Mercurial > urweb

annotate src/elaborate.sml @ 2087:834b438d57f3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Move code from last changeset, to improve performance
author Adam Chlipala <adam@chlipala.net>
date Fri, 05 Dec 2014 19:41:27 -0500
parents 459ccbf8cd08
children d4eb9b6729f8
rev   line source
adam@2044 1 (* Copyright (c) 2008-2014, 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
adam@1531 41 val dumpTypes = ref false
adam@1745 42 val dumpTypesOnError = ref false
adam@1723 43 val unifyMore = ref false
adam@1733 44 val incremental = ref false
adam@1744 45 val verbose = ref false
adam@1531 46
adamc@819 47 structure IS = IntBinarySet
adamc@403 48 structure IM = IntBinaryMap
adamc@403 49
adamc@403 50 structure SK = struct
adamc@403 51 type ord_key = string
adamc@403 52 val compare = String.compare
adamc@403 53 end
adamc@403 54
adamc@403 55 structure SS = BinarySetFn(SK)
adamc@403 56 structure SM = BinaryMapFn(SK)
adamc@403 57
adamc@403 58 val basis_r = ref 0
adamc@633 59 val top_r = ref 0
adamc@403 60
adamc@403 61 fun elabExplicitness e =
adamc@403 62 case e of
adamc@403 63 L.Explicit => L'.Explicit
adamc@403 64 | L.Implicit => L'.Implicit
adamc@403 65
adamc@403 66 fun occursKind r =
adamc@403 67 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@403 68 | _ => false)
adamc@403 69
adam@1639 70 fun validateCon env c =
adam@1639 71 (U.Con.appB {kind = fn env' => fn k => case k of
adam@1639 72 L'.KRel n => ignore (E.lookupKRel env' n)
adam@1639 73 | L'.KUnif (_, _, r as ref (L'.KUnknown f)) =>
adam@1639 74 r := L'.KUnknown (fn k => f k andalso validateKind env' k)
adam@1639 75 | _ => (),
adam@1639 76 con = fn env' => fn c => case c of
adam@1639 77 L'.CRel n => ignore (E.lookupCRel env' n)
adam@1639 78 | L'.CNamed n => ignore (E.lookupCNamed env' n)
adam@1639 79 | L'.CModProj (n, _, _) => ignore (E.lookupStrNamed env' n)
adam@1639 80 | L'.CUnif (_, _, _, _, r as ref (L'.Unknown f)) =>
adam@1639 81 r := L'.Unknown (fn c => f c andalso validateCon env' c)
adam@1639 82 | _ => (),
adam@1639 83 bind = fn (env', b) => case b of
adam@1639 84 U.Con.RelK x => E.pushKRel env' x
adam@1639 85 | U.Con.RelC (x, k) => E.pushCRel env' x k
adam@1639 86 | U.Con.NamedC (x, n, k, co) => E.pushCNamedAs env x n k co}
adam@1639 87 env c;
adam@1639 88 true)
adam@1639 89 handle _ => false
adam@1639 90
adam@1639 91 and validateKind env k = validateCon env (L'.CRecord (k, []), ErrorMsg.dummySpan)
adam@1639 92
adam@1719 93 exception KUnify' of E.env * kunify_error
adamc@403 94
adamc@623 95 fun unifyKinds' env (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@403 96 let
adam@1719 97 fun err f = raise KUnify' (env, f (k1All, k2All))
adamc@403 98 in
adamc@403 99 case (k1, k2) of
adamc@403 100 (L'.KType, L'.KType) => ()
adamc@403 101 | (L'.KUnit, L'.KUnit) => ()
adamc@403 102
adamc@403 103 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@623 104 (unifyKinds' env d1 d2;
adamc@623 105 unifyKinds' env r1 r2)
adamc@403 106 | (L'.KName, L'.KName) => ()
adamc@623 107 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' env k1 k2
adamc@403 108 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@623 109 ((ListPair.appEq (fn (k1, k2) => unifyKinds' env k1 k2) (ks1, ks2))
adamc@403 110 handle ListPair.UnequalLengths => err KIncompatible)
adamc@403 111
adamc@623 112 | (L'.KRel n1, L'.KRel n2) =>
adamc@623 113 if n1 = n2 then
adamc@623 114 ()
adamc@623 115 else
adamc@623 116 err KIncompatible
adamc@623 117 | (L'.KFun (x, k1), L'.KFun (_, k2)) =>
adamc@623 118 unifyKinds' (E.pushKRel env x) k1 k2
adamc@623 119
adamc@403 120 | (L'.KError, _) => ()
adamc@403 121 | (_, L'.KError) => ()
adamc@403 122
adam@1639 123 | (L'.KUnif (_, _, ref (L'.KKnown k1All)), _) => unifyKinds' env k1All k2All
adam@1639 124 | (_, L'.KUnif (_, _, ref (L'.KKnown k2All))) => unifyKinds' env k1All k2All
adam@1639 125
adam@1639 126 | (L'.KTupleUnif (_, _, ref (L'.KKnown k)), _) => unifyKinds' env k k2All
adam@1639 127 | (_, L'.KTupleUnif (_, _, ref (L'.KKnown k))) => unifyKinds' env k1All k
adam@1639 128
adam@1639 129 | (L'.KUnif (_, _, r1 as ref (L'.KUnknown f1)), L'.KUnif (_, _, r2 as ref (L'.KUnknown f2))) =>
adamc@403 130 if r1 = r2 then
adamc@403 131 ()
adamc@403 132 else
adam@1639 133 (r1 := L'.KKnown k2All;
adam@1639 134 r2 := L'.KUnknown (fn x => f1 x andalso f2 x))
adam@1639 135
adam@1639 136 | (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@403 137 if occursKind r k2All then
adamc@403 138 err KOccursCheckFailed
adam@1639 139 else if not (f k2All) then
adam@1639 140 err KScope
adamc@403 141 else
adam@1639 142 r := L'.KKnown k2All
adam@1639 143 | (_, L'.KUnif (_, _, r as ref (L'.KUnknown f))) =>
adamc@403 144 if occursKind r k1All then
adamc@403 145 err KOccursCheckFailed
adam@1639 146 else if not (f k1All) then
adam@1639 147 err KScope
adamc@403 148 else
adam@1639 149 r := L'.KKnown k1All
adam@1639 150
adam@1639 151 | (L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f)), L'.KTuple ks) =>
adam@1639 152 if not (f k2All) then
adam@1639 153 err KScope
adam@1639 154 else
adam@1639 155 ((app (fn (n, k) => unifyKinds' env k (List.nth (ks, n-1))) nks;
adam@1639 156 r := L'.KKnown k2All)
adam@1639 157 handle Subscript => err KIncompatible)
adam@1639 158 | (L'.KTuple ks, L'.KTupleUnif (_, nks, r as ref (L'.KUnknown f))) =>
adam@1639 159 if not (f k2All) then
adam@1639 160 err KScope
adam@1639 161 else
adam@1639 162 ((app (fn (n, k) => unifyKinds' env (List.nth (ks, n-1)) k) nks;
adam@1639 163 r := L'.KKnown k1All)
adam@1639 164 handle Subscript => err KIncompatible)
adam@1639 165 | (L'.KTupleUnif (loc, nks1, r1 as ref (L'.KUnknown f1)), L'.KTupleUnif (_, nks2, r2 as ref (L'.KUnknown f2))) =>
adam@1302 166 let
adam@1302 167 val nks = foldl (fn (p as (n, k1), nks) =>
adam@1302 168 case ListUtil.search (fn (n', k2) =>
adam@1302 169 if n' = n then
adam@1302 170 SOME k2
adam@1302 171 else
adam@1302 172 NONE) nks2 of
adam@1302 173 NONE => p :: nks
adam@1302 174 | SOME k2 => (unifyKinds' env k1 k2;
adam@1302 175 nks)) nks2 nks1
adam@1302 176
adam@1639 177 val k = (L'.KTupleUnif (loc, nks, ref (L'.KUnknown (fn x => f1 x andalso f2 x))), loc)
adam@1302 178 in
adam@1639 179 r1 := L'.KKnown k;
adam@1639 180 r2 := L'.KKnown k
adam@1302 181 end
adam@1302 182
adamc@403 183 | _ => err KIncompatible
adamc@403 184 end
adamc@403 185
adam@1719 186 exception KUnify of L'.kind * L'.kind * E.env * kunify_error
adamc@403 187
adamc@623 188 fun unifyKinds env k1 k2 =
adamc@623 189 unifyKinds' env k1 k2
adam@1719 190 handle KUnify' (env', err) => raise KUnify (k1, k2, env', err)
adamc@403 191
adamc@403 192 fun checkKind env c k1 k2 =
adamc@623 193 unifyKinds env k1 k2
adam@1719 194 handle KUnify (k1, k2, env', err) =>
adam@1719 195 conError env (WrongKind (c, k1, k2, env', err))
adamc@403 196
adamc@403 197 val dummy = ErrorMsg.dummySpan
adamc@403 198
adamc@403 199 val ktype = (L'.KType, dummy)
adamc@403 200 val kname = (L'.KName, dummy)
adamc@403 201 val ktype_record = (L'.KRecord ktype, dummy)
adamc@403 202
adamc@403 203 val cerror = (L'.CError, dummy)
adamc@403 204 val kerror = (L'.KError, dummy)
adamc@403 205 val eerror = (L'.EError, dummy)
adamc@403 206 val sgnerror = (L'.SgnError, dummy)
adamc@403 207 val strerror = (L'.StrError, dummy)
adamc@403 208
adamc@403 209 val int = ref cerror
adamc@403 210 val float = ref cerror
adamc@403 211 val string = ref cerror
adamc@821 212 val char = ref cerror
adamc@403 213 val table = ref cerror
adamc@403 214
adam@1639 215
adamc@403 216 local
adamc@403 217 val count = ref 0
adamc@403 218 in
adamc@403 219
adamc@403 220 fun resetKunif () = count := 0
adamc@403 221
adam@1639 222 fun kunif' f loc =
adamc@403 223 let
adamc@403 224 val n = !count
adamc@403 225 val s = if n <= 26 then
adamc@403 226 str (chr (ord #"A" + n))
adamc@403 227 else
adamc@403 228 "U" ^ Int.toString (n - 26)
adamc@403 229 in
adamc@403 230 count := n + 1;
adam@1639 231 (L'.KUnif (loc, s, ref (L'.KUnknown f)), loc)
adamc@403 232 end
adamc@403 233
adam@1639 234 fun kunif env = kunif' (validateKind env)
adam@1639 235
adamc@403 236 end
adamc@403 237
adamc@403 238 local
adamc@403 239 val count = ref 0
adamc@403 240 in
adamc@403 241
adamc@403 242 fun resetCunif () = count := 0
adamc@403 243
adam@1639 244 fun cunif' f (loc, k) =
adamc@403 245 let
adamc@403 246 val n = !count
adamc@712 247 val s = if n < 26 then
adamc@403 248 str (chr (ord #"A" + n))
adamc@403 249 else
adamc@403 250 "U" ^ Int.toString (n - 26)
adamc@403 251 in
adamc@403 252 count := n + 1;
adam@1639 253 (L'.CUnif (0, loc, k, s, ref (L'.Unknown f)), loc)
adamc@403 254 end
adamc@403 255
adam@1639 256 fun cunif env = cunif' (validateCon env)
adam@1639 257
adamc@403 258 end
adamc@403 259
adamc@623 260 fun elabKind env (k, loc) =
adamc@403 261 case k of
adamc@403 262 L.KType => (L'.KType, loc)
adamc@623 263 | L.KArrow (k1, k2) => (L'.KArrow (elabKind env k1, elabKind env k2), loc)
adamc@403 264 | L.KName => (L'.KName, loc)
adamc@623 265 | L.KRecord k => (L'.KRecord (elabKind env k), loc)
adamc@403 266 | L.KUnit => (L'.KUnit, loc)
adamc@623 267 | L.KTuple ks => (L'.KTuple (map (elabKind env) ks), loc)
adam@1639 268 | L.KWild => kunif env loc
adamc@403 269
adamc@623 270 | L.KVar s => (case E.lookupK env s of
adamc@623 271 NONE =>
adamc@623 272 (kindError env (UnboundKind (loc, s));
adamc@623 273 kerror)
adamc@623 274 | SOME n => (L'.KRel n, loc))
adamc@623 275 | L.KFun (x, k) => (L'.KFun (x, elabKind (E.pushKRel env x) k), loc)
adamc@623 276
adamc@621 277 fun mapKind (dom, ran, loc)=
adamc@621 278 (L'.KArrow ((L'.KArrow (dom, ran), loc),
adamc@621 279 (L'.KArrow ((L'.KRecord dom, loc),
adamc@621 280 (L'.KRecord ran, loc)), loc)), loc)
adamc@403 281
adamc@403 282 fun hnormKind (kAll as (k, _)) =
adamc@403 283 case k of
adam@1639 284 L'.KUnif (_, _, ref (L'.KKnown k)) => hnormKind k
adamc@403 285 | _ => kAll
adamc@403 286
adamc@623 287 open ElabOps
adamc@623 288
adam@1639 289 fun elabConHead env (c as (_, loc)) k =
adamc@623 290 let
adamc@623 291 fun unravel (k, c) =
adamc@623 292 case hnormKind k of
adamc@623 293 (L'.KFun (x, k'), _) =>
adamc@623 294 let
adam@1639 295 val u = kunif env loc
adamc@623 296
adamc@623 297 val k'' = subKindInKind (0, u) k'
adamc@623 298 in
adamc@623 299 unravel (k'', (L'.CKApp (c, u), loc))
adamc@623 300 end
adamc@623 301 | _ => (c, k)
adamc@623 302 in
adamc@623 303 unravel (k, c)
adamc@623 304 end
adamc@623 305
adamc@403 306 fun elabCon (env, denv) (c, loc) =
adamc@403 307 case c of
adamc@403 308 L.CAnnot (c, k) =>
adamc@403 309 let
adamc@623 310 val k' = elabKind env k
adamc@403 311 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 312 in
adamc@403 313 checkKind env c' ck k';
adamc@403 314 (c', k', gs)
adamc@403 315 end
adamc@403 316
adamc@403 317 | L.TFun (t1, t2) =>
adamc@403 318 let
adamc@403 319 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@403 320 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@403 321 in
adamc@403 322 checkKind env t1' k1 ktype;
adamc@403 323 checkKind env t2' k2 ktype;
adamc@403 324 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@403 325 end
adamc@403 326 | L.TCFun (e, x, k, t) =>
adamc@403 327 let
adamc@403 328 val e' = elabExplicitness e
adamc@623 329 val k' = elabKind env k
adamc@403 330 val env' = E.pushCRel env x k'
adamc@403 331 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 332 in
adamc@403 333 checkKind env t' tk ktype;
adamc@403 334 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@403 335 end
adamc@623 336 | L.TKFun (x, t) =>
adamc@623 337 let
adamc@623 338 val env' = E.pushKRel env x
adamc@623 339 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 340 in
adamc@623 341 checkKind env t' tk ktype;
adamc@623 342 ((L'.TKFun (x, t'), loc), ktype, gs)
adamc@623 343 end
adamc@628 344 | L.TDisjoint (c1, c2, c) =>
adamc@403 345 let
adamc@403 346 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 347 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@403 348
adam@1639 349 val ku1 = kunif env loc
adam@1639 350 val ku2 = kunif env loc
adamc@403 351
adamc@628 352 val denv' = D.assert env denv (c1', c2')
adamc@403 353 val (c', k, gs4) = elabCon (env, denv') c
adamc@403 354 in
adamc@403 355 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@403 356 checkKind env c2' k2 (L'.KRecord ku2, loc);
adam@1351 357 checkKind env c' k (L'.KType, loc);
adamc@403 358
adamc@628 359 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs4)
adamc@403 360 end
adamc@403 361 | L.TRecord c =>
adamc@403 362 let
adamc@403 363 val (c', ck, gs) = elabCon (env, denv) c
adamc@403 364 val k = (L'.KRecord ktype, loc)
adamc@403 365 in
adamc@403 366 checkKind env c' ck k;
adamc@403 367 ((L'.TRecord c', loc), ktype, gs)
adamc@403 368 end
adamc@403 369
adamc@403 370 | L.CVar ([], s) =>
adamc@403 371 (case E.lookupC env s of
adamc@403 372 E.NotBound =>
adamc@403 373 (conError env (UnboundCon (loc, s));
adamc@403 374 (cerror, kerror, []))
adamc@403 375 | E.Rel (n, k) =>
adamc@623 376 let
adam@1639 377 val (c, k) = elabConHead env (L'.CRel n, loc) k
adamc@623 378 in
adamc@623 379 (c, k, [])
adamc@623 380 end
adamc@403 381 | E.Named (n, k) =>
adamc@623 382 let
adam@1639 383 val (c, k) = elabConHead env (L'.CNamed n, loc) k
adamc@623 384 in
adamc@623 385 (c, k, [])
adamc@623 386 end)
adamc@403 387 | L.CVar (m1 :: ms, s) =>
adamc@403 388 (case E.lookupStr env m1 of
adamc@403 389 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@403 390 (cerror, kerror, []))
adamc@403 391 | SOME (n, sgn) =>
adamc@403 392 let
adamc@403 393 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 394 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 395 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@403 396 (strerror, sgnerror))
adamc@403 397 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 398 ((L'.StrVar n, loc), sgn) ms
adamc@403 399
adam@1717 400 val (c, k) = case E.projectCon env {sgn = sgn, str = str, field = s} of
adam@1717 401 NONE => (conError env (UnboundCon (loc, s));
adam@1717 402 (cerror, kerror))
adam@1717 403 | SOME (k, _) => elabConHead env (L'.CModProj (n, ms, s), loc) k
adamc@403 404 in
adamc@987 405 (c, k, [])
adamc@403 406 end)
adamc@403 407
adamc@403 408 | L.CApp (c1, c2) =>
adamc@403 409 let
adamc@403 410 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 411 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639 412 val dom = kunif env loc
adam@1639 413 val ran = kunif env loc
adamc@403 414 in
adamc@403 415 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@403 416 checkKind env c2' k2 dom;
adamc@403 417 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@403 418 end
adamc@403 419 | L.CAbs (x, ko, t) =>
adamc@403 420 let
adamc@403 421 val k' = case ko of
adam@1639 422 NONE => kunif env loc
adamc@623 423 | SOME k => elabKind env k
adamc@403 424 val env' = E.pushCRel env x k'
adamc@403 425 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@403 426 in
adamc@403 427 ((L'.CAbs (x, k', t'), loc),
adamc@403 428 (L'.KArrow (k', tk), loc),
adamc@403 429 gs)
adamc@403 430 end
adamc@623 431 | L.CKAbs (x, t) =>
adamc@623 432 let
adamc@623 433 val env' = E.pushKRel env x
adamc@623 434 val (t', tk, gs) = elabCon (env', denv) t
adamc@623 435 in
adamc@623 436 ((L'.CKAbs (x, t'), loc),
adamc@623 437 (L'.KFun (x, tk), loc),
adamc@623 438 gs)
adamc@623 439 end
adamc@403 440
adamc@403 441 | L.CName s =>
adamc@403 442 ((L'.CName s, loc), kname, [])
adamc@403 443
adamc@403 444 | L.CRecord xcs =>
adamc@403 445 let
adam@1639 446 val k = kunif env loc
adamc@403 447
adamc@403 448 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@403 449 let
adamc@403 450 val (x', xk, gs1) = elabCon (env, denv) x
adamc@403 451 val (c', ck, gs2) = elabCon (env, denv) c
adamc@403 452 in
adamc@403 453 checkKind env x' xk kname;
adamc@403 454 checkKind env c' ck k;
adamc@403 455 ((x', c'), gs1 @ gs2 @ gs)
adamc@403 456 end) [] xcs
adamc@403 457
adamc@403 458 val rc = (L'.CRecord (k, xcs'), loc)
adamc@403 459 (* Add duplicate field checking later. *)
adamc@403 460
adamc@403 461 fun prove (xcs, ds) =
adamc@403 462 case xcs of
adamc@403 463 [] => ds
adamc@403 464 | xc :: rest =>
adamc@403 465 let
adamc@403 466 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@403 467 val ds = foldl (fn (xc', ds) =>
adamc@403 468 let
adamc@403 469 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@403 470 in
adamc@403 471 D.prove env denv (r1, r2, loc) @ ds
adamc@403 472 end)
adamc@403 473 ds rest
adamc@403 474 in
adamc@403 475 prove (rest, ds)
adamc@403 476 end
adamc@403 477 in
adamc@403 478 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@403 479 end
adamc@403 480 | L.CConcat (c1, c2) =>
adamc@403 481 let
adamc@403 482 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@403 483 val (c2', k2, gs2) = elabCon (env, denv) c2
adam@1639 484 val ku = kunif env loc
adamc@403 485 val k = (L'.KRecord ku, loc)
adamc@403 486 in
adamc@403 487 checkKind env c1' k1 k;
adamc@403 488 checkKind env c2' k2 k;
adamc@403 489 ((L'.CConcat (c1', c2'), loc), k,
adamc@403 490 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@403 491 end
adamc@621 492 | L.CMap =>
adamc@403 493 let
adam@1639 494 val dom = kunif env loc
adam@1639 495 val ran = kunif env loc
adamc@403 496 in
adamc@621 497 ((L'.CMap (dom, ran), loc),
adamc@621 498 mapKind (dom, ran, loc),
adamc@403 499 [])
adamc@403 500 end
adamc@403 501
adamc@403 502 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@403 503
adamc@403 504 | L.CTuple cs =>
adamc@403 505 let
adamc@403 506 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@403 507 let
adamc@403 508 val (c', k, gs') = elabCon (env, denv) c
adamc@403 509 in
adamc@403 510 (c' :: cs', k :: ks, gs' @ gs)
adamc@403 511 end) ([], [], []) cs
adamc@403 512 in
adamc@403 513 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@403 514 end
adamc@403 515 | L.CProj (c, n) =>
adamc@403 516 let
adamc@403 517 val (c', k, gs) = elabCon (env, denv) c
adam@1302 518
adam@1639 519 val k' = kunif env loc
adamc@403 520 in
adam@1302 521 if n <= 0 then
adam@1302 522 (conError env (ProjBounds (c', n));
adam@1302 523 (cerror, kerror, []))
adam@1302 524 else
adam@1639 525 (checkKind env c' k (L'.KTupleUnif (loc, [(n, k')], ref (L'.KUnknown (validateKind env))), loc);
adam@1302 526 ((L'.CProj (c', n), loc), k', gs))
adamc@403 527 end
adamc@403 528
adamc@403 529 | L.CWild k =>
adamc@403 530 let
adamc@623 531 val k' = elabKind env k
adamc@403 532 in
adam@1639 533 (cunif env (loc, k'), k', [])
adamc@403 534 end
adamc@403 535
adamc@403 536 fun kunifsRemain k =
adamc@403 537 case k of
adam@1639 538 L'.KUnif (_, _, ref (L'.KUnknown _)) => true
adam@1639 539 | L'.KTupleUnif (_, _, ref (L'.KUnknown _)) => true
adamc@403 540 | _ => false
adamc@403 541 fun cunifsRemain c =
adamc@403 542 case c of
adam@1639 543 L'.CUnif (_, loc, k, _, r as ref (L'.Unknown _)) =>
adam@1326 544 (case #1 (hnormKind k) of
adam@1639 545 L'.KUnit => (r := L'.Known (L'.CUnit, loc); false)
adam@1584 546 | _ => true)
adam@1584 547 | _ => false
adamc@403 548
adamc@403 549 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@403 550 con = fn _ => false,
adamc@403 551 exp = fn _ => false,
adamc@403 552 sgn_item = fn _ => false,
adamc@403 553 sgn = fn _ => false,
adamc@403 554 str = fn _ => false,
adamc@403 555 decl = fn _ => false}
adamc@403 556
adam@1584 557 val cunifsInDecl = U.Decl.exists {kind = fn _ => false,
adamc@403 558 con = cunifsRemain,
adam@1584 559 exp = fn _ => false,
adam@1584 560 sgn_item = fn _ => false,
adam@1584 561 sgn = fn _ => false,
adam@1584 562 str = fn _ => false,
adam@1584 563 decl = fn _ => false}
adamc@403 564
adamc@403 565 fun occursCon r =
adamc@403 566 U.Con.exists {kind = fn _ => false,
adam@1303 567 con = fn L'.CUnif (_, _, _, _, r') => r = r'
adamc@403 568 | _ => false}
adamc@403 569
adam@1719 570 exception CUnify' of E.env * cunify_error
adamc@403 571
adamc@403 572 type record_summary = {
adamc@403 573 fields : (L'.con * L'.con) list,
adam@1639 574 unifs : (L'.con * L'.cunif ref) list,
adamc@403 575 others : L'.con list
adamc@403 576 }
adamc@403 577
adamc@403 578 fun summaryToCon {fields, unifs, others} =
adamc@403 579 let
adam@1626 580 fun concat (c1, c2) =
adam@1626 581 case #1 c1 of
adam@1626 582 L'.CRecord (_, []) => c2
adam@1626 583 | _ => case #1 c2 of
adam@1626 584 L'.CRecord (_, []) => c1
adam@1626 585 | _ => (L'.CConcat (c1, c2), dummy)
adam@1626 586
adamc@403 587 val c = (L'.CRecord (ktype, []), dummy)
adam@1626 588 val c = List.foldr concat c others
adam@1626 589 val c = List.foldr (fn ((c', _), c) => concat (c', c)) c unifs
adamc@403 590 in
adam@1626 591 concat ((L'.CRecord (ktype, fields), dummy), c)
adamc@403 592 end
adamc@403 593
adamc@403 594 fun p_summary env s = p_con env (summaryToCon s)
adamc@403 595
adam@1719 596 exception CUnify of L'.con * L'.con * E.env * cunify_error
adamc@403 597
adamc@403 598 fun kindof env (c, loc) =
adamc@403 599 case c of
adamc@403 600 L'.TFun _ => ktype
adamc@403 601 | L'.TCFun _ => ktype
adamc@403 602 | L'.TRecord _ => ktype
adamc@628 603 | L'.TDisjoint _ => ktype
adamc@403 604
adamc@403 605 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@403 606 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@403 607 | L'.CModProj (n, ms, x) =>
adamc@403 608 let
adamc@403 609 val (_, sgn) = E.lookupStrNamed env n
adamc@403 610 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@403 611 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@403 612 NONE => raise Fail "kindof: Unknown substructure"
adamc@403 613 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@403 614 ((L'.StrVar n, loc), sgn) ms
adamc@403 615 in
adamc@403 616 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@403 617 NONE => raise Fail "kindof: Unknown con in structure"
adamc@403 618 | SOME (k, _) => k
adamc@403 619 end
adamc@403 620
adamc@403 621 | L'.CApp (c, _) =>
adamc@403 622 (case hnormKind (kindof env c) of
adamc@403 623 (L'.KArrow (_, k), _) => k
adamc@403 624 | (L'.KError, _) => kerror
adam@1719 625 | k => raise CUnify' (env, CKindof (k, c, "arrow")))
adamc@403 626 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@628 627
adamc@403 628
adamc@403 629 | L'.CName _ => kname
adamc@403 630
adamc@403 631 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@403 632 | L'.CConcat (c, _) => kindof env c
adamc@621 633 | L'.CMap (dom, ran) => mapKind (dom, ran, loc)
adamc@403 634
adamc@403 635 | L'.CUnit => (L'.KUnit, loc)
adamc@403 636
adamc@403 637 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@403 638 | L'.CProj (c, n) =>
adamc@403 639 (case hnormKind (kindof env c) of
adamc@403 640 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adam@1311 641 | (L'.KUnif (_, _, r), _) =>
adam@1311 642 let
adam@1639 643 val ku = kunif env loc
adam@1639 644 val k = (L'.KTupleUnif (loc, [(n, ku)], r), loc)
adam@1311 645 in
adam@1639 646 r := L'.KKnown k;
adam@1311 647 k
adam@1311 648 end
adam@1311 649 | (L'.KTupleUnif (_, nks, r), _) =>
adam@1311 650 (case ListUtil.search (fn (n', k) => if n' = n then SOME k else NONE) nks of
adam@1311 651 SOME k => k
adam@1311 652 | NONE =>
adam@1311 653 let
adam@1639 654 val ku = kunif env loc
adam@1639 655 val k = (L'.KTupleUnif (loc, ((n, ku) :: nks), r), loc)
adam@1311 656 in
adam@1639 657 r := L'.KKnown k;
adam@1311 658 k
adam@1311 659 end)
adam@1719 660 | k => raise CUnify' (env, CKindof (k, c, "tuple")))
adamc@403 661
adamc@403 662 | L'.CError => kerror
adam@1303 663 | L'.CUnif (_, _, k, _, _) => k
adamc@403 664
adamc@623 665 | L'.CKAbs (x, c) => (L'.KFun (x, kindof (E.pushKRel env x) c), loc)
adamc@623 666 | L'.CKApp (c, k) =>
adamc@623 667 (case hnormKind (kindof env c) of
adamc@623 668 (L'.KFun (_, k'), _) => subKindInKind (0, k) k'
adam@1719 669 | k => raise CUnify' (env, CKindof (k, c, "kapp")))
adamc@623 670 | L'.TKFun _ => ktype
adamc@403 671
adamc@621 672 exception GuessFailure
adamc@403 673
adamc@513 674 fun isUnitCon env (c, loc) =
adamc@513 675 case c of
adamc@513 676 L'.TFun _ => false
adamc@513 677 | L'.TCFun _ => false
adamc@513 678 | L'.TRecord _ => false
adamc@628 679 | L'.TDisjoint _ => false
adamc@513 680
adam@1316 681 | L'.CRel xn => #1 (hnormKind (#2 (E.lookupCRel env xn))) = L'.KUnit
adam@1316 682 | L'.CNamed xn => #1 (hnormKind (#2 (E.lookupCNamed env xn))) = L'.KUnit
adamc@518 683 | L'.CModProj (n, ms, x) => false
adamc@518 684 (*let
adamc@513 685 val (_, sgn) = E.lookupStrNamed env n
adamc@513 686 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@513 687 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@513 688 NONE => raise Fail "kindof: Unknown substructure"
adamc@513 689 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@513 690 ((L'.StrVar n, loc), sgn) ms
adamc@513 691 in
adamc@513 692 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@513 693 NONE => raise Fail "kindof: Unknown con in structure"
adamc@513 694 | SOME ((k, _), _) => k = L'.KUnit
adamc@518 695 end*)
adamc@518 696
adamc@518 697 | L'.CApp (c, _) => false
adamc@518 698 (*(case hnormKind (kindof env c) of
adamc@513 699 (L'.KArrow (_, k), _) => #1 k = L'.KUnit
adamc@513 700 | (L'.KError, _) => false
adamc@518 701 | k => raise CUnify' (CKindof (k, c, "arrow")))*)
adamc@513 702 | L'.CAbs _ => false
adamc@513 703
adamc@513 704 | L'.CName _ => false
adamc@513 705
adamc@513 706 | L'.CRecord _ => false
adamc@513 707 | L'.CConcat _ => false
adamc@621 708 | L'.CMap _ => false
adamc@513 709
adamc@513 710 | L'.CUnit => true
adamc@513 711
adamc@513 712 | L'.CTuple _ => false
adamc@518 713 | L'.CProj (c, n) => false
adamc@518 714 (*(case hnormKind (kindof env c) of
adamc@513 715 (L'.KTuple ks, _) => #1 (List.nth (ks, n - 1)) = L'.KUnit
adamc@518 716 | k => raise CUnify' (CKindof (k, c, "tuple")))*)
adamc@513 717
adamc@513 718 | L'.CError => false
adam@1316 719 | L'.CUnif (_, _, k, _, _) => #1 (hnormKind k) = L'.KUnit
adamc@513 720
adamc@623 721 | L'.CKAbs _ => false
adamc@623 722 | L'.CKApp _ => false
adamc@623 723 | L'.TKFun _ => false
adamc@623 724
adamc@709 725 val recdCounter = ref 0
adamc@709 726
adamc@713 727 val mayDelay = ref false
adamc@777 728 val delayedUnifs = ref ([] : (ErrorMsg.span * E.env * L'.kind * record_summary * record_summary) list)
adamc@777 729
adamc@830 730 val delayedExhaustives = ref ([] : (E.env * L'.con * L'.pat list * ErrorMsg.span) list)
adamc@830 731
adam@1304 732 exception CantSquish
adam@1304 733
adam@1304 734 fun squish by =
adam@1304 735 U.Con.mapB {kind = fn _ => fn k => k,
adam@1304 736 con = fn bound => fn c =>
adam@1304 737 case c of
adam@1304 738 L'.CRel xn =>
adam@1304 739 if xn < bound then
adam@1304 740 c
adam@1304 741 else if bound <= xn andalso xn < bound + by then
adam@1304 742 raise CantSquish
adam@1304 743 else
adam@1304 744 L'.CRel (xn - by)
adam@1304 745 | L'.CUnif _ => raise CantSquish
adam@1304 746 | _ => c,
adam@1304 747 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1304 748 | (bound, _) => bound} 0
adam@1304 749
adam@1582 750 val reducedSummaries = ref (NONE : (Print.PD.pp_desc * Print.PD.pp_desc) option)
adam@1582 751
adamc@777 752 fun unifyRecordCons env (loc, c1, c2) =
adamc@403 753 let
adamc@403 754 fun rkindof c =
adamc@403 755 case hnormKind (kindof env c) of
adamc@403 756 (L'.KRecord k, _) => k
adamc@403 757 | (L'.KError, _) => kerror
adam@1639 758 | (L'.KUnif (_, _, r as ref (L'.KUnknown f)), _) =>
adamc@753 759 let
adam@1639 760 val k = kunif' f (#2 c)
adamc@753 761 in
adam@1639 762 r := L'.KKnown (L'.KRecord k, #2 c);
adamc@753 763 k
adamc@753 764 end
adam@1719 765 | k => raise CUnify' (env, CKindof (k, c, "record"))
adamc@403 766
adamc@403 767 val k1 = rkindof c1
adamc@403 768 val k2 = rkindof c2
adamc@403 769
adamc@628 770 val r1 = recordSummary env c1
adamc@628 771 val r2 = recordSummary env c2
adamc@403 772 in
adamc@623 773 unifyKinds env k1 k2;
adamc@777 774 unifySummaries env (loc, k1, r1, r2)
adamc@403 775 end
adamc@403 776
adamc@777 777 and normalizeRecordSummary env (r : record_summary) =
adamc@777 778 recordSummary env (summaryToCon r)
adamc@777 779
adamc@628 780 and recordSummary env c =
adamc@403 781 let
adamc@628 782 val c = hnormCon env c
adamc@628 783
adamc@628 784 val sum =
adamc@403 785 case c of
adamc@628 786 (L'.CRecord (_, xcs), _) => {fields = xcs, unifs = [], others = []}
adamc@403 787 | (L'.CConcat (c1, c2), _) =>
adamc@403 788 let
adamc@628 789 val s1 = recordSummary env c1
adamc@628 790 val s2 = recordSummary env c2
adamc@403 791 in
adamc@628 792 {fields = #fields s1 @ #fields s2,
adamc@628 793 unifs = #unifs s1 @ #unifs s2,
adamc@628 794 others = #others s1 @ #others s2}
adamc@403 795 end
adam@1639 796 | (L'.CUnif (nl, _, _, _, ref (L'.Known c)), _) => recordSummary env (E.mliftConInCon nl c)
adam@1303 797 | c' as (L'.CUnif (0, _, _, _, r), _) => {fields = [], unifs = [(c', r)], others = []}
adamc@628 798 | c' => {fields = [], unifs = [], others = [c']}
adamc@403 799 in
adamc@628 800 sum
adamc@403 801 end
adamc@403 802
adamc@987 803 and consEq env loc (c1, c2) =
adamc@777 804 let
adamc@777 805 val mayDelay' = !mayDelay
adamc@777 806 in
adamc@777 807 (mayDelay := false;
adamc@987 808 unifyCons env loc c1 c2;
adamc@777 809 mayDelay := mayDelay';
adamc@777 810 true)
adamc@777 811 handle CUnify _ => (mayDelay := mayDelay'; false)
adamc@777 812 end
adamc@403 813
adamc@403 814 and consNeq env (c1, c2) =
adamc@628 815 case (#1 (hnormCon env c1), #1 (hnormCon env c2)) of
adamc@403 816 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@1093 817 | (L'.CName _, L'.CRel _) => true
adamc@1093 818 | (L'.CRel _, L'.CName _) => true
adamc@1093 819 | (L'.CRel n1, L'.CRel n2) => n1 <> n2
adamc@1093 820 | (L'.CRel _, L'.CNamed _) => true
adamc@1093 821 | (L'.CNamed _, L'.CRel _) => true
adamc@1093 822 | (L'.CRel _, L'.CModProj _) => true
adamc@1093 823 | (L'.CModProj _, L'.CRel _) => true
adamc@1269 824 | (L'.CModProj (_, _, n1), L'.CModProj (_, _, n2)) => n1 <> n2
adam@1589 825 | (L'.CModProj _, L'.CName _) => true
adam@1589 826 | (L'.CName _, L'.CModProj _) => true
adam@1589 827 | (L'.CNamed _, L'.CName _) => true
adam@1589 828 | (L'.CName _, L'.CNamed _) => true
adamc@403 829 | _ => false
adamc@403 830
adamc@777 831 and unifySummaries env (loc, k, s1 : record_summary, s2 : record_summary) =
adamc@403 832 let
adam@1583 833 val () = reducedSummaries := NONE
adam@1583 834
adamc@848 835 (*val () = eprefaces "Summaries" [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1303 836 ("#1", p_summary env s1),
adam@1303 837 ("#2", p_summary env s2)]*)
adamc@403 838
adamc@403 839 fun eatMatching p (ls1, ls2) =
adamc@403 840 let
adamc@403 841 fun em (ls1, ls2, passed1) =
adamc@403 842 case ls1 of
adamc@403 843 [] => (rev passed1, ls2)
adamc@403 844 | h1 :: t1 =>
adamc@403 845 let
adamc@403 846 fun search (ls2', passed2) =
adamc@403 847 case ls2' of
adamc@403 848 [] => em (t1, ls2, h1 :: passed1)
adamc@403 849 | h2 :: t2 =>
adamc@403 850 if p (h1, h2) then
adamc@403 851 em (t1, List.revAppend (passed2, t2), passed1)
adamc@403 852 else
adamc@403 853 search (t2, h2 :: passed2)
adamc@403 854 in
adamc@403 855 search (ls2, [])
adamc@403 856 end
adamc@403 857 in
adamc@403 858 em (ls1, ls2, [])
adamc@403 859 end
adamc@403 860
adamc@403 861 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@403 862 not (consNeq env (x1, x2))
adamc@987 863 andalso consEq env loc (c1, c2)
adamc@987 864 andalso consEq env loc (x1, x2))
adamc@403 865 (#fields s1, #fields s2)
adamc@403 866 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@403 867 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@646 868
adamc@403 869 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@646 870
adam@1660 871 val hasUnifs = U.Con.exists {kind = fn _ => false,
adam@1660 872 con = fn L'.CUnif _ => true
adam@1660 873 | _ => false}
adam@1657 874
adam@1657 875 val (others1, others2) = eatMatching (fn (c1, c2) =>
adam@1964 876 c1 = c2
adam@1964 877 orelse (not (hasUnifs c1 andalso hasUnifs c2)
adam@1964 878 andalso consEq env loc (c1, c2))) (#others s1, #others s2)
adamc@403 879 (*val () = eprefaces "Summaries3" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@403 880 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 881
adamc@709 882 fun unsummarize {fields, unifs, others} =
adamc@709 883 let
adamc@709 884 val c = (L'.CRecord (k, fields), loc)
adamc@709 885
adamc@709 886 val c = foldl (fn ((c1, _), c2) => (L'.CConcat (c1, c2), loc))
adamc@709 887 c unifs
adamc@709 888 in
adamc@709 889 foldl (fn (c1, c2) => (L'.CConcat (c1, c2), loc))
adamc@709 890 c others
adamc@709 891 end
adamc@709 892
adamc@710 893 val empties = ([], [], [], [], [], [])
adamc@710 894
adamc@709 895 val (unifs1, fs1, others1, unifs2, fs2, others2) =
adamc@709 896 case (unifs1, fs1, others1, unifs2, fs2, others2) of
adam@1639 897 orig as ([(_, r as ref (L'.Unknown f))], [], [], _, _, _) =>
adamc@709 898 let
adamc@709 899 val c = unsummarize {fields = fs2, others = others2, unifs = unifs2}
adamc@709 900 in
adam@1639 901 if occursCon r c orelse not (f c) then
adamc@709 902 orig
adamc@709 903 else
adam@1639 904 (r := L'.Known c;
adamc@710 905 empties)
adamc@709 906 end
adam@1639 907 | orig as (_, _, _, [(_, r as ref (L'.Unknown f))], [], []) =>
adamc@709 908 let
adamc@709 909 val c = unsummarize {fields = fs1, others = others1, unifs = unifs1}
adamc@709 910 in
adam@1639 911 if occursCon r c orelse not (f c) then
adamc@709 912 orig
adamc@709 913 else
adam@1639 914 (r := L'.Known c;
adamc@710 915 empties)
adamc@709 916 end
adam@1639 917 | orig as ([(_, r1 as ref (L'.Unknown f1))], _, [], [(_, r2 as ref (L'.Unknown f2))], _, []) =>
adamc@710 918 if List.all (fn (x1, _) => List.all (fn (x2, _) => consNeq env (x1, x2)) fs2) fs1 then
adamc@710 919 let
adamc@838 920 val kr = (L'.KRecord k, loc)
adam@1639 921 val u = cunif env (loc, kr)
adam@1639 922
adam@1639 923 val c1 = (L'.CConcat ((L'.CRecord (k, fs2), loc), u), loc)
adam@1639 924 val c2 = (L'.CConcat ((L'.CRecord (k, fs1), loc), u), loc)
adamc@710 925 in
adam@1639 926 if not (f1 c1) orelse not (f2 c2) then
adam@1639 927 orig
adam@1639 928 else
adam@1639 929 (r1 := L'.Known c1;
adam@1639 930 r2 := L'.Known c2;
adam@1639 931 empties)
adamc@710 932 end
adamc@710 933 else
adamc@710 934 orig
adamc@709 935 | orig => orig
adamc@709 936
adamc@403 937 (*val () = eprefaces "Summaries4" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@777 938 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 939
adamc@753 940 fun isGuessable (other, fs, unifs) =
adamc@753 941 let
adamc@753 942 val c = (L'.CRecord (k, fs), loc)
adamc@753 943 val c = foldl (fn ((c', _), c) => (L'.CConcat (c', c), loc)) c unifs
adamc@753 944 in
adamc@987 945 (guessMap env loc (other, c, GuessFailure);
adamc@753 946 true)
adamc@753 947 handle GuessFailure => false
adamc@753 948 end
adamc@403 949
adamc@754 950 val (fs1, fs2, others1, others2, unifs1, unifs2) =
adamc@753 951 case (fs1, fs2, others1, others2, unifs1, unifs2) of
adamc@753 952 ([], _, [other1], [], [], _) =>
adamc@753 953 if isGuessable (other1, fs2, unifs2) then
adamc@754 954 ([], [], [], [], [], [])
adamc@403 955 else
adamc@754 956 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@753 957 | (_, [], [], [other2], _, []) =>
adamc@777 958 if isGuessable (other2, fs1, unifs1) then
adamc@777 959 ([], [], [], [], [], [])
adamc@777 960 else
adamc@777 961 (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@754 962 | _ => (fs1, fs2, others1, others2, unifs1, unifs2)
adamc@403 963
adam@1582 964 val () = if !mayDelay then
adam@1582 965 ()
adam@1582 966 else
adam@1626 967 let
adam@1626 968 val c1 = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1626 969 val c2 = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1626 970 in
adam@1626 971 case (c1, c2) of
adam@1626 972 ((L'.CRecord (_, []), _), (L'.CRecord (_, []), _)) => reducedSummaries := NONE
adam@1626 973 | _ => reducedSummaries := SOME (p_con env c1, p_con env c2)
adam@1626 974 end
adam@1582 975
adamc@403 976 (*val () = eprefaces "Summaries5" [("#1", p_summary env {fields = fs1, unifs = unifs1, others = others1}),
adamc@646 977 ("#2", p_summary env {fields = fs2, unifs = unifs2, others = others2})]*)
adamc@403 978
adamc@838 979 val empty = (L'.CRecord (k, []), loc)
adamc@1071 980 fun failure () =
adamc@1071 981 let
adamc@1071 982 val fs2 = #fields s2
adamc@1071 983
adamc@1071 984 fun findPointwise fs1 =
adamc@1071 985 case fs1 of
adamc@1071 986 [] => NONE
adamc@1071 987 | (nm1, c1) :: fs1 =>
adamc@1071 988 case List.find (fn (nm2, _) => consEq env loc (nm1, nm2)) fs2 of
adamc@1071 989 NONE => findPointwise fs1
adamc@1071 990 | SOME (_, c2) =>
adamc@1071 991 if consEq env loc (c1, c2) then
adamc@1071 992 findPointwise fs1
adamc@1071 993 else
adam@1588 994 SOME (nm1, c1, c2, (unifyCons env loc c1 c2; NONE)
adam@1719 995 handle CUnify (_, _, env', err) => (reducedSummaries := NONE;
adam@1719 996 SOME (env', err)))
adamc@1071 997 in
adam@1719 998 raise CUnify' (env, CRecordFailure (unsummarize s1, unsummarize s2, findPointwise (#fields s1)))
adamc@1071 999 end
adam@1341 1000
adam@1341 1001 fun default () = if !mayDelay then
adam@1341 1002 delayedUnifs := (loc, env, k, s1, s2) :: !delayedUnifs
adam@1341 1003 else
adam@1341 1004 failure ()
adamc@709 1005 in
adamc@777 1006 (case (unifs1, fs1, others1, unifs2, fs2, others2) of
adamc@777 1007 (_, [], [], [], [], []) =>
adam@1639 1008 app (fn (_, r) => r := L'.Known empty) unifs1
adamc@777 1009 | ([], [], [], _, [], []) =>
adam@1639 1010 app (fn (_, r) => r := L'.Known empty) unifs2
adam@1639 1011 | (_, _, _, [], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)]) =>
adam@1341 1012 let
adam@1341 1013 val c = summaryToCon {fields = fs1, unifs = unifs1, others = others1}
adam@1341 1014 in
adam@1341 1015 if occursCon r c then
adam@1588 1016 (reducedSummaries := NONE;
adam@1719 1017 raise CUnify' (env, COccursCheckFailed (cr, c)))
adam@1341 1018 else
adam@1639 1019 let
adam@1639 1020 val sq = squish nl c
adam@1639 1021 in
adam@1639 1022 if not (f sq) then
adam@1639 1023 default ()
adam@1639 1024 else
adam@1639 1025 r := L'.Known sq
adam@1639 1026 end
adam@1341 1027 handle CantSquish => default ()
adam@1341 1028 end
adam@1639 1029 | ([], [], [cr as (L'.CUnif (nl, _, _, _, r as ref (L'.Unknown f)), _)], _, _, _) =>
adam@1341 1030 let
adam@1341 1031 val c = summaryToCon {fields = fs2, unifs = unifs2, others = others2}
adam@1341 1032 in
adam@1341 1033 if occursCon r c then
adam@1588 1034 (reducedSummaries := NONE;
adam@1719 1035 raise CUnify' (env, COccursCheckFailed (cr, c)))
adam@1341 1036 else
adam@1639 1037 let
adam@1639 1038 val sq = squish nl c
adam@1639 1039 in
adam@1639 1040 if not (f sq) then
adam@1639 1041 default ()
adam@1639 1042 else
adam@1639 1043 r := L'.Known sq
adam@1639 1044 end
adam@1341 1045 handle CantSquish => default ()
adam@1341 1046 end
adam@1341 1047 | _ => default ())
adam@1341 1048
adamc@777 1049 (*before eprefaces "Summaries'" [("#1", p_summary env (normalizeRecordSummary env s1)),
adamc@777 1050 ("#2", p_summary env (normalizeRecordSummary env s2))]*)
adamc@403 1051 end
adamc@403 1052
adamc@987 1053 and guessMap env loc (c1, c2, ex) =
adamc@403 1054 let
adamc@621 1055 fun unfold (dom, ran, f, r, c) =
adamc@403 1056 let
adamc@621 1057 fun unfold (r, c) =
adamc@754 1058 case #1 (hnormCon env c) of
adamc@987 1059 L'.CRecord (_, []) => unifyCons env loc r (L'.CRecord (dom, []), loc)
adamc@628 1060 | L'.CRecord (_, [(x, v)]) =>
adamc@628 1061 let
adamc@628 1062 val v' = case dom of
adamc@628 1063 (L'.KUnit, _) => (L'.CUnit, loc)
adam@1639 1064 | _ => cunif env (loc, dom)
adamc@628 1065 in
adamc@987 1066 unifyCons env loc v (L'.CApp (f, v'), loc);
adamc@987 1067 unifyCons env loc r (L'.CRecord (dom, [(x, v')]), loc)
adamc@628 1068 end
adamc@628 1069 | L'.CRecord (_, (x, v) :: rest) =>
adamc@628 1070 let
adam@1639 1071 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639 1072 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628 1073 in
adamc@628 1074 unfold (r1, (L'.CRecord (ran, [(x, v)]), loc));
adamc@628 1075 unfold (r2, (L'.CRecord (ran, rest), loc));
adamc@987 1076 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 1077 end
adamc@628 1078 | L'.CConcat (c1', c2') =>
adamc@628 1079 let
adam@1639 1080 val r1 = cunif env (loc, (L'.KRecord dom, loc))
adam@1639 1081 val r2 = cunif env (loc, (L'.KRecord dom, loc))
adamc@628 1082 in
adamc@628 1083 unfold (r1, c1');
adamc@628 1084 unfold (r2, c2');
adamc@987 1085 unifyCons env loc r (L'.CConcat (r1, r2), loc)
adamc@628 1086 end
adam@1639 1087 | L'.CUnif (0, _, _, _, ur as ref (L'.Unknown rf)) =>
adam@1639 1088 let
adam@1639 1089 val c' = (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), loc), f), loc), r), loc)
adam@1639 1090 in
adam@1639 1091 if not (rf c') then
adam@1639 1092 cunifyError env (CScope (c, c'))
adam@1639 1093 else
adam@1639 1094 ur := L'.Known c'
adam@1639 1095 end
adamc@628 1096 | _ => raise ex
adamc@403 1097 in
adamc@621 1098 unfold (r, c)
adamc@403 1099 end
adamc@632 1100 handle _ => raise ex
adamc@403 1101 in
adamc@403 1102 case (#1 c1, #1 c2) of
adamc@621 1103 (L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r), _) =>
adamc@621 1104 unfold (dom, ran, f, r, c2)
adamc@621 1105 | (_, L'.CApp ((L'.CApp ((L'.CMap (dom, ran), _), f), _), r)) =>
adamc@621 1106 unfold (dom, ran, f, r, c1)
adamc@403 1107 | _ => raise ex
adamc@403 1108 end
adamc@403 1109
adamc@987 1110 and unifyCons' env loc c1 c2 =
adamc@628 1111 if isUnitCon env c1 andalso isUnitCon env c2 then
adamc@628 1112 ()
adamc@628 1113 else
adamc@403 1114 let
adamc@628 1115 (*val befor = Time.now ()
adamc@628 1116 val old1 = c1
adamc@628 1117 val old2 = c2*)
adamc@628 1118 val c1 = hnormCon env c1
adamc@628 1119 val c2 = hnormCon env c2
adamc@403 1120 in
adamc@987 1121 unifyCons'' env loc c1 c2
adamc@987 1122 handle ex => guessMap env loc (c1, c2, ex)
adamc@403 1123 end
adamc@628 1124
adamc@987 1125 and unifyCons'' env loc (c1All as (c1, _)) (c2All as (c2, _)) =
adamc@403 1126 let
adam@1719 1127 fun err f = raise CUnify' (env, f (c1All, c2All))
adamc@403 1128
adamc@706 1129 fun projSpecial1 (c1, n1, onFail) =
adamc@403 1130 let
adamc@632 1131 fun trySnd () =
adamc@632 1132 case #1 (hnormCon env c2All) of
adamc@632 1133 L'.CProj (c2, n2) =>
adamc@632 1134 let
adamc@632 1135 fun tryNormal () =
adamc@632 1136 if n1 = n2 then
adamc@987 1137 unifyCons' env loc c1 c2
adamc@632 1138 else
adamc@706 1139 onFail ()
adamc@632 1140 in
adamc@632 1141 case #1 (hnormCon env c2) of
adam@1639 1142 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632 1143 (case #1 (hnormKind k) of
adamc@632 1144 L'.KTuple ks =>
adamc@632 1145 let
adamc@632 1146 val loc = #2 c2
adam@1639 1147 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632 1148 in
adam@1639 1149 r := L'.Known (L'.CTuple us, loc);
adamc@987 1150 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@632 1151 end
adamc@632 1152 | _ => tryNormal ())
adamc@632 1153 | _ => tryNormal ()
adamc@632 1154 end
adamc@706 1155 | _ => onFail ()
adamc@403 1156 in
adamc@632 1157 case #1 (hnormCon env c1) of
adam@1639 1158 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@632 1159 (case #1 (hnormKind k) of
adamc@632 1160 L'.KTuple ks =>
adamc@632 1161 let
adamc@632 1162 val loc = #2 c1
adam@1639 1163 val us = map (fn k => cunif' f (loc, k)) ks
adamc@632 1164 in
adam@1639 1165 r := L'.Known (L'.CTuple us, loc);
adamc@987 1166 unifyCons' env loc (List.nth (us, n1 - 1)) c2All
adamc@632 1167 end
adamc@632 1168 | _ => trySnd ())
adamc@632 1169 | _ => trySnd ()
adamc@403 1170 end
adamc@632 1171
adamc@706 1172 fun projSpecial2 (c2, n2, onFail) =
adamc@706 1173 case #1 (hnormCon env c2) of
adam@1639 1174 L'.CUnif (0, _, k, _, r as ref (L'.Unknown f)) =>
adamc@706 1175 (case #1 (hnormKind k) of
adamc@706 1176 L'.KTuple ks =>
adamc@706 1177 let
adamc@706 1178 val loc = #2 c2
adam@1639 1179 val us = map (fn k => cunif' f (loc, k)) ks
adamc@706 1180 in
adam@1639 1181 r := L'.Known (L'.CTuple us, loc);
adamc@987 1182 unifyCons' env loc c1All (List.nth (us, n2 - 1))
adamc@706 1183 end
adamc@706 1184 | _ => onFail ())
adamc@706 1185 | _ => onFail ()
adamc@706 1186
adamc@777 1187 fun isRecord' () = unifyRecordCons env (loc, c1All, c2All)
adamc@706 1188
adamc@706 1189 fun isRecord () =
adamc@706 1190 case (c1, c2) of
adamc@706 1191 (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, isRecord')
adamc@706 1192 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, isRecord')
adamc@706 1193 | _ => isRecord' ()
adam@2044 1194
adam@2044 1195 fun maybeIsRecord c =
adam@2044 1196 case c of
adam@2044 1197 L'.CRecord _ => isRecord ()
adam@2044 1198 | L'.CConcat _ => isRecord ()
adam@2044 1199 | _ => err COccursCheckFailed
adamc@706 1200 in
adam@1668 1201 (*eprefaces "unifyCons''" [("c1", p_con env c1All),
adam@1668 1202 ("c2", p_con env c2All)];*)
adam@1668 1203
adam@1668 1204 (case (c1, c2) of
adamc@706 1205 (L'.CError, _) => ()
adamc@706 1206 | (_, L'.CError) => ()
adamc@403 1207
adam@1639 1208 | (L'.CUnif (nl1, loc1, k1, _, r1 as ref (L'.Unknown f1)), L'.CUnif (nl2, loc2, k2, _, r2 as ref (L'.Unknown f2))) =>
adam@1668 1209 if r1 = r2 then
adam@1668 1210 if nl1 = nl2 then
adam@1668 1211 ()
adam@1668 1212 else
adam@1668 1213 err (fn _ => TooLifty (loc1, loc2))
adam@1303 1214 else if nl1 = 0 then
adamc@705 1215 (unifyKinds env k1 k2;
adam@1639 1216 if f1 c2All then
adam@1639 1217 r1 := L'.Known c2All
adam@1639 1218 else
adam@1639 1219 err CScope)
adam@1303 1220 else if nl2 = 0 then
adam@1303 1221 (unifyKinds env k1 k2;
adam@1639 1222 if f2 c1All then
adam@1639 1223 r2 := L'.Known c1All
adam@1639 1224 else
adam@1639 1225 err CScope)
adam@1303 1226 else
adam@1303 1227 err (fn _ => TooLifty (loc1, loc2))
adam@1303 1228
adam@2049 1229 | (L'.CUnif (0, _, k1, _, r as ref (L'.Unknown f)), _) =>
adam@2049 1230 (unifyKinds env k1 (kindof env c2All);
adam@2049 1231 if occursCon r c2All then
adam@2049 1232 maybeIsRecord c2
adam@2049 1233 else if f c2All then
adam@2049 1234 r := L'.Known c2All
adam@2049 1235 else
adam@2049 1236 err CScope)
adam@2049 1237 | (_, L'.CUnif (0, _, k2, _, r as ref (L'.Unknown f))) =>
adam@2049 1238 (unifyKinds env (kindof env c1All) k2;
adam@2049 1239 if occursCon r c1All then
adam@2049 1240 maybeIsRecord c1
adam@2049 1241 else if f c1All then
adam@2049 1242 r := L'.Known c1All
adam@2049 1243 else
adam@2049 1244 err CScope)
adam@2049 1245
adam@2049 1246 | (L'.CUnif (nl, _, k1, _, r as ref (L'.Unknown f)), _) =>
adamc@705 1247 if occursCon r c2All then
adam@2044 1248 maybeIsRecord c2
adamc@705 1249 else
adam@2049 1250 (unifyKinds env k1 (kindof env c2All);
adam@2049 1251 let
adam@1639 1252 val sq = squish nl c2All
adam@1639 1253 in
adam@1639 1254 if f sq then
adam@1639 1255 r := L'.Known sq
adam@1639 1256 else
adam@1639 1257 err CScope
adam@1639 1258 end
adam@1639 1259 handle CantSquish => err (fn _ => TooDeep))
adam@2049 1260 | (_, L'.CUnif (nl, _, k2, _, r as ref (L'.Unknown f))) =>
adamc@705 1261 if occursCon r c1All then
adam@2044 1262 maybeIsRecord c1
adamc@705 1263 else
adam@2049 1264 (unifyKinds env (kindof env c1All) k2;
adam@2049 1265 let
adam@1639 1266 val sq = squish nl c1All
adam@1639 1267 in
adam@1639 1268 if f sq then
adam@1639 1269 r := L'.Known sq
adam@1639 1270 else
adam@1639 1271 err CScope
adam@1639 1272 end
adam@1306 1273 handle CantSquish => err (fn _ => TooDeep))
adam@1304 1274
adam@2044 1275 | (L'.CRecord _, _) => isRecord ()
adam@2044 1276 | (_, L'.CRecord _) => isRecord ()
adam@2044 1277 | (L'.CConcat _, _) => isRecord ()
adam@2044 1278 | (_, L'.CConcat _) => isRecord ()
adam@2044 1279
adam@1341 1280
adamc@705 1281 | (L'.CUnit, L'.CUnit) => ()
adamc@705 1282
adamc@705 1283 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@987 1284 (unifyCons' env loc d1 d2;
adam@1639 1285 unifyCons' env loc r1 r2)
adamc@705 1286 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@705 1287 if expl1 <> expl2 then
adamc@705 1288 err CExplicitness
adamc@705 1289 else
adamc@705 1290 (unifyKinds env d1 d2;
adamc@705 1291 let
adamc@705 1292 (*val befor = Time.now ()*)
adamc@705 1293 val env' = E.pushCRel env x1 d1
adamc@705 1294 in
adamc@705 1295 (*TextIO.print ("E.pushCRel: "
adamc@705 1296 ^ LargeReal.toString (Time.toReal (Time.- (Time.now (), befor)))
adamc@705 1297 ^ "\n");*)
adamc@987 1298 unifyCons' env' loc r1 r2
adamc@705 1299 end)
adamc@987 1300 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' env loc r1 r2
adamc@705 1301 | (L'.TDisjoint (c1, d1, e1), L'.TDisjoint (c2, d2, e2)) =>
adamc@987 1302 (unifyCons' env loc c1 c2;
adamc@987 1303 unifyCons' env loc d1 d2;
adamc@987 1304 unifyCons' env loc e1 e2)
adamc@705 1305
adamc@705 1306 | (L'.CRel n1, L'.CRel n2) =>
adamc@705 1307 if n1 = n2 then
adamc@705 1308 ()
adamc@705 1309 else
adamc@705 1310 err CIncompatible
adamc@705 1311 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@705 1312 if n1 = n2 then
adamc@705 1313 ()
adamc@705 1314 else
adamc@705 1315 err CIncompatible
adamc@705 1316
adamc@705 1317 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@987 1318 (unifyCons' env loc d1 d2;
adamc@987 1319 unifyCons' env loc r1 r2)
adamc@705 1320 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@705 1321 (unifyKinds env k1 k2;
adamc@987 1322 unifyCons' (E.pushCRel env x1 k1) loc c1 c2)
adamc@705 1323
adamc@705 1324 | (L'.CName n1, L'.CName n2) =>
adamc@705 1325 if n1 = n2 then
adamc@705 1326 ()
adamc@705 1327 else
adamc@705 1328 err CIncompatible
adamc@705 1329
adamc@705 1330 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@705 1331 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@705 1332 ()
adamc@705 1333 else
adamc@705 1334 err CIncompatible
adamc@705 1335
adamc@705 1336 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@987 1337 ((ListPair.appEq (fn (c1, c2) => unifyCons' env loc c1 c2) (cs1, cs2))
adamc@705 1338 handle ListPair.UnequalLengths => err CIncompatible)
adamc@705 1339
adamc@706 1340 | (L'.CProj (c1, n1), _) => projSpecial1 (c1, n1, fn () => err CIncompatible)
adamc@706 1341 | (_, L'.CProj (c2, n2)) => projSpecial2 (c2, n2, fn () => err CIncompatible)
adamc@706 1342
adamc@623 1343 | (L'.CMap (dom1, ran1), L'.CMap (dom2, ran2)) =>
adamc@623 1344 (unifyKinds env dom1 dom2;
adamc@628 1345 unifyKinds env ran1 ran2)
adamc@623 1346
adamc@623 1347 | (L'.CKAbs (x, c1), L'.CKAbs (_, c2)) =>
adamc@987 1348 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@623 1349 | (L'.CKApp (c1, k1), L'.CKApp (c2, k2)) =>
adamc@623 1350 (unifyKinds env k1 k2;
adamc@987 1351 unifyCons' env loc c1 c2)
adamc@623 1352 | (L'.TKFun (x, c1), L'.TKFun (_, c2)) =>
adamc@987 1353 unifyCons' (E.pushKRel env x) loc c1 c2
adamc@628 1354
adam@1668 1355 | _ => err CIncompatible)(*;
adam@1668 1356 eprefaces "/unifyCons''" [("c1", p_con env c1All),
adam@1668 1357 ("c2", p_con env c2All)]*)
adamc@403 1358 end
adamc@403 1359
adamc@987 1360 and unifyCons env loc c1 c2 =
adamc@987 1361 unifyCons' env loc c1 c2
adam@1719 1362 handle CUnify' (env', err) => raise CUnify (c1, c2, env', err)
adam@1719 1363 | KUnify (arg as {3 = env', ...}) => raise CUnify (c1, c2, env', CKind arg)
adamc@403 1364
adamc@628 1365 fun checkCon env e c1 c2 =
adamc@987 1366 unifyCons env (#2 e) c1 c2
adam@1719 1367 handle CUnify (c1, c2, env', err) =>
adam@1719 1368 expError env (Unify (e, c1, c2, env', err))
adamc@628 1369
adamc@628 1370 fun checkPatCon env p c1 c2 =
adamc@987 1371 unifyCons env (#2 p) c1 c2
adam@1719 1372 handle CUnify (c1, c2, env', err) =>
adam@1719 1373 expError env (PatUnify (p, c1, c2, env', err))
adamc@71 1374
adamc@403 1375 fun primType env p =
adamc@403 1376 case p of
adamc@403 1377 P.Int _ => !int
adamc@403 1378 | P.Float _ => !float
adamc@403 1379 | P.String _ => !string
adamc@821 1380 | P.Char _ => !char
adamc@623 1381
adamc@403 1382 datatype constraint =
adamc@403 1383 Disjoint of D.goal
adamc@403 1384 | TypeClass of E.env * L'.con * L'.exp option ref * ErrorMsg.span
adamc@403 1385
adam@1591 1386 fun relocConstraint loc c =
adam@1591 1387 case c of
adam@1591 1388 Disjoint (_, a, b, c, d) => Disjoint (loc, a, b, c, d)
adam@1591 1389 | TypeClass (a, b, c, _) => TypeClass (a, b, c, loc)
adam@1591 1390
adamc@403 1391 val enD = map Disjoint
adamc@403 1392
adamc@634 1393 fun isClassOrFolder env cl =
adamc@634 1394 E.isClass env cl
adamc@634 1395 orelse case hnormCon env cl of
adamc@634 1396 (L'.CKApp (cl, _), _) =>
adamc@634 1397 (case hnormCon env cl of
adamc@634 1398 (L'.CModProj (top_n, [], "folder"), _) => top_n = !top_r
adamc@634 1399 | _ => false)
adamc@634 1400 | _ => false
adamc@634 1401
adam@1303 1402 fun subConInCon env x y =
adam@1303 1403 ElabOps.subConInCon x y
adam@1303 1404 handle SubUnif => (cunifyError env (TooUnify (#2 x, y));
adam@1303 1405 cerror)
adam@1303 1406
adamc@629 1407 fun elabHead (env, denv) infer (e as (_, loc)) t =
adamc@403 1408 let
adamc@898 1409 fun unravelKind (t, e) =
adamc@898 1410 case hnormCon env t of
adamc@898 1411 (L'.TKFun (x, t'), _) =>
adamc@898 1412 let
adam@1639 1413 val u = kunif env loc
adamc@898 1414
adamc@898 1415 val t'' = subKindInCon (0, u) t'
adamc@898 1416 in
adamc@898 1417 unravelKind (t'', (L'.EKApp (e, u), loc))
adamc@898 1418 end
adamc@898 1419 | t => (e, t, [])
adamc@898 1420
adamc@403 1421 fun unravel (t, e) =
adamc@628 1422 case hnormCon env t of
adamc@628 1423 (L'.TKFun (x, t'), _) =>
adamc@628 1424 let
adam@1639 1425 val u = kunif env loc
adamc@628 1426
adamc@628 1427 val t'' = subKindInCon (0, u) t'
adamc@628 1428 in
adamc@628 1429 unravel (t'', (L'.EKApp (e, u), loc))
adamc@628 1430 end
adamc@628 1431 | (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@628 1432 let
adam@1639 1433 val u = cunif env (loc, k)
adamc@628 1434
adam@1303 1435 val t'' = subConInCon env (0, u) t'
adamc@628 1436 in
adamc@628 1437 unravel (t'', (L'.ECApp (e, u), loc))
adamc@628 1438 end
adamc@633 1439 | (L'.TFun (dom, ran), _) =>
adamc@628 1440 let
adamc@633 1441 fun default () = (e, t, [])
adamc@750 1442
adamc@750 1443 fun isInstance () =
adamc@750 1444 if infer <> L.TypesOnly then
adamc@750 1445 let
adamc@750 1446 val r = ref NONE
adamc@750 1447 val (e, t, gs) = unravel (ran, (L'.EApp (e, (L'.EUnif r, loc)), loc))
adamc@750 1448 in
adamc@750 1449 (e, t, TypeClass (env, dom, r, loc) :: gs)
adamc@750 1450 end
adamc@750 1451 else
adamc@750 1452 default ()
adamc@750 1453
adamc@750 1454 fun hasInstance c =
adamc@753 1455 case hnormCon env c of
adamc@753 1456 (L'.TRecord c, _) => U.Con.exists {kind = fn _ => false,
adamc@753 1457 con = fn c =>
adam@1767 1458 isClassOrFolder env (hnormCon env (c, loc))} c
adamc@753 1459 | c =>
adamc@750 1460 let
adamc@753 1461 fun findHead c =
adamc@753 1462 case #1 c of
adamc@753 1463 L'.CApp (f, _) => findHead f
adamc@753 1464 | _ => c
adamc@753 1465
adamc@753 1466 val cl = hnormCon env (findHead c)
adamc@750 1467 in
adamc@750 1468 isClassOrFolder env cl
adamc@750 1469 end
adamc@628 1470 in
adamc@750 1471 if hasInstance dom then
adamc@750 1472 isInstance ()
adamc@750 1473 else
adamc@750 1474 default ()
adamc@628 1475 end
adamc@629 1476 | (L'.TDisjoint (r1, r2, t'), loc) =>
adamc@629 1477 if infer <> L.TypesOnly then
adamc@629 1478 let
adamc@792 1479 val gs = D.prove env denv (r1, r2, #2 e)
adamc@629 1480 val (e, t, gs') = unravel (t', e)
adamc@629 1481 in
adamc@629 1482 (e, t, enD gs @ gs')
adamc@629 1483 end
adamc@629 1484 else
adamc@629 1485 (e, t, [])
adamc@628 1486 | t => (e, t, [])
adam@1591 1487
adam@1591 1488 val (e, t, gs) = case infer of
adam@1591 1489 L.DontInfer => unravelKind (t, e)
adam@1591 1490 | _ => unravel (t, e)
adamc@704 1491 in
adam@1591 1492 ((#1 e, loc), (#1 t, loc), map (relocConstraint loc) gs)
adamc@704 1493 end
adamc@15 1494
adamc@628 1495 fun elabPat (pAll as (p, loc), (env, bound)) =
adamc@171 1496 let
adamc@171 1497 val perror = (L'.PWild, loc)
adamc@171 1498 val terror = (L'.CError, loc)
adamc@171 1499 val pterror = (perror, terror)
adamc@171 1500 val rerror = (pterror, (env, bound))
adamc@171 1501
adamc@191 1502 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1503 case (po, to) of
adamc@188 1504 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1505 rerror)
adamc@188 1506 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1507 rerror)
adamc@191 1508 | (NONE, NONE) =>
adamc@191 1509 let
adamc@191 1510 val k = (L'.KType, loc)
adam@1639 1511 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@191 1512 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1513 in
adamc@191 1514 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1515 (env, bound))
adamc@191 1516 end
adamc@188 1517 | (SOME p, SOME t) =>
adamc@188 1518 let
adamc@628 1519 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@191 1520
adamc@191 1521 val k = (L'.KType, loc)
adam@1639 1522 val unifs = map (fn _ => cunif env (loc, k)) xs
adamc@194 1523 val nxs = length unifs - 1
adam@1304 1524 val t = ListUtil.foldli (fn (i, u, t) => subConInCon env (nxs - i,
adam@1304 1525 E.mliftConInCon (nxs - i) u) t) t unifs
adamc@191 1526 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1527 in
adamc@628 1528 ignore (checkPatCon env p' pt t);
adamc@191 1529 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1530 (env, bound))
adamc@188 1531 end
adamc@171 1532 in
adamc@171 1533 case p of
adam@1639 1534 L.PWild => (((L'.PWild, loc), cunif env (loc, (L'.KType, loc))),
adamc@171 1535 (env, bound))
adamc@171 1536 | L.PVar x =>
adamc@171 1537 let
adamc@171 1538 val t = if SS.member (bound, x) then
adamc@171 1539 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1540 terror)
adamc@171 1541 else
adam@1639 1542 cunif env (loc, (L'.KType, loc))
adamc@171 1543 in
adamc@182 1544 (((L'.PVar (x, t), loc), t),
adamc@171 1545 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1546 end
adamc@173 1547 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1548 (env, bound))
adamc@171 1549 | L.PCon ([], x, po) =>
adamc@171 1550 (case E.lookupConstructor env x of
adamc@174 1551 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1552 rerror)
adamc@191 1553 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1554 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1555 (case E.lookupStr env m1 of
adamc@174 1556 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1557 rerror)
adamc@174 1558 | SOME (n, sgn) =>
adamc@174 1559 let
adamc@174 1560 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1561 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1562 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1563 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1564 ((L'.StrVar n, loc), sgn) ms
adamc@174 1565 in
adamc@174 1566 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1567 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1568 rerror)
adamc@191 1569 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1570 end)
adamc@174 1571
adamc@175 1572 | L.PRecord (xps, flex) =>
adamc@175 1573 let
adamc@175 1574 val (xpts, (env, bound, _)) =
adamc@175 1575 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1576 let
adamc@628 1577 val ((p', t), (env, bound)) = elabPat (p, (env, bound))
adamc@175 1578 in
adamc@175 1579 if SS.member (fbound, x) then
adamc@175 1580 expError env (DuplicatePatField (loc, x))
adamc@175 1581 else
adamc@175 1582 ();
adamc@175 1583 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1584 end)
adamc@175 1585 (env, bound, SS.empty) xps
adamc@175 1586
adamc@175 1587 val k = (L'.KType, loc)
adamc@175 1588 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1589 val c =
adamc@175 1590 if flex then
adam@1639 1591 (L'.CConcat (c, cunif env (loc, (L'.KRecord k, loc))), loc)
adamc@175 1592 else
adamc@176 1593 c
adamc@175 1594 in
adamc@182 1595 (((L'.PRecord xpts, loc),
adamc@175 1596 (L'.TRecord c, loc)),
adamc@175 1597 (env, bound))
adamc@175 1598 end
adamc@822 1599
adamc@822 1600 | L.PAnnot (p, t) =>
adamc@822 1601 let
adamc@822 1602 val ((p', pt), (env, bound)) = elabPat (p, (env, bound))
adamc@822 1603 val (t', k, _) = elabCon (env, D.empty) t
adamc@822 1604 in
adamc@822 1605 checkPatCon env p' pt t';
adamc@822 1606 ((p', t'), (env, bound))
adamc@822 1607 end
adamc@171 1608 end
adamc@171 1609
adamc@819 1610 (* This exhaustiveness checking follows Luc Maranget's paper "Warnings for pattern matching." *)
adamc@819 1611 fun exhaustive (env, t, ps, loc) =
adamc@819 1612 let
adamc@819 1613 fun fail n = raise Fail ("Elaborate.exhaustive: Impossible " ^ Int.toString n)
adamc@819 1614
adamc@819 1615 fun patConNum pc =
adamc@819 1616 case pc of
adamc@819 1617 L'.PConVar n => n
adamc@819 1618 | L'.PConProj (m1, ms, x) =>
adamc@819 1619 let
adamc@819 1620 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1621 in
adamc@819 1622 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@819 1623 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1624 | SOME (_, n, _, _, _) => n
adamc@819 1625 end
adamc@819 1626
adamc@819 1627 fun nameOfNum (t, n) =
adamc@819 1628 case t of
adamc@819 1629 L'.CModProj (m1, ms, x) =>
adamc@819 1630 let
adamc@819 1631 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1632 in
adamc@819 1633 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1634 NONE => raise Fail "exhaustive: Can't project datatype"
adamc@819 1635 | SOME (_, cons) =>
adamc@819 1636 case ListUtil.search (fn (name, n', _) =>
adamc@819 1637 if n' = n then
adamc@819 1638 SOME name
adamc@819 1639 else
adamc@819 1640 NONE) cons of
adamc@819 1641 NONE => fail 9
adamc@819 1642 | SOME name => L'.PConProj (m1, ms, name)
adamc@819 1643 end
adamc@819 1644 | _ => L'.PConVar n
adamc@819 1645
adamc@819 1646 fun S (args, c, P) =
adamc@819 1647 List.mapPartial
adamc@819 1648 (fn [] => fail 1
adamc@819 1649 | p1 :: ps =>
adamc@819 1650 let
adamc@819 1651 val loc = #2 p1
adamc@819 1652
adamc@819 1653 fun wild () =
adamc@819 1654 SOME (map (fn _ => (L'.PWild, loc)) args @ ps)
adamc@819 1655 in
adamc@819 1656 case #1 p1 of
adamc@819 1657 L'.PPrim _ => NONE
adamc@819 1658 | L'.PCon (_, c', _, NONE) =>
adamc@819 1659 if patConNum c' = c then
adamc@819 1660 SOME ps
adamc@819 1661 else
adamc@819 1662 NONE
adamc@819 1663 | L'.PCon (_, c', _, SOME p) =>
adamc@819 1664 if patConNum c' = c then
adamc@819 1665 SOME (p :: ps)
adamc@819 1666 else
adamc@819 1667 NONE
adamc@819 1668 | L'.PRecord xpts =>
adamc@819 1669 SOME (map (fn x =>
adamc@819 1670 case ListUtil.search (fn (x', p, _) =>
adamc@819 1671 if x = x' then
adamc@819 1672 SOME p
adamc@819 1673 else
adamc@819 1674 NONE) xpts of
adamc@819 1675 NONE => (L'.PWild, loc)
adamc@819 1676 | SOME p => p) args @ ps)
adamc@819 1677 | L'.PWild => wild ()
adamc@819 1678 | L'.PVar _ => wild ()
adamc@819 1679 end)
adamc@819 1680 P
adamc@819 1681
adamc@819 1682 fun D P =
adamc@819 1683 List.mapPartial
adamc@819 1684 (fn [] => fail 2
adamc@819 1685 | (p1, _) :: ps =>
adamc@819 1686 case p1 of
adamc@819 1687 L'.PWild => SOME ps
adamc@819 1688 | L'.PVar _ => SOME ps
adamc@819 1689 | L'.PPrim _ => NONE
adamc@819 1690 | L'.PCon _ => NONE
adamc@819 1691 | L'.PRecord _ => NONE)
adamc@819 1692 P
adamc@819 1693
adamc@819 1694 fun I (P, q) =
adamc@819 1695 (*(prefaces "I" [("P", p_list (fn P' => box [PD.string "[", p_list (p_pat env) P', PD.string "]"]) P),
adamc@819 1696 ("q", p_list (p_con env) q)];*)
adamc@819 1697 case q of
adamc@819 1698 [] => (case P of
adamc@819 1699 [] => SOME []
adamc@819 1700 | _ => NONE)
adamc@819 1701 | q1 :: qs =>
adamc@819 1702 let
adamc@819 1703 val loc = #2 q1
adamc@819 1704
adamc@819 1705 fun unapp (t, acc) =
adamc@830 1706 case #1 t of
adamc@830 1707 L'.CApp (t, arg) => unapp (t, arg :: acc)
adamc@819 1708 | _ => (t, rev acc)
adamc@819 1709
adamc@830 1710 val (t1, args) = unapp (hnormCon env q1, [])
adamc@830 1711 val t1 = hnormCon env t1
adam@1303 1712 fun doSub t = foldl (fn (arg, t) => subConInCon env (0, arg) t) t args
adamc@819 1713
adamc@819 1714 fun dtype (dtO, names) =
adamc@819 1715 let
adamc@819 1716 val nameSet = IS.addList (IS.empty, names)
adamc@819 1717 val nameSet = foldl (fn (ps, nameSet) =>
adamc@819 1718 case ps of
adamc@819 1719 [] => fail 4
adamc@819 1720 | (L'.PCon (_, pc, _, _), _) :: _ =>
adamc@819 1721 (IS.delete (nameSet, patConNum pc)
adamc@819 1722 handle NotFound => nameSet)
adamc@819 1723 | _ => nameSet)
adamc@819 1724 nameSet P
adamc@819 1725 in
adamc@819 1726 nameSet
adamc@819 1727 end
adamc@819 1728
adamc@819 1729 fun default () = (NONE, IS.singleton 0, [])
adamc@819 1730
adamc@819 1731 val (dtO, unused, cons) =
adamc@830 1732 case #1 t1 of
adamc@819 1733 L'.CNamed n =>
adamc@819 1734 let
adamc@819 1735 val dt = E.lookupDatatype env n
adamc@819 1736 val cons = E.constructors dt
adamc@819 1737 in
adamc@819 1738 (SOME dt,
adamc@819 1739 dtype (SOME dt, map #2 cons),
adamc@819 1740 map (fn (_, n, co) =>
adamc@819 1741 (n,
adamc@819 1742 case co of
adamc@819 1743 NONE => []
adamc@819 1744 | SOME t => [("", doSub t)])) cons)
adamc@819 1745 end
adamc@819 1746 | L'.CModProj (m1, ms, x) =>
adamc@819 1747 let
adamc@819 1748 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@819 1749 in
adamc@819 1750 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@819 1751 NONE => default ()
adamc@819 1752 | SOME (_, cons) =>
adamc@819 1753 (NONE,
adamc@819 1754 dtype (NONE, map #2 cons),
adamc@819 1755 map (fn (s, _, co) =>
adamc@819 1756 (patConNum (L'.PConProj (m1, ms, s)),
adamc@819 1757 case co of
adamc@819 1758 NONE => []
adamc@819 1759 | SOME t => [("", doSub t)])) cons)
adamc@819 1760 end
adamc@830 1761 | L'.TRecord t =>
adamc@830 1762 (case #1 (hnormCon env t) of
adamc@830 1763 L'.CRecord (_, xts) =>
adamc@830 1764 let
adamc@830 1765 val xts = map (fn ((L'.CName x, _), co) => SOME (x, co)
adamc@830 1766 | _ => NONE) xts
adamc@830 1767 in
adamc@830 1768 if List.all Option.isSome xts then
adamc@830 1769 let
adamc@830 1770 val xts = List.mapPartial (fn x => x) xts
adamc@830 1771 val xts = ListMergeSort.sort (fn ((x1, _), (x2, _)) =>
adamc@830 1772 String.compare (x1, x2) = GREATER) xts
adamc@830 1773 in
adamc@830 1774 (NONE, IS.empty, [(0, xts)])
adamc@830 1775 end
adamc@830 1776 else
adamc@830 1777 default ()
adamc@830 1778 end
adamc@830 1779 | _ => default ())
adamc@819 1780 | _ => default ()
adamc@819 1781 in
adamc@819 1782 if IS.isEmpty unused then
adamc@819 1783 let
adamc@819 1784 fun recurse cons =
adamc@819 1785 case cons of
adamc@819 1786 [] => NONE
adamc@819 1787 | (name, args) :: cons =>
adamc@819 1788 case I (S (map #1 args, name, P),
adamc@819 1789 map #2 args @ qs) of
adamc@819 1790 NONE => recurse cons
adamc@819 1791 | SOME ps =>
adamc@819 1792 let
adamc@819 1793 val nargs = length args
adamc@819 1794 val argPs = List.take (ps, nargs)
adamc@819 1795 val restPs = List.drop (ps, nargs)
adamc@819 1796
adamc@819 1797 val p = case name of
adamc@819 1798 0 => L'.PRecord (ListPair.map
adamc@819 1799 (fn ((name, t), p) => (name, p, t))
adamc@819 1800 (args, argPs))
adamc@830 1801 | _ => L'.PCon (L'.Default, nameOfNum (#1 t1, name), [],
adamc@819 1802 case argPs of
adamc@819 1803 [] => NONE
adamc@819 1804 | [p] => SOME p
adamc@819 1805 | _ => fail 3)
adamc@819 1806 in
adamc@819 1807 SOME ((p, loc) :: restPs)
adamc@819 1808 end
adamc@819 1809 in
adamc@819 1810 recurse cons
adamc@819 1811 end
adamc@819 1812 else
adamc@819 1813 case I (D P, qs) of
adamc@819 1814 NONE => NONE
adamc@819 1815 | SOME ps =>
adamc@819 1816 let
adamc@819 1817 val p = case cons of
adamc@819 1818 [] => L'.PWild
adamc@819 1819 | (0, _) :: _ => L'.PWild
adamc@819 1820 | _ =>
adamc@819 1821 case IS.find (fn _ => true) unused of
adamc@819 1822 NONE => fail 6
adamc@819 1823 | SOME name =>
adamc@819 1824 case ListUtil.search (fn (name', args) =>
adamc@819 1825 if name = name' then
adamc@819 1826 SOME (name', args)
adamc@819 1827 else
adamc@819 1828 NONE) cons of
adamc@819 1829 SOME (n, []) =>
adamc@830 1830 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], NONE)
adamc@819 1831 | SOME (n, [_]) =>
adamc@830 1832 L'.PCon (L'.Default, nameOfNum (#1 t1, n), [], SOME (L'.PWild, loc))
adamc@819 1833 | _ => fail 7
adamc@819 1834 in
adamc@819 1835 SOME ((p, loc) :: ps)
adamc@819 1836 end
adamc@819 1837 end
adamc@819 1838 in
adamc@819 1839 case I (map (fn x => [x]) ps, [t]) of
adamc@819 1840 NONE => NONE
adamc@819 1841 | SOME [p] => SOME p
adamc@819 1842 | _ => fail 7
adamc@819 1843 end
adamc@819 1844
adamc@217 1845 fun unmodCon env (c, loc) =
adamc@217 1846 case c of
adamc@217 1847 L'.CNamed n =>
adamc@217 1848 (case E.lookupCNamed env n of
adamc@217 1849 (_, _, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1850 | _ => (c, loc))
adamc@217 1851 | L'.CModProj (m1, ms, x) =>
adamc@217 1852 let
adamc@217 1853 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@217 1854 in
adamc@217 1855 case E.projectCon env {str = str, sgn = sgn, field = x} of
adamc@217 1856 NONE => raise Fail "unmodCon: Can't projectCon"
adamc@217 1857 | SOME (_, SOME (c as (L'.CModProj _, _))) => unmodCon env c
adamc@217 1858 | _ => (c, loc)
adamc@217 1859 end
adamc@217 1860 | _ => (c, loc)
adamc@217 1861
adamc@721 1862 fun normClassKey env c =
adamc@467 1863 let
adamc@721 1864 val c = hnormCon env c
adamc@467 1865 in
adamc@467 1866 case #1 c of
adamc@467 1867 L'.CApp (c1, c2) =>
adamc@467 1868 let
adamc@721 1869 val c1 = normClassKey env c1
adamc@721 1870 val c2 = normClassKey env c2
adamc@467 1871 in
adamc@467 1872 (L'.CApp (c1, c2), #2 c)
adamc@467 1873 end
adamc@721 1874 | L'.CRecord (k, xcs) => (L'.CRecord (k, map (fn (x, c) => (normClassKey env x,
adamc@721 1875 normClassKey env c)) xcs), #2 c)
adamc@721 1876 | _ => unmodCon env c
adamc@467 1877 end
adamc@467 1878
adamc@467 1879 fun normClassConstraint env (c, loc) =
adamc@217 1880 case c of
adamc@217 1881 L'.CApp (f, x) =>
adamc@217 1882 let
adamc@721 1883 val f = normClassKey env f
adamc@467 1884 val x = normClassKey env x
adamc@217 1885 in
adamc@467 1886 (L'.CApp (f, x), loc)
adamc@217 1887 end
adamc@674 1888 | L'.TFun (c1, c2) =>
adamc@674 1889 let
adamc@674 1890 val c1 = normClassConstraint env c1
adamc@674 1891 val c2 = normClassConstraint env c2
adamc@674 1892 in
adamc@674 1893 (L'.TFun (c1, c2), loc)
adamc@674 1894 end
adamc@674 1895 | L'.TCFun (expl, x, k, c1) => (L'.TCFun (expl, x, k, normClassConstraint env c1), loc)
adam@1639 1896 | L'.CUnif (nl, _, _, _, ref (L'.Known c)) => normClassConstraint env (E.mliftConInCon nl c)
adamc@721 1897 | _ => unmodCon env (c, loc)
adamc@216 1898
adamc@1093 1899 fun findHead e e' =
adamc@1093 1900 let
adamc@1093 1901 fun findHead (e, _) =
adamc@1093 1902 case e of
adamc@1093 1903 L.EVar (_, _, infer) =>
adamc@1093 1904 let
adamc@1093 1905 fun findHead' (e, _) =
adamc@1093 1906 case e of
adamc@1093 1907 L'.ENamed _ => true
adamc@1093 1908 | L'.EModProj _ => true
adam@1472 1909 | L'.ERel _ => true
adamc@1093 1910 | L'.EApp (e, _) => findHead' e
adamc@1093 1911 | L'.ECApp (e, _) => findHead' e
adamc@1093 1912 | L'.EKApp (e, _) => findHead' e
adamc@1093 1913 | _ => false
adamc@1093 1914 in
adamc@1093 1915 if findHead' e' then
adamc@1093 1916 SOME infer
adamc@1093 1917 else
adamc@1093 1918 NONE
adamc@1093 1919 end
adamc@1093 1920 | L.EApp (e, _) => findHead e
adamc@1093 1921 | L.ECApp (e, _) => findHead e
adamc@1093 1922 | L.EDisjointApp e => findHead e
adamc@1093 1923 | _ => NONE
adamc@1093 1924 in
adamc@1093 1925 findHead e
adamc@1093 1926 end
adamc@1093 1927
adam@1640 1928 datatype needed = Needed of {Cons : (L'.kind * int) SM.map,
adam@1640 1929 NextCon : int,
adamc@1264 1930 Constraints : (E.env * (L'.con * L'.con) * ErrorMsg.span) list,
adamc@1264 1931 Vals : SS.set,
adamc@1270 1932 Mods : (E.env * needed) SM.map}
adamc@1264 1933
adam@1640 1934 fun ncons (Needed r) = map (fn (k, (v, _)) => (k, v))
adam@1640 1935 (ListMergeSort.sort (fn ((_, (_, n1)), (_, (_, n2))) => n1 > n2)
adam@1640 1936 (SM.listItemsi (#Cons r)))
adamc@1264 1937 fun nconstraints (Needed r) = #Constraints r
adamc@1264 1938 fun nvals (Needed r) = #Vals r
adamc@1264 1939 fun nmods (Needed r) = #Mods r
adamc@1264 1940
adamc@1264 1941 val nempty = Needed {Cons = SM.empty,
adam@1640 1942 NextCon = 0,
adamc@1264 1943 Constraints = nil,
adamc@1264 1944 Vals = SS.empty,
adamc@1264 1945 Mods = SM.empty}
adamc@1264 1946
adamc@1264 1947 fun naddCon (r : needed, k, v) =
adamc@1264 1948 let
adamc@1264 1949 val Needed r = r
adamc@1264 1950 in
adam@1640 1951 Needed {Cons = SM.insert (#Cons r, k, (v, #NextCon r)),
adam@1640 1952 NextCon = #NextCon r + 1,
adamc@1264 1953 Constraints = #Constraints r,
adamc@1264 1954 Vals = #Vals r,
adamc@1264 1955 Mods = #Mods r}
adamc@1264 1956 end
adamc@1264 1957
adamc@1264 1958 fun naddConstraint (r : needed, v) =
adamc@1264 1959 let
adamc@1264 1960 val Needed r = r
adamc@1264 1961 in
adamc@1264 1962 Needed {Cons = #Cons r,
adam@1640 1963 NextCon = #NextCon r,
adamc@1264 1964 Constraints = v :: #Constraints r,
adamc@1264 1965 Vals = #Vals r,
adamc@1264 1966 Mods = #Mods r}
adamc@1264 1967 end
adamc@1264 1968
adamc@1264 1969 fun naddVal (r : needed, k) =
adamc@1264 1970 let
adamc@1264 1971 val Needed r = r
adamc@1264 1972 in
adamc@1264 1973 Needed {Cons = #Cons r,
adam@1640 1974 NextCon = #NextCon r,
adamc@1264 1975 Constraints = #Constraints r,
adamc@1264 1976 Vals = SS.add (#Vals r, k),
adamc@1264 1977 Mods = #Mods r}
adamc@1264 1978 end
adamc@1264 1979
adamc@1264 1980 fun naddMod (r : needed, k, v) =
adamc@1264 1981 let
adamc@1264 1982 val Needed r = r
adamc@1264 1983 in
adamc@1264 1984 Needed {Cons = #Cons r,
adam@1640 1985 NextCon = #NextCon r,
adamc@1264 1986 Constraints = #Constraints r,
adamc@1264 1987 Vals = #Vals r,
adamc@1264 1988 Mods = SM.insert (#Mods r, k, v)}
adamc@1264 1989 end
adamc@1264 1990
adamc@1264 1991 fun ndelCon (r : needed, k) =
adamc@1264 1992 let
adamc@1264 1993 val Needed r = r
adamc@1264 1994 in
adamc@1264 1995 Needed {Cons = #1 (SM.remove (#Cons r, k)) handle NotFound => #Cons r,
adam@1640 1996 NextCon = #NextCon r,
adamc@1264 1997 Constraints = #Constraints r,
adamc@1264 1998 Vals = #Vals r,
adamc@1264 1999 Mods = #Mods r}
adamc@1264 2000 end
adamc@1264 2001
adamc@1264 2002 fun ndelVal (r : needed, k) =
adamc@1264 2003 let
adamc@1264 2004 val Needed r = r
adamc@1264 2005 in
adamc@1264 2006 Needed {Cons = #Cons r,
adam@1640 2007 NextCon = #NextCon r,
adamc@1264 2008 Constraints = #Constraints r,
adamc@1264 2009 Vals = SS.delete (#Vals r, k) handle NotFound => #Vals r,
adamc@1264 2010 Mods = #Mods r}
adamc@1264 2011 end
adamc@1264 2012
adam@1591 2013 fun chaseUnifs c =
adam@1591 2014 case #1 c of
adam@1639 2015 L'.CUnif (_, _, _, _, ref (L'.Known c)) => chaseUnifs c
adam@1591 2016 | _ => c
adam@1591 2017
adamc@92 2018 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 2019 let
adamc@848 2020 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 2021 (*val befor = Time.now ()*)
adamc@280 2022
adamc@280 2023 val r = case e of
adamc@91 2024 L.EAnnot (e, t) =>
adamc@91 2025 let
adamc@91 2026 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 2027 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 2028 in
adamc@628 2029 checkCon env e' et t';
adamc@628 2030 (e', t', gs1 @ enD gs2)
adamc@91 2031 end
adamc@34 2032
adamc@91 2033 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 2034 | L.EVar ([], s, infer) =>
adamc@91 2035 (case E.lookupE env s of
adamc@91 2036 E.NotBound =>
adamc@91 2037 (expError env (UnboundExp (loc, s));
adamc@91 2038 (eerror, cerror, []))
adamc@629 2039 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 2040 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 2041 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 2042 (case E.lookupStr env m1 of
adamc@91 2043 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 2044 (eerror, cerror, []))
adamc@91 2045 | SOME (n, sgn) =>
adamc@91 2046 let
adamc@91 2047 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 2048 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 2049 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 2050 (strerror, sgnerror))
adamc@91 2051 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 2052 ((L'.StrVar n, loc), sgn) ms
adamc@10 2053
adamc@91 2054 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 2055 NONE => (expError env (UnboundExp (loc, s));
adamc@91 2056 cerror)
adamc@91 2057 | SOME t => t
adamc@91 2058 in
adamc@629 2059 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 2060 end)
adamc@86 2061
adamc@349 2062 | L.EWild =>
adamc@210 2063 let
adamc@349 2064 val r = ref NONE
adam@1639 2065 val c = cunif env (loc, (L'.KType, loc))
adamc@210 2066 in
adamc@349 2067 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 2068 end
adamc@210 2069
adamc@91 2070 | L.EApp (e1, e2) =>
adamc@91 2071 let
adamc@91 2072 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093 2073
adamc@403 2074 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 2075
adam@1639 2076 val dom = cunif env (loc, ktype)
adam@1639 2077 val ran = cunif env (loc, ktype)
adamc@838 2078 val t = (L'.TFun (dom, ran), loc)
adamc@1093 2079
adamc@1093 2080 val () = checkCon env e1' t1 t
adamc@1093 2081 val () = checkCon env e2' t2 dom
adamc@1093 2082
adamc@1093 2083 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093 2084 val (ef, et, gs3) =
adamc@1093 2085 case findHead e1 e1' of
adam@1591 2086 NONE => (ef, (#1 (chaseUnifs ran), loc), [])
adamc@1093 2087 | SOME infer => elabHead (env, denv) infer ef ran
adamc@91 2088 in
adamc@1093 2089 (ef, et, gs1 @ gs2 @ gs3)
adamc@91 2090 end
adamc@91 2091 | L.EAbs (x, to, e) =>
adamc@91 2092 let
adamc@91 2093 val (t', gs1) = case to of
adam@1639 2094 NONE => (cunif env (loc, ktype), [])
adamc@91 2095 | SOME t =>
adamc@91 2096 let
adamc@91 2097 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 2098 in
adamc@91 2099 checkKind env t' tk ktype;
adamc@91 2100 (t', gs)
adamc@91 2101 end
adamc@467 2102 val dom = normClassConstraint env t'
adamc@467 2103 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 2104 in
adamc@91 2105 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 2106 (L'.TFun (t', et), loc),
adamc@467 2107 enD gs1 @ gs2)
adamc@91 2108 end
adamc@91 2109 | L.ECApp (e, c) =>
adamc@91 2110 let
adamc@91 2111 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093 2112
adamc@328 2113 val oldEt = et
adamc@403 2114 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 2115 val (et', _) = hnormCon env et
adamc@91 2116 in
adamc@91 2117 case et' of
adamc@91 2118 L'.CError => (eerror, cerror, [])
adamc@328 2119 | L'.TCFun (_, x, k, eb) =>
adamc@91 2120 let
adamc@91 2121 val () = checkKind env c' ck k
adam@1303 2122 val eb' = subConInCon env (0, c') eb
adamc@1093 2123
adamc@1093 2124 val ef = (L'.ECApp (e', c'), loc)
adamc@1093 2125 val (ef, eb', gs3) =
adamc@1093 2126 case findHead e e' of
adamc@1093 2127 NONE => (ef, eb', [])
adamc@1093 2128 | SOME infer => elabHead (env, denv) infer ef eb'
adamc@91 2129 in
adamc@328 2130 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 2131 ("et", p_con env oldEt),
adamc@328 2132 ("x", PD.string x),
adamc@328 2133 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 2134 ("c", p_con env c'),
adamc@328 2135 ("eb'", p_con env eb')];*)
adam@1591 2136 (ef, (#1 eb', loc), gs1 @ enD gs2 @ gs3)
adamc@91 2137 end
adamc@91 2138
adamc@91 2139 | _ =>
adamc@91 2140 (expError env (WrongForm ("constructor function", e', et));
adamc@91 2141 (eerror, cerror, []))
adamc@91 2142 end
adamc@91 2143 | L.ECAbs (expl, x, k, e) =>
adamc@91 2144 let
adamc@91 2145 val expl' = elabExplicitness expl
adamc@623 2146 val k' = elabKind env k
adamc@328 2147
adamc@328 2148 val env' = E.pushCRel env x k'
adamc@328 2149 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 2150 in
adamc@91 2151 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 2152 (L'.TCFun (expl', x, k', et), loc),
adamc@91 2153 gs)
adamc@91 2154 end
adamc@623 2155 | L.EKAbs (x, e) =>
adamc@623 2156 let
adamc@623 2157 val env' = E.pushKRel env x
adamc@623 2158 val (e', et, gs) = elabExp (env', denv) e
adamc@623 2159 in
adamc@623 2160 ((L'.EKAbs (x, e'), loc),
adamc@623 2161 (L'.TKFun (x, et), loc),
adamc@623 2162 gs)
adamc@623 2163 end
adamc@91 2164
adamc@91 2165 | L.EDisjoint (c1, c2, e) =>
adamc@91 2166 let
adamc@91 2167 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 2168 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 2169
adam@1639 2170 val ku1 = kunif env loc
adam@1639 2171 val ku2 = kunif env loc
adamc@91 2172
adamc@628 2173 val denv' = D.assert env denv (c1', c2')
adamc@628 2174 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 2175 in
adamc@91 2176 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 2177 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 2178
adamc@628 2179 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 2180 end
adamc@629 2181 | L.EDisjointApp e =>
adamc@629 2182 let
adamc@629 2183 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 2184
adam@1639 2185 val k1 = kunif env loc
adam@1639 2186 val c1 = cunif env (loc, (L'.KRecord k1, loc))
adam@1639 2187 val k2 = kunif env loc
adam@1639 2188 val c2 = cunif env (loc, (L'.KRecord k2, loc))
adam@1639 2189 val t' = cunif env (loc, ktype)
adamc@629 2190 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 2191 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 2192 in
adam@1591 2193 (e', (#1 (chaseUnifs t'), loc), enD gs2 @ gs1)
adamc@629 2194 end
adamc@91 2195
adam@2009 2196 | L.ERecord (xes, flex) =>
adamc@91 2197 let
adam@2009 2198 val () = if flex then
adam@2009 2199 expError env (IllegalFlex eAll)
adam@2009 2200 else
adam@2009 2201 ()
adam@2009 2202
adamc@91 2203 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 2204 let
adamc@91 2205 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 2206 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 2207 in
adamc@91 2208 checkKind env x' xk kname;
adamc@228 2209 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 2210 end)
adamc@91 2211 [] xes
adamc@91 2212
adamc@91 2213 val k = (L'.KType, loc)
adamc@91 2214
adamc@91 2215 fun prove (xets, gs) =
adamc@91 2216 case xets of
adamc@91 2217 [] => gs
adamc@91 2218 | (x, _, t) :: rest =>
adamc@91 2219 let
adamc@91 2220 val xc = (x, t)
adamc@91 2221 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 2222 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 2223 let
adamc@91 2224 val xc' = (x', t')
adamc@91 2225 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 2226 in
adamc@91 2227 D.prove env denv (r1, r2, loc) @ gs
adamc@91 2228 end)
adamc@91 2229 gs rest
adamc@91 2230 in
adamc@91 2231 prove (rest, gs)
adamc@91 2232 end
adamc@228 2233
adamc@228 2234 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 2235 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 2236 in
adamc@255 2237 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 2238 ((L'.ERecord xes', loc),
adamc@91 2239 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 2240 enD (prove (xes', gsD)) @ gsO)
adamc@91 2241 end
adamc@91 2242
adamc@91 2243 | L.EField (e, c) =>
adamc@91 2244 let
adamc@91 2245 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 2246 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 2247
adam@1639 2248 val ft = cunif env (loc, ktype)
adam@1639 2249 val rest = cunif env (loc, ktype_record)
adamc@91 2250 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2251 val () = checkCon env e' et
adamc@629 2252 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 2253 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 2254 in
adamc@628 2255 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 2256 end
adamc@91 2257
adamc@445 2258 | L.EConcat (e1, e2) =>
adamc@339 2259 let
adamc@339 2260 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 2261 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 2262
adam@1639 2263 val r1 = cunif env (loc, ktype_record)
adam@1639 2264 val r2 = cunif env (loc, ktype_record)
adamc@445 2265
adamc@629 2266 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 2267 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 2268
adamc@628 2269 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 2270 in
adamc@445 2271 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 2272 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 2273 gs1 @ gs2 @ enD gs3)
adamc@339 2274 end
adamc@149 2275 | L.ECut (e, c) =>
adamc@149 2276 let
adamc@149 2277 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 2278 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 2279
adam@1639 2280 val ft = cunif env (loc, ktype)
adam@1639 2281 val rest = cunif env (loc, ktype_record)
adamc@149 2282 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2283
adamc@629 2284 val () = checkCon env e' et
adamc@629 2285 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 2286
adamc@628 2287 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 2288 in
adam@1299 2289 checkKind env c' ck kname;
adamc@228 2290 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2291 gs1 @ enD gs2 @ enD gs3)
adamc@149 2292 end
adamc@493 2293 | L.ECutMulti (e, c) =>
adamc@493 2294 let
adamc@493 2295 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 2296 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 2297
adam@1639 2298 val rest = cunif env (loc, ktype_record)
adamc@629 2299
adamc@629 2300 val () = checkCon env e' et
adamc@629 2301 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 2302
adamc@628 2303 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 2304 in
adam@1299 2305 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493 2306 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2307 gs1 @ enD gs2 @ enD gs3)
adamc@493 2308 end
adamc@149 2309
adamc@171 2310 | L.ECase (e, pes) =>
adamc@171 2311 let
adamc@171 2312 val (e', et, gs1) = elabExp (env, denv) e
adam@1639 2313 val result = cunif env (loc, (L'.KType, loc))
adamc@171 2314 val (pes', gs) = ListUtil.foldlMap
adamc@171 2315 (fn ((p, e), gs) =>
adamc@171 2316 let
adamc@628 2317 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 2318
adamc@629 2319 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 2320 in
adamc@628 2321 checkPatCon env p' pt et;
adamc@629 2322 checkCon env e' et' result;
adamc@628 2323 ((p', e'), gs1 @ gs)
adamc@171 2324 end)
adamc@171 2325 gs1 pes
adamc@171 2326 in
adamc@819 2327 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 2328 NONE => ()
adamc@830 2329 | SOME p => if !mayDelay then
adamc@830 2330 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 2331 else
adamc@830 2332 expError env (Inexhaustive (loc, p));
adamc@172 2333
adamc@628 2334 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 2335 end
adamc@447 2336
adamc@447 2337 | L.ELet (eds, e) =>
adamc@447 2338 let
adamc@447 2339 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 2340 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 2341 in
adamc@825 2342 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 2343 end
adamc@280 2344 in
adamc@819 2345 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 2346 r
adamc@91 2347 end
adamc@31 2348
adamc@628 2349 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 2350 let
adamc@447 2351 val r =
adamc@447 2352 case d of
adamc@825 2353 L.EDVal (p, e) =>
adamc@447 2354 let
adamc@825 2355 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 2356 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 2357
adamc@825 2358 val () = checkCon env e' et pt
adamc@825 2359
adam@1554 2360 val env' = E.patBinds env p'
adam@1554 2361 (* Redo to get proper detection of type class witnesses *)
adam@1554 2362
adamc@825 2363 val pt = normClassConstraint env pt
adamc@447 2364 in
adamc@830 2365 case exhaustive (env, et, [p'], loc) of
adamc@830 2366 NONE => ()
adamc@830 2367 | SOME p => if !mayDelay then
adamc@830 2368 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 2369 else
adamc@830 2370 expError env (Inexhaustive (loc, p));
adamc@830 2371
adamc@825 2372 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 2373 end
adamc@447 2374 | L.EDValRec vis =>
adamc@447 2375 let
adamc@447 2376 fun allowable (e, _) =
adamc@447 2377 case e of
adamc@447 2378 L.EAbs _ => true
adamc@447 2379 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 2380 | L.EKAbs (_, e) => allowable e
adamc@447 2381 | L.EDisjoint (_, _, e) => allowable e
adamc@447 2382 | _ => false
adamc@447 2383
adamc@447 2384 val (vis, gs) = ListUtil.foldlMap
adamc@447 2385 (fn ((x, co, e), gs) =>
adamc@447 2386 let
adamc@447 2387 val (c', _, gs1) = case co of
adam@1639 2388 NONE => (cunif env (loc, ktype), ktype, [])
adamc@447 2389 | SOME c => elabCon (env, denv) c
adamc@447 2390 in
adamc@447 2391 ((x, c', e), enD gs1 @ gs)
adamc@447 2392 end) gs vis
adamc@447 2393
adamc@447 2394 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 2395
adamc@447 2396 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 2397 let
adamc@447 2398 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 2399 in
adamc@628 2400 checkCon env e' et c';
adamc@447 2401 if allowable e then
adamc@447 2402 ()
adamc@447 2403 else
adamc@447 2404 expError env (IllegalRec (x, e'));
adamc@628 2405 ((x, c', e'), gs1 @ gs)
adamc@447 2406 end) gs vis
adamc@447 2407 in
adamc@447 2408 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 2409 end
adamc@447 2410 in
adamc@447 2411 r
adamc@447 2412 end
adamc@447 2413
adamc@42 2414 val hnormSgn = E.hnormSgn
adamc@31 2415
adamc@210 2416 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 2417 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 2418 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2419 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2420 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2421 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2422
adamc@469 2423 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2424 case E.lookupStr env str of
adamc@469 2425 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2426 denv)
adamc@469 2427 | SOME (n, sgn) =>
adamc@469 2428 let
adamc@469 2429 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2430 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2431 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2432 (strerror, sgnerror))
adamc@469 2433 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2434 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2435
adamc@1030 2436 fun collect first (st, sgn) =
adamc@1030 2437 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182 2438 NONE => []
adamc@1030 2439 | SOME cs =>
adamc@1030 2440 case #1 (hnormSgn env sgn) of
adamc@1030 2441 L'.SgnConst sgis =>
adamc@1030 2442 foldl (fn (sgi, cs) =>
adamc@1030 2443 case #1 sgi of
adamc@1030 2444 L'.SgiStr (x, _, _) =>
adamc@1030 2445 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2446 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2447 | SOME sgn' =>
adamc@1030 2448 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2449 cs))
adamc@1030 2450 | _ => cs) cs sgis
adamc@1030 2451 | _ => cs
adamc@469 2452 in
adamc@1030 2453 foldl (fn ((c1, c2), denv) =>
adamc@1030 2454 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2455 end
adamc@469 2456
adamc@88 2457 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270 2458 ((*Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));*)
adamc@1270 2459 case sgi of
adamc@1270 2460 L.SgiConAbs (x, k) =>
adamc@1270 2461 let
adamc@1270 2462 val k' = elabKind env k
adamc@1270 2463
adamc@1270 2464 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270 2465 in
adamc@1270 2466 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270 2467 end
adamc@1270 2468
adamc@1270 2469 | L.SgiCon (x, ko, c) =>
adamc@1270 2470 let
adamc@1270 2471 val k' = case ko of
adam@1639 2472 NONE => kunif env loc
adamc@1270 2473 | SOME k => elabKind env k
adamc@1270 2474
adamc@1270 2475 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2476 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270 2477 in
adamc@1270 2478 checkKind env c' ck k';
adamc@1270 2479
adamc@1270 2480 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2481 end
adamc@1270 2482
adamc@1270 2483 | L.SgiDatatype dts =>
adamc@1270 2484 let
adamc@1270 2485 val k = (L'.KType, loc)
adamc@1270 2486
adamc@1270 2487 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270 2488 let
adamc@1270 2489 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2490 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270 2491 in
adamc@1270 2492 ((x, n, xs, xcs), env)
adamc@1270 2493 end)
adamc@1270 2494 env dts
adamc@1270 2495
adamc@1270 2496 val (dts, env) = ListUtil.foldlMap
adamc@1270 2497 (fn ((x, n, xs, xcs), env) =>
adamc@1270 2498 let
adamc@1270 2499 val t = (L'.CNamed n, loc)
adamc@1270 2500 val nxs = length xs - 1
adamc@1270 2501 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270 2502 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270 2503
adamc@1270 2504 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270 2505 (E.pushCRel env' x k,
adamc@1270 2506 D.enter denv')) (env, denv) xs
adamc@1270 2507
adamc@1270 2508 val (xcs, (used, env, gs)) =
adamc@1270 2509 ListUtil.foldlMap
adamc@1270 2510 (fn ((x, to), (used, env, gs)) =>
adamc@1270 2511 let
adamc@1270 2512 val (to, t, gs') = case to of
adamc@1270 2513 NONE => (NONE, t, gs)
adamc@1270 2514 | SOME t' =>
adamc@1270 2515 let
adamc@1270 2516 val (t', tk, gs') =
adamc@1270 2517 elabCon (env', denv') t'
adamc@1270 2518 in
adamc@1270 2519 checkKind env' t' tk k;
adamc@1270 2520 (SOME t',
adamc@1270 2521 (L'.TFun (t', t), loc),
adamc@1270 2522 gs' @ gs)
adamc@1270 2523 end
adamc@1270 2524 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2525 t xs
adamc@1270 2526
adamc@1270 2527 val (env, n') = E.pushENamed env x t
adamc@1270 2528 in
adamc@1270 2529 if SS.member (used, x) then
adamc@1270 2530 strError env (DuplicateConstructor (x, loc))
adamc@1270 2531 else
adamc@1270 2532 ();
adamc@1270 2533 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270 2534 end)
adamc@1270 2535 (SS.empty, env, []) xcs
adamc@1270 2536 in
adamc@1270 2537 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270 2538 end)
adamc@1270 2539 env dts
adamc@1270 2540 in
adamc@1270 2541 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270 2542 end
adamc@1270 2543
adamc@1270 2544 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270 2545
adamc@1270 2546 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270 2547 (case E.lookupStr env m1 of
adamc@1270 2548 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270 2549 ([], (env, denv, gs)))
adamc@1270 2550 | SOME (n, sgn) =>
adamc@1270 2551 let
adamc@1270 2552 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270 2553 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270 2554 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270 2555 (strerror, sgnerror))
adamc@1270 2556 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270 2557 ((L'.StrVar n, loc), sgn) ms
adamc@1270 2558 in
adamc@1270 2559 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270 2560 (L'.CModProj (n, ms, s), _) =>
adamc@1270 2561 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270 2562 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270 2563 ([], (env, denv, [])))
adamc@1270 2564 | SOME (xs, xncs) =>
adamc@1270 2565 let
adamc@1270 2566 val k = (L'.KType, loc)
adamc@1270 2567 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2568
adamc@1270 2569 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270 2570 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270 2571 val env = E.pushDatatype env n' xs xncs
adamc@1270 2572
adamc@1270 2573 val t = (L'.CNamed n', loc)
adamc@1270 2574 val env = foldl (fn ((x, n, to), env) =>
adamc@805 2575 let
adamc@1270 2576 val t = case to of
adamc@1270 2577 NONE => t
adamc@1270 2578 | SOME t' => (L'.TFun (t', t), loc)
adamc@1270 2579
adamc@1270 2580 val t = foldr (fn (x, t) =>
adamc@1270 2581 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2582 t xs
adamc@805 2583 in
adamc@1270 2584 E.pushENamedAs env x n t
adamc@1270 2585 end) env xncs
adamc@1270 2586 in
adamc@1270 2587 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270 2588 end)
adamc@1270 2589 | _ => (strError env (NotDatatype loc);
adamc@1270 2590 ([], (env, denv, [])))
adamc@1270 2591 end)
adamc@1270 2592
adamc@1270 2593 | L.SgiVal (x, c) =>
adamc@1270 2594 let
adamc@1270 2595 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2596
adamc@1270 2597 val old = c'
adamc@1270 2598 val c' = normClassConstraint env c'
adamc@1270 2599 val (env', n) = E.pushENamed env x c'
adamc@1270 2600 in
adamc@1270 2601 (unifyKinds env ck ktype
adam@1719 2602 handle KUnify arg => strError env (NotType (loc, ck, arg)));
adamc@1270 2603
adamc@1270 2604 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2605 end
adamc@1270 2606
adamc@1270 2607 | L.SgiTable (x, c, pe, ce) =>
adamc@1270 2608 let
adamc@1270 2609 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270 2610
adamc@1270 2611 val (c', ck, gs') = elabCon (env, denv) c
adam@1639 2612 val pkey = cunif env (loc, cstK)
adam@1639 2613 val visible = cunif env (loc, cstK)
adam@1886 2614
adam@1886 2615 val x' = x ^ "_hidden_constraints"
adam@1886 2616 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adam@1886 2617 val hidden = (L'.CNamed hidden_n, loc)
adam@1886 2618
adam@1886 2619 val uniques = (L'.CConcat (visible, hidden), loc)
adamc@1270 2620
adamc@1270 2621 val ct = tableOf ()
adamc@1270 2622 val ct = (L'.CApp (ct, c'), loc)
adamc@1270 2623 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270 2624
adamc@1270 2625 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270 2626 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2627 | _ => NONE) gs''
adamc@707 2628
adamc@1270 2629 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270 2630 val pst = (L'.CApp (pst, c'), loc)
adamc@1270 2631 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270 2632
adamc@1270 2633 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270 2634 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270 2635 | _ => NONE) gs'''
adamc@1270 2636
adamc@1270 2637 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270 2638 val cst = (L'.CApp (cst, c'), loc)
adamc@1270 2639 val cst = (L'.CApp (cst, visible), loc)
adam@1886 2640
adam@1886 2641 val (env', n) = E.pushENamed env' x ct
adamc@1270 2642 in
adamc@1270 2643 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270 2644 checkCon env' pe' pet pst;
adamc@1270 2645 checkCon env' ce' cet cst;
adamc@1270 2646
adam@1886 2647 ([(L'.SgiConAbs (x', hidden_n, cstK), loc),
adam@1912 2648 (L'.SgiConstraint ((L'.CConcat (pkey, visible), loc), hidden), loc),
adam@1886 2649 (L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270 2650 end
adamc@1270 2651
adamc@1270 2652 | L.SgiStr (x, sgn) =>
adamc@1270 2653 let
adamc@1270 2654 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2655 val (env', n) = E.pushStrNamed env x sgn'
adam@1864 2656 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1270 2657 in
adam@1864 2658 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv', gs' @ gs))
adamc@1270 2659 end
adamc@1270 2660
adamc@1270 2661 | L.SgiSgn (x, sgn) =>
adamc@1270 2662 let
adamc@1270 2663 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2664 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270 2665 in
adamc@1270 2666 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2667 end
adamc@1270 2668
adamc@1270 2669 | L.SgiInclude sgn =>
adamc@1270 2670 let
adamc@1270 2671 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2672 in
adamc@1270 2673 case #1 (hnormSgn env sgn') of
adamc@1270 2674 L'.SgnConst sgis =>
adamc@1270 2675 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270 2676 | _ => (sgnError env (NotIncludable sgn');
adamc@1270 2677 ([], (env, denv, [])))
adamc@1270 2678 end
adamc@1270 2679
adamc@1270 2680 | L.SgiConstraint (c1, c2) =>
adamc@1270 2681 let
adamc@1270 2682 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270 2683 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270 2684
adamc@1270 2685 val denv = D.assert env denv (c1', c2')
adamc@1270 2686 in
adam@1639 2687 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639 2688 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@1270 2689
adamc@1270 2690 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270 2691 end
adamc@1270 2692
adamc@1270 2693 | L.SgiClassAbs (x, k) =>
adamc@1270 2694 let
adamc@1270 2695 val k = elabKind env k
adamc@1270 2696 val (env, n) = E.pushCNamed env x k NONE
adamc@1270 2697 val env = E.pushClass env n
adamc@1270 2698 in
adamc@1270 2699 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270 2700 end
adamc@1270 2701
adamc@1270 2702 | L.SgiClass (x, k, c) =>
adamc@1270 2703 let
adamc@1270 2704 val k = elabKind env k
adamc@1270 2705 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270 2706 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270 2707 val env = E.pushClass env n
adamc@1270 2708 in
adamc@1270 2709 checkKind env c' ck k;
adamc@1270 2710 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270 2711 end)
adamc@211 2712
adamc@83 2713 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2714 case sgn of
adamc@31 2715 L.SgnConst sgis =>
adamc@31 2716 let
adamc@88 2717 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2718
adamc@62 2719 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2720 case sgi of
adamc@62 2721 L'.SgiConAbs (x, _, _) =>
adamc@62 2722 (if SS.member (cons, x) then
adamc@62 2723 sgnError env (DuplicateCon (loc, x))
adamc@62 2724 else
adamc@62 2725 ();
adamc@62 2726 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2727 | L'.SgiCon (x, _, _, _) =>
adamc@62 2728 (if SS.member (cons, x) then
adamc@62 2729 sgnError env (DuplicateCon (loc, x))
adamc@62 2730 else
adamc@62 2731 ();
adamc@62 2732 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2733 | L'.SgiDatatype dts =>
adamc@156 2734 let
adamc@805 2735 val (cons, vals) =
adamc@805 2736 let
adamc@805 2737 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2738 let
adamc@805 2739 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2740 (if SS.member (vals, x) then
adamc@805 2741 sgnError env (DuplicateVal (loc, x))
adamc@805 2742 else
adamc@805 2743 ();
adamc@805 2744 SS.add (vals, x)))
adamc@805 2745 vals xncs
adamc@805 2746 in
adamc@805 2747 if SS.member (cons, x) then
adamc@805 2748 sgnError env (DuplicateCon (loc, x))
adamc@805 2749 else
adamc@805 2750 ();
adamc@805 2751 (SS.add (cons, x), vals)
adamc@805 2752 end
adamc@805 2753 in
adamc@805 2754 foldl doOne (cons, vals) dts
adamc@805 2755 end
adamc@156 2756 in
adamc@805 2757 (cons, vals, sgns, strs)
adamc@156 2758 end
adamc@191 2759 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2760 (if SS.member (cons, x) then
adamc@156 2761 sgnError env (DuplicateCon (loc, x))
adamc@156 2762 else
adamc@156 2763 ();
adamc@156 2764 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2765 | L'.SgiVal (x, _, _) =>
adamc@62 2766 (if SS.member (vals, x) then
adamc@62 2767 sgnError env (DuplicateVal (loc, x))
adamc@62 2768 else
adamc@62 2769 ();
adamc@62 2770 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2771 | L'.SgiSgn (x, _, _) =>
adamc@62 2772 (if SS.member (sgns, x) then
adamc@62 2773 sgnError env (DuplicateSgn (loc, x))
adamc@62 2774 else
adamc@62 2775 ();
adamc@62 2776 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2777 | L'.SgiStr (x, _, _) =>
adamc@62 2778 (if SS.member (strs, x) then
adamc@62 2779 sgnError env (DuplicateStr (loc, x))
adamc@62 2780 else
adamc@62 2781 ();
adamc@88 2782 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2783 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2784 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2785 (if SS.member (cons, x) then
adamc@211 2786 sgnError env (DuplicateCon (loc, x))
adamc@211 2787 else
adamc@211 2788 ();
adamc@211 2789 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2790 | L'.SgiClass (x, _, _, _) =>
adamc@211 2791 (if SS.member (cons, x) then
adamc@211 2792 sgnError env (DuplicateCon (loc, x))
adamc@211 2793 else
adamc@211 2794 ();
adamc@460 2795 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2796 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2797 in
adamc@83 2798 ((L'.SgnConst sgis', loc), gs)
adamc@31 2799 end
adamc@31 2800 | L.SgnVar x =>
adamc@31 2801 (case E.lookupSgn env x of
adamc@31 2802 NONE =>
adamc@31 2803 (sgnError env (UnboundSgn (loc, x));
adamc@83 2804 ((L'.SgnError, loc), []))
adamc@83 2805 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2806 | L.SgnFun (m, dom, ran) =>
adamc@41 2807 let
adamc@83 2808 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2809 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2810 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2811 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2812 in
adamc@83 2813 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2814 end
adam@1864 2815 | L.SgnWhere (sgn, ms, x, c) =>
adamc@42 2816 let
adamc@83 2817 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2818 val (c', ck, ds2) = elabCon (env, denv) c
adam@1864 2819
adam@1864 2820 fun checkPath (ms, sgn') =
adam@1864 2821 case #1 (hnormSgn env sgn') of
adam@1864 2822 L'.SgnConst sgis =>
adam@1864 2823 List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adam@1864 2824 List.null ms andalso x' = x andalso
adam@1864 2825 (unifyKinds env k ck
adam@1864 2826 handle KUnify x => sgnError env (WhereWrongKind x);
adam@1864 2827 true)
adam@1864 2828 | (L'.SgiStr (x', _, sgn''), _) =>
adam@1864 2829 (case ms of
adam@1864 2830 [] => false
adam@1864 2831 | m :: ms' =>
adam@1864 2832 m = x' andalso
adam@1864 2833 checkPath (ms', sgn''))
adam@1864 2834 | _ => false) sgis
adam@1864 2835 | _ => false
adam@1864 2836 in
adam@1864 2837 if checkPath (ms, sgn') then
adam@1864 2838 ((L'.SgnWhere (sgn', ms, x, c'), loc), ds1 @ ds2)
adam@1864 2839 else
adam@1864 2840 (sgnError env (UnWhereable (sgn', x));
adam@1864 2841 (sgnerror, []))
adamc@42 2842 end
adamc@59 2843 | L.SgnProj (m, ms, x) =>
adamc@59 2844 (case E.lookupStr env m of
adamc@59 2845 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2846 (sgnerror, []))
adamc@59 2847 | SOME (n, sgn) =>
adamc@59 2848 let
adamc@59 2849 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2850 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2851 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2852 (strerror, sgnerror))
adamc@59 2853 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2854 ((L'.StrVar n, loc), sgn) ms
adamc@59 2855 in
adamc@59 2856 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2857 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2858 (sgnerror, []))
adamc@83 2859 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2860 end)
adamc@59 2861
adamc@31 2862
adamc@706 2863 and selfify env {str, strs, sgn} =
adamc@66 2864 case #1 (hnormSgn env sgn) of
adamc@66 2865 L'.SgnError => sgn
adamc@66 2866 | L'.SgnVar _ => sgn
adamc@66 2867
adamc@66 2868 | L'.SgnConst sgis =>
adam@1387 2869 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387 2870 (fn (sgi, env) =>
adam@1387 2871 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387 2872 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2873 | (L'.SgiDatatype dts, loc) =>
adam@1387 2874 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387 2875 | (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387 2876 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2877 | (L'.SgiStr (x, n, sgn), loc) =>
adam@1387 2878 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387 2879 | x => [x],
adam@1387 2880 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66 2881 | L'.SgnFun _ => sgn
adamc@66 2882 | L'.SgnWhere _ => sgn
adamc@66 2883 | L'.SgnProj (m, ms, x) =>
adamc@66 2884 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2885 (L'.StrVar m, #2 sgn) ms,
adamc@66 2886 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2887 field = x} of
adamc@66 2888 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2889 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2890
adamc@706 2891 and selfifyAt env {str, sgn} =
adamc@66 2892 let
adamc@66 2893 fun self (str, _) =
adamc@66 2894 case str of
adamc@66 2895 L'.StrVar x => SOME (x, [])
adamc@66 2896 | L'.StrProj (str, x) =>
adamc@66 2897 (case self str of
adamc@66 2898 NONE => NONE
adamc@66 2899 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2900 | _ => NONE
adamc@66 2901 in
adamc@66 2902 case self str of
adamc@66 2903 NONE => sgn
adamc@66 2904 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2905 end
adamc@66 2906
adamc@706 2907 and dopen env {str, strs, sgn} =
adamc@66 2908 let
adam@1527 2909 fun isVisible x = x <> "" andalso String.sub (x, 0) <> #"?"
adam@1527 2910
adamc@66 2911 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2912 (L'.StrVar str, #2 sgn) strs
adamc@66 2913 in
adamc@66 2914 case #1 (hnormSgn env sgn) of
adamc@66 2915 L'.SgnConst sgis =>
adamc@805 2916 ListUtil.foldlMapConcat
adamc@805 2917 (fn ((sgi, loc), env') =>
adamc@805 2918 let
adamc@805 2919 val d =
adamc@805 2920 case sgi of
adamc@805 2921 L'.SgiConAbs (x, n, k) =>
adam@1527 2922 if isVisible x then
adam@1527 2923 let
adam@1527 2924 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2925 in
adam@1527 2926 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2927 end
adam@1527 2928 else
adam@1527 2929 []
adamc@805 2930 | L'.SgiCon (x, n, k, c) =>
adam@1527 2931 if isVisible x then
adam@1527 2932 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1527 2933 else
adam@1527 2934 []
adamc@805 2935 | L'.SgiDatatype dts =>
adam@1527 2936 List.mapPartial (fn (x, n, xs, xncs) => if isVisible x then
adam@1527 2937 SOME (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adam@1527 2938 else
adam@1527 2939 NONE) dts
adamc@805 2940 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adam@1527 2941 if isVisible x then
adam@1527 2942 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adam@1527 2943 else
adam@1527 2944 []
adamc@805 2945 | L'.SgiVal (x, n, t) =>
adam@1527 2946 if isVisible x then
adam@1527 2947 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adam@1527 2948 else
adam@1527 2949 []
adamc@805 2950 | L'.SgiStr (x, n, sgn) =>
adam@1527 2951 if isVisible x then
adam@1527 2952 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adam@1527 2953 else
adam@1527 2954 []
adamc@805 2955 | L'.SgiSgn (x, n, sgn) =>
adam@1527 2956 if isVisible x then
adam@1527 2957 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adam@1527 2958 else
adam@1527 2959 []
adamc@805 2960 | L'.SgiConstraint (c1, c2) =>
adamc@805 2961 [(L'.DConstraint (c1, c2), loc)]
adamc@805 2962 | L'.SgiClassAbs (x, n, k) =>
adam@1527 2963 if isVisible x then
adam@1527 2964 let
adam@1527 2965 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2966 in
adam@1527 2967 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2968 end
adam@1527 2969 else
adam@1527 2970 []
adamc@805 2971 | L'.SgiClass (x, n, k, _) =>
adam@1527 2972 if isVisible x then
adam@1527 2973 let
adam@1527 2974 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2975 in
adam@1527 2976 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2977 end
adam@1527 2978 else
adam@1527 2979 []
adamc@805 2980 in
adamc@805 2981 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 2982 end)
adamc@805 2983 env sgis
adamc@66 2984 | _ => (strError env (UnOpenable sgn);
adamc@628 2985 ([], env))
adamc@66 2986 end
adamc@66 2987
adamc@706 2988 and sgiOfDecl (d, loc) =
adamc@31 2989 case d of
adamc@123 2990 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2991 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2992 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2993 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2994 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2995 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2996 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2997 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2998 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2999 | L'.DExport _ => []
adamc@707 3000 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 3001 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 3002 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 3003 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 3004 | L'.DView (tn, x, n, _, c) =>
adamc@754 3005 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@271 3006 | L'.DDatabase _ => []
adamc@460 3007 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 3008 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075 3009 | L'.DTask _ => []
adamc@1199 3010 | L'.DPolicy _ => []
adam@1294 3011 | L'.DOnError _ => []
adam@2010 3012 | L'.DFfi (x, n, _, t) => [(L'.SgiVal (x, n, t), loc)]
adamc@88 3013
adamc@1000 3014 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 3015 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 3016 ("sgn2", p_sgn env sgn2)];*)
adamc@35 3017 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 3018 (L'.SgnError, _) => ()
adamc@31 3019 | (_, L'.SgnError) => ()
adamc@31 3020
adamc@31 3021 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 3022 let
adam@2087 3023 (* This reshuffling was added to avoid some unfortunate unification behavior.
adam@2087 3024 * In particular, in sub-signature checking, constraints might be unified,
adam@2087 3025 * even when we don't expect them to be unifiable, deciding on bad values
adam@2087 3026 * for unification variables and dooming later unification.
adam@2087 3027 * By putting all the constraints _last_, we allow all the other unifications
adam@2087 3028 * to happen first, hoping that no unification variables survive to confuse
adam@2087 3029 * constraint unification. *)
adam@2087 3030
adam@2087 3031 val sgis2 =
adam@2087 3032 let
adam@2087 3033 val (constraints, others) = List.partition
adam@2087 3034 (fn (L'.SgiConstraint _, _) => true
adam@2087 3035 | _ => false) sgis2
adam@2087 3036 in
adam@2087 3037 case constraints of
adam@2087 3038 [] => sgis2
adam@2087 3039 | _ => others @ constraints
adam@2087 3040 end
adam@2087 3041
adamc@362 3042 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 3043 ("sgn2", p_sgn env sgn2),
adamc@362 3044 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 3045 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 3046
adamc@838 3047 fun cpart n = IM.find (!counterparts, n)
adamc@838 3048 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 3049
adamc@838 3050 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 3051 con = fn c =>
adamc@838 3052 case c of
adamc@838 3053 L'.CNamed n2 =>
adamc@838 3054 (case cpart n2 of
adamc@838 3055 NONE => c
adamc@838 3056 | SOME n1 => L'.CNamed n1)
adamc@838 3057 | _ => c}
adamc@838 3058
adamc@628 3059 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 3060 let
adam@1668 3061 (*val () = prefaces "folder" [("sgi2", p_sgn_item env sgi2All)]*)
adamc@362 3062
adamc@805 3063 fun seek' f p =
adamc@31 3064 let
adamc@628 3065 fun seek env ls =
adamc@31 3066 case ls of
adamc@805 3067 [] => f env
adamc@31 3068 | h :: t =>
adamc@469 3069 case p (env, h) of
adamc@469 3070 NONE =>
adamc@469 3071 let
adamc@469 3072 val env = case #1 h of
adamc@469 3073 L'.SgiCon (x, n, k, c) =>
adamc@471 3074 if E.checkENamed env n then
adamc@471 3075 env
adamc@471 3076 else
adamc@471 3077 E.pushCNamedAs env x n k (SOME c)
adamc@469 3078 | L'.SgiConAbs (x, n, k) =>
adamc@471 3079 if E.checkENamed env n then
adamc@471 3080 env
adamc@471 3081 else
adamc@471 3082 E.pushCNamedAs env x n k NONE
adamc@469 3083 | _ => env
adamc@469 3084 in
adamc@628 3085 seek (E.sgiBinds env h) t
adamc@469 3086 end
adamc@88 3087 | SOME envs => envs
adamc@31 3088 in
adamc@628 3089 seek env sgis1
adamc@31 3090 end
adamc@805 3091
adamc@1000 3092 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 3093 env))
adamc@31 3094 in
adamc@31 3095 case sgi of
adamc@31 3096 L'.SgiConAbs (x, n2, k2) =>
adam@1591 3097 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@31 3098 let
adamc@41 3099 fun found (x', n1, k1, co1) =
adamc@41 3100 if x = x' then
adamc@41 3101 let
adamc@623 3102 val () = unifyKinds env k1 k2
adam@1719 3103 handle KUnify (k1, k2, env', err) =>
adam@1591 3104 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3105 sgi2All, k2, env', err))
adamc@41 3106 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 3107 in
adamc@41 3108 SOME (if n1 = n2 then
adamc@41 3109 env
adamc@41 3110 else
adamc@838 3111 (cparts (n2, n1);
adamc@838 3112 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 3113 end
adamc@41 3114 else
adamc@41 3115 NONE
adamc@31 3116 in
adamc@31 3117 case sgi1 of
adamc@41 3118 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 3119 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 3120 | L'.SgiDatatype dts =>
adamc@191 3121 let
adamc@191 3122 val k = (L'.KType, loc)
adamc@805 3123
adamc@805 3124 fun search dts =
adamc@805 3125 case dts of
adamc@805 3126 [] => NONE
adamc@805 3127 | (x', n1, xs, _) :: dts =>
adamc@805 3128 let
adamc@805 3129 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3130 in
adamc@805 3131 case found (x', n1, k', NONE) of
adamc@805 3132 NONE => search dts
adamc@805 3133 | x => x
adamc@805 3134 end
adamc@191 3135 in
adamc@805 3136 search dts
adamc@191 3137 end
adamc@191 3138 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 3139 let
adamc@191 3140 val k = (L'.KType, loc)
adamc@191 3141 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 3142 in
adamc@191 3143 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 3144 end
adamc@711 3145 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 3146 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 3147 | _ => NONE
adamc@31 3148 end)
adamc@31 3149
adamc@31 3150 | L'.SgiCon (x, n2, k2, c2) =>
adam@1591 3151 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3152 let
adamc@211 3153 fun found (x', n1, k1, c1) =
adamc@211 3154 if x = x' then
adamc@211 3155 let
adamc@838 3156 val c2 = sub2 c2
adamc@838 3157
adamc@327 3158 fun good () =
adamc@327 3159 let
adamc@327 3160 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 3161 val env = if n1 = n2 then
adamc@327 3162 env
adamc@327 3163 else
adamc@839 3164 (cparts (n2, n1);
adamc@839 3165 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 3166 in
adamc@628 3167 SOME env
adamc@327 3168 end
adamc@211 3169 in
adamc@987 3170 (unifyCons env loc c1 c2;
adamc@628 3171 good ())
adam@1719 3172 handle CUnify (c1, c2, env', err) =>
adam@1591 3173 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719 3174 sgi2All, c2, env', err));
adamc@211 3175 good ())
adamc@211 3176 end
adamc@211 3177 else
adamc@211 3178 NONE
adamc@211 3179 in
adamc@211 3180 case sgi1 of
adamc@211 3181 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 3182 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3183 | _ => NONE
adamc@211 3184 end)
adamc@31 3185
adamc@805 3186 | L'.SgiDatatype dts2 =>
adamc@805 3187 let
adam@1591 3188 fun found' (sgi1All as (_, loc), (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 3189 if x1 <> x2 then
adamc@805 3190 NONE
adamc@805 3191 else
adamc@805 3192 let
adamc@805 3193 fun mismatched ue =
adam@1591 3194 (sgnError env (SgiMismatchedDatatypes (loc, sgi1All, sgi2All, ue));
adamc@805 3195 SOME env)
adamc@805 3196
adamc@805 3197 val k = (L'.KType, loc)
adamc@805 3198 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 3199
adamc@805 3200 fun good () =
adamc@805 3201 let
adamc@805 3202 val env = E.sgiBinds env sgi1All
adamc@805 3203 val env = if n1 = n2 then
adamc@805 3204 env
adamc@805 3205 else
adamc@838 3206 (cparts (n2, n1);
adamc@838 3207 E.pushCNamedAs env x1 n2 k'
adamc@838 3208 (SOME (L'.CNamed n1, loc)))
adamc@805 3209 in
adamc@805 3210 SOME env
adamc@805 3211 end
adamc@805 3212
adamc@805 3213 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 3214 val env = if n1 = n2 then
adamc@805 3215 env
adamc@805 3216 else
adamc@838 3217 (cparts (n2, n1);
adamc@838 3218 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 3219 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 3220 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 3221 String.compare (x1, x2) <> EQUAL
adamc@805 3222 orelse case (t1, t2) of
adamc@805 3223 (NONE, NONE) => false
adamc@805 3224 | (SOME t1, SOME t2) =>
adamc@987 3225 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 3226 | _ => true
adamc@805 3227 in
adamc@805 3228 (if xs1 <> xs2
adamc@805 3229 orelse length xncs1 <> length xncs2
adamc@805 3230 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 3231 mismatched NONE
adamc@160 3232 else
adamc@805 3233 good ())
adamc@805 3234 handle CUnify ue => mismatched (SOME ue)
adamc@805 3235 end
adamc@805 3236 in
adamc@805 3237 seek'
adamc@805 3238 (fn _ =>
adamc@805 3239 let
adamc@805 3240 fun seekOne (dt2, env) =
adamc@805 3241 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3242 case sgi1 of
adamc@805 3243 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 3244 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 3245 | _ => NONE)
adamc@805 3246
adamc@805 3247 fun seekAll (dts, env) =
adamc@805 3248 case dts of
adamc@805 3249 [] => env
adamc@805 3250 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 3251 in
adamc@805 3252 seekAll (dts2, env)
adamc@805 3253 end)
adamc@805 3254 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3255 let
adamc@805 3256 fun found dts1 =
adamc@805 3257 let
adamc@805 3258 fun iter (dts1, dts2, env) =
adamc@805 3259 case (dts1, dts2) of
adamc@805 3260 ([], []) => SOME env
adamc@805 3261 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 3262 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 3263 NONE => NONE
adamc@805 3264 | SOME env => iter (dts1, dts2, env))
adamc@805 3265 | _ => NONE
adamc@805 3266 in
adamc@805 3267 iter (dts1, dts2, env)
adamc@805 3268 end
adamc@805 3269 in
adamc@805 3270 case sgi1 of
adamc@805 3271 L'.SgiDatatype dts1 => found dts1
adamc@805 3272 | _ => NONE
adamc@805 3273 end)
adamc@805 3274 end
adamc@156 3275
adamc@191 3276 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adam@1591 3277 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@158 3278 case sgi1 of
adamc@191 3279 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 3280 if x = x' then
adamc@158 3281 let
adamc@158 3282 val k = (L'.KType, loc)
adamc@191 3283 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 3284 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 3285 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 3286
adamc@158 3287 fun good () =
adamc@158 3288 let
adamc@191 3289 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 3290 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 3291 in
adamc@838 3292 cparts (n2, n1);
adamc@628 3293 SOME env
adamc@158 3294 end
adamc@158 3295 in
adamc@987 3296 (unifyCons env loc t1 t2;
adamc@628 3297 good ())
adam@1719 3298 handle CUnify (c1, c2, env', err) =>
adam@1719 3299 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@158 3300 good ())
adamc@158 3301 end
adamc@158 3302 else
adamc@158 3303 NONE
adamc@158 3304
adamc@158 3305 | _ => NONE)
adamc@156 3306
adamc@32 3307 | L'.SgiVal (x, n2, c2) =>
adam@1591 3308 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@32 3309 case sgi1 of
adamc@41 3310 L'.SgiVal (x', n1, c1) =>
adamc@41 3311 if x = x' then
adamc@838 3312 ((*prefaces "val" [("x", PD.string x),
adamc@838 3313 ("n1", PD.string (Int.toString n1)),
adamc@838 3314 ("c1", p_con env c1),
adamc@838 3315 ("c2", p_con env c2),
adamc@838 3316 ("c2'", p_con env (sub2 c2))];*)
adamc@987 3317 unifyCons env loc c1 (sub2 c2);
adamc@628 3318 SOME env)
adam@1719 3319 handle CUnify (c1, c2, env', err) =>
adam@1719 3320 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@628 3321 SOME env)
adamc@41 3322 else
adamc@41 3323 NONE
adamc@32 3324 | _ => NONE)
adamc@32 3325
adamc@33 3326 | L'.SgiStr (x, n2, sgn2) =>
adam@1591 3327 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@33 3328 case sgi1 of
adamc@41 3329 L'.SgiStr (x', n1, sgn1) =>
adamc@41 3330 if x = x' then
adamc@66 3331 let
adam@1591 3332 val () = subSgn' counterparts env loc sgn1 sgn2
adamc@66 3333 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 3334 val env = if n1 = n2 then
adamc@66 3335 env
adamc@66 3336 else
adamc@66 3337 E.pushStrNamedAs env x n2
adamc@66 3338 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 3339 sgn = sgn2})
adamc@66 3340 in
adamc@628 3341 SOME env
adamc@66 3342 end
adamc@41 3343 else
adamc@41 3344 NONE
adamc@33 3345 | _ => NONE)
adamc@59 3346
adamc@59 3347 | L'.SgiSgn (x, n2, sgn2) =>
adam@1591 3348 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@59 3349 case sgi1 of
adamc@59 3350 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 3351 if x = x' then
adamc@65 3352 let
adam@1591 3353 val () = subSgn' counterparts env loc sgn1 sgn2
adam@1591 3354 val () = subSgn' counterparts env loc sgn2 sgn1
adamc@65 3355
adamc@65 3356 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 3357 val env = if n1 = n2 then
adamc@65 3358 env
adamc@65 3359 else
adamc@838 3360 (cparts (n2, n1);
adamc@838 3361 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 3362 in
adamc@628 3363 SOME env
adamc@65 3364 end
adamc@59 3365 else
adamc@59 3366 NONE
adamc@59 3367 | _ => NONE)
adamc@88 3368
adamc@88 3369 | L'.SgiConstraint (c2, d2) =>
adam@1591 3370 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@88 3371 case sgi1 of
adamc@88 3372 L'.SgiConstraint (c1, d1) =>
adamc@987 3373 if consEq env loc (c1, c2)
adamc@987 3374 andalso consEq env loc (d1, d2) then
adamc@628 3375 SOME env
adamc@88 3376 else
adamc@88 3377 NONE
adamc@88 3378 | _ => NONE)
adamc@203 3379
adamc@563 3380 | L'.SgiClassAbs (x, n2, k2) =>
adam@1591 3381 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3382 let
adamc@563 3383 fun found (x', n1, k1, co) =
adamc@211 3384 if x = x' then
adamc@211 3385 let
adamc@623 3386 val () = unifyKinds env k1 k2
adam@1719 3387 handle KUnify (k1, k2, env', err) =>
adam@1591 3388 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3389 sgi2All, k2, env', err))
adamc@563 3390
adamc@711 3391 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 3392 in
adamc@211 3393 SOME (if n1 = n2 then
adamc@211 3394 env
adamc@211 3395 else
adamc@838 3396 (cparts (n2, n1);
adamc@838 3397 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 3398 end
adamc@211 3399 else
adamc@211 3400 NONE
adamc@211 3401 in
adamc@211 3402 case sgi1 of
adamc@563 3403 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 3404 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adam@1797 3405 | L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adam@1797 3406 | L'.SgiCon (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 3407 | _ => NONE
adamc@211 3408 end)
adamc@563 3409 | L'.SgiClass (x, n2, k2, c2) =>
adam@1591 3410 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3411 let
adamc@563 3412 fun found (x', n1, k1, c1) =
adamc@211 3413 if x = x' then
adamc@211 3414 let
adamc@623 3415 val () = unifyKinds env k1 k2
adam@1719 3416 handle KUnify (k1, k2, env', err) =>
adam@1591 3417 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3418 sgi2All, k2, env', err))
adamc@563 3419
adamc@838 3420 val c2 = sub2 c2
adamc@838 3421
adamc@218 3422 fun good () =
adamc@218 3423 let
adamc@711 3424 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 3425 val env = if n1 = n2 then
adamc@218 3426 env
adamc@218 3427 else
adamc@839 3428 (cparts (n2, n1);
adamc@839 3429 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 3430 in
adamc@628 3431 SOME env
adamc@218 3432 end
adamc@211 3433 in
adamc@987 3434 (unifyCons env loc c1 c2;
adamc@628 3435 good ())
adam@1719 3436 handle CUnify (c1, c2, env', err) =>
adam@1591 3437 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719 3438 sgi2All, c2, env', err));
adamc@211 3439 good ())
adamc@211 3440 end
adamc@211 3441 else
adamc@211 3442 NONE
adamc@211 3443 in
adamc@211 3444 case sgi1 of
adamc@563 3445 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adam@1797 3446 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3447 | _ => NONE
adamc@211 3448 end)
adamc@31 3449 end
adamc@31 3450 in
adamc@628 3451 ignore (foldl folder env sgis2)
adamc@31 3452 end
adamc@31 3453
adamc@41 3454 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 3455 let
adamc@480 3456 val ran2 =
adamc@43 3457 if n1 = n2 then
adamc@480 3458 ran2
adamc@43 3459 else
adamc@480 3460 subStrInSgn (n2, n1) ran2
adamc@43 3461 in
adamc@1000 3462 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 3463 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 3464 end
adamc@41 3465
adamc@1000 3466 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 3467
adam@1580 3468 and subSgn env x y z = subSgn' (ref IM.empty) env x y z
adam@1580 3469 handle e as E.UnboundNamed _ => if ErrorMsg.anyErrors () then () else raise e
adamc@61 3470
adamc@706 3471 and positive self =
adamc@312 3472 let
adamc@312 3473 open L
adamc@312 3474
adamc@312 3475 fun none (c, _) =
adamc@312 3476 case c of
adamc@312 3477 CAnnot (c, _) => none c
adamc@312 3478
adamc@312 3479 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 3480 | TCFun (_, _, _, c) => none c
adamc@312 3481 | TRecord c => none c
adamc@312 3482
adamc@312 3483 | CVar ([], x) => x <> self
adamc@312 3484 | CVar _ => true
adamc@312 3485 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3486 | CAbs _ => false
adamc@628 3487 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3488
adamc@623 3489 | CKAbs _ => false
adamc@623 3490 | TKFun _ => false
adamc@623 3491
adamc@312 3492 | CName _ => true
adamc@312 3493
adamc@312 3494 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3495 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3496 | CMap => true
adamc@312 3497
adamc@312 3498 | CUnit => true
adamc@312 3499
adamc@312 3500 | CTuple cs => List.all none cs
adamc@312 3501 | CProj (c, _) => none c
adamc@312 3502
adamc@312 3503 | CWild _ => false
adamc@312 3504
adamc@312 3505 fun pos (c, _) =
adamc@312 3506 case c of
adamc@312 3507 CAnnot (c, _) => pos c
adamc@312 3508
adamc@312 3509 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3510 | TCFun (_, _, _, c) => pos c
adamc@312 3511 | TRecord c => pos c
adamc@312 3512
adamc@312 3513 | CVar _ => true
adamc@312 3514 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3515 | CAbs _ => false
adamc@628 3516 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3517
adamc@623 3518 | CKAbs _ => false
adamc@623 3519 | TKFun _ => false
adamc@623 3520
adamc@312 3521 | CName _ => true
adamc@312 3522
adamc@312 3523 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3524 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3525 | CMap => true
adamc@312 3526
adamc@312 3527 | CUnit => true
adamc@312 3528
adamc@312 3529 | CTuple cs => List.all pos cs
adamc@312 3530 | CProj (c, _) => pos c
adamc@312 3531
adamc@312 3532 | CWild _ => false
adamc@312 3533 in
adamc@312 3534 pos
adamc@312 3535 end
adamc@312 3536
adamc@706 3537 and wildifyStr env (str, sgn) =
adamc@325 3538 case #1 (hnormSgn env sgn) of
adamc@325 3539 L'.SgnConst sgis =>
adamc@325 3540 (case #1 str of
adamc@325 3541 L.StrConst ds =>
adamc@325 3542 let
adamc@1270 3543 fun cname d =
adamc@1270 3544 case d of
adamc@1270 3545 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270 3546 | L'.SgiConAbs (x, _, _) => SOME x
adamc@1270 3547 | L'.SgiClass (x, _, _, _) => SOME x
adamc@1270 3548 | L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270 3549 | _ => NONE
adamc@1270 3550
adamc@1270 3551 fun dname (d, _) =
adamc@1270 3552 case d of
adamc@1270 3553 L.DCon (x, _, _) => SOME x
adamc@1270 3554 | _ => NONE
adamc@1270 3555
adamc@493 3556 fun decompileKind (k, loc) =
adamc@493 3557 case k of
adamc@493 3558 L'.KType => SOME (L.KType, loc)
adamc@493 3559 | L'.KArrow (k1, k2) =>
adamc@493 3560 (case (decompileKind k1, decompileKind k2) of
adamc@493 3561 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3562 | _ => NONE)
adamc@493 3563 | L'.KName => SOME (L.KName, loc)
adamc@493 3564 | L'.KRecord k =>
adamc@493 3565 (case decompileKind k of
adamc@493 3566 SOME k => SOME (L.KRecord k, loc)
adamc@493 3567 | _ => NONE)
adamc@493 3568 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3569 | L'.KTuple ks =>
adamc@493 3570 let
adamc@493 3571 val ks' = List.mapPartial decompileKind ks
adamc@493 3572 in
adamc@493 3573 if length ks' = length ks then
adamc@493 3574 SOME (L.KTuple ks', loc)
adamc@493 3575 else
adamc@493 3576 NONE
adamc@493 3577 end
adamc@493 3578
adamc@493 3579 | L'.KError => NONE
adam@1639 3580 | L'.KUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adamc@493 3581 | L'.KUnif _ => NONE
adam@1639 3582 | L'.KTupleUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adam@1302 3583 | L'.KTupleUnif _ => NONE
adamc@493 3584
adamc@623 3585 | L'.KRel _ => NONE
adamc@623 3586 | L'.KFun _ => NONE
adamc@623 3587
adam@1529 3588 fun maybeHnorm env c =
adam@1865 3589 hnormCon env c
adam@1865 3590 handle E.UnboundNamed _ => c
adam@1865 3591
adam@1865 3592 fun decompileCon env c =
adam@1865 3593 case decompileCon' env c of
adam@1865 3594 SOME v => SOME v
adam@1865 3595 | NONE => decompileCon' env (maybeHnorm env c)
adam@1865 3596
adam@1865 3597 and decompileCon' env (c as (_, loc)) =
adam@1865 3598 case #1 c of
adamc@325 3599 L'.CRel i =>
adamc@325 3600 let
adamc@325 3601 val (s, _) = E.lookupCRel env i
adamc@325 3602 in
adamc@325 3603 SOME (L.CVar ([], s), loc)
adamc@325 3604 end
adamc@325 3605 | L'.CNamed i =>
adamc@325 3606 let
adamc@325 3607 val (s, _, _) = E.lookupCNamed env i
adamc@325 3608 in
adamc@325 3609 SOME (L.CVar ([], s), loc)
adamc@325 3610 end
adamc@325 3611 | L'.CModProj (m1, ms, x) =>
adamc@325 3612 let
adamc@325 3613 val (s, _) = E.lookupStrNamed env m1
adamc@325 3614 in
adamc@325 3615 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3616 end
adamc@325 3617 | L'.CName s => SOME (L.CName s, loc)
adam@1886 3618 | L'.CRecord (k, xcs) =>
adamc@325 3619 let
adamc@325 3620 fun fields xcs =
adamc@325 3621 case xcs of
adamc@325 3622 [] => SOME []
adamc@325 3623 | (x, t) :: xcs =>
adamc@325 3624 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3625 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3626 | _ => NONE
adam@1886 3627
adam@1886 3628 val c' = Option.map (fn xcs => (L.CRecord xcs, loc))
adam@1886 3629 (fields xcs)
adamc@325 3630 in
adam@1886 3631 Option.map (fn c' =>
adam@1886 3632 case decompileKind k of
adam@1886 3633 NONE => c'
adam@1886 3634 | SOME k' => (L.CAnnot (c', (L.KRecord k', loc)), loc)) c'
adamc@325 3635 end
adamc@325 3636 | L'.CConcat (c1, c2) =>
adamc@325 3637 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3638 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3639 | _ => NONE)
adamc@325 3640 | L'.CUnit => SOME (L.CUnit, loc)
adam@1639 3641 | L'.CUnif (nl, _, _, _, ref (L'.Known c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325 3642
adam@1585 3643 | L'.CApp (f, x) =>
adam@1585 3644 (case (decompileCon env f, decompileCon env x) of
adam@1585 3645 (SOME f, SOME x) => SOME (L.CApp (f, x), loc)
adam@1585 3646 | _ => NONE)
adam@1585 3647
adam@1864 3648 | L'.CTuple cs =>
adam@1864 3649 let
adam@1864 3650 val cs' = foldr (fn (c, cs') =>
adam@1864 3651 case cs' of
adam@1864 3652 NONE => NONE
adam@1864 3653 | SOME cs' =>
adam@1864 3654 case decompileCon env c of
adam@1864 3655 NONE => NONE
adam@1864 3656 | SOME c' => SOME (c' :: cs'))
adam@1864 3657 (SOME []) cs
adam@1864 3658 in
adam@1864 3659 case cs' of
adam@1864 3660 NONE => NONE
adam@1864 3661 | SOME cs' => SOME (L.CTuple cs', loc)
adam@1864 3662 end
adam@1864 3663
adam@1864 3664 | L'.CMap _ => SOME (L.CMap, loc)
adam@1865 3665 | L'.TRecord c =>
adam@1865 3666 (case decompileCon env c of
adam@1865 3667 NONE => NONE
adam@1865 3668 | SOME c' => SOME (L.TRecord c', loc))
adam@1864 3669
adam@1912 3670 | c => ((*Print.preface ("WTF?", p_con env (c, loc));*) NONE)
adamc@325 3671
adamc@1264 3672 fun buildNeeded env sgis =
adamc@1275 3673 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264 3674 (case sgi of
adam@1570 3675 L'.SgiCon (x, _, k, _) => naddCon (nd, x, k)
adam@1570 3676 | L'.SgiConAbs (x, _, k) => naddCon (nd, x, k)
adamc@1264 3677 | L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264 3678 | L'.SgiVal (x, _, t) =>
adamc@1264 3679 let
adamc@1277 3680 fun should t =
adamc@1277 3681 let
adamc@1277 3682 val t = normClassConstraint env' t
adamc@1277 3683 in
adamc@1277 3684 case #1 t of
adamc@1277 3685 L'.CApp (f, _) => isClassOrFolder env' f
adamc@1277 3686 | L'.TRecord t =>
adamc@1277 3687 (case hnormCon env' t of
adamc@1277 3688 (L'.CApp (f, _), _) =>
adamc@1277 3689 (case hnormCon env' f of
adamc@1277 3690 (L'.CApp (f, cl), loc) =>
adamc@1277 3691 (case hnormCon env' f of
adamc@1277 3692 (L'.CMap _, _) => isClassOrFolder env' cl
adamc@1277 3693 | _ => false)
adamc@1277 3694 | _ => false)
adamc@1277 3695 | _ => false)
adamc@1277 3696 | _ => false
adamc@1277 3697 end
adamc@1270 3698 in
adamc@1277 3699 if should t then
adamc@1277 3700 naddVal (nd, x)
adamc@1277 3701 else
adamc@1277 3702 nd
adamc@1264 3703 end
adamc@1264 3704 | L'.SgiStr (x, _, s) =>
adamc@1270 3705 (case #1 (hnormSgn env' s) of
adamc@1270 3706 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264 3707 | _ => nd)
adamc@1264 3708 | _ => nd,
adamc@1275 3709 E.sgiBinds env' (sgi, loc)))
adamc@1275 3710 (nempty, env) sgis)
adamc@1264 3711
adamc@1264 3712 val nd = buildNeeded env sgis
adamc@1264 3713
adamc@1264 3714 fun removeUsed (nd, ds) =
adamc@1264 3715 foldl (fn ((d, _), nd) =>
adamc@634 3716 case d of
adamc@1264 3717 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264 3718 | L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264 3719 | L.DOpen _ => nempty
adam@1868 3720 | L.DStr (x, _, _, (L.StrConst ds', _), _) =>
adamc@1264 3721 (case SM.find (nmods nd, x) of
adamc@1264 3722 NONE => nd
adamc@1270 3723 | SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264 3724 | _ => nd)
adamc@1264 3725 nd ds
adamc@1264 3726
adamc@1264 3727 val nd = removeUsed (nd, ds)
adamc@1264 3728
adam@1662 3729 (* Among the declarations present explicitly in the program, find the last constructor or constraint declaration.
adam@1662 3730 * The new constructor/constraint declarations that we add may safely be put after that point. *)
adam@1662 3731 fun findLast (ds, acc) =
adam@1662 3732 case ds of
adam@1662 3733 [] => ([], acc)
adam@1662 3734 | (d : L.decl) :: ds' =>
adam@1662 3735 let
adam@1662 3736 val isCony = case #1 d of
adam@1662 3737 L.DCon _ => true
adam@1662 3738 | L.DDatatype _ => true
adam@1662 3739 | L.DDatatypeImp _ => true
adam@1662 3740 | L.DStr _ => true
adam@1662 3741 | L.DConstraint _ => true
adam@1662 3742 | _ => false
adam@1662 3743 in
adam@1662 3744 if isCony then
adam@1662 3745 (ds, acc)
adam@1662 3746 else
adam@1662 3747 findLast (ds', d :: acc)
adam@1662 3748 end
adam@1662 3749
adam@1662 3750 val (dPrefix, dSuffix) = findLast (rev ds, [])
adam@1662 3751
adamc@1270 3752 fun extend (env, nd, ds) =
adamc@1264 3753 let
adamc@1264 3754 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264 3755 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264 3756 (SOME c1, SOME c2) =>
adamc@1264 3757 SOME (L.DConstraint (c1, c2), loc)
adam@1586 3758 | _ => NONE) (nconstraints nd)
adamc@1264 3759
adamc@1264 3760 val ds' =
adamc@1264 3761 case SS.listItems (nvals nd) of
adamc@1264 3762 [] => ds'
adamc@1264 3763 | xs =>
adamc@1264 3764 let
adamc@1264 3765 val ewild = (L.EWild, #2 str)
adamc@1264 3766 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264 3767 in
adamc@1264 3768 ds'' @ ds'
adamc@1264 3769 end
adamc@1264 3770
adamc@1275 3771 val ds' =
adam@1640 3772 case ncons nd of
adamc@1275 3773 [] => ds'
adamc@1264 3774 | xs =>
adam@1570 3775 map (fn (x, k) =>
adamc@1270 3776 let
adamc@1270 3777 val k =
adamc@1270 3778 case decompileKind k of
adamc@1270 3779 NONE => (L.KWild, #2 str)
adamc@1270 3780 | SOME k => k
adamc@1275 3781
adamc@1270 3782 val cwild = (L.CWild k, #2 str)
adamc@1270 3783 in
adam@1570 3784 (L.DCon (x, NONE, cwild), #2 str)
adamc@1275 3785 end) xs @ ds'
adamc@1275 3786
adamc@1275 3787 val ds = ds @ ds'
adamc@1264 3788 in
adam@1868 3789 map (fn d as (L.DStr (x, s, tm, (L.StrConst ds', loc'), r), loc) =>
adamc@1270 3790 (case SM.find (nmods nd, x) of
adamc@1270 3791 NONE => d
adamc@1270 3792 | SOME (env, nd') =>
adam@1868 3793 (L.DStr (x, s, tm, (L.StrConst (extend (env, nd', ds')), loc'), r), loc))
adamc@1270 3794 | d => d) ds
adamc@1264 3795 end
adamc@325 3796 in
adam@1662 3797 (L.StrConst (extend (env, nd, rev dPrefix) @ dSuffix), #2 str)
adamc@325 3798 end
adamc@325 3799 | _ => str)
adamc@325 3800 | _ => str
adamc@325 3801
adamc@706 3802 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3803 let
adamc@904 3804 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3805 (*val befor = Time.now ()*)
adamc@255 3806
adamc@255 3807 val r =
adamc@255 3808 case d of
adamc@255 3809 L.DCon (x, ko, c) =>
adamc@255 3810 let
adamc@255 3811 val k' = case ko of
adam@1639 3812 NONE => kunif env loc
adamc@623 3813 | SOME k => elabKind env k
adamc@255 3814
adamc@255 3815 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3816 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3817 in
adamc@255 3818 checkKind env c' ck k';
adamc@255 3819
adamc@255 3820 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3821 end
adamc@805 3822 | L.DDatatype dts =>
adamc@255 3823 let
adamc@255 3824 val k = (L'.KType, loc)
adamc@805 3825
adamc@805 3826 val (dts, env) = ListUtil.foldlMap
adamc@805 3827 (fn ((x, xs, xcs), env) =>
adamc@805 3828 let
adamc@805 3829 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3830 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3831 in
adamc@805 3832 ((x, n, xs, xcs), env)
adamc@805 3833 end)
adamc@805 3834 env dts
adamc@805 3835
adamc@805 3836 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3837 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3838 let
adamc@805 3839 val t = (L'.CNamed n, loc)
adamc@805 3840 val nxs = length xs - 1
adamc@805 3841 val t = ListUtil.foldli
adamc@805 3842 (fn (i, _, t) =>
adamc@805 3843 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3844
adamc@805 3845 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3846 (E.pushCRel env' x k,
adamc@805 3847 D.enter denv')) (env, denv) xs
adamc@805 3848
adamc@805 3849 val (xcs, (used, env, gs')) =
adamc@805 3850 ListUtil.foldlMap
adamc@805 3851 (fn ((x, to), (used, env, gs)) =>
adamc@805 3852 let
adamc@805 3853 val (to, t, gs') = case to of
adamc@805 3854 NONE => (NONE, t, gs)
adamc@805 3855 | SOME t' =>
adamc@805 3856 let
adamc@805 3857 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3858 in
adamc@805 3859 checkKind env' t' tk k;
adamc@805 3860 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3861 end
adamc@805 3862 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3863
adamc@805 3864 val (env, n') = E.pushENamed env x t
adamc@805 3865 in
adamc@805 3866 if SS.member (used, x) then
adamc@805 3867 strError env (DuplicateConstructor (x, loc))
adamc@805 3868 else
adamc@805 3869 ();
adamc@805 3870 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3871 end)
adamc@805 3872 (SS.empty, env, gs') xcs
adamc@805 3873 in
adamc@805 3874 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3875 end)
adamc@805 3876 (env, []) dts
adamc@255 3877 in
adamc@805 3878 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3879 end
adamc@255 3880
adamc@255 3881 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3882
adamc@255 3883 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3884 (case E.lookupStr env m1 of
adamc@255 3885 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3886 ([], (env, denv, gs)))
adamc@255 3887 | SOME (n, sgn) =>
adamc@255 3888 let
adamc@255 3889 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3890 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3891 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3892 (strerror, sgnerror))
adamc@255 3893 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3894 ((L'.StrVar n, loc), sgn) ms
adamc@255 3895 in
adamc@628 3896 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3897 (L'.CModProj (n, ms, s), _) =>
adamc@255 3898 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3899 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3900 ([], (env, denv, gs)))
adamc@255 3901 | SOME (xs, xncs) =>
adamc@255 3902 let
adamc@255 3903 val k = (L'.KType, loc)
adamc@255 3904 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3905 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3906 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3907 val env = E.pushDatatype env n' xs xncs
adamc@255 3908
adamc@255 3909 val t = (L'.CNamed n', loc)
adamc@844 3910 val nxs = length xs
adamc@844 3911 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3912 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3913 t xs
adamc@255 3914 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3915 let
adamc@255 3916 val t = case to of
adamc@255 3917 NONE => t
adamc@255 3918 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3919
adamc@255 3920 val t = foldr (fn (x, t) =>
adamc@255 3921 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3922 t xs
adamc@255 3923 in
adamc@255 3924 E.pushENamedAs env x n t
adamc@255 3925 end) env xncs
adamc@255 3926 in
adamc@628 3927 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3928 end)
adamc@255 3929 | _ => (strError env (NotDatatype loc);
adamc@255 3930 ([], (env, denv, [])))
adamc@255 3931 end)
adamc@255 3932
adamc@255 3933 | L.DVal (x, co, e) =>
adamc@255 3934 let
adamc@255 3935 val (c', _, gs1) = case co of
adam@1639 3936 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255 3937 | SOME c => elabCon (env, denv) c
adamc@255 3938
adamc@255 3939 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3940
adamc@629 3941 val () = checkCon env e' et c'
adamc@629 3942
adamc@674 3943 val c' = normClassConstraint env c'
adamc@255 3944 val (env', n) = E.pushENamed env x c'
adamc@255 3945 in
adamc@255 3946 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3947 ("c'", p_con env c')];*)
adamc@628 3948 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3949 end
adamc@255 3950 | L.DValRec vis =>
adamc@255 3951 let
adamc@255 3952 fun allowable (e, _) =
adamc@255 3953 case e of
adamc@255 3954 L.EAbs _ => true
adamc@255 3955 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 3956 | L.EKAbs (_, e) => allowable e
adamc@255 3957 | L.EDisjoint (_, _, e) => allowable e
adamc@255 3958 | _ => false
adamc@255 3959
adamc@255 3960 val (vis, gs) = ListUtil.foldlMap
adamc@255 3961 (fn ((x, co, e), gs) =>
adamc@255 3962 let
adamc@255 3963 val (c', _, gs1) = case co of
adam@1639 3964 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255 3965 | SOME c => elabCon (env, denv) c
adamc@674 3966 val c' = normClassConstraint env c'
adamc@255 3967 in
adamc@255 3968 ((x, c', e), enD gs1 @ gs)
adamc@280 3969 end) gs vis
adamc@255 3970
adamc@255 3971 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 3972 let
adamc@255 3973 val (env, n) = E.pushENamed env x c'
adamc@255 3974 in
adamc@255 3975 ((x, n, c', e), env)
adamc@255 3976 end) env vis
adamc@255 3977
adamc@255 3978 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 3979 let
adamc@255 3980 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 3981 in
adamc@628 3982 checkCon env e' et c';
adamc@255 3983 if allowable e then
adamc@255 3984 ()
adamc@255 3985 else
adamc@255 3986 expError env (IllegalRec (x, e'));
adamc@628 3987 ((x, n, c', e'), gs1 @ gs)
adamc@255 3988 end) gs vis
adam@1736 3989
adam@1736 3990 val vis = map (fn (x, n, t, e) => (x, n, normClassConstraint env t, e)) vis
adam@1736 3991 val d = (L'.DValRec vis, loc)
adamc@255 3992 in
adam@1736 3993 ([d], (E.declBinds env d, denv, gs))
adamc@255 3994 end
adamc@255 3995
adamc@255 3996 | L.DSgn (x, sgn) =>
adamc@255 3997 let
adamc@255 3998 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 3999 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 4000 in
adamc@255 4001 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 4002 end
adamc@255 4003
adam@1868 4004 | L.DStr (x, sgno, tmo, str, _) =>
adam@1732 4005 (case ModDb.lookup dAll of
adam@1732 4006 SOME d =>
adam@1732 4007 let
adam@1744 4008 val () = if !verbose then TextIO.print ("REUSE: " ^ x ^ "\n") else ()
adam@1732 4009 val env' = E.declBinds env d
adam@1732 4010 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4011 in
adam@1738 4012 ([d], (env', denv', gs))
adam@1732 4013 end
adam@1732 4014 | NONE =>
adam@1732 4015 let
adam@1744 4016 val () = if !verbose then TextIO.print ("CHECK: " ^ x ^ "\n") else ()
adam@1744 4017
adam@1732 4018 val () = if x = "Basis" then
adam@1732 4019 raise Fail "Not allowed to redefine structure 'Basis'"
adam@1732 4020 else
adam@1732 4021 ()
adam@1732 4022
adam@1732 4023 val formal = Option.map (elabSgn (env, denv)) sgno
adam@1732 4024
adam@1732 4025 val (str', sgn', gs') =
adam@1732 4026 case formal of
adam@1732 4027 NONE =>
adam@1732 4028 let
adam@1732 4029 val (str', actual, gs') = elabStr (env, denv) str
adam@1732 4030 in
adam@1732 4031 (str', selfifyAt env {str = str', sgn = actual}, gs')
adam@1732 4032 end
adam@1732 4033 | SOME (formal, gs1) =>
adam@1732 4034 let
adam@1732 4035 val str = wildifyStr env (str, formal)
adam@1732 4036 val (str', actual, gs2) = elabStr (env, denv) str
adam@1732 4037 in
adam@1732 4038 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adam@1732 4039 (str', formal, enD gs1 @ gs2)
adam@1732 4040 end
adam@1732 4041
adam@1732 4042 val (env', n) = E.pushStrNamed env x sgn'
adam@1883 4043
adam@1732 4044 val denv' =
adam@1732 4045 case #1 str' of
adam@1732 4046 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4047 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4048 | _ => denv
adam@1732 4049
adam@1732 4050 val dNew = (L'.DStr (x, n, sgn', str'), loc)
adam@1732 4051 in
adam@1732 4052 case #1 (hnormSgn env sgn') of
adam@1732 4053 L'.SgnFun _ =>
adam@1732 4054 (case #1 str' of
adam@1732 4055 L'.StrFun _ => ()
adam@1732 4056 | _ => strError env (FunctorRebind loc))
adam@1732 4057 | _ => ();
adam@1732 4058 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732 4059 ([dNew], (env', denv', gs' @ gs))
adam@1732 4060 end)
adam@1732 4061
adam@1733 4062 | L.DFfiStr (x, sgn, tmo) =>
adam@1732 4063 (case ModDb.lookup dAll of
adam@1732 4064 SOME d =>
adam@1732 4065 let
adam@1732 4066 val env' = E.declBinds env d
adam@1732 4067 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4068 in
adam@1732 4069 ([d], (env', denv', []))
adam@1732 4070 end
adam@1732 4071 | NONE =>
adam@1732 4072 let
adam@1732 4073 val (sgn', gs') = elabSgn (env, denv) sgn
adam@1732 4074
adam@1732 4075 val (env', n) = E.pushStrNamed env x sgn'
adam@1732 4076
adam@1732 4077 val dNew = (L'.DFfiStr (x, n, sgn'), loc)
adam@1732 4078 in
adam@1733 4079 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732 4080 ([dNew], (env', denv, enD gs' @ gs))
adam@1732 4081 end)
adamc@255 4082
adamc@255 4083 | L.DOpen (m, ms) =>
adamc@255 4084 (case E.lookupStr env m of
adamc@255 4085 NONE => (strError env (UnboundStr (loc, m));
adamc@255 4086 ([], (env, denv, gs)))
adamc@255 4087 | SOME (n, sgn) =>
adamc@255 4088 let
adamc@1030 4089 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 4090 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 4091 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 4092 (strerror, sgnerror))
adamc@1030 4093 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 4094 ((L'.StrVar n, loc), sgn) ms
adamc@1030 4095
adamc@1030 4096 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 4097
adamc@628 4098 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 4099 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 4100 in
adamc@255 4101 (ds, (env', denv', gs))
adamc@255 4102 end)
adamc@255 4103
adamc@255 4104 | L.DConstraint (c1, c2) =>
adamc@255 4105 let
adamc@255 4106 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 4107 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 4108 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 4109
adamc@628 4110 val denv' = D.assert env denv (c1', c2')
adamc@255 4111 in
adam@1639 4112 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639 4113 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@255 4114
adamc@628 4115 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 4116 end
adamc@255 4117
adamc@255 4118 | L.DOpenConstraints (m, ms) =>
adamc@255 4119 let
adamc@255 4120 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 4121 in
adamc@255 4122 ([], (env, denv, gs))
adamc@255 4123 end
adamc@255 4124
adamc@255 4125 | L.DExport str =>
adamc@255 4126 let
adamc@255 4127 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 4128
adamc@255 4129 val sgn =
adamc@255 4130 case #1 (hnormSgn env sgn) of
adamc@255 4131 L'.SgnConst sgis =>
adamc@255 4132 let
adamc@255 4133 fun doOne (all as (sgi, _), env) =
adamc@255 4134 (case sgi of
adamc@255 4135 L'.SgiVal (x, n, t) =>
adamc@325 4136 let
adamc@325 4137 fun doPage (makeRes, ran) =
adamc@628 4138 case hnormCon env ran of
adamc@628 4139 (L'.CApp (tf, arg), _) =>
adamc@628 4140 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 4141 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 4142 (L'.CApp (tf, arg3), _)) =>
adamc@325 4143 (case (basis = !basis_r,
adamc@720 4144 hnormCon env tf, hnormCon env arg3) of
adamc@325 4145 (true,
adamc@720 4146 (L'.CApp (tf, arg2), _),
adamc@628 4147 ((L'.CRecord (_, []), _))) =>
adamc@720 4148 (case (hnormCon env tf) of
adamc@720 4149 (L'.CApp (tf, arg1), _) =>
adamc@720 4150 (case (hnormCon env tf,
adamc@720 4151 hnormCon env arg1,
adamc@720 4152 hnormCon env arg2) of
adamc@720 4153 (tf, arg1,
adamc@720 4154 (L'.CRecord (_, []), _)) =>
adamc@720 4155 let
adamc@720 4156 val t = (L'.CApp (tf, arg1), loc)
adamc@720 4157 val t = (L'.CApp (t, arg2), loc)
adamc@720 4158 val t = (L'.CApp (t, arg3), loc)
adamc@720 4159 val t = (L'.CApp (
adamc@720 4160 (L'.CModProj
adamc@720 4161 (basis, [], "transaction"), loc),
adamc@325 4162 t), loc)
adam@1347 4163
adam@1347 4164 fun normArgs t =
adam@1347 4165 case hnormCon env t of
adam@1347 4166 (L'.TFun (dom, ran), loc) =>
adam@1347 4167 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347 4168 | t' => t'
adamc@720 4169 in
adam@1347 4170 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720 4171 end
adamc@325 4172 | _ => all)
adamc@325 4173 | _ => all)
adamc@325 4174 | _ => all)
adamc@325 4175 | _ => all)
adamc@325 4176 | _ => all
adamc@325 4177 in
adamc@628 4178 case hnormCon env t of
adamc@628 4179 (L'.TFun (dom, ran), _) =>
adamc@628 4180 (case hnormCon env dom of
adamc@628 4181 (L'.TRecord domR, _) =>
adamc@325 4182 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 4183 loc),
adamc@325 4184 t), loc), ran)
adamc@325 4185 | _ => all)
adamc@325 4186 | _ => doPage (fn t => t, t)
adamc@325 4187 end
adamc@255 4188 | _ => all,
adamc@255 4189 E.sgiBinds env all)
adamc@255 4190 in
adamc@255 4191 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 4192 end
adamc@255 4193 | _ => sgn
adamc@255 4194 in
adamc@255 4195 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 4196 end
adamc@255 4197
adamc@707 4198 | L.DTable (x, c, pe, ce) =>
adamc@255 4199 let
adamc@707 4200 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 4201
adamc@255 4202 val (c', k, gs') = elabCon (env, denv) c
adam@1639 4203 val pkey = cunif env (loc, cstK)
adam@1639 4204 val uniques = cunif env (loc, cstK)
adamc@705 4205
adamc@705 4206 val ct = tableOf ()
adamc@705 4207 val ct = (L'.CApp (ct, c'), loc)
adamc@707 4208 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 4209
adamc@705 4210 val (env, n) = E.pushENamed env x ct
adamc@707 4211 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 4212 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 4213
adamc@707 4214 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 4215 val pst = (L'.CApp (pst, c'), loc)
adamc@707 4216 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 4217
adamc@704 4218 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 4219 val cst = (L'.CApp (cst, c'), loc)
adamc@705 4220 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 4221 in
adamc@255 4222 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 4223 checkCon env pe' pet pst;
adamc@707 4224 checkCon env ce' cet cst;
adamc@707 4225 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 4226 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 4227 end
adamc@338 4228 | L.DSequence x =>
adamc@338 4229 let
adamc@338 4230 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 4231 in
adamc@338 4232 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 4233 end
adamc@754 4234 | L.DView (x, e) =>
adamc@754 4235 let
adamc@754 4236 val (e', t, gs') = elabExp (env, denv) e
adamc@754 4237
adamc@754 4238 val k = (L'.KRecord (L'.KType, loc), loc)
adam@1639 4239 val fs = cunif env (loc, k)
adam@1639 4240 val ts = cunif env (loc, (L'.KRecord k, loc))
adamc@754 4241 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 4242 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 4243 val ts = (L'.CApp (tf, ts), loc)
adamc@754 4244
adamc@754 4245 val cv = viewOf ()
adamc@754 4246 val cv = (L'.CApp (cv, fs), loc)
adamc@754 4247 val (env', n) = E.pushENamed env x cv
adamc@754 4248
adamc@754 4249 val ct = queryOf ()
adamc@1191 4250 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395 4251 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754 4252 val ct = (L'.CApp (ct, ts), loc)
adamc@754 4253 val ct = (L'.CApp (ct, fs), loc)
adamc@754 4254 in
adamc@754 4255 checkCon env e' t ct;
adamc@754 4256 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 4257 (env', denv, gs' @ gs))
adamc@754 4258 end
adamc@255 4259
adamc@280 4260 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 4261
adamc@459 4262 | L.DCookie (x, c) =>
adamc@459 4263 let
adamc@459 4264 val (c', k, gs') = elabCon (env, denv) c
adamc@459 4265 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 4266 in
adamc@459 4267 checkKind env c' k (L'.KType, loc);
adamc@459 4268 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 4269 end
adamc@720 4270 | L.DStyle x =>
adamc@718 4271 let
adamc@720 4272 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 4273 in
adamc@720 4274 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 4275 end
adamc@1075 4276 | L.DTask (e1, e2) =>
adamc@1073 4277 let
adamc@1075 4278 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075 4279 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075 4280
adam@1639 4281 val targ = cunif env (loc, (L'.KType, loc))
adam@1348 4282
adamc@1075 4283 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348 4284 val t1' = (L'.CApp (t1', targ), loc)
adam@1348 4285
adamc@1075 4286 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075 4287 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348 4288 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073 4289 in
adamc@1075 4290 checkCon env e1' t1 t1';
adamc@1075 4291 checkCon env e2' t2 t2';
adamc@1075 4292 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073 4293 end
adamc@1199 4294 | L.DPolicy e1 =>
adamc@1199 4295 let
adamc@1199 4296 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199 4297
adamc@1199 4298 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199 4299 in
adamc@1199 4300 checkCon env e1' t1 t1';
adamc@1199 4301 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199 4302 end
adamc@459 4303
adam@1294 4304 | L.DOnError (m1, ms, s) =>
adam@1294 4305 (case E.lookupStr env m1 of
adam@1294 4306 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294 4307 ([], (env, denv, [])))
adam@1294 4308 | SOME (n, sgn) =>
adam@1294 4309 let
adam@1294 4310 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294 4311 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294 4312 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294 4313 (strerror, sgnerror))
adam@1294 4314 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294 4315 ((L'.StrVar n, loc), sgn) ms
adam@1294 4316
adam@1294 4317 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294 4318 NONE => (expError env (UnboundExp (loc, s));
adam@1294 4319 cerror)
adam@1294 4320 | SOME t => t
adam@1294 4321
adam@1294 4322 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294 4323 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294 4324 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294 4325 in
adam@1407 4326 (unifyCons env loc t func
adam@1407 4327 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294 4328 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294 4329 end)
adam@1294 4330
adam@2010 4331 | L.DFfi (x, modes, t) =>
adam@2010 4332 let
adam@2010 4333 val () = if Settings.getLessSafeFfi () then
adam@2010 4334 ()
adam@2010 4335 else
adam@2010 4336 ErrorMsg.errorAt loc "To enable 'ffi' declarations, the .urp directive 'lessSafeFfi' is mandatory."
adam@2010 4337
adam@2010 4338 val (t', _, gs1) = elabCon (env, denv) t
adam@2010 4339 val t' = normClassConstraint env t'
adam@2010 4340 val (env', n) = E.pushENamed env x t'
adam@2010 4341 in
adam@2010 4342 ([(L'.DFfi (x, n, modes, t'), loc)], (env', denv, enD gs1 @ gs))
adam@2010 4343 end
adam@2010 4344
adamc@280 4345 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 4346 in
adam@1989 4347 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll),
adam@1989 4348 ("d'", p_list_sep PD.newline (ElabPrint.p_decl env) (#1 r))];*)
adamc@255 4349 r
adamc@255 4350 end
adamc@211 4351
adamc@83 4352 and elabStr (env, denv) (str, loc) =
adamc@31 4353 case str of
adamc@31 4354 L.StrConst ds =>
adamc@31 4355 let
adamc@88 4356 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 4357 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 4358
adamc@63 4359 val (sgis, _, _, _, _) =
adamc@64 4360 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 4361 case sgi of
adamc@64 4362 L'.SgiConAbs (x, n, k) =>
adamc@64 4363 let
adamc@64 4364 val (cons, x) =
adamc@64 4365 if SS.member (cons, x) then
adamc@64 4366 (cons, "?" ^ x)
adamc@64 4367 else
adamc@64 4368 (SS.add (cons, x), x)
adamc@64 4369 in
adamc@64 4370 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4371 end
adamc@64 4372 | L'.SgiCon (x, n, k, c) =>
adamc@64 4373 let
adamc@64 4374 val (cons, x) =
adamc@64 4375 if SS.member (cons, x) then
adamc@64 4376 (cons, "?" ^ x)
adamc@64 4377 else
adamc@64 4378 (SS.add (cons, x), x)
adamc@64 4379 in
adamc@64 4380 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4381 end
adamc@805 4382 | L'.SgiDatatype dts =>
adamc@156 4383 let
adamc@805 4384 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 4385 let
adamc@805 4386 val (cons, x) =
adamc@805 4387 if SS.member (cons, x) then
adamc@805 4388 (cons, "?" ^ x)
adamc@156 4389 else
adamc@805 4390 (SS.add (cons, x), x)
adamc@805 4391
adamc@805 4392 val (xncs, vals) =
adamc@805 4393 ListUtil.foldlMap
adamc@805 4394 (fn ((x, n, t), vals) =>
adamc@805 4395 if SS.member (vals, x) then
adamc@805 4396 (("?" ^ x, n, t), vals)
adamc@805 4397 else
adamc@805 4398 ((x, n, t), SS.add (vals, x)))
adamc@805 4399 vals xncs
adamc@805 4400 in
adamc@805 4401 ((x, n, xs, xncs), (cons, vals))
adamc@805 4402 end
adamc@805 4403
adamc@805 4404 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 4405 in
adamc@805 4406 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4407 end
adamc@191 4408 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 4409 let
adamc@156 4410 val (cons, x) =
adamc@156 4411 if SS.member (cons, x) then
adamc@156 4412 (cons, "?" ^ x)
adamc@156 4413 else
adamc@156 4414 (SS.add (cons, x), x)
adamc@156 4415 in
adamc@191 4416 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4417 end
adamc@64 4418 | L'.SgiVal (x, n, c) =>
adamc@64 4419 let
adamc@64 4420 val (vals, x) =
adamc@64 4421 if SS.member (vals, x) then
adamc@64 4422 (vals, "?" ^ x)
adamc@64 4423 else
adamc@64 4424 (SS.add (vals, x), x)
adamc@64 4425 in
adamc@64 4426 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4427 end
adamc@64 4428 | L'.SgiSgn (x, n, sgn) =>
adamc@64 4429 let
adamc@64 4430 val (sgns, x) =
adamc@64 4431 if SS.member (sgns, x) then
adamc@64 4432 (sgns, "?" ^ x)
adamc@64 4433 else
adamc@64 4434 (SS.add (sgns, x), x)
adamc@64 4435 in
adamc@64 4436 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4437 end
adamc@64 4438
adamc@64 4439 | L'.SgiStr (x, n, sgn) =>
adamc@64 4440 let
adamc@64 4441 val (strs, x) =
adamc@64 4442 if SS.member (strs, x) then
adamc@64 4443 (strs, "?" ^ x)
adamc@64 4444 else
adamc@64 4445 (SS.add (strs, x), x)
adamc@64 4446 in
adamc@64 4447 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 4448 end
adamc@203 4449 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 4450 | L'.SgiClassAbs (x, n, k) =>
adamc@211 4451 let
adamc@211 4452 val (cons, x) =
adamc@211 4453 if SS.member (cons, x) then
adamc@211 4454 (cons, "?" ^ x)
adamc@211 4455 else
adamc@211 4456 (SS.add (cons, x), x)
adamc@211 4457 in
adamc@563 4458 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 4459 end
adamc@563 4460 | L'.SgiClass (x, n, k, c) =>
adamc@211 4461 let
adamc@211 4462 val (cons, x) =
adamc@211 4463 if SS.member (cons, x) then
adamc@211 4464 (cons, "?" ^ x)
adamc@211 4465 else
adamc@211 4466 (SS.add (cons, x), x)
adamc@211 4467 in
adamc@563 4468 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 4469 end)
adamc@64 4470
adamc@63 4471 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 4472 in
adamc@83 4473 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 4474 end
adamc@31 4475 | L.StrVar x =>
adamc@31 4476 (case E.lookupStr env x of
adamc@31 4477 NONE =>
adamc@31 4478 (strError env (UnboundStr (loc, x));
adamc@83 4479 (strerror, sgnerror, []))
adamc@83 4480 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 4481 | L.StrProj (str, x) =>
adamc@34 4482 let
adamc@83 4483 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 4484 in
adamc@34 4485 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 4486 NONE => (strError env (UnboundStr (loc, x));
adamc@83 4487 (strerror, sgnerror, []))
adamc@83 4488 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 4489 end
adamc@41 4490 | L.StrFun (m, dom, ranO, str) =>
adamc@41 4491 let
adamc@83 4492 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 4493 val (env', n) = E.pushStrNamed env m dom'
adamc@834 4494 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 4495 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 4496
adamc@83 4497 val (formal, gs3) =
adamc@41 4498 case ranO of
adamc@83 4499 NONE => (actual, [])
adamc@41 4500 | SOME ran =>
adamc@41 4501 let
adamc@834 4502 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 4503 in
adamc@1000 4504 subSgn env' loc actual ran';
adamc@83 4505 (ran', gs)
adamc@41 4506 end
adamc@41 4507 in
adamc@41 4508 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 4509 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 4510 enD gs1 @ gs2 @ enD gs3)
adamc@41 4511 end
adamc@44 4512 | L.StrApp (str1, str2) =>
adamc@44 4513 let
adamc@83 4514 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 4515 val str2 =
adamc@325 4516 case sgn1 of
adamc@325 4517 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275 4518 let
adamc@1275 4519 val s = wildifyStr env (str2, dom)
adamc@1275 4520 in
adamc@1275 4521 (*Print.preface ("Wild", SourcePrint.p_str s);*)
adamc@1275 4522 s
adamc@1275 4523 end
adamc@325 4524 | _ => str2
adamc@83 4525 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270 4526 in
adamc@44 4527 case #1 (hnormSgn env sgn1) of
adamc@83 4528 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4529 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 4530 (subSgn env loc sgn2 dom;
adamc@44 4531 case #1 (hnormSgn env ran) of
adamc@83 4532 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4533 | L'.SgnConst sgis =>
adam@1968 4534 let
adam@1968 4535 (* This code handles a tricky case that led to a very nasty bug.
adam@1968 4536 * An invariant about signatures of elaborated modules is that no
adam@1968 4537 * identifier that could appear directly in a program is defined
adam@1968 4538 * twice. We add "?" in front of identifiers where necessary to
adam@1968 4539 * maintain the invariant, but the code below, to extend a functor
adam@1968 4540 * body with a binding for the functor argument, wasn't written
adam@1968 4541 * with the invariant in mind. Luckily for us, references to
adam@1968 4542 * an identifier later within a signature work by globally
adam@1968 4543 * unique index, so we just need to change the string name in the
adam@1989 4544 * new declaration.
adam@1989 4545 *
adam@1989 4546 * ~~~ A few days later.... ~~~
adam@1989 4547 * This is trickier than I thought! We might need to add
adam@1989 4548 * arbitarily many question marks before the module name to
adam@1989 4549 * avoid a clash, since some other code might depend on
adam@1989 4550 * question-mark identifiers generated previously by this
adam@1989 4551 * very code fragment. *)
adam@1989 4552 fun mungeName m =
adam@1968 4553 if List.exists (fn (L'.SgiStr (x, _, _), _) => x = m
adam@1968 4554 | _ => false) sgis then
adam@1989 4555 mungeName ("?" ^ m)
adam@1968 4556 else
adam@1968 4557 m
adam@1989 4558
adam@1989 4559 val m = mungeName m
adam@1968 4560 in
adam@1968 4561 ((L'.StrApp (str1', str2'), loc),
adam@1968 4562 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adam@1968 4563 gs1 @ gs2)
adam@1968 4564 end
adamc@44 4565 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 4566 | _ => (strError env (NotFunctor sgn1);
adamc@83 4567 (strerror, sgnerror, []))
adamc@44 4568 end
adamc@31 4569
adamc@987 4570 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 4571
adam@1732 4572 fun elabFile basis basis_tm topStr topSgn top_tm env file =
adamc@56 4573 let
adam@1737 4574 val () = ModDb.snapshot ()
adam@1737 4575
adamc@713 4576 val () = mayDelay := true
adamc@713 4577 val () = delayedUnifs := []
adamc@830 4578 val () = delayedExhaustives := []
adamc@713 4579
adam@1733 4580 val d = (L.DFfiStr ("Basis", (L.SgnConst basis, ErrorMsg.dummySpan), SOME basis_tm), ErrorMsg.dummySpan)
adam@1732 4581 val (basis_n, env', sgn) =
adam@1733 4582 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732 4583 NONE =>
adam@1732 4584 let
adam@1732 4585 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adam@1732 4586 val () = case gs of
adam@1732 4587 [] => ()
adam@1732 4588 | _ => (app (fn (_, env, _, c1, c2) =>
adam@1732 4589 prefaces "Unresolved"
adam@1732 4590 [("c1", p_con env c1),
adam@1732 4591 ("c2", p_con env c2)]) gs;
adam@1732 4592 raise Fail "Unresolved disjointness constraints in Basis")
adam@1732 4593
adam@1732 4594 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adam@1732 4595 in
adam@1732 4596 ModDb.insert ((L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan), basis_tm);
adam@1732 4597 (basis_n, env', sgn)
adam@1732 4598 end
adam@1732 4599 | SOME (d' as (L'.DFfiStr (_, basis_n, sgn), _)) =>
adam@1732 4600 (basis_n, E.pushStrNamedAs env "Basis" basis_n sgn, sgn)
adam@1732 4601 | _ => raise Fail "Elaborate: Basis impossible"
adam@1732 4602
adamc@210 4603 val () = basis_r := basis_n
adamc@628 4604 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 4605
adamc@56 4606 fun discoverC r x =
adamc@56 4607 case E.lookupC env' x of
adamc@56 4608 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 4609 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 4610 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 4611
adamc@56 4612 val () = discoverC int "int"
adamc@56 4613 val () = discoverC float "float"
adamc@56 4614 val () = discoverC string "string"
adamc@821 4615 val () = discoverC char "char"
adamc@203 4616 val () = discoverC table "sql_table"
adamc@56 4617
adam@1732 4618 val d = (L.DStr ("Top", SOME (L.SgnConst topSgn, ErrorMsg.dummySpan),
adam@1732 4619 SOME (if Time.< (top_tm, basis_tm) then basis_tm else top_tm),
adam@1868 4620 (L.StrConst topStr, ErrorMsg.dummySpan), false), ErrorMsg.dummySpan)
adam@1732 4621 val (top_n, env', topSgn, topStr) =
adam@1733 4622 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732 4623 NONE =>
adam@1732 4624 let
adam@1732 4625 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adam@1732 4626 val () = case gs of
adam@1732 4627 [] => ()
adam@1732 4628 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adam@1732 4629 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adam@1732 4630
adam@1732 4631 val () = case gs of
adam@1732 4632 [] => ()
adam@1732 4633 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1732 4634 (case D.prove env denv (c1, c2, loc) of
adam@1732 4635 [] => ()
adam@1732 4636 | _ =>
adam@1732 4637 (prefaces "Unresolved constraint in top.ur"
adam@1732 4638 [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1732 4639 ("c1", p_con env c1),
adam@1732 4640 ("c2", p_con env c2)];
adam@1732 4641 raise Fail "Unresolved constraint in top.ur"))
adam@1732 4642 | TypeClass (env, c, r, loc) =>
adam@1732 4643 let
adam@1732 4644 val c = normClassKey env c
adam@1732 4645 in
adam@1732 4646 case resolveClass env c of
adam@1732 4647 SOME e => r := SOME e
adam@1732 4648 | NONE => expError env (Unresolvable (loc, c))
adam@1732 4649 end) gs
adam@1732 4650
adam@1732 4651 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adam@1732 4652
adam@1732 4653 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adam@1732 4654 in
adam@1732 4655 ModDb.insert ((L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan), top_tm);
adam@1732 4656 (top_n, env', topSgn, topStr)
adam@1732 4657 end
adam@1732 4658 | SOME (d' as (L'.DStr (_, top_n, topSgn, topStr), _)) =>
adam@1732 4659 (top_n, E.declBinds env' d', topSgn, topStr)
adam@1732 4660 | _ => raise Fail "Elaborate: Top impossible"
adam@1732 4661
adamc@633 4662 val () = top_r := top_n
adamc@325 4663
adamc@628 4664 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 4665
adam@1883 4666 fun elabDecl' x =
adam@1883 4667 (resetKunif ();
adam@1883 4668 resetCunif ();
adam@1883 4669 elabDecl x)
adam@1883 4670
adam@1883 4671 val (file, (env'', _, gs)) = ListUtil.foldlMapConcat elabDecl' (env', D.empty, []) file
adamc@753 4672
adamc@777 4673 fun oneSummaryRound () =
adamc@777 4674 if ErrorMsg.anyErrors () then
adamc@777 4675 ()
adamc@777 4676 else
adamc@777 4677 let
adamc@777 4678 val delayed = !delayedUnifs
adamc@777 4679 in
adamc@777 4680 delayedUnifs := [];
adamc@777 4681 app (fn (loc, env, k, s1, s2) =>
adamc@777 4682 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 4683 delayed
adamc@777 4684 end
adam@1576 4685
adam@1576 4686 val checkConstraintErrors = ref (fn () => ())
adam@1723 4687 fun stopHere () = not (!unifyMore) andalso ErrorMsg.anyErrors ()
adamc@56 4688 in
adamc@777 4689 oneSummaryRound ();
adamc@753 4690
adam@1723 4691 if stopHere () then
adamc@753 4692 ()
adamc@753 4693 else
adamc@753 4694 let
adam@1767 4695 fun solver (gs : constraint list) =
adamc@753 4696 let
adamc@753 4697 val (gs, solved) =
adamc@753 4698 ListUtil.foldlMapPartial
adam@1767 4699 (fn (g : constraint, solved) =>
adamc@753 4700 case g of
adamc@753 4701 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 4702 (case D.prove env denv (c1, c2, loc) of
adamc@753 4703 [] => (NONE, true)
adamc@753 4704 | _ => (SOME g, solved))
adamc@753 4705 | TypeClass (env, c, r, loc) =>
adamc@753 4706 let
adamc@753 4707 fun default () = (SOME g, solved)
adam@1767 4708
adam@1767 4709 fun resolver r c =
adam@1767 4710 let
adam@1767 4711 val c = normClassKey env c
adam@1767 4712 in
adam@1767 4713 case resolveClass env c of
adam@1767 4714 SOME e => (r := SOME e;
adam@1767 4715 (NONE, true))
adam@1767 4716 | NONE =>
adam@1767 4717 case #1 (hnormCon env c) of
adam@1767 4718 L'.CApp (f, x) =>
adam@1767 4719 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adam@1767 4720 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adam@1767 4721 (case #1 (hnormCon env f) of
adam@1767 4722 L'.CModProj (top_n', [], "folder") =>
adam@1767 4723 if top_n' = top_n then
adam@1767 4724 let
adam@1767 4725 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adam@1767 4726 val e = (L'.EKApp (e, k), loc)
adam@1767 4727
adam@1767 4728 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adam@1767 4729 let
adam@1767 4730 val e = (L'.EModProj (top_n, ["Folder"],
adam@1767 4731 "cons"), loc)
adam@1767 4732 val e = (L'.EKApp (e, k), loc)
adam@1767 4733 val e = (L'.ECApp (e,
adam@1767 4734 (L'.CRecord (k, xcs),
adam@1767 4735 loc)), loc)
adam@1767 4736 val e = (L'.ECApp (e, x), loc)
adam@1767 4737 val e = (L'.ECApp (e, c), loc)
adam@1767 4738 val e = (L'.EApp (e, folder), loc)
adam@1767 4739 in
adam@1767 4740 (e, (x, c) :: xcs)
adam@1767 4741 end)
adam@1767 4742 (e, []) xcs
adam@1767 4743 in
adam@1767 4744 (r := SOME folder;
adam@1767 4745 (NONE, true))
adam@1767 4746 end
adam@1767 4747 else
adam@1767 4748 default ()
adam@1767 4749 | _ => default ())
adam@1767 4750 | _ => default ())
adam@1767 4751
adam@1767 4752 | L'.TRecord c' =>
adam@1767 4753 (case #1 (hnormCon env c') of
adam@1767 4754 L'.CRecord (_, xts) =>
adam@1767 4755 let
adam@1767 4756 val witnesses = map (fn (x, t) =>
adam@1767 4757 let
adam@1767 4758 val r = ref NONE
adam@1767 4759 val (opt, _) = resolver r t
adam@1767 4760 in
adam@1767 4761 case opt of
adam@1767 4762 SOME _ => NONE
adam@1767 4763 | NONE =>
adam@1767 4764 case !r of
adam@1767 4765 NONE => NONE
adam@1767 4766 | SOME e =>
adam@1767 4767 SOME (x, e, t)
adam@1767 4768 end) xts
adam@1767 4769 in
adam@1767 4770 if List.all Option.isSome witnesses then
adam@1767 4771 (r := SOME (L'.ERecord (map valOf witnesses), loc);
adam@1767 4772 (NONE, true))
adam@1767 4773 else
adam@1767 4774 (SOME g, solved)
adam@1767 4775 end
adam@1767 4776 | _ => (SOME g, solved))
adam@1767 4777
adam@1767 4778 | _ => default ()
adam@1767 4779 end
adamc@753 4780 in
adam@1767 4781 resolver r c
adamc@753 4782 end)
adamc@753 4783 false gs
adamc@753 4784 in
adamc@753 4785 case (gs, solved) of
adamc@753 4786 ([], _) => ()
adamc@777 4787 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4788 | _ =>
adam@1576 4789 checkConstraintErrors :=
adam@1576 4790 (fn () => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1576 4791 let
adam@1576 4792 val c1' = ElabOps.hnormCon env c1
adam@1576 4793 val c2' = ElabOps.hnormCon env c2
adam@1576 4794
adam@1576 4795 fun isUnif (c, _) =
adam@1576 4796 case c of
adam@1576 4797 L'.CUnif _ => true
adam@1576 4798 | _ => false
adam@1576 4799
adam@1576 4800 fun maybeAttr (c, _) =
adam@1576 4801 case c of
adam@1576 4802 L'.CRecord ((L'.KType, _), xts) => true
adam@1576 4803 | _ => false
adam@1576 4804 in
adam@1576 4805 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adam@1576 4806 eprefaces' [("Con 1", p_con env c1),
adam@1576 4807 ("Con 2", p_con env c2),
adam@1576 4808 ("Hnormed 1", p_con env c1'),
adam@1576 4809 ("Hnormed 2", p_con env c2')]
adam@1576 4810
adam@1576 4811 (*app (fn (loc, env, k, s1, s2) =>
adam@1576 4812 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1576 4813 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1576 4814 (!delayedUnifs);*)
adam@1576 4815 end
adam@1576 4816 | TypeClass (env, c, r, loc) =>
adam@1742 4817 let
adam@1742 4818 val c = normClassKey env c
adam@1742 4819 in
adam@1742 4820 case resolveClass env c of
adam@1767 4821 SOME e => r := SOME e
adam@1742 4822 | NONE => expError env (Unresolvable (loc, c))
adam@1742 4823 end)
adam@1576 4824 gs)
adamc@753 4825 end
adamc@753 4826 in
adamc@753 4827 solver gs
adamc@753 4828 end;
adamc@753 4829
adamc@713 4830 mayDelay := false;
adamc@713 4831
adam@1723 4832 if stopHere () then
adamc@777 4833 ()
adamc@777 4834 else
adamc@777 4835 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4836 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adam@1719 4837 handle CUnify' (env', err) => (ErrorMsg.errorAt loc "Error in final record unification";
adam@1719 4838 cunifyError env' err;
adam@1719 4839 case !reducedSummaries of
adam@1719 4840 NONE => ()
adam@1719 4841 | SOME (s1, s2) =>
adam@1719 4842 (ErrorMsg.errorAt loc "Stuck unifying these records after canceling matching pieces:";
adam@1719 4843 eprefaces' [("Have", s1),
adam@1719 4844 ("Need", s2)])))
adamc@777 4845 (!delayedUnifs);
adamc@777 4846 delayedUnifs := []);
adamc@713 4847
adam@1723 4848 if stopHere () then
adam@1346 4849 ()
adam@1346 4850 else
adam@1584 4851 if List.exists kunifsInDecl file then
adam@1584 4852 case U.File.findDecl kunifsInDecl file of
adam@1584 4853 NONE => ()
adam@1584 4854 | SOME d => declError env'' (KunifsRemain [d])
adam@1584 4855 else
adam@1584 4856 ();
adam@1345 4857
adam@1723 4858 if stopHere () then
adam@1346 4859 ()
adam@1346 4860 else
adam@1584 4861 if List.exists cunifsInDecl file then
adam@1584 4862 case U.File.findDecl cunifsInDecl file of
adam@1584 4863 NONE => ()
adam@1584 4864 | SOME d => declError env'' (CunifsRemain [d])
adam@1584 4865 else
adam@1584 4866 ();
adamc@750 4867
adam@1723 4868 if stopHere () then
adamc@830 4869 ()
adamc@830 4870 else
adamc@837 4871 app (fn all as (env, _, _, loc) =>
adamc@830 4872 case exhaustive all of
adamc@830 4873 NONE => ()
adamc@830 4874 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4875 (!delayedExhaustives);
adamc@830 4876
adam@1723 4877 if stopHere () then
adam@1576 4878 ()
adam@1576 4879 else
adam@1576 4880 !checkConstraintErrors ();
adam@1576 4881
adamc@799 4882 (*preface ("file", p_file env' file);*)
adam@1531 4883
adam@1745 4884 if !dumpTypes orelse (!dumpTypesOnError andalso ErrorMsg.anyErrors ()) then
adam@1531 4885 let
adam@1531 4886 open L'
adam@1531 4887 open Print.PD
adam@1531 4888 open Print
adam@1531 4889
adam@1715 4890 fun p_con env c = ElabPrint.p_con env (ElabOps.reduceCon env c)
adam@1715 4891
adam@1531 4892 fun dumpDecl (d, env) =
adam@1531 4893 case #1 d of
adam@1531 4894 DCon (x, _, k, _) => (print (box [string x,
adam@1531 4895 space,
adam@1531 4896 string "::",
adam@1531 4897 space,
adam@1531 4898 p_kind env k,
adam@1531 4899 newline,
adam@1531 4900 newline]);
adam@1531 4901 E.declBinds env d)
adam@1531 4902 | DVal (x, _, t, _) => (print (box [string x,
adam@1531 4903 space,
adam@1531 4904 string ":",
adam@1531 4905 space,
adam@1531 4906 p_con env t,
adam@1531 4907 newline,
adam@1531 4908 newline]);
adam@1531 4909 E.declBinds env d)
adam@1531 4910 | DValRec vis => (app (fn (x, _, t, _) => print (box [string x,
adam@1531 4911 space,
adam@1531 4912 string ":",
adam@1531 4913 space,
adam@1531 4914 p_con env t,
adam@1531 4915 newline,
adam@1531 4916 newline])) vis;
adam@1531 4917 E.declBinds env d)
adam@1531 4918 | DStr (x, _, _, str) => (print (box [string ("<" ^ x ^ ">"),
adam@1531 4919 newline,
adam@1531 4920 newline]);
adam@1531 4921 dumpStr (str, env);
adam@1531 4922 print (box [string ("</" ^ x ^ ">"),
adam@1531 4923 newline,
adam@1531 4924 newline]);
adam@1531 4925 E.declBinds env d)
adam@1531 4926 | _ => E.declBinds env d
adam@1531 4927
adam@1531 4928 and dumpStr (str, env) =
adam@1531 4929 case #1 str of
adam@1531 4930 StrConst ds => ignore (foldl dumpDecl env ds)
adam@1531 4931 | _ => ()
adam@1531 4932 in
adam@1531 4933 ignore (foldl dumpDecl env' file)
adam@1531 4934 end
adam@1531 4935 else
adam@1531 4936 ();
adam@1737 4937
adam@1737 4938 if ErrorMsg.anyErrors () then
adam@1737 4939 ModDb.revert ()
adam@1737 4940 else
adam@1737 4941 ();
adam@1912 4942
adam@1912 4943 (*Print.preface("File", ElabPrint.p_file env file);*)
adam@1345 4944
adamc@325 4945 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4946 :: ds
adamc@325 4947 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4948 :: ds' @ file
adamc@56 4949 end
adamc@2 4950
adamc@2 4951 end