087 (env, bound))
adamc@171 1088 | L.PCon ([], x, po) =>
adamc@171 1089 (case E.lookupConstructor env x of
adamc@174 1090 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1091 rerror)
adamc@191 1092 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1093 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1094 (case E.lookupStr env m1 of
adamc@174 1095 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1096 rerror)
adamc@174 1097 | SOME (n, sgn) =>
adamc@174 1098 let
adamc@174 1099 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1100 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1101 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1102 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1103 ((L'.StrVar n, loc), sgn) ms
adamc@174 1104 in
adamc@174 1105 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1106 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1107 rerror)
adamc@191 1108 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1109 end)
adamc@174 1110
adamc@175 1111 | L.PRecord (xps, flex) =>
adamc@175 1112 let
adamc@175 1113 val (xpts, (env, bound, _)) =
adamc@175 1114 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1115 let
adamc@175 1116 val ((p', t), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@175 1117 in
adamc@175 1118 if SS.member (fbound, x) then
adamc@175 1119 expError env (DuplicatePatField (loc, x))
adamc@175 1120 else
adamc@175 1121 ();
adamc@175 1122 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1123 end)
adamc@175 1124 (env, bound, SS.empty) xps
adamc@175 1125
adamc@175 1126 val k = (L'.KType, loc)
adamc@175 1127 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1128 val c =
adamc@175 1129 if flex then
adamc@176 1130 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1131 else
adamc@176 1132 c
adamc@175 1133 in
adamc@182 1134 (((L'.PRecord xpts, loc),
adamc@175 1135 (L'.TRecord c, loc)),
adamc@175 1136 (env, bound))
adamc@175 1137 end
adamc@175 1138
adamc@171 1139 end
adamc@171 1140
adamc@172 1141 datatype coverage =
adamc@172 1142 Wild
adamc@173 1143 | None
adamc@172 1144 | Datatype of coverage IM.map
adamc@175 1145 | Record of coverage SM.map list
adamc@172 1146
adamc@243 1147 fun c2s c =
adamc@243 1148 case c of
adamc@243 1149 Wild => "Wild"
adamc@243 1150 | None => "None"
adamc@243 1151 | Datatype _ => "Datatype"
adamc@243 1152 | Record _ => "Record"
adamc@243 1153
adamc@172 1154 fun exhaustive (env, denv, t, ps) =
adamc@172 1155 let
adamc@172 1156 fun pcCoverage pc =
adamc@172 1157 case pc of
adamc@172 1158 L'.PConVar n => n
adamc@174 1159 | L'.PConProj (m1, ms, x) =>
adamc@174 1160 let
adamc@174 1161 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1162 in
adamc@174 1163 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1164 NONE => raise Fail "exhaustive: Can't project constructor"
adamc@191 1165 | SOME (_, n, _, _, _) => n
adamc@174 1166 end
adamc@172 1167
adamc@172 1168 fun coverage (p, _) =
adamc@172 1169 case p of
adamc@172 1170 L'.PWild => Wild
adamc@172 1171 | L'.PVar _ => Wild
adamc@173 1172 | L'.PPrim _ => None
adamc@191 1173 | L'.PCon (_, pc, _, NONE) => Datatype (IM.insert (IM.empty, pcCoverage pc, Wild))
adamc@191 1174 | L'.PCon (_, pc, _, SOME p) => Datatype (IM.insert (IM.empty, pcCoverage pc, coverage p))
adamc@182 1175 | L'.PRecord xps => Record [foldl (fn ((x, p, _), fmap) =>
adamc@182 1176 SM.insert (fmap, x, coverage p)) SM.empty xps]
adamc@176 1177
adamc@172 1178 fun merge (c1, c2) =
adamc@172 1179 case (c1, c2) of
adamc@173 1180 (None, _) => c2
adamc@173 1181 | (_, None) => c1
adamc@173 1182
adamc@173 1183 | (Wild, _) => Wild
adamc@172 1184 | (_, Wild) => Wild
adamc@172 1185
adamc@172 1186 | (Datatype cm1, Datatype cm2) => Datatype (IM.unionWith merge (cm1, cm2))
adamc@172 1187
adamc@175 1188 | (Record fm1, Record fm2) => Record (fm1 @ fm2)
adamc@175 1189
adamc@175 1190 | _ => None
adamc@175 1191
adamc@172 1192 fun combinedCoverage ps =
adamc@172 1193 case ps of
adamc@172 1194 [] => raise Fail "Empty pattern list for coverage checking"
adamc@172 1195 | [p] => coverage p
adamc@172 1196 | p :: ps => merge (coverage p, combinedCoverage ps)
adamc@172 1197
adamc@175 1198 fun enumerateCases t =
adamc@175 1199 let
adamc@175 1200 fun dtype cons =
adamc@175 1201 ListUtil.mapConcat (fn (_, n, to) =>
adamc@175 1202 case to of
adamc@175 1203 NONE => [Datatype (IM.insert (IM.empty, n, Wild))]
adamc@175 1204 | SOME t => map (fn c => Datatype (IM.insert (IM.empty, n, c)))
adamc@175 1205 (enumerateCases t)) cons
adamc@175 1206 in
adamc@175 1207 case #1 (#1 (hnormCon (env, denv) t)) of
adamc@175 1208 L'.CNamed n =>
adamc@175 1209 (let
adamc@175 1210 val dt = E.lookupDatatype env n
adamc@175 1211 val cons = E.constructors dt
adamc@175 1212 in
adamc@175 1213 dtype cons
adamc@175 1214 end handle E.UnboundNamed _ => [Wild])
adamc@175 1215 | L'.TRecord c =>
adamc@175 1216 (case #1 (#1 (hnormCon (env, denv) c)) of
adamc@175 1217 L'.CRecord (_, xts) =>
adamc@175 1218 let
adamc@175 1219 val xts = map (fn (x, t) => (#1 (hnormCon (env, denv) x), t)) xts
adamc@175 1220
adamc@175 1221 fun exponentiate fs =
adamc@175 1222 case fs of
adamc@175 1223 [] => [SM.empty]
adamc@175 1224 | ((L'.CName x, _), t) :: rest =>
adamc@175 1225 let
adamc@175 1226 val this = enumerateCases t
adamc@175 1227 val rest = exponentiate rest
adamc@175 1228 in
adamc@175 1229 ListUtil.mapConcat (fn fmap =>
adamc@175 1230 map (fn c => SM.insert (fmap, x, c)) this) rest
adamc@175 1231 end
adamc@175 1232 | _ => raise Fail "exponentiate: Not CName"
adamc@175 1233 in
adamc@175 1234 if List.exists (fn ((L'.CName _, _), _) => false
adamc@175 1235 | (c, _) => true) xts then
adamc@175 1236 [Wild]
adamc@175 1237 else
adamc@175 1238 map (fn ls => Record [ls]) (exponentiate xts)
adamc@175 1239 end
adamc@175 1240 | _ => [Wild])
adamc@175 1241 | _ => [Wild]
adamc@175 1242 end
adamc@175 1243
adamc@175 1244 fun coverageImp (c1, c2) =
adamc@243 1245 let
adamc@243 1246 val r =
adamc@243 1247 case (c1, c2) of
adamc@243 1248 (Wild, _) => true
adamc@243 1249
adamc@243 1250 | (Datatype cmap1, Datatype cmap2) =>
adamc@243 1251 List.all (fn (n, c2) =>
adamc@243 1252 case IM.find (cmap1, n) of
adamc@243 1253 NONE => false
adamc@243 1254 | SOME c1 => coverageImp (c1, c2)) (IM.listItemsi cmap2)
adamc@243 1255 | (Datatype cmap1, Wild) =>
adamc@243 1256 List.all (fn (n, c1) => coverageImp (c1, Wild)) (IM.listItemsi cmap1)
adamc@243 1257
adamc@243 1258 | (Record fmaps1, Record fmaps2) =>
adamc@243 1259 List.all (fn fmap2 =>
adamc@243 1260 List.exists (fn fmap1 =>
adamc@243 1261 List.all (fn (x, c2) =>
adamc@243 1262 case SM.find (fmap1, x) of
adamc@243 1263 NONE => true
adamc@243 1264 | SOME c1 => coverageImp (c1, c2))
adamc@243 1265 (SM.listItemsi fmap2))
adamc@243 1266 fmaps1) fmaps2
adamc@243 1267
adamc@243 1268 | (Record fmaps1, Wild) =>
adamc@243 1269 List.exists (fn fmap1 =>
adamc@243 1270 List.all (fn (x, c1) => coverageImp (c1, Wild))
adamc@243 1271 (SM.listItemsi fmap1)) fmaps1
adamc@243 1272
adamc@243 1273 | _ => false
adamc@243 1274 in
adamc@243 1275 (*TextIO.print ("coverageImp(" ^ c2s c1 ^ ", " ^ c2s c2 ^ ") = " ^ Bool.toString r ^ "\n");*)
adamc@243 1276 r
adamc@243 1277 end
adamc@175 1278
adamc@172 1279 fun isTotal (c, t) =
adamc@172 1280 case c of
adamc@173 1281 None => (false, [])
adamc@173 1282 | Wild => (true, [])
adamc@172 1283 | Datatype cm =>
adamc@172 1284 let
adamc@172 1285 val ((t, _), gs) = hnormCon (env, denv) t
adamc@174 1286
adamc@174 1287 fun dtype cons =
adamc@174 1288 foldl (fn ((_, n, to), (total, gs)) =>
adamc@174 1289 case IM.find (cm, n) of
adamc@174 1290 NONE => (false, gs)
adamc@174 1291 | SOME c' =>
adamc@174 1292 case to of
adamc@174 1293 NONE => (total, gs)
adamc@174 1294 | SOME t' =>
adamc@174 1295 let
adamc@174 1296 val (total, gs') = isTotal (c', t')
adamc@174 1297 in
adamc@174 1298 (total, gs' @ gs)
adamc@174 1299 end)
adamc@174 1300 (true, gs) cons
adamc@191 1301
adamc@191 1302 fun unapp t =
adamc@191 1303 case t of
adamc@191 1304 L'.CApp ((t, _), _) => unapp t
adamc@191 1305 | _ => t
adamc@172 1306 in
adamc@191 1307 case unapp t of
adamc@172 1308 L'.CNamed n =>
adamc@172 1309 let
adamc@172 1310 val dt = E.lookupDatatype env n
adamc@172 1311 val cons = E.constructors dt
adamc@172 1312 in
adamc@174 1313 dtype cons
adamc@174 1314 end
adamc@174 1315 | L'.CModProj (m1, ms, x) =>
adamc@174 1316 let
adamc@174 1317 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1318 in
adamc@174 1319 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@174 1320 NONE => raise Fail "isTotal: Can't project datatype"
adamc@191 1321 | SOME (_, cons) => dtype cons
adamc@172 1322 end
adamc@172 1323 | L'.CError => (true, gs)
adamc@341 1324 | c =>
adamc@341 1325 (prefaces "Not a datatype" [("c", p_con env (c, ErrorMsg.dummySpan))];
adamc@341 1326 raise Fail "isTotal: Not a datatype")
adamc@172 1327 end
adamc@175 1328 | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases t), [])
adamc@172 1329 in
adamc@172 1330 isTotal (combinedCoverage ps, t)
adamc@172 1331 end
adamc@172 1332
adamc@217 1333 fun unmodCon env (c, loc) =
adamc@217 1334 case c of
adamc@217 1335 L'.CNamed n =>
adamc@217 1336 (case E.lookupCNamed env n of
adamc@217 1337 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1338 | _ => (c, loc))
adamc@217 1339 | L'.CModProj (m1, ms, x) =>
adamc@217 1340 let
adamc@217 1341 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1342 in
adamc@217 1343 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1344 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1345 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1346 | _ => (c, loc)
adamc@217 1347 end
adamc@217 1348 | _ => (c, loc)
adamc@217 1349
adamc@217 1350 fun normClassConstraint envs (c, loc) =
adamc@217 1351 case c of
adamc@217 1352 L'.CApp (f, x) =>
adamc@217 1353 let
adamc@217 1354 val f = unmodCon (#1 envs) f
adamc@217 1355 val (x, gs) = hnormCon envs x
adamc@217 1356 in
adamc@217 1357 ((L'.CApp (f, x), loc), gs)
adamc@217 1358 end
adamc@217 1359 | _ => ((c, loc), [])
adamc@216 1360
adamc@92 1361 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1362 let
adamc@280 1363 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@280 1364
adamc@280 1365 val r = case e of
adamc@91 1366 L.EAnnot (e, t) =>
adamc@91 1367 let
adamc@91 1368 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1369 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1370 val gs3 = checkCon (env, denv) e' et t'
adamc@91 1371 in
adamc@228 1372 (e', t', gs1 @ enD gs2 @ enD gs3)
adamc@91 1373 end
adamc@34 1374
adamc@91 1375 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@91 1376 | L.EVar ([], s) =>
adamc@91 1377 (case E.lookupE env s of
adamc@91 1378 E.NotBound =>
adamc@91 1379 (expError env (UnboundExp (loc, s));
adamc@91 1380 (eerror, cerror, []))
adamc@91 1381 | E.Rel (n, t) => ((L'.ERel n, loc), t, [])
adamc@191 1382 | E.Named (n, t) =>
adamc@191 1383 if Char.isUpper (String.sub (s, 0)) then
adamc@191 1384 elabHead (env, denv) (L'.ENamed n, loc) t
adamc@191 1385 else
adamc@191 1386 ((L'.ENamed n, loc), t, []))
adamc@91 1387 | L.EVar (m1 :: ms, s) =>
adamc@91 1388 (case E.lookupStr env m1 of
adamc@91 1389 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1390 (eerror, cerror, []))
adamc@91 1391 | SOME (n, sgn) =>
adamc@91 1392 let
adamc@91 1393 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1394 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1395 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1396 (strerror, sgnerror))
adamc@91 1397 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1398 ((L'.StrVar n, loc), sgn) ms
adamc@10 1399
adamc@91 1400 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1401 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1402 cerror)
adamc@91 1403 | SOME t => t
adamc@91 1404 in
adamc@91 1405 ((L'.EModProj (n, ms, s), loc), t, [])
adamc@91 1406 end)
adamc@86 1407
adamc@211 1408 | L.EApp (e1, (L.EWild, _)) =>
adamc@210 1409 let
adamc@210 1410 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@210 1411 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@210 1412 val (t1, gs3) = hnormCon (env, denv) t1
adamc@210 1413 in
adamc@210 1414 case t1 of
adamc@211 1415 (L'.TFun (dom, ran), _) =>
adamc@216 1416 let
adamc@216 1417 val (dom, gs4) = normClassConstraint (env, denv) dom
adamc@216 1418 in
adamc@216 1419 case E.resolveClass env dom of
adamc@228 1420 NONE =>
adamc@228 1421 let
adamc@228 1422 val r = ref NONE
adamc@228 1423 in
adamc@233 1424 ((L'.EApp (e1', (L'.EUnif r, loc)), loc),
adamc@233 1425 ran, [TypeClass (env, dom, r, loc)])
adamc@228 1426 end
adamc@228 1427 | SOME pf => ((L'.EApp (e1', pf), loc), ran, gs1 @ gs2 @ enD gs3 @ enD gs4)
adamc@216 1428 end
adamc@220 1429 | _ => (expError env (OutOfContext (loc, SOME (e1', t1)));
adamc@211 1430 (eerror, cerror, []))
adamc@210 1431 end
adamc@220 1432 | L.EWild => (expError env (OutOfContext (loc, NONE));
adamc@211 1433 (eerror, cerror, []))
adamc@210 1434
adamc@91 1435 | L.EApp (e1, e2) =>
adamc@91 1436 let
adamc@91 1437 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@91 1438 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@91 1439 val (e2', t2, gs3) = elabExp (env, denv) e2
adamc@71 1440
adamc@91 1441 val dom = cunif (loc, ktype)
adamc@91 1442 val ran = cunif (loc, ktype)
adamc@91 1443 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1444
adamc@91 1445 val gs4 = checkCon (env, denv) e1' t1 t
adamc@91 1446 val gs5 = checkCon (env, denv) e2' t2 dom
adamc@205 1447
adamc@228 1448 val gs = gs1 @ gs2 @ gs3 @ enD gs4 @ enD gs5
adamc@91 1449 in
adamc@205 1450 ((L'.EApp (e1', e2'), loc), ran, gs)
adamc@91 1451 end
adamc@91 1452 | L.EAbs (x, to, e) =>
adamc@91 1453 let
adamc@91 1454 val (t', gs1) = case to of
adamc@91 1455 NONE => (cunif (loc, ktype), [])
adamc@91 1456 | SOME t =>
adamc@91 1457 let
adamc@91 1458 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1459 in
adamc@91 1460 checkKind env t' tk ktype;
adamc@91 1461 (t', gs)
adamc@91 1462 end
adamc@256 1463 val (dom, gs2) = normClassConstraint (env, denv) t'
adamc@256 1464 val (e', et, gs3) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1465 in
adamc@91 1466 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1467 (L'.TFun (t', et), loc),
adamc@256 1468 enD gs1 @ enD gs2 @ gs3)
adamc@91 1469 end
adamc@91 1470 | L.ECApp (e, c) =>
adamc@91 1471 let
adamc@91 1472 val (e', et, gs1) = elabExp (env, denv) e
adamc@328 1473 val oldEt = et
adamc@91 1474 val (e', et, gs2) = elabHead (env, denv) e' et
adamc@91 1475 val (c', ck, gs3) = elabCon (env, denv) c
adamc@91 1476 val ((et', _), gs4) = hnormCon (env, denv) et
adamc@91 1477 in
adamc@91 1478 case et' of
adamc@91 1479 L'.CError => (eerror, cerror, [])
adamc@328 1480 | L'.TCFun (_, x, k, eb) =>
adamc@91 1481 let
adamc@91 1482 val () = checkKind env c' ck k
adamc@91 1483 val eb' = subConInCon (0, c') eb
adamc@339 1484 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1485 cerror)
adamc@91 1486 in
adamc@328 1487 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1488 ("et", p_con env oldEt),
adamc@328 1489 ("x", PD.string x),
adamc@328 1490 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1491 ("c", p_con env c'),
adamc@328 1492 ("eb'", p_con env eb')];*)
adamc@228 1493 ((L'.ECApp (e', c'), loc), eb', gs1 @ gs2 @ enD gs3 @ enD gs4)
adamc@91 1494 end
adamc@91 1495
adamc@91 1496 | _ =>
adamc@91 1497 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1498 (eerror, cerror, []))
adamc@91 1499 end
adamc@91 1500 | L.ECAbs (expl, x, k, e) =>
adamc@91 1501 let
adamc@91 1502 val expl' = elabExplicitness expl
adamc@91 1503 val k' = elabKind k
adamc@328 1504
adamc@328 1505 val env' = E.pushCRel env x k'
adamc@328 1506 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1507 in
adamc@91 1508 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1509 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1510 gs)
adamc@91 1511 end
adamc@91 1512
adamc@91 1513 | L.EDisjoint (c1, c2, e) =>
adamc@91 1514 let
adamc@91 1515 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1516 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1517
adamc@91 1518 val ku1 = kunif loc
adamc@91 1519 val ku2 = kunif loc
adamc@91 1520
adamc@91 1521 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@91 1522 val (e', t, gs4) = elabExp (env, denv') e
adamc@91 1523 in
adamc@91 1524 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1525 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1526
adamc@334 1527 (e', (L'.TDisjoint (L'.LeaveAlone, c1', c2', t), loc), enD gs1 @ enD gs2 @ enD gs3 @ gs4)
adamc@91 1528 end
adamc@91 1529
adamc@91 1530 | L.ERecord xes =>
adamc@91 1531 let
adamc@91 1532 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1533 let
adamc@91 1534 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1535 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1536 in
adamc@91 1537 checkKind env x' xk kname;
adamc@228 1538 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1539 end)
adamc@91 1540 [] xes
adamc@91 1541
adamc@91 1542 val k = (L'.KType, loc)
adamc@91 1543
adamc@91 1544 fun prove (xets, gs) =
adamc@91 1545 case xets of
adamc@91 1546 [] => gs
adamc@91 1547 | (x, _, t) :: rest =>
adamc@91 1548 let
adamc@91 1549 val xc = (x, t)
adamc@91 1550 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1551 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1552 let
adamc@91 1553 val xc' = (x', t')
adamc@91 1554 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1555 in
adamc@91 1556 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1557 end)
adamc@91 1558 gs rest
adamc@91 1559 in
adamc@91 1560 prove (rest, gs)
adamc@91 1561 end
adamc@228 1562
adamc@228 1563 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1564 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1565 in
adamc@255 1566 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1567 ((L'.ERecord xes', loc),
adamc@91 1568 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1569 enD (prove (xes', gsD)) @ gsO)
adamc@91 1570 end
adamc@91 1571
adamc@91 1572 | L.EField (e, c) =>
adamc@91 1573 let
adamc@91 1574 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1575 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1576
adamc@91 1577 val ft = cunif (loc, ktype)
adamc@91 1578 val rest = cunif (loc, ktype_record)
adamc@91 1579 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@91 1580
adamc@91 1581 val gs3 =
adamc@91 1582 checkCon (env, denv) e' et
adamc@91 1583 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@91 1584 val gs4 = D.prove env denv (first, rest, loc)
adamc@91 1585 in
adamc@228 1586 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@91 1587 end
adamc@91 1588
adamc@339 1589 | L.EWith (e1, c, e2) =>
adamc@339 1590 let
adamc@339 1591 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@339 1592 val (c', ck, gs2) = elabCon (env, denv) c
adamc@339 1593 val (e2', e2t, gs3) = elabExp (env, denv) e2
adamc@339 1594
adamc@339 1595 val rest = cunif (loc, ktype_record)
adamc@339 1596 val first = (L'.CRecord (ktype, [(c', e2t)]), loc)
adamc@339 1597
adamc@339 1598 val gs4 = checkCon (env, denv) e1' e1t (L'.TRecord rest, loc)
adamc@339 1599 val gs5 = D.prove env denv (first, rest, loc)
adamc@339 1600 in
adamc@339 1601 ((L'.EWith (e1', c', e2', {field = e2t, rest = rest}), loc),
adamc@339 1602 (L'.TRecord ((L'.CConcat (first, rest), loc)), loc),
adamc@339 1603 gs1 @ enD gs2 @ gs3 @ enD gs4 @ enD gs5)
adamc@339 1604 end
adamc@149 1605 | L.ECut (e, c) =>
adamc@149 1606 let
adamc@149 1607 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1608 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1609
adamc@149 1610 val ft = cunif (loc, ktype)
adamc@149 1611 val rest = cunif (loc, ktype_record)
adamc@149 1612 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@149 1613
adamc@149 1614 val gs3 =
adamc@149 1615 checkCon (env, denv) e' et
adamc@149 1616 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1617 val gs4 = D.prove env denv (first, rest, loc)
adamc@149 1618 in
adamc@228 1619 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@228 1620 gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@149 1621 end
adamc@149 1622
adamc@91 1623 | L.EFold =>
adamc@91 1624 let
adamc@91 1625 val dom = kunif loc
adamc@91 1626 in
adamc@91 1627 ((L'.EFold dom, loc), foldType (dom, loc), [])
adamc@91 1628 end
adamc@170 1629
adamc@171 1630 | L.ECase (e, pes) =>
adamc@171 1631 let
adamc@171 1632 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1633 val result = cunif (loc, (L'.KType, loc))
adamc@171 1634 val (pes', gs) = ListUtil.foldlMap
adamc@171 1635 (fn ((p, e), gs) =>
adamc@171 1636 let
adamc@174 1637 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
adamc@171 1638
adamc@171 1639 val gs1 = checkPatCon (env, denv) p' pt et
adamc@171 1640 val (e', et, gs2) = elabExp (env, denv) e
adamc@171 1641 val gs3 = checkCon (env, denv) e' et result
adamc@171 1642 in
adamc@228 1643 ((p', e'), enD gs1 @ gs2 @ enD gs3 @ gs)
adamc@171 1644 end)
adamc@171 1645 gs1 pes
adamc@172 1646
adamc@172 1647 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
adamc@171 1648 in
adamc@172 1649 if total then
adamc@172 1650 ()
adamc@172 1651 else
adamc@172 1652 expError env (Inexhaustive loc);
adamc@172 1653
adamc@228 1654 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, enD gs' @ gs)
adamc@171 1655 end
adamc@280 1656
adamc@280 1657 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 r)*)
adamc@280 1658 in
adamc@280 1659 (*prefaces "elabExp" [("e", SourcePrint.p_exp eAll),
adamc@280 1660 ("|tcs|", PD.string (Int.toString (length tcs)))];*)
adamc@280 1661 r
adamc@91 1662 end
adamc@31 1663
adamc@42 1664 val hnormSgn = E.hnormSgn
adamc@31 1665
adamc@210 1666 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 1667 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@205 1668
adamc@88 1669 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1670 case sgi of
adamc@76 1671 L.SgiConAbs (x, k) =>
adamc@76 1672 let
adamc@76 1673 val k' = elabKind k
adamc@31 1674
adamc@76 1675 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1676 in
adamc@88 1677 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1678 end
adamc@31 1679
adamc@76 1680 | L.SgiCon (x, ko, c) =>
adamc@76 1681 let
adamc@76 1682 val k' = case ko of
adamc@76 1683 NONE => kunif loc
adamc@76 1684 | SOME k => elabKind k
adamc@31 1685
adamc@83 1686 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1687 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1688 in
adamc@76 1689 checkKind env c' ck k';
adamc@31 1690
adamc@88 1691 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1692 end
adamc@31 1693
adamc@191 1694 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1695 let
adamc@157 1696 val k = (L'.KType, loc)
adamc@191 1697 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1698 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1699 val t = (L'.CNamed n, loc)
adamc@194 1700 val nxs = length xs - 1
adamc@194 1701 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1702
adamc@284 1703 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@284 1704 (E.pushCRel env' x k,
adamc@284 1705 D.enter denv')) (env, denv) xs
adamc@284 1706
adamc@157 1707 val (xcs, (used, env, gs)) =
adamc@157 1708 ListUtil.foldlMap
adamc@157 1709 (fn ((x, to), (used, env, gs)) =>
adamc@157 1710 let
adamc@157 1711 val (to, t, gs') = case to of
adamc@157 1712 NONE => (NONE, t, gs)
adamc@157 1713 | SOME t' =>
adamc@157 1714 let
adamc@284 1715 val (t', tk, gs') = elabCon (env', denv') t'
adamc@157 1716 in
adamc@284 1717 checkKind env' t' tk k;
adamc@157 1718 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1719 end
adamc@191 1720 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1721
adamc@157 1722 val (env, n') = E.pushENamed env x t
adamc@157 1723 in
adamc@157 1724 if SS.member (used, x) then
adamc@157 1725 strError env (DuplicateConstructor (x, loc))
adamc@157 1726 else
adamc@157 1727 ();
adamc@157 1728 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1729 end)
adamc@157 1730 (SS.empty, env, []) xcs
adamc@191 1731
adamc@191 1732 val env = E.pushDatatype env n xs xcs
adamc@157 1733 in
adamc@191 1734 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1735 end
adamc@156 1736
adamc@158 1737 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1738
adamc@158 1739 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1740 (case E.lookupStr env m1 of
adamc@158 1741 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1742 ([], (env, denv, gs)))
adamc@158 1743 | SOME (n, sgn) =>
adamc@158 1744 let
adamc@158 1745 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1746 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1747 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1748 (strerror, sgnerror))
adamc@158 1749 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1750 ((L'.StrVar n, loc), sgn) ms
adamc@158 1751 in
adamc@161 1752 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@161 1753 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@161 1754 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1755 NONE => (conError env (UnboundDatatype (loc, s));
adamc@161 1756 ([], (env, denv, gs)))
adamc@191 1757 | SOME (xs, xncs) =>
adamc@161 1758 let
adamc@161 1759 val k = (L'.KType, loc)
adamc@191 1760 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1761
adamc@161 1762 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1763 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1764 val env = E.pushDatatype env n' xs xncs
adamc@158 1765
adamc@161 1766 val t = (L'.CNamed n', loc)
adamc@161 1767 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1768 let
adamc@161 1769 val t = case to of
adamc@161 1770 NONE => t
adamc@161 1771 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1772
adamc@191 1773 val t = foldr (fn (x, t) =>
adamc@191 1774 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1775 t xs
adamc@161 1776 in
adamc@161 1777 E.pushENamedAs env x n t
adamc@161 1778 end) env xncs
adamc@161 1779 in
adamc@191 1780 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@161 1781 end)
adamc@161 1782 | _ => (strError env (NotDatatype loc);
adamc@161 1783 ([], (env, denv, [])))
adamc@158 1784 end)
adamc@156 1785
adamc@76 1786 | L.SgiVal (x, c) =>
adamc@76 1787 let
adamc@83 1788 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 1789
adamc@76 1790 val (env', n) = E.pushENamed env x c'
adamc@218 1791 val (c', gs'') = normClassConstraint (env, denv) c'
adamc@76 1792 in
adamc@76 1793 (unifyKinds ck ktype
adamc@76 1794 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 1795
adamc@218 1796 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs'' @ gs))
adamc@76 1797 end
adamc@31 1798
adamc@76 1799 | L.SgiStr (x, sgn) =>
adamc@76 1800 let
adamc@83 1801 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1802 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 1803 in
adamc@88 1804 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1805 end
adamc@31 1806
adamc@76 1807 | L.SgiSgn (x, sgn) =>
adamc@76 1808 let
adamc@83 1809 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1810 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 1811 in
adamc@88 1812 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1813 end
adamc@31 1814
adamc@76 1815 | L.SgiInclude sgn =>
adamc@76 1816 let
adamc@83 1817 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1818 in
adamc@76 1819 case #1 (hnormSgn env sgn') of
adamc@76 1820 L'.SgnConst sgis =>
adamc@88 1821 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 1822 | _ => (sgnError env (NotIncludable sgn');
adamc@88 1823 ([], (env, denv, [])))
adamc@88 1824 end
adamc@88 1825
adamc@88 1826 | L.SgiConstraint (c1, c2) =>
adamc@88 1827 let
adamc@88 1828 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 1829 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 1830
adamc@90 1831 val (denv, gs3) = D.assert env denv (c1', c2')
adamc@88 1832 in
adamc@88 1833 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 1834 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 1835
adamc@90 1836 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
adamc@76 1837 end
adamc@31 1838
adamc@203 1839 | L.SgiTable (x, c) =>
adamc@203 1840 let
adamc@203 1841 val (c', k, gs) = elabCon (env, denv) c
adamc@210 1842 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 1843 in
adamc@203 1844 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 1845 ([(L'.SgiTable (!basis_r, x, n, c'), loc)], (env, denv, gs))
adamc@203 1846 end
adamc@203 1847
adamc@338 1848 | L.SgiSequence x =>
adamc@338 1849 let
adamc@338 1850 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 1851 in
adamc@338 1852 ([(L'.SgiSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 1853 end
adamc@338 1854
adamc@211 1855 | L.SgiClassAbs x =>
adamc@211 1856 let
adamc@211 1857 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1858 val (env, n) = E.pushCNamed env x k NONE
adamc@211 1859 val env = E.pushClass env n
adamc@211 1860 in
adamc@211 1861 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
adamc@211 1862 end
adamc@211 1863
adamc@211 1864 | L.SgiClass (x, c) =>
adamc@211 1865 let
adamc@211 1866 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1867 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 1868 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 1869 val env = E.pushClass env n
adamc@211 1870 in
adamc@211 1871 checkKind env c' ck k;
adamc@211 1872 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
adamc@211 1873 end
adamc@211 1874
adamc@83 1875 and elabSgn (env, denv) (sgn, loc) =
adamc@31 1876 case sgn of
adamc@31 1877 L.SgnConst sgis =>
adamc@31 1878 let
adamc@88 1879 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 1880
adamc@62 1881 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 1882 case sgi of
adamc@62 1883 L'.SgiConAbs (x, _, _) =>
adamc@62 1884 (if SS.member (cons, x) then
adamc@62 1885 sgnError env (DuplicateCon (loc, x))
adamc@62 1886 else
adamc@62 1887 ();
adamc@62 1888 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1889 | L'.SgiCon (x, _, _, _) =>
adamc@62 1890 (if SS.member (cons, x) then
adamc@62 1891 sgnError env (DuplicateCon (loc, x))
adamc@62 1892 else
adamc@62 1893 ();
adamc@62 1894 (SS.add (cons, x), vals, sgns, strs))
adamc@191 1895 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 1896 let
adamc@156 1897 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 1898 (if SS.member (vals, x) then
adamc@156 1899 sgnError env (DuplicateVal (loc, x))
adamc@156 1900 else
adamc@156 1901 ();
adamc@156 1902 SS.add (vals, x)))
adamc@156 1903 vals xncs
adamc@156 1904 in
adamc@156 1905 if SS.member (cons, x) then
adamc@156 1906 sgnError env (DuplicateCon (loc, x))
adamc@156 1907 else
adamc@156 1908 ();
adamc@156 1909 (SS.add (cons, x), vals, sgns, strs)
adamc@156 1910 end
adamc@191 1911 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 1912 (if SS.member (cons, x) then
adamc@156 1913 sgnError env (DuplicateCon (loc, x))
adamc@156 1914 else
adamc@156 1915 ();
adamc@156 1916 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1917 | L'.SgiVal (x, _, _) =>
adamc@62 1918 (if SS.member (vals, x) then
adamc@62 1919 sgnError env (DuplicateVal (loc, x))
adamc@62 1920 else
adamc@62 1921 ();
adamc@62 1922 (cons, SS.add (vals, x), sgns, strs))
adamc@62 1923 | L'.SgiSgn (x, _, _) =>
adamc@62 1924 (if SS.member (sgns, x) then
adamc@62 1925 sgnError env (DuplicateSgn (loc, x))
adamc@62 1926 else
adamc@62 1927 ();
adamc@62 1928 (cons, vals, SS.add (sgns, x), strs))
adamc@62 1929 | L'.SgiStr (x, _, _) =>
adamc@62 1930 (if SS.member (strs, x) then
adamc@62 1931 sgnError env (DuplicateStr (loc, x))
adamc@62 1932 else
adamc@62 1933 ();
adamc@88 1934 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 1935 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@205 1936 | L'.SgiTable (_, x, _, _) =>
adamc@203 1937 (if SS.member (vals, x) then
adamc@203 1938 sgnError env (DuplicateVal (loc, x))
adamc@203 1939 else
adamc@203 1940 ();
adamc@211 1941 (cons, SS.add (vals, x), sgns, strs))
adamc@338 1942 | L'.SgiSequence (_, x, _) =>
adamc@338 1943 (if SS.member (vals, x) then
adamc@338 1944 sgnError env (DuplicateVal (loc, x))
adamc@338 1945 else
adamc@338 1946 ();
adamc@338 1947 (cons, SS.add (vals, x), sgns, strs))
adamc@211 1948 | L'.SgiClassAbs (x, _) =>
adamc@211 1949 (if SS.member (cons, x) then
adamc@211 1950 sgnError env (DuplicateCon (loc, x))
adamc@211 1951 else
adamc@211 1952 ();
adamc@211 1953 (SS.add (cons, x), vals, sgns, strs))
adamc@211 1954 | L'.SgiClass (x, _, _) =>
adamc@211 1955 (if SS.member (cons, x) then
adamc@211 1956 sgnError env (DuplicateCon (loc, x))
adamc@211 1957 else
adamc@211 1958 ();
adamc@211 1959 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 1960 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 1961 in
adamc@83 1962 ((L'.SgnConst sgis', loc), gs)
adamc@31 1963 end
adamc@31 1964 | L.SgnVar x =>
adamc@31 1965 (case E.lookupSgn env x of
adamc@31 1966 NONE =>
adamc@31 1967 (sgnError env (UnboundSgn (loc, x));
adamc@83 1968 ((L'.SgnError, loc), []))
adamc@83 1969 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 1970 | L.SgnFun (m, dom, ran) =>
adamc@41 1971 let
adamc@83 1972 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 1973 val (env', n) = E.pushStrNamed env m dom'
adamc@83 1974 val (ran', gs2) = elabSgn (env', denv) ran
adamc@41 1975 in
adamc@83 1976 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 1977 end
adamc@42 1978 | L.SgnWhere (sgn, x, c) =>
adamc@42 1979 let
adamc@83 1980 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 1981 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 1982 in
adamc@42 1983 case #1 (hnormSgn env sgn') of
adamc@83 1984 L'.SgnError => (sgnerror, [])
adamc@42 1985 | L'.SgnConst sgis =>
adamc@75 1986 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 1987 x' = x andalso
adamc@75 1988 (unifyKinds k ck
adamc@75 1989 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 1990 true)
adamc@42 1991 | _ => false) sgis then
adamc@83 1992 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 1993 else
adamc@42 1994 (sgnError env (UnWhereable (sgn', x));
adamc@83 1995 (sgnerror, []))
adamc@42 1996 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 1997 (sgnerror, []))
adamc@42 1998 end
adamc@59 1999 | L.SgnProj (m, ms, x) =>
adamc@59 2000 (case E.lookupStr env m of
adamc@59 2001 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2002 (sgnerror, []))
adamc@59 2003 | SOME (n, sgn) =>
adamc@59 2004 let
adamc@59 2005 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2006 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2007 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2008 (strerror, sgnerror))
adamc@59 2009 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2010 ((L'.StrVar n, loc), sgn) ms
adamc@59 2011 in
adamc@59 2012 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2013 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2014 (sgnerror, []))
adamc@83 2015 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2016 end)
adamc@59 2017
adamc@31 2018
adamc@66 2019 fun selfify env {str, strs, sgn} =
adamc@66 2020 case #1 (hnormSgn env sgn) of
adamc@66 2021 L'.SgnError => sgn
adamc@66 2022 | L'.SgnVar _ => sgn
adamc@66 2023
adamc@66 2024 | L'.SgnConst sgis =>
adamc@66 2025 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2026 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2027 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2028 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@218 2029 | (L'.SgiClassAbs (x, n), loc) =>
adamc@218 2030 (L'.SgiClass (x, n, (L'.CModProj (str, strs, x), loc)), loc)
adamc@66 2031 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2032 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2033 | x => x) sgis), #2 sgn)
adamc@66 2034 | L'.SgnFun _ => sgn
adamc@66 2035 | L'.SgnWhere _ => sgn
adamc@66 2036 | L'.SgnProj (m, ms, x) =>
adamc@66 2037 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2038 (L'.StrVar m, #2 sgn) ms,
adamc@66 2039 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2040 field = x} of
adamc@66 2041 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2042 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2043
adamc@66 2044 fun selfifyAt env {str, sgn} =
adamc@66 2045 let
adamc@66 2046 fun self (str, _) =
adamc@66 2047 case str of
adamc@66 2048 L'.StrVar x => SOME (x, [])
adamc@66 2049 | L'.StrProj (str, x) =>
adamc@66 2050 (case self str of
adamc@66 2051 NONE => NONE
adamc@66 2052 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2053 | _ => NONE
adamc@66 2054 in
adamc@66 2055 case self str of
adamc@66 2056 NONE => sgn
adamc@66 2057 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2058 end
adamc@66 2059
adamc@88 2060 fun dopen (env, denv) {str, strs, sgn} =
adamc@66 2061 let
adamc@66 2062 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2063 (L'.StrVar str, #2 sgn) strs
adamc@66 2064 in
adamc@66 2065 case #1 (hnormSgn env sgn) of
adamc@66 2066 L'.SgnConst sgis =>
adamc@88 2067 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
adamc@162 2068 let
adamc@162 2069 val d =
adamc@162 2070 case sgi of
adamc@162 2071 L'.SgiConAbs (x, n, k) =>
adamc@162 2072 let
adamc@162 2073 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2074 in
adamc@162 2075 (L'.DCon (x, n, k, c), loc)
adamc@162 2076 end
adamc@162 2077 | L'.SgiCon (x, n, k, c) =>
adamc@162 2078 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2079 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2080 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2081 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2082 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2083 | L'.SgiVal (x, n, t) =>
adamc@162 2084 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2085 | L'.SgiStr (x, n, sgn) =>
adamc@162 2086 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2087 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2088 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2089 | L'.SgiConstraint (c1, c2) =>
adamc@162 2090 (L'.DConstraint (c1, c2), loc)
adamc@205 2091 | L'.SgiTable (_, x, n, c) =>
adamc@210 2092 (L'.DVal (x, n, (L'.CApp (tableOf (), c), loc),
adamc@203 2093 (L'.EModProj (str, strs, x), loc)), loc)
adamc@338 2094 | L'.SgiSequence (_, x, n) =>
adamc@338 2095 (L'.DVal (x, n, sequenceOf (),
adamc@338 2096 (L'.EModProj (str, strs, x), loc)), loc)
adamc@211 2097 | L'.SgiClassAbs (x, n) =>
adamc@211 2098 let
adamc@211 2099 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2100 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2101 in
adamc@211 2102 (L'.DCon (x, n, k, c), loc)
adamc@211 2103 end
adamc@211 2104 | L'.SgiClass (x, n, _) =>
adamc@211 2105 let
adamc@211 2106 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2107 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2108 in
adamc@211 2109 (L'.DCon (x, n, k, c), loc)
adamc@211 2110 end
adamc@162 2111 in
adamc@162 2112 (d, (E.declBinds env' d, denv'))
adamc@162 2113 end)
adamc@88 2114 (env, denv) sgis
adamc@66 2115 | _ => (strError env (UnOpenable sgn);
adamc@88 2116 ([], (env, denv)))
adamc@66 2117 end
adamc@66 2118
adamc@88 2119 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@88 2120 case E.lookupStr env str of
adamc@88 2121 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2122 denv)
adamc@88 2123 | SOME (n, sgn) =>
adamc@88 2124 let
adamc@88 2125 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2126 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2127 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2128 (strerror, sgnerror))
adamc@88 2129 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2130 ((L'.StrVar n, loc), sgn) strs
adamc@88 2131
adamc@88 2132 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@88 2133
adamc@88 2134 val denv = case cso of
adamc@88 2135 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2136 denv)
adamc@90 2137 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@90 2138 let
adamc@90 2139 val (denv, gs) = D.assert env denv (c1, c2)
adamc@90 2140 in
adamc@90 2141 case gs of
adamc@90 2142 [] => ()
adamc@90 2143 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
adamc@90 2144
adamc@90 2145 denv
adamc@90 2146 end) denv cs
adamc@88 2147 in
adamc@88 2148 denv
adamc@88 2149 end
adamc@88 2150
adamc@31 2151 fun sgiOfDecl (d, loc) =
adamc@31 2152 case d of
adamc@123 2153 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2154 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2155 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2156 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2157 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2158 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2159 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2160 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2161 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2162 | L'.DExport _ => []
adamc@205 2163 | L'.DTable (tn, x, n, c) => [(L'.SgiTable (tn, x, n, c), loc)]
adamc@338 2164 | L'.DSequence (tn, x, n) => [(L'.SgiSequence (tn, x, n), loc)]
adamc@213 2165 | L'.DClass (x, n, c) => [(L'.SgiClass (x, n, c), loc)]
adamc@271 2166 | L'.DDatabase _ => []
adamc@88 2167
adamc@88 2168 fun sgiBindsD (env, denv) (sgi, _) =
adamc@88 2169 case sgi of
adamc@90 2170 L'.SgiConstraint (c1, c2) =>
adamc@90 2171 (case D.assert env denv (c1, c2) of
adamc@90 2172 (denv, []) => denv
adamc@90 2173 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
adamc@88 2174 | _ => denv
adamc@31 2175
adamc@86 2176 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
adamc@35 2177 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2178 (L'.SgnError, _) => ()
adamc@31 2179 | (_, L'.SgnError) => ()
adamc@31 2180
adamc@31 2181 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2182 let
adamc@156 2183 fun folder (sgi2All as (sgi, loc), (env, denv)) =
adamc@31 2184 let
adamc@31 2185 fun seek p =
adamc@31 2186 let
adamc@88 2187 fun seek (env, denv) ls =
adamc@31 2188 case ls of
adamc@31 2189 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@88 2190 (env, denv))
adamc@31 2191 | h :: t =>
adamc@31 2192 case p h of
adamc@88 2193 NONE => seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
adamc@88 2194 | SOME envs => envs
adamc@31 2195 in
adamc@88 2196 seek (env, denv) sgis1
adamc@31 2197 end
adamc@31 2198 in
adamc@31 2199 case sgi of
adamc@31 2200 L'.SgiConAbs (x, n2, k2) =>
adamc@31 2201 seek (fn sgi1All as (sgi1, _) =>
adamc@31 2202 let
adamc@41 2203 fun found (x', n1, k1, co1) =
adamc@41 2204 if x = x' then
adamc@41 2205 let
adamc@41 2206 val () = unifyKinds k1 k2
adamc@41 2207 handle KUnify (k1, k2, err) =>
adamc@41 2208 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2209 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2210 in
adamc@41 2211 SOME (if n1 = n2 then
adamc@41 2212 env
adamc@41 2213 else
adamc@88 2214 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
adamc@88 2215 denv)
adamc@41 2216 end
adamc@41 2217 else
adamc@41 2218 NONE
adamc@31 2219 in
adamc@31 2220 case sgi1 of
adamc@41 2221 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2222 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2223 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2224 let
adamc@191 2225 val k = (L'.KType, loc)
adamc@191 2226 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2227 in
adamc@191 2228 found (x', n1, k', NONE)
adamc@191 2229 end
adamc@191 2230 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2231 let
adamc@191 2232 val k = (L'.KType, loc)
adamc@191 2233 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2234 in
adamc@191 2235 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2236 end
adamc@211 2237 | L'.SgiClassAbs (x', n1) => found (x', n1,
adamc@218 2238 (L'.KArrow ((L'.KType, loc),
adamc@218 2239 (L'.KType, loc)), loc),
adamc@218 2240 NONE)
adamc@211 2241 | L'.SgiClass (x', n1, c) => found (x', n1,
adamc@211 2242 (L'.KArrow ((L'.KType, loc),
adamc@211 2243 (L'.KType, loc)), loc),
adamc@211 2244 SOME c)
adamc@31 2245 | _ => NONE
adamc@31 2246 end)
adamc@31 2247
adamc@31 2248 | L'.SgiCon (x, n2, k2, c2) =>
adamc@31 2249 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2250 let
adamc@211 2251 fun found (x', n1, k1, c1) =
adamc@211 2252 if x = x' then
adamc@211 2253 let
adamc@327 2254 fun good () =
adamc@327 2255 let
adamc@327 2256 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2257 val env = if n1 = n2 then
adamc@327 2258 env
adamc@327 2259 else
adamc@327 2260 E.pushCNamedAs env x n1 k1 (SOME c1)
adamc@327 2261 in
adamc@327 2262 SOME (env, denv)
adamc@327 2263 end
adamc@211 2264 in
adamc@211 2265 (case unifyCons (env, denv) c1 c2 of
adamc@211 2266 [] => good ()
adamc@211 2267 | _ => NONE)
adamc@211 2268 handle CUnify (c1, c2, err) =>
adamc@211 2269 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2270 good ())
adamc@211 2271 end
adamc@211 2272 else
adamc@211 2273 NONE
adamc@211 2274 in
adamc@211 2275 case sgi1 of
adamc@211 2276 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2277 | L'.SgiClass (x', n1, c1) =>
adamc@211 2278 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
adamc@211 2279 | _ => NONE
adamc@211 2280 end)
adamc@31 2281
adamc@191 2282 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@156 2283 seek (fn sgi1All as (sgi1, _) =>
adamc@160 2284 let
adamc@191 2285 fun found (n1, xs1, xncs1) =
adamc@160 2286 let
adamc@160 2287 fun mismatched ue =
adamc@160 2288 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@160 2289 SOME (env, denv))
adamc@156 2290
adamc@191 2291 val k = (L'.KType, loc)
adamc@191 2292 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2293
adamc@160 2294 fun good () =
adamc@160 2295 let
adamc@160 2296 val env = E.sgiBinds env sgi2All
adamc@160 2297 val env = if n1 = n2 then
adamc@160 2298 env
adamc@160 2299 else
adamc@160 2300 E.pushCNamedAs env x n1 (L'.KType, loc)
adamc@160 2301 (SOME (L'.CNamed n1, loc))
adamc@160 2302 in
adamc@160 2303 SOME (env, denv)
adamc@160 2304 end
adamc@156 2305
adamc@191 2306 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2307 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2308 String.compare (x1, x2) <> EQUAL
adamc@160 2309 orelse case (t1, t2) of
adamc@160 2310 (NONE, NONE) => false
adamc@160 2311 | (SOME t1, SOME t2) =>
adamc@160 2312 not (List.null (unifyCons (env, denv) t1 t2))
adamc@160 2313 | _ => true
adamc@160 2314 in
adamc@191 2315 (if xs1 <> xs2
adamc@191 2316 orelse length xncs1 <> length xncs2
adamc@160 2317 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2318 mismatched NONE
adamc@160 2319 else
adamc@160 2320 good ())
adamc@160 2321 handle CUnify ue => mismatched (SOME ue)
adamc@160 2322 end
adamc@160 2323 in
adamc@160 2324 case sgi1 of
adamc@191 2325 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2326 if x' = x then
adamc@191 2327 found (n1, xs, xncs1)
adamc@160 2328 else
adamc@160 2329 NONE
adamc@191 2330 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2331 if x' = x then
adamc@191 2332 found (n1, xs, xncs1)
adamc@162 2333 else
adamc@162 2334 NONE
adamc@160 2335 | _ => NONE
adamc@160 2336 end)
adamc@156 2337
adamc@191 2338 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@158 2339 seek (fn sgi1All as (sgi1, _) =>
adamc@158 2340 case sgi1 of
adamc@191 2341 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2342 if x = x' then
adamc@158 2343 let
adamc@158 2344 val k = (L'.KType, loc)
adamc@191 2345 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2346 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2347 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2348
adamc@158 2349 fun good () =
adamc@158 2350 let
adamc@191 2351 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2352 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2353 in
adamc@158 2354 SOME (env, denv)
adamc@158 2355 end
adamc@158 2356 in
adamc@158 2357 (case unifyCons (env, denv) t1 t2 of
adamc@158 2358 [] => good ()
adamc@158 2359 | _ => NONE)
adamc@158 2360 handle CUnify (c1, c2, err) =>
adamc@158 2361 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2362 good ())
adamc@158 2363 end
adamc@158 2364 else
adamc@158 2365 NONE
adamc@158 2366
adamc@158 2367 | _ => NONE)
adamc@156 2368
adamc@32 2369 | L'.SgiVal (x, n2, c2) =>
adamc@32 2370 seek (fn sgi1All as (sgi1, _) =>
adamc@32 2371 case sgi1 of
adamc@41 2372 L'.SgiVal (x', n1, c1) =>
adamc@41 2373 if x = x' then
adamc@86 2374 (case unifyCons (env, denv) c1 c2 of
adamc@88 2375 [] => SOME (env, denv)
adamc@86 2376 | _ => NONE)
adamc@86 2377 handle CUnify (c1, c2, err) =>
adamc@86 2378 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@88 2379 SOME (env, denv))
adamc@41 2380 else
adamc@41 2381 NONE
adamc@205 2382 | L'.SgiTable (_, x', n1, c1) =>
adamc@203 2383 if x = x' then
adamc@210 2384 (case unifyCons (env, denv) (L'.CApp (tableOf (), c1), loc) c2 of
adamc@203 2385 [] => SOME (env, denv)
adamc@203 2386 | _ => NONE)
adamc@203 2387 handle CUnify (c1, c2, err) =>
adamc@203 2388 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2389 SOME (env, denv))
adamc@203 2390 else
adamc@203 2391 NONE
adamc@338 2392 | L'.SgiSequence (_, x', n1) =>
adamc@338 2393 if x = x' then
adamc@338 2394 (case unifyCons (env, denv) (sequenceOf ()) c2 of
adamc@338 2395 [] => SOME (env, denv)
adamc@338 2396 | _ => NONE)
adamc@338 2397 handle CUnify (c1, c2, err) =>
adamc@338 2398 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@338 2399 SOME (env, denv))
adamc@338 2400 else
adamc@338 2401 NONE
adamc@32 2402 | _ => NONE)
adamc@32 2403
adamc@33 2404 | L'.SgiStr (x, n2, sgn2) =>
adamc@33 2405 seek (fn sgi1All as (sgi1, _) =>
adamc@33 2406 case sgi1 of
adamc@41 2407 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2408 if x = x' then
adamc@66 2409 let
adamc@86 2410 val () = subSgn (env, denv) sgn1 sgn2
adamc@66 2411 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2412 val env = if n1 = n2 then
adamc@66 2413 env
adamc@66 2414 else
adamc@66 2415 E.pushStrNamedAs env x n2
adamc@66 2416 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2417 sgn = sgn2})
adamc@66 2418 in
adamc@88 2419 SOME (env, denv)
adamc@66 2420 end
adamc@41 2421 else
adamc@41 2422 NONE
adamc@33 2423 | _ => NONE)
adamc@59 2424
adamc@59 2425 | L'.SgiSgn (x, n2, sgn2) =>
adamc@59 2426 seek (fn sgi1All as (sgi1, _) =>
adamc@59 2427 case sgi1 of
adamc@59 2428 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2429 if x = x' then
adamc@65 2430 let
adamc@86 2431 val () = subSgn (env, denv) sgn1 sgn2
adamc@86 2432 val () = subSgn (env, denv) sgn2 sgn1
adamc@65 2433
adamc@65 2434 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2435 val env = if n1 = n2 then
adamc@65 2436 env
adamc@65 2437 else
adamc@65 2438 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2439 in
adamc@88 2440 SOME (env, denv)
adamc@65 2441 end
adamc@59 2442 else
adamc@59 2443 NONE
adamc@59 2444 | _ => NONE)
adamc@88 2445
adamc@88 2446 | L'.SgiConstraint (c2, d2) =>
adamc@88 2447 seek (fn sgi1All as (sgi1, _) =>
adamc@88 2448 case sgi1 of
adamc@88 2449 L'.SgiConstraint (c1, d1) =>
adamc@88 2450 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
adamc@90 2451 let
adamc@90 2452 val (denv, gs) = D.assert env denv (c2, d2)
adamc@90 2453 in
adamc@90 2454 case gs of
adamc@90 2455 [] => ()
adamc@90 2456 | _ => raise Fail "subSgn: Sub-constraints remain";
adamc@90 2457
adamc@90 2458 SOME (env, denv)
adamc@90 2459 end
adamc@88 2460 else
adamc@88 2461 NONE
adamc@88 2462 | _ => NONE)
adamc@203 2463
adamc@205 2464 | L'.SgiTable (_, x, n2, c2) =>
adamc@203 2465 seek (fn sgi1All as (sgi1, _) =>
adamc@203 2466 case sgi1 of
adamc@205 2467 L'.SgiTable (_, x', n1, c1) =>
adamc@203 2468 if x = x' then
adamc@203 2469 (case unifyCons (env, denv) c1 c2 of
adamc@203 2470 [] => SOME (env, denv)
adamc@203 2471 | _ => NONE)
adamc@203 2472 handle CUnify (c1, c2, err) =>
adamc@203 2473 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2474 SOME (env, denv))
adamc@203 2475 else
adamc@203 2476 NONE
adamc@203 2477 | _ => NONE)
adamc@211 2478
adamc@338 2479 | L'.SgiSequence (_, x, n2) =>
adamc@338 2480 seek (fn sgi1All as (sgi1, _) =>
adamc@338 2481 case sgi1 of
adamc@338 2482 L'.SgiSequence (_, x', n1) =>
adamc@338 2483 if x = x' then
adamc@338 2484 SOME (env, denv)
adamc@338 2485 else
adamc@338 2486 NONE
adamc@338 2487 | _ => NONE)
adamc@338 2488
adamc@211 2489 | L'.SgiClassAbs (x, n2) =>
adamc@211 2490 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2491 let
adamc@211 2492 fun found (x', n1, co) =
adamc@211 2493 if x = x' then
adamc@211 2494 let
adamc@211 2495 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2496 val env = E.pushCNamedAs env x n1 k co
adamc@211 2497 in
adamc@211 2498 SOME (if n1 = n2 then
adamc@211 2499 env
adamc@211 2500 else
adamc@211 2501 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
adamc@211 2502 denv)
adamc@211 2503 end
adamc@211 2504 else
adamc@211 2505 NONE
adamc@211 2506 in
adamc@211 2507 case sgi1 of
adamc@211 2508 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
adamc@211 2509 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
adamc@211 2510 | _ => NONE
adamc@211 2511 end)
adamc@211 2512 | L'.SgiClass (x, n2, c2) =>
adamc@211 2513 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2514 let
adamc@211 2515 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2516
adamc@211 2517 fun found (x', n1, c1) =
adamc@211 2518 if x = x' then
adamc@211 2519 let
adamc@218 2520 fun good () =
adamc@218 2521 let
adamc@218 2522 val env = E.pushCNamedAs env x n2 k (SOME c2)
adamc@218 2523 val env = if n1 = n2 then
adamc@218 2524 env
adamc@218 2525 else
adamc@218 2526 E.pushCNamedAs env x n1 k (SOME c1)
adamc@218 2527 in
adamc@218 2528 SOME (env, denv)
adamc@218 2529 end
adamc@211 2530 in
adamc@211 2531 (case unifyCons (env, denv) c1 c2 of
adamc@211 2532 [] => good ()
adamc@211 2533 | _ => NONE)
adamc@211 2534 handle CUnify (c1, c2, err) =>
adamc@211 2535 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2536 good ())
adamc@211 2537 end
adamc@211 2538 else
adamc@211 2539 NONE
adamc@211 2540 in
adamc@211 2541 case sgi1 of
adamc@211 2542 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
adamc@211 2543 | _ => NONE
adamc@211 2544 end)
adamc@31 2545 end
adamc@31 2546 in
adamc@88 2547 ignore (foldl folder (env, denv) sgis2)
adamc@31 2548 end
adamc@31 2549
adamc@41 2550 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2551 let
adamc@43 2552 val ran1 =
adamc@43 2553 if n1 = n2 then
adamc@43 2554 ran1
adamc@43 2555 else
adamc@43 2556 subStrInSgn (n1, n2) ran1
adamc@43 2557 in
adamc@86 2558 subSgn (env, denv) dom2 dom1;
adamc@86 2559 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
adamc@43 2560 end
adamc@41 2561
adamc@41 2562 | _ => sgnError env (SgnWrongForm (sgn1, sgn2))
adamc@41 2563
adamc@61 2564
adamc@312 2565 fun positive self =
adamc@312 2566 let
adamc@312 2567 open L
adamc@312 2568
adamc@312 2569 fun none (c, _) =
adamc@312 2570 case c of
adamc@312 2571 CAnnot (c, _) => none c
adamc@312 2572
adamc@312 2573 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 2574 | TCFun (_, _, _, c) => none c
adamc@312 2575 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2576 | TRecord c => none c
adamc@312 2577
adamc@312 2578 | CVar ([], x) => x <> self
adamc@312 2579 | CVar _ => true
adamc@312 2580 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 2581 | CAbs _ => false
adamc@312 2582 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2583
adamc@312 2584 | CName _ => true
adamc@312 2585
adamc@312 2586 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 2587 | CConcat (c1, c2) => none c1 andalso none c2
adamc@312 2588 | CFold => true
adamc@312 2589
adamc@312 2590 | CUnit => true
adamc@312 2591
adamc@312 2592 | CTuple cs => List.all none cs
adamc@312 2593 | CProj (c, _) => none c
adamc@312 2594
adamc@312 2595 | CWild _ => false
adamc@312 2596
adamc@312 2597 fun pos (c, _) =
adamc@312 2598 case c of
adamc@312 2599 CAnnot (c, _) => pos c
adamc@312 2600
adamc@312 2601 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 2602 | TCFun (_, _, _, c) => pos c
adamc@312 2603 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2604 | TRecord c => pos c
adamc@312 2605
adamc@312 2606 | CVar _ => true
adamc@312 2607 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 2608 | CAbs _ => false
adamc@312 2609 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2610
adamc@312 2611 | CName _ => true
adamc@312 2612
adamc@312 2613 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 2614 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@312 2615 | CFold => true
adamc@312 2616
adamc@312 2617 | CUnit => true
adamc@312 2618
adamc@312 2619 | CTuple cs => List.all pos cs
adamc@312 2620 | CProj (c, _) => pos c
adamc@312 2621
adamc@312 2622 | CWild _ => false
adamc@312 2623 in
adamc@312 2624 pos
adamc@312 2625 end
adamc@312 2626
adamc@325 2627 fun wildifyStr env (str, sgn) =
adamc@325 2628 case #1 (hnormSgn env sgn) of
adamc@325 2629 L'.SgnConst sgis =>
adamc@325 2630 (case #1 str of
adamc@325 2631 L.StrConst ds =>
adamc@325 2632 let
adamc@325 2633 fun decompileCon env (c, loc) =
adamc@325 2634 case c of
adamc@325 2635 L'.CRel i =>
adamc@325 2636 let
adamc@325 2637 val (s, _) = E.lookupCRel env i
adamc@325 2638 in
adamc@325 2639 SOME (L.CVar ([], s), loc)
adamc@325 2640 end
adamc@325 2641 | L'.CNamed i =>
adamc@325 2642 let
adamc@325 2643 val (s, _, _) = E.lookupCNamed env i
adamc@325 2644 in
adamc@325 2645 SOME (L.CVar ([], s), loc)
adamc@325 2646 end
adamc@325 2647 | L'.CModProj (m1, ms, x) =>
adamc@325 2648 let
adamc@325 2649 val (s, _) = E.lookupStrNamed env m1
adamc@325 2650 in
adamc@325 2651 SOME (L.CVar (s :: ms, x), loc)
adamc@325 2652 end
adamc@325 2653 | L'.CName s => SOME (L.CName s, loc)
adamc@325 2654 | L'.CRecord (_, xcs) =>
adamc@325 2655 let
adamc@325 2656 fun fields xcs =
adamc@325 2657 case xcs of
adamc@325 2658 [] => SOME []
adamc@325 2659 | (x, t) :: xcs =>
adamc@325 2660 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 2661 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 2662 | _ => NONE
adamc@325 2663 in
adamc@325 2664 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 2665 (fields xcs)
adamc@325 2666 end
adamc@325 2667 | L'.CConcat (c1, c2) =>
adamc@325 2668 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 2669 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 2670 | _ => NONE)
adamc@325 2671 | L'.CUnit => SOME (L.CUnit, loc)
adamc@325 2672
adamc@325 2673 | _ => NONE
adamc@325 2674
adamc@325 2675 val (needed, constraints, _) =
adamc@325 2676 foldl (fn ((sgi, loc), (needed, constraints, env')) =>
adamc@325 2677 let
adamc@325 2678 val (needed, constraints) =
adamc@325 2679 case sgi of
adamc@325 2680 L'.SgiConAbs (x, _, _) => (SS.add (needed, x), constraints)
adamc@325 2681 | L'.SgiConstraint cs => (needed, (env', cs, loc) :: constraints)
adamc@325 2682 | _ => (needed, constraints)
adamc@325 2683 in
adamc@325 2684 (needed, constraints, E.sgiBinds env' (sgi, loc))
adamc@325 2685 end)
adamc@325 2686 (SS.empty, [], env) sgis
adamc@325 2687
adamc@325 2688 val needed = foldl (fn ((d, _), needed) =>
adamc@325 2689 case d of
adamc@325 2690 L.DCon (x, _, _) => (SS.delete (needed, x)
adamc@325 2691 handle NotFound =>
adamc@325 2692 needed)
adamc@325 2693 | L.DClass (x, _) => (SS.delete (needed, x)
adamc@325 2694 handle NotFound => needed)
adamc@325 2695 | L.DOpen _ => SS.empty
adamc@325 2696 | _ => needed)
adamc@325 2697 needed ds
adamc@325 2698
adamc@325 2699 val cds = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 2700 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 2701 (SOME c1, SOME c2) =>
adamc@325 2702 SOME (L.DConstraint (c1, c2), loc)
adamc@325 2703 | _ => NONE) constraints
adamc@325 2704 in
adamc@325 2705 case SS.listItems needed of
adamc@325 2706 [] => (L.StrConst (ds @ cds), #2 str)
adamc@325 2707 | xs =>
adamc@325 2708 let
adamc@325 2709 val kwild = (L.KWild, #2 str)
adamc@325 2710 val cwild = (L.CWild kwild, #2 str)
adamc@325 2711 val ds' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
adamc@325 2712 in
adamc@325 2713 (L.StrConst (ds @ ds' @ cds), #2 str)
adamc@325 2714 end
adamc@325 2715 end
adamc@325 2716 | _ => str)
adamc@325 2717 | _ => str
adamc@325 2718
adamc@334 2719 val makeInstantiable =
adamc@334 2720 let
adamc@334 2721 fun kind k = k
adamc@334 2722 fun con c =
adamc@334 2723 case c of
adamc@334 2724 L'.TDisjoint (L'.LeaveAlone, c1, c2, c) => L'.TDisjoint (L'.Instantiate, c1, c2, c)
adamc@334 2725 | _ => c
adamc@334 2726 in
adamc@334 2727 U.Con.map {kind = kind, con = con}
adamc@334 2728 end
adamc@334 2729
adamc@280 2730 fun elabDecl (dAll as (d, loc), (env, denv, gs : constraint list)) =
adamc@255 2731 let
adamc@255 2732 (*val () = preface ("elabDecl", SourcePrint.p_decl (d, loc))*)
adamc@255 2733
adamc@255 2734 val r =
adamc@255 2735 case d of
adamc@255 2736 L.DCon (x, ko, c) =>
adamc@255 2737 let
adamc@255 2738 val k' = case ko of
adamc@255 2739 NONE => kunif loc
adamc@255 2740 | SOME k => elabKind k
adamc@255 2741
adamc@255 2742 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 2743 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 2744 in
adamc@255 2745 checkKind env c' ck k';
adamc@255 2746
adamc@255 2747 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2748 end
adamc@255 2749 | L.DDatatype (x, xs, xcs) =>
adamc@255 2750 let
adamc@312 2751 val positive = List.all (fn (_, to) =>
adamc@312 2752 case to of
adamc@312 2753 NONE => true
adamc@312 2754 | SOME t => positive x t) xcs
adamc@312 2755
adamc@255 2756 val k = (L'.KType, loc)
adamc@255 2757 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2758 val (env, n) = E.pushCNamed env x k' NONE
adamc@255 2759 val t = (L'.CNamed n, loc)
adamc@255 2760 val nxs = length xs - 1
adamc@255 2761 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@255 2762
adamc@255 2763 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@255 2764 (E.pushCRel env' x k,
adamc@255 2765 D.enter denv')) (env, denv) xs
adamc@255 2766
adamc@255 2767 val (xcs, (used, env, gs')) =
adamc@255 2768 ListUtil.foldlMap
adamc@255 2769 (fn ((x, to), (used, env, gs)) =>
adamc@255 2770 let
adamc@255 2771 val (to, t, gs') = case to of
adamc@255 2772 NONE => (NONE, t, gs)
adamc@255 2773 | SOME t' =>
adamc@255 2774 let
adamc@255 2775 val (t', tk, gs') = elabCon (env', denv') t'
adamc@255 2776 in
adamc@255 2777 checkKind env' t' tk k;
adamc@255 2778 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@255 2779 end
adamc@255 2780 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@255 2781
adamc@255 2782 val (env, n') = E.pushENamed env x t
adamc@255 2783 in
adamc@255 2784 if SS.member (used, x) then
adamc@255 2785 strError env (DuplicateConstructor (x, loc))
adamc@255 2786 else
adamc@255 2787 ();
adamc@255 2788 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@255 2789 end)
adamc@255 2790 (SS.empty, env, []) xcs
adamc@255 2791
adamc@255 2792 val env = E.pushDatatype env n xs xcs
adamc@312 2793 val d' = (L'.DDatatype (x, n, xs, xcs), loc)
adamc@255 2794 in
adamc@312 2795 if positive then
adamc@312 2796 ()
adamc@312 2797 else
adamc@312 2798 declError env (Nonpositive d');
adamc@312 2799
adamc@312 2800 ([d'], (env, denv, gs' @ gs))
adamc@255 2801 end
adamc@255 2802
adamc@255 2803 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 2804
adamc@255 2805 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 2806 (case E.lookupStr env m1 of
adamc@255 2807 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 2808 ([], (env, denv, gs)))
adamc@255 2809 | SOME (n, sgn) =>
adamc@255 2810 let
adamc@255 2811 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 2812 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 2813 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 2814 (strerror, sgnerror))
adamc@255 2815 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 2816 ((L'.StrVar n, loc), sgn) ms
adamc@255 2817 in
adamc@255 2818 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@255 2819 ((L'.CModProj (n, ms, s), _), gs') =>
adamc@255 2820 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 2821 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 2822 ([], (env, denv, gs)))
adamc@255 2823 | SOME (xs, xncs) =>
adamc@255 2824 let
adamc@255 2825 val k = (L'.KType, loc)
adamc@255 2826 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2827 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 2828 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 2829 val env = E.pushDatatype env n' xs xncs
adamc@255 2830
adamc@255 2831 val t = (L'.CNamed n', loc)
adamc@255 2832 val env = foldl (fn ((x, n, to), env) =>
adamc@255 2833 let
adamc@255 2834 val t = case to of
adamc@255 2835 NONE => t
adamc@255 2836 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 2837
adamc@255 2838 val t = foldr (fn (x, t) =>
adamc@255 2839 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 2840 t xs
adamc@255 2841 in
adamc@255 2842 E.pushENamedAs env x n t
adamc@255 2843 end) env xncs
adamc@255 2844 in
adamc@255 2845 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, enD gs' @ gs))
adamc@255 2846 end)
adamc@255 2847 | _ => (strError env (NotDatatype loc);
adamc@255 2848 ([], (env, denv, [])))
adamc@255 2849 end)
adamc@255 2850
adamc@255 2851 | L.DVal (x, co, e) =>
adamc@255 2852 let
adamc@255 2853 val (c', _, gs1) = case co of
adamc@255 2854 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2855 | SOME c => elabCon (env, denv) c
adamc@255 2856
adamc@255 2857 val (e', et, gs2) = elabExp (env, denv) e
adamc@255 2858 val gs3 = checkCon (env, denv) e' et c'
adamc@255 2859 val (c', gs4) = normClassConstraint (env, denv) c'
adamc@255 2860 val (env', n) = E.pushENamed env x c'
adamc@334 2861 val c' = makeInstantiable c'
adamc@255 2862 in
adamc@255 2863 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@255 2864 ("c'", p_con env c')];*)
adamc@255 2865 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ enD gs3 @ enD gs4 @ gs))
adamc@255 2866 end
adamc@255 2867 | L.DValRec vis =>
adamc@255 2868 let
adamc@255 2869 fun allowable (e, _) =
adamc@255 2870 case e of
adamc@255 2871 L.EAbs _ => true
adamc@255 2872 | L.ECAbs (_, _, _, e) => allowable e
adamc@255 2873 | L.EDisjoint (_, _, e) => allowable e
adamc@255 2874 | _ => false
adamc@255 2875
adamc@255 2876 val (vis, gs) = ListUtil.foldlMap
adamc@255 2877 (fn ((x, co, e), gs) =>
adamc@255 2878 let
adamc@255 2879 val (c', _, gs1) = case co of
adamc@255 2880 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2881 | SOME c => elabCon (env, denv) c
adamc@255 2882 in
adamc@255 2883 ((x, c', e), enD gs1 @ gs)
adamc@280 2884 end) gs vis
adamc@255 2885
adamc@255 2886 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 2887 let
adamc@255 2888 val (env, n) = E.pushENamed env x c'
adamc@255 2889 in
adamc@255 2890 ((x, n, c', e), env)
adamc@255 2891 end) env vis
adamc@255 2892
adamc@255 2893 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 2894 let
adamc@255 2895 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 2896
adamc@255 2897 val gs2 = checkCon (env, denv) e' et c'
adamc@334 2898
adamc@334 2899 val c' = makeInstantiable c'
adamc@255 2900 in
adamc@255 2901 if allowable e then
adamc@255 2902 ()
adamc@255 2903 else
adamc@255 2904 expError env (IllegalRec (x, e'));
adamc@255 2905 ((x, n, c', e'), gs1 @ enD gs2 @ gs)
adamc@255 2906 end) gs vis
adamc@255 2907 in
adamc@255 2908 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 2909 end
adamc@255 2910
adamc@255 2911 | L.DSgn (x, sgn) =>
adamc@255 2912 let
adamc@255 2913 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 2914 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 2915 in
adamc@255 2916 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2917 end
adamc@255 2918
adamc@255 2919 | L.DStr (x, sgno, str) =>
adamc@255 2920 let
adamc@255 2921 val () = if x = "Basis" then
adamc@255 2922 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 2923 else
adamc@255 2924 ()
adamc@255 2925
adamc@255 2926 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 2927
adamc@255 2928 val (str', sgn', gs') =
adamc@255 2929 case formal of
adamc@255 2930 NONE =>
adamc@255 2931 let
adamc@255 2932 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 2933 in
adamc@255 2934 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 2935 end
adamc@255 2936 | SOME (formal, gs1) =>
adamc@255 2937 let
adamc@325 2938 val str = wildifyStr env (str, formal)
adamc@255 2939 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 2940 in
adamc@255 2941 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 2942 (str', formal, enD gs1 @ gs2)
adamc@255 2943 end
adamc@255 2944
adamc@255 2945 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 2946 in
adamc@255 2947 case #1 (hnormSgn env sgn') of
adamc@255 2948 L'.SgnFun _ =>
adamc@255 2949 (case #1 str' of
adamc@255 2950 L'.StrFun _ => ()
adamc@255 2951 | _ => strError env (FunctorRebind loc))
adamc@255 2952 | _ => ();
adamc@255 2953
adamc@255 2954 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@255 2955 end
adamc@255 2956
adamc@255 2957 | L.DFfiStr (x, sgn) =>
adamc@255 2958 let
adamc@255 2959 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 2960
adamc@255 2961 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 2962 in
adamc@255 2963 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2964 end
adamc@255 2965
adamc@255 2966 | L.DOpen (m, ms) =>
adamc@255 2967 (case E.lookupStr env m of
adamc@255 2968 NONE => (strError env (UnboundStr (loc, m));
adamc@255 2969 ([], (env, denv, gs)))
adamc@255 2970 | SOME (n, sgn) =>
adamc@255 2971 let
adamc@255 2972 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 2973 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@255 2974 NONE => (strError env (UnboundStr (loc, m));
adamc@255 2975 (strerror, sgnerror))
adamc@255 2976 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 2977 ((L'.StrVar n, loc), sgn) ms
adamc@255 2978
adamc@255 2979 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
adamc@255 2980 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
adamc@255 2981 in
adamc@255 2982 (ds, (env', denv', gs))
adamc@255 2983 end)
adamc@255 2984
adamc@255 2985 | L.DConstraint (c1, c2) =>
adamc@255 2986 let
adamc@255 2987 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 2988 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 2989 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 2990
adamc@255 2991 val (denv', gs4) = D.assert env denv (c1', c2')
adamc@255 2992 in
adamc@255 2993 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 2994 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 2995
adamc@255 2996 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ enD gs4 @ gs))
adamc@255 2997 end
adamc@255 2998
adamc@255 2999 | L.DOpenConstraints (m, ms) =>
adamc@255 3000 let
adamc@255 3001 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3002 in
adamc@255 3003 ([], (env, denv, gs))
adamc@255 3004 end
adamc@255 3005
adamc@255 3006 | L.DExport str =>
adamc@255 3007 let
adamc@255 3008 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3009
adamc@255 3010 val sgn =
adamc@255 3011 case #1 (hnormSgn env sgn) of
adamc@255 3012 L'.SgnConst sgis =>
adamc@255 3013 let
adamc@255 3014 fun doOne (all as (sgi, _), env) =
adamc@255 3015 (case sgi of
adamc@255 3016 L'.SgiVal (x, n, t) =>
adamc@325 3017 let
adamc@325 3018 fun doPage (makeRes, ran) =
adamc@325 3019 case hnormCon (env, denv) ran of
adamc@325 3020 ((L'.CApp (tf, arg), _), []) =>
adamc@325 3021 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg) of
adamc@325 3022 (((L'.CModProj (basis, [], "transaction"), _), []),
adamc@325 3023 ((L'.CApp (tf, arg3), _), [])) =>
adamc@325 3024 (case (basis = !basis_r,
adamc@325 3025 hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
adamc@325 3026 (true,
adamc@325 3027 ((L'.CApp (tf, arg2), _), []),
adamc@325 3028 (((L'.CRecord (_, []), _), []))) =>
adamc@325 3029 (case (hnormCon (env, denv) tf) of
adamc@325 3030 ((L'.CApp (tf, arg1), _), []) =>
adamc@325 3031 (case (hnormCon (env, denv) tf,
adamc@325 3032 hnormCon (env, denv) arg1,
adamc@325 3033 hnormCon (env, denv) arg2) of
adamc@325 3034 ((tf, []), (arg1, []),
adamc@325 3035 ((L'.CRecord (_, []), _), [])) =>
adamc@325 3036 let
adamc@325 3037 val t = (L'.CApp (tf, arg1), loc)
adamc@325 3038 val t = (L'.CApp (t, arg2), loc)
adamc@325 3039 val t = (L'.CApp (t, arg3), loc)
adamc@325 3040 val t = (L'.CApp (
adamc@325 3041 (L'.CModProj
adamc@325 3042 (basis, [], "transaction"), loc),
adamc@325 3043 t), loc)
adamc@325 3044 in
adamc@325 3045 (L'.SgiVal (x, n, makeRes t), loc)
adamc@325 3046 end
adamc@325 3047 | _ => all)
adamc@325 3048 | _ => all)
adamc@325 3049 | _ => all)
adamc@325 3050 | _ => all)
adamc@325 3051 | _ => all
adamc@325 3052 in
adamc@325 3053 case hnormCon (env, denv) t of
adamc@325 3054 ((L'.TFun (dom, ran), _), []) =>
adamc@325 3055 (case hnormCon (env, denv) dom of
adamc@325 3056 ((L'.TRecord domR, _), []) =>
adamc@325 3057 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3058 loc),
adamc@325 3059 t), loc), ran)
adamc@325 3060 | _ => all)
adamc@325 3061 | _ => doPage (fn t => t, t)
adamc@325 3062 end
adamc@255 3063 | _ => all,
adamc@255 3064 E.sgiBinds env all)
adamc@255 3065 in
adamc@255 3066 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3067 end
adamc@255 3068 | _ => sgn
adamc@255 3069 in
adamc@255 3070 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3071 end
adamc@255 3072
adamc@255 3073 | L.DTable (x, c) =>
adamc@255 3074 let
adamc@255 3075 val (c', k, gs') = elabCon (env, denv) c
adamc@255 3076 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@255 3077 in
adamc@255 3078 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@255 3079 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3080 end
adamc@338 3081 | L.DSequence x =>
adamc@338 3082 let
adamc@338 3083 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3084 in
adamc@338 3085 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3086 end
adamc@255 3087
adamc@255 3088 | L.DClass (x, c) =>
adamc@255 3089 let
adamc@255 3090 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@280 3091 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3092 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3093 val env = E.pushClass env n
adamc@255 3094 in
adamc@255 3095 checkKind env c' ck k;
adamc@280 3096 ([(L'.DClass (x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3097 end
adamc@271 3098
adamc@280 3099 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3100
adamc@280 3101 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3102 in
adamc@280 3103 (*prefaces "elabDecl" [("e", SourcePrint.p_decl dAll),
adamc@280 3104 ("|tcs|", PD.string (Int.toString (length tcs)))];*)
adamc@280 3105
adamc@255 3106 r
adamc@255 3107 end
adamc@211 3108
adamc@83 3109 and elabStr (env, denv) (str, loc) =
adamc@31 3110 case str of
adamc@31 3111 L.StrConst ds =>
adamc@31 3112 let
adamc@88 3113 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3114 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3115
adamc@63 3116 val (sgis, _, _, _, _) =
adamc@64 3117 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3118 case sgi of
adamc@64 3119 L'.SgiConAbs (x, n, k) =>
adamc@64 3120 let
adamc@64 3121 val (cons, x) =
adamc@64 3122 if SS.member (cons, x) then
adamc@64 3123 (cons, "?" ^ x)
adamc@64 3124 else
adamc@64 3125 (SS.add (cons, x), x)
adamc@64 3126 in
adamc@64 3127 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3128 end
adamc@64 3129 | L'.SgiCon (x, n, k, c) =>
adamc@64 3130 let
adamc@64 3131 val (cons, x) =
adamc@64 3132 if SS.member (cons, x) then
adamc@64 3133 (cons, "?" ^ x)
adamc@64 3134 else
adamc@64 3135 (SS.add (cons, x), x)
adamc@64 3136 in
adamc@64 3137 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3138 end
adamc@191 3139 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 3140 let
adamc@156 3141 val (cons, x) =
adamc@156 3142 if SS.member (cons, x) then
adamc@156 3143 (cons, "?" ^ x)
adamc@156 3144 else
adamc@156 3145 (SS.add (cons, x), x)
adamc@156 3146
adamc@156 3147 val (xncs, vals) =
adamc@156 3148 ListUtil.foldlMap
adamc@156 3149 (fn ((x, n, t), vals) =>
adamc@156 3150 if SS.member (vals, x) then
adamc@156 3151 (("?" ^ x, n, t), vals)
adamc@156 3152 else
adamc@156 3153 ((x, n, t), SS.add (vals, x)))
adamc@156 3154 vals xncs
adamc@156 3155 in
adamc@191 3156 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3157 end
adamc@191 3158 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3159 let
adamc@156 3160 val (cons, x) =
adamc@156 3161 if SS.member (cons, x) then
adamc@156 3162 (cons, "?" ^ x)
adamc@156 3163 else
adamc@156 3164 (SS.add (cons, x), x)
adamc@156 3165 in
adamc@191 3166 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3167 end
adamc@64 3168 | L'.SgiVal (x, n, c) =>
adamc@64 3169 let
adamc@64 3170 val (vals, x) =
adamc@64 3171 if SS.member (vals, x) then
adamc@64 3172 (vals, "?" ^ x)
adamc@64 3173 else
adamc@64 3174 (SS.add (vals, x), x)
adamc@64 3175 in
adamc@64 3176 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3177 end
adamc@64 3178 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3179 let
adamc@64 3180 val (sgns, x) =
adamc@64 3181 if SS.member (sgns, x) then
adamc@64 3182 (sgns, "?" ^ x)
adamc@64 3183 else
adamc@64 3184 (SS.add (sgns, x), x)
adamc@64 3185 in
adamc@64 3186 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3187 end
adamc@64 3188
adamc@64 3189 | L'.SgiStr (x, n, sgn) =>
adamc@64 3190 let
adamc@64 3191 val (strs, x) =
adamc@64 3192 if SS.member (strs, x) then
adamc@64 3193 (strs, "?" ^ x)
adamc@64 3194 else
adamc@64 3195 (SS.add (strs, x), x)
adamc@64 3196 in
adamc@64 3197 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3198 end
adamc@203 3199 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@205 3200 | L'.SgiTable (tn, x, n, c) =>
adamc@203 3201 let
adamc@203 3202 val (vals, x) =
adamc@203 3203 if SS.member (vals, x) then
adamc@203 3204 (vals, "?" ^ x)
adamc@203 3205 else
adamc@203 3206 (SS.add (vals, x), x)
adamc@203 3207 in
adamc@205 3208 ((L'.SgiTable (tn, x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3209 end
adamc@338 3210 | L'.SgiSequence (tn, x, n) =>
adamc@338 3211 let
adamc@338 3212 val (vals, x) =
adamc@338 3213 if SS.member (vals, x) then
adamc@338 3214 (vals, "?" ^ x)
adamc@338 3215 else
adamc@338 3216 (SS.add (vals, x), x)
adamc@338 3217 in
adamc@338 3218 ((L'.SgiSequence (tn, x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@338 3219 end
adamc@211 3220 | L'.SgiClassAbs (x, n) =>
adamc@211 3221 let
adamc@211 3222 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3223
adamc@211 3224 val (cons, x) =
adamc@211 3225 if SS.member (cons, x) then
adamc@211 3226 (cons, "?" ^ x)
adamc@211 3227 else
adamc@211 3228 (SS.add (cons, x), x)
adamc@211 3229 in
adamc@211 3230 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3231 end
adamc@211 3232 | L'.SgiClass (x, n, c) =>
adamc@211 3233 let
adamc@211 3234 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3235
adamc@211 3236 val (cons, x) =
adamc@211 3237 if SS.member (cons, x) then
adamc@211 3238 (cons, "?" ^ x)
adamc@211 3239 else
adamc@211 3240 (SS.add (cons, x), x)
adamc@211 3241 in
adamc@211 3242 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3243 end)
adamc@64 3244
adamc@63 3245 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3246 in
adamc@83 3247 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3248 end
adamc@31 3249 | L.StrVar x =>
adamc@31 3250 (case E.lookupStr env x of
adamc@31 3251 NONE =>
adamc@31 3252 (strError env (UnboundStr (loc, x));
adamc@83 3253 (strerror, sgnerror, []))
adamc@83 3254 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3255 | L.StrProj (str, x) =>
adamc@34 3256 let
adamc@83 3257 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3258 in
adamc@34 3259 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3260 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3261 (strerror, sgnerror, []))
adamc@83 3262 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3263 end
adamc@41 3264 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3265 let
adamc@83 3266 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3267 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3268 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3269
adamc@83 3270 val (formal, gs3) =
adamc@41 3271 case ranO of
adamc@83 3272 NONE => (actual, [])
adamc@41 3273 | SOME ran =>
adamc@41 3274 let
adamc@83 3275 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3276 in
adamc@86 3277 subSgn (env', denv) actual ran';
adamc@83 3278 (ran', gs)
adamc@41 3279 end
adamc@41 3280 in
adamc@41 3281 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3282 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3283 enD gs1 @ gs2 @ enD gs3)
adamc@41 3284 end
adamc@44 3285 | L.StrApp (str1, str2) =>
adamc@44 3286 let
adamc@83 3287 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3288 val str2 =
adamc@325 3289 case sgn1 of
adamc@325 3290 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3291 wildifyStr env (str2, dom)
adamc@325 3292 | _ => str2
adamc@83 3293 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3294 in
adamc@44 3295 case #1 (hnormSgn env sgn1) of
adamc@83 3296 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3297 | L'.SgnFun (m, n, dom, ran) =>
adamc@86 3298 (subSgn (env, denv) sgn2 dom;
adamc@44 3299 case #1 (hnormSgn env ran) of
adamc@83 3300 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3301 | L'.SgnConst sgis =>
adamc@44 3302 ((L'.StrApp (str1', str2'), loc),
adamc@83 3303 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3304 gs1 @ gs2)
adamc@44 3305 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3306 | _ => (strError env (NotFunctor sgn1);
adamc@83 3307 (strerror, sgnerror, []))
adamc@44 3308 end
adamc@31 3309
adamc@325 3310 fun elabFile basis topStr topSgn env file =
adamc@56 3311 let
adamc@83 3312 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3313 val () = case gs of
adamc@83 3314 [] => ()
adamc@207 3315 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3316 prefaces "Unresolved"
adamc@207 3317 [("c1", p_con env c1),
adamc@207 3318 ("c2", p_con env c2)]) gs;
adamc@207 3319 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3320
adamc@56 3321 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3322 val () = basis_r := basis_n
adamc@56 3323
adamc@88 3324 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
adamc@56 3325
adamc@56 3326 fun discoverC r x =
adamc@56 3327 case E.lookupC env' x of
adamc@56 3328 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3329 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3330 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3331
adamc@56 3332 val () = discoverC int "int"
adamc@56 3333 val () = discoverC float "float"
adamc@56 3334 val () = discoverC string "string"
adamc@203 3335 val () = discoverC table "sql_table"
adamc@56 3336
adamc@325 3337 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3338 val () = case gs of
adamc@325 3339 [] => ()
adamc@325 3340 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3341 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3342 val () = case gs of
adamc@325 3343 [] => ()
adamc@329 3344 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3345 (case D.prove env denv (c1, c2, loc) of
adamc@329 3346 [] => ()
adamc@329 3347 | _ =>
adamc@329 3348 (prefaces "Unresolved constraint in top.ur"
adamc@329 3349 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3350 ("c1", p_con env c1),
adamc@329 3351 ("c2", p_con env c2)];
adamc@329 3352 raise Fail "Unresolve constraint in top.ur"))
adamc@329 3353 | TypeClass _ => raise Fail "Unresolved type class constraint in top.ur") gs
adamc@325 3354 val () = subSgn (env', D.empty) topSgn' topSgn
adamc@325 3355
adamc@325 3356 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@325 3357
adamc@325 3358 val (ds', (env', _)) = dopen (env', D.empty) {str = top_n, strs = [], sgn = topSgn}
adamc@325 3359
adamc@83 3360 fun elabDecl' (d, (env, gs)) =
adamc@76 3361 let
adamc@76 3362 val () = resetKunif ()
adamc@76 3363 val () = resetCunif ()
adamc@88 3364 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3365 in
adamc@76 3366 if ErrorMsg.anyErrors () then
adamc@76 3367 ()
adamc@76 3368 else (
adamc@76 3369 if List.exists kunifsInDecl ds then
adamc@91 3370 declError env (KunifsRemain ds)
adamc@76 3371 else
adamc@76 3372 ();
adamc@76 3373
adamc@76 3374 case ListUtil.search cunifsInDecl ds of
adamc@76 3375 NONE => ()
adamc@76 3376 | SOME loc =>
adamc@91 3377 declError env (CunifsRemain ds)
adamc@76 3378 );
adamc@76 3379
adamc@83 3380 (ds, (env, gs))
adamc@76 3381 end
adamc@76 3382
adamc@83 3383 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3384 in
adamc@84 3385 if ErrorMsg.anyErrors () then
adamc@84 3386 ()
adamc@84 3387 else
adamc@228 3388 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@228 3389 (case D.prove env denv (c1, c2, loc) of
adamc@228 3390 [] => ()
adamc@228 3391 | _ =>
adamc@228 3392 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@228 3393 eprefaces' [("Con 1", p_con env c1),
adamc@228 3394 ("Con 2", p_con env c2),
adamc@228 3395 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@228 3396 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))]))
adamc@228 3397 | TypeClass (env, c, r, loc) =>
adamc@228 3398 case E.resolveClass env c of
adamc@228 3399 SOME e => r := SOME e
adamc@228 3400 | NONE => expError env (Unresolvable (loc, c))) gs;
adamc@83 3401
adamc@325 3402 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 3403 :: ds
adamc@325 3404 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 3405 :: ds' @ file
adamc@56 3406 end
adamc@2 3407
adamc@2 3408 end