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annotate src/elaborate.sml @ 339:075b36dbb1a4

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author Adam Chlipala <adamc@hcoop.net>
date Sun, 14 Sep 2008 15:10:04 -0400
parents e976b187d73a
children 389399d65331
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@172 1324 | _ => raise Fail "isTotal: Not a datatype"
adamc@172 1325 end
adamc@175 1326 | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases t), [])
adamc@172 1327 in
adamc@172 1328 isTotal (combinedCoverage ps, t)
adamc@172 1329 end
adamc@172 1330
adamc@217 1331 fun unmodCon env (c, loc) =
adamc@217 1332 case c of
adamc@217 1333 L'.CNamed n =>
adamc@217 1334 (case E.lookupCNamed env n of
adamc@217 1335 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1336 | _ => (c, loc))
adamc@217 1337 | L'.CModProj (m1, ms, x) =>
adamc@217 1338 let
adamc@217 1339 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1340 in
adamc@217 1341 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1342 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1343 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1344 | _ => (c, loc)
adamc@217 1345 end
adamc@217 1346 | _ => (c, loc)
adamc@217 1347
adamc@217 1348 fun normClassConstraint envs (c, loc) =
adamc@217 1349 case c of
adamc@217 1350 L'.CApp (f, x) =>
adamc@217 1351 let
adamc@217 1352 val f = unmodCon (#1 envs) f
adamc@217 1353 val (x, gs) = hnormCon envs x
adamc@217 1354 in
adamc@217 1355 ((L'.CApp (f, x), loc), gs)
adamc@217 1356 end
adamc@217 1357 | _ => ((c, loc), [])
adamc@216 1358
adamc@92 1359 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1360 let
adamc@280 1361 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@280 1362
adamc@280 1363 val r = case e of
adamc@91 1364 L.EAnnot (e, t) =>
adamc@91 1365 let
adamc@91 1366 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1367 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1368 val gs3 = checkCon (env, denv) e' et t'
adamc@91 1369 in
adamc@228 1370 (e', t', gs1 @ enD gs2 @ enD gs3)
adamc@91 1371 end
adamc@34 1372
adamc@91 1373 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@91 1374 | L.EVar ([], s) =>
adamc@91 1375 (case E.lookupE env s of
adamc@91 1376 E.NotBound =>
adamc@91 1377 (expError env (UnboundExp (loc, s));
adamc@91 1378 (eerror, cerror, []))
adamc@91 1379 | E.Rel (n, t) => ((L'.ERel n, loc), t, [])
adamc@191 1380 | E.Named (n, t) =>
adamc@191 1381 if Char.isUpper (String.sub (s, 0)) then
adamc@191 1382 elabHead (env, denv) (L'.ENamed n, loc) t
adamc@191 1383 else
adamc@191 1384 ((L'.ENamed n, loc), t, []))
adamc@91 1385 | L.EVar (m1 :: ms, s) =>
adamc@91 1386 (case E.lookupStr env m1 of
adamc@91 1387 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1388 (eerror, cerror, []))
adamc@91 1389 | SOME (n, sgn) =>
adamc@91 1390 let
adamc@91 1391 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1392 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1393 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1394 (strerror, sgnerror))
adamc@91 1395 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1396 ((L'.StrVar n, loc), sgn) ms
adamc@10 1397
adamc@91 1398 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1399 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1400 cerror)
adamc@91 1401 | SOME t => t
adamc@91 1402 in
adamc@91 1403 ((L'.EModProj (n, ms, s), loc), t, [])
adamc@91 1404 end)
adamc@86 1405
adamc@211 1406 | L.EApp (e1, (L.EWild, _)) =>
adamc@210 1407 let
adamc@210 1408 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@210 1409 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@210 1410 val (t1, gs3) = hnormCon (env, denv) t1
adamc@210 1411 in
adamc@210 1412 case t1 of
adamc@211 1413 (L'.TFun (dom, ran), _) =>
adamc@216 1414 let
adamc@216 1415 val (dom, gs4) = normClassConstraint (env, denv) dom
adamc@216 1416 in
adamc@216 1417 case E.resolveClass env dom of
adamc@228 1418 NONE =>
adamc@228 1419 let
adamc@228 1420 val r = ref NONE
adamc@228 1421 in
adamc@233 1422 ((L'.EApp (e1', (L'.EUnif r, loc)), loc),
adamc@233 1423 ran, [TypeClass (env, dom, r, loc)])
adamc@228 1424 end
adamc@228 1425 | SOME pf => ((L'.EApp (e1', pf), loc), ran, gs1 @ gs2 @ enD gs3 @ enD gs4)
adamc@216 1426 end
adamc@220 1427 | _ => (expError env (OutOfContext (loc, SOME (e1', t1)));
adamc@211 1428 (eerror, cerror, []))
adamc@210 1429 end
adamc@220 1430 | L.EWild => (expError env (OutOfContext (loc, NONE));
adamc@211 1431 (eerror, cerror, []))
adamc@210 1432
adamc@91 1433 | L.EApp (e1, e2) =>
adamc@91 1434 let
adamc@91 1435 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@91 1436 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@91 1437 val (e2', t2, gs3) = elabExp (env, denv) e2
adamc@71 1438
adamc@91 1439 val dom = cunif (loc, ktype)
adamc@91 1440 val ran = cunif (loc, ktype)
adamc@91 1441 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1442
adamc@91 1443 val gs4 = checkCon (env, denv) e1' t1 t
adamc@91 1444 val gs5 = checkCon (env, denv) e2' t2 dom
adamc@205 1445
adamc@228 1446 val gs = gs1 @ gs2 @ gs3 @ enD gs4 @ enD gs5
adamc@91 1447 in
adamc@205 1448 ((L'.EApp (e1', e2'), loc), ran, gs)
adamc@91 1449 end
adamc@91 1450 | L.EAbs (x, to, e) =>
adamc@91 1451 let
adamc@91 1452 val (t', gs1) = case to of
adamc@91 1453 NONE => (cunif (loc, ktype), [])
adamc@91 1454 | SOME t =>
adamc@91 1455 let
adamc@91 1456 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1457 in
adamc@91 1458 checkKind env t' tk ktype;
adamc@91 1459 (t', gs)
adamc@91 1460 end
adamc@256 1461 val (dom, gs2) = normClassConstraint (env, denv) t'
adamc@256 1462 val (e', et, gs3) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1463 in
adamc@91 1464 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1465 (L'.TFun (t', et), loc),
adamc@256 1466 enD gs1 @ enD gs2 @ gs3)
adamc@91 1467 end
adamc@91 1468 | L.ECApp (e, c) =>
adamc@91 1469 let
adamc@91 1470 val (e', et, gs1) = elabExp (env, denv) e
adamc@328 1471 val oldEt = et
adamc@91 1472 val (e', et, gs2) = elabHead (env, denv) e' et
adamc@91 1473 val (c', ck, gs3) = elabCon (env, denv) c
adamc@91 1474 val ((et', _), gs4) = hnormCon (env, denv) et
adamc@91 1475 in
adamc@91 1476 case et' of
adamc@91 1477 L'.CError => (eerror, cerror, [])
adamc@328 1478 | L'.TCFun (_, x, k, eb) =>
adamc@91 1479 let
adamc@91 1480 val () = checkKind env c' ck k
adamc@91 1481 val eb' = subConInCon (0, c') eb
adamc@339 1482 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1483 cerror)
adamc@91 1484 in
adamc@328 1485 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1486 ("et", p_con env oldEt),
adamc@328 1487 ("x", PD.string x),
adamc@328 1488 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1489 ("c", p_con env c'),
adamc@328 1490 ("eb'", p_con env eb')];*)
adamc@228 1491 ((L'.ECApp (e', c'), loc), eb', gs1 @ gs2 @ enD gs3 @ enD gs4)
adamc@91 1492 end
adamc@91 1493
adamc@91 1494 | _ =>
adamc@91 1495 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1496 (eerror, cerror, []))
adamc@91 1497 end
adamc@91 1498 | L.ECAbs (expl, x, k, e) =>
adamc@91 1499 let
adamc@91 1500 val expl' = elabExplicitness expl
adamc@91 1501 val k' = elabKind k
adamc@328 1502
adamc@328 1503 val env' = E.pushCRel env x k'
adamc@328 1504 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1505 in
adamc@91 1506 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1507 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1508 gs)
adamc@91 1509 end
adamc@91 1510
adamc@91 1511 | L.EDisjoint (c1, c2, e) =>
adamc@91 1512 let
adamc@91 1513 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1514 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1515
adamc@91 1516 val ku1 = kunif loc
adamc@91 1517 val ku2 = kunif loc
adamc@91 1518
adamc@91 1519 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@91 1520 val (e', t, gs4) = elabExp (env, denv') e
adamc@91 1521 in
adamc@91 1522 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1523 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1524
adamc@334 1525 (e', (L'.TDisjoint (L'.LeaveAlone, c1', c2', t), loc), enD gs1 @ enD gs2 @ enD gs3 @ gs4)
adamc@91 1526 end
adamc@91 1527
adamc@91 1528 | L.ERecord xes =>
adamc@91 1529 let
adamc@91 1530 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1531 let
adamc@91 1532 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1533 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1534 in
adamc@91 1535 checkKind env x' xk kname;
adamc@228 1536 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1537 end)
adamc@91 1538 [] xes
adamc@91 1539
adamc@91 1540 val k = (L'.KType, loc)
adamc@91 1541
adamc@91 1542 fun prove (xets, gs) =
adamc@91 1543 case xets of
adamc@91 1544 [] => gs
adamc@91 1545 | (x, _, t) :: rest =>
adamc@91 1546 let
adamc@91 1547 val xc = (x, t)
adamc@91 1548 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1549 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1550 let
adamc@91 1551 val xc' = (x', t')
adamc@91 1552 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1553 in
adamc@91 1554 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1555 end)
adamc@91 1556 gs rest
adamc@91 1557 in
adamc@91 1558 prove (rest, gs)
adamc@91 1559 end
adamc@228 1560
adamc@228 1561 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1562 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1563 in
adamc@255 1564 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1565 ((L'.ERecord xes', loc),
adamc@91 1566 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1567 enD (prove (xes', gsD)) @ gsO)
adamc@91 1568 end
adamc@91 1569
adamc@91 1570 | L.EField (e, c) =>
adamc@91 1571 let
adamc@91 1572 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1573 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1574
adamc@91 1575 val ft = cunif (loc, ktype)
adamc@91 1576 val rest = cunif (loc, ktype_record)
adamc@91 1577 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@91 1578
adamc@91 1579 val gs3 =
adamc@91 1580 checkCon (env, denv) e' et
adamc@91 1581 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@91 1582 val gs4 = D.prove env denv (first, rest, loc)
adamc@91 1583 in
adamc@228 1584 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@91 1585 end
adamc@91 1586
adamc@339 1587 | L.EWith (e1, c, e2) =>
adamc@339 1588 let
adamc@339 1589 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@339 1590 val (c', ck, gs2) = elabCon (env, denv) c
adamc@339 1591 val (e2', e2t, gs3) = elabExp (env, denv) e2
adamc@339 1592
adamc@339 1593 val rest = cunif (loc, ktype_record)
adamc@339 1594 val first = (L'.CRecord (ktype, [(c', e2t)]), loc)
adamc@339 1595
adamc@339 1596 val gs4 = checkCon (env, denv) e1' e1t (L'.TRecord rest, loc)
adamc@339 1597 val gs5 = D.prove env denv (first, rest, loc)
adamc@339 1598 in
adamc@339 1599 ((L'.EWith (e1', c', e2', {field = e2t, rest = rest}), loc),
adamc@339 1600 (L'.TRecord ((L'.CConcat (first, rest), loc)), loc),
adamc@339 1601 gs1 @ enD gs2 @ gs3 @ enD gs4 @ enD gs5)
adamc@339 1602 end
adamc@149 1603 | L.ECut (e, c) =>
adamc@149 1604 let
adamc@149 1605 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1606 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1607
adamc@149 1608 val ft = cunif (loc, ktype)
adamc@149 1609 val rest = cunif (loc, ktype_record)
adamc@149 1610 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@149 1611
adamc@149 1612 val gs3 =
adamc@149 1613 checkCon (env, denv) e' et
adamc@149 1614 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1615 val gs4 = D.prove env denv (first, rest, loc)
adamc@149 1616 in
adamc@228 1617 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@228 1618 gs1 @ enD gs2 @ enD gs3 @ enD gs4)
adamc@149 1619 end
adamc@149 1620
adamc@91 1621 | L.EFold =>
adamc@91 1622 let
adamc@91 1623 val dom = kunif loc
adamc@91 1624 in
adamc@91 1625 ((L'.EFold dom, loc), foldType (dom, loc), [])
adamc@91 1626 end
adamc@170 1627
adamc@171 1628 | L.ECase (e, pes) =>
adamc@171 1629 let
adamc@171 1630 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1631 val result = cunif (loc, (L'.KType, loc))
adamc@171 1632 val (pes', gs) = ListUtil.foldlMap
adamc@171 1633 (fn ((p, e), gs) =>
adamc@171 1634 let
adamc@174 1635 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
adamc@171 1636
adamc@171 1637 val gs1 = checkPatCon (env, denv) p' pt et
adamc@171 1638 val (e', et, gs2) = elabExp (env, denv) e
adamc@171 1639 val gs3 = checkCon (env, denv) e' et result
adamc@171 1640 in
adamc@228 1641 ((p', e'), enD gs1 @ gs2 @ enD gs3 @ gs)
adamc@171 1642 end)
adamc@171 1643 gs1 pes
adamc@172 1644
adamc@172 1645 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
adamc@171 1646 in
adamc@172 1647 if total then
adamc@172 1648 ()
adamc@172 1649 else
adamc@172 1650 expError env (Inexhaustive loc);
adamc@172 1651
adamc@228 1652 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, enD gs' @ gs)
adamc@171 1653 end
adamc@280 1654
adamc@280 1655 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 r)*)
adamc@280 1656 in
adamc@280 1657 (*prefaces "elabExp" [("e", SourcePrint.p_exp eAll),
adamc@280 1658 ("|tcs|", PD.string (Int.toString (length tcs)))];*)
adamc@280 1659 r
adamc@91 1660 end
adamc@31 1661
adamc@42 1662 val hnormSgn = E.hnormSgn
adamc@31 1663
adamc@210 1664 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 1665 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@205 1666
adamc@88 1667 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1668 case sgi of
adamc@76 1669 L.SgiConAbs (x, k) =>
adamc@76 1670 let
adamc@76 1671 val k' = elabKind k
adamc@31 1672
adamc@76 1673 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1674 in
adamc@88 1675 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1676 end
adamc@31 1677
adamc@76 1678 | L.SgiCon (x, ko, c) =>
adamc@76 1679 let
adamc@76 1680 val k' = case ko of
adamc@76 1681 NONE => kunif loc
adamc@76 1682 | SOME k => elabKind k
adamc@31 1683
adamc@83 1684 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1685 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1686 in
adamc@76 1687 checkKind env c' ck k';
adamc@31 1688
adamc@88 1689 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1690 end
adamc@31 1691
adamc@191 1692 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1693 let
adamc@157 1694 val k = (L'.KType, loc)
adamc@191 1695 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1696 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1697 val t = (L'.CNamed n, loc)
adamc@194 1698 val nxs = length xs - 1
adamc@194 1699 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1700
adamc@284 1701 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@284 1702 (E.pushCRel env' x k,
adamc@284 1703 D.enter denv')) (env, denv) xs
adamc@284 1704
adamc@157 1705 val (xcs, (used, env, gs)) =
adamc@157 1706 ListUtil.foldlMap
adamc@157 1707 (fn ((x, to), (used, env, gs)) =>
adamc@157 1708 let
adamc@157 1709 val (to, t, gs') = case to of
adamc@157 1710 NONE => (NONE, t, gs)
adamc@157 1711 | SOME t' =>
adamc@157 1712 let
adamc@284 1713 val (t', tk, gs') = elabCon (env', denv') t'
adamc@157 1714 in
adamc@284 1715 checkKind env' t' tk k;
adamc@157 1716 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1717 end
adamc@191 1718 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1719
adamc@157 1720 val (env, n') = E.pushENamed env x t
adamc@157 1721 in
adamc@157 1722 if SS.member (used, x) then
adamc@157 1723 strError env (DuplicateConstructor (x, loc))
adamc@157 1724 else
adamc@157 1725 ();
adamc@157 1726 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1727 end)
adamc@157 1728 (SS.empty, env, []) xcs
adamc@191 1729
adamc@191 1730 val env = E.pushDatatype env n xs xcs
adamc@157 1731 in
adamc@191 1732 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1733 end
adamc@156 1734
adamc@158 1735 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1736
adamc@158 1737 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1738 (case E.lookupStr env m1 of
adamc@158 1739 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1740 ([], (env, denv, gs)))
adamc@158 1741 | SOME (n, sgn) =>
adamc@158 1742 let
adamc@158 1743 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1744 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1745 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1746 (strerror, sgnerror))
adamc@158 1747 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1748 ((L'.StrVar n, loc), sgn) ms
adamc@158 1749 in
adamc@161 1750 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@161 1751 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@161 1752 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1753 NONE => (conError env (UnboundDatatype (loc, s));
adamc@161 1754 ([], (env, denv, gs)))
adamc@191 1755 | SOME (xs, xncs) =>
adamc@161 1756 let
adamc@161 1757 val k = (L'.KType, loc)
adamc@191 1758 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1759
adamc@161 1760 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1761 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1762 val env = E.pushDatatype env n' xs xncs
adamc@158 1763
adamc@161 1764 val t = (L'.CNamed n', loc)
adamc@161 1765 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1766 let
adamc@161 1767 val t = case to of
adamc@161 1768 NONE => t
adamc@161 1769 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1770
adamc@191 1771 val t = foldr (fn (x, t) =>
adamc@191 1772 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1773 t xs
adamc@161 1774 in
adamc@161 1775 E.pushENamedAs env x n t
adamc@161 1776 end) env xncs
adamc@161 1777 in
adamc@191 1778 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@161 1779 end)
adamc@161 1780 | _ => (strError env (NotDatatype loc);
adamc@161 1781 ([], (env, denv, [])))
adamc@158 1782 end)
adamc@156 1783
adamc@76 1784 | L.SgiVal (x, c) =>
adamc@76 1785 let
adamc@83 1786 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 1787
adamc@76 1788 val (env', n) = E.pushENamed env x c'
adamc@218 1789 val (c', gs'') = normClassConstraint (env, denv) c'
adamc@76 1790 in
adamc@76 1791 (unifyKinds ck ktype
adamc@76 1792 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 1793
adamc@218 1794 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs'' @ gs))
adamc@76 1795 end
adamc@31 1796
adamc@76 1797 | L.SgiStr (x, sgn) =>
adamc@76 1798 let
adamc@83 1799 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1800 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 1801 in
adamc@88 1802 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1803 end
adamc@31 1804
adamc@76 1805 | L.SgiSgn (x, sgn) =>
adamc@76 1806 let
adamc@83 1807 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1808 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 1809 in
adamc@88 1810 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1811 end
adamc@31 1812
adamc@76 1813 | L.SgiInclude sgn =>
adamc@76 1814 let
adamc@83 1815 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1816 in
adamc@76 1817 case #1 (hnormSgn env sgn') of
adamc@76 1818 L'.SgnConst sgis =>
adamc@88 1819 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 1820 | _ => (sgnError env (NotIncludable sgn');
adamc@88 1821 ([], (env, denv, [])))
adamc@88 1822 end
adamc@88 1823
adamc@88 1824 | L.SgiConstraint (c1, c2) =>
adamc@88 1825 let
adamc@88 1826 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 1827 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 1828
adamc@90 1829 val (denv, gs3) = D.assert env denv (c1', c2')
adamc@88 1830 in
adamc@88 1831 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 1832 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 1833
adamc@90 1834 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
adamc@76 1835 end
adamc@31 1836
adamc@203 1837 | L.SgiTable (x, c) =>
adamc@203 1838 let
adamc@203 1839 val (c', k, gs) = elabCon (env, denv) c
adamc@210 1840 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 1841 in
adamc@203 1842 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 1843 ([(L'.SgiTable (!basis_r, x, n, c'), loc)], (env, denv, gs))
adamc@203 1844 end
adamc@203 1845
adamc@338 1846 | L.SgiSequence x =>
adamc@338 1847 let
adamc@338 1848 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 1849 in
adamc@338 1850 ([(L'.SgiSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 1851 end
adamc@338 1852
adamc@211 1853 | L.SgiClassAbs x =>
adamc@211 1854 let
adamc@211 1855 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1856 val (env, n) = E.pushCNamed env x k NONE
adamc@211 1857 val env = E.pushClass env n
adamc@211 1858 in
adamc@211 1859 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
adamc@211 1860 end
adamc@211 1861
adamc@211 1862 | L.SgiClass (x, c) =>
adamc@211 1863 let
adamc@211 1864 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1865 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 1866 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 1867 val env = E.pushClass env n
adamc@211 1868 in
adamc@211 1869 checkKind env c' ck k;
adamc@211 1870 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
adamc@211 1871 end
adamc@211 1872
adamc@83 1873 and elabSgn (env, denv) (sgn, loc) =
adamc@31 1874 case sgn of
adamc@31 1875 L.SgnConst sgis =>
adamc@31 1876 let
adamc@88 1877 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 1878
adamc@62 1879 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 1880 case sgi of
adamc@62 1881 L'.SgiConAbs (x, _, _) =>
adamc@62 1882 (if SS.member (cons, x) then
adamc@62 1883 sgnError env (DuplicateCon (loc, x))
adamc@62 1884 else
adamc@62 1885 ();
adamc@62 1886 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1887 | L'.SgiCon (x, _, _, _) =>
adamc@62 1888 (if SS.member (cons, x) then
adamc@62 1889 sgnError env (DuplicateCon (loc, x))
adamc@62 1890 else
adamc@62 1891 ();
adamc@62 1892 (SS.add (cons, x), vals, sgns, strs))
adamc@191 1893 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 1894 let
adamc@156 1895 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 1896 (if SS.member (vals, x) then
adamc@156 1897 sgnError env (DuplicateVal (loc, x))
adamc@156 1898 else
adamc@156 1899 ();
adamc@156 1900 SS.add (vals, x)))
adamc@156 1901 vals xncs
adamc@156 1902 in
adamc@156 1903 if SS.member (cons, x) then
adamc@156 1904 sgnError env (DuplicateCon (loc, x))
adamc@156 1905 else
adamc@156 1906 ();
adamc@156 1907 (SS.add (cons, x), vals, sgns, strs)
adamc@156 1908 end
adamc@191 1909 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 1910 (if SS.member (cons, x) then
adamc@156 1911 sgnError env (DuplicateCon (loc, x))
adamc@156 1912 else
adamc@156 1913 ();
adamc@156 1914 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1915 | L'.SgiVal (x, _, _) =>
adamc@62 1916 (if SS.member (vals, x) then
adamc@62 1917 sgnError env (DuplicateVal (loc, x))
adamc@62 1918 else
adamc@62 1919 ();
adamc@62 1920 (cons, SS.add (vals, x), sgns, strs))
adamc@62 1921 | L'.SgiSgn (x, _, _) =>
adamc@62 1922 (if SS.member (sgns, x) then
adamc@62 1923 sgnError env (DuplicateSgn (loc, x))
adamc@62 1924 else
adamc@62 1925 ();
adamc@62 1926 (cons, vals, SS.add (sgns, x), strs))
adamc@62 1927 | L'.SgiStr (x, _, _) =>
adamc@62 1928 (if SS.member (strs, x) then
adamc@62 1929 sgnError env (DuplicateStr (loc, x))
adamc@62 1930 else
adamc@62 1931 ();
adamc@88 1932 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 1933 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@205 1934 | L'.SgiTable (_, x, _, _) =>
adamc@203 1935 (if SS.member (vals, x) then
adamc@203 1936 sgnError env (DuplicateVal (loc, x))
adamc@203 1937 else
adamc@203 1938 ();
adamc@211 1939 (cons, SS.add (vals, x), sgns, strs))
adamc@338 1940 | L'.SgiSequence (_, x, _) =>
adamc@338 1941 (if SS.member (vals, x) then
adamc@338 1942 sgnError env (DuplicateVal (loc, x))
adamc@338 1943 else
adamc@338 1944 ();
adamc@338 1945 (cons, SS.add (vals, x), sgns, strs))
adamc@211 1946 | L'.SgiClassAbs (x, _) =>
adamc@211 1947 (if SS.member (cons, x) then
adamc@211 1948 sgnError env (DuplicateCon (loc, x))
adamc@211 1949 else
adamc@211 1950 ();
adamc@211 1951 (SS.add (cons, x), vals, sgns, strs))
adamc@211 1952 | L'.SgiClass (x, _, _) =>
adamc@211 1953 (if SS.member (cons, x) then
adamc@211 1954 sgnError env (DuplicateCon (loc, x))
adamc@211 1955 else
adamc@211 1956 ();
adamc@211 1957 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 1958 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 1959 in
adamc@83 1960 ((L'.SgnConst sgis', loc), gs)
adamc@31 1961 end
adamc@31 1962 | L.SgnVar x =>
adamc@31 1963 (case E.lookupSgn env x of
adamc@31 1964 NONE =>
adamc@31 1965 (sgnError env (UnboundSgn (loc, x));
adamc@83 1966 ((L'.SgnError, loc), []))
adamc@83 1967 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 1968 | L.SgnFun (m, dom, ran) =>
adamc@41 1969 let
adamc@83 1970 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 1971 val (env', n) = E.pushStrNamed env m dom'
adamc@83 1972 val (ran', gs2) = elabSgn (env', denv) ran
adamc@41 1973 in
adamc@83 1974 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 1975 end
adamc@42 1976 | L.SgnWhere (sgn, x, c) =>
adamc@42 1977 let
adamc@83 1978 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 1979 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 1980 in
adamc@42 1981 case #1 (hnormSgn env sgn') of
adamc@83 1982 L'.SgnError => (sgnerror, [])
adamc@42 1983 | L'.SgnConst sgis =>
adamc@75 1984 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 1985 x' = x andalso
adamc@75 1986 (unifyKinds k ck
adamc@75 1987 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 1988 true)
adamc@42 1989 | _ => false) sgis then
adamc@83 1990 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 1991 else
adamc@42 1992 (sgnError env (UnWhereable (sgn', x));
adamc@83 1993 (sgnerror, []))
adamc@42 1994 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 1995 (sgnerror, []))
adamc@42 1996 end
adamc@59 1997 | L.SgnProj (m, ms, x) =>
adamc@59 1998 (case E.lookupStr env m of
adamc@59 1999 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2000 (sgnerror, []))
adamc@59 2001 | SOME (n, sgn) =>
adamc@59 2002 let
adamc@59 2003 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2004 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2005 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2006 (strerror, sgnerror))
adamc@59 2007 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2008 ((L'.StrVar n, loc), sgn) ms
adamc@59 2009 in
adamc@59 2010 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2011 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2012 (sgnerror, []))
adamc@83 2013 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2014 end)
adamc@59 2015
adamc@31 2016
adamc@66 2017 fun selfify env {str, strs, sgn} =
adamc@66 2018 case #1 (hnormSgn env sgn) of
adamc@66 2019 L'.SgnError => sgn
adamc@66 2020 | L'.SgnVar _ => sgn
adamc@66 2021
adamc@66 2022 | L'.SgnConst sgis =>
adamc@66 2023 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2024 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2025 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2026 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@218 2027 | (L'.SgiClassAbs (x, n), loc) =>
adamc@218 2028 (L'.SgiClass (x, n, (L'.CModProj (str, strs, x), loc)), loc)
adamc@66 2029 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2030 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2031 | x => x) sgis), #2 sgn)
adamc@66 2032 | L'.SgnFun _ => sgn
adamc@66 2033 | L'.SgnWhere _ => sgn
adamc@66 2034 | L'.SgnProj (m, ms, x) =>
adamc@66 2035 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2036 (L'.StrVar m, #2 sgn) ms,
adamc@66 2037 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2038 field = x} of
adamc@66 2039 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2040 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2041
adamc@66 2042 fun selfifyAt env {str, sgn} =
adamc@66 2043 let
adamc@66 2044 fun self (str, _) =
adamc@66 2045 case str of
adamc@66 2046 L'.StrVar x => SOME (x, [])
adamc@66 2047 | L'.StrProj (str, x) =>
adamc@66 2048 (case self str of
adamc@66 2049 NONE => NONE
adamc@66 2050 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2051 | _ => NONE
adamc@66 2052 in
adamc@66 2053 case self str of
adamc@66 2054 NONE => sgn
adamc@66 2055 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2056 end
adamc@66 2057
adamc@88 2058 fun dopen (env, denv) {str, strs, sgn} =
adamc@66 2059 let
adamc@66 2060 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2061 (L'.StrVar str, #2 sgn) strs
adamc@66 2062 in
adamc@66 2063 case #1 (hnormSgn env sgn) of
adamc@66 2064 L'.SgnConst sgis =>
adamc@88 2065 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
adamc@162 2066 let
adamc@162 2067 val d =
adamc@162 2068 case sgi of
adamc@162 2069 L'.SgiConAbs (x, n, k) =>
adamc@162 2070 let
adamc@162 2071 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2072 in
adamc@162 2073 (L'.DCon (x, n, k, c), loc)
adamc@162 2074 end
adamc@162 2075 | L'.SgiCon (x, n, k, c) =>
adamc@162 2076 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2077 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2078 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2079 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2080 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2081 | L'.SgiVal (x, n, t) =>
adamc@162 2082 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2083 | L'.SgiStr (x, n, sgn) =>
adamc@162 2084 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2085 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2086 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2087 | L'.SgiConstraint (c1, c2) =>
adamc@162 2088 (L'.DConstraint (c1, c2), loc)
adamc@205 2089 | L'.SgiTable (_, x, n, c) =>
adamc@210 2090 (L'.DVal (x, n, (L'.CApp (tableOf (), c), loc),
adamc@203 2091 (L'.EModProj (str, strs, x), loc)), loc)
adamc@338 2092 | L'.SgiSequence (_, x, n) =>
adamc@338 2093 (L'.DVal (x, n, sequenceOf (),
adamc@338 2094 (L'.EModProj (str, strs, x), loc)), loc)
adamc@211 2095 | L'.SgiClassAbs (x, n) =>
adamc@211 2096 let
adamc@211 2097 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2098 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2099 in
adamc@211 2100 (L'.DCon (x, n, k, c), loc)
adamc@211 2101 end
adamc@211 2102 | L'.SgiClass (x, n, _) =>
adamc@211 2103 let
adamc@211 2104 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2105 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2106 in
adamc@211 2107 (L'.DCon (x, n, k, c), loc)
adamc@211 2108 end
adamc@162 2109 in
adamc@162 2110 (d, (E.declBinds env' d, denv'))
adamc@162 2111 end)
adamc@88 2112 (env, denv) sgis
adamc@66 2113 | _ => (strError env (UnOpenable sgn);
adamc@88 2114 ([], (env, denv)))
adamc@66 2115 end
adamc@66 2116
adamc@88 2117 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@88 2118 case E.lookupStr env str of
adamc@88 2119 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2120 denv)
adamc@88 2121 | SOME (n, sgn) =>
adamc@88 2122 let
adamc@88 2123 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2124 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2125 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2126 (strerror, sgnerror))
adamc@88 2127 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2128 ((L'.StrVar n, loc), sgn) strs
adamc@88 2129
adamc@88 2130 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@88 2131
adamc@88 2132 val denv = case cso of
adamc@88 2133 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2134 denv)
adamc@90 2135 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@90 2136 let
adamc@90 2137 val (denv, gs) = D.assert env denv (c1, c2)
adamc@90 2138 in
adamc@90 2139 case gs of
adamc@90 2140 [] => ()
adamc@90 2141 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
adamc@90 2142
adamc@90 2143 denv
adamc@90 2144 end) denv cs
adamc@88 2145 in
adamc@88 2146 denv
adamc@88 2147 end
adamc@88 2148
adamc@31 2149 fun sgiOfDecl (d, loc) =
adamc@31 2150 case d of
adamc@123 2151 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2152 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2153 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2154 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2155 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2156 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2157 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2158 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2159 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2160 | L'.DExport _ => []
adamc@205 2161 | L'.DTable (tn, x, n, c) => [(L'.SgiTable (tn, x, n, c), loc)]
adamc@338 2162 | L'.DSequence (tn, x, n) => [(L'.SgiSequence (tn, x, n), loc)]
adamc@213 2163 | L'.DClass (x, n, c) => [(L'.SgiClass (x, n, c), loc)]
adamc@271 2164 | L'.DDatabase _ => []
adamc@88 2165
adamc@88 2166 fun sgiBindsD (env, denv) (sgi, _) =
adamc@88 2167 case sgi of
adamc@90 2168 L'.SgiConstraint (c1, c2) =>
adamc@90 2169 (case D.assert env denv (c1, c2) of
adamc@90 2170 (denv, []) => denv
adamc@90 2171 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
adamc@88 2172 | _ => denv
adamc@31 2173
adamc@86 2174 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
adamc@35 2175 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2176 (L'.SgnError, _) => ()
adamc@31 2177 | (_, L'.SgnError) => ()
adamc@31 2178
adamc@31 2179 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2180 let
adamc@156 2181 fun folder (sgi2All as (sgi, loc), (env, denv)) =
adamc@31 2182 let
adamc@31 2183 fun seek p =
adamc@31 2184 let
adamc@88 2185 fun seek (env, denv) ls =
adamc@31 2186 case ls of
adamc@31 2187 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@88 2188 (env, denv))
adamc@31 2189 | h :: t =>
adamc@31 2190 case p h of
adamc@88 2191 NONE => seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
adamc@88 2192 | SOME envs => envs
adamc@31 2193 in
adamc@88 2194 seek (env, denv) sgis1
adamc@31 2195 end
adamc@31 2196 in
adamc@31 2197 case sgi of
adamc@31 2198 L'.SgiConAbs (x, n2, k2) =>
adamc@31 2199 seek (fn sgi1All as (sgi1, _) =>
adamc@31 2200 let
adamc@41 2201 fun found (x', n1, k1, co1) =
adamc@41 2202 if x = x' then
adamc@41 2203 let
adamc@41 2204 val () = unifyKinds k1 k2
adamc@41 2205 handle KUnify (k1, k2, err) =>
adamc@41 2206 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2207 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2208 in
adamc@41 2209 SOME (if n1 = n2 then
adamc@41 2210 env
adamc@41 2211 else
adamc@88 2212 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
adamc@88 2213 denv)
adamc@41 2214 end
adamc@41 2215 else
adamc@41 2216 NONE
adamc@31 2217 in
adamc@31 2218 case sgi1 of
adamc@41 2219 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2220 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2221 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2222 let
adamc@191 2223 val k = (L'.KType, loc)
adamc@191 2224 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2225 in
adamc@191 2226 found (x', n1, k', NONE)
adamc@191 2227 end
adamc@191 2228 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2229 let
adamc@191 2230 val k = (L'.KType, loc)
adamc@191 2231 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2232 in
adamc@191 2233 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2234 end
adamc@211 2235 | L'.SgiClassAbs (x', n1) => found (x', n1,
adamc@218 2236 (L'.KArrow ((L'.KType, loc),
adamc@218 2237 (L'.KType, loc)), loc),
adamc@218 2238 NONE)
adamc@211 2239 | L'.SgiClass (x', n1, c) => found (x', n1,
adamc@211 2240 (L'.KArrow ((L'.KType, loc),
adamc@211 2241 (L'.KType, loc)), loc),
adamc@211 2242 SOME c)
adamc@31 2243 | _ => NONE
adamc@31 2244 end)
adamc@31 2245
adamc@31 2246 | L'.SgiCon (x, n2, k2, c2) =>
adamc@31 2247 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2248 let
adamc@211 2249 fun found (x', n1, k1, c1) =
adamc@211 2250 if x = x' then
adamc@211 2251 let
adamc@327 2252 fun good () =
adamc@327 2253 let
adamc@327 2254 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2255 val env = if n1 = n2 then
adamc@327 2256 env
adamc@327 2257 else
adamc@327 2258 E.pushCNamedAs env x n1 k1 (SOME c1)
adamc@327 2259 in
adamc@327 2260 SOME (env, denv)
adamc@327 2261 end
adamc@211 2262 in
adamc@211 2263 (case unifyCons (env, denv) c1 c2 of
adamc@211 2264 [] => good ()
adamc@211 2265 | _ => NONE)
adamc@211 2266 handle CUnify (c1, c2, err) =>
adamc@211 2267 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2268 good ())
adamc@211 2269 end
adamc@211 2270 else
adamc@211 2271 NONE
adamc@211 2272 in
adamc@211 2273 case sgi1 of
adamc@211 2274 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2275 | L'.SgiClass (x', n1, c1) =>
adamc@211 2276 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
adamc@211 2277 | _ => NONE
adamc@211 2278 end)
adamc@31 2279
adamc@191 2280 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@156 2281 seek (fn sgi1All as (sgi1, _) =>
adamc@160 2282 let
adamc@191 2283 fun found (n1, xs1, xncs1) =
adamc@160 2284 let
adamc@160 2285 fun mismatched ue =
adamc@160 2286 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@160 2287 SOME (env, denv))
adamc@156 2288
adamc@191 2289 val k = (L'.KType, loc)
adamc@191 2290 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2291
adamc@160 2292 fun good () =
adamc@160 2293 let
adamc@160 2294 val env = E.sgiBinds env sgi2All
adamc@160 2295 val env = if n1 = n2 then
adamc@160 2296 env
adamc@160 2297 else
adamc@160 2298 E.pushCNamedAs env x n1 (L'.KType, loc)
adamc@160 2299 (SOME (L'.CNamed n1, loc))
adamc@160 2300 in
adamc@160 2301 SOME (env, denv)
adamc@160 2302 end
adamc@156 2303
adamc@191 2304 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2305 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2306 String.compare (x1, x2) <> EQUAL
adamc@160 2307 orelse case (t1, t2) of
adamc@160 2308 (NONE, NONE) => false
adamc@160 2309 | (SOME t1, SOME t2) =>
adamc@160 2310 not (List.null (unifyCons (env, denv) t1 t2))
adamc@160 2311 | _ => true
adamc@160 2312 in
adamc@191 2313 (if xs1 <> xs2
adamc@191 2314 orelse length xncs1 <> length xncs2
adamc@160 2315 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2316 mismatched NONE
adamc@160 2317 else
adamc@160 2318 good ())
adamc@160 2319 handle CUnify ue => mismatched (SOME ue)
adamc@160 2320 end
adamc@160 2321 in
adamc@160 2322 case sgi1 of
adamc@191 2323 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2324 if x' = x then
adamc@191 2325 found (n1, xs, xncs1)
adamc@160 2326 else
adamc@160 2327 NONE
adamc@191 2328 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2329 if x' = x then
adamc@191 2330 found (n1, xs, xncs1)
adamc@162 2331 else
adamc@162 2332 NONE
adamc@160 2333 | _ => NONE
adamc@160 2334 end)
adamc@156 2335
adamc@191 2336 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@158 2337 seek (fn sgi1All as (sgi1, _) =>
adamc@158 2338 case sgi1 of
adamc@191 2339 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2340 if x = x' then
adamc@158 2341 let
adamc@158 2342 val k = (L'.KType, loc)
adamc@191 2343 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2344 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2345 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2346
adamc@158 2347 fun good () =
adamc@158 2348 let
adamc@191 2349 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2350 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2351 in
adamc@158 2352 SOME (env, denv)
adamc@158 2353 end
adamc@158 2354 in
adamc@158 2355 (case unifyCons (env, denv) t1 t2 of
adamc@158 2356 [] => good ()
adamc@158 2357 | _ => NONE)
adamc@158 2358 handle CUnify (c1, c2, err) =>
adamc@158 2359 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2360 good ())
adamc@158 2361 end
adamc@158 2362 else
adamc@158 2363 NONE
adamc@158 2364
adamc@158 2365 | _ => NONE)
adamc@156 2366
adamc@32 2367 | L'.SgiVal (x, n2, c2) =>
adamc@32 2368 seek (fn sgi1All as (sgi1, _) =>
adamc@32 2369 case sgi1 of
adamc@41 2370 L'.SgiVal (x', n1, c1) =>
adamc@41 2371 if x = x' then
adamc@86 2372 (case unifyCons (env, denv) c1 c2 of
adamc@88 2373 [] => SOME (env, denv)
adamc@86 2374 | _ => NONE)
adamc@86 2375 handle CUnify (c1, c2, err) =>
adamc@86 2376 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@88 2377 SOME (env, denv))
adamc@41 2378 else
adamc@41 2379 NONE
adamc@205 2380 | L'.SgiTable (_, x', n1, c1) =>
adamc@203 2381 if x = x' then
adamc@210 2382 (case unifyCons (env, denv) (L'.CApp (tableOf (), c1), loc) c2 of
adamc@203 2383 [] => SOME (env, denv)
adamc@203 2384 | _ => NONE)
adamc@203 2385 handle CUnify (c1, c2, err) =>
adamc@203 2386 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2387 SOME (env, denv))
adamc@203 2388 else
adamc@203 2389 NONE
adamc@338 2390 | L'.SgiSequence (_, x', n1) =>
adamc@338 2391 if x = x' then
adamc@338 2392 (case unifyCons (env, denv) (sequenceOf ()) c2 of
adamc@338 2393 [] => SOME (env, denv)
adamc@338 2394 | _ => NONE)
adamc@338 2395 handle CUnify (c1, c2, err) =>
adamc@338 2396 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@338 2397 SOME (env, denv))
adamc@338 2398 else
adamc@338 2399 NONE
adamc@32 2400 | _ => NONE)
adamc@32 2401
adamc@33 2402 | L'.SgiStr (x, n2, sgn2) =>
adamc@33 2403 seek (fn sgi1All as (sgi1, _) =>
adamc@33 2404 case sgi1 of
adamc@41 2405 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2406 if x = x' then
adamc@66 2407 let
adamc@86 2408 val () = subSgn (env, denv) sgn1 sgn2
adamc@66 2409 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2410 val env = if n1 = n2 then
adamc@66 2411 env
adamc@66 2412 else
adamc@66 2413 E.pushStrNamedAs env x n2
adamc@66 2414 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2415 sgn = sgn2})
adamc@66 2416 in
adamc@88 2417 SOME (env, denv)
adamc@66 2418 end
adamc@41 2419 else
adamc@41 2420 NONE
adamc@33 2421 | _ => NONE)
adamc@59 2422
adamc@59 2423 | L'.SgiSgn (x, n2, sgn2) =>
adamc@59 2424 seek (fn sgi1All as (sgi1, _) =>
adamc@59 2425 case sgi1 of
adamc@59 2426 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2427 if x = x' then
adamc@65 2428 let
adamc@86 2429 val () = subSgn (env, denv) sgn1 sgn2
adamc@86 2430 val () = subSgn (env, denv) sgn2 sgn1
adamc@65 2431
adamc@65 2432 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2433 val env = if n1 = n2 then
adamc@65 2434 env
adamc@65 2435 else
adamc@65 2436 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2437 in
adamc@88 2438 SOME (env, denv)
adamc@65 2439 end
adamc@59 2440 else
adamc@59 2441 NONE
adamc@59 2442 | _ => NONE)
adamc@88 2443
adamc@88 2444 | L'.SgiConstraint (c2, d2) =>
adamc@88 2445 seek (fn sgi1All as (sgi1, _) =>
adamc@88 2446 case sgi1 of
adamc@88 2447 L'.SgiConstraint (c1, d1) =>
adamc@88 2448 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
adamc@90 2449 let
adamc@90 2450 val (denv, gs) = D.assert env denv (c2, d2)
adamc@90 2451 in
adamc@90 2452 case gs of
adamc@90 2453 [] => ()
adamc@90 2454 | _ => raise Fail "subSgn: Sub-constraints remain";
adamc@90 2455
adamc@90 2456 SOME (env, denv)
adamc@90 2457 end
adamc@88 2458 else
adamc@88 2459 NONE
adamc@88 2460 | _ => NONE)
adamc@203 2461
adamc@205 2462 | L'.SgiTable (_, x, n2, c2) =>
adamc@203 2463 seek (fn sgi1All as (sgi1, _) =>
adamc@203 2464 case sgi1 of
adamc@205 2465 L'.SgiTable (_, x', n1, c1) =>
adamc@203 2466 if x = x' then
adamc@203 2467 (case unifyCons (env, denv) c1 c2 of
adamc@203 2468 [] => SOME (env, denv)
adamc@203 2469 | _ => NONE)
adamc@203 2470 handle CUnify (c1, c2, err) =>
adamc@203 2471 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2472 SOME (env, denv))
adamc@203 2473 else
adamc@203 2474 NONE
adamc@203 2475 | _ => NONE)
adamc@211 2476
adamc@338 2477 | L'.SgiSequence (_, x, n2) =>
adamc@338 2478 seek (fn sgi1All as (sgi1, _) =>
adamc@338 2479 case sgi1 of
adamc@338 2480 L'.SgiSequence (_, x', n1) =>
adamc@338 2481 if x = x' then
adamc@338 2482 SOME (env, denv)
adamc@338 2483 else
adamc@338 2484 NONE
adamc@338 2485 | _ => NONE)
adamc@338 2486
adamc@211 2487 | L'.SgiClassAbs (x, n2) =>
adamc@211 2488 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2489 let
adamc@211 2490 fun found (x', n1, co) =
adamc@211 2491 if x = x' then
adamc@211 2492 let
adamc@211 2493 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2494 val env = E.pushCNamedAs env x n1 k co
adamc@211 2495 in
adamc@211 2496 SOME (if n1 = n2 then
adamc@211 2497 env
adamc@211 2498 else
adamc@211 2499 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
adamc@211 2500 denv)
adamc@211 2501 end
adamc@211 2502 else
adamc@211 2503 NONE
adamc@211 2504 in
adamc@211 2505 case sgi1 of
adamc@211 2506 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
adamc@211 2507 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
adamc@211 2508 | _ => NONE
adamc@211 2509 end)
adamc@211 2510 | L'.SgiClass (x, n2, c2) =>
adamc@211 2511 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2512 let
adamc@211 2513 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2514
adamc@211 2515 fun found (x', n1, c1) =
adamc@211 2516 if x = x' then
adamc@211 2517 let
adamc@218 2518 fun good () =
adamc@218 2519 let
adamc@218 2520 val env = E.pushCNamedAs env x n2 k (SOME c2)
adamc@218 2521 val env = if n1 = n2 then
adamc@218 2522 env
adamc@218 2523 else
adamc@218 2524 E.pushCNamedAs env x n1 k (SOME c1)
adamc@218 2525 in
adamc@218 2526 SOME (env, denv)
adamc@218 2527 end
adamc@211 2528 in
adamc@211 2529 (case unifyCons (env, denv) c1 c2 of
adamc@211 2530 [] => good ()
adamc@211 2531 | _ => NONE)
adamc@211 2532 handle CUnify (c1, c2, err) =>
adamc@211 2533 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2534 good ())
adamc@211 2535 end
adamc@211 2536 else
adamc@211 2537 NONE
adamc@211 2538 in
adamc@211 2539 case sgi1 of
adamc@211 2540 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
adamc@211 2541 | _ => NONE
adamc@211 2542 end)
adamc@31 2543 end
adamc@31 2544 in
adamc@88 2545 ignore (foldl folder (env, denv) sgis2)
adamc@31 2546 end
adamc@31 2547
adamc@41 2548 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2549 let
adamc@43 2550 val ran1 =
adamc@43 2551 if n1 = n2 then
adamc@43 2552 ran1
adamc@43 2553 else
adamc@43 2554 subStrInSgn (n1, n2) ran1
adamc@43 2555 in
adamc@86 2556 subSgn (env, denv) dom2 dom1;
adamc@86 2557 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
adamc@43 2558 end
adamc@41 2559
adamc@41 2560 | _ => sgnError env (SgnWrongForm (sgn1, sgn2))
adamc@41 2561
adamc@61 2562
adamc@312 2563 fun positive self =
adamc@312 2564 let
adamc@312 2565 open L
adamc@312 2566
adamc@312 2567 fun none (c, _) =
adamc@312 2568 case c of
adamc@312 2569 CAnnot (c, _) => none c
adamc@312 2570
adamc@312 2571 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 2572 | TCFun (_, _, _, c) => none c
adamc@312 2573 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2574 | TRecord c => none c
adamc@312 2575
adamc@312 2576 | CVar ([], x) => x <> self
adamc@312 2577 | CVar _ => true
adamc@312 2578 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 2579 | CAbs _ => false
adamc@312 2580 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2581
adamc@312 2582 | CName _ => true
adamc@312 2583
adamc@312 2584 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 2585 | CConcat (c1, c2) => none c1 andalso none c2
adamc@312 2586 | CFold => true
adamc@312 2587
adamc@312 2588 | CUnit => true
adamc@312 2589
adamc@312 2590 | CTuple cs => List.all none cs
adamc@312 2591 | CProj (c, _) => none c
adamc@312 2592
adamc@312 2593 | CWild _ => false
adamc@312 2594
adamc@312 2595 fun pos (c, _) =
adamc@312 2596 case c of
adamc@312 2597 CAnnot (c, _) => pos c
adamc@312 2598
adamc@312 2599 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 2600 | TCFun (_, _, _, c) => pos c
adamc@312 2601 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2602 | TRecord c => pos c
adamc@312 2603
adamc@312 2604 | CVar _ => true
adamc@312 2605 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 2606 | CAbs _ => false
adamc@312 2607 | CDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2608
adamc@312 2609 | CName _ => true
adamc@312 2610
adamc@312 2611 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 2612 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@312 2613 | CFold => true
adamc@312 2614
adamc@312 2615 | CUnit => true
adamc@312 2616
adamc@312 2617 | CTuple cs => List.all pos cs
adamc@312 2618 | CProj (c, _) => pos c
adamc@312 2619
adamc@312 2620 | CWild _ => false
adamc@312 2621 in
adamc@312 2622 pos
adamc@312 2623 end
adamc@312 2624
adamc@325 2625 fun wildifyStr env (str, sgn) =
adamc@325 2626 case #1 (hnormSgn env sgn) of
adamc@325 2627 L'.SgnConst sgis =>
adamc@325 2628 (case #1 str of
adamc@325 2629 L.StrConst ds =>
adamc@325 2630 let
adamc@325 2631 fun decompileCon env (c, loc) =
adamc@325 2632 case c of
adamc@325 2633 L'.CRel i =>
adamc@325 2634 let
adamc@325 2635 val (s, _) = E.lookupCRel env i
adamc@325 2636 in
adamc@325 2637 SOME (L.CVar ([], s), loc)
adamc@325 2638 end
adamc@325 2639 | L'.CNamed i =>
adamc@325 2640 let
adamc@325 2641 val (s, _, _) = E.lookupCNamed env i
adamc@325 2642 in
adamc@325 2643 SOME (L.CVar ([], s), loc)
adamc@325 2644 end
adamc@325 2645 | L'.CModProj (m1, ms, x) =>
adamc@325 2646 let
adamc@325 2647 val (s, _) = E.lookupStrNamed env m1
adamc@325 2648 in
adamc@325 2649 SOME (L.CVar (s :: ms, x), loc)
adamc@325 2650 end
adamc@325 2651 | L'.CName s => SOME (L.CName s, loc)
adamc@325 2652 | L'.CRecord (_, xcs) =>
adamc@325 2653 let
adamc@325 2654 fun fields xcs =
adamc@325 2655 case xcs of
adamc@325 2656 [] => SOME []
adamc@325 2657 | (x, t) :: xcs =>
adamc@325 2658 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 2659 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 2660 | _ => NONE
adamc@325 2661 in
adamc@325 2662 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 2663 (fields xcs)
adamc@325 2664 end
adamc@325 2665 | L'.CConcat (c1, c2) =>
adamc@325 2666 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 2667 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 2668 | _ => NONE)
adamc@325 2669 | L'.CUnit => SOME (L.CUnit, loc)
adamc@325 2670
adamc@325 2671 | _ => NONE
adamc@325 2672
adamc@325 2673 val (needed, constraints, _) =
adamc@325 2674 foldl (fn ((sgi, loc), (needed, constraints, env')) =>
adamc@325 2675 let
adamc@325 2676 val (needed, constraints) =
adamc@325 2677 case sgi of
adamc@325 2678 L'.SgiConAbs (x, _, _) => (SS.add (needed, x), constraints)
adamc@325 2679 | L'.SgiConstraint cs => (needed, (env', cs, loc) :: constraints)
adamc@325 2680 | _ => (needed, constraints)
adamc@325 2681 in
adamc@325 2682 (needed, constraints, E.sgiBinds env' (sgi, loc))
adamc@325 2683 end)
adamc@325 2684 (SS.empty, [], env) sgis
adamc@325 2685
adamc@325 2686 val needed = foldl (fn ((d, _), needed) =>
adamc@325 2687 case d of
adamc@325 2688 L.DCon (x, _, _) => (SS.delete (needed, x)
adamc@325 2689 handle NotFound =>
adamc@325 2690 needed)
adamc@325 2691 | L.DClass (x, _) => (SS.delete (needed, x)
adamc@325 2692 handle NotFound => needed)
adamc@325 2693 | L.DOpen _ => SS.empty
adamc@325 2694 | _ => needed)
adamc@325 2695 needed ds
adamc@325 2696
adamc@325 2697 val cds = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 2698 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 2699 (SOME c1, SOME c2) =>
adamc@325 2700 SOME (L.DConstraint (c1, c2), loc)
adamc@325 2701 | _ => NONE) constraints
adamc@325 2702 in
adamc@325 2703 case SS.listItems needed of
adamc@325 2704 [] => (L.StrConst (ds @ cds), #2 str)
adamc@325 2705 | xs =>
adamc@325 2706 let
adamc@325 2707 val kwild = (L.KWild, #2 str)
adamc@325 2708 val cwild = (L.CWild kwild, #2 str)
adamc@325 2709 val ds' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
adamc@325 2710 in
adamc@325 2711 (L.StrConst (ds @ ds' @ cds), #2 str)
adamc@325 2712 end
adamc@325 2713 end
adamc@325 2714 | _ => str)
adamc@325 2715 | _ => str
adamc@325 2716
adamc@334 2717 val makeInstantiable =
adamc@334 2718 let
adamc@334 2719 fun kind k = k
adamc@334 2720 fun con c =
adamc@334 2721 case c of
adamc@334 2722 L'.TDisjoint (L'.LeaveAlone, c1, c2, c) => L'.TDisjoint (L'.Instantiate, c1, c2, c)
adamc@334 2723 | _ => c
adamc@334 2724 in
adamc@334 2725 U.Con.map {kind = kind, con = con}
adamc@334 2726 end
adamc@334 2727
adamc@280 2728 fun elabDecl (dAll as (d, loc), (env, denv, gs : constraint list)) =
adamc@255 2729 let
adamc@255 2730 (*val () = preface ("elabDecl", SourcePrint.p_decl (d, loc))*)
adamc@255 2731
adamc@255 2732 val r =
adamc@255 2733 case d of
adamc@255 2734 L.DCon (x, ko, c) =>
adamc@255 2735 let
adamc@255 2736 val k' = case ko of
adamc@255 2737 NONE => kunif loc
adamc@255 2738 | SOME k => elabKind k
adamc@255 2739
adamc@255 2740 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 2741 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 2742 in
adamc@255 2743 checkKind env c' ck k';
adamc@255 2744
adamc@255 2745 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2746 end
adamc@255 2747 | L.DDatatype (x, xs, xcs) =>
adamc@255 2748 let
adamc@312 2749 val positive = List.all (fn (_, to) =>
adamc@312 2750 case to of
adamc@312 2751 NONE => true
adamc@312 2752 | SOME t => positive x t) xcs
adamc@312 2753
adamc@255 2754 val k = (L'.KType, loc)
adamc@255 2755 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2756 val (env, n) = E.pushCNamed env x k' NONE
adamc@255 2757 val t = (L'.CNamed n, loc)
adamc@255 2758 val nxs = length xs - 1
adamc@255 2759 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@255 2760
adamc@255 2761 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@255 2762 (E.pushCRel env' x k,
adamc@255 2763 D.enter denv')) (env, denv) xs
adamc@255 2764
adamc@255 2765 val (xcs, (used, env, gs')) =
adamc@255 2766 ListUtil.foldlMap
adamc@255 2767 (fn ((x, to), (used, env, gs)) =>
adamc@255 2768 let
adamc@255 2769 val (to, t, gs') = case to of
adamc@255 2770 NONE => (NONE, t, gs)
adamc@255 2771 | SOME t' =>
adamc@255 2772 let
adamc@255 2773 val (t', tk, gs') = elabCon (env', denv') t'
adamc@255 2774 in
adamc@255 2775 checkKind env' t' tk k;
adamc@255 2776 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@255 2777 end
adamc@255 2778 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@255 2779
adamc@255 2780 val (env, n') = E.pushENamed env x t
adamc@255 2781 in
adamc@255 2782 if SS.member (used, x) then
adamc@255 2783 strError env (DuplicateConstructor (x, loc))
adamc@255 2784 else
adamc@255 2785 ();
adamc@255 2786 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@255 2787 end)
adamc@255 2788 (SS.empty, env, []) xcs
adamc@255 2789
adamc@255 2790 val env = E.pushDatatype env n xs xcs
adamc@312 2791 val d' = (L'.DDatatype (x, n, xs, xcs), loc)
adamc@255 2792 in
adamc@312 2793 if positive then
adamc@312 2794 ()
adamc@312 2795 else
adamc@312 2796 declError env (Nonpositive d');
adamc@312 2797
adamc@312 2798 ([d'], (env, denv, gs' @ gs))
adamc@255 2799 end
adamc@255 2800
adamc@255 2801 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 2802
adamc@255 2803 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 2804 (case E.lookupStr env m1 of
adamc@255 2805 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 2806 ([], (env, denv, gs)))
adamc@255 2807 | SOME (n, sgn) =>
adamc@255 2808 let
adamc@255 2809 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 2810 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 2811 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 2812 (strerror, sgnerror))
adamc@255 2813 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 2814 ((L'.StrVar n, loc), sgn) ms
adamc@255 2815 in
adamc@255 2816 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@255 2817 ((L'.CModProj (n, ms, s), _), gs') =>
adamc@255 2818 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 2819 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 2820 ([], (env, denv, gs)))
adamc@255 2821 | SOME (xs, xncs) =>
adamc@255 2822 let
adamc@255 2823 val k = (L'.KType, loc)
adamc@255 2824 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2825 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 2826 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 2827 val env = E.pushDatatype env n' xs xncs
adamc@255 2828
adamc@255 2829 val t = (L'.CNamed n', loc)
adamc@255 2830 val env = foldl (fn ((x, n, to), env) =>
adamc@255 2831 let
adamc@255 2832 val t = case to of
adamc@255 2833 NONE => t
adamc@255 2834 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 2835
adamc@255 2836 val t = foldr (fn (x, t) =>
adamc@255 2837 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 2838 t xs
adamc@255 2839 in
adamc@255 2840 E.pushENamedAs env x n t
adamc@255 2841 end) env xncs
adamc@255 2842 in
adamc@255 2843 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, enD gs' @ gs))
adamc@255 2844 end)
adamc@255 2845 | _ => (strError env (NotDatatype loc);
adamc@255 2846 ([], (env, denv, [])))
adamc@255 2847 end)
adamc@255 2848
adamc@255 2849 | L.DVal (x, co, e) =>
adamc@255 2850 let
adamc@255 2851 val (c', _, gs1) = case co of
adamc@255 2852 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2853 | SOME c => elabCon (env, denv) c
adamc@255 2854
adamc@255 2855 val (e', et, gs2) = elabExp (env, denv) e
adamc@255 2856 val gs3 = checkCon (env, denv) e' et c'
adamc@255 2857 val (c', gs4) = normClassConstraint (env, denv) c'
adamc@255 2858 val (env', n) = E.pushENamed env x c'
adamc@334 2859 val c' = makeInstantiable c'
adamc@255 2860 in
adamc@255 2861 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@255 2862 ("c'", p_con env c')];*)
adamc@255 2863 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ enD gs3 @ enD gs4 @ gs))
adamc@255 2864 end
adamc@255 2865 | L.DValRec vis =>
adamc@255 2866 let
adamc@255 2867 fun allowable (e, _) =
adamc@255 2868 case e of
adamc@255 2869 L.EAbs _ => true
adamc@255 2870 | L.ECAbs (_, _, _, e) => allowable e
adamc@255 2871 | L.EDisjoint (_, _, e) => allowable e
adamc@255 2872 | _ => false
adamc@255 2873
adamc@255 2874 val (vis, gs) = ListUtil.foldlMap
adamc@255 2875 (fn ((x, co, e), gs) =>
adamc@255 2876 let
adamc@255 2877 val (c', _, gs1) = case co of
adamc@255 2878 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 2879 | SOME c => elabCon (env, denv) c
adamc@255 2880 in
adamc@255 2881 ((x, c', e), enD gs1 @ gs)
adamc@280 2882 end) gs vis
adamc@255 2883
adamc@255 2884 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 2885 let
adamc@255 2886 val (env, n) = E.pushENamed env x c'
adamc@255 2887 in
adamc@255 2888 ((x, n, c', e), env)
adamc@255 2889 end) env vis
adamc@255 2890
adamc@255 2891 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 2892 let
adamc@255 2893 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 2894
adamc@255 2895 val gs2 = checkCon (env, denv) e' et c'
adamc@334 2896
adamc@334 2897 val c' = makeInstantiable c'
adamc@255 2898 in
adamc@255 2899 if allowable e then
adamc@255 2900 ()
adamc@255 2901 else
adamc@255 2902 expError env (IllegalRec (x, e'));
adamc@255 2903 ((x, n, c', e'), gs1 @ enD gs2 @ gs)
adamc@255 2904 end) gs vis
adamc@255 2905 in
adamc@255 2906 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 2907 end
adamc@255 2908
adamc@255 2909 | L.DSgn (x, sgn) =>
adamc@255 2910 let
adamc@255 2911 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 2912 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 2913 in
adamc@255 2914 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2915 end
adamc@255 2916
adamc@255 2917 | L.DStr (x, sgno, str) =>
adamc@255 2918 let
adamc@255 2919 val () = if x = "Basis" then
adamc@255 2920 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 2921 else
adamc@255 2922 ()
adamc@255 2923
adamc@255 2924 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 2925
adamc@255 2926 val (str', sgn', gs') =
adamc@255 2927 case formal of
adamc@255 2928 NONE =>
adamc@255 2929 let
adamc@255 2930 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 2931 in
adamc@255 2932 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 2933 end
adamc@255 2934 | SOME (formal, gs1) =>
adamc@255 2935 let
adamc@325 2936 val str = wildifyStr env (str, formal)
adamc@255 2937 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 2938 in
adamc@255 2939 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 2940 (str', formal, enD gs1 @ gs2)
adamc@255 2941 end
adamc@255 2942
adamc@255 2943 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 2944 in
adamc@255 2945 case #1 (hnormSgn env sgn') of
adamc@255 2946 L'.SgnFun _ =>
adamc@255 2947 (case #1 str' of
adamc@255 2948 L'.StrFun _ => ()
adamc@255 2949 | _ => strError env (FunctorRebind loc))
adamc@255 2950 | _ => ();
adamc@255 2951
adamc@255 2952 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@255 2953 end
adamc@255 2954
adamc@255 2955 | L.DFfiStr (x, sgn) =>
adamc@255 2956 let
adamc@255 2957 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 2958
adamc@255 2959 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 2960 in
adamc@255 2961 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2962 end
adamc@255 2963
adamc@255 2964 | L.DOpen (m, ms) =>
adamc@255 2965 (case E.lookupStr env m of
adamc@255 2966 NONE => (strError env (UnboundStr (loc, m));
adamc@255 2967 ([], (env, denv, gs)))
adamc@255 2968 | SOME (n, sgn) =>
adamc@255 2969 let
adamc@255 2970 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 2971 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@255 2972 NONE => (strError env (UnboundStr (loc, m));
adamc@255 2973 (strerror, sgnerror))
adamc@255 2974 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 2975 ((L'.StrVar n, loc), sgn) ms
adamc@255 2976
adamc@255 2977 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
adamc@255 2978 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
adamc@255 2979 in
adamc@255 2980 (ds, (env', denv', gs))
adamc@255 2981 end)
adamc@255 2982
adamc@255 2983 | L.DConstraint (c1, c2) =>
adamc@255 2984 let
adamc@255 2985 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 2986 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 2987 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 2988
adamc@255 2989 val (denv', gs4) = D.assert env denv (c1', c2')
adamc@255 2990 in
adamc@255 2991 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 2992 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 2993
adamc@255 2994 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ enD gs4 @ gs))
adamc@255 2995 end
adamc@255 2996
adamc@255 2997 | L.DOpenConstraints (m, ms) =>
adamc@255 2998 let
adamc@255 2999 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3000 in
adamc@255 3001 ([], (env, denv, gs))
adamc@255 3002 end
adamc@255 3003
adamc@255 3004 | L.DExport str =>
adamc@255 3005 let
adamc@255 3006 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3007
adamc@255 3008 val sgn =
adamc@255 3009 case #1 (hnormSgn env sgn) of
adamc@255 3010 L'.SgnConst sgis =>
adamc@255 3011 let
adamc@255 3012 fun doOne (all as (sgi, _), env) =
adamc@255 3013 (case sgi of
adamc@255 3014 L'.SgiVal (x, n, t) =>
adamc@325 3015 let
adamc@325 3016 fun doPage (makeRes, ran) =
adamc@325 3017 case hnormCon (env, denv) ran of
adamc@325 3018 ((L'.CApp (tf, arg), _), []) =>
adamc@325 3019 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg) of
adamc@325 3020 (((L'.CModProj (basis, [], "transaction"), _), []),
adamc@325 3021 ((L'.CApp (tf, arg3), _), [])) =>
adamc@325 3022 (case (basis = !basis_r,
adamc@325 3023 hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
adamc@325 3024 (true,
adamc@325 3025 ((L'.CApp (tf, arg2), _), []),
adamc@325 3026 (((L'.CRecord (_, []), _), []))) =>
adamc@325 3027 (case (hnormCon (env, denv) tf) of
adamc@325 3028 ((L'.CApp (tf, arg1), _), []) =>
adamc@325 3029 (case (hnormCon (env, denv) tf,
adamc@325 3030 hnormCon (env, denv) arg1,
adamc@325 3031 hnormCon (env, denv) arg2) of
adamc@325 3032 ((tf, []), (arg1, []),
adamc@325 3033 ((L'.CRecord (_, []), _), [])) =>
adamc@325 3034 let
adamc@325 3035 val t = (L'.CApp (tf, arg1), loc)
adamc@325 3036 val t = (L'.CApp (t, arg2), loc)
adamc@325 3037 val t = (L'.CApp (t, arg3), loc)
adamc@325 3038 val t = (L'.CApp (
adamc@325 3039 (L'.CModProj
adamc@325 3040 (basis, [], "transaction"), loc),
adamc@325 3041 t), loc)
adamc@325 3042 in
adamc@325 3043 (L'.SgiVal (x, n, makeRes t), loc)
adamc@325 3044 end
adamc@325 3045 | _ => all)
adamc@325 3046 | _ => all)
adamc@325 3047 | _ => all)
adamc@325 3048 | _ => all)
adamc@325 3049 | _ => all
adamc@325 3050 in
adamc@325 3051 case hnormCon (env, denv) t of
adamc@325 3052 ((L'.TFun (dom, ran), _), []) =>
adamc@325 3053 (case hnormCon (env, denv) dom of
adamc@325 3054 ((L'.TRecord domR, _), []) =>
adamc@325 3055 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3056 loc),
adamc@325 3057 t), loc), ran)
adamc@325 3058 | _ => all)
adamc@325 3059 | _ => doPage (fn t => t, t)
adamc@325 3060 end
adamc@255 3061 | _ => all,
adamc@255 3062 E.sgiBinds env all)
adamc@255 3063 in
adamc@255 3064 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3065 end
adamc@255 3066 | _ => sgn
adamc@255 3067 in
adamc@255 3068 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3069 end
adamc@255 3070
adamc@255 3071 | L.DTable (x, c) =>
adamc@255 3072 let
adamc@255 3073 val (c', k, gs') = elabCon (env, denv) c
adamc@255 3074 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@255 3075 in
adamc@255 3076 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@255 3077 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3078 end
adamc@338 3079 | L.DSequence x =>
adamc@338 3080 let
adamc@338 3081 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3082 in
adamc@338 3083 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3084 end
adamc@255 3085
adamc@255 3086 | L.DClass (x, c) =>
adamc@255 3087 let
adamc@255 3088 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@280 3089 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3090 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@255 3091 val env = E.pushClass env n
adamc@255 3092 in
adamc@255 3093 checkKind env c' ck k;
adamc@280 3094 ([(L'.DClass (x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3095 end
adamc@271 3096
adamc@280 3097 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3098
adamc@280 3099 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3100 in
adamc@280 3101 (*prefaces "elabDecl" [("e", SourcePrint.p_decl dAll),
adamc@280 3102 ("|tcs|", PD.string (Int.toString (length tcs)))];*)
adamc@280 3103
adamc@255 3104 r
adamc@255 3105 end
adamc@211 3106
adamc@83 3107 and elabStr (env, denv) (str, loc) =
adamc@31 3108 case str of
adamc@31 3109 L.StrConst ds =>
adamc@31 3110 let
adamc@88 3111 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3112 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3113
adamc@63 3114 val (sgis, _, _, _, _) =
adamc@64 3115 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3116 case sgi of
adamc@64 3117 L'.SgiConAbs (x, n, k) =>
adamc@64 3118 let
adamc@64 3119 val (cons, x) =
adamc@64 3120 if SS.member (cons, x) then
adamc@64 3121 (cons, "?" ^ x)
adamc@64 3122 else
adamc@64 3123 (SS.add (cons, x), x)
adamc@64 3124 in
adamc@64 3125 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3126 end
adamc@64 3127 | L'.SgiCon (x, n, k, c) =>
adamc@64 3128 let
adamc@64 3129 val (cons, x) =
adamc@64 3130 if SS.member (cons, x) then
adamc@64 3131 (cons, "?" ^ x)
adamc@64 3132 else
adamc@64 3133 (SS.add (cons, x), x)
adamc@64 3134 in
adamc@64 3135 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3136 end
adamc@191 3137 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 3138 let
adamc@156 3139 val (cons, x) =
adamc@156 3140 if SS.member (cons, x) then
adamc@156 3141 (cons, "?" ^ x)
adamc@156 3142 else
adamc@156 3143 (SS.add (cons, x), x)
adamc@156 3144
adamc@156 3145 val (xncs, vals) =
adamc@156 3146 ListUtil.foldlMap
adamc@156 3147 (fn ((x, n, t), vals) =>
adamc@156 3148 if SS.member (vals, x) then
adamc@156 3149 (("?" ^ x, n, t), vals)
adamc@156 3150 else
adamc@156 3151 ((x, n, t), SS.add (vals, x)))
adamc@156 3152 vals xncs
adamc@156 3153 in
adamc@191 3154 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3155 end
adamc@191 3156 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3157 let
adamc@156 3158 val (cons, x) =
adamc@156 3159 if SS.member (cons, x) then
adamc@156 3160 (cons, "?" ^ x)
adamc@156 3161 else
adamc@156 3162 (SS.add (cons, x), x)
adamc@156 3163 in
adamc@191 3164 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3165 end
adamc@64 3166 | L'.SgiVal (x, n, c) =>
adamc@64 3167 let
adamc@64 3168 val (vals, x) =
adamc@64 3169 if SS.member (vals, x) then
adamc@64 3170 (vals, "?" ^ x)
adamc@64 3171 else
adamc@64 3172 (SS.add (vals, x), x)
adamc@64 3173 in
adamc@64 3174 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3175 end
adamc@64 3176 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3177 let
adamc@64 3178 val (sgns, x) =
adamc@64 3179 if SS.member (sgns, x) then
adamc@64 3180 (sgns, "?" ^ x)
adamc@64 3181 else
adamc@64 3182 (SS.add (sgns, x), x)
adamc@64 3183 in
adamc@64 3184 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3185 end
adamc@64 3186
adamc@64 3187 | L'.SgiStr (x, n, sgn) =>
adamc@64 3188 let
adamc@64 3189 val (strs, x) =
adamc@64 3190 if SS.member (strs, x) then
adamc@64 3191 (strs, "?" ^ x)
adamc@64 3192 else
adamc@64 3193 (SS.add (strs, x), x)
adamc@64 3194 in
adamc@64 3195 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3196 end
adamc@203 3197 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@205 3198 | L'.SgiTable (tn, x, n, c) =>
adamc@203 3199 let
adamc@203 3200 val (vals, x) =
adamc@203 3201 if SS.member (vals, x) then
adamc@203 3202 (vals, "?" ^ x)
adamc@203 3203 else
adamc@203 3204 (SS.add (vals, x), x)
adamc@203 3205 in
adamc@205 3206 ((L'.SgiTable (tn, x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3207 end
adamc@338 3208 | L'.SgiSequence (tn, x, n) =>
adamc@338 3209 let
adamc@338 3210 val (vals, x) =
adamc@338 3211 if SS.member (vals, x) then
adamc@338 3212 (vals, "?" ^ x)
adamc@338 3213 else
adamc@338 3214 (SS.add (vals, x), x)
adamc@338 3215 in
adamc@338 3216 ((L'.SgiSequence (tn, x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@338 3217 end
adamc@211 3218 | L'.SgiClassAbs (x, n) =>
adamc@211 3219 let
adamc@211 3220 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3221
adamc@211 3222 val (cons, x) =
adamc@211 3223 if SS.member (cons, x) then
adamc@211 3224 (cons, "?" ^ x)
adamc@211 3225 else
adamc@211 3226 (SS.add (cons, x), x)
adamc@211 3227 in
adamc@211 3228 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3229 end
adamc@211 3230 | L'.SgiClass (x, n, c) =>
adamc@211 3231 let
adamc@211 3232 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3233
adamc@211 3234 val (cons, x) =
adamc@211 3235 if SS.member (cons, x) then
adamc@211 3236 (cons, "?" ^ x)
adamc@211 3237 else
adamc@211 3238 (SS.add (cons, x), x)
adamc@211 3239 in
adamc@211 3240 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3241 end)
adamc@64 3242
adamc@63 3243 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3244 in
adamc@83 3245 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3246 end
adamc@31 3247 | L.StrVar x =>
adamc@31 3248 (case E.lookupStr env x of
adamc@31 3249 NONE =>
adamc@31 3250 (strError env (UnboundStr (loc, x));
adamc@83 3251 (strerror, sgnerror, []))
adamc@83 3252 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3253 | L.StrProj (str, x) =>
adamc@34 3254 let
adamc@83 3255 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3256 in
adamc@34 3257 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3258 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3259 (strerror, sgnerror, []))
adamc@83 3260 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3261 end
adamc@41 3262 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3263 let
adamc@83 3264 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3265 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3266 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3267
adamc@83 3268 val (formal, gs3) =
adamc@41 3269 case ranO of
adamc@83 3270 NONE => (actual, [])
adamc@41 3271 | SOME ran =>
adamc@41 3272 let
adamc@83 3273 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3274 in
adamc@86 3275 subSgn (env', denv) actual ran';
adamc@83 3276 (ran', gs)
adamc@41 3277 end
adamc@41 3278 in
adamc@41 3279 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3280 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3281 enD gs1 @ gs2 @ enD gs3)
adamc@41 3282 end
adamc@44 3283 | L.StrApp (str1, str2) =>
adamc@44 3284 let
adamc@83 3285 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3286 val str2 =
adamc@325 3287 case sgn1 of
adamc@325 3288 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3289 wildifyStr env (str2, dom)
adamc@325 3290 | _ => str2
adamc@83 3291 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3292 in
adamc@44 3293 case #1 (hnormSgn env sgn1) of
adamc@83 3294 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3295 | L'.SgnFun (m, n, dom, ran) =>
adamc@86 3296 (subSgn (env, denv) sgn2 dom;
adamc@44 3297 case #1 (hnormSgn env ran) of
adamc@83 3298 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3299 | L'.SgnConst sgis =>
adamc@44 3300 ((L'.StrApp (str1', str2'), loc),
adamc@83 3301 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3302 gs1 @ gs2)
adamc@44 3303 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3304 | _ => (strError env (NotFunctor sgn1);
adamc@83 3305 (strerror, sgnerror, []))
adamc@44 3306 end
adamc@31 3307
adamc@325 3308 fun elabFile basis topStr topSgn env file =
adamc@56 3309 let
adamc@83 3310 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3311 val () = case gs of
adamc@83 3312 [] => ()
adamc@207 3313 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3314 prefaces "Unresolved"
adamc@207 3315 [("c1", p_con env c1),
adamc@207 3316 ("c2", p_con env c2)]) gs;
adamc@207 3317 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3318
adamc@56 3319 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3320 val () = basis_r := basis_n
adamc@56 3321
adamc@88 3322 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
adamc@56 3323
adamc@56 3324 fun discoverC r x =
adamc@56 3325 case E.lookupC env' x of
adamc@56 3326 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3327 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3328 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3329
adamc@56 3330 val () = discoverC int "int"
adamc@56 3331 val () = discoverC float "float"
adamc@56 3332 val () = discoverC string "string"
adamc@203 3333 val () = discoverC table "sql_table"
adamc@56 3334
adamc@325 3335 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3336 val () = case gs of
adamc@325 3337 [] => ()
adamc@325 3338 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3339 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3340 val () = case gs of
adamc@325 3341 [] => ()
adamc@329 3342 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3343 (case D.prove env denv (c1, c2, loc) of
adamc@329 3344 [] => ()
adamc@329 3345 | _ =>
adamc@329 3346 (prefaces "Unresolved constraint in top.ur"
adamc@329 3347 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3348 ("c1", p_con env c1),
adamc@329 3349 ("c2", p_con env c2)];
adamc@329 3350 raise Fail "Unresolve constraint in top.ur"))
adamc@329 3351 | TypeClass _ => raise Fail "Unresolved type class constraint in top.ur") gs
adamc@325 3352 val () = subSgn (env', D.empty) topSgn' topSgn
adamc@325 3353
adamc@325 3354 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@325 3355
adamc@325 3356 val (ds', (env', _)) = dopen (env', D.empty) {str = top_n, strs = [], sgn = topSgn}
adamc@325 3357
adamc@83 3358 fun elabDecl' (d, (env, gs)) =
adamc@76 3359 let
adamc@76 3360 val () = resetKunif ()
adamc@76 3361 val () = resetCunif ()
adamc@88 3362 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3363 in
adamc@76 3364 if ErrorMsg.anyErrors () then
adamc@76 3365 ()
adamc@76 3366 else (
adamc@76 3367 if List.exists kunifsInDecl ds then
adamc@91 3368 declError env (KunifsRemain ds)
adamc@76 3369 else
adamc@76 3370 ();
adamc@76 3371
adamc@76 3372 case ListUtil.search cunifsInDecl ds of
adamc@76 3373 NONE => ()
adamc@76 3374 | SOME loc =>
adamc@91 3375 declError env (CunifsRemain ds)
adamc@76 3376 );
adamc@76 3377
adamc@83 3378 (ds, (env, gs))
adamc@76 3379 end
adamc@76 3380
adamc@83 3381 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3382 in
adamc@84 3383 if ErrorMsg.anyErrors () then
adamc@84 3384 ()
adamc@84 3385 else
adamc@228 3386 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@228 3387 (case D.prove env denv (c1, c2, loc) of
adamc@228 3388 [] => ()
adamc@228 3389 | _ =>
adamc@228 3390 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@228 3391 eprefaces' [("Con 1", p_con env c1),
adamc@228 3392 ("Con 2", p_con env c2),
adamc@228 3393 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@228 3394 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))]))
adamc@228 3395 | TypeClass (env, c, r, loc) =>
adamc@228 3396 case E.resolveClass env c of
adamc@228 3397 SOME e => r := SOME e
adamc@228 3398 | NONE => expError env (Unresolvable (loc, c))) gs;
adamc@83 3399
adamc@325 3400 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 3401 :: ds
adamc@325 3402 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 3403 :: ds' @ file
adamc@56 3404 end
adamc@2 3405
adamc@2 3406 end