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annotate src/elaborate.sml @ 646:fb2a0e76dcef

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ListEdit demo, minus prose
author Adam Chlipala <adamc@hcoop.net>
date Tue, 10 Mar 2009 12:44:40 -0400
parents 6302b10dbe0e
children ae374df5ccbd
rev   line source
adamc@412 1 (* Copyright (c) 2008, Adam Chlipala
adamc@445 2 * All rights reserved.
adamc@445 3 *
adamc@445 4 * Redistribution and use in source and binary forms, with or without
adamc@445 5 * modification, are permitted provided that the following conditions are met:
adamc@445 6 *
adamc@445 7 * - Redistributions of source code must retain the above copyright notice,
adamc@445 8 * this list of conditions and the following disclaimer.
adamc@445 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@445 10 * this list of conditions and the following disclaimer in the documentation
adamc@445 11 * and/or other materials provided with the distribution.
adamc@445 12 * - The names of contributors may not be used to endorse or promote products
adamc@445 13 * derived from this software without specific prior written permission.
adamc@445 14 *
adamc@445 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@445 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@445 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@445 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@445 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@445 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@445 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@445 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@445 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@445 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@445 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@445 26 *)
adamc@403 27
adamc@403 28 structure Elaborate :> ELABORATE = struct
adamc@403 29
adamc@403 30 structure P = Prim
adamc@403 31 structure L = Source
adamc@403 32 structure L' = Elab
adamc@403 33 structure E = ElabEnv
adamc@403 34 structure U = ElabUtil
adamc@403 35 structure D = Disjoint
adamc@403 36
adamc@403 37 open Print
adamc@403 38 open ElabPrint
adamc@403 39 open ElabErr
adamc@403 40
adamc@403 41 structure IM = IntBinaryMap
adamc@403 42
adamc@403 43 structure SK = struct
adamc@403 44 type ord_key = string
adamc@403 45 val compare = String.compare
adamc@403 46 end
adamc@403 47
adamc@403 48 structure SS = BinarySetFn(SK)
adamc@403 49 structure SM = BinaryMapFn(SK)
adamc@403 50
adamc@403 51 val basis_r = ref 0
adamc@633 52 val top_r = ref 0
adamc@403 53
adamc@403 54 fun elabExplicitness e =
adamc@403 55 case e of
adamc@403 56 L.Explicit => L'.Explicit
adamc@403 57 | L.Implicit => L'.Implicit
adamc@403 58
adamc@403 59 fun occursKind r =
adamc@403 60 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 61 | _ => false)
adamc@403 62
adamc@403 63 exception KUnify' of kunify_error
adamc@403 64
adamc@623 65 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 66 let
adamc@403 67 fun err f = raise KUnify' (f (k1All, k2All))
adamc@403 68 in
adamc@403 69 case (k1, k2) of
adamc@403 70 (L'.KType, L'.KType) => ()
adamc@403 71 | (L'.KUnit, L'.KUnit) => ()
adamc@403 72
adamc@403 73 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623 74 (unifyKinds' env d1 d2;
adamc@623 75 unifyKinds' env r1 r2)
adamc@403 76 | (L'.KName, L'.KName) => ()
adamc@623 77 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403 78 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623 79 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403 80 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 81
adamc@623 82 | (L'.KRel n1, L'.KRel n2) =>
adamc@623 83 if n1 = n2 then
adamc@623 84 ()
adamc@623 85 else
adamc@623 86 err KIncompatible
adamc@623 87 | (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623 88 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623 89
adamc@403 90 | (L'.KError, _) => ()
adamc@403 91 | (_, L'.KError) => ()
adamc@403 92
adamc@623 93 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' env k1All k2All
adamc@623 94 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' env k1All k2All
adamc@403 95
adamc@403 96 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@403 97 if r1 = r2 then
adamc@403 98 ()
adamc@403 99 else
adamc@403 100 r1 := SOME k2All
adamc@403 101
adamc@403 102 | (L'.KUnif (_, _, r), _) =>
adamc@403 103 if occursKind r k2All then
adamc@403 104 err KOccursCheckFailed
adamc@403 105 else
adamc@403 106 r := SOME k2All
adamc@403 107 | (_, L'.KUnif (_, _, r)) =>
adamc@403 108 if occursKind r k1All then
adamc@403 109 err KOccursCheckFailed
adamc@403 110 else
adamc@403 111 r := SOME k1All
adamc@403 112
adamc@403 113 | _ => err KIncompatible
adamc@403 114 end
adamc@403 115
adamc@403 116 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@403 117
adamc@623 118 fun unifyKinds env k1 k2 =
adamc@623 119 unifyKinds' env k1 k2
adamc@403 120 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@403 121
adamc@403 122 fun checkKind env c k1 k2 =
adamc@623 123 unifyKinds env k1 k2
adamc@403 124 handle KUnify (k1, k2, err) =>
adamc@403 125 conError env (WrongKind (c, k1, k2, err))
adamc@403 126
adamc@403 127 val dummy = ErrorMsg.dummySpan
adamc@403 128
adamc@403 129 val ktype = (L'.KType, dummy)
adamc@403 130 val kname = (L'.KName, dummy)
adamc@403 131 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 132
adamc@403 133 val cerror = (L'.CError, dummy)
adamc@403 134 val kerror = (L'.KError, dummy)
adamc@403 135 val eerror = (L'.EError, dummy)
adamc@403 136 val sgnerror = (L'.SgnError, dummy)
adamc@403 137 val strerror = (L'.StrError, dummy)
adamc@403 138
adamc@403 139 val int = ref cerror
adamc@403 140 val float = ref cerror
adamc@403 141 val string = ref cerror
adamc@403 142 val table = ref cerror
adamc@403 143
adamc@403 144 local
adamc@403 145 val count = ref 0
adamc@403 146 in
adamc@403 147
adamc@403 148 fun resetKunif () = count := 0
adamc@403 149
adamc@403 150 fun kunif loc =
adamc@403 151 let
adamc@403 152 val n = !count
adamc@403 153 val s = if n <= 26 then
adamc@403 154 str (chr (ord #"A" + n))
adamc@403 155 else
adamc@403 156 "U" ^ Int.toString (n - 26)
adamc@403 157 in
adamc@403 158 count := n + 1;
adamc@403 159 (L'.KUnif (loc, s, ref NONE), dummy)
adamc@403 160 end
adamc@403 161
adamc@403 162 end
adamc@403 163
adamc@403 164 local
adamc@403 165 val count = ref 0
adamc@403 166 in
adamc@403 167
adamc@403 168 fun resetCunif () = count := 0
adamc@403 169
adamc@403 170 fun cunif (loc, k) =
adamc@403 171 let
adamc@403 172 val n = !count
adamc@403 173 val s = if n <= 26 then
adamc@403 174 str (chr (ord #"A" + n))
adamc@403 175 else
adamc@403 176 "U" ^ Int.toString (n - 26)
adamc@403 177 in
adamc@403 178 count := n + 1;
adamc@403 179 (L'.CUnif (loc, k, s, ref NONE), dummy)
adamc@403 180 end
adamc@403 181
adamc@403 182 end
adamc@403 183
adamc@623 184 fun elabKind env (k, loc) =
adamc@403 185 case k of
adamc@403 186 L.KType => (L'.KType, loc)
adamc@623 187 | L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403 188 | L.KName => (L'.KName, loc)
adamc@623 189 | L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403 190 | L.KUnit => (L'.KUnit, loc)
adamc@623 191 | L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adamc@403 192 | L.KWild => kunif loc
adamc@403 193
adamc@623 194 | L.KVar s => (case E.lookupK env s of
adamc@623 195 NONE =>
adamc@623 196 (kindError env (UnboundKind (loc, s));
adamc@623 197 kerror)
adamc@623 198 | SOME n => (L'.KRel n, loc))
adamc@623 199 | L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623 200
adamc@621 201 fun mapKind (dom, ran, loc)=
adamc@621 202 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621 203 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621 204 (L'.KRecord ran, loc)), loc)), loc)
adamc@403 205
adamc@403 206 fun hnormKind (kAll as (k, _)) =
adamc@403 207 case k of
adamc@403 208 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@403 209 | _ => kAll
adamc@403 210
adamc@623 211 open ElabOps
adamc@623 212
adamc@623 213 fun elabConHead (c as (_, loc)) k =
adamc@623 214 let
adamc@623 215 fun unravel (k, c) =
adamc@623 216 case hnormKind k of
adamc@623 217 (L'.KFun (x, k'), _) =>
adamc@623 218 let
adamc@623 219 val u = kunif loc
adamc@623 220
adamc@623 221 val k'' = subKindInKind (0, u) k'
adamc@623 222 in
adamc@623 223 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623 224 end
adamc@623 225 | _ => (c, k)
adamc@623 226 in
adamc@623 227 unravel (k, c)
adamc@623 228 end
adamc@623 229
adamc@403 230 fun elabCon (env, denv) (c, loc) =
adamc@403 231 case c of
adamc@403 232 L.CAnnot (c, k) =>
adamc@403 233 let
adamc@623 234 val k' = elabKind env k
adamc@403 235 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 236 in
adamc@403 237 checkKind env c' ck k';
adamc@403 238 (c', k', gs)
adamc@403 239 end
adamc@403 240
adamc@403 241 | L.TFun (t1, t2) =>
adamc@403 242 let
adamc@403 243 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 244 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 245 in
adamc@403 246 checkKind env t1' k1 ktype;
adamc@403 247 checkKind env t2' k2 ktype;
adamc@403 248 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 249 end
adamc@403 250 | L.TCFun (e, x, k, t) =>
adamc@403 251 let
adamc@403 252 val e' = elabExplicitness e
adamc@623 253 val k' = elabKind env k
adamc@403 254 val env' = E.pushCRel env x k'
adamc@403 255 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 256 in
adamc@403 257 checkKind env t' tk ktype;
adamc@403 258 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 259 end
adamc@623 260 | L.TKFun (x, t) =>
adamc@623 261 let
adamc@623 262 val env' = E.pushKRel env x
adamc@623 263 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 264 in
adamc@623 265 checkKind env t' tk ktype;
adamc@623 266 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623 267 end
adamc@628 268 | L.TDisjoint (c1, c2, c) =>
adamc@403 269 let
adamc@403 270 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 271 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 272
adamc@403 273 val ku1 = kunif loc
adamc@403 274 val ku2 = kunif loc
adamc@403 275
adamc@628 276 val denv' = D.assert env denv (c1', c2')
adamc@403 277 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 278 in
adamc@403 279 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 280 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@403 281
adamc@628 282 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403 283 end
adamc@403 284 | L.TRecord c =>
adamc@403 285 let
adamc@403 286 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 287 val k = (L'.KRecord ktype, loc)
adamc@403 288 in
adamc@403 289 checkKind env c' ck k;
adamc@403 290 ((L'.TRecord c', loc), ktype, gs)
adamc@403 291 end
adamc@403 292
adamc@403 293 | L.CVar ([], s) =>
adamc@403 294 (case E.lookupC env s of
adamc@403 295 E.NotBound =>
adamc@403 296 (conError env (UnboundCon (loc, s));
adamc@403 297 (cerror, kerror, []))
adamc@403 298 | E.Rel (n, k) =>
adamc@623 299 let
adamc@623 300 val (c, k) = elabConHead (L'.CRel n, loc) k
adamc@623 301 in
adamc@623 302 (c, k, [])
adamc@623 303 end
adamc@403 304 | E.Named (n, k) =>
adamc@623 305 let
adamc@623 306 val (c, k) = elabConHead (L'.CNamed n, loc) k
adamc@623 307 in
adamc@623 308 (c, k, [])
adamc@623 309 end)
adamc@403 310 | L.CVar (m1 :: ms, s) =>
adamc@403 311 (case E.lookupStr env m1 of
adamc@403 312 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 313 (cerror, kerror, []))
adamc@403 314 | SOME (n, sgn) =>
adamc@403 315 let
adamc@403 316 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 317 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 318 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 319 (strerror, sgnerror))
adamc@403 320 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 321 ((L'.StrVar n, loc), sgn) ms
adamc@403 322
adamc@403 323 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@403 324 NONE => (conError env (UnboundCon (loc, s));
adamc@403 325 kerror)
adamc@403 326 | SOME (k, _) => k
adamc@403 327 in
adamc@403 328 ((L'.CModProj (n, ms, s), loc), k, [])
adamc@403 329 end)
adamc@403 330
adamc@403 331 | L.CApp (c1, c2) =>
adamc@403 332 let
adamc@403 333 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 334 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 335 val dom = kunif loc
adamc@403 336 val ran = kunif loc
adamc@403 337 in
adamc@403 338 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 339 checkKind env c2' k2 dom;
adamc@403 340 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 341 end
adamc@403 342 | L.CAbs (x, ko, t) =>
adamc@403 343 let
adamc@403 344 val k' = case ko of
adamc@403 345 NONE => kunif loc
adamc@623 346 | SOME k => elabKind env k
adamc@403 347 val env' = E.pushCRel env x k'
adamc@403 348 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 349 in
adamc@403 350 ((L'.CAbs (x, k', t'), loc),
adamc@403 351 (L'.KArrow (k', tk), loc),
adamc@403 352 gs)
adamc@403 353 end
adamc@623 354 | L.CKAbs (x, t) =>
adamc@623 355 let
adamc@623 356 val env' = E.pushKRel env x
adamc@623 357 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 358 in
adamc@623 359 ((L'.CKAbs (x, t'), loc),
adamc@623 360 (L'.KFun (x, tk), loc),
adamc@623 361 gs)
adamc@623 362 end
adamc@403 363
adamc@403 364 | L.CName s =>
adamc@403 365 ((L'.CName s, loc), kname, [])
adamc@403 366
adamc@403 367 | L.CRecord xcs =>
adamc@403 368 let
adamc@403 369 val k = kunif loc
adamc@403 370
adamc@403 371 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 372 let
adamc@403 373 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 374 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 375 in
adamc@403 376 checkKind env x' xk kname;
adamc@403 377 checkKind env c' ck k;
adamc@403 378 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 379 end) [] xcs
adamc@403 380
adamc@403 381 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 382 (* Add duplicate field checking later. *)
adamc@403 383
adamc@403 384 fun prove (xcs, ds) =
adamc@403 385 case xcs of
adamc@403 386 [] => ds
adamc@403 387 | xc :: rest =>
adamc@403 388 let
adamc@403 389 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 390 val ds = foldl (fn (xc', ds) =>
adamc@403 391 let
adamc@403 392 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 393 in
adamc@403 394 D.prove env denv (r1, r2, loc) @ ds
adamc@403 395 end)
adamc@403 396 ds rest
adamc@403 397 in
adamc@403 398 prove (rest, ds)
adamc@403 399 end
adamc@403 400 in
adamc@403 401 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 402 end
adamc@403 403 | L.CConcat (c1, c2) =>
adamc@403 404 let
adamc@403 405 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 406 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 407 val ku = kunif loc
adamc@403 408 val k = (L'.KRecord ku, loc)
adamc@403 409 in
adamc@403 410 checkKind env c1' k1 k;
adamc@403 411 checkKind env c2' k2 k;
adamc@403 412 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 413 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 414 end
adamc@621 415 | L.CMap =>
adamc@403 416 let
adamc@403 417 val dom = kunif loc
adamc@403 418 val ran = kunif loc
adamc@403 419 in
adamc@621 420 ((L'.CMap (dom, ran), loc),
adamc@621 421 mapKind (dom, ran, loc),
adamc@403 422 [])
adamc@403 423 end
adamc@403 424
adamc@403 425 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 426
adamc@403 427 | L.CTuple cs =>
adamc@403 428 let
adamc@403 429 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 430 let
adamc@403 431 val (c', k, gs') = elabCon (env, denv) c
adamc@403 432 in
adamc@403 433 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 434 end) ([], [], []) cs
adamc@403 435 in
adamc@403 436 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 437 end
adamc@403 438 | L.CProj (c, n) =>
adamc@403 439 let
adamc@403 440 val (c', k, gs) = elabCon (env, denv) c
adamc@403 441 in
adamc@403 442 case hnormKind k of
adamc@403 443 (L'.KTuple ks, _) =>
adamc@403 444 if n <= 0 orelse n > length ks then
adamc@403 445 (conError env (ProjBounds (c', n));
adamc@83 446 (cerror, kerror, []))
adamc@403 447 else
adamc@403 448 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@403 449 | k => (conError env (ProjMismatch (c', k));
adamc@403 450 (cerror, kerror, []))
adamc@403 451 end
adamc@403 452
adamc@403 453 | L.CWild k =>
adamc@403 454 let
adamc@623 455 val k' = elabKind env k
adamc@403 456 in
adamc@403 457 (cunif (loc, k'), k', [])
adamc@403 458 end
adamc@403 459
adamc@403 460 fun kunifsRemain k =
adamc@403 461 case k of
adamc@403 462 L'.KUnif (_, _, ref NONE) => true
adamc@403 463 | _ => false
adamc@403 464 fun cunifsRemain c =
adamc@403 465 case c of
adamc@403 466 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@403 467 | _ => NONE
adamc@403 468
adamc@403 469 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 470 con = fn _ => false,
adamc@403 471 exp = fn _ => false,
adamc@403 472 sgn_item = fn _ => false,
adamc@403 473 sgn = fn _ => false,
adamc@403 474 str = fn _ => false,
adamc@403 475 decl = fn _ => false}
adamc@403 476
adamc@403 477 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@403 478 con = cunifsRemain,
adamc@403 479 exp = fn _ => NONE,
adamc@403 480 sgn_item = fn _ => NONE,
adamc@403 481 sgn = fn _ => NONE,
adamc@403 482 str = fn _ => NONE,
adamc@403 483 decl = fn _ => NONE}
adamc@403 484
adamc@403 485 fun occursCon r =
adamc@403 486 U.Con.exists {kind = fn _ => false,
adamc@403 487 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@403 488 | _ => false}
adamc@403 489
adamc@403 490 exception CUnify' of cunify_error
adamc@403 491
adamc@403 492 exception SynUnif = E.SynUnif
adamc@403 493
adamc@403 494 type record_summary = {
adamc@403 495 fields : (L'.con * L'.con) list,
adamc@403 496 unifs : (L'.con * L'.con option ref) list,
adamc@403 497 others : L'.con list
adamc@403 498 }
adamc@403 499
adamc@403 500 fun summaryToCon {fields, unifs, others} =
adamc@403 501 let
adamc@403 502 val c = (L'.CRecord (ktype, []), dummy)
adamc@403 503 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@403 504 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@403 505 in
adamc@403 506 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@403 507 end
adamc@403 508
adamc@403 509 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 510
adamc@403 511 exception CUnify of L'.con * L'.con * cunify_error
adamc@403 512
adamc@403 513 fun kindof env (c, loc) =
adamc@403 514 case c of
adamc@403 515 L'.TFun _ => ktype
adamc@403 516 | L'.TCFun _ => ktype
adamc@403 517 | L'.TRecord _ => ktype
adamc@628 518 | L'.TDisjoint _ => ktype
adamc@403 519
adamc@403 520 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 521 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 522 | L'.CModProj (n, ms, x) =>
adamc@403 523 let
adamc@403 524 val (_, sgn) = E.lookupStrNamed env n
adamc@403 525 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 526 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 527 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 528 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 529 ((L'.StrVar n, loc), sgn) ms
adamc@403 530 in
adamc@403 531 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 532 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 533 | SOME (k, _) => k
adamc@403 534 end
adamc@403 535
adamc@403 536 | L'.CApp (c, _) =>
adamc@403 537 (case hnormKind (kindof env c) of
adamc@403 538 (L'.KArrow (_, k), _) => k
adamc@403 539 | (L'.KError, _) => kerror
adamc@413 540 | k => raise CUnify' (CKindof (k, c, "arrow")))
adamc@403 541 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628 542
adamc@403 543
adamc@403 544 | L'.CName _ => kname
adamc@403 545
adamc@403 546 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 547 | L'.CConcat (c, _) => kindof env c
adamc@621 548 | L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403 549
adamc@403 550 | L'.CUnit => (L'.KUnit, loc)
adamc@403 551
adamc@403 552 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 553 | L'.CProj (c, n) =>
adamc@403 554 (case hnormKind (kindof env c) of
adamc@403 555 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@413 556 | k => raise CUnify' (CKindof (k, c, "tuple")))
adamc@403 557
adamc@403 558 | L'.CError => kerror
adamc@403 559 | L'.CUnif (_, k, _, _) => k
adamc@403 560
adamc@623 561 | L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623 562 | L'.CKApp (c, k) =>
adamc@623 563 (case hnormKind (kindof env c) of
adamc@623 564 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adamc@623 565 | k => raise CUnify' (CKindof (k, c, "kapp")))
adamc@623 566 | L'.TKFun _ => ktype
adamc@403 567
adamc@621 568 exception GuessFailure
adamc@403 569
adamc@513 570 fun isUnitCon env (c, loc) =
adamc@513 571 case c of
adamc@513 572 L'.TFun _ => false
adamc@513 573 | L'.TCFun _ => false
adamc@513 574 | L'.TRecord _ => false
adamc@628 575 | L'.TDisjoint _ => false
adamc@513 576
adamc@513 577 | L'.CRel xn => #1 (#2 (E.lookupCRel env xn)) = L'.KUnit
adamc@513 578 | L'.CNamed xn => #1 (#2 (E.lookupCNamed env xn)) = L'.KUnit
adamc@518 579 | L'.CModProj (n, ms, x) => false
adamc@518 580 (*let
adamc@513 581 val (_, sgn) = E.lookupStrNamed env n
adamc@513 582 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513 583 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513 584 NONE => raise Fail "kindof: Unknown substructure"
adamc@513 585 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513 586 ((L'.StrVar n, loc), sgn) ms
adamc@513 587 in
adamc@513 588 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513 589 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513 590 | SOME ((k, _), _) => k = L'.KUnit
adamc@518 591 end*)
adamc@518 592
adamc@518 593 | L'.CApp (c, _) => false
adamc@518 594 (*(case hnormKind (kindof env c) of
adamc@513 595 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513 596 | (L'.KError, _) => false
adamc@518 597 | k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513 598 | L'.CAbs _ => false
adamc@513 599
adamc@513 600 | L'.CName _ => false
adamc@513 601
adamc@513 602 | L'.CRecord _ => false
adamc@513 603 | L'.CConcat _ => false
adamc@621 604 | L'.CMap _ => false
adamc@513 605
adamc@513 606 | L'.CUnit => true
adamc@513 607
adamc@513 608 | L'.CTuple _ => false
adamc@518 609 | L'.CProj (c, n) => false
adamc@518 610 (*(case hnormKind (kindof env c) of
adamc@513 611 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518 612 | k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513 613
adamc@513 614 | L'.CError => false
adamc@513 615 | L'.CUnif (_, k, _, _) => #1 k = L'.KUnit
adamc@513 616
adamc@623 617 | L'.CKAbs _ => false
adamc@623 618 | L'.CKApp _ => false
adamc@623 619 | L'.TKFun _ => false
adamc@623 620
adamc@628 621 fun unifyRecordCons env (c1, c2) =
adamc@403 622 let
adamc@403 623 fun rkindof c =
adamc@403 624 case hnormKind (kindof env c) of
adamc@403 625 (L'.KRecord k, _) => k
adamc@403 626 | (L'.KError, _) => kerror
adamc@413 627 | k => raise CUnify' (CKindof (k, c, "record"))
adamc@403 628
adamc@403 629 val k1 = rkindof c1
adamc@403 630 val k2 = rkindof c2
adamc@403 631
adamc@628 632 val r1 = recordSummary env c1
adamc@628 633 val r2 = recordSummary env c2
adamc@403 634 in
adamc@623 635 unifyKinds env k1 k2;
adamc@628 636 unifySummaries env (k1, r1, r2)
adamc@403 637 end
adamc@403 638
adamc@628 639 and recordSummary env c =
adamc@403 640 let
adamc@628 641 val c = hnormCon env c
adamc@628 642
adamc@628 643 val sum =
adamc@403 644 case c of
adamc@628 645 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403 646 | (L'.CConcat (c1, c2), _) =>
adamc@403 647 let
adamc@628 648 val s1 = recordSummary env c1
adamc@628 649 val s2 = recordSummary env c2
adamc@403 650 in
adamc@628 651 {fields = #fields s1 @ #fields s2,
adamc@628 652 unifs = #unifs s1 @ #unifs s2,
adamc@628 653 others = #others s1 @ #others s2}
adamc@403 654 end
adamc@628 655 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary env c
adamc@628 656 | c' as (L'.CUnif (_, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628 657 | c' => {fields = [], unifs = [], others = [c']}
adamc@403 658 in
adamc@628 659 sum
adamc@403 660 end
adamc@403 661
adamc@628 662 and consEq env (c1, c2) =
adamc@628 663 (unifyCons env c1 c2;
adamc@628 664 true)
adamc@403 665 handle CUnify _ => false
adamc@403 666
adamc@403 667 and consNeq env (c1, c2) =
adamc@628 668 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403 669 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@403 670 | _ => false
adamc@403 671
adamc@628 672 and unifySummaries env (k, s1 : record_summary, s2 : record_summary) =
adamc@403 673 let
adamc@403 674 val loc = #2 k
adamc@403 675 (*val () = eprefaces "Summaries" [("#1", p_summary env s1),
adamc@403 676 ("#2", p_summary env s2)]*)
adamc@403 677
adamc@403 678 fun eatMatching p (ls1, ls2) =
adamc@403 679 let
adamc@403 680 fun em (ls1, ls2, passed1) =
adamc@403 681 case ls1 of
adamc@403 682 [] => (rev passed1, ls2)
adamc@403 683 | h1 :: t1 =>
adamc@403 684 let
adamc@403 685 fun search (ls2', passed2) =
adamc@403 686 case ls2' of
adamc@403 687 [] => em (t1, ls2, h1 :: passed1)
adamc@403 688 | h2 :: t2 =>
adamc@403 689 if p (h1, h2) then
adamc@403 690 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 691 else
adamc@403 692 search (t2, h2 :: passed2)
adamc@403 693 in
adamc@403 694 search (ls2, [])
adamc@403 695 end
adamc@403 696 in
adamc@403 697 em (ls1, ls2, [])
adamc@403 698 end
adamc@403 699
adamc@403 700 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 701 not (consNeq env (x1, x2))
adamc@628 702 andalso consEq env (c1, c2)
adamc@628 703 andalso consEq env (x1, x2))
adamc@403 704 (#fields s1, #fields s2)
adamc@403 705 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 706 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 707
adamc@403 708 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 709 fun eatMost unifs =
adamc@646 710 case unifs of
adamc@646 711 (_, r) :: (rest as _ :: _) => (r := SOME (L'.CRecord (k, []), loc);
adamc@646 712 eatMost rest)
adamc@646 713 | _ => unifs
adamc@646 714 val unifs1 = eatMost unifs1
adamc@646 715 val unifs2 = eatMost unifs2
adamc@646 716
adamc@628 717 val (others1, others2) = eatMatching (consEq env) (#others s1, #others s2)
adamc@403 718 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 719 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 720
adamc@403 721 fun unifFields (fs, others, unifs) =
adamc@403 722 case (fs, others, unifs) of
adamc@403 723 ([], [], _) => ([], [], unifs)
adamc@403 724 | (_, _, []) => (fs, others, [])
adamc@403 725 | (_, _, (_, r) :: rest) =>
adamc@403 726 let
adamc@403 727 val r' = ref NONE
adamc@403 728 val kr = (L'.KRecord k, dummy)
adamc@403 729 val cr' = (L'.CUnif (dummy, kr, "recd", r'), dummy)
adamc@403 730
adamc@403 731 val prefix = case (fs, others) of
adamc@403 732 ([], other :: others) =>
adamc@403 733 List.foldl (fn (other, c) =>
adamc@403 734 (L'.CConcat (c, other), dummy))
adamc@403 735 other others
adamc@403 736 | (fs, []) =>
adamc@403 737 (L'.CRecord (k, fs), dummy)
adamc@403 738 | (fs, others) =>
adamc@403 739 List.foldl (fn (other, c) =>
adamc@403 740 (L'.CConcat (c, other), dummy))
adamc@403 741 (L'.CRecord (k, fs), dummy) others
adamc@403 742 in
adamc@403 743 r := SOME (L'.CConcat (prefix, cr'), dummy);
adamc@403 744 ([], [], (cr', r') :: rest)
adamc@403 745 end
adamc@403 746
adamc@403 747 val (fs1, others1, unifs2) = unifFields (fs1, others1, unifs2)
adamc@403 748 val (fs2, others2, unifs1) = unifFields (fs2, others2, unifs1)
adamc@403 749
adamc@403 750 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 751 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 752
adamc@403 753 fun isGuessable (other, fs) =
adamc@628 754 (guessMap env (other, (L'.CRecord (k, fs), loc), GuessFailure);
adamc@628 755 true)
adamc@621 756 handle GuessFailure => false
adamc@403 757
adamc@403 758 val (fs1, fs2, others1, others2) =
adamc@403 759 case (fs1, fs2, others1, others2) of
adamc@403 760 ([], _, [other1], []) =>
adamc@403 761 if isGuessable (other1, fs2) then
adamc@403 762 ([], [], [], [])
adamc@403 763 else
adamc@403 764 (fs1, fs2, others1, others2)
adamc@403 765 | (_, [], [], [other2]) =>
adamc@403 766 if isGuessable (other2, fs1) then
adamc@403 767 ([], [], [], [])
adamc@403 768 else
adamc@403 769 (fs1, fs2, others1, others2)
adamc@403 770 | _ => (fs1, fs2, others1, others2)
adamc@403 771
adamc@403 772 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 773 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 774
adamc@403 775 val clear = case (fs1, others1, fs2, others2) of
adamc@403 776 ([], [], [], []) => true
adamc@403 777 | _ => false
adamc@403 778 val empty = (L'.CRecord (k, []), dummy)
adamc@403 779
adamc@403 780 fun unsummarize {fields, unifs, others} =
adamc@403 781 let
adamc@403 782 val c = (L'.CRecord (k, fields), loc)
adamc@403 783
adamc@403 784 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@403 785 c unifs
adamc@403 786 in
adamc@403 787 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@403 788 c others
adamc@403 789 end
adamc@403 790
adamc@403 791 fun pairOffUnifs (unifs1, unifs2) =
adamc@403 792 case (unifs1, unifs2) of
adamc@403 793 ([], _) =>
adamc@403 794 if clear then
adamc@403 795 List.app (fn (_, r) => r := SOME empty) unifs2
adamc@403 796 else
adamc@403 797 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@403 798 | (_, []) =>
adamc@403 799 if clear then
adamc@403 800 List.app (fn (_, r) => r := SOME empty) unifs1
adamc@403 801 else
adamc@403 802 raise CUnify' (CRecordFailure (unsummarize s1, unsummarize s2))
adamc@403 803 | ((c1, _) :: rest1, (_, r2) :: rest2) =>
adamc@403 804 (r2 := SOME c1;
adamc@403 805 pairOffUnifs (rest1, rest2))
adamc@403 806 in
adamc@403 807 pairOffUnifs (unifs1, unifs2)
adamc@403 808 (*before eprefaces "Summaries'" [("#1", p_summary env s1),
adamc@403 809 ("#2", p_summary env s2)]*)
adamc@403 810 end
adamc@403 811
adamc@628 812 and guessMap env (c1, c2, ex) =
adamc@403 813 let
adamc@403 814 val loc = #2 c1
adamc@403 815
adamc@621 816 fun unfold (dom, ran, f, r, c) =
adamc@403 817 let
adamc@621 818 fun unfold (r, c) =
adamc@628 819 case #1 c of
adamc@628 820 L'.CRecord (_, []) => unifyCons env r (L'.CRecord (dom, []), loc)
adamc@628 821 | L'.CRecord (_, [(x, v)]) =>
adamc@628 822 let
adamc@628 823 val v' = case dom of
adamc@628 824 (L'.KUnit, _) => (L'.CUnit, loc)
adamc@628 825 | _ => cunif (loc, dom)
adamc@628 826 in
adamc@628 827 unifyCons env v (L'.CApp (f, v'), loc);
adamc@628 828 unifyCons env r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 829 end
adamc@628 830 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 831 let
adamc@628 832 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 833 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 834 in
adamc@628 835 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 836 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@628 837 unifyCons env r (L'.CConcat (r1, r2), loc)
adamc@628 838 end
adamc@628 839 | L'.CConcat (c1', c2') =>
adamc@628 840 let
adamc@628 841 val r1 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 842 val r2 = cunif (loc, (L'.KRecord dom, loc))
adamc@628 843 in
adamc@628 844 unfold (r1, c1');
adamc@628 845 unfold (r2, c2');
adamc@628 846 unifyCons env r (L'.CConcat (r1, r2), loc)
adamc@628 847 end
adamc@628 848 | _ => raise ex
adamc@403 849 in
adamc@621 850 unfold (r, c)
adamc@403 851 end
adamc@632 852 handle _ => raise ex
adamc@403 853 in
adamc@403 854 case (#1 c1, #1 c2) of
adamc@621 855 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 856 unfold (dom, ran, f, r, c2)
adamc@621 857 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 858 unfold (dom, ran, f, r, c1)
adamc@403 859 | _ => raise ex
adamc@403 860 end
adamc@403 861
adamc@628 862 and unifyCons' env c1 c2 =
adamc@628 863 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 864 ()
adamc@628 865 else
adamc@403 866 let
adamc@628 867 (*val befor = Time.now ()
adamc@628 868 val old1 = c1
adamc@628 869 val old2 = c2*)
adamc@628 870 val c1 = hnormCon env c1
adamc@628 871 val c2 = hnormCon env c2
adamc@403 872 in
adamc@628 873 unifyCons'' env c1 c2
adamc@628 874 handle ex => guessMap env (c1, c2, ex)
adamc@403 875 end
adamc@628 876
adamc@628 877 and unifyCons'' env (c1All as (c1, loc)) (c2All as (c2, _)) =
adamc@403 878 let
adamc@403 879 fun err f = raise CUnify' (f (c1All, c2All))
adamc@403 880
adamc@628 881 fun isRecord () = unifyRecordCons env (c1All, c2All)
adamc@403 882 in
adamc@403 883 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@403 884 ("c2All", p_con env c2All)];*)
adamc@403 885
adamc@403 886 case (c1, c2) of
adamc@632 887 (L'.CError, _) => ()
adamc@632 888 | (_, L'.CError) => ()
adamc@632 889
adamc@632 890 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@632 891 if r1 = r2 then
adamc@632 892 ()
adamc@632 893 else
adamc@632 894 (unifyKinds env k1 k2;
adamc@632 895 r1 := SOME c2All)
adamc@632 896
adamc@632 897 | (L'.CUnif (_, _, _, r), _) =>
adamc@632 898 if occursCon r c2All then
adamc@632 899 err COccursCheckFailed
adamc@632 900 else
adamc@632 901 r := SOME c2All
adamc@632 902 | (_, L'.CUnif (_, _, _, r)) =>
adamc@632 903 if occursCon r c1All then
adamc@632 904 err COccursCheckFailed
adamc@632 905 else
adamc@632 906 r := SOME c1All
adamc@632 907
adamc@632 908 | (L'.CUnit, L'.CUnit) => ()
adamc@403 909
adamc@403 910 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@628 911 (unifyCons' env d1 d2;
adamc@628 912 unifyCons' env r1 r2)
adamc@403 913 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@403 914 if expl1 <> expl2 then
adamc@403 915 err CExplicitness
adamc@403 916 else
adamc@623 917 (unifyKinds env d1 d2;
adamc@514 918 let
adamc@514 919 (*val befor = Time.now ()*)
adamc@514 920 val env' = E.pushCRel env x1 d1
adamc@514 921 in
adamc@514 922 (*TextIO.print ("E.pushCRel: "
adamc@514 923 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@514 924 ^ "\n");*)
adamc@628 925 unifyCons' env' r1 r2
adamc@514 926 end)
adamc@628 927 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env r1 r2
adamc@628 928 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@628 929 (unifyCons' env c1 c2;
adamc@628 930 unifyCons' env d1 d2;
adamc@628 931 unifyCons' env e1 e2)
adamc@403 932
adamc@403 933 | (L'.CRel n1, L'.CRel n2) =>
adamc@403 934 if n1 = n2 then
adamc@628 935 ()
adamc@403 936 else
adamc@403 937 err CIncompatible
adamc@403 938 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@403 939 if n1 = n2 then
adamc@628 940 ()
adamc@403 941 else
adamc@403 942 err CIncompatible
adamc@403 943
adamc@403 944 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@628 945 (unifyCons' env d1 d2;
adamc@628 946 unifyCons' env r1 r2)
adamc@403 947 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@623 948 (unifyKinds env k1 k2;
adamc@628 949 unifyCons' (E.pushCRel env x1 k1) c1 c2)
adamc@403 950
adamc@403 951 | (L'.CName n1, L'.CName n2) =>
adamc@403 952 if n1 = n2 then
adamc@628 953 ()
adamc@403 954 else
adamc@403 955 err CIncompatible
adamc@403 956
adamc@403 957 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@403 958 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@628 959 ()
adamc@403 960 else
adamc@403 961 err CIncompatible
adamc@403 962
adamc@403 963 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@628 964 ((ListPair.appEq (fn (c1, c2) => unifyCons' env c1 c2) (cs1, cs2))
adamc@403 965 handle ListPair.UnequalLengths => err CIncompatible)
adamc@403 966
adamc@632 967 | (L'.CProj (c1, n1), _) =>
adamc@403 968 let
adamc@632 969 fun trySnd () =
adamc@632 970 case #1 (hnormCon env c2All) of
adamc@632 971 L'.CProj (c2, n2) =>
adamc@632 972 let
adamc@632 973 fun tryNormal () =
adamc@632 974 if n1 = n2 then
adamc@632 975 unifyCons' env c1 c2
adamc@632 976 else
adamc@632 977 err CIncompatible
adamc@632 978 in
adamc@632 979 case #1 (hnormCon env c2) of
adamc@632 980 L'.CUnif (_, k, _, r) =>
adamc@632 981 (case #1 (hnormKind k) of
adamc@632 982 L'.KTuple ks =>
adamc@632 983 let
adamc@632 984 val loc = #2 c2
adamc@632 985 val us = map (fn k => cunif (loc, k)) ks
adamc@632 986 in
adamc@632 987 r := SOME (L'.CTuple us, loc);
adamc@632 988 unifyCons' env c1All (List.nth (us, n2 - 1))
adamc@632 989 end
adamc@632 990 | _ => tryNormal ())
adamc@632 991 | _ => tryNormal ()
adamc@632 992 end
adamc@632 993 | _ => err CIncompatible
adamc@403 994 in
adamc@632 995 case #1 (hnormCon env c1) of
adamc@632 996 L'.CUnif (_, k, _, r) =>
adamc@632 997 (case #1 (hnormKind k) of
adamc@632 998 L'.KTuple ks =>
adamc@632 999 let
adamc@632 1000 val loc = #2 c1
adamc@632 1001 val us = map (fn k => cunif (loc, k)) ks
adamc@632 1002 in
adamc@632 1003 r := SOME (L'.CTuple us, loc);
adamc@632 1004 unifyCons' env (List.nth (us, n1 - 1)) c2All
adamc@632 1005 end
adamc@632 1006 | _ => trySnd ())
adamc@632 1007 | _ => trySnd ()
adamc@403 1008 end
adamc@632 1009
adamc@632 1010 | (_, L'.CProj (c2, n2)) =>
adamc@632 1011 (case #1 (hnormCon env c2) of
adamc@632 1012 L'.CUnif (_, k, _, r) =>
adamc@632 1013 (case #1 (hnormKind k) of
adamc@632 1014 L'.KTuple ks =>
adamc@632 1015 let
adamc@632 1016 val loc = #2 c2
adamc@632 1017 val us = map (fn k => cunif (loc, k)) ks
adamc@632 1018 in
adamc@632 1019 r := SOME (L'.CTuple us, loc);
adamc@632 1020 unifyCons' env c1All (List.nth (us, n2 - 1))
adamc@632 1021 end
adamc@632 1022 | _ => err CIncompatible)
adamc@632 1023 | _ => err CIncompatible)
adamc@403 1024
adamc@623 1025 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1026 (unifyKinds env dom1 dom2;
adamc@628 1027 unifyKinds env ran1 ran2)
adamc@623 1028
adamc@623 1029 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@628 1030 unifyCons' (E.pushKRel env x) c1 c2
adamc@623 1031 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1032 (unifyKinds env k1 k2;
adamc@628 1033 unifyCons' env c1 c2)
adamc@623 1034 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@628 1035 unifyCons' (E.pushKRel env x) c1 c2
adamc@628 1036
adamc@403 1037 | (L'.CRecord _, _) => isRecord ()
adamc@403 1038 | (_, L'.CRecord _) => isRecord ()
adamc@403 1039 | (L'.CConcat _, _) => isRecord ()
adamc@403 1040 | (_, L'.CConcat _) => isRecord ()
adamc@403 1041
adamc@403 1042 | _ => err CIncompatible
adamc@403 1043 end
adamc@403 1044
adamc@628 1045 and unifyCons env c1 c2 =
adamc@628 1046 unifyCons' env c1 c2
adamc@403 1047 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@403 1048 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@403 1049
adamc@628 1050 fun checkCon env e c1 c2 =
adamc@628 1051 unifyCons env c1 c2
adamc@403 1052 handle CUnify (c1, c2, err) =>
adamc@628 1053 expError env (Unify (e, c1, c2, err))
adamc@628 1054
adamc@628 1055 fun checkPatCon env p c1 c2 =
adamc@628 1056 unifyCons env c1 c2
adamc@403 1057 handle CUnify (c1, c2, err) =>
adamc@628 1058 expError env (PatUnify (p, c1, c2, err))
adamc@71 1059
adamc@403 1060 fun primType env p =
adamc@403 1061 case p of
adamc@403 1062 P.Int _ => !int
adamc@403 1063 | P.Float _ => !float
adamc@403 1064 | P.String _ => !string
adamc@623 1065
adamc@403 1066 datatype constraint =
adamc@403 1067 Disjoint of D.goal
adamc@403 1068 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1069
adamc@403 1070 val enD = map Disjoint
adamc@403 1071
adamc@634 1072 fun isClassOrFolder env cl =
adamc@634 1073 E.isClass env cl
adamc@634 1074 orelse case hnormCon env cl of
adamc@634 1075 (L'.CKApp (cl, _), _) =>
adamc@634 1076 (case hnormCon env cl of
adamc@634 1077 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1078 | _ => false)
adamc@634 1079 | _ => false
adamc@634 1080
adamc@629 1081 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1082 let
adamc@403 1083 fun unravel (t, e) =
adamc@628 1084 case hnormCon env t of
adamc@628 1085 (L'.TKFun (x, t'), _) =>
adamc@628 1086 let
adamc@628 1087 val u = kunif loc
adamc@628 1088
adamc@628 1089 val t'' = subKindInCon (0, u) t'
adamc@628 1090 in
adamc@628 1091 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1092 end
adamc@628 1093 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1094 let
adamc@628 1095 val u = cunif (loc, k)
adamc@628 1096
adamc@628 1097 val t'' = subConInCon (0, u) t'
adamc@628 1098 in
adamc@628 1099 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1100 end
adamc@633 1101 | (L'.TFun (dom, ran), _) =>
adamc@628 1102 let
adamc@633 1103 fun default () = (e, t, [])
adamc@628 1104 in
adamc@633 1105 case #1 (hnormCon env dom) of
adamc@633 1106 L'.CApp (cl, x) =>
adamc@628 1107 let
adamc@633 1108 val cl = hnormCon env cl
adamc@628 1109 in
adamc@633 1110 if infer <> L.TypesOnly then
adamc@634 1111 if isClassOrFolder env cl then
adamc@633 1112 let
adamc@633 1113 val r = ref NONE
adamc@633 1114 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@633 1115 in
adamc@633 1116 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@633 1117 end
adamc@633 1118 else
adamc@634 1119 default ()
adamc@633 1120 else
adamc@633 1121 default ()
adamc@628 1122 end
adamc@633 1123 | _ => default ()
adamc@628 1124 end
adamc@629 1125 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1126 if infer <> L.TypesOnly then
adamc@629 1127 let
adamc@629 1128 val gs = D.prove env denv (r1, r2, loc)
adamc@629 1129 val (e, t, gs') = unravel (t', e)
adamc@629 1130 in
adamc@629 1131 (e, t, enD gs @ gs')
adamc@629 1132 end
adamc@629 1133 else
adamc@629 1134 (e, t, [])
adamc@628 1135 | t => (e, t, [])
adamc@15 1136 in
adamc@403 1137 case infer of
adamc@403 1138 L.DontInfer => (e, t, [])
adamc@403 1139 | _ => unravel (t, e)
adamc@15 1140 end
adamc@15 1141
adamc@628 1142 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1143 let
adamc@171 1144 val perror = (L'.PWild, loc)
adamc@171 1145 val terror = (L'.CError, loc)
adamc@171 1146 val pterror = (perror, terror)
adamc@171 1147 val rerror = (pterror, (env, bound))
adamc@171 1148
adamc@191 1149 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1150 case (po, to) of
adamc@188 1151 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1152 rerror)
adamc@188 1153 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1154 rerror)
adamc@191 1155 | (NONE, NONE) =>
adamc@191 1156 let
adamc@191 1157 val k = (L'.KType, loc)
adamc@191 1158 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1159 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1160 in
adamc@191 1161 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1162 (env, bound))
adamc@191 1163 end
adamc@188 1164 | (SOME p, SOME t) =>
adamc@188 1165 let
adamc@628 1166 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1167
adamc@191 1168 val k = (L'.KType, loc)
adamc@191 1169 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1170 val nxs = length unifs - 1
adamc@194 1171 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1172 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1173 in
adamc@628 1174 ignore (checkPatCon env p' pt t);
adamc@191 1175 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1176 (env, bound))
adamc@188 1177 end
adamc@171 1178 in
adamc@171 1179 case p of
adamc@171 1180 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1181 (env, bound))
adamc@171 1182 | L.PVar x =>
adamc@171 1183 let
adamc@171 1184 val t = if SS.member (bound, x) then
adamc@171 1185 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1186 terror)
adamc@171 1187 else
adamc@171 1188 cunif (loc, (L'.KType, loc))
adamc@171 1189 in
adamc@182 1190 (((L'.PVar (x, t), loc), t),
adamc@171 1191 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1192 end
adamc@173 1193 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1194 (env, bound))
adamc@171 1195 | L.PCon ([], x, po) =>
adamc@171 1196 (case E.lookupConstructor env x of
adamc@174 1197 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1198 rerror)
adamc@191 1199 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1200 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1201 (case E.lookupStr env m1 of
adamc@174 1202 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1203 rerror)
adamc@174 1204 | SOME (n, sgn) =>
adamc@174 1205 let
adamc@174 1206 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1207 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1208 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1209 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1210 ((L'.StrVar n, loc), sgn) ms
adamc@174 1211 in
adamc@174 1212 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1213 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1214 rerror)
adamc@191 1215 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1216 end)
adamc@174 1217
adamc@175 1218 | L.PRecord (xps, flex) =>
adamc@175 1219 let
adamc@175 1220 val (xpts, (env, bound, _)) =
adamc@175 1221 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1222 let
adamc@628 1223 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1224 in
adamc@175 1225 if SS.member (fbound, x) then
adamc@175 1226 expError env (DuplicatePatField (loc, x))
adamc@175 1227 else
adamc@175 1228 ();
adamc@175 1229 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1230 end)
adamc@175 1231 (env, bound, SS.empty) xps
adamc@175 1232
adamc@175 1233 val k = (L'.KType, loc)
adamc@175 1234 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1235 val c =
adamc@175 1236 if flex then
adamc@176 1237 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1238 else
adamc@176 1239 c
adamc@175 1240 in
adamc@182 1241 (((L'.PRecord xpts, loc),
adamc@175 1242 (L'.TRecord c, loc)),
adamc@175 1243 (env, bound))
adamc@175 1244 end
adamc@175 1245
adamc@171 1246 end
adamc@171 1247
adamc@172 1248 datatype coverage =
adamc@172 1249 Wild
adamc@173 1250 | None
adamc@172 1251 | Datatype of coverage IM.map
adamc@175 1252 | Record of coverage SM.map list
adamc@172 1253
adamc@243 1254 fun c2s c =
adamc@243 1255 case c of
adamc@243 1256 Wild => "Wild"
adamc@243 1257 | None => "None"
adamc@243 1258 | Datatype _ => "Datatype"
adamc@243 1259 | Record _ => "Record"
adamc@243 1260
adamc@629 1261 fun exhaustive (env, t, ps, loc) =
adamc@172 1262 let
adamc@402 1263 fun depth (p, _) =
adamc@402 1264 case p of
adamc@402 1265 L'.PWild => 0
adamc@402 1266 | L'.PVar _ => 0
adamc@402 1267 | L'.PPrim _ => 0
adamc@402 1268 | L'.PCon (_, _, _, NONE) => 1
adamc@402 1269 | L'.PCon (_, _, _, SOME p) => 1 + depth p
adamc@402 1270 | L'.PRecord xps => foldl (fn ((_, p, _), n) => Int.max (depth p, n)) 0 xps
adamc@402 1271
adamc@402 1272 val depth = 1 + foldl (fn (p, n) => Int.max (depth p, n)) 0 ps
adamc@402 1273
adamc@172 1274 fun pcCoverage pc =
adamc@172 1275 case pc of
adamc@172 1276 L'.PConVar n => n
adamc@174 1277 | L'.PConProj (m1, ms, x) =>
adamc@174 1278 let
adamc@174 1279 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1280 in
adamc@174 1281 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1282 NONE => raise Fail "exhaustive: Can't project constructor"
adamc@191 1283 | SOME (_, n, _, _, _) => n
adamc@174 1284 end
adamc@172 1285
adamc@172 1286 fun coverage (p, _) =
adamc@172 1287 case p of
adamc@172 1288 L'.PWild => Wild
adamc@172 1289 | L'.PVar _ => Wild
adamc@173 1290 | L'.PPrim _ => None
adamc@191 1291 | L'.PCon (_, pc, _, NONE) => Datatype (IM.insert (IM.empty, pcCoverage pc, Wild))
adamc@191 1292 | L'.PCon (_, pc, _, SOME p) => Datatype (IM.insert (IM.empty, pcCoverage pc, coverage p))
adamc@182 1293 | L'.PRecord xps => Record [foldl (fn ((x, p, _), fmap) =>
adamc@182 1294 SM.insert (fmap, x, coverage p)) SM.empty xps]
adamc@176 1295
adamc@172 1296 fun merge (c1, c2) =
adamc@172 1297 case (c1, c2) of
adamc@173 1298 (None, _) => c2
adamc@173 1299 | (_, None) => c1
adamc@173 1300
adamc@173 1301 | (Wild, _) => Wild
adamc@172 1302 | (_, Wild) => Wild
adamc@172 1303
adamc@172 1304 | (Datatype cm1, Datatype cm2) => Datatype (IM.unionWith merge (cm1, cm2))
adamc@172 1305
adamc@175 1306 | (Record fm1, Record fm2) => Record (fm1 @ fm2)
adamc@175 1307
adamc@175 1308 | _ => None
adamc@175 1309
adamc@172 1310 fun combinedCoverage ps =
adamc@172 1311 case ps of
adamc@172 1312 [] => raise Fail "Empty pattern list for coverage checking"
adamc@172 1313 | [p] => coverage p
adamc@172 1314 | p :: ps => merge (coverage p, combinedCoverage ps)
adamc@172 1315
adamc@402 1316 fun enumerateCases depth t =
adamc@402 1317 if depth = 0 then
adamc@402 1318 [Wild]
adamc@402 1319 else
adamc@402 1320 let
adamc@402 1321 fun dtype cons =
adamc@402 1322 ListUtil.mapConcat (fn (_, n, to) =>
adamc@402 1323 case to of
adamc@402 1324 NONE => [Datatype (IM.insert (IM.empty, n, Wild))]
adamc@402 1325 | SOME t => map (fn c => Datatype (IM.insert (IM.empty, n, c)))
adamc@402 1326 (enumerateCases (depth-1) t)) cons
adamc@402 1327 in
adamc@628 1328 case #1 (hnormCon env t) of
adamc@402 1329 L'.CNamed n =>
adamc@402 1330 (let
adamc@402 1331 val dt = E.lookupDatatype env n
adamc@402 1332 val cons = E.constructors dt
adamc@175 1333 in
adamc@402 1334 dtype cons
adamc@402 1335 end handle E.UnboundNamed _ => [Wild])
adamc@402 1336 | L'.TRecord c =>
adamc@628 1337 (case #1 (hnormCon env c) of
adamc@402 1338 L'.CRecord (_, xts) =>
adamc@402 1339 let
adamc@628 1340 val xts = map (fn (x, t) => (hnormCon env x, t)) xts
adamc@402 1341
adamc@402 1342 fun exponentiate fs =
adamc@402 1343 case fs of
adamc@402 1344 [] => [SM.empty]
adamc@402 1345 | ((L'.CName x, _), t) :: rest =>
adamc@402 1346 let
adamc@402 1347 val this = enumerateCases depth t
adamc@402 1348 val rest = exponentiate rest
adamc@402 1349 in
adamc@402 1350 ListUtil.mapConcat (fn fmap =>
adamc@402 1351 map (fn c => SM.insert (fmap, x, c)) this) rest
adamc@402 1352 end
adamc@402 1353 | _ => raise Fail "exponentiate: Not CName"
adamc@402 1354 in
adamc@402 1355 if List.exists (fn ((L'.CName _, _), _) => false
adamc@402 1356 | (c, _) => true) xts then
adamc@402 1357 [Wild]
adamc@402 1358 else
adamc@402 1359 map (fn ls => Record [ls]) (exponentiate xts)
adamc@402 1360 end
adamc@402 1361 | _ => [Wild])
adamc@402 1362 | _ => [Wild]
adamc@402 1363 end
adamc@175 1364
adamc@175 1365 fun coverageImp (c1, c2) =
adamc@243 1366 let
adamc@243 1367 val r =
adamc@243 1368 case (c1, c2) of
adamc@243 1369 (Wild, _) => true
adamc@243 1370
adamc@243 1371 | (Datatype cmap1, Datatype cmap2) =>
adamc@243 1372 List.all (fn (n, c2) =>
adamc@243 1373 case IM.find (cmap1, n) of
adamc@243 1374 NONE => false
adamc@243 1375 | SOME c1 => coverageImp (c1, c2)) (IM.listItemsi cmap2)
adamc@243 1376 | (Datatype cmap1, Wild) =>
adamc@243 1377 List.all (fn (n, c1) => coverageImp (c1, Wild)) (IM.listItemsi cmap1)
adamc@243 1378
adamc@243 1379 | (Record fmaps1, Record fmaps2) =>
adamc@243 1380 List.all (fn fmap2 =>
adamc@243 1381 List.exists (fn fmap1 =>
adamc@243 1382 List.all (fn (x, c2) =>
adamc@243 1383 case SM.find (fmap1, x) of
adamc@243 1384 NONE => true
adamc@243 1385 | SOME c1 => coverageImp (c1, c2))
adamc@243 1386 (SM.listItemsi fmap2))
adamc@243 1387 fmaps1) fmaps2
adamc@243 1388
adamc@243 1389 | (Record fmaps1, Wild) =>
adamc@243 1390 List.exists (fn fmap1 =>
adamc@243 1391 List.all (fn (x, c1) => coverageImp (c1, Wild))
adamc@243 1392 (SM.listItemsi fmap1)) fmaps1
adamc@243 1393
adamc@243 1394 | _ => false
adamc@243 1395 in
adamc@243 1396 (*TextIO.print ("coverageImp(" ^ c2s c1 ^ ", " ^ c2s c2 ^ ") = " ^ Bool.toString r ^ "\n");*)
adamc@243 1397 r
adamc@243 1398 end
adamc@175 1399
adamc@172 1400 fun isTotal (c, t) =
adamc@172 1401 case c of
adamc@628 1402 None => false
adamc@628 1403 | Wild => true
adamc@172 1404 | Datatype cm =>
adamc@172 1405 let
adamc@628 1406 val (t, _) = hnormCon env t
adamc@628 1407
adamc@628 1408 val dtype =
adamc@628 1409 List.all (fn (_, n, to) =>
adamc@628 1410 case IM.find (cm, n) of
adamc@628 1411 NONE => false
adamc@628 1412 | SOME c' =>
adamc@628 1413 case to of
adamc@628 1414 NONE => true
adamc@628 1415 | SOME t' => isTotal (c', t'))
adamc@191 1416
adamc@191 1417 fun unapp t =
adamc@191 1418 case t of
adamc@191 1419 L'.CApp ((t, _), _) => unapp t
adamc@191 1420 | _ => t
adamc@172 1421 in
adamc@191 1422 case unapp t of
adamc@172 1423 L'.CNamed n =>
adamc@172 1424 let
adamc@172 1425 val dt = E.lookupDatatype env n
adamc@172 1426 val cons = E.constructors dt
adamc@172 1427 in
adamc@174 1428 dtype cons
adamc@174 1429 end
adamc@174 1430 | L'.CModProj (m1, ms, x) =>
adamc@174 1431 let
adamc@174 1432 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1433 in
adamc@174 1434 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@174 1435 NONE => raise Fail "isTotal: Can't project datatype"
adamc@191 1436 | SOME (_, cons) => dtype cons
adamc@172 1437 end
adamc@628 1438 | L'.CError => true
adamc@341 1439 | c =>
adamc@629 1440 (prefaces "Not a datatype" [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@629 1441 ("c", p_con env (c, ErrorMsg.dummySpan))];
adamc@341 1442 raise Fail "isTotal: Not a datatype")
adamc@172 1443 end
adamc@628 1444 | Record _ => List.all (fn c2 => coverageImp (c, c2)) (enumerateCases depth t)
adamc@172 1445 in
adamc@172 1446 isTotal (combinedCoverage ps, t)
adamc@172 1447 end
adamc@172 1448
adamc@217 1449 fun unmodCon env (c, loc) =
adamc@217 1450 case c of
adamc@217 1451 L'.CNamed n =>
adamc@217 1452 (case E.lookupCNamed env n of
adamc@217 1453 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1454 | _ => (c, loc))
adamc@217 1455 | L'.CModProj (m1, ms, x) =>
adamc@217 1456 let
adamc@217 1457 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1458 in
adamc@217 1459 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1460 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1461 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1462 | _ => (c, loc)
adamc@217 1463 end
adamc@217 1464 | _ => (c, loc)
adamc@217 1465
adamc@467 1466 fun normClassKey envs c =
adamc@467 1467 let
adamc@628 1468 val c = hnormCon envs c
adamc@467 1469 in
adamc@467 1470 case #1 c of
adamc@467 1471 L'.CApp (c1, c2) =>
adamc@467 1472 let
adamc@467 1473 val c1 = normClassKey envs c1
adamc@467 1474 val c2 = normClassKey envs c2
adamc@467 1475 in
adamc@467 1476 (L'.CApp (c1, c2), #2 c)
adamc@467 1477 end
adamc@467 1478 | _ => c
adamc@467 1479 end
adamc@467 1480
adamc@467 1481 fun normClassConstraint env (c, loc) =
adamc@217 1482 case c of
adamc@217 1483 L'.CApp (f, x) =>
adamc@217 1484 let
adamc@467 1485 val f = unmodCon env f
adamc@467 1486 val x = normClassKey env x
adamc@217 1487 in
adamc@467 1488 (L'.CApp (f, x), loc)
adamc@217 1489 end
adamc@467 1490 | L'.CUnif (_, _, _, ref (SOME c)) => normClassConstraint env c
adamc@467 1491 | _ => (c, loc)
adamc@216 1492
adamc@92 1493 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1494 let
adamc@280 1495 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@514 1496 (*val befor = Time.now ()*)
adamc@280 1497
adamc@280 1498 val r = case e of
adamc@91 1499 L.EAnnot (e, t) =>
adamc@91 1500 let
adamc@91 1501 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1502 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1503 in
adamc@628 1504 checkCon env e' et t';
adamc@628 1505 (e', t', gs1 @ enD gs2)
adamc@91 1506 end
adamc@34 1507
adamc@91 1508 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 1509 | L.EVar ([], s, infer) =>
adamc@91 1510 (case E.lookupE env s of
adamc@91 1511 E.NotBound =>
adamc@91 1512 (expError env (UnboundExp (loc, s));
adamc@91 1513 (eerror, cerror, []))
adamc@629 1514 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 1515 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 1516 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 1517 (case E.lookupStr env m1 of
adamc@91 1518 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1519 (eerror, cerror, []))
adamc@91 1520 | SOME (n, sgn) =>
adamc@91 1521 let
adamc@91 1522 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1523 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1524 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1525 (strerror, sgnerror))
adamc@91 1526 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1527 ((L'.StrVar n, loc), sgn) ms
adamc@10 1528
adamc@91 1529 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1530 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1531 cerror)
adamc@91 1532 | SOME t => t
adamc@91 1533 in
adamc@629 1534 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 1535 end)
adamc@86 1536
adamc@349 1537 | L.EWild =>
adamc@210 1538 let
adamc@349 1539 val r = ref NONE
adamc@349 1540 val c = cunif (loc, (L'.KType, loc))
adamc@210 1541 in
adamc@349 1542 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 1543 end
adamc@210 1544
adamc@91 1545 | L.EApp (e1, e2) =>
adamc@91 1546 let
adamc@91 1547 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@403 1548 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 1549
adamc@91 1550 val dom = cunif (loc, ktype)
adamc@91 1551 val ran = cunif (loc, ktype)
adamc@91 1552 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1553 in
adamc@628 1554 checkCon env e1' t1 t;
adamc@628 1555 checkCon env e2' t2 dom;
adamc@628 1556 ((L'.EApp (e1', e2'), loc), ran, gs1 @ gs2)
adamc@91 1557 end
adamc@91 1558 | L.EAbs (x, to, e) =>
adamc@91 1559 let
adamc@91 1560 val (t', gs1) = case to of
adamc@91 1561 NONE => (cunif (loc, ktype), [])
adamc@91 1562 | SOME t =>
adamc@91 1563 let
adamc@91 1564 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1565 in
adamc@91 1566 checkKind env t' tk ktype;
adamc@91 1567 (t', gs)
adamc@91 1568 end
adamc@467 1569 val dom = normClassConstraint env t'
adamc@467 1570 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 1571 in
adamc@91 1572 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1573 (L'.TFun (t', et), loc),
adamc@467 1574 enD gs1 @ gs2)
adamc@91 1575 end
adamc@91 1576 | L.ECApp (e, c) =>
adamc@91 1577 let
adamc@91 1578 val (e', et, gs1) = elabExp (env, denv) e
adamc@328 1579 val oldEt = et
adamc@403 1580 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 1581 val (et', _) = hnormCon env et
adamc@91 1582 in
adamc@91 1583 case et' of
adamc@91 1584 L'.CError => (eerror, cerror, [])
adamc@328 1585 | L'.TCFun (_, x, k, eb) =>
adamc@91 1586 let
adamc@91 1587 val () = checkKind env c' ck k
adamc@91 1588 val eb' = subConInCon (0, c') eb
adamc@339 1589 handle SynUnif => (expError env (Unif ("substitution", loc, eb));
adamc@91 1590 cerror)
adamc@91 1591 in
adamc@328 1592 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 1593 ("et", p_con env oldEt),
adamc@328 1594 ("x", PD.string x),
adamc@328 1595 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 1596 ("c", p_con env c'),
adamc@328 1597 ("eb'", p_con env eb')];*)
adamc@628 1598 ((L'.ECApp (e', c'), loc), eb', gs1 @ enD gs2)
adamc@91 1599 end
adamc@91 1600
adamc@91 1601 | _ =>
adamc@91 1602 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1603 (eerror, cerror, []))
adamc@91 1604 end
adamc@91 1605 | L.ECAbs (expl, x, k, e) =>
adamc@91 1606 let
adamc@91 1607 val expl' = elabExplicitness expl
adamc@623 1608 val k' = elabKind env k
adamc@328 1609
adamc@328 1610 val env' = E.pushCRel env x k'
adamc@328 1611 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 1612 in
adamc@91 1613 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1614 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1615 gs)
adamc@91 1616 end
adamc@623 1617 | L.EKAbs (x, e) =>
adamc@623 1618 let
adamc@623 1619 val env' = E.pushKRel env x
adamc@623 1620 val (e', et, gs) = elabExp (env', denv) e
adamc@623 1621 in
adamc@623 1622 ((L'.EKAbs (x, e'), loc),
adamc@623 1623 (L'.TKFun (x, et), loc),
adamc@623 1624 gs)
adamc@623 1625 end
adamc@91 1626
adamc@91 1627 | L.EDisjoint (c1, c2, e) =>
adamc@91 1628 let
adamc@91 1629 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1630 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1631
adamc@91 1632 val ku1 = kunif loc
adamc@91 1633 val ku2 = kunif loc
adamc@91 1634
adamc@628 1635 val denv' = D.assert env denv (c1', c2')
adamc@628 1636 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 1637 in
adamc@91 1638 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1639 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1640
adamc@628 1641 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 1642 end
adamc@629 1643 | L.EDisjointApp e =>
adamc@629 1644 let
adamc@629 1645 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 1646
adamc@629 1647 val k1 = kunif loc
adamc@629 1648 val c1 = cunif (loc, (L'.KRecord k1, loc))
adamc@629 1649 val k2 = kunif loc
adamc@629 1650 val c2 = cunif (loc, (L'.KRecord k2, loc))
adamc@629 1651 val t' = cunif (loc, ktype)
adamc@629 1652 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 1653 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 1654 in
adamc@629 1655 (e', t', enD gs2 @ gs1)
adamc@629 1656 end
adamc@91 1657
adamc@91 1658 | L.ERecord xes =>
adamc@91 1659 let
adamc@91 1660 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1661 let
adamc@91 1662 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1663 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1664 in
adamc@91 1665 checkKind env x' xk kname;
adamc@228 1666 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 1667 end)
adamc@91 1668 [] xes
adamc@91 1669
adamc@91 1670 val k = (L'.KType, loc)
adamc@91 1671
adamc@91 1672 fun prove (xets, gs) =
adamc@91 1673 case xets of
adamc@91 1674 [] => gs
adamc@91 1675 | (x, _, t) :: rest =>
adamc@91 1676 let
adamc@91 1677 val xc = (x, t)
adamc@91 1678 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1679 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1680 let
adamc@91 1681 val xc' = (x', t')
adamc@91 1682 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1683 in
adamc@91 1684 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1685 end)
adamc@91 1686 gs rest
adamc@91 1687 in
adamc@91 1688 prove (rest, gs)
adamc@91 1689 end
adamc@228 1690
adamc@228 1691 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 1692 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 1693 in
adamc@255 1694 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 1695 ((L'.ERecord xes', loc),
adamc@91 1696 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 1697 enD (prove (xes', gsD)) @ gsO)
adamc@91 1698 end
adamc@91 1699
adamc@91 1700 | L.EField (e, c) =>
adamc@91 1701 let
adamc@91 1702 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1703 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1704
adamc@91 1705 val ft = cunif (loc, ktype)
adamc@91 1706 val rest = cunif (loc, ktype_record)
adamc@91 1707 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1708 val () = checkCon env e' et
adamc@629 1709 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 1710 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 1711 in
adamc@628 1712 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 1713 end
adamc@91 1714
adamc@445 1715 | L.EConcat (e1, e2) =>
adamc@339 1716 let
adamc@339 1717 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 1718 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 1719
adamc@445 1720 val r1 = cunif (loc, ktype_record)
adamc@445 1721 val r2 = cunif (loc, ktype_record)
adamc@445 1722
adamc@629 1723 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 1724 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 1725
adamc@628 1726 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 1727 in
adamc@445 1728 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 1729 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 1730 gs1 @ gs2 @ enD gs3)
adamc@339 1731 end
adamc@149 1732 | L.ECut (e, c) =>
adamc@149 1733 let
adamc@149 1734 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1735 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1736
adamc@149 1737 val ft = cunif (loc, ktype)
adamc@149 1738 val rest = cunif (loc, ktype_record)
adamc@149 1739 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 1740
adamc@629 1741 val () = checkCon env e' et
adamc@629 1742 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1743
adamc@628 1744 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 1745 in
adamc@228 1746 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1747 gs1 @ enD gs2 @ enD gs3)
adamc@149 1748 end
adamc@493 1749 | L.ECutMulti (e, c) =>
adamc@493 1750 let
adamc@493 1751 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 1752 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 1753
adamc@493 1754 val rest = cunif (loc, ktype_record)
adamc@629 1755
adamc@629 1756 val () = checkCon env e' et
adamc@629 1757 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 1758
adamc@628 1759 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 1760 in
adamc@493 1761 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 1762 gs1 @ enD gs2 @ enD gs3)
adamc@493 1763 end
adamc@149 1764
adamc@171 1765 | L.ECase (e, pes) =>
adamc@171 1766 let
adamc@171 1767 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1768 val result = cunif (loc, (L'.KType, loc))
adamc@171 1769 val (pes', gs) = ListUtil.foldlMap
adamc@171 1770 (fn ((p, e), gs) =>
adamc@171 1771 let
adamc@628 1772 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 1773
adamc@629 1774 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 1775 in
adamc@628 1776 checkPatCon env p' pt et;
adamc@629 1777 checkCon env e' et' result;
adamc@628 1778 ((p', e'), gs1 @ gs)
adamc@171 1779 end)
adamc@171 1780 gs1 pes
adamc@171 1781 in
adamc@629 1782 if exhaustive (env, et, map #1 pes', loc) then
adamc@172 1783 ()
adamc@172 1784 else
adamc@172 1785 expError env (Inexhaustive loc);
adamc@172 1786
adamc@628 1787 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 1788 end
adamc@447 1789
adamc@447 1790 | L.ELet (eds, e) =>
adamc@447 1791 let
adamc@447 1792 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 1793 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 1794 in
adamc@447 1795 ((L'.ELet (eds, e), loc), t, gs1 @ gs2)
adamc@447 1796 end
adamc@280 1797 in
adamc@513 1798 (*prefaces "elabExp" [("e", SourcePrint.p_exp eAll),
adamc@514 1799 ("t", PD.string (LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))))];*)
adamc@280 1800 r
adamc@91 1801 end
adamc@31 1802
adamc@628 1803 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 1804 let
adamc@447 1805 val r =
adamc@447 1806 case d of
adamc@447 1807 L.EDVal (x, co, e) =>
adamc@447 1808 let
adamc@447 1809 val (c', _, gs1) = case co of
adamc@447 1810 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 1811 | SOME c => elabCon (env, denv) c
adamc@447 1812
adamc@447 1813 val (e', et, gs2) = elabExp (env, denv) e
adamc@628 1814
adamc@629 1815 val () = checkCon env e' et c'
adamc@629 1816
adamc@467 1817 val c' = normClassConstraint env c'
adamc@447 1818 val env' = E.pushERel env x c'
adamc@447 1819 in
adamc@628 1820 ((L'.EDVal (x, c', e'), loc), (env', enD gs1 @ gs2 @ gs))
adamc@447 1821 end
adamc@447 1822 | L.EDValRec vis =>
adamc@447 1823 let
adamc@447 1824 fun allowable (e, _) =
adamc@447 1825 case e of
adamc@447 1826 L.EAbs _ => true
adamc@447 1827 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 1828 | L.EKAbs (_, e) => allowable e
adamc@447 1829 | L.EDisjoint (_, _, e) => allowable e
adamc@447 1830 | _ => false
adamc@447 1831
adamc@447 1832 val (vis, gs) = ListUtil.foldlMap
adamc@447 1833 (fn ((x, co, e), gs) =>
adamc@447 1834 let
adamc@447 1835 val (c', _, gs1) = case co of
adamc@447 1836 NONE => (cunif (loc, ktype), ktype, [])
adamc@447 1837 | SOME c => elabCon (env, denv) c
adamc@447 1838 in
adamc@447 1839 ((x, c', e), enD gs1 @ gs)
adamc@447 1840 end) gs vis
adamc@447 1841
adamc@447 1842 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 1843
adamc@447 1844 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 1845 let
adamc@447 1846 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 1847 in
adamc@628 1848 checkCon env e' et c';
adamc@447 1849 if allowable e then
adamc@447 1850 ()
adamc@447 1851 else
adamc@447 1852 expError env (IllegalRec (x, e'));
adamc@628 1853 ((x, c', e'), gs1 @ gs)
adamc@447 1854 end) gs vis
adamc@447 1855 in
adamc@447 1856 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 1857 end
adamc@447 1858 in
adamc@447 1859 r
adamc@447 1860 end
adamc@447 1861
adamc@42 1862 val hnormSgn = E.hnormSgn
adamc@31 1863
adamc@210 1864 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 1865 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@459 1866 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@205 1867
adamc@469 1868 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 1869 case E.lookupStr env str of
adamc@469 1870 NONE => (strError env (UnboundStr (loc, str));
adamc@469 1871 denv)
adamc@469 1872 | SOME (n, sgn) =>
adamc@469 1873 let
adamc@469 1874 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 1875 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 1876 NONE => (strError env (UnboundStr (loc, m));
adamc@469 1877 (strerror, sgnerror))
adamc@469 1878 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 1879 ((L'.StrVar n, loc), sgn) strs
adamc@469 1880
adamc@469 1881 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@469 1882 in
adamc@628 1883 case cso of
adamc@628 1884 NONE => (strError env (UnboundStr (loc, str));
adamc@628 1885 denv)
adamc@628 1886 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@628 1887 D.assert env denv (c1, c2)) denv cs
adamc@469 1888 end
adamc@469 1889
adamc@88 1890 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1891 case sgi of
adamc@76 1892 L.SgiConAbs (x, k) =>
adamc@76 1893 let
adamc@623 1894 val k' = elabKind env k
adamc@31 1895
adamc@76 1896 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1897 in
adamc@88 1898 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1899 end
adamc@31 1900
adamc@76 1901 | L.SgiCon (x, ko, c) =>
adamc@76 1902 let
adamc@76 1903 val k' = case ko of
adamc@76 1904 NONE => kunif loc
adamc@623 1905 | SOME k => elabKind env k
adamc@31 1906
adamc@83 1907 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1908 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1909 in
adamc@76 1910 checkKind env c' ck k';
adamc@31 1911
adamc@88 1912 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1913 end
adamc@31 1914
adamc@191 1915 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1916 let
adamc@157 1917 val k = (L'.KType, loc)
adamc@191 1918 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1919 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1920 val t = (L'.CNamed n, loc)
adamc@194 1921 val nxs = length xs - 1
adamc@194 1922 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1923
adamc@284 1924 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@284 1925 (E.pushCRel env' x k,
adamc@284 1926 D.enter denv')) (env, denv) xs
adamc@284 1927
adamc@157 1928 val (xcs, (used, env, gs)) =
adamc@157 1929 ListUtil.foldlMap
adamc@157 1930 (fn ((x, to), (used, env, gs)) =>
adamc@157 1931 let
adamc@157 1932 val (to, t, gs') = case to of
adamc@157 1933 NONE => (NONE, t, gs)
adamc@157 1934 | SOME t' =>
adamc@157 1935 let
adamc@284 1936 val (t', tk, gs') = elabCon (env', denv') t'
adamc@157 1937 in
adamc@284 1938 checkKind env' t' tk k;
adamc@157 1939 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1940 end
adamc@191 1941 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1942
adamc@157 1943 val (env, n') = E.pushENamed env x t
adamc@157 1944 in
adamc@157 1945 if SS.member (used, x) then
adamc@157 1946 strError env (DuplicateConstructor (x, loc))
adamc@157 1947 else
adamc@157 1948 ();
adamc@157 1949 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1950 end)
adamc@157 1951 (SS.empty, env, []) xcs
adamc@191 1952
adamc@191 1953 val env = E.pushDatatype env n xs xcs
adamc@157 1954 in
adamc@191 1955 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1956 end
adamc@156 1957
adamc@158 1958 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1959
adamc@158 1960 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1961 (case E.lookupStr env m1 of
adamc@158 1962 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1963 ([], (env, denv, gs)))
adamc@158 1964 | SOME (n, sgn) =>
adamc@158 1965 let
adamc@158 1966 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1967 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1968 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1969 (strerror, sgnerror))
adamc@158 1970 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1971 ((L'.StrVar n, loc), sgn) ms
adamc@158 1972 in
adamc@628 1973 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 1974 (L'.CModProj (n, ms, s), _) =>
adamc@161 1975 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1976 NONE => (conError env (UnboundDatatype (loc, s));
adamc@628 1977 ([], (env, denv, [])))
adamc@191 1978 | SOME (xs, xncs) =>
adamc@161 1979 let
adamc@161 1980 val k = (L'.KType, loc)
adamc@191 1981 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1982
adamc@161 1983 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1984 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1985 val env = E.pushDatatype env n' xs xncs
adamc@158 1986
adamc@161 1987 val t = (L'.CNamed n', loc)
adamc@161 1988 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1989 let
adamc@161 1990 val t = case to of
adamc@161 1991 NONE => t
adamc@161 1992 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1993
adamc@191 1994 val t = foldr (fn (x, t) =>
adamc@191 1995 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1996 t xs
adamc@161 1997 in
adamc@161 1998 E.pushENamedAs env x n t
adamc@161 1999 end) env xncs
adamc@161 2000 in
adamc@628 2001 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@161 2002 end)
adamc@161 2003 | _ => (strError env (NotDatatype loc);
adamc@161 2004 ([], (env, denv, [])))
adamc@158 2005 end)
adamc@156 2006
adamc@76 2007 | L.SgiVal (x, c) =>
adamc@76 2008 let
adamc@83 2009 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 2010
adamc@76 2011 val (env', n) = E.pushENamed env x c'
adamc@467 2012 val c' = normClassConstraint env c'
adamc@76 2013 in
adamc@623 2014 (unifyKinds env ck ktype
adamc@76 2015 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 2016
adamc@467 2017 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 2018 end
adamc@31 2019
adamc@76 2020 | L.SgiStr (x, sgn) =>
adamc@76 2021 let
adamc@83 2022 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2023 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2024 in
adamc@88 2025 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2026 end
adamc@31 2027
adamc@76 2028 | L.SgiSgn (x, sgn) =>
adamc@76 2029 let
adamc@83 2030 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2031 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 2032 in
adamc@88 2033 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2034 end
adamc@31 2035
adamc@76 2036 | L.SgiInclude sgn =>
adamc@76 2037 let
adamc@83 2038 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2039 in
adamc@76 2040 case #1 (hnormSgn env sgn') of
adamc@76 2041 L'.SgnConst sgis =>
adamc@88 2042 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 2043 | _ => (sgnError env (NotIncludable sgn');
adamc@88 2044 ([], (env, denv, [])))
adamc@88 2045 end
adamc@88 2046
adamc@88 2047 | L.SgiConstraint (c1, c2) =>
adamc@88 2048 let
adamc@88 2049 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 2050 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 2051
adamc@628 2052 val denv = D.assert env denv (c1', c2')
adamc@88 2053 in
adamc@88 2054 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 2055 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 2056
adamc@628 2057 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@76 2058 end
adamc@31 2059
adamc@563 2060 | L.SgiClassAbs (x, k) =>
adamc@211 2061 let
adamc@623 2062 val k = elabKind env k
adamc@563 2063 val k' = (L'.KArrow (k, (L'.KType, loc)), loc)
adamc@563 2064 val (env, n) = E.pushCNamed env x k' NONE
adamc@211 2065 val env = E.pushClass env n
adamc@211 2066 in
adamc@563 2067 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@211 2068 end
adamc@211 2069
adamc@563 2070 | L.SgiClass (x, k, c) =>
adamc@211 2071 let
adamc@623 2072 val k = elabKind env k
adamc@563 2073 val k' = (L'.KArrow (k, (L'.KType, loc)), loc)
adamc@211 2074 val (c', ck, gs) = elabCon (env, denv) c
adamc@563 2075 val (env, n) = E.pushCNamed env x k' (SOME c')
adamc@211 2076 val env = E.pushClass env n
adamc@211 2077 in
adamc@563 2078 checkKind env c' ck k';
adamc@563 2079 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@211 2080 end
adamc@211 2081
adamc@83 2082 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2083 case sgn of
adamc@31 2084 L.SgnConst sgis =>
adamc@31 2085 let
adamc@88 2086 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2087
adamc@62 2088 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2089 case sgi of
adamc@62 2090 L'.SgiConAbs (x, _, _) =>
adamc@62 2091 (if SS.member (cons, x) then
adamc@62 2092 sgnError env (DuplicateCon (loc, x))
adamc@62 2093 else
adamc@62 2094 ();
adamc@62 2095 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2096 | L'.SgiCon (x, _, _, _) =>
adamc@62 2097 (if SS.member (cons, x) then
adamc@62 2098 sgnError env (DuplicateCon (loc, x))
adamc@62 2099 else
adamc@62 2100 ();
adamc@62 2101 (SS.add (cons, x), vals, sgns, strs))
adamc@191 2102 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 2103 let
adamc@156 2104 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 2105 (if SS.member (vals, x) then
adamc@156 2106 sgnError env (DuplicateVal (loc, x))
adamc@156 2107 else
adamc@156 2108 ();
adamc@156 2109 SS.add (vals, x)))
adamc@156 2110 vals xncs
adamc@156 2111 in
adamc@156 2112 if SS.member (cons, x) then
adamc@156 2113 sgnError env (DuplicateCon (loc, x))
adamc@156 2114 else
adamc@156 2115 ();
adamc@156 2116 (SS.add (cons, x), vals, sgns, strs)
adamc@156 2117 end
adamc@191 2118 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2119 (if SS.member (cons, x) then
adamc@156 2120 sgnError env (DuplicateCon (loc, x))
adamc@156 2121 else
adamc@156 2122 ();
adamc@156 2123 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2124 | L'.SgiVal (x, _, _) =>
adamc@62 2125 (if SS.member (vals, x) then
adamc@62 2126 sgnError env (DuplicateVal (loc, x))
adamc@62 2127 else
adamc@62 2128 ();
adamc@62 2129 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2130 | L'.SgiSgn (x, _, _) =>
adamc@62 2131 (if SS.member (sgns, x) then
adamc@62 2132 sgnError env (DuplicateSgn (loc, x))
adamc@62 2133 else
adamc@62 2134 ();
adamc@62 2135 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2136 | L'.SgiStr (x, _, _) =>
adamc@62 2137 (if SS.member (strs, x) then
adamc@62 2138 sgnError env (DuplicateStr (loc, x))
adamc@62 2139 else
adamc@62 2140 ();
adamc@88 2141 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2142 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2143 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2144 (if SS.member (cons, x) then
adamc@211 2145 sgnError env (DuplicateCon (loc, x))
adamc@211 2146 else
adamc@211 2147 ();
adamc@211 2148 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2149 | L'.SgiClass (x, _, _, _) =>
adamc@211 2150 (if SS.member (cons, x) then
adamc@211 2151 sgnError env (DuplicateCon (loc, x))
adamc@211 2152 else
adamc@211 2153 ();
adamc@460 2154 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2155 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2156 in
adamc@83 2157 ((L'.SgnConst sgis', loc), gs)
adamc@31 2158 end
adamc@31 2159 | L.SgnVar x =>
adamc@31 2160 (case E.lookupSgn env x of
adamc@31 2161 NONE =>
adamc@31 2162 (sgnError env (UnboundSgn (loc, x));
adamc@83 2163 ((L'.SgnError, loc), []))
adamc@83 2164 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2165 | L.SgnFun (m, dom, ran) =>
adamc@41 2166 let
adamc@83 2167 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2168 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2169 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2170 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2171 in
adamc@83 2172 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2173 end
adamc@42 2174 | L.SgnWhere (sgn, x, c) =>
adamc@42 2175 let
adamc@83 2176 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2177 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2178 in
adamc@42 2179 case #1 (hnormSgn env sgn') of
adamc@83 2180 L'.SgnError => (sgnerror, [])
adamc@42 2181 | L'.SgnConst sgis =>
adamc@75 2182 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2183 x' = x andalso
adamc@623 2184 (unifyKinds env k ck
adamc@75 2185 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2186 true)
adamc@42 2187 | _ => false) sgis then
adamc@83 2188 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2189 else
adamc@42 2190 (sgnError env (UnWhereable (sgn', x));
adamc@83 2191 (sgnerror, []))
adamc@42 2192 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2193 (sgnerror, []))
adamc@42 2194 end
adamc@59 2195 | L.SgnProj (m, ms, x) =>
adamc@59 2196 (case E.lookupStr env m of
adamc@59 2197 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2198 (sgnerror, []))
adamc@59 2199 | SOME (n, sgn) =>
adamc@59 2200 let
adamc@59 2201 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2202 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2203 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2204 (strerror, sgnerror))
adamc@59 2205 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2206 ((L'.StrVar n, loc), sgn) ms
adamc@59 2207 in
adamc@59 2208 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2209 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2210 (sgnerror, []))
adamc@83 2211 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2212 end)
adamc@59 2213
adamc@31 2214
adamc@66 2215 fun selfify env {str, strs, sgn} =
adamc@66 2216 case #1 (hnormSgn env sgn) of
adamc@66 2217 L'.SgnError => sgn
adamc@66 2218 | L'.SgnVar _ => sgn
adamc@66 2219
adamc@66 2220 | L'.SgnConst sgis =>
adamc@66 2221 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2222 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2223 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2224 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@563 2225 | (L'.SgiClassAbs (x, n, k), loc) =>
adamc@563 2226 (L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@66 2227 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2228 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2229 | x => x) sgis), #2 sgn)
adamc@66 2230 | L'.SgnFun _ => sgn
adamc@66 2231 | L'.SgnWhere _ => sgn
adamc@66 2232 | L'.SgnProj (m, ms, x) =>
adamc@66 2233 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2234 (L'.StrVar m, #2 sgn) ms,
adamc@66 2235 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2236 field = x} of
adamc@66 2237 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2238 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2239
adamc@66 2240 fun selfifyAt env {str, sgn} =
adamc@66 2241 let
adamc@66 2242 fun self (str, _) =
adamc@66 2243 case str of
adamc@66 2244 L'.StrVar x => SOME (x, [])
adamc@66 2245 | L'.StrProj (str, x) =>
adamc@66 2246 (case self str of
adamc@66 2247 NONE => NONE
adamc@66 2248 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2249 | _ => NONE
adamc@66 2250 in
adamc@66 2251 case self str of
adamc@66 2252 NONE => sgn
adamc@66 2253 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2254 end
adamc@66 2255
adamc@628 2256 fun dopen env {str, strs, sgn} =
adamc@66 2257 let
adamc@66 2258 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2259 (L'.StrVar str, #2 sgn) strs
adamc@66 2260 in
adamc@66 2261 case #1 (hnormSgn env sgn) of
adamc@66 2262 L'.SgnConst sgis =>
adamc@628 2263 ListUtil.foldlMap (fn ((sgi, loc), env') =>
adamc@162 2264 let
adamc@162 2265 val d =
adamc@162 2266 case sgi of
adamc@162 2267 L'.SgiConAbs (x, n, k) =>
adamc@162 2268 let
adamc@162 2269 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2270 in
adamc@162 2271 (L'.DCon (x, n, k, c), loc)
adamc@162 2272 end
adamc@162 2273 | L'.SgiCon (x, n, k, c) =>
adamc@162 2274 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2275 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2276 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2277 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2278 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2279 | L'.SgiVal (x, n, t) =>
adamc@162 2280 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2281 | L'.SgiStr (x, n, sgn) =>
adamc@162 2282 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2283 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2284 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2285 | L'.SgiConstraint (c1, c2) =>
adamc@162 2286 (L'.DConstraint (c1, c2), loc)
adamc@563 2287 | L'.SgiClassAbs (x, n, k) =>
adamc@211 2288 let
adamc@563 2289 val k' = (L'.KArrow (k, (L'.KType, loc)), loc)
adamc@211 2290 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2291 in
adamc@563 2292 (L'.DCon (x, n, k', c), loc)
adamc@211 2293 end
adamc@563 2294 | L'.SgiClass (x, n, k, _) =>
adamc@211 2295 let
adamc@563 2296 val k' = (L'.KArrow (k, (L'.KType, loc)), loc)
adamc@211 2297 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2298 in
adamc@563 2299 (L'.DCon (x, n, k', c), loc)
adamc@211 2300 end
adamc@162 2301 in
adamc@628 2302 (d, E.declBinds env' d)
adamc@162 2303 end)
adamc@628 2304 env sgis
adamc@66 2305 | _ => (strError env (UnOpenable sgn);
adamc@628 2306 ([], env))
adamc@66 2307 end
adamc@66 2308
adamc@31 2309 fun sgiOfDecl (d, loc) =
adamc@31 2310 case d of
adamc@123 2311 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2312 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2313 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2314 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2315 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2316 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2317 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2318 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2319 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2320 | L'.DExport _ => []
adamc@460 2321 | L'.DTable (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (tableOf (), c), loc)), loc)]
adamc@460 2322 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@563 2323 | L'.DClass (x, n, k, c) => [(L'.SgiClass (x, n, k, c), loc)]
adamc@271 2324 | L'.DDatabase _ => []
adamc@460 2325 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@88 2326
adamc@628 2327 fun subSgn env sgn1 (sgn2 as (_, loc2)) =
adamc@469 2328 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 2329 ("sgn2", p_sgn env sgn2)];*)
adamc@35 2330 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2331 (L'.SgnError, _) => ()
adamc@31 2332 | (_, L'.SgnError) => ()
adamc@31 2333
adamc@31 2334 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2335 let
adamc@362 2336 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 2337 ("sgn2", p_sgn env sgn2),
adamc@362 2338 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 2339 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 2340
adamc@628 2341 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 2342 let
adamc@362 2343 (*val () = prefaces "folder" [("sgis1", p_sgn env (L'.SgnConst sgis1, loc2))]*)
adamc@362 2344
adamc@31 2345 fun seek p =
adamc@31 2346 let
adamc@628 2347 fun seek env ls =
adamc@31 2348 case ls of
adamc@31 2349 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@628 2350 env)
adamc@31 2351 | h :: t =>
adamc@469 2352 case p (env, h) of
adamc@469 2353 NONE =>
adamc@469 2354 let
adamc@469 2355 val env = case #1 h of
adamc@469 2356 L'.SgiCon (x, n, k, c) =>
adamc@471 2357 if E.checkENamed env n then
adamc@471 2358 env
adamc@471 2359 else
adamc@471 2360 E.pushCNamedAs env x n k (SOME c)
adamc@469 2361 | L'.SgiConAbs (x, n, k) =>
adamc@471 2362 if E.checkENamed env n then
adamc@471 2363 env
adamc@471 2364 else
adamc@471 2365 E.pushCNamedAs env x n k NONE
adamc@469 2366 | _ => env
adamc@469 2367 in
adamc@628 2368 seek (E.sgiBinds env h) t
adamc@469 2369 end
adamc@88 2370 | SOME envs => envs
adamc@31 2371 in
adamc@628 2372 seek env sgis1
adamc@31 2373 end
adamc@31 2374 in
adamc@31 2375 case sgi of
adamc@31 2376 L'.SgiConAbs (x, n2, k2) =>
adamc@469 2377 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@31 2378 let
adamc@41 2379 fun found (x', n1, k1, co1) =
adamc@41 2380 if x = x' then
adamc@41 2381 let
adamc@623 2382 val () = unifyKinds env k1 k2
adamc@41 2383 handle KUnify (k1, k2, err) =>
adamc@41 2384 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2385 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2386 in
adamc@41 2387 SOME (if n1 = n2 then
adamc@41 2388 env
adamc@41 2389 else
adamc@628 2390 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)))
adamc@41 2391 end
adamc@41 2392 else
adamc@41 2393 NONE
adamc@31 2394 in
adamc@31 2395 case sgi1 of
adamc@41 2396 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2397 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2398 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2399 let
adamc@191 2400 val k = (L'.KType, loc)
adamc@191 2401 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2402 in
adamc@191 2403 found (x', n1, k', NONE)
adamc@191 2404 end
adamc@191 2405 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2406 let
adamc@191 2407 val k = (L'.KType, loc)
adamc@191 2408 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2409 in
adamc@191 2410 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2411 end
adamc@563 2412 | L'.SgiClassAbs (x', n1, k) => found (x', n1,
adamc@563 2413 (L'.KArrow (k,
adamc@563 2414 (L'.KType, loc)), loc),
adamc@563 2415 NONE)
adamc@563 2416 | L'.SgiClass (x', n1, k, c) => found (x', n1,
adamc@563 2417 (L'.KArrow (k,
adamc@563 2418 (L'.KType, loc)), loc),
adamc@563 2419 SOME c)
adamc@31 2420 | _ => NONE
adamc@31 2421 end)
adamc@31 2422
adamc@31 2423 | L'.SgiCon (x, n2, k2, c2) =>
adamc@469 2424 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2425 let
adamc@211 2426 fun found (x', n1, k1, c1) =
adamc@211 2427 if x = x' then
adamc@211 2428 let
adamc@327 2429 fun good () =
adamc@327 2430 let
adamc@327 2431 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 2432 val env = if n1 = n2 then
adamc@327 2433 env
adamc@327 2434 else
adamc@327 2435 E.pushCNamedAs env x n1 k1 (SOME c1)
adamc@327 2436 in
adamc@628 2437 SOME env
adamc@327 2438 end
adamc@211 2439 in
adamc@628 2440 (unifyCons env c1 c2;
adamc@628 2441 good ())
adamc@211 2442 handle CUnify (c1, c2, err) =>
adamc@211 2443 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2444 good ())
adamc@211 2445 end
adamc@211 2446 else
adamc@211 2447 NONE
adamc@211 2448 in
adamc@211 2449 case sgi1 of
adamc@211 2450 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@563 2451 | L'.SgiClass (x', n1, k1, c1) =>
adamc@563 2452 found (x', n1, (L'.KArrow (k1, (L'.KType, loc)), loc), c1)
adamc@211 2453 | _ => NONE
adamc@211 2454 end)
adamc@31 2455
adamc@191 2456 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@469 2457 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@160 2458 let
adamc@191 2459 fun found (n1, xs1, xncs1) =
adamc@160 2460 let
adamc@160 2461 fun mismatched ue =
adamc@160 2462 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@628 2463 SOME env)
adamc@156 2464
adamc@191 2465 val k = (L'.KType, loc)
adamc@191 2466 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2467
adamc@160 2468 fun good () =
adamc@160 2469 let
adamc@471 2470 val env = E.sgiBinds env sgi1All
adamc@160 2471 val env = if n1 = n2 then
adamc@160 2472 env
adamc@160 2473 else
adamc@471 2474 E.pushCNamedAs env x n2 k'
adamc@471 2475 (SOME (L'.CNamed n1, loc))
adamc@160 2476 in
adamc@628 2477 SOME env
adamc@160 2478 end
adamc@156 2479
adamc@397 2480 val env = E.pushCNamedAs env x n1 k' NONE
adamc@397 2481 val env = if n1 = n2 then
adamc@397 2482 env
adamc@397 2483 else
adamc@397 2484 E.pushCNamedAs env x n2 k' (SOME (L'.CNamed n1, loc))
adamc@191 2485 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2486 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2487 String.compare (x1, x2) <> EQUAL
adamc@160 2488 orelse case (t1, t2) of
adamc@160 2489 (NONE, NONE) => false
adamc@160 2490 | (SOME t1, SOME t2) =>
adamc@628 2491 (unifyCons env t1 t2; false)
adamc@160 2492 | _ => true
adamc@160 2493 in
adamc@191 2494 (if xs1 <> xs2
adamc@191 2495 orelse length xncs1 <> length xncs2
adamc@160 2496 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2497 mismatched NONE
adamc@160 2498 else
adamc@160 2499 good ())
adamc@160 2500 handle CUnify ue => mismatched (SOME ue)
adamc@160 2501 end
adamc@160 2502 in
adamc@160 2503 case sgi1 of
adamc@191 2504 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2505 if x' = x then
adamc@191 2506 found (n1, xs, xncs1)
adamc@160 2507 else
adamc@160 2508 NONE
adamc@191 2509 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2510 if x' = x then
adamc@191 2511 found (n1, xs, xncs1)
adamc@162 2512 else
adamc@162 2513 NONE
adamc@160 2514 | _ => NONE
adamc@160 2515 end)
adamc@156 2516
adamc@191 2517 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@469 2518 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@158 2519 case sgi1 of
adamc@191 2520 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2521 if x = x' then
adamc@158 2522 let
adamc@158 2523 val k = (L'.KType, loc)
adamc@191 2524 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2525 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2526 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2527
adamc@158 2528 fun good () =
adamc@158 2529 let
adamc@191 2530 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2531 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2532 in
adamc@628 2533 SOME env
adamc@158 2534 end
adamc@158 2535 in
adamc@628 2536 (unifyCons env t1 t2;
adamc@628 2537 good ())
adamc@158 2538 handle CUnify (c1, c2, err) =>
adamc@158 2539 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2540 good ())
adamc@158 2541 end
adamc@158 2542 else
adamc@158 2543 NONE
adamc@158 2544
adamc@158 2545 | _ => NONE)
adamc@156 2546
adamc@32 2547 | L'.SgiVal (x, n2, c2) =>
adamc@469 2548 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@32 2549 case sgi1 of
adamc@41 2550 L'.SgiVal (x', n1, c1) =>
adamc@41 2551 if x = x' then
adamc@628 2552 (unifyCons env c1 c2;
adamc@628 2553 SOME env)
adamc@86 2554 handle CUnify (c1, c2, err) =>
adamc@86 2555 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@628 2556 SOME env)
adamc@41 2557 else
adamc@41 2558 NONE
adamc@32 2559 | _ => NONE)
adamc@32 2560
adamc@33 2561 | L'.SgiStr (x, n2, sgn2) =>
adamc@469 2562 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@33 2563 case sgi1 of
adamc@41 2564 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2565 if x = x' then
adamc@66 2566 let
adamc@628 2567 val () = subSgn env sgn1 sgn2
adamc@66 2568 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2569 val env = if n1 = n2 then
adamc@66 2570 env
adamc@66 2571 else
adamc@66 2572 E.pushStrNamedAs env x n2
adamc@66 2573 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2574 sgn = sgn2})
adamc@66 2575 in
adamc@628 2576 SOME env
adamc@66 2577 end
adamc@41 2578 else
adamc@41 2579 NONE
adamc@33 2580 | _ => NONE)
adamc@59 2581
adamc@59 2582 | L'.SgiSgn (x, n2, sgn2) =>
adamc@469 2583 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@59 2584 case sgi1 of
adamc@59 2585 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2586 if x = x' then
adamc@65 2587 let
adamc@628 2588 val () = subSgn env sgn1 sgn2
adamc@628 2589 val () = subSgn env sgn2 sgn1
adamc@65 2590
adamc@65 2591 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2592 val env = if n1 = n2 then
adamc@65 2593 env
adamc@65 2594 else
adamc@65 2595 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2596 in
adamc@628 2597 SOME env
adamc@65 2598 end
adamc@59 2599 else
adamc@59 2600 NONE
adamc@59 2601 | _ => NONE)
adamc@88 2602
adamc@88 2603 | L'.SgiConstraint (c2, d2) =>
adamc@469 2604 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@88 2605 case sgi1 of
adamc@88 2606 L'.SgiConstraint (c1, d1) =>
adamc@628 2607 if consEq env (c1, c2) andalso consEq env (d1, d2) then
adamc@628 2608 SOME env
adamc@88 2609 else
adamc@88 2610 NONE
adamc@88 2611 | _ => NONE)
adamc@203 2612
adamc@563 2613 | L'.SgiClassAbs (x, n2, k2) =>
adamc@469 2614 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2615 let
adamc@563 2616 fun found (x', n1, k1, co) =
adamc@211 2617 if x = x' then
adamc@211 2618 let
adamc@623 2619 val () = unifyKinds env k1 k2
adamc@563 2620 handle KUnify (k1, k2, err) =>
adamc@563 2621 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@563 2622
adamc@563 2623 val k = (L'.KArrow (k1, (L'.KType, loc)), loc)
adamc@211 2624 val env = E.pushCNamedAs env x n1 k co
adamc@211 2625 in
adamc@211 2626 SOME (if n1 = n2 then
adamc@211 2627 env
adamc@211 2628 else
adamc@628 2629 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)))
adamc@211 2630 end
adamc@211 2631 else
adamc@211 2632 NONE
adamc@211 2633 in
adamc@211 2634 case sgi1 of
adamc@563 2635 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 2636 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 2637 | _ => NONE
adamc@211 2638 end)
adamc@563 2639 | L'.SgiClass (x, n2, k2, c2) =>
adamc@469 2640 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@211 2641 let
adamc@563 2642 val k = (L'.KArrow (k2, (L'.KType, loc)), loc)
adamc@563 2643
adamc@563 2644 fun found (x', n1, k1, c1) =
adamc@211 2645 if x = x' then
adamc@211 2646 let
adamc@623 2647 val () = unifyKinds env k1 k2
adamc@563 2648 handle KUnify (k1, k2, err) =>
adamc@563 2649 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@563 2650
adamc@218 2651 fun good () =
adamc@218 2652 let
adamc@218 2653 val env = E.pushCNamedAs env x n2 k (SOME c2)
adamc@218 2654 val env = if n1 = n2 then
adamc@218 2655 env
adamc@218 2656 else
adamc@218 2657 E.pushCNamedAs env x n1 k (SOME c1)
adamc@218 2658 in
adamc@628 2659 SOME env
adamc@218 2660 end
adamc@211 2661 in
adamc@628 2662 (unifyCons env c1 c2;
adamc@628 2663 good ())
adamc@211 2664 handle CUnify (c1, c2, err) =>
adamc@211 2665 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2666 good ())
adamc@211 2667 end
adamc@211 2668 else
adamc@211 2669 NONE
adamc@211 2670 in
adamc@211 2671 case sgi1 of
adamc@563 2672 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2673 | _ => NONE
adamc@211 2674 end)
adamc@31 2675 end
adamc@31 2676 in
adamc@628 2677 ignore (foldl folder env sgis2)
adamc@31 2678 end
adamc@31 2679
adamc@41 2680 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2681 let
adamc@480 2682 val ran2 =
adamc@43 2683 if n1 = n2 then
adamc@480 2684 ran2
adamc@43 2685 else
adamc@480 2686 subStrInSgn (n2, n1) ran2
adamc@43 2687 in
adamc@628 2688 subSgn env dom2 dom1;
adamc@628 2689 subSgn (E.pushStrNamedAs env m1 n1 dom2) ran1 ran2
adamc@43 2690 end
adamc@41 2691
adamc@469 2692 | _ => sgnError env (SgnWrongForm (sgn1, sgn2)))
adamc@41 2693
adamc@61 2694
adamc@312 2695 fun positive self =
adamc@312 2696 let
adamc@312 2697 open L
adamc@312 2698
adamc@312 2699 fun none (c, _) =
adamc@312 2700 case c of
adamc@312 2701 CAnnot (c, _) => none c
adamc@312 2702
adamc@312 2703 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 2704 | TCFun (_, _, _, c) => none c
adamc@312 2705 | TRecord c => none c
adamc@312 2706
adamc@312 2707 | CVar ([], x) => x <> self
adamc@312 2708 | CVar _ => true
adamc@312 2709 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 2710 | CAbs _ => false
adamc@628 2711 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2712
adamc@623 2713 | CKAbs _ => false
adamc@623 2714 | TKFun _ => false
adamc@623 2715
adamc@312 2716 | CName _ => true
adamc@312 2717
adamc@312 2718 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 2719 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 2720 | CMap => true
adamc@312 2721
adamc@312 2722 | CUnit => true
adamc@312 2723
adamc@312 2724 | CTuple cs => List.all none cs
adamc@312 2725 | CProj (c, _) => none c
adamc@312 2726
adamc@312 2727 | CWild _ => false
adamc@312 2728
adamc@312 2729 fun pos (c, _) =
adamc@312 2730 case c of
adamc@312 2731 CAnnot (c, _) => pos c
adamc@312 2732
adamc@312 2733 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 2734 | TCFun (_, _, _, c) => pos c
adamc@312 2735 | TRecord c => pos c
adamc@312 2736
adamc@312 2737 | CVar _ => true
adamc@312 2738 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 2739 | CAbs _ => false
adamc@628 2740 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 2741
adamc@623 2742 | CKAbs _ => false
adamc@623 2743 | TKFun _ => false
adamc@623 2744
adamc@312 2745 | CName _ => true
adamc@312 2746
adamc@312 2747 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 2748 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 2749 | CMap => true
adamc@312 2750
adamc@312 2751 | CUnit => true
adamc@312 2752
adamc@312 2753 | CTuple cs => List.all pos cs
adamc@312 2754 | CProj (c, _) => pos c
adamc@312 2755
adamc@312 2756 | CWild _ => false
adamc@312 2757 in
adamc@312 2758 pos
adamc@312 2759 end
adamc@312 2760
adamc@325 2761 fun wildifyStr env (str, sgn) =
adamc@325 2762 case #1 (hnormSgn env sgn) of
adamc@325 2763 L'.SgnConst sgis =>
adamc@325 2764 (case #1 str of
adamc@325 2765 L.StrConst ds =>
adamc@325 2766 let
adamc@493 2767 fun decompileKind (k, loc) =
adamc@493 2768 case k of
adamc@493 2769 L'.KType => SOME (L.KType, loc)
adamc@493 2770 | L'.KArrow (k1, k2) =>
adamc@493 2771 (case (decompileKind k1, decompileKind k2) of
adamc@493 2772 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 2773 | _ => NONE)
adamc@493 2774 | L'.KName => SOME (L.KName, loc)
adamc@493 2775 | L'.KRecord k =>
adamc@493 2776 (case decompileKind k of
adamc@493 2777 SOME k => SOME (L.KRecord k, loc)
adamc@493 2778 | _ => NONE)
adamc@493 2779 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 2780 | L'.KTuple ks =>
adamc@493 2781 let
adamc@493 2782 val ks' = List.mapPartial decompileKind ks
adamc@493 2783 in
adamc@493 2784 if length ks' = length ks then
adamc@493 2785 SOME (L.KTuple ks', loc)
adamc@493 2786 else
adamc@493 2787 NONE
adamc@493 2788 end
adamc@493 2789
adamc@493 2790 | L'.KError => NONE
adamc@493 2791 | L'.KUnif (_, _, ref (SOME k)) => decompileKind k
adamc@493 2792 | L'.KUnif _ => NONE
adamc@493 2793
adamc@623 2794 | L'.KRel _ => NONE
adamc@623 2795 | L'.KFun _ => NONE
adamc@623 2796
adamc@325 2797 fun decompileCon env (c, loc) =
adamc@325 2798 case c of
adamc@325 2799 L'.CRel i =>
adamc@325 2800 let
adamc@325 2801 val (s, _) = E.lookupCRel env i
adamc@325 2802 in
adamc@325 2803 SOME (L.CVar ([], s), loc)
adamc@325 2804 end
adamc@325 2805 | L'.CNamed i =>
adamc@325 2806 let
adamc@325 2807 val (s, _, _) = E.lookupCNamed env i
adamc@325 2808 in
adamc@325 2809 SOME (L.CVar ([], s), loc)
adamc@325 2810 end
adamc@325 2811 | L'.CModProj (m1, ms, x) =>
adamc@325 2812 let
adamc@325 2813 val (s, _) = E.lookupStrNamed env m1
adamc@325 2814 in
adamc@325 2815 SOME (L.CVar (s :: ms, x), loc)
adamc@325 2816 end
adamc@325 2817 | L'.CName s => SOME (L.CName s, loc)
adamc@325 2818 | L'.CRecord (_, xcs) =>
adamc@325 2819 let
adamc@325 2820 fun fields xcs =
adamc@325 2821 case xcs of
adamc@325 2822 [] => SOME []
adamc@325 2823 | (x, t) :: xcs =>
adamc@325 2824 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 2825 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 2826 | _ => NONE
adamc@325 2827 in
adamc@325 2828 Option.map (fn xcs => (L.CRecord xcs, loc))
adamc@325 2829 (fields xcs)
adamc@325 2830 end
adamc@325 2831 | L'.CConcat (c1, c2) =>
adamc@325 2832 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 2833 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 2834 | _ => NONE)
adamc@325 2835 | L'.CUnit => SOME (L.CUnit, loc)
adamc@325 2836
adamc@325 2837 | _ => NONE
adamc@325 2838
adamc@469 2839 val (neededC, constraints, neededV, _) =
adamc@469 2840 foldl (fn ((sgi, loc), (neededC, constraints, neededV, env')) =>
adamc@325 2841 let
adamc@469 2842 val (needed, constraints, neededV) =
adamc@325 2843 case sgi of
adamc@493 2844 L'.SgiConAbs (x, _, k) => (SM.insert (neededC, x, k), constraints, neededV)
adamc@469 2845 | L'.SgiConstraint cs => (neededC, (env', cs, loc) :: constraints, neededV)
adamc@469 2846
adamc@469 2847 | L'.SgiVal (x, _, t) =>
adamc@469 2848 let
adamc@469 2849 fun default () = (neededC, constraints, neededV)
adamc@469 2850
adamc@469 2851 val t = normClassConstraint env' t
adamc@469 2852 in
adamc@469 2853 case #1 t of
adamc@469 2854 L'.CApp (f, _) =>
adamc@634 2855 if isClassOrFolder env' f then
adamc@469 2856 (neededC, constraints, SS.add (neededV, x))
adamc@469 2857 else
adamc@469 2858 default ()
adamc@469 2859 | _ => default ()
adamc@469 2860 end
adamc@469 2861
adamc@469 2862 | _ => (neededC, constraints, neededV)
adamc@325 2863 in
adamc@469 2864 (needed, constraints, neededV, E.sgiBinds env' (sgi, loc))
adamc@325 2865 end)
adamc@493 2866 (SM.empty, [], SS.empty, env) sgis
adamc@325 2867
adamc@634 2868 val (neededC, neededV) =
adamc@634 2869 foldl (fn ((d, _), needed as (neededC, neededV)) =>
adamc@634 2870 case d of
adamc@634 2871 L.DCon (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 2872 handle NotFound =>
adamc@634 2873 needed)
adamc@634 2874 | L.DClass (x, _, _) => ((#1 (SM.remove (neededC, x)), neededV)
adamc@634 2875 handle NotFound => needed)
adamc@634 2876 | L.DVal (x, _, _) => ((neededC, SS.delete (neededV, x))
adamc@634 2877 handle NotFound => needed)
adamc@634 2878 | L.DOpen _ => (SM.empty, SS.empty)
adamc@634 2879 | _ => needed)
adamc@634 2880 (neededC, neededV) ds
adamc@469 2881
adamc@469 2882 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@325 2883 case (decompileCon env' c1, decompileCon env' c2) of
adamc@325 2884 (SOME c1, SOME c2) =>
adamc@325 2885 SOME (L.DConstraint (c1, c2), loc)
adamc@325 2886 | _ => NONE) constraints
adamc@469 2887
adamc@469 2888 val ds' =
adamc@469 2889 case SS.listItems neededV of
adamc@469 2890 [] => ds'
adamc@469 2891 | xs =>
adamc@469 2892 let
adamc@469 2893 val ewild = (L.EWild, #2 str)
adamc@469 2894 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@469 2895 in
adamc@469 2896 ds'' @ ds'
adamc@469 2897 end
adamc@469 2898
adamc@469 2899 val ds' =
adamc@493 2900 case SM.listItemsi neededC of
adamc@469 2901 [] => ds'
adamc@469 2902 | xs =>
adamc@469 2903 let
adamc@493 2904 val ds'' = map (fn (x, k) =>
adamc@493 2905 let
adamc@493 2906 val k =
adamc@493 2907 case decompileKind k of
adamc@493 2908 NONE => (L.KWild, #2 str)
adamc@493 2909 | SOME k => k
adamc@493 2910 val cwild = (L.CWild k, #2 str)
adamc@493 2911 in
adamc@493 2912 (L.DCon (x, NONE, cwild), #2 str)
adamc@493 2913 end) xs
adamc@469 2914 in
adamc@469 2915 ds'' @ ds'
adamc@469 2916 end
adamc@325 2917 in
adamc@469 2918 (L.StrConst (ds @ ds'), #2 str)
adamc@325 2919 end
adamc@325 2920 | _ => str)
adamc@325 2921 | _ => str
adamc@325 2922
adamc@628 2923 fun elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 2924 let
adamc@255 2925 (*val () = preface ("elabDecl", SourcePrint.p_decl (d, loc))*)
adamc@514 2926 (*val befor = Time.now ()*)
adamc@255 2927
adamc@255 2928 val r =
adamc@255 2929 case d of
adamc@255 2930 L.DCon (x, ko, c) =>
adamc@255 2931 let
adamc@255 2932 val k' = case ko of
adamc@255 2933 NONE => kunif loc
adamc@623 2934 | SOME k => elabKind env k
adamc@255 2935
adamc@255 2936 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 2937 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 2938 in
adamc@255 2939 checkKind env c' ck k';
adamc@255 2940
adamc@255 2941 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 2942 end
adamc@255 2943 | L.DDatatype (x, xs, xcs) =>
adamc@255 2944 let
adamc@312 2945 val positive = List.all (fn (_, to) =>
adamc@312 2946 case to of
adamc@312 2947 NONE => true
adamc@312 2948 | SOME t => positive x t) xcs
adamc@312 2949
adamc@255 2950 val k = (L'.KType, loc)
adamc@255 2951 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 2952 val (env, n) = E.pushCNamed env x k' NONE
adamc@255 2953 val t = (L'.CNamed n, loc)
adamc@255 2954 val nxs = length xs - 1
adamc@255 2955 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@255 2956
adamc@255 2957 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@255 2958 (E.pushCRel env' x k,
adamc@255 2959 D.enter denv')) (env, denv) xs
adamc@255 2960
adamc@255 2961 val (xcs, (used, env, gs')) =
adamc@255 2962 ListUtil.foldlMap
adamc@255 2963 (fn ((x, to), (used, env, gs)) =>
adamc@255 2964 let
adamc@255 2965 val (to, t, gs') = case to of
adamc@255 2966 NONE => (NONE, t, gs)
adamc@255 2967 | SOME t' =>
adamc@255 2968 let
adamc@255 2969 val (t', tk, gs') = elabCon (env', denv') t'
adamc@255 2970 in
adamc@255 2971 checkKind env' t' tk k;
adamc@255 2972 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@255 2973 end
adamc@255 2974 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@255 2975
adamc@255 2976 val (env, n') = E.pushENamed env x t
adamc@255 2977 in
adamc@255 2978 if SS.member (used, x) then
adamc@255 2979 strError env (DuplicateConstructor (x, loc))
adamc@255 2980 else
adamc@255 2981 ();
adamc@255 2982 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@255 2983 end)
adamc@255 2984 (SS.empty, env, []) xcs
adamc@255 2985
adamc@255 2986 val env = E.pushDatatype env n xs xcs
adamc@312 2987 val d' = (L'.DDatatype (x, n, xs, xcs), loc)
adamc@255 2988 in
adamc@601 2989 (*if positive then
adamc@312 2990 ()
adamc@312 2991 else
adamc@601 2992 declError env (Nonpositive d');*)
adamc@312 2993
adamc@312 2994 ([d'], (env, denv, gs' @ gs))
adamc@255 2995 end
adamc@255 2996
adamc@255 2997 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 2998
adamc@255 2999 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3000 (case E.lookupStr env m1 of
adamc@255 3001 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3002 ([], (env, denv, gs)))
adamc@255 3003 | SOME (n, sgn) =>
adamc@255 3004 let
adamc@255 3005 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3006 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3007 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3008 (strerror, sgnerror))
adamc@255 3009 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3010 ((L'.StrVar n, loc), sgn) ms
adamc@255 3011 in
adamc@628 3012 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3013 (L'.CModProj (n, ms, s), _) =>
adamc@255 3014 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3015 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3016 ([], (env, denv, gs)))
adamc@255 3017 | SOME (xs, xncs) =>
adamc@255 3018 let
adamc@255 3019 val k = (L'.KType, loc)
adamc@255 3020 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3021 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3022 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3023 val env = E.pushDatatype env n' xs xncs
adamc@255 3024
adamc@255 3025 val t = (L'.CNamed n', loc)
adamc@255 3026 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3027 let
adamc@255 3028 val t = case to of
adamc@255 3029 NONE => t
adamc@255 3030 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3031
adamc@255 3032 val t = foldr (fn (x, t) =>
adamc@255 3033 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3034 t xs
adamc@255 3035 in
adamc@255 3036 E.pushENamedAs env x n t
adamc@255 3037 end) env xncs
adamc@255 3038 in
adamc@628 3039 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3040 end)
adamc@255 3041 | _ => (strError env (NotDatatype loc);
adamc@255 3042 ([], (env, denv, [])))
adamc@255 3043 end)
adamc@255 3044
adamc@255 3045 | L.DVal (x, co, e) =>
adamc@255 3046 let
adamc@255 3047 val (c', _, gs1) = case co of
adamc@255 3048 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3049 | SOME c => elabCon (env, denv) c
adamc@255 3050
adamc@255 3051 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3052
adamc@629 3053 val () = checkCon env e' et c'
adamc@629 3054
adamc@467 3055 val c = normClassConstraint env c'
adamc@255 3056 val (env', n) = E.pushENamed env x c'
adamc@255 3057 in
adamc@255 3058 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3059 ("c'", p_con env c')];*)
adamc@628 3060 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3061 end
adamc@255 3062 | L.DValRec vis =>
adamc@255 3063 let
adamc@255 3064 fun allowable (e, _) =
adamc@255 3065 case e of
adamc@255 3066 L.EAbs _ => true
adamc@255 3067 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3068 | L.EKAbs (_, e) => allowable e
adamc@255 3069 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3070 | _ => false
adamc@255 3071
adamc@255 3072 val (vis, gs) = ListUtil.foldlMap
adamc@255 3073 (fn ((x, co, e), gs) =>
adamc@255 3074 let
adamc@255 3075 val (c', _, gs1) = case co of
adamc@255 3076 NONE => (cunif (loc, ktype), ktype, [])
adamc@255 3077 | SOME c => elabCon (env, denv) c
adamc@255 3078 in
adamc@255 3079 ((x, c', e), enD gs1 @ gs)
adamc@280 3080 end) gs vis
adamc@255 3081
adamc@255 3082 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3083 let
adamc@255 3084 val (env, n) = E.pushENamed env x c'
adamc@255 3085 in
adamc@255 3086 ((x, n, c', e), env)
adamc@255 3087 end) env vis
adamc@255 3088
adamc@255 3089 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3090 let
adamc@255 3091 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3092 in
adamc@628 3093 checkCon env e' et c';
adamc@255 3094 if allowable e then
adamc@255 3095 ()
adamc@255 3096 else
adamc@255 3097 expError env (IllegalRec (x, e'));
adamc@628 3098 ((x, n, c', e'), gs1 @ gs)
adamc@255 3099 end) gs vis
adamc@255 3100 in
adamc@255 3101 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@255 3102 end
adamc@255 3103
adamc@255 3104 | L.DSgn (x, sgn) =>
adamc@255 3105 let
adamc@255 3106 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3107 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 3108 in
adamc@255 3109 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3110 end
adamc@255 3111
adamc@255 3112 | L.DStr (x, sgno, str) =>
adamc@255 3113 let
adamc@255 3114 val () = if x = "Basis" then
adamc@255 3115 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@255 3116 else
adamc@255 3117 ()
adamc@255 3118
adamc@255 3119 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@255 3120
adamc@255 3121 val (str', sgn', gs') =
adamc@255 3122 case formal of
adamc@255 3123 NONE =>
adamc@255 3124 let
adamc@255 3125 val (str', actual, gs') = elabStr (env, denv) str
adamc@255 3126 in
adamc@255 3127 (str', selfifyAt env {str = str', sgn = actual}, gs')
adamc@255 3128 end
adamc@255 3129 | SOME (formal, gs1) =>
adamc@255 3130 let
adamc@325 3131 val str = wildifyStr env (str, formal)
adamc@255 3132 val (str', actual, gs2) = elabStr (env, denv) str
adamc@255 3133 in
adamc@628 3134 subSgn env (selfifyAt env {str = str', sgn = actual}) formal;
adamc@255 3135 (str', formal, enD gs1 @ gs2)
adamc@255 3136 end
adamc@255 3137
adamc@255 3138 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3139 in
adamc@255 3140 case #1 (hnormSgn env sgn') of
adamc@255 3141 L'.SgnFun _ =>
adamc@255 3142 (case #1 str' of
adamc@255 3143 L'.StrFun _ => ()
adamc@255 3144 | _ => strError env (FunctorRebind loc))
adamc@255 3145 | _ => ();
adamc@255 3146
adamc@255 3147 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@255 3148 end
adamc@255 3149
adamc@255 3150 | L.DFfiStr (x, sgn) =>
adamc@255 3151 let
adamc@255 3152 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3153
adamc@255 3154 val (env', n) = E.pushStrNamed env x sgn'
adamc@255 3155 in
adamc@255 3156 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3157 end
adamc@255 3158
adamc@255 3159 | L.DOpen (m, ms) =>
adamc@255 3160 (case E.lookupStr env m of
adamc@255 3161 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3162 ([], (env, denv, gs)))
adamc@255 3163 | SOME (n, sgn) =>
adamc@255 3164 let
adamc@255 3165 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3166 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@255 3167 NONE => (strError env (UnboundStr (loc, m));
adamc@255 3168 (strerror, sgnerror))
adamc@255 3169 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3170 ((L'.StrVar n, loc), sgn) ms
adamc@255 3171
adamc@628 3172 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 3173 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 3174 in
adamc@255 3175 (ds, (env', denv', gs))
adamc@255 3176 end)
adamc@255 3177
adamc@255 3178 | L.DConstraint (c1, c2) =>
adamc@255 3179 let
adamc@255 3180 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 3181 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 3182 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 3183
adamc@628 3184 val denv' = D.assert env denv (c1', c2')
adamc@255 3185 in
adamc@255 3186 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@255 3187 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@255 3188
adamc@628 3189 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 3190 end
adamc@255 3191
adamc@255 3192 | L.DOpenConstraints (m, ms) =>
adamc@255 3193 let
adamc@255 3194 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 3195 in
adamc@255 3196 ([], (env, denv, gs))
adamc@255 3197 end
adamc@255 3198
adamc@255 3199 | L.DExport str =>
adamc@255 3200 let
adamc@255 3201 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 3202
adamc@255 3203 val sgn =
adamc@255 3204 case #1 (hnormSgn env sgn) of
adamc@255 3205 L'.SgnConst sgis =>
adamc@255 3206 let
adamc@255 3207 fun doOne (all as (sgi, _), env) =
adamc@255 3208 (case sgi of
adamc@255 3209 L'.SgiVal (x, n, t) =>
adamc@325 3210 let
adamc@325 3211 fun doPage (makeRes, ran) =
adamc@628 3212 case hnormCon env ran of
adamc@628 3213 (L'.CApp (tf, arg), _) =>
adamc@628 3214 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 3215 ((L'.CModProj (basis, [], "transaction"), _),
adamc@628 3216 (L'.CApp (tf, arg3), _)) =>
adamc@325 3217 (case (basis = !basis_r,
adamc@628 3218 hnormCon env tf, hnormCon env arg3) of
adamc@325 3219 (true,
adamc@628 3220 (L'.CApp (tf, arg2), _),
adamc@628 3221 ((L'.CRecord (_, []), _))) =>
adamc@628 3222 (case (hnormCon env tf) of
adamc@628 3223 (L'.CApp (tf, arg1), _) =>
adamc@628 3224 (case (hnormCon env tf,
adamc@628 3225 hnormCon env arg1,
adamc@628 3226 hnormCon env arg2) of
adamc@628 3227 (tf, arg1,
adamc@628 3228 (L'.CRecord (_, []), _)) =>
adamc@325 3229 let
adamc@325 3230 val t = (L'.CApp (tf, arg1), loc)
adamc@325 3231 val t = (L'.CApp (t, arg2), loc)
adamc@325 3232 val t = (L'.CApp (t, arg3), loc)
adamc@325 3233 val t = (L'.CApp (
adamc@325 3234 (L'.CModProj
adamc@325 3235 (basis, [], "transaction"), loc),
adamc@325 3236 t), loc)
adamc@325 3237 in
adamc@325 3238 (L'.SgiVal (x, n, makeRes t), loc)
adamc@325 3239 end
adamc@325 3240 | _ => all)
adamc@325 3241 | _ => all)
adamc@325 3242 | _ => all)
adamc@325 3243 | _ => all)
adamc@325 3244 | _ => all
adamc@325 3245 in
adamc@628 3246 case hnormCon env t of
adamc@628 3247 (L'.TFun (dom, ran), _) =>
adamc@628 3248 (case hnormCon env dom of
adamc@628 3249 (L'.TRecord domR, _) =>
adamc@325 3250 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 3251 loc),
adamc@325 3252 t), loc), ran)
adamc@325 3253 | _ => all)
adamc@325 3254 | _ => doPage (fn t => t, t)
adamc@325 3255 end
adamc@255 3256 | _ => all,
adamc@255 3257 E.sgiBinds env all)
adamc@255 3258 in
adamc@255 3259 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 3260 end
adamc@255 3261 | _ => sgn
adamc@255 3262 in
adamc@255 3263 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 3264 end
adamc@255 3265
adamc@255 3266 | L.DTable (x, c) =>
adamc@255 3267 let
adamc@255 3268 val (c', k, gs') = elabCon (env, denv) c
adamc@255 3269 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@255 3270 in
adamc@255 3271 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@255 3272 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3273 end
adamc@338 3274 | L.DSequence x =>
adamc@338 3275 let
adamc@338 3276 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 3277 in
adamc@338 3278 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 3279 end
adamc@255 3280
adamc@563 3281 | L.DClass (x, k, c) =>
adamc@255 3282 let
adamc@623 3283 val k = elabKind env k
adamc@563 3284 val k' = (L'.KArrow (k, (L'.KType, loc)), loc)
adamc@280 3285 val (c', ck, gs') = elabCon (env, denv) c
adamc@563 3286 val (env, n) = E.pushCNamed env x k' (SOME c')
adamc@255 3287 val env = E.pushClass env n
adamc@255 3288 in
adamc@563 3289 checkKind env c' ck k';
adamc@563 3290 ([(L'.DClass (x, n, k, c'), loc)], (env, denv, enD gs' @ gs))
adamc@255 3291 end
adamc@271 3292
adamc@280 3293 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 3294
adamc@459 3295 | L.DCookie (x, c) =>
adamc@459 3296 let
adamc@459 3297 val (c', k, gs') = elabCon (env, denv) c
adamc@459 3298 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 3299 in
adamc@459 3300 checkKind env c' k (L'.KType, loc);
adamc@459 3301 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 3302 end
adamc@459 3303
adamc@280 3304 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 3305 in
adamc@280 3306 (*prefaces "elabDecl" [("e", SourcePrint.p_decl dAll),
adamc@514 3307 ("t", PD.string (LargeReal.toString (Time.toReal
adamc@514 3308 (Time.- (Time.now (), befor)))))];*)
adamc@280 3309
adamc@255 3310 r
adamc@255 3311 end
adamc@211 3312
adamc@83 3313 and elabStr (env, denv) (str, loc) =
adamc@31 3314 case str of
adamc@31 3315 L.StrConst ds =>
adamc@31 3316 let
adamc@88 3317 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 3318 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 3319
adamc@63 3320 val (sgis, _, _, _, _) =
adamc@64 3321 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 3322 case sgi of
adamc@64 3323 L'.SgiConAbs (x, n, k) =>
adamc@64 3324 let
adamc@64 3325 val (cons, x) =
adamc@64 3326 if SS.member (cons, x) then
adamc@64 3327 (cons, "?" ^ x)
adamc@64 3328 else
adamc@64 3329 (SS.add (cons, x), x)
adamc@64 3330 in
adamc@64 3331 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3332 end
adamc@64 3333 | L'.SgiCon (x, n, k, c) =>
adamc@64 3334 let
adamc@64 3335 val (cons, x) =
adamc@64 3336 if SS.member (cons, x) then
adamc@64 3337 (cons, "?" ^ x)
adamc@64 3338 else
adamc@64 3339 (SS.add (cons, x), x)
adamc@64 3340 in
adamc@64 3341 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3342 end
adamc@191 3343 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 3344 let
adamc@156 3345 val (cons, x) =
adamc@156 3346 if SS.member (cons, x) then
adamc@156 3347 (cons, "?" ^ x)
adamc@156 3348 else
adamc@156 3349 (SS.add (cons, x), x)
adamc@156 3350
adamc@156 3351 val (xncs, vals) =
adamc@156 3352 ListUtil.foldlMap
adamc@156 3353 (fn ((x, n, t), vals) =>
adamc@156 3354 if SS.member (vals, x) then
adamc@156 3355 (("?" ^ x, n, t), vals)
adamc@156 3356 else
adamc@156 3357 ((x, n, t), SS.add (vals, x)))
adamc@156 3358 vals xncs
adamc@156 3359 in
adamc@191 3360 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3361 end
adamc@191 3362 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3363 let
adamc@156 3364 val (cons, x) =
adamc@156 3365 if SS.member (cons, x) then
adamc@156 3366 (cons, "?" ^ x)
adamc@156 3367 else
adamc@156 3368 (SS.add (cons, x), x)
adamc@156 3369 in
adamc@191 3370 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3371 end
adamc@64 3372 | L'.SgiVal (x, n, c) =>
adamc@64 3373 let
adamc@64 3374 val (vals, x) =
adamc@64 3375 if SS.member (vals, x) then
adamc@64 3376 (vals, "?" ^ x)
adamc@64 3377 else
adamc@64 3378 (SS.add (vals, x), x)
adamc@64 3379 in
adamc@64 3380 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3381 end
adamc@64 3382 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3383 let
adamc@64 3384 val (sgns, x) =
adamc@64 3385 if SS.member (sgns, x) then
adamc@64 3386 (sgns, "?" ^ x)
adamc@64 3387 else
adamc@64 3388 (SS.add (sgns, x), x)
adamc@64 3389 in
adamc@64 3390 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3391 end
adamc@64 3392
adamc@64 3393 | L'.SgiStr (x, n, sgn) =>
adamc@64 3394 let
adamc@64 3395 val (strs, x) =
adamc@64 3396 if SS.member (strs, x) then
adamc@64 3397 (strs, "?" ^ x)
adamc@64 3398 else
adamc@64 3399 (SS.add (strs, x), x)
adamc@64 3400 in
adamc@64 3401 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3402 end
adamc@203 3403 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 3404 | L'.SgiClassAbs (x, n, k) =>
adamc@211 3405 let
adamc@211 3406 val (cons, x) =
adamc@211 3407 if SS.member (cons, x) then
adamc@211 3408 (cons, "?" ^ x)
adamc@211 3409 else
adamc@211 3410 (SS.add (cons, x), x)
adamc@211 3411 in
adamc@563 3412 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3413 end
adamc@563 3414 | L'.SgiClass (x, n, k, c) =>
adamc@211 3415 let
adamc@211 3416 val (cons, x) =
adamc@211 3417 if SS.member (cons, x) then
adamc@211 3418 (cons, "?" ^ x)
adamc@211 3419 else
adamc@211 3420 (SS.add (cons, x), x)
adamc@211 3421 in
adamc@563 3422 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3423 end)
adamc@64 3424
adamc@63 3425 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3426 in
adamc@83 3427 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3428 end
adamc@31 3429 | L.StrVar x =>
adamc@31 3430 (case E.lookupStr env x of
adamc@31 3431 NONE =>
adamc@31 3432 (strError env (UnboundStr (loc, x));
adamc@83 3433 (strerror, sgnerror, []))
adamc@83 3434 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3435 | L.StrProj (str, x) =>
adamc@34 3436 let
adamc@83 3437 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3438 in
adamc@34 3439 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3440 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3441 (strerror, sgnerror, []))
adamc@83 3442 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3443 end
adamc@41 3444 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3445 let
adamc@83 3446 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3447 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3448 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3449
adamc@83 3450 val (formal, gs3) =
adamc@41 3451 case ranO of
adamc@83 3452 NONE => (actual, [])
adamc@41 3453 | SOME ran =>
adamc@41 3454 let
adamc@83 3455 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3456 in
adamc@628 3457 subSgn env' actual ran';
adamc@83 3458 (ran', gs)
adamc@41 3459 end
adamc@41 3460 in
adamc@41 3461 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3462 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 3463 enD gs1 @ gs2 @ enD gs3)
adamc@41 3464 end
adamc@44 3465 | L.StrApp (str1, str2) =>
adamc@44 3466 let
adamc@83 3467 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 3468 val str2 =
adamc@325 3469 case sgn1 of
adamc@325 3470 (L'.SgnFun (_, _, dom, _), _) =>
adamc@325 3471 wildifyStr env (str2, dom)
adamc@325 3472 | _ => str2
adamc@83 3473 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3474 in
adamc@44 3475 case #1 (hnormSgn env sgn1) of
adamc@83 3476 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3477 | L'.SgnFun (m, n, dom, ran) =>
adamc@628 3478 (subSgn env sgn2 dom;
adamc@44 3479 case #1 (hnormSgn env ran) of
adamc@83 3480 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3481 | L'.SgnConst sgis =>
adamc@44 3482 ((L'.StrApp (str1', str2'), loc),
adamc@83 3483 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3484 gs1 @ gs2)
adamc@44 3485 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3486 | _ => (strError env (NotFunctor sgn1);
adamc@83 3487 (strerror, sgnerror, []))
adamc@44 3488 end
adamc@31 3489
adamc@325 3490 fun elabFile basis topStr topSgn env file =
adamc@56 3491 let
adamc@83 3492 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3493 val () = case gs of
adamc@83 3494 [] => ()
adamc@207 3495 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3496 prefaces "Unresolved"
adamc@207 3497 [("c1", p_con env c1),
adamc@207 3498 ("c2", p_con env c2)]) gs;
adamc@207 3499 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3500
adamc@56 3501 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3502 val () = basis_r := basis_n
adamc@56 3503
adamc@628 3504 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 3505
adamc@56 3506 fun discoverC r x =
adamc@56 3507 case E.lookupC env' x of
adamc@56 3508 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3509 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3510 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3511
adamc@56 3512 val () = discoverC int "int"
adamc@56 3513 val () = discoverC float "float"
adamc@56 3514 val () = discoverC string "string"
adamc@203 3515 val () = discoverC table "sql_table"
adamc@56 3516
adamc@325 3517 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adamc@325 3518 val () = case gs of
adamc@325 3519 [] => ()
adamc@325 3520 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adamc@325 3521 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adamc@325 3522 val () = case gs of
adamc@325 3523 [] => ()
adamc@329 3524 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@329 3525 (case D.prove env denv (c1, c2, loc) of
adamc@329 3526 [] => ()
adamc@329 3527 | _ =>
adamc@329 3528 (prefaces "Unresolved constraint in top.ur"
adamc@329 3529 [("loc", PD.string (ErrorMsg.spanToString loc)),
adamc@329 3530 ("c1", p_con env c1),
adamc@329 3531 ("c2", p_con env c2)];
adamc@478 3532 raise Fail "Unresolved constraint in top.ur"))
adamc@564 3533 | TypeClass (env, c, r, loc) =>
adamc@564 3534 let
adamc@564 3535 val c = normClassKey env c
adamc@564 3536 in
adamc@564 3537 case E.resolveClass env c of
adamc@564 3538 SOME e => r := SOME e
adamc@564 3539 | NONE => expError env (Unresolvable (loc, c))
adamc@634 3540 end) gs
adamc@564 3541
adamc@628 3542 val () = subSgn env' topSgn' topSgn
adamc@325 3543
adamc@325 3544 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adamc@633 3545 val () = top_r := top_n
adamc@325 3546
adamc@628 3547 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 3548
adamc@83 3549 fun elabDecl' (d, (env, gs)) =
adamc@76 3550 let
adamc@76 3551 val () = resetKunif ()
adamc@76 3552 val () = resetCunif ()
adamc@88 3553 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3554 in
adamc@76 3555 if ErrorMsg.anyErrors () then
adamc@76 3556 ()
adamc@76 3557 else (
adamc@76 3558 if List.exists kunifsInDecl ds then
adamc@91 3559 declError env (KunifsRemain ds)
adamc@76 3560 else
adamc@76 3561 ();
adamc@76 3562
adamc@76 3563 case ListUtil.search cunifsInDecl ds of
adamc@76 3564 NONE => ()
adamc@76 3565 | SOME loc =>
adamc@91 3566 declError env (CunifsRemain ds)
adamc@76 3567 );
adamc@76 3568
adamc@83 3569 (ds, (env, gs))
adamc@76 3570 end
adamc@76 3571
adamc@83 3572 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3573 in
adamc@84 3574 if ErrorMsg.anyErrors () then
adamc@84 3575 ()
adamc@84 3576 else
adamc@228 3577 app (fn Disjoint (loc, env, denv, c1, c2) =>
adamc@228 3578 (case D.prove env denv (c1, c2, loc) of
adamc@228 3579 [] => ()
adamc@228 3580 | _ =>
adamc@228 3581 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@228 3582 eprefaces' [("Con 1", p_con env c1),
adamc@228 3583 ("Con 2", p_con env c2),
adamc@228 3584 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@228 3585 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))]))
adamc@228 3586 | TypeClass (env, c, r, loc) =>
adamc@349 3587 let
adamc@634 3588 fun default () = expError env (Unresolvable (loc, c))
adamc@634 3589
adamc@467 3590 val c = normClassKey env c
adamc@349 3591 in
adamc@349 3592 case E.resolveClass env c of
adamc@349 3593 SOME e => r := SOME e
adamc@634 3594 | NONE =>
adamc@634 3595 case #1 (hnormCon env c) of
adamc@634 3596 L'.CApp (f, x) =>
adamc@634 3597 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adamc@634 3598 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adamc@634 3599 (case #1 (hnormCon env f) of
adamc@634 3600 L'.CModProj (top_n', [], "folder") =>
adamc@634 3601 if top_n' = top_n then
adamc@634 3602 let
adamc@634 3603 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adamc@634 3604 val e = (L'.EKApp (e, k), loc)
adamc@634 3605
adamc@634 3606 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adamc@634 3607 let
adamc@634 3608 val e = (L'.EModProj (top_n, ["Folder"],
adamc@634 3609 "cons"), loc)
adamc@634 3610 val e = (L'.EKApp (e, k), loc)
adamc@634 3611 val e = (L'.ECApp (e,
adamc@634 3612 (L'.CRecord (k, xcs),
adamc@634 3613 loc)), loc)
adamc@634 3614 val e = (L'.ECApp (e, x), loc)
adamc@634 3615 val e = (L'.ECApp (e, c), loc)
adamc@634 3616 val e = (L'.EApp (e, folder), loc)
adamc@634 3617 in
adamc@634 3618 (e, (x, c) :: xcs)
adamc@634 3619 end)
adamc@634 3620 (e, []) xcs
adamc@634 3621 in
adamc@634 3622 r := SOME folder
adamc@634 3623 end
adamc@634 3624 else
adamc@634 3625 default ()
adamc@634 3626 | _ => default ())
adamc@634 3627 | _ => default ())
adamc@634 3628 | _ => default ()
adamc@349 3629 end) gs;
adamc@83 3630
adamc@325 3631 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 3632 :: ds
adamc@325 3633 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 3634 :: ds' @ file
adamc@56 3635 end
adamc@2 3636
adamc@2 3637 end