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annotate src/elaborate.sml @ 2109:f42fea631c1d

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Improve wildification for records of type-class witnesses
author Adam Chlipala <adam@chlipala.net>
date Wed, 28 Jan 2015 08:47:04 -0500
parents 32e2752390ad
children 010ce27228f1
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
adam@2092 2018 val consEqSimple =
adam@2092 2019 let
adam@2092 2020 fun ces env (c1 : L'.con, c2 : L'.con) =
adam@2092 2021 let
adam@2092 2022 val c1 = hnormCon env c1
adam@2092 2023 val c2 = hnormCon env c2
adam@2092 2024 in
adam@2092 2025 case (#1 c1, #1 c2) of
adam@2092 2026 (L'.CRel n1, L'.CRel n2) => n1 = n2
adam@2092 2027 | (L'.CNamed n1, L'.CNamed n2) =>
adam@2092 2028 n1 = n2 orelse
adam@2092 2029 (case #3 (E.lookupCNamed env n1) of
adam@2092 2030 SOME (L'.CNamed n2', _) => n2' = n1
adam@2092 2031 | _ => false)
adam@2092 2032 | (L'.CModProj n1, L'.CModProj n2) => n1 = n2
adam@2092 2033 | (L'.CApp (f1, x1), L'.CApp (f2, x2)) => ces env (f1, f2) andalso ces env (x1, x2)
adam@2092 2034 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, _, c2)) => ces (E.pushCRel env x1 k1) (c1, c2)
adam@2092 2035 | (L'.CName x1, L'.CName x2) => x1 = x2
adam@2092 2036 | (L'.CRecord (_, xts1), L'.CRecord (_, xts2)) =>
adam@2092 2037 ListPair.all (fn ((x1, t1), (x2, t2)) =>
adam@2092 2038 ces env (x1, x2) andalso ces env (t2, t2)) (xts1, xts2)
adam@2092 2039 | (L'.CConcat (x1, y1), L'.CConcat (x2, y2)) =>
adam@2092 2040 ces env (x1, x2) andalso ces env (y1, y2)
adam@2092 2041 | (L'.CMap _, L'.CMap _) => true
adam@2092 2042 | (L'.CUnit, L'.CUnit) => true
adam@2092 2043 | (L'.CTuple cs1, L'.CTuple cs2) => ListPair.all (ces env) (cs1, cs2)
adam@2092 2044 | (L'.CProj (c1, n1), L'.CProj (c2, n2)) => ces env (c1, c2) andalso n1 = n2
adam@2092 2045 | (L'.CUnif (_, _, _, _, r1), L'.CUnif (_, _, _, _, r2)) => r1 = r2
adam@2101 2046
adam@2101 2047 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) => ces env (d1, d2) andalso ces env (r1, r2)
adam@2101 2048 | (L'.TRecord c1, L'.TRecord c2) => ces env (c1, c2)
adam@2101 2049
adam@2092 2050 | _ => false
adam@2092 2051 end
adam@2092 2052 in
adam@2092 2053 ces
adam@2092 2054 end
adam@2092 2055
adam@2092 2056
adamc@92 2057 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 2058 let
adamc@848 2059 (*val () = eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)]*)
adamc@514 2060 (*val befor = Time.now ()*)
adamc@280 2061
adamc@280 2062 val r = case e of
adamc@91 2063 L.EAnnot (e, t) =>
adamc@91 2064 let
adamc@91 2065 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 2066 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 2067 in
adamc@628 2068 checkCon env e' et t';
adamc@628 2069 (e', t', gs1 @ enD gs2)
adamc@91 2070 end
adamc@34 2071
adamc@91 2072 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@403 2073 | L.EVar ([], s, infer) =>
adamc@91 2074 (case E.lookupE env s of
adamc@91 2075 E.NotBound =>
adamc@91 2076 (expError env (UnboundExp (loc, s));
adamc@91 2077 (eerror, cerror, []))
adamc@629 2078 | E.Rel (n, t) => elabHead (env, denv) infer (L'.ERel n, loc) t
adamc@629 2079 | E.Named (n, t) => elabHead (env, denv) infer (L'.ENamed n, loc) t)
adamc@403 2080 | L.EVar (m1 :: ms, s, infer) =>
adamc@91 2081 (case E.lookupStr env m1 of
adamc@91 2082 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 2083 (eerror, cerror, []))
adamc@91 2084 | SOME (n, sgn) =>
adamc@91 2085 let
adamc@91 2086 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 2087 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 2088 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 2089 (strerror, sgnerror))
adamc@91 2090 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 2091 ((L'.StrVar n, loc), sgn) ms
adamc@10 2092
adamc@91 2093 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 2094 NONE => (expError env (UnboundExp (loc, s));
adamc@91 2095 cerror)
adamc@91 2096 | SOME t => t
adamc@91 2097 in
adamc@629 2098 elabHead (env, denv) infer (L'.EModProj (n, ms, s), loc) t
adamc@91 2099 end)
adamc@86 2100
adamc@349 2101 | L.EWild =>
adamc@210 2102 let
adamc@349 2103 val r = ref NONE
adam@1639 2104 val c = cunif env (loc, (L'.KType, loc))
adamc@210 2105 in
adamc@349 2106 ((L'.EUnif r, loc), c, [TypeClass (env, c, r, loc)])
adamc@210 2107 end
adamc@210 2108
adamc@91 2109 | L.EApp (e1, e2) =>
adamc@91 2110 let
adamc@91 2111 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1093 2112
adamc@403 2113 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@71 2114
adam@1639 2115 val dom = cunif env (loc, ktype)
adam@1639 2116 val ran = cunif env (loc, ktype)
adamc@838 2117 val t = (L'.TFun (dom, ran), loc)
adamc@1093 2118
adamc@1093 2119 val () = checkCon env e1' t1 t
adamc@1093 2120 val () = checkCon env e2' t2 dom
adamc@1093 2121
adamc@1093 2122 val ef = (L'.EApp (e1', e2'), loc)
adamc@1093 2123 val (ef, et, gs3) =
adamc@1093 2124 case findHead e1 e1' of
adam@1591 2125 NONE => (ef, (#1 (chaseUnifs ran), loc), [])
adamc@1093 2126 | SOME infer => elabHead (env, denv) infer ef ran
adamc@91 2127 in
adamc@1093 2128 (ef, et, gs1 @ gs2 @ gs3)
adamc@91 2129 end
adamc@91 2130 | L.EAbs (x, to, e) =>
adamc@91 2131 let
adamc@91 2132 val (t', gs1) = case to of
adam@1639 2133 NONE => (cunif env (loc, ktype), [])
adamc@91 2134 | SOME t =>
adamc@91 2135 let
adamc@91 2136 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 2137 in
adamc@91 2138 checkKind env t' tk ktype;
adamc@91 2139 (t', gs)
adamc@91 2140 end
adamc@467 2141 val dom = normClassConstraint env t'
adamc@467 2142 val (e', et, gs2) = elabExp (E.pushERel env x dom, denv) e
adamc@91 2143 in
adamc@91 2144 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 2145 (L'.TFun (t', et), loc),
adamc@467 2146 enD gs1 @ gs2)
adamc@91 2147 end
adamc@91 2148 | L.ECApp (e, c) =>
adamc@91 2149 let
adamc@91 2150 val (e', et, gs1) = elabExp (env, denv) e
adamc@1093 2151
adamc@328 2152 val oldEt = et
adamc@403 2153 val (c', ck, gs2) = elabCon (env, denv) c
adamc@628 2154 val (et', _) = hnormCon env et
adamc@91 2155 in
adamc@91 2156 case et' of
adamc@91 2157 L'.CError => (eerror, cerror, [])
adamc@328 2158 | L'.TCFun (_, x, k, eb) =>
adamc@91 2159 let
adamc@91 2160 val () = checkKind env c' ck k
adam@1303 2161 val eb' = subConInCon env (0, c') eb
adamc@1093 2162
adamc@1093 2163 val ef = (L'.ECApp (e', c'), loc)
adamc@1093 2164 val (ef, eb', gs3) =
adamc@1093 2165 case findHead e e' of
adamc@1093 2166 NONE => (ef, eb', [])
adamc@1093 2167 | SOME infer => elabHead (env, denv) infer ef eb'
adamc@91 2168 in
adamc@328 2169 (*prefaces "Elab ECApp" [("e", SourcePrint.p_exp eAll),
adamc@328 2170 ("et", p_con env oldEt),
adamc@328 2171 ("x", PD.string x),
adamc@328 2172 ("eb", p_con (E.pushCRel env x k) eb),
adamc@328 2173 ("c", p_con env c'),
adamc@328 2174 ("eb'", p_con env eb')];*)
adam@1591 2175 (ef, (#1 eb', loc), gs1 @ enD gs2 @ gs3)
adamc@91 2176 end
adamc@91 2177
adamc@91 2178 | _ =>
adamc@91 2179 (expError env (WrongForm ("constructor function", e', et));
adamc@91 2180 (eerror, cerror, []))
adamc@91 2181 end
adamc@91 2182 | L.ECAbs (expl, x, k, e) =>
adamc@91 2183 let
adamc@91 2184 val expl' = elabExplicitness expl
adamc@623 2185 val k' = elabKind env k
adamc@328 2186
adamc@328 2187 val env' = E.pushCRel env x k'
adamc@328 2188 val (e', et, gs) = elabExp (env', D.enter denv) e
adamc@91 2189 in
adamc@91 2190 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 2191 (L'.TCFun (expl', x, k', et), loc),
adamc@91 2192 gs)
adamc@91 2193 end
adamc@623 2194 | L.EKAbs (x, e) =>
adamc@623 2195 let
adamc@623 2196 val env' = E.pushKRel env x
adamc@623 2197 val (e', et, gs) = elabExp (env', denv) e
adamc@623 2198 in
adamc@623 2199 ((L'.EKAbs (x, e'), loc),
adamc@623 2200 (L'.TKFun (x, et), loc),
adamc@623 2201 gs)
adamc@623 2202 end
adamc@91 2203
adamc@91 2204 | L.EDisjoint (c1, c2, e) =>
adamc@91 2205 let
adamc@91 2206 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 2207 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 2208
adam@1639 2209 val ku1 = kunif env loc
adam@1639 2210 val ku2 = kunif env loc
adamc@91 2211
adamc@628 2212 val denv' = D.assert env denv (c1', c2')
adamc@628 2213 val (e', t, gs3) = elabExp (env, denv') e
adamc@91 2214 in
adamc@91 2215 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 2216 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 2217
adamc@628 2218 (e', (L'.TDisjoint (c1', c2', t), loc), enD gs1 @ enD gs2 @ gs3)
adamc@91 2219 end
adamc@629 2220 | L.EDisjointApp e =>
adamc@629 2221 let
adamc@629 2222 val (e', t, gs1) = elabExp (env, denv) e
adamc@629 2223
adam@1639 2224 val k1 = kunif env loc
adam@1639 2225 val c1 = cunif env (loc, (L'.KRecord k1, loc))
adam@1639 2226 val k2 = kunif env loc
adam@1639 2227 val c2 = cunif env (loc, (L'.KRecord k2, loc))
adam@1639 2228 val t' = cunif env (loc, ktype)
adamc@629 2229 val () = checkCon env e' t (L'.TDisjoint (c1, c2, t'), loc)
adamc@629 2230 val gs2 = D.prove env denv (c1, c2, loc)
adamc@629 2231 in
adam@1591 2232 (e', (#1 (chaseUnifs t'), loc), enD gs2 @ gs1)
adamc@629 2233 end
adamc@91 2234
adam@2009 2235 | L.ERecord (xes, flex) =>
adamc@91 2236 let
adam@2009 2237 val () = if flex then
adam@2009 2238 expError env (IllegalFlex eAll)
adam@2009 2239 else
adam@2009 2240 ()
adam@2009 2241
adamc@91 2242 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 2243 let
adamc@91 2244 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 2245 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 2246 in
adamc@91 2247 checkKind env x' xk kname;
adamc@228 2248 ((x', e', et), enD gs1 @ gs2 @ gs)
adamc@91 2249 end)
adamc@91 2250 [] xes
adamc@91 2251
adamc@91 2252 val k = (L'.KType, loc)
adamc@91 2253
adamc@91 2254 fun prove (xets, gs) =
adamc@91 2255 case xets of
adamc@91 2256 [] => gs
adamc@91 2257 | (x, _, t) :: rest =>
adamc@91 2258 let
adamc@91 2259 val xc = (x, t)
adamc@91 2260 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 2261 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 2262 let
adamc@91 2263 val xc' = (x', t')
adamc@91 2264 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 2265 in
adamc@91 2266 D.prove env denv (r1, r2, loc) @ gs
adamc@91 2267 end)
adamc@91 2268 gs rest
adamc@91 2269 in
adamc@91 2270 prove (rest, gs)
adamc@91 2271 end
adamc@228 2272
adamc@228 2273 val gsD = List.mapPartial (fn Disjoint d => SOME d | _ => NONE) gs
adamc@228 2274 val gsO = List.filter (fn Disjoint _ => false | _ => true) gs
adamc@91 2275 in
adamc@255 2276 (*TextIO.print ("|gsO| = " ^ Int.toString (length gsO) ^ "\n");*)
adamc@91 2277 ((L'.ERecord xes', loc),
adamc@91 2278 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@228 2279 enD (prove (xes', gsD)) @ gsO)
adamc@91 2280 end
adamc@91 2281
adamc@91 2282 | L.EField (e, c) =>
adamc@91 2283 let
adamc@91 2284 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 2285 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 2286
adam@1639 2287 val ft = cunif env (loc, ktype)
adam@1639 2288 val rest = cunif env (loc, ktype_record)
adamc@91 2289 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2290 val () = checkCon env e' et
adamc@629 2291 (L'.TRecord (L'.CConcat (first, rest), loc), loc);
adamc@628 2292 val gs3 = D.prove env denv (first, rest, loc)
adamc@91 2293 in
adamc@628 2294 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ enD gs2 @ enD gs3)
adamc@91 2295 end
adamc@91 2296
adamc@445 2297 | L.EConcat (e1, e2) =>
adamc@339 2298 let
adamc@339 2299 val (e1', e1t, gs1) = elabExp (env, denv) e1
adamc@445 2300 val (e2', e2t, gs2) = elabExp (env, denv) e2
adamc@445 2301
adam@1639 2302 val r1 = cunif env (loc, ktype_record)
adam@1639 2303 val r2 = cunif env (loc, ktype_record)
adamc@445 2304
adamc@629 2305 val () = checkCon env e1' e1t (L'.TRecord r1, loc)
adamc@629 2306 val () = checkCon env e2' e2t (L'.TRecord r2, loc)
adamc@629 2307
adamc@628 2308 val gs3 = D.prove env denv (r1, r2, loc)
adamc@339 2309 in
adamc@445 2310 ((L'.EConcat (e1', r1, e2', r2), loc),
adamc@445 2311 (L'.TRecord ((L'.CConcat (r1, r2), loc)), loc),
adamc@628 2312 gs1 @ gs2 @ enD gs3)
adamc@339 2313 end
adamc@149 2314 | L.ECut (e, c) =>
adamc@149 2315 let
adamc@149 2316 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 2317 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 2318
adam@1639 2319 val ft = cunif env (loc, ktype)
adam@1639 2320 val rest = cunif env (loc, ktype_record)
adamc@149 2321 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@629 2322
adamc@629 2323 val () = checkCon env e' et
adamc@629 2324 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 2325
adamc@628 2326 val gs3 = D.prove env denv (first, rest, loc)
adamc@149 2327 in
adam@1299 2328 checkKind env c' ck kname;
adamc@228 2329 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2330 gs1 @ enD gs2 @ enD gs3)
adamc@149 2331 end
adamc@493 2332 | L.ECutMulti (e, c) =>
adamc@493 2333 let
adamc@493 2334 val (e', et, gs1) = elabExp (env, denv) e
adamc@493 2335 val (c', ck, gs2) = elabCon (env, denv) c
adamc@493 2336
adam@1639 2337 val rest = cunif env (loc, ktype_record)
adamc@629 2338
adamc@629 2339 val () = checkCon env e' et
adamc@629 2340 (L'.TRecord (L'.CConcat (c', rest), loc), loc)
adamc@493 2341
adamc@628 2342 val gs3 = D.prove env denv (c', rest, loc)
adamc@493 2343 in
adam@1299 2344 checkKind env c' ck (L'.KRecord ktype, loc);
adamc@493 2345 ((L'.ECutMulti (e', c', {rest = rest}), loc), (L'.TRecord rest, loc),
adamc@628 2346 gs1 @ enD gs2 @ enD gs3)
adamc@493 2347 end
adamc@149 2348
adamc@171 2349 | L.ECase (e, pes) =>
adamc@171 2350 let
adamc@171 2351 val (e', et, gs1) = elabExp (env, denv) e
adam@1639 2352 val result = cunif env (loc, (L'.KType, loc))
adamc@171 2353 val (pes', gs) = ListUtil.foldlMap
adamc@171 2354 (fn ((p, e), gs) =>
adamc@171 2355 let
adamc@628 2356 val ((p', pt), (env, _)) = elabPat (p, (env, SS.empty))
adamc@628 2357
adamc@629 2358 val (e', et', gs1) = elabExp (env, denv) e
adamc@171 2359 in
adamc@628 2360 checkPatCon env p' pt et;
adamc@629 2361 checkCon env e' et' result;
adamc@628 2362 ((p', e'), gs1 @ gs)
adamc@171 2363 end)
adamc@171 2364 gs1 pes
adamc@171 2365 in
adamc@819 2366 case exhaustive (env, et, map #1 pes', loc) of
adamc@819 2367 NONE => ()
adamc@830 2368 | SOME p => if !mayDelay then
adamc@830 2369 delayedExhaustives := (env, et, map #1 pes', loc) :: !delayedExhaustives
adamc@830 2370 else
adamc@830 2371 expError env (Inexhaustive (loc, p));
adamc@172 2372
adamc@628 2373 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs)
adamc@171 2374 end
adamc@447 2375
adamc@447 2376 | L.ELet (eds, e) =>
adamc@447 2377 let
adamc@447 2378 val (eds, (env, gs1)) = ListUtil.foldlMap (elabEdecl denv) (env, []) eds
adamc@447 2379 val (e, t, gs2) = elabExp (env, denv) e
adamc@447 2380 in
adamc@825 2381 ((L'.ELet (eds, e, t), loc), t, gs1 @ gs2)
adamc@447 2382 end
adamc@280 2383 in
adamc@819 2384 (*prefaces "/elabExp" [("e", SourcePrint.p_exp eAll)];*)
adamc@280 2385 r
adamc@91 2386 end
adamc@31 2387
adamc@628 2388 and elabEdecl denv (dAll as (d, loc), (env, gs)) =
adamc@447 2389 let
adamc@447 2390 val r =
adamc@447 2391 case d of
adamc@825 2392 L.EDVal (p, e) =>
adamc@447 2393 let
adamc@825 2394 val ((p', pt), (env', _)) = elabPat (p, (env, SS.empty))
adamc@825 2395 val (e', et, gs1) = elabExp (env, denv) e
adamc@825 2396
adamc@825 2397 val () = checkCon env e' et pt
adamc@825 2398
adam@1554 2399 val env' = E.patBinds env p'
adam@1554 2400 (* Redo to get proper detection of type class witnesses *)
adam@1554 2401
adamc@825 2402 val pt = normClassConstraint env pt
adamc@447 2403 in
adamc@830 2404 case exhaustive (env, et, [p'], loc) of
adamc@830 2405 NONE => ()
adamc@830 2406 | SOME p => if !mayDelay then
adamc@830 2407 delayedExhaustives := (env, et, [p'], loc) :: !delayedExhaustives
adamc@830 2408 else
adamc@830 2409 expError env (Inexhaustive (loc, p));
adamc@830 2410
adamc@825 2411 ((L'.EDVal (p', pt, e'), loc), (env', gs1 @ gs))
adamc@447 2412 end
adamc@447 2413 | L.EDValRec vis =>
adamc@447 2414 let
adamc@447 2415 fun allowable (e, _) =
adamc@447 2416 case e of
adamc@447 2417 L.EAbs _ => true
adamc@447 2418 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 2419 | L.EKAbs (_, e) => allowable e
adamc@447 2420 | L.EDisjoint (_, _, e) => allowable e
adamc@447 2421 | _ => false
adamc@447 2422
adamc@447 2423 val (vis, gs) = ListUtil.foldlMap
adamc@447 2424 (fn ((x, co, e), gs) =>
adamc@447 2425 let
adamc@447 2426 val (c', _, gs1) = case co of
adam@1639 2427 NONE => (cunif env (loc, ktype), ktype, [])
adamc@447 2428 | SOME c => elabCon (env, denv) c
adamc@447 2429 in
adamc@447 2430 ((x, c', e), enD gs1 @ gs)
adamc@447 2431 end) gs vis
adamc@447 2432
adamc@447 2433 val env = foldl (fn ((x, c', _), env) => E.pushERel env x c') env vis
adamc@447 2434
adamc@447 2435 val (vis, gs) = ListUtil.foldlMap (fn ((x, c', e), gs) =>
adamc@447 2436 let
adamc@447 2437 val (e', et, gs1) = elabExp (env, denv) e
adamc@447 2438 in
adamc@628 2439 checkCon env e' et c';
adamc@447 2440 if allowable e then
adamc@447 2441 ()
adamc@447 2442 else
adamc@447 2443 expError env (IllegalRec (x, e'));
adamc@628 2444 ((x, c', e'), gs1 @ gs)
adamc@447 2445 end) gs vis
adamc@447 2446 in
adamc@447 2447 ((L'.EDValRec vis, loc), (env, gs))
adamc@447 2448 end
adamc@447 2449 in
adamc@447 2450 r
adamc@447 2451 end
adamc@447 2452
adamc@42 2453 val hnormSgn = E.hnormSgn
adamc@31 2454
adamc@210 2455 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@338 2456 fun sequenceOf () = (L'.CModProj (!basis_r, [], "sql_sequence"), ErrorMsg.dummySpan)
adamc@754 2457 fun viewOf () = (L'.CModProj (!basis_r, [], "sql_view"), ErrorMsg.dummySpan)
adamc@754 2458 fun queryOf () = (L'.CModProj (!basis_r, [], "sql_query"), ErrorMsg.dummySpan)
adamc@459 2459 fun cookieOf () = (L'.CModProj (!basis_r, [], "http_cookie"), ErrorMsg.dummySpan)
adamc@718 2460 fun styleOf () = (L'.CModProj (!basis_r, [], "css_class"), ErrorMsg.dummySpan)
adamc@205 2461
adamc@469 2462 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@469 2463 case E.lookupStr env str of
adamc@469 2464 NONE => (strError env (UnboundStr (loc, str));
adamc@469 2465 denv)
adamc@469 2466 | SOME (n, sgn) =>
adamc@469 2467 let
adamc@469 2468 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@469 2469 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@469 2470 NONE => (strError env (UnboundStr (loc, m));
adamc@469 2471 (strerror, sgnerror))
adamc@469 2472 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@469 2473 ((L'.StrVar n, loc), sgn) strs
adamc@1030 2474
adamc@1030 2475 fun collect first (st, sgn) =
adamc@1030 2476 case E.projectConstraints env {sgn = sgn, str = st} of
adamc@1182 2477 NONE => []
adamc@1030 2478 | SOME cs =>
adamc@1030 2479 case #1 (hnormSgn env sgn) of
adamc@1030 2480 L'.SgnConst sgis =>
adamc@1030 2481 foldl (fn (sgi, cs) =>
adamc@1030 2482 case #1 sgi of
adamc@1030 2483 L'.SgiStr (x, _, _) =>
adamc@1030 2484 (case E.projectStr env {sgn = sgn, str = st, field = x} of
adamc@1030 2485 NONE => raise Fail "Elaborate: projectStr in collect"
adamc@1030 2486 | SOME sgn' =>
adamc@1030 2487 List.revAppend (collect false ((L'.StrProj (st, x), loc), sgn'),
adamc@1030 2488 cs))
adamc@1030 2489 | _ => cs) cs sgis
adamc@1030 2490 | _ => cs
adamc@469 2491 in
adamc@1030 2492 foldl (fn ((c1, c2), denv) =>
adamc@1030 2493 D.assert env denv (c1, c2)) denv (collect true (st, sgn))
adamc@469 2494 end
adamc@469 2495
adamc@88 2496 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@1270 2497 ((*Print.preface ("elabSgi", SourcePrint.p_sgn_item (sgi, loc));*)
adamc@1270 2498 case sgi of
adamc@1270 2499 L.SgiConAbs (x, k) =>
adamc@1270 2500 let
adamc@1270 2501 val k' = elabKind env k
adamc@1270 2502
adamc@1270 2503 val (env', n) = E.pushCNamed env x k' NONE
adamc@1270 2504 in
adamc@1270 2505 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@1270 2506 end
adamc@1270 2507
adamc@1270 2508 | L.SgiCon (x, ko, c) =>
adamc@1270 2509 let
adamc@1270 2510 val k' = case ko of
adam@1639 2511 NONE => kunif env loc
adamc@1270 2512 | SOME k => elabKind env k
adamc@1270 2513
adamc@1270 2514 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2515 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@1270 2516 in
adamc@1270 2517 checkKind env c' ck k';
adamc@1270 2518
adamc@1270 2519 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2520 end
adamc@1270 2521
adamc@1270 2522 | L.SgiDatatype dts =>
adamc@1270 2523 let
adamc@1270 2524 val k = (L'.KType, loc)
adamc@1270 2525
adamc@1270 2526 val (dts, env) = ListUtil.foldlMap (fn ((x, xs, xcs), env) =>
adamc@1270 2527 let
adamc@1270 2528 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2529 val (env, n) = E.pushCNamed env x k' NONE
adamc@1270 2530 in
adamc@1270 2531 ((x, n, xs, xcs), env)
adamc@1270 2532 end)
adamc@1270 2533 env dts
adamc@1270 2534
adamc@1270 2535 val (dts, env) = ListUtil.foldlMap
adamc@1270 2536 (fn ((x, n, xs, xcs), env) =>
adamc@1270 2537 let
adamc@1270 2538 val t = (L'.CNamed n, loc)
adamc@1270 2539 val nxs = length xs - 1
adamc@1270 2540 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@1270 2541 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@1270 2542
adamc@1270 2543 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@1270 2544 (E.pushCRel env' x k,
adamc@1270 2545 D.enter denv')) (env, denv) xs
adamc@1270 2546
adamc@1270 2547 val (xcs, (used, env, gs)) =
adamc@1270 2548 ListUtil.foldlMap
adamc@1270 2549 (fn ((x, to), (used, env, gs)) =>
adamc@1270 2550 let
adamc@1270 2551 val (to, t, gs') = case to of
adamc@1270 2552 NONE => (NONE, t, gs)
adamc@1270 2553 | SOME t' =>
adamc@1270 2554 let
adamc@1270 2555 val (t', tk, gs') =
adamc@1270 2556 elabCon (env', denv') t'
adamc@1270 2557 in
adamc@1270 2558 checkKind env' t' tk k;
adamc@1270 2559 (SOME t',
adamc@1270 2560 (L'.TFun (t', t), loc),
adamc@1270 2561 gs' @ gs)
adamc@1270 2562 end
adamc@1270 2563 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2564 t xs
adamc@1270 2565
adamc@1270 2566 val (env, n') = E.pushENamed env x t
adamc@1270 2567 in
adamc@1270 2568 if SS.member (used, x) then
adamc@1270 2569 strError env (DuplicateConstructor (x, loc))
adamc@1270 2570 else
adamc@1270 2571 ();
adamc@1270 2572 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@1270 2573 end)
adamc@1270 2574 (SS.empty, env, []) xcs
adamc@1270 2575 in
adamc@1270 2576 ((x, n, xs, xcs), E.pushDatatype env n xs xcs)
adamc@1270 2577 end)
adamc@1270 2578 env dts
adamc@1270 2579 in
adamc@1270 2580 ([(L'.SgiDatatype dts, loc)], (env, denv, gs))
adamc@1270 2581 end
adamc@1270 2582
adamc@1270 2583 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@1270 2584
adamc@1270 2585 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@1270 2586 (case E.lookupStr env m1 of
adamc@1270 2587 NONE => (strError env (UnboundStr (loc, m1));
adamc@1270 2588 ([], (env, denv, gs)))
adamc@1270 2589 | SOME (n, sgn) =>
adamc@1270 2590 let
adamc@1270 2591 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1270 2592 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@1270 2593 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@1270 2594 (strerror, sgnerror))
adamc@1270 2595 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1270 2596 ((L'.StrVar n, loc), sgn) ms
adamc@1270 2597 in
adamc@1270 2598 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@1270 2599 (L'.CModProj (n, ms, s), _) =>
adamc@1270 2600 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@1270 2601 NONE => (conError env (UnboundDatatype (loc, s));
adamc@1270 2602 ([], (env, denv, [])))
adamc@1270 2603 | SOME (xs, xncs) =>
adamc@1270 2604 let
adamc@1270 2605 val k = (L'.KType, loc)
adamc@1270 2606 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@1270 2607
adamc@1270 2608 val t = (L'.CModProj (n, ms, s), loc)
adamc@1270 2609 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@1270 2610 val env = E.pushDatatype env n' xs xncs
adamc@1270 2611
adamc@1270 2612 val t = (L'.CNamed n', loc)
adamc@1270 2613 val env = foldl (fn ((x, n, to), env) =>
adamc@805 2614 let
adamc@1270 2615 val t = case to of
adamc@1270 2616 NONE => t
adamc@1270 2617 | SOME t' => (L'.TFun (t', t), loc)
adamc@1270 2618
adamc@1270 2619 val t = foldr (fn (x, t) =>
adamc@1270 2620 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@1270 2621 t xs
adamc@805 2622 in
adamc@1270 2623 E.pushENamedAs env x n t
adamc@1270 2624 end) env xncs
adamc@1270 2625 in
adamc@1270 2626 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, []))
adamc@1270 2627 end)
adamc@1270 2628 | _ => (strError env (NotDatatype loc);
adamc@1270 2629 ([], (env, denv, [])))
adamc@1270 2630 end)
adamc@1270 2631
adamc@1270 2632 | L.SgiVal (x, c) =>
adamc@1270 2633 let
adamc@1270 2634 val (c', ck, gs') = elabCon (env, denv) c
adamc@1270 2635
adamc@1270 2636 val old = c'
adamc@1270 2637 val c' = normClassConstraint env c'
adamc@1270 2638 val (env', n) = E.pushENamed env x c'
adamc@1270 2639 in
adamc@1270 2640 (unifyKinds env ck ktype
adam@1719 2641 handle KUnify arg => strError env (NotType (loc, ck, arg)));
adamc@1270 2642
adamc@1270 2643 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@1270 2644 end
adamc@1270 2645
adamc@1270 2646 | L.SgiTable (x, c, pe, ce) =>
adamc@1270 2647 let
adamc@1270 2648 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@1270 2649
adamc@1270 2650 val (c', ck, gs') = elabCon (env, denv) c
adam@1639 2651 val pkey = cunif env (loc, cstK)
adam@1639 2652 val visible = cunif env (loc, cstK)
adam@1886 2653
adam@1886 2654 val x' = x ^ "_hidden_constraints"
adam@1886 2655 val (env', hidden_n) = E.pushCNamed env x' cstK NONE
adam@1886 2656 val hidden = (L'.CNamed hidden_n, loc)
adam@1886 2657
adam@1886 2658 val uniques = (L'.CConcat (visible, hidden), loc)
adamc@1270 2659
adamc@1270 2660 val ct = tableOf ()
adamc@1270 2661 val ct = (L'.CApp (ct, c'), loc)
adamc@1270 2662 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@1270 2663
adamc@1270 2664 val (pe', pet, gs'') = elabExp (env', denv) pe
adamc@1270 2665 val gs'' = List.mapPartial (fn Disjoint x => SOME x
adamc@707 2666 | _ => NONE) gs''
adamc@707 2667
adamc@1270 2668 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@1270 2669 val pst = (L'.CApp (pst, c'), loc)
adamc@1270 2670 val pst = (L'.CApp (pst, pkey), loc)
adamc@1270 2671
adamc@1270 2672 val (ce', cet, gs''') = elabExp (env', denv) ce
adamc@1270 2673 val gs''' = List.mapPartial (fn Disjoint x => SOME x
adamc@1270 2674 | _ => NONE) gs'''
adamc@1270 2675
adamc@1270 2676 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@1270 2677 val cst = (L'.CApp (cst, c'), loc)
adamc@1270 2678 val cst = (L'.CApp (cst, visible), loc)
adam@1886 2679
adam@1886 2680 val (env', n) = E.pushENamed env' x ct
adamc@1270 2681 in
adamc@1270 2682 checkKind env c' ck (L'.KRecord (L'.KType, loc), loc);
adamc@1270 2683 checkCon env' pe' pet pst;
adamc@1270 2684 checkCon env' ce' cet cst;
adamc@1270 2685
adam@1886 2686 ([(L'.SgiConAbs (x', hidden_n, cstK), loc),
adam@1912 2687 (L'.SgiConstraint ((L'.CConcat (pkey, visible), loc), hidden), loc),
adam@1886 2688 (L'.SgiVal (x, n, ct), loc)], (env', denv, gs''' @ gs'' @ gs' @ gs))
adamc@1270 2689 end
adamc@1270 2690
adamc@1270 2691 | L.SgiStr (x, sgn) =>
adamc@1270 2692 let
adamc@1270 2693 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2694 val (env', n) = E.pushStrNamed env x sgn'
adam@1864 2695 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adamc@1270 2696 in
adam@1864 2697 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv', gs' @ gs))
adamc@1270 2698 end
adamc@1270 2699
adamc@1270 2700 | L.SgiSgn (x, sgn) =>
adamc@1270 2701 let
adamc@1270 2702 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2703 val (env', n) = E.pushSgnNamed env x sgn'
adamc@1270 2704 in
adamc@1270 2705 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@1270 2706 end
adamc@1270 2707
adamc@1270 2708 | L.SgiInclude sgn =>
adamc@1270 2709 let
adamc@1270 2710 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@1270 2711 in
adamc@1270 2712 case #1 (hnormSgn env sgn') of
adamc@1270 2713 L'.SgnConst sgis =>
adamc@1270 2714 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@1270 2715 | _ => (sgnError env (NotIncludable sgn');
adamc@1270 2716 ([], (env, denv, [])))
adamc@1270 2717 end
adamc@1270 2718
adamc@1270 2719 | L.SgiConstraint (c1, c2) =>
adamc@1270 2720 let
adamc@1270 2721 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@1270 2722 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@1270 2723
adamc@1270 2724 val denv = D.assert env denv (c1', c2')
adamc@1270 2725 in
adam@1639 2726 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639 2727 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@1270 2728
adamc@1270 2729 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2))
adamc@1270 2730 end
adamc@1270 2731
adamc@1270 2732 | L.SgiClassAbs (x, k) =>
adamc@1270 2733 let
adamc@1270 2734 val k = elabKind env k
adamc@1270 2735 val (env, n) = E.pushCNamed env x k NONE
adamc@1270 2736 val env = E.pushClass env n
adamc@1270 2737 in
adamc@1270 2738 ([(L'.SgiClassAbs (x, n, k), loc)], (env, denv, []))
adamc@1270 2739 end
adamc@1270 2740
adamc@1270 2741 | L.SgiClass (x, k, c) =>
adamc@1270 2742 let
adamc@1270 2743 val k = elabKind env k
adamc@1270 2744 val (c', ck, gs) = elabCon (env, denv) c
adamc@1270 2745 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@1270 2746 val env = E.pushClass env n
adamc@1270 2747 in
adamc@1270 2748 checkKind env c' ck k;
adamc@1270 2749 ([(L'.SgiClass (x, n, k, c'), loc)], (env, denv, []))
adamc@1270 2750 end)
adamc@211 2751
adamc@83 2752 and elabSgn (env, denv) (sgn, loc) =
adamc@31 2753 case sgn of
adamc@31 2754 L.SgnConst sgis =>
adamc@31 2755 let
adamc@88 2756 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 2757
adamc@62 2758 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 2759 case sgi of
adamc@62 2760 L'.SgiConAbs (x, _, _) =>
adamc@62 2761 (if SS.member (cons, x) then
adamc@62 2762 sgnError env (DuplicateCon (loc, x))
adamc@62 2763 else
adamc@62 2764 ();
adamc@62 2765 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2766 | L'.SgiCon (x, _, _, _) =>
adamc@62 2767 (if SS.member (cons, x) then
adamc@62 2768 sgnError env (DuplicateCon (loc, x))
adamc@62 2769 else
adamc@62 2770 ();
adamc@62 2771 (SS.add (cons, x), vals, sgns, strs))
adamc@805 2772 | L'.SgiDatatype dts =>
adamc@156 2773 let
adamc@805 2774 val (cons, vals) =
adamc@805 2775 let
adamc@805 2776 fun doOne ((x, _, _, xncs), (cons, vals)) =
adamc@805 2777 let
adamc@805 2778 val vals = foldl (fn ((x, _, _), vals) =>
adamc@805 2779 (if SS.member (vals, x) then
adamc@805 2780 sgnError env (DuplicateVal (loc, x))
adamc@805 2781 else
adamc@805 2782 ();
adamc@805 2783 SS.add (vals, x)))
adamc@805 2784 vals xncs
adamc@805 2785 in
adamc@805 2786 if SS.member (cons, x) then
adamc@805 2787 sgnError env (DuplicateCon (loc, x))
adamc@805 2788 else
adamc@805 2789 ();
adamc@805 2790 (SS.add (cons, x), vals)
adamc@805 2791 end
adamc@805 2792 in
adamc@805 2793 foldl doOne (cons, vals) dts
adamc@805 2794 end
adamc@156 2795 in
adamc@805 2796 (cons, vals, sgns, strs)
adamc@156 2797 end
adamc@191 2798 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2799 (if SS.member (cons, x) then
adamc@156 2800 sgnError env (DuplicateCon (loc, x))
adamc@156 2801 else
adamc@156 2802 ();
adamc@156 2803 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2804 | L'.SgiVal (x, _, _) =>
adamc@62 2805 (if SS.member (vals, x) then
adamc@62 2806 sgnError env (DuplicateVal (loc, x))
adamc@62 2807 else
adamc@62 2808 ();
adamc@62 2809 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2810 | L'.SgiSgn (x, _, _) =>
adamc@62 2811 (if SS.member (sgns, x) then
adamc@62 2812 sgnError env (DuplicateSgn (loc, x))
adamc@62 2813 else
adamc@62 2814 ();
adamc@62 2815 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2816 | L'.SgiStr (x, _, _) =>
adamc@62 2817 (if SS.member (strs, x) then
adamc@62 2818 sgnError env (DuplicateStr (loc, x))
adamc@62 2819 else
adamc@62 2820 ();
adamc@88 2821 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2822 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@563 2823 | L'.SgiClassAbs (x, _, _) =>
adamc@211 2824 (if SS.member (cons, x) then
adamc@211 2825 sgnError env (DuplicateCon (loc, x))
adamc@211 2826 else
adamc@211 2827 ();
adamc@211 2828 (SS.add (cons, x), vals, sgns, strs))
adamc@563 2829 | L'.SgiClass (x, _, _, _) =>
adamc@211 2830 (if SS.member (cons, x) then
adamc@211 2831 sgnError env (DuplicateCon (loc, x))
adamc@211 2832 else
adamc@211 2833 ();
adamc@460 2834 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2835 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2836 in
adamc@83 2837 ((L'.SgnConst sgis', loc), gs)
adamc@31 2838 end
adamc@31 2839 | L.SgnVar x =>
adamc@31 2840 (case E.lookupSgn env x of
adamc@31 2841 NONE =>
adamc@31 2842 (sgnError env (UnboundSgn (loc, x));
adamc@83 2843 ((L'.SgnError, loc), []))
adamc@83 2844 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2845 | L.SgnFun (m, dom, ran) =>
adamc@41 2846 let
adamc@83 2847 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2848 val (env', n) = E.pushStrNamed env m dom'
adamc@469 2849 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@469 2850 val (ran', gs2) = elabSgn (env', denv') ran
adamc@41 2851 in
adamc@83 2852 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2853 end
adam@1864 2854 | L.SgnWhere (sgn, ms, x, c) =>
adamc@42 2855 let
adamc@83 2856 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2857 val (c', ck, ds2) = elabCon (env, denv) c
adam@1864 2858
adam@1864 2859 fun checkPath (ms, sgn') =
adam@1864 2860 case #1 (hnormSgn env sgn') of
adam@1864 2861 L'.SgnConst sgis =>
adam@1864 2862 List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adam@1864 2863 List.null ms andalso x' = x andalso
adam@1864 2864 (unifyKinds env k ck
adam@1864 2865 handle KUnify x => sgnError env (WhereWrongKind x);
adam@1864 2866 true)
adam@1864 2867 | (L'.SgiStr (x', _, sgn''), _) =>
adam@1864 2868 (case ms of
adam@1864 2869 [] => false
adam@1864 2870 | m :: ms' =>
adam@1864 2871 m = x' andalso
adam@1864 2872 checkPath (ms', sgn''))
adam@1864 2873 | _ => false) sgis
adam@1864 2874 | _ => false
adam@1864 2875 in
adam@1864 2876 if checkPath (ms, sgn') then
adam@1864 2877 ((L'.SgnWhere (sgn', ms, x, c'), loc), ds1 @ ds2)
adam@1864 2878 else
adam@1864 2879 (sgnError env (UnWhereable (sgn', x));
adam@1864 2880 (sgnerror, []))
adamc@42 2881 end
adamc@59 2882 | L.SgnProj (m, ms, x) =>
adamc@59 2883 (case E.lookupStr env m of
adamc@59 2884 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2885 (sgnerror, []))
adamc@59 2886 | SOME (n, sgn) =>
adamc@59 2887 let
adamc@59 2888 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2889 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2890 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2891 (strerror, sgnerror))
adamc@59 2892 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2893 ((L'.StrVar n, loc), sgn) ms
adamc@59 2894 in
adamc@59 2895 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2896 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2897 (sgnerror, []))
adamc@83 2898 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2899 end)
adamc@59 2900
adamc@31 2901
adamc@706 2902 and selfify env {str, strs, sgn} =
adamc@66 2903 case #1 (hnormSgn env sgn) of
adamc@66 2904 L'.SgnError => sgn
adamc@66 2905 | L'.SgnVar _ => sgn
adamc@66 2906
adamc@66 2907 | L'.SgnConst sgis =>
adam@1387 2908 (L'.SgnConst (#1 (ListUtil.foldlMapConcat
adam@1387 2909 (fn (sgi, env) =>
adam@1387 2910 (case sgi of (L'.SgiConAbs (x, n, k), loc) =>
adam@1387 2911 [(L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2912 | (L'.SgiDatatype dts, loc) =>
adam@1387 2913 map (fn (x, n, xs, xncs) => (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)) dts
adam@1387 2914 | (L'.SgiClassAbs (x, n, k), loc) =>
adam@1387 2915 [(L'.SgiClass (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1387 2916 | (L'.SgiStr (x, n, sgn), loc) =>
adam@1387 2917 [(L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)]
adam@1387 2918 | x => [x],
adam@1387 2919 E.sgiBinds env sgi)) env sgis)), #2 sgn)
adamc@66 2920 | L'.SgnFun _ => sgn
adamc@66 2921 | L'.SgnWhere _ => sgn
adamc@66 2922 | L'.SgnProj (m, ms, x) =>
adamc@66 2923 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2924 (L'.StrVar m, #2 sgn) ms,
adamc@66 2925 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2926 field = x} of
adamc@66 2927 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2928 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2929
adamc@706 2930 and selfifyAt env {str, sgn} =
adamc@66 2931 let
adamc@66 2932 fun self (str, _) =
adamc@66 2933 case str of
adamc@66 2934 L'.StrVar x => SOME (x, [])
adamc@66 2935 | L'.StrProj (str, x) =>
adamc@66 2936 (case self str of
adamc@66 2937 NONE => NONE
adamc@66 2938 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2939 | _ => NONE
adamc@66 2940 in
adamc@66 2941 case self str of
adamc@66 2942 NONE => sgn
adamc@66 2943 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2944 end
adamc@66 2945
adamc@706 2946 and dopen env {str, strs, sgn} =
adamc@66 2947 let
adam@1527 2948 fun isVisible x = x <> "" andalso String.sub (x, 0) <> #"?"
adam@1527 2949
adamc@66 2950 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2951 (L'.StrVar str, #2 sgn) strs
adamc@66 2952 in
adamc@66 2953 case #1 (hnormSgn env sgn) of
adamc@66 2954 L'.SgnConst sgis =>
adamc@805 2955 ListUtil.foldlMapConcat
adamc@805 2956 (fn ((sgi, loc), env') =>
adamc@805 2957 let
adamc@805 2958 val d =
adamc@805 2959 case sgi of
adamc@805 2960 L'.SgiConAbs (x, n, k) =>
adam@1527 2961 if isVisible x then
adam@1527 2962 let
adam@1527 2963 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 2964 in
adam@1527 2965 [(L'.DCon (x, n, k, c), loc)]
adam@1527 2966 end
adam@1527 2967 else
adam@1527 2968 []
adamc@805 2969 | L'.SgiCon (x, n, k, c) =>
adam@1527 2970 if isVisible x then
adam@1527 2971 [(L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)]
adam@1527 2972 else
adam@1527 2973 []
adamc@805 2974 | L'.SgiDatatype dts =>
adam@1527 2975 List.mapPartial (fn (x, n, xs, xncs) => if isVisible x then
adam@1527 2976 SOME (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adam@1527 2977 else
adam@1527 2978 NONE) dts
adamc@805 2979 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adam@1527 2980 if isVisible x then
adam@1527 2981 [(L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)]
adam@1527 2982 else
adam@1527 2983 []
adamc@805 2984 | L'.SgiVal (x, n, t) =>
adam@1527 2985 if isVisible x then
adam@1527 2986 [(L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)]
adam@1527 2987 else
adam@1527 2988 []
adamc@805 2989 | L'.SgiStr (x, n, sgn) =>
adam@1527 2990 if isVisible x then
adam@1527 2991 [(L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)]
adam@1527 2992 else
adam@1527 2993 []
adamc@805 2994 | L'.SgiSgn (x, n, sgn) =>
adam@1527 2995 if isVisible x then
adam@1527 2996 [(L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)]
adam@1527 2997 else
adam@1527 2998 []
adamc@805 2999 | L'.SgiConstraint (c1, c2) =>
adamc@805 3000 [(L'.DConstraint (c1, c2), loc)]
adamc@805 3001 | L'.SgiClassAbs (x, n, k) =>
adam@1527 3002 if isVisible x then
adam@1527 3003 let
adam@1527 3004 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 3005 in
adam@1527 3006 [(L'.DCon (x, n, k, c), loc)]
adam@1527 3007 end
adam@1527 3008 else
adam@1527 3009 []
adamc@805 3010 | L'.SgiClass (x, n, k, _) =>
adam@1527 3011 if isVisible x then
adam@1527 3012 let
adam@1527 3013 val c = (L'.CModProj (str, strs, x), loc)
adam@1527 3014 in
adam@1527 3015 [(L'.DCon (x, n, k, c), loc)]
adam@1527 3016 end
adam@1527 3017 else
adam@1527 3018 []
adamc@805 3019 in
adamc@805 3020 (d, foldl (fn (d, env') => E.declBinds env' d) env' d)
adamc@805 3021 end)
adamc@805 3022 env sgis
adamc@66 3023 | _ => (strError env (UnOpenable sgn);
adamc@628 3024 ([], env))
adamc@66 3025 end
adamc@66 3026
adamc@706 3027 and sgiOfDecl (d, loc) =
adamc@31 3028 case d of
adamc@123 3029 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 3030 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 3031 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 3032 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 3033 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 3034 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 3035 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 3036 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 3037 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 3038 | L'.DExport _ => []
adamc@707 3039 | L'.DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@707 3040 [(L'.SgiVal (x, n, (L'.CApp ((L'.CApp (tableOf (), c), loc),
adamc@707 3041 (L'.CConcat (pc, cc), loc)), loc)), loc)]
adamc@460 3042 | L'.DSequence (tn, x, n) => [(L'.SgiVal (x, n, sequenceOf ()), loc)]
adamc@754 3043 | L'.DView (tn, x, n, _, c) =>
adamc@754 3044 [(L'.SgiVal (x, n, (L'.CApp (viewOf (), c), loc)), loc)]
adamc@271 3045 | L'.DDatabase _ => []
adamc@460 3046 | L'.DCookie (tn, x, n, c) => [(L'.SgiVal (x, n, (L'.CApp (cookieOf (), c), loc)), loc)]
adamc@720 3047 | L'.DStyle (tn, x, n) => [(L'.SgiVal (x, n, styleOf ()), loc)]
adamc@1075 3048 | L'.DTask _ => []
adamc@1199 3049 | L'.DPolicy _ => []
adam@1294 3050 | L'.DOnError _ => []
adam@2010 3051 | L'.DFfi (x, n, _, t) => [(L'.SgiVal (x, n, t), loc)]
adamc@88 3052
adamc@1000 3053 and subSgn' counterparts env strLoc sgn1 (sgn2 as (_, loc2)) =
adamc@469 3054 ((*prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@469 3055 ("sgn2", p_sgn env sgn2)];*)
adamc@35 3056 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 3057 (L'.SgnError, _) => ()
adamc@31 3058 | (_, L'.SgnError) => ()
adamc@31 3059
adamc@31 3060 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 3061 let
adam@2092 3062 (*val () = prefaces "subSgn" [("sgn1", p_sgn env sgn1),
adamc@362 3063 ("sgn2", p_sgn env sgn2),
adamc@362 3064 ("sgis1", p_sgn env (L'.SgnConst sgis1, loc2)),
adamc@362 3065 ("sgis2", p_sgn env (L'.SgnConst sgis2, loc2))]*)
adamc@362 3066
adamc@838 3067 fun cpart n = IM.find (!counterparts, n)
adamc@838 3068 fun cparts (n2, n1) = counterparts := IM.insert (!counterparts, n2, n1)
adamc@838 3069
adamc@838 3070 val sub2 = U.Con.map {kind = fn k => k,
adamc@838 3071 con = fn c =>
adamc@838 3072 case c of
adamc@838 3073 L'.CNamed n2 =>
adamc@838 3074 (case cpart n2 of
adamc@838 3075 NONE => c
adamc@838 3076 | SOME n1 => L'.CNamed n1)
adamc@838 3077 | _ => c}
adamc@838 3078
adamc@628 3079 fun folder (sgi2All as (sgi, loc), env) =
adamc@31 3080 let
adam@1668 3081 (*val () = prefaces "folder" [("sgi2", p_sgn_item env sgi2All)]*)
adamc@362 3082
adamc@805 3083 fun seek' f p =
adamc@31 3084 let
adamc@628 3085 fun seek env ls =
adamc@31 3086 case ls of
adamc@805 3087 [] => f env
adamc@31 3088 | h :: t =>
adamc@469 3089 case p (env, h) of
adamc@469 3090 NONE =>
adamc@469 3091 let
adamc@469 3092 val env = case #1 h of
adamc@469 3093 L'.SgiCon (x, n, k, c) =>
adamc@471 3094 if E.checkENamed env n then
adamc@471 3095 env
adamc@471 3096 else
adamc@471 3097 E.pushCNamedAs env x n k (SOME c)
adamc@469 3098 | L'.SgiConAbs (x, n, k) =>
adamc@471 3099 if E.checkENamed env n then
adamc@471 3100 env
adamc@471 3101 else
adamc@471 3102 E.pushCNamedAs env x n k NONE
adamc@469 3103 | _ => env
adamc@469 3104 in
adamc@628 3105 seek (E.sgiBinds env h) t
adamc@469 3106 end
adamc@88 3107 | SOME envs => envs
adamc@31 3108 in
adamc@628 3109 seek env sgis1
adamc@31 3110 end
adamc@805 3111
adamc@1000 3112 val seek = seek' (fn env => (sgnError env (UnmatchedSgi (strLoc, sgi2All));
adamc@805 3113 env))
adamc@31 3114 in
adamc@31 3115 case sgi of
adamc@31 3116 L'.SgiConAbs (x, n2, k2) =>
adam@1591 3117 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@31 3118 let
adamc@41 3119 fun found (x', n1, k1, co1) =
adamc@41 3120 if x = x' then
adamc@41 3121 let
adamc@623 3122 val () = unifyKinds env k1 k2
adam@1719 3123 handle KUnify (k1, k2, env', err) =>
adam@1591 3124 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3125 sgi2All, k2, env', err))
adamc@41 3126 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 3127 in
adamc@41 3128 SOME (if n1 = n2 then
adamc@41 3129 env
adamc@41 3130 else
adamc@838 3131 (cparts (n2, n1);
adamc@838 3132 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2))))
adamc@41 3133 end
adamc@41 3134 else
adamc@41 3135 NONE
adamc@31 3136 in
adamc@31 3137 case sgi1 of
adamc@41 3138 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 3139 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@805 3140 | L'.SgiDatatype dts =>
adamc@191 3141 let
adamc@191 3142 val k = (L'.KType, loc)
adamc@805 3143
adamc@805 3144 fun search dts =
adamc@805 3145 case dts of
adamc@805 3146 [] => NONE
adamc@805 3147 | (x', n1, xs, _) :: dts =>
adamc@805 3148 let
adamc@805 3149 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3150 in
adamc@805 3151 case found (x', n1, k', NONE) of
adamc@805 3152 NONE => search dts
adamc@805 3153 | x => x
adamc@805 3154 end
adamc@191 3155 in
adamc@805 3156 search dts
adamc@191 3157 end
adamc@191 3158 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 3159 let
adamc@191 3160 val k = (L'.KType, loc)
adamc@191 3161 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 3162 in
adamc@191 3163 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 3164 end
adamc@711 3165 | L'.SgiClassAbs (x', n1, k) => found (x', n1, k, NONE)
adamc@711 3166 | L'.SgiClass (x', n1, k, c) => found (x', n1, k, SOME c)
adamc@31 3167 | _ => NONE
adamc@31 3168 end)
adamc@31 3169
adamc@31 3170 | L'.SgiCon (x, n2, k2, c2) =>
adam@1591 3171 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3172 let
adamc@211 3173 fun found (x', n1, k1, c1) =
adamc@211 3174 if x = x' then
adamc@211 3175 let
adamc@838 3176 val c2 = sub2 c2
adamc@838 3177
adamc@327 3178 fun good () =
adamc@327 3179 let
adamc@327 3180 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@327 3181 val env = if n1 = n2 then
adamc@327 3182 env
adamc@327 3183 else
adamc@839 3184 (cparts (n2, n1);
adamc@839 3185 E.pushCNamedAs env x n1 k1 (SOME c1))
adamc@327 3186 in
adamc@628 3187 SOME env
adamc@327 3188 end
adamc@211 3189 in
adamc@987 3190 (unifyCons env loc c1 c2;
adamc@628 3191 good ())
adam@1719 3192 handle CUnify (c1, c2, env', err) =>
adam@1591 3193 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719 3194 sgi2All, c2, env', err));
adamc@211 3195 good ())
adamc@211 3196 end
adamc@211 3197 else
adamc@211 3198 NONE
adamc@211 3199 in
adamc@211 3200 case sgi1 of
adamc@211 3201 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@711 3202 | L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3203 | _ => NONE
adamc@211 3204 end)
adamc@31 3205
adamc@805 3206 | L'.SgiDatatype dts2 =>
adamc@805 3207 let
adam@1591 3208 fun found' (sgi1All as (_, loc), (x1, n1, xs1, xncs1), (x2, n2, xs2, xncs2), env) =
adamc@805 3209 if x1 <> x2 then
adamc@805 3210 NONE
adamc@805 3211 else
adamc@805 3212 let
adamc@805 3213 fun mismatched ue =
adam@1591 3214 (sgnError env (SgiMismatchedDatatypes (loc, sgi1All, sgi2All, ue));
adamc@805 3215 SOME env)
adamc@805 3216
adamc@805 3217 val k = (L'.KType, loc)
adamc@805 3218 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@805 3219
adamc@805 3220 fun good () =
adamc@805 3221 let
adamc@805 3222 val env = E.sgiBinds env sgi1All
adamc@805 3223 val env = if n1 = n2 then
adamc@805 3224 env
adamc@805 3225 else
adamc@838 3226 (cparts (n2, n1);
adamc@838 3227 E.pushCNamedAs env x1 n2 k'
adamc@838 3228 (SOME (L'.CNamed n1, loc)))
adamc@805 3229 in
adamc@805 3230 SOME env
adamc@805 3231 end
adamc@805 3232
adamc@805 3233 val env = E.pushCNamedAs env x1 n1 k' NONE
adamc@805 3234 val env = if n1 = n2 then
adamc@805 3235 env
adamc@805 3236 else
adamc@838 3237 (cparts (n2, n1);
adamc@838 3238 E.pushCNamedAs env x1 n2 k' (SOME (L'.CNamed n1, loc)))
adamc@805 3239 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@805 3240 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@805 3241 String.compare (x1, x2) <> EQUAL
adamc@805 3242 orelse case (t1, t2) of
adamc@805 3243 (NONE, NONE) => false
adamc@805 3244 | (SOME t1, SOME t2) =>
adamc@987 3245 (unifyCons env loc t1 (sub2 t2); false)
adamc@805 3246 | _ => true
adamc@805 3247 in
adamc@805 3248 (if xs1 <> xs2
adamc@805 3249 orelse length xncs1 <> length xncs2
adamc@805 3250 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@805 3251 mismatched NONE
adamc@160 3252 else
adamc@805 3253 good ())
adamc@805 3254 handle CUnify ue => mismatched (SOME ue)
adamc@805 3255 end
adamc@805 3256 in
adamc@805 3257 seek'
adamc@805 3258 (fn _ =>
adamc@805 3259 let
adamc@805 3260 fun seekOne (dt2, env) =
adamc@805 3261 seek (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3262 case sgi1 of
adamc@805 3263 L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@805 3264 found' (sgi1All, (x', n1, xs, xncs1), dt2, env)
adamc@805 3265 | _ => NONE)
adamc@805 3266
adamc@805 3267 fun seekAll (dts, env) =
adamc@805 3268 case dts of
adamc@805 3269 [] => env
adamc@805 3270 | dt :: dts => seekAll (dts, seekOne (dt, env))
adamc@805 3271 in
adamc@805 3272 seekAll (dts2, env)
adamc@805 3273 end)
adamc@805 3274 (fn (env, sgi1All as (sgi1, _)) =>
adamc@805 3275 let
adamc@805 3276 fun found dts1 =
adamc@805 3277 let
adamc@805 3278 fun iter (dts1, dts2, env) =
adamc@805 3279 case (dts1, dts2) of
adamc@805 3280 ([], []) => SOME env
adamc@805 3281 | (dt1 :: dts1, dt2 :: dts2) =>
adamc@805 3282 (case found' (sgi1All, dt1, dt2, env) of
adamc@805 3283 NONE => NONE
adamc@805 3284 | SOME env => iter (dts1, dts2, env))
adamc@805 3285 | _ => NONE
adamc@805 3286 in
adamc@805 3287 iter (dts1, dts2, env)
adamc@805 3288 end
adamc@805 3289 in
adamc@805 3290 case sgi1 of
adamc@805 3291 L'.SgiDatatype dts1 => found dts1
adamc@805 3292 | _ => NONE
adamc@805 3293 end)
adamc@805 3294 end
adamc@156 3295
adamc@191 3296 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adam@1591 3297 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@158 3298 case sgi1 of
adamc@191 3299 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 3300 if x = x' then
adamc@158 3301 let
adamc@158 3302 val k = (L'.KType, loc)
adamc@191 3303 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 3304 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 3305 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 3306
adamc@158 3307 fun good () =
adamc@158 3308 let
adamc@191 3309 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 3310 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 3311 in
adamc@838 3312 cparts (n2, n1);
adamc@628 3313 SOME env
adamc@158 3314 end
adamc@158 3315 in
adamc@987 3316 (unifyCons env loc t1 t2;
adamc@628 3317 good ())
adam@1719 3318 handle CUnify (c1, c2, env', err) =>
adam@1719 3319 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@158 3320 good ())
adamc@158 3321 end
adamc@158 3322 else
adamc@158 3323 NONE
adamc@158 3324
adamc@158 3325 | _ => NONE)
adamc@156 3326
adamc@32 3327 | L'.SgiVal (x, n2, c2) =>
adam@1591 3328 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@32 3329 case sgi1 of
adamc@41 3330 L'.SgiVal (x', n1, c1) =>
adamc@41 3331 if x = x' then
adamc@838 3332 ((*prefaces "val" [("x", PD.string x),
adamc@838 3333 ("n1", PD.string (Int.toString n1)),
adamc@838 3334 ("c1", p_con env c1),
adamc@838 3335 ("c2", p_con env c2),
adamc@838 3336 ("c2'", p_con env (sub2 c2))];*)
adamc@987 3337 unifyCons env loc c1 (sub2 c2);
adamc@628 3338 SOME env)
adam@1719 3339 handle CUnify (c1, c2, env', err) =>
adam@1719 3340 (sgnError env (SgiWrongCon (loc, sgi1All, c1, sgi2All, c2, env', err));
adamc@628 3341 SOME env)
adamc@41 3342 else
adamc@41 3343 NONE
adamc@32 3344 | _ => NONE)
adamc@32 3345
adamc@33 3346 | L'.SgiStr (x, n2, sgn2) =>
adam@1591 3347 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@33 3348 case sgi1 of
adamc@41 3349 L'.SgiStr (x', n1, sgn1) =>
adamc@41 3350 if x = x' then
adamc@66 3351 let
adam@2099 3352 (* Don't forget to save & restore the
adam@2099 3353 * counterparts map around recursive calls!
adam@2099 3354 * Otherwise, all sorts of mayhem may result. *)
adam@2099 3355 val saved = !counterparts
adam@1591 3356 val () = subSgn' counterparts env loc sgn1 sgn2
adam@2099 3357 val () = counterparts := saved
adamc@66 3358 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 3359 val env = if n1 = n2 then
adamc@66 3360 env
adamc@66 3361 else
adamc@66 3362 E.pushStrNamedAs env x n2
adamc@66 3363 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 3364 sgn = sgn2})
adamc@66 3365 in
adamc@628 3366 SOME env
adamc@66 3367 end
adamc@41 3368 else
adamc@41 3369 NONE
adamc@33 3370 | _ => NONE)
adamc@59 3371
adamc@59 3372 | L'.SgiSgn (x, n2, sgn2) =>
adam@1591 3373 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@59 3374 case sgi1 of
adamc@59 3375 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 3376 if x = x' then
adamc@65 3377 let
adam@1591 3378 val () = subSgn' counterparts env loc sgn1 sgn2
adam@1591 3379 val () = subSgn' counterparts env loc sgn2 sgn1
adamc@65 3380
adamc@65 3381 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 3382 val env = if n1 = n2 then
adamc@65 3383 env
adamc@65 3384 else
adamc@838 3385 (cparts (n2, n1);
adamc@838 3386 E.pushSgnNamedAs env x n1 sgn2)
adamc@65 3387 in
adamc@628 3388 SOME env
adamc@65 3389 end
adamc@59 3390 else
adamc@59 3391 NONE
adamc@59 3392 | _ => NONE)
adamc@88 3393
adamc@88 3394 | L'.SgiConstraint (c2, d2) =>
adam@1591 3395 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@88 3396 case sgi1 of
adamc@88 3397 L'.SgiConstraint (c1, d1) =>
adam@2092 3398 (* It's important to do only simple equality checking here,
adam@2092 3399 * with no unification, because constraints are unnamed.
adam@2092 3400 * It's too easy to pick the wrong pair to unify! *)
adam@2092 3401 if consEqSimple env (c1, c2)
adam@2092 3402 andalso consEqSimple env (d1, d2) then
adamc@628 3403 SOME env
adamc@88 3404 else
adamc@88 3405 NONE
adamc@88 3406 | _ => NONE)
adamc@203 3407
adamc@563 3408 | L'.SgiClassAbs (x, n2, k2) =>
adam@1591 3409 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3410 let
adamc@563 3411 fun found (x', n1, k1, co) =
adamc@211 3412 if x = x' then
adamc@211 3413 let
adamc@623 3414 val () = unifyKinds env k1 k2
adam@1719 3415 handle KUnify (k1, k2, env', err) =>
adam@1591 3416 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3417 sgi2All, k2, env', err))
adamc@563 3418
adamc@711 3419 val env = E.pushCNamedAs env x n1 k1 co
adamc@211 3420 in
adamc@211 3421 SOME (if n1 = n2 then
adamc@211 3422 env
adamc@211 3423 else
adamc@838 3424 (cparts (n2, n1);
adamc@838 3425 E.pushCNamedAs env x n2 k1 (SOME (L'.CNamed n1, loc2))))
adamc@211 3426 end
adamc@211 3427 else
adamc@211 3428 NONE
adamc@211 3429 in
adamc@211 3430 case sgi1 of
adamc@563 3431 L'.SgiClassAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@563 3432 | L'.SgiClass (x', n1, k1, c) => found (x', n1, k1, SOME c)
adam@1797 3433 | L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adam@1797 3434 | L'.SgiCon (x', n1, k1, c) => found (x', n1, k1, SOME c)
adamc@211 3435 | _ => NONE
adamc@211 3436 end)
adamc@563 3437 | L'.SgiClass (x, n2, k2, c2) =>
adam@1591 3438 seek (fn (env, sgi1All as (sgi1, loc)) =>
adamc@211 3439 let
adamc@563 3440 fun found (x', n1, k1, c1) =
adamc@211 3441 if x = x' then
adamc@211 3442 let
adamc@623 3443 val () = unifyKinds env k1 k2
adam@1719 3444 handle KUnify (k1, k2, env', err) =>
adam@1591 3445 sgnError env (SgiWrongKind (loc, sgi1All, k1,
adam@1719 3446 sgi2All, k2, env', err))
adamc@563 3447
adamc@838 3448 val c2 = sub2 c2
adamc@838 3449
adamc@218 3450 fun good () =
adamc@218 3451 let
adamc@711 3452 val env = E.pushCNamedAs env x n2 k2 (SOME c2)
adamc@218 3453 val env = if n1 = n2 then
adamc@218 3454 env
adamc@218 3455 else
adamc@839 3456 (cparts (n2, n1);
adamc@839 3457 E.pushCNamedAs env x n1 k2 (SOME c1))
adamc@218 3458 in
adamc@628 3459 SOME env
adamc@218 3460 end
adamc@211 3461 in
adamc@987 3462 (unifyCons env loc c1 c2;
adamc@628 3463 good ())
adam@1719 3464 handle CUnify (c1, c2, env', err) =>
adam@1591 3465 (sgnError env (SgiWrongCon (loc, sgi1All, c1,
adam@1719 3466 sgi2All, c2, env', err));
adamc@211 3467 good ())
adamc@211 3468 end
adamc@211 3469 else
adamc@211 3470 NONE
adamc@211 3471 in
adamc@211 3472 case sgi1 of
adamc@563 3473 L'.SgiClass (x', n1, k1, c1) => found (x', n1, k1, c1)
adam@1797 3474 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 3475 | _ => NONE
adamc@211 3476 end)
adamc@31 3477 end
adamc@31 3478 in
adamc@628 3479 ignore (foldl folder env sgis2)
adamc@31 3480 end
adamc@31 3481
adamc@41 3482 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 3483 let
adamc@480 3484 val ran2 =
adamc@43 3485 if n1 = n2 then
adamc@480 3486 ran2
adamc@43 3487 else
adamc@480 3488 subStrInSgn (n2, n1) ran2
adamc@43 3489 in
adamc@1000 3490 subSgn' counterparts env strLoc dom2 dom1;
adamc@1000 3491 subSgn' counterparts (E.pushStrNamedAs env m1 n1 dom2) strLoc ran1 ran2
adamc@43 3492 end
adamc@41 3493
adamc@1000 3494 | _ => sgnError env (SgnWrongForm (strLoc, sgn1, sgn2)))
adamc@41 3495
adam@1580 3496 and subSgn env x y z = subSgn' (ref IM.empty) env x y z
adam@1580 3497 handle e as E.UnboundNamed _ => if ErrorMsg.anyErrors () then () else raise e
adamc@61 3498
adamc@706 3499 and positive self =
adamc@312 3500 let
adamc@312 3501 open L
adamc@312 3502
adamc@312 3503 fun none (c, _) =
adamc@312 3504 case c of
adamc@312 3505 CAnnot (c, _) => none c
adamc@312 3506
adamc@312 3507 | TFun (c1, c2) => none c1 andalso none c2
adamc@312 3508 | TCFun (_, _, _, c) => none c
adamc@312 3509 | TRecord c => none c
adamc@312 3510
adamc@312 3511 | CVar ([], x) => x <> self
adamc@312 3512 | CVar _ => true
adamc@312 3513 | CApp (c1, c2) => none c1 andalso none c2
adamc@312 3514 | CAbs _ => false
adamc@628 3515 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3516
adamc@623 3517 | CKAbs _ => false
adamc@623 3518 | TKFun _ => false
adamc@623 3519
adamc@312 3520 | CName _ => true
adamc@312 3521
adamc@312 3522 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso none c2) xcs
adamc@312 3523 | CConcat (c1, c2) => none c1 andalso none c2
adamc@621 3524 | CMap => true
adamc@312 3525
adamc@312 3526 | CUnit => true
adamc@312 3527
adamc@312 3528 | CTuple cs => List.all none cs
adamc@312 3529 | CProj (c, _) => none c
adamc@312 3530
adamc@312 3531 | CWild _ => false
adamc@312 3532
adamc@312 3533 fun pos (c, _) =
adamc@312 3534 case c of
adamc@312 3535 CAnnot (c, _) => pos c
adamc@312 3536
adamc@312 3537 | TFun (c1, c2) => none c1 andalso pos c2
adamc@312 3538 | TCFun (_, _, _, c) => pos c
adamc@312 3539 | TRecord c => pos c
adamc@312 3540
adamc@312 3541 | CVar _ => true
adamc@312 3542 | CApp (c1, c2) => pos c1 andalso none c2
adamc@312 3543 | CAbs _ => false
adamc@628 3544 | TDisjoint (c1, c2, c3) => none c1 andalso none c2 andalso none c3
adamc@312 3545
adamc@623 3546 | CKAbs _ => false
adamc@623 3547 | TKFun _ => false
adamc@623 3548
adamc@312 3549 | CName _ => true
adamc@312 3550
adamc@312 3551 | CRecord xcs => List.all (fn (c1, c2) => none c1 andalso pos c2) xcs
adamc@312 3552 | CConcat (c1, c2) => pos c1 andalso pos c2
adamc@621 3553 | CMap => true
adamc@312 3554
adamc@312 3555 | CUnit => true
adamc@312 3556
adamc@312 3557 | CTuple cs => List.all pos cs
adamc@312 3558 | CProj (c, _) => pos c
adamc@312 3559
adamc@312 3560 | CWild _ => false
adamc@312 3561 in
adamc@312 3562 pos
adamc@312 3563 end
adamc@312 3564
adamc@706 3565 and wildifyStr env (str, sgn) =
adamc@325 3566 case #1 (hnormSgn env sgn) of
adamc@325 3567 L'.SgnConst sgis =>
adamc@325 3568 (case #1 str of
adamc@325 3569 L.StrConst ds =>
adamc@325 3570 let
adamc@1270 3571 fun cname d =
adamc@1270 3572 case d of
adamc@1270 3573 L'.SgiCon (x, _, _, _) => SOME x
adamc@1270 3574 | L'.SgiConAbs (x, _, _) => SOME x
adamc@1270 3575 | L'.SgiClass (x, _, _, _) => SOME x
adamc@1270 3576 | L'.SgiClassAbs (x, _, _) => SOME x
adamc@1270 3577 | _ => NONE
adamc@1270 3578
adamc@1270 3579 fun dname (d, _) =
adamc@1270 3580 case d of
adamc@1270 3581 L.DCon (x, _, _) => SOME x
adamc@1270 3582 | _ => NONE
adamc@1270 3583
adamc@493 3584 fun decompileKind (k, loc) =
adamc@493 3585 case k of
adamc@493 3586 L'.KType => SOME (L.KType, loc)
adamc@493 3587 | L'.KArrow (k1, k2) =>
adamc@493 3588 (case (decompileKind k1, decompileKind k2) of
adamc@493 3589 (SOME k1, SOME k2) => SOME (L.KArrow (k1, k2), loc)
adamc@493 3590 | _ => NONE)
adamc@493 3591 | L'.KName => SOME (L.KName, loc)
adamc@493 3592 | L'.KRecord k =>
adamc@493 3593 (case decompileKind k of
adamc@493 3594 SOME k => SOME (L.KRecord k, loc)
adamc@493 3595 | _ => NONE)
adamc@493 3596 | L'.KUnit => SOME (L.KUnit, loc)
adamc@493 3597 | L'.KTuple ks =>
adamc@493 3598 let
adamc@493 3599 val ks' = List.mapPartial decompileKind ks
adamc@493 3600 in
adamc@493 3601 if length ks' = length ks then
adamc@493 3602 SOME (L.KTuple ks', loc)
adamc@493 3603 else
adamc@493 3604 NONE
adamc@493 3605 end
adamc@493 3606
adamc@493 3607 | L'.KError => NONE
adam@1639 3608 | L'.KUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adamc@493 3609 | L'.KUnif _ => NONE
adam@1639 3610 | L'.KTupleUnif (_, _, ref (L'.KKnown k)) => decompileKind k
adam@1302 3611 | L'.KTupleUnif _ => NONE
adamc@493 3612
adamc@623 3613 | L'.KRel _ => NONE
adamc@623 3614 | L'.KFun _ => NONE
adamc@623 3615
adam@1529 3616 fun maybeHnorm env c =
adam@1865 3617 hnormCon env c
adam@1865 3618 handle E.UnboundNamed _ => c
adam@1865 3619
adam@1865 3620 fun decompileCon env c =
adam@1865 3621 case decompileCon' env c of
adam@1865 3622 SOME v => SOME v
adam@1865 3623 | NONE => decompileCon' env (maybeHnorm env c)
adam@1865 3624
adam@1865 3625 and decompileCon' env (c as (_, loc)) =
adam@1865 3626 case #1 c of
adamc@325 3627 L'.CRel i =>
adamc@325 3628 let
adamc@325 3629 val (s, _) = E.lookupCRel env i
adamc@325 3630 in
adamc@325 3631 SOME (L.CVar ([], s), loc)
adamc@325 3632 end
adamc@325 3633 | L'.CNamed i =>
adamc@325 3634 let
adamc@325 3635 val (s, _, _) = E.lookupCNamed env i
adamc@325 3636 in
adamc@325 3637 SOME (L.CVar ([], s), loc)
adamc@325 3638 end
adamc@325 3639 | L'.CModProj (m1, ms, x) =>
adamc@325 3640 let
adamc@325 3641 val (s, _) = E.lookupStrNamed env m1
adamc@325 3642 in
adamc@325 3643 SOME (L.CVar (s :: ms, x), loc)
adamc@325 3644 end
adamc@325 3645 | L'.CName s => SOME (L.CName s, loc)
adam@1886 3646 | L'.CRecord (k, xcs) =>
adamc@325 3647 let
adamc@325 3648 fun fields xcs =
adamc@325 3649 case xcs of
adamc@325 3650 [] => SOME []
adamc@325 3651 | (x, t) :: xcs =>
adamc@325 3652 case (decompileCon env x, decompileCon env t, fields xcs) of
adamc@325 3653 (SOME x, SOME t, SOME xcs) => SOME ((x, t) :: xcs)
adamc@325 3654 | _ => NONE
adam@1886 3655
adam@1886 3656 val c' = Option.map (fn xcs => (L.CRecord xcs, loc))
adam@1886 3657 (fields xcs)
adamc@325 3658 in
adam@1886 3659 Option.map (fn c' =>
adam@1886 3660 case decompileKind k of
adam@1886 3661 NONE => c'
adam@1886 3662 | SOME k' => (L.CAnnot (c', (L.KRecord k', loc)), loc)) c'
adamc@325 3663 end
adamc@325 3664 | L'.CConcat (c1, c2) =>
adamc@325 3665 (case (decompileCon env c1, decompileCon env c2) of
adamc@325 3666 (SOME c1, SOME c2) => SOME (L.CConcat (c1, c2), loc)
adamc@325 3667 | _ => NONE)
adamc@325 3668 | L'.CUnit => SOME (L.CUnit, loc)
adam@1639 3669 | L'.CUnif (nl, _, _, _, ref (L'.Known c)) => decompileCon env (E.mliftConInCon nl c)
adamc@325 3670
adam@1585 3671 | L'.CApp (f, x) =>
adam@1585 3672 (case (decompileCon env f, decompileCon env x) of
adam@1585 3673 (SOME f, SOME x) => SOME (L.CApp (f, x), loc)
adam@1585 3674 | _ => NONE)
adam@1585 3675
adam@1864 3676 | L'.CTuple cs =>
adam@1864 3677 let
adam@1864 3678 val cs' = foldr (fn (c, cs') =>
adam@1864 3679 case cs' of
adam@1864 3680 NONE => NONE
adam@1864 3681 | SOME cs' =>
adam@1864 3682 case decompileCon env c of
adam@1864 3683 NONE => NONE
adam@1864 3684 | SOME c' => SOME (c' :: cs'))
adam@1864 3685 (SOME []) cs
adam@1864 3686 in
adam@1864 3687 case cs' of
adam@1864 3688 NONE => NONE
adam@1864 3689 | SOME cs' => SOME (L.CTuple cs', loc)
adam@1864 3690 end
adam@1864 3691
adam@1864 3692 | L'.CMap _ => SOME (L.CMap, loc)
adam@1865 3693 | L'.TRecord c =>
adam@1865 3694 (case decompileCon env c of
adam@1865 3695 NONE => NONE
adam@1865 3696 | SOME c' => SOME (L.TRecord c', loc))
adam@1864 3697
adam@1912 3698 | c => ((*Print.preface ("WTF?", p_con env (c, loc));*) NONE)
adamc@325 3699
adam@2109 3700 fun isClassOrFolder' env (c : L'.con) =
adam@2109 3701 case #1 c of
adam@2109 3702 L'.CAbs (x, k, c) =>
adam@2109 3703 let
adam@2109 3704 val env = E.pushCRel env x k
adam@2109 3705
adam@2109 3706 fun toHead (c : L'.con) =
adam@2109 3707 case #1 c of
adam@2109 3708 L'.CApp (c, _) => toHead c
adam@2109 3709 | _ => isClassOrFolder env c
adam@2109 3710 in
adam@2109 3711 toHead (hnormCon env c)
adam@2109 3712 end
adam@2109 3713 | _ => isClassOrFolder env c
adam@2109 3714
adamc@1264 3715 fun buildNeeded env sgis =
adamc@1275 3716 #1 (foldl (fn ((sgi, loc), (nd, env')) =>
adamc@1264 3717 (case sgi of
adam@1570 3718 L'.SgiCon (x, _, k, _) => naddCon (nd, x, k)
adam@1570 3719 | L'.SgiConAbs (x, _, k) => naddCon (nd, x, k)
adamc@1264 3720 | L'.SgiConstraint cs => naddConstraint (nd, (env', cs, loc))
adamc@1264 3721 | L'.SgiVal (x, _, t) =>
adamc@1264 3722 let
adamc@1277 3723 fun should t =
adamc@1277 3724 let
adamc@1277 3725 val t = normClassConstraint env' t
adam@2094 3726
adam@2094 3727 fun shouldR c =
adam@2094 3728 case hnormCon env' c of
adam@2094 3729 (L'.CApp (f, _), _) =>
adam@2094 3730 (case hnormCon env' f of
adam@2094 3731 (L'.CApp (f, cl), loc) =>
adam@2094 3732 (case hnormCon env' f of
adam@2109 3733 (L'.CMap _, _) => isClassOrFolder' env' cl
adam@2094 3734 | _ => false)
adam@2094 3735 | _ => false)
adam@2094 3736 | (L'.CConcat (c1, c2), _) =>
adam@2094 3737 shouldR c1 orelse shouldR c2
adam@2094 3738 | c => false
adamc@1277 3739 in
adamc@1277 3740 case #1 t of
adamc@1277 3741 L'.CApp (f, _) => isClassOrFolder env' f
adam@2094 3742 | L'.TRecord t => shouldR t
adamc@1277 3743 | _ => false
adamc@1277 3744 end
adamc@1270 3745 in
adamc@1277 3746 if should t then
adamc@1277 3747 naddVal (nd, x)
adamc@1277 3748 else
adamc@1277 3749 nd
adamc@1264 3750 end
adamc@1264 3751 | L'.SgiStr (x, _, s) =>
adamc@1270 3752 (case #1 (hnormSgn env' s) of
adamc@1270 3753 L'.SgnConst sgis' => naddMod (nd, x, (env', buildNeeded env' sgis'))
adamc@1264 3754 | _ => nd)
adamc@1264 3755 | _ => nd,
adamc@1275 3756 E.sgiBinds env' (sgi, loc)))
adamc@1275 3757 (nempty, env) sgis)
adamc@1264 3758
adamc@1264 3759 val nd = buildNeeded env sgis
adamc@1264 3760
adamc@1264 3761 fun removeUsed (nd, ds) =
adamc@1264 3762 foldl (fn ((d, _), nd) =>
adamc@634 3763 case d of
adamc@1264 3764 L.DCon (x, _, _) => ndelCon (nd, x)
adamc@1264 3765 | L.DVal (x, _, _) => ndelVal (nd, x)
adamc@1264 3766 | L.DOpen _ => nempty
adam@1868 3767 | L.DStr (x, _, _, (L.StrConst ds', _), _) =>
adamc@1264 3768 (case SM.find (nmods nd, x) of
adamc@1264 3769 NONE => nd
adamc@1270 3770 | SOME (env, nd') => naddMod (nd, x, (env, removeUsed (nd', ds'))))
adamc@1264 3771 | _ => nd)
adamc@1264 3772 nd ds
adamc@1264 3773
adamc@1264 3774 val nd = removeUsed (nd, ds)
adamc@1264 3775
adam@1662 3776 (* Among the declarations present explicitly in the program, find the last constructor or constraint declaration.
adam@1662 3777 * The new constructor/constraint declarations that we add may safely be put after that point. *)
adam@1662 3778 fun findLast (ds, acc) =
adam@1662 3779 case ds of
adam@1662 3780 [] => ([], acc)
adam@1662 3781 | (d : L.decl) :: ds' =>
adam@1662 3782 let
adam@1662 3783 val isCony = case #1 d of
adam@1662 3784 L.DCon _ => true
adam@1662 3785 | L.DDatatype _ => true
adam@1662 3786 | L.DDatatypeImp _ => true
adam@1662 3787 | L.DStr _ => true
adam@1662 3788 | L.DConstraint _ => true
adam@1662 3789 | _ => false
adam@1662 3790 in
adam@1662 3791 if isCony then
adam@1662 3792 (ds, acc)
adam@1662 3793 else
adam@1662 3794 findLast (ds', d :: acc)
adam@1662 3795 end
adam@1662 3796
adam@1662 3797 val (dPrefix, dSuffix) = findLast (rev ds, [])
adam@1662 3798
adamc@1270 3799 fun extend (env, nd, ds) =
adamc@1264 3800 let
adamc@1264 3801 val ds' = List.mapPartial (fn (env', (c1, c2), loc) =>
adamc@1264 3802 case (decompileCon env' c1, decompileCon env' c2) of
adamc@1264 3803 (SOME c1, SOME c2) =>
adamc@1264 3804 SOME (L.DConstraint (c1, c2), loc)
adam@1586 3805 | _ => NONE) (nconstraints nd)
adamc@1264 3806
adamc@1264 3807 val ds' =
adamc@1264 3808 case SS.listItems (nvals nd) of
adamc@1264 3809 [] => ds'
adamc@1264 3810 | xs =>
adamc@1264 3811 let
adamc@1264 3812 val ewild = (L.EWild, #2 str)
adamc@1264 3813 val ds'' = map (fn x => (L.DVal (x, NONE, ewild), #2 str)) xs
adamc@1264 3814 in
adamc@1264 3815 ds'' @ ds'
adamc@1264 3816 end
adamc@1264 3817
adamc@1275 3818 val ds' =
adam@1640 3819 case ncons nd of
adamc@1275 3820 [] => ds'
adamc@1264 3821 | xs =>
adam@1570 3822 map (fn (x, k) =>
adamc@1270 3823 let
adamc@1270 3824 val k =
adamc@1270 3825 case decompileKind k of
adamc@1270 3826 NONE => (L.KWild, #2 str)
adamc@1270 3827 | SOME k => k
adamc@1275 3828
adamc@1270 3829 val cwild = (L.CWild k, #2 str)
adamc@1270 3830 in
adam@1570 3831 (L.DCon (x, NONE, cwild), #2 str)
adamc@1275 3832 end) xs @ ds'
adamc@1275 3833
adamc@1275 3834 val ds = ds @ ds'
adamc@1264 3835 in
adam@1868 3836 map (fn d as (L.DStr (x, s, tm, (L.StrConst ds', loc'), r), loc) =>
adamc@1270 3837 (case SM.find (nmods nd, x) of
adamc@1270 3838 NONE => d
adamc@1270 3839 | SOME (env, nd') =>
adam@1868 3840 (L.DStr (x, s, tm, (L.StrConst (extend (env, nd', ds')), loc'), r), loc))
adamc@1270 3841 | d => d) ds
adamc@1264 3842 end
adamc@325 3843 in
adam@1662 3844 (L.StrConst (extend (env, nd, rev dPrefix) @ dSuffix), #2 str)
adamc@325 3845 end
adamc@325 3846 | _ => str)
adamc@325 3847 | _ => str
adamc@325 3848
adamc@706 3849 and elabDecl (dAll as (d, loc), (env, denv, gs)) =
adamc@255 3850 let
adamc@904 3851 (*val () = preface ("elabDecl", SourcePrint.p_decl dAll)*)
adamc@514 3852 (*val befor = Time.now ()*)
adamc@255 3853
adamc@255 3854 val r =
adamc@255 3855 case d of
adamc@255 3856 L.DCon (x, ko, c) =>
adamc@255 3857 let
adamc@255 3858 val k' = case ko of
adam@1639 3859 NONE => kunif env loc
adamc@623 3860 | SOME k => elabKind env k
adamc@255 3861
adamc@255 3862 val (c', ck, gs') = elabCon (env, denv) c
adamc@255 3863 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@255 3864 in
adamc@255 3865 checkKind env c' ck k';
adamc@255 3866
adamc@255 3867 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, enD gs' @ gs))
adamc@255 3868 end
adamc@805 3869 | L.DDatatype dts =>
adamc@255 3870 let
adamc@255 3871 val k = (L'.KType, loc)
adamc@805 3872
adamc@805 3873 val (dts, env) = ListUtil.foldlMap
adamc@805 3874 (fn ((x, xs, xcs), env) =>
adamc@805 3875 let
adamc@805 3876 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@805 3877 val (env, n) = E.pushCNamed env x k' NONE
adamc@805 3878 in
adamc@805 3879 ((x, n, xs, xcs), env)
adamc@805 3880 end)
adamc@805 3881 env dts
adamc@805 3882
adamc@805 3883 val (dts, (env, gs')) = ListUtil.foldlMap
adamc@805 3884 (fn ((x, n, xs, xcs), (env, gs')) =>
adamc@805 3885 let
adamc@805 3886 val t = (L'.CNamed n, loc)
adamc@805 3887 val nxs = length xs - 1
adamc@805 3888 val t = ListUtil.foldli
adamc@805 3889 (fn (i, _, t) =>
adamc@805 3890 (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@805 3891
adamc@805 3892 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@805 3893 (E.pushCRel env' x k,
adamc@805 3894 D.enter denv')) (env, denv) xs
adamc@805 3895
adamc@805 3896 val (xcs, (used, env, gs')) =
adamc@805 3897 ListUtil.foldlMap
adamc@805 3898 (fn ((x, to), (used, env, gs)) =>
adamc@805 3899 let
adamc@805 3900 val (to, t, gs') = case to of
adamc@805 3901 NONE => (NONE, t, gs)
adamc@805 3902 | SOME t' =>
adamc@805 3903 let
adamc@805 3904 val (t', tk, gs') = elabCon (env', denv') t'
adamc@805 3905 in
adamc@805 3906 checkKind env' t' tk k;
adamc@805 3907 (SOME t', (L'.TFun (t', t), loc), enD gs' @ gs)
adamc@805 3908 end
adamc@805 3909 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@805 3910
adamc@805 3911 val (env, n') = E.pushENamed env x t
adamc@805 3912 in
adamc@805 3913 if SS.member (used, x) then
adamc@805 3914 strError env (DuplicateConstructor (x, loc))
adamc@805 3915 else
adamc@805 3916 ();
adamc@805 3917 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@805 3918 end)
adamc@805 3919 (SS.empty, env, gs') xcs
adamc@805 3920 in
adamc@805 3921 ((x, n, xs, xcs), (E.pushDatatype env n xs xcs, gs'))
adamc@805 3922 end)
adamc@805 3923 (env, []) dts
adamc@255 3924 in
adamc@805 3925 ([(L'.DDatatype dts, loc)], (env, denv, gs' @ gs))
adamc@255 3926 end
adamc@255 3927
adamc@255 3928 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@255 3929
adamc@255 3930 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@255 3931 (case E.lookupStr env m1 of
adamc@255 3932 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@255 3933 ([], (env, denv, gs)))
adamc@255 3934 | SOME (n, sgn) =>
adamc@255 3935 let
adamc@255 3936 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@255 3937 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@255 3938 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@255 3939 (strerror, sgnerror))
adamc@255 3940 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@255 3941 ((L'.StrVar n, loc), sgn) ms
adamc@255 3942 in
adamc@628 3943 case hnormCon env (L'.CModProj (n, ms, s), loc) of
adamc@628 3944 (L'.CModProj (n, ms, s), _) =>
adamc@255 3945 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@255 3946 NONE => (conError env (UnboundDatatype (loc, s));
adamc@255 3947 ([], (env, denv, gs)))
adamc@255 3948 | SOME (xs, xncs) =>
adamc@255 3949 let
adamc@255 3950 val k = (L'.KType, loc)
adamc@255 3951 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@255 3952 val t = (L'.CModProj (n, ms, s), loc)
adamc@255 3953 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@255 3954 val env = E.pushDatatype env n' xs xncs
adamc@255 3955
adamc@255 3956 val t = (L'.CNamed n', loc)
adamc@844 3957 val nxs = length xs
adamc@844 3958 val t = ListUtil.foldli (fn (i, _, t) =>
adamc@844 3959 (L'.CApp (t, (L'.CRel (nxs - 1 - i), loc)), loc))
adamc@844 3960 t xs
adamc@255 3961 val env = foldl (fn ((x, n, to), env) =>
adamc@255 3962 let
adamc@255 3963 val t = case to of
adamc@255 3964 NONE => t
adamc@255 3965 | SOME t' => (L'.TFun (t', t), loc)
adamc@255 3966
adamc@255 3967 val t = foldr (fn (x, t) =>
adamc@255 3968 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@255 3969 t xs
adamc@255 3970 in
adamc@255 3971 E.pushENamedAs env x n t
adamc@255 3972 end) env xncs
adamc@255 3973 in
adamc@628 3974 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@255 3975 end)
adamc@255 3976 | _ => (strError env (NotDatatype loc);
adamc@255 3977 ([], (env, denv, [])))
adamc@255 3978 end)
adamc@255 3979
adamc@255 3980 | L.DVal (x, co, e) =>
adamc@255 3981 let
adamc@255 3982 val (c', _, gs1) = case co of
adam@1639 3983 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255 3984 | SOME c => elabCon (env, denv) c
adamc@255 3985
adamc@255 3986 val (e', et, gs2) = elabExp (env, denv) e
adamc@629 3987
adamc@629 3988 val () = checkCon env e' et c'
adamc@629 3989
adamc@674 3990 val c' = normClassConstraint env c'
adamc@255 3991 val (env', n) = E.pushENamed env x c'
adamc@255 3992 in
adamc@255 3993 (*prefaces "DVal" [("x", Print.PD.string x),
adamc@362 3994 ("c'", p_con env c')];*)
adamc@628 3995 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, enD gs1 @ gs2 @ gs))
adamc@255 3996 end
adamc@255 3997 | L.DValRec vis =>
adamc@255 3998 let
adamc@255 3999 fun allowable (e, _) =
adamc@255 4000 case e of
adamc@255 4001 L.EAbs _ => true
adamc@255 4002 | L.ECAbs (_, _, _, e) => allowable e
adamc@623 4003 | L.EKAbs (_, e) => allowable e
adamc@255 4004 | L.EDisjoint (_, _, e) => allowable e
adamc@255 4005 | _ => false
adamc@255 4006
adamc@255 4007 val (vis, gs) = ListUtil.foldlMap
adamc@255 4008 (fn ((x, co, e), gs) =>
adamc@255 4009 let
adamc@255 4010 val (c', _, gs1) = case co of
adam@1639 4011 NONE => (cunif env (loc, ktype), ktype, [])
adamc@255 4012 | SOME c => elabCon (env, denv) c
adamc@674 4013 val c' = normClassConstraint env c'
adamc@255 4014 in
adamc@255 4015 ((x, c', e), enD gs1 @ gs)
adamc@280 4016 end) gs vis
adamc@255 4017
adamc@255 4018 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@255 4019 let
adamc@255 4020 val (env, n) = E.pushENamed env x c'
adamc@255 4021 in
adamc@255 4022 ((x, n, c', e), env)
adamc@255 4023 end) env vis
adamc@255 4024
adamc@255 4025 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@255 4026 let
adamc@255 4027 val (e', et, gs1) = elabExp (env, denv) e
adamc@255 4028 in
adamc@628 4029 checkCon env e' et c';
adamc@255 4030 if allowable e then
adamc@255 4031 ()
adamc@255 4032 else
adamc@255 4033 expError env (IllegalRec (x, e'));
adamc@628 4034 ((x, n, c', e'), gs1 @ gs)
adamc@255 4035 end) gs vis
adam@1736 4036
adam@1736 4037 val vis = map (fn (x, n, t, e) => (x, n, normClassConstraint env t, e)) vis
adam@1736 4038 val d = (L'.DValRec vis, loc)
adamc@255 4039 in
adam@1736 4040 ([d], (E.declBinds env d, denv, gs))
adamc@255 4041 end
adamc@255 4042
adamc@255 4043 | L.DSgn (x, sgn) =>
adamc@255 4044 let
adamc@255 4045 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@255 4046 val (env', n) = E.pushSgnNamed env x sgn'
adamc@255 4047 in
adamc@255 4048 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, enD gs' @ gs))
adamc@255 4049 end
adamc@255 4050
adam@1868 4051 | L.DStr (x, sgno, tmo, str, _) =>
adam@1732 4052 (case ModDb.lookup dAll of
adam@1732 4053 SOME d =>
adam@1732 4054 let
adam@1744 4055 val () = if !verbose then TextIO.print ("REUSE: " ^ x ^ "\n") else ()
adam@1732 4056 val env' = E.declBinds env d
adam@1732 4057 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4058 in
adam@1738 4059 ([d], (env', denv', gs))
adam@1732 4060 end
adam@1732 4061 | NONE =>
adam@1732 4062 let
adam@1744 4063 val () = if !verbose then TextIO.print ("CHECK: " ^ x ^ "\n") else ()
adam@1744 4064
adam@1732 4065 val () = if x = "Basis" then
adam@1732 4066 raise Fail "Not allowed to redefine structure 'Basis'"
adam@1732 4067 else
adam@1732 4068 ()
adam@1732 4069
adam@1732 4070 val formal = Option.map (elabSgn (env, denv)) sgno
adam@1732 4071
adam@1732 4072 val (str', sgn', gs') =
adam@1732 4073 case formal of
adam@1732 4074 NONE =>
adam@1732 4075 let
adam@1732 4076 val (str', actual, gs') = elabStr (env, denv) str
adam@1732 4077 in
adam@1732 4078 (str', selfifyAt env {str = str', sgn = actual}, gs')
adam@1732 4079 end
adam@1732 4080 | SOME (formal, gs1) =>
adam@1732 4081 let
adam@1732 4082 val str = wildifyStr env (str, formal)
adam@1732 4083 val (str', actual, gs2) = elabStr (env, denv) str
adam@1732 4084 in
adam@1732 4085 subSgn env loc (selfifyAt env {str = str', sgn = actual}) formal;
adam@1732 4086 (str', formal, enD gs1 @ gs2)
adam@1732 4087 end
adam@1732 4088
adam@1732 4089 val (env', n) = E.pushStrNamed env x sgn'
adam@1883 4090
adam@1732 4091 val denv' =
adam@1732 4092 case #1 str' of
adam@1732 4093 L'.StrConst _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4094 | L'.StrApp _ => dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4095 | _ => denv
adam@1732 4096
adam@1732 4097 val dNew = (L'.DStr (x, n, sgn', str'), loc)
adam@1732 4098 in
adam@1732 4099 case #1 (hnormSgn env sgn') of
adam@1732 4100 L'.SgnFun _ =>
adam@1732 4101 (case #1 str' of
adam@1732 4102 L'.StrFun _ => ()
adam@1732 4103 | _ => strError env (FunctorRebind loc))
adam@1732 4104 | _ => ();
adam@1732 4105 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732 4106 ([dNew], (env', denv', gs' @ gs))
adam@1732 4107 end)
adam@1732 4108
adam@1733 4109 | L.DFfiStr (x, sgn, tmo) =>
adam@1732 4110 (case ModDb.lookup dAll of
adam@1732 4111 SOME d =>
adam@1732 4112 let
adam@1732 4113 val env' = E.declBinds env d
adam@1732 4114 val denv' = dopenConstraints (loc, env', denv) {str = x, strs = []}
adam@1732 4115 in
adam@1732 4116 ([d], (env', denv', []))
adam@1732 4117 end
adam@1732 4118 | NONE =>
adam@1732 4119 let
adam@1732 4120 val (sgn', gs') = elabSgn (env, denv) sgn
adam@1732 4121
adam@1732 4122 val (env', n) = E.pushStrNamed env x sgn'
adam@1732 4123
adam@1732 4124 val dNew = (L'.DFfiStr (x, n, sgn'), loc)
adam@1732 4125 in
adam@1733 4126 Option.map (fn tm => ModDb.insert (dNew, tm)) tmo;
adam@1732 4127 ([dNew], (env', denv, enD gs' @ gs))
adam@1732 4128 end)
adamc@255 4129
adamc@255 4130 | L.DOpen (m, ms) =>
adamc@255 4131 (case E.lookupStr env m of
adamc@255 4132 NONE => (strError env (UnboundStr (loc, m));
adamc@255 4133 ([], (env, denv, gs)))
adamc@255 4134 | SOME (n, sgn) =>
adamc@255 4135 let
adamc@1030 4136 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@1030 4137 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@1030 4138 NONE => (strError env (UnboundStr (loc, m));
adamc@1030 4139 (strerror, sgnerror))
adamc@1030 4140 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@1030 4141 ((L'.StrVar n, loc), sgn) ms
adamc@1030 4142
adamc@1030 4143 val sgn = selfifyAt env {str = str, sgn = sgn}
adamc@255 4144
adamc@628 4145 val (ds, env') = dopen env {str = n, strs = ms, sgn = sgn}
adamc@628 4146 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = ms}
adamc@255 4147 in
adamc@255 4148 (ds, (env', denv', gs))
adamc@255 4149 end)
adamc@255 4150
adamc@255 4151 | L.DConstraint (c1, c2) =>
adamc@255 4152 let
adamc@255 4153 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@255 4154 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@255 4155 val gs3 = D.prove env denv (c1', c2', loc)
adamc@255 4156
adamc@628 4157 val denv' = D.assert env denv (c1', c2')
adamc@255 4158 in
adam@1639 4159 checkKind env c1' k1 (L'.KRecord (kunif env loc), loc);
adam@1639 4160 checkKind env c2' k2 (L'.KRecord (kunif env loc), loc);
adamc@255 4161
adamc@628 4162 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', enD gs1 @ enD gs2 @ enD gs3 @ gs))
adamc@255 4163 end
adamc@255 4164
adamc@255 4165 | L.DOpenConstraints (m, ms) =>
adamc@255 4166 let
adamc@255 4167 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@255 4168 in
adamc@255 4169 ([], (env, denv, gs))
adamc@255 4170 end
adamc@255 4171
adamc@255 4172 | L.DExport str =>
adamc@255 4173 let
adamc@255 4174 val (str', sgn, gs') = elabStr (env, denv) str
adamc@255 4175
adamc@255 4176 val sgn =
adamc@255 4177 case #1 (hnormSgn env sgn) of
adamc@255 4178 L'.SgnConst sgis =>
adamc@255 4179 let
adamc@255 4180 fun doOne (all as (sgi, _), env) =
adamc@255 4181 (case sgi of
adamc@255 4182 L'.SgiVal (x, n, t) =>
adamc@325 4183 let
adamc@325 4184 fun doPage (makeRes, ran) =
adamc@628 4185 case hnormCon env ran of
adamc@628 4186 (L'.CApp (tf, arg), _) =>
adamc@628 4187 (case (hnormCon env tf, hnormCon env arg) of
adamc@628 4188 ((L'.CModProj (basis, [], "transaction"), _),
adamc@720 4189 (L'.CApp (tf, arg3), _)) =>
adamc@325 4190 (case (basis = !basis_r,
adamc@720 4191 hnormCon env tf, hnormCon env arg3) of
adamc@325 4192 (true,
adamc@720 4193 (L'.CApp (tf, arg2), _),
adamc@628 4194 ((L'.CRecord (_, []), _))) =>
adamc@720 4195 (case (hnormCon env tf) of
adamc@720 4196 (L'.CApp (tf, arg1), _) =>
adamc@720 4197 (case (hnormCon env tf,
adamc@720 4198 hnormCon env arg1,
adamc@720 4199 hnormCon env arg2) of
adamc@720 4200 (tf, arg1,
adamc@720 4201 (L'.CRecord (_, []), _)) =>
adamc@720 4202 let
adamc@720 4203 val t = (L'.CApp (tf, arg1), loc)
adamc@720 4204 val t = (L'.CApp (t, arg2), loc)
adamc@720 4205 val t = (L'.CApp (t, arg3), loc)
adamc@720 4206 val t = (L'.CApp (
adamc@720 4207 (L'.CModProj
adamc@720 4208 (basis, [], "transaction"), loc),
adamc@325 4209 t), loc)
adam@1347 4210
adam@1347 4211 fun normArgs t =
adam@1347 4212 case hnormCon env t of
adam@1347 4213 (L'.TFun (dom, ran), loc) =>
adam@1347 4214 (L'.TFun (hnormCon env dom, normArgs ran), loc)
adam@1347 4215 | t' => t'
adamc@720 4216 in
adam@1347 4217 (L'.SgiVal (x, n, normArgs (makeRes t)), loc)
adamc@720 4218 end
adamc@325 4219 | _ => all)
adamc@325 4220 | _ => all)
adamc@325 4221 | _ => all)
adamc@325 4222 | _ => all)
adamc@325 4223 | _ => all
adamc@325 4224 in
adamc@628 4225 case hnormCon env t of
adamc@628 4226 (L'.TFun (dom, ran), _) =>
adamc@628 4227 (case hnormCon env dom of
adamc@628 4228 (L'.TRecord domR, _) =>
adamc@325 4229 doPage (fn t => (L'.TFun ((L'.TRecord domR,
adamc@325 4230 loc),
adamc@325 4231 t), loc), ran)
adamc@325 4232 | _ => all)
adamc@325 4233 | _ => doPage (fn t => t, t)
adamc@325 4234 end
adamc@255 4235 | _ => all,
adamc@255 4236 E.sgiBinds env all)
adamc@255 4237 in
adamc@255 4238 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@255 4239 end
adamc@255 4240 | _ => sgn
adamc@255 4241 in
adamc@255 4242 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@255 4243 end
adamc@255 4244
adamc@707 4245 | L.DTable (x, c, pe, ce) =>
adamc@255 4246 let
adamc@707 4247 val cstK = (L'.KRecord (L'.KRecord (L'.KUnit, loc), loc), loc)
adamc@707 4248
adamc@255 4249 val (c', k, gs') = elabCon (env, denv) c
adam@1639 4250 val pkey = cunif env (loc, cstK)
adam@1639 4251 val uniques = cunif env (loc, cstK)
adamc@705 4252
adamc@705 4253 val ct = tableOf ()
adamc@705 4254 val ct = (L'.CApp (ct, c'), loc)
adamc@707 4255 val ct = (L'.CApp (ct, (L'.CConcat (pkey, uniques), loc)), loc)
adamc@705 4256
adamc@705 4257 val (env, n) = E.pushENamed env x ct
adamc@707 4258 val (pe', pet, gs'') = elabExp (env, denv) pe
adamc@707 4259 val (ce', cet, gs''') = elabExp (env, denv) ce
adamc@707 4260
adamc@707 4261 val pst = (L'.CModProj (!basis_r, [], "primary_key"), loc)
adamc@707 4262 val pst = (L'.CApp (pst, c'), loc)
adamc@707 4263 val pst = (L'.CApp (pst, pkey), loc)
adamc@704 4264
adamc@704 4265 val cst = (L'.CModProj (!basis_r, [], "sql_constraints"), loc)
adamc@704 4266 val cst = (L'.CApp (cst, c'), loc)
adamc@705 4267 val cst = (L'.CApp (cst, uniques), loc)
adamc@255 4268 in
adamc@255 4269 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@707 4270 checkCon env pe' pet pst;
adamc@707 4271 checkCon env ce' cet cst;
adamc@707 4272 ([(L'.DTable (!basis_r, x, n, c', pe', pkey, ce', uniques), loc)],
adamc@707 4273 (env, denv, gs''' @ gs'' @ enD gs' @ gs))
adamc@255 4274 end
adamc@338 4275 | L.DSequence x =>
adamc@338 4276 let
adamc@338 4277 val (env, n) = E.pushENamed env x (sequenceOf ())
adamc@338 4278 in
adamc@338 4279 ([(L'.DSequence (!basis_r, x, n), loc)], (env, denv, gs))
adamc@338 4280 end
adamc@754 4281 | L.DView (x, e) =>
adamc@754 4282 let
adamc@754 4283 val (e', t, gs') = elabExp (env, denv) e
adamc@754 4284
adamc@754 4285 val k = (L'.KRecord (L'.KType, loc), loc)
adam@1639 4286 val fs = cunif env (loc, k)
adam@1639 4287 val ts = cunif env (loc, (L'.KRecord k, loc))
adamc@754 4288 val tf = (L'.CApp ((L'.CMap (k, k), loc),
adamc@754 4289 (L'.CAbs ("_", k, (L'.CRecord ((L'.KType, loc), []), loc)), loc)), loc)
adamc@754 4290 val ts = (L'.CApp (tf, ts), loc)
adamc@754 4291
adamc@754 4292 val cv = viewOf ()
adamc@754 4293 val cv = (L'.CApp (cv, fs), loc)
adamc@754 4294 val (env', n) = E.pushENamed env x cv
adamc@754 4295
adamc@754 4296 val ct = queryOf ()
adamc@1191 4297 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adam@1395 4298 val ct = (L'.CApp (ct, (L'.CRecord ((L'.KRecord (L'.KType, loc), loc), []), loc)), loc)
adamc@754 4299 val ct = (L'.CApp (ct, ts), loc)
adamc@754 4300 val ct = (L'.CApp (ct, fs), loc)
adamc@754 4301 in
adamc@754 4302 checkCon env e' t ct;
adamc@754 4303 ([(L'.DView (!basis_r, x, n, e', fs), loc)],
adamc@754 4304 (env', denv, gs' @ gs))
adamc@754 4305 end
adamc@255 4306
adamc@280 4307 | L.DDatabase s => ([(L'.DDatabase s, loc)], (env, denv, gs))
adamc@280 4308
adamc@459 4309 | L.DCookie (x, c) =>
adamc@459 4310 let
adamc@459 4311 val (c', k, gs') = elabCon (env, denv) c
adamc@459 4312 val (env, n) = E.pushENamed env x (L'.CApp (cookieOf (), c'), loc)
adamc@459 4313 in
adamc@459 4314 checkKind env c' k (L'.KType, loc);
adamc@459 4315 ([(L'.DCookie (!basis_r, x, n, c'), loc)], (env, denv, enD gs' @ gs))
adamc@459 4316 end
adamc@720 4317 | L.DStyle x =>
adamc@718 4318 let
adamc@720 4319 val (env, n) = E.pushENamed env x (styleOf ())
adamc@718 4320 in
adamc@720 4321 ([(L'.DStyle (!basis_r, x, n), loc)], (env, denv, gs))
adamc@718 4322 end
adamc@1075 4323 | L.DTask (e1, e2) =>
adamc@1073 4324 let
adamc@1075 4325 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1075 4326 val (e2', t2, gs2) = elabExp (env, denv) e2
adamc@1075 4327
adam@1639 4328 val targ = cunif env (loc, (L'.KType, loc))
adam@1348 4329
adamc@1075 4330 val t1' = (L'.CModProj (!basis_r, [], "task_kind"), loc)
adam@1348 4331 val t1' = (L'.CApp (t1', targ), loc)
adam@1348 4332
adamc@1075 4333 val t2' = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc),
adamc@1075 4334 (L'.TRecord (L'.CRecord ((L'.KType, loc), []), loc), loc)), loc)
adam@1348 4335 val t2' = (L'.TFun (targ, t2'), loc)
adamc@1073 4336 in
adamc@1075 4337 checkCon env e1' t1 t1';
adamc@1075 4338 checkCon env e2' t2 t2';
adamc@1075 4339 ([(L'.DTask (e1', e2'), loc)], (env, denv, gs2 @ gs1 @ gs))
adamc@1073 4340 end
adamc@1199 4341 | L.DPolicy e1 =>
adamc@1199 4342 let
adamc@1199 4343 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@1199 4344
adamc@1199 4345 val t1' = (L'.CModProj (!basis_r, [], "sql_policy"), loc)
adamc@1199 4346 in
adamc@1199 4347 checkCon env e1' t1 t1';
adamc@1199 4348 ([(L'.DPolicy e1', loc)], (env, denv, gs1 @ gs))
adamc@1199 4349 end
adamc@459 4350
adam@1294 4351 | L.DOnError (m1, ms, s) =>
adam@1294 4352 (case E.lookupStr env m1 of
adam@1294 4353 NONE => (expError env (UnboundStrInExp (loc, m1));
adam@1294 4354 ([], (env, denv, [])))
adam@1294 4355 | SOME (n, sgn) =>
adam@1294 4356 let
adam@1294 4357 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adam@1294 4358 case E.projectStr env {sgn = sgn, str = str, field = m} of
adam@1294 4359 NONE => (conError env (UnboundStrInCon (loc, m));
adam@1294 4360 (strerror, sgnerror))
adam@1294 4361 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adam@1294 4362 ((L'.StrVar n, loc), sgn) ms
adam@1294 4363
adam@1294 4364 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adam@1294 4365 NONE => (expError env (UnboundExp (loc, s));
adam@1294 4366 cerror)
adam@1294 4367 | SOME t => t
adam@1294 4368
adam@1294 4369 val page = (L'.CModProj (!basis_r, [], "page"), loc)
adam@1294 4370 val xpage = (L'.CApp ((L'.CModProj (!basis_r, [], "transaction"), loc), page), loc)
adam@1294 4371 val func = (L'.TFun ((L'.CModProj (!basis_r, [], "xbody"), loc), xpage), loc)
adam@1294 4372 in
adam@1407 4373 (unifyCons env loc t func
adam@1407 4374 handle CUnify _ => ErrorMsg.error "onError handler has wrong type.");
adam@1294 4375 ([(L'.DOnError (n, ms, s), loc)], (env, denv, gs))
adam@1294 4376 end)
adam@1294 4377
adam@2010 4378 | L.DFfi (x, modes, t) =>
adam@2010 4379 let
adam@2010 4380 val () = if Settings.getLessSafeFfi () then
adam@2010 4381 ()
adam@2010 4382 else
adam@2010 4383 ErrorMsg.errorAt loc "To enable 'ffi' declarations, the .urp directive 'lessSafeFfi' is mandatory."
adam@2010 4384
adam@2010 4385 val (t', _, gs1) = elabCon (env, denv) t
adam@2010 4386 val t' = normClassConstraint env t'
adam@2010 4387 val (env', n) = E.pushENamed env x t'
adam@2010 4388 in
adam@2010 4389 ([(L'.DFfi (x, n, modes, t'), loc)], (env', denv, enD gs1 @ gs))
adam@2010 4390 end
adam@2010 4391
adamc@280 4392 (*val tcs = List.filter (fn TypeClass _ => true | _ => false) (#3 (#2 r))*)
adamc@255 4393 in
adam@1989 4394 (*prefaces "/elabDecl" [("d", SourcePrint.p_decl dAll),
adam@1989 4395 ("d'", p_list_sep PD.newline (ElabPrint.p_decl env) (#1 r))];*)
adamc@255 4396 r
adamc@255 4397 end
adamc@211 4398
adamc@83 4399 and elabStr (env, denv) (str, loc) =
adamc@31 4400 case str of
adamc@31 4401 L.StrConst ds =>
adamc@31 4402 let
adamc@88 4403 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 4404 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 4405
adamc@63 4406 val (sgis, _, _, _, _) =
adamc@64 4407 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 4408 case sgi of
adamc@64 4409 L'.SgiConAbs (x, n, k) =>
adamc@64 4410 let
adamc@64 4411 val (cons, x) =
adamc@64 4412 if SS.member (cons, x) then
adamc@64 4413 (cons, "?" ^ x)
adamc@64 4414 else
adamc@64 4415 (SS.add (cons, x), x)
adamc@64 4416 in
adamc@64 4417 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4418 end
adamc@64 4419 | L'.SgiCon (x, n, k, c) =>
adamc@64 4420 let
adamc@64 4421 val (cons, x) =
adamc@64 4422 if SS.member (cons, x) then
adamc@64 4423 (cons, "?" ^ x)
adamc@64 4424 else
adamc@64 4425 (SS.add (cons, x), x)
adamc@64 4426 in
adamc@64 4427 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4428 end
adamc@805 4429 | L'.SgiDatatype dts =>
adamc@156 4430 let
adamc@805 4431 fun doOne ((x, n, xs, xncs), (cons, vals)) =
adamc@805 4432 let
adamc@805 4433 val (cons, x) =
adamc@805 4434 if SS.member (cons, x) then
adamc@805 4435 (cons, "?" ^ x)
adamc@156 4436 else
adamc@805 4437 (SS.add (cons, x), x)
adamc@805 4438
adamc@805 4439 val (xncs, vals) =
adamc@805 4440 ListUtil.foldlMap
adamc@805 4441 (fn ((x, n, t), vals) =>
adamc@805 4442 if SS.member (vals, x) then
adamc@805 4443 (("?" ^ x, n, t), vals)
adamc@805 4444 else
adamc@805 4445 ((x, n, t), SS.add (vals, x)))
adamc@805 4446 vals xncs
adamc@805 4447 in
adamc@805 4448 ((x, n, xs, xncs), (cons, vals))
adamc@805 4449 end
adamc@805 4450
adamc@805 4451 val (dts, (cons, vals)) = ListUtil.foldlMap doOne (cons, vals) dts
adamc@156 4452 in
adamc@805 4453 ((L'.SgiDatatype dts, loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4454 end
adamc@191 4455 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 4456 let
adamc@156 4457 val (cons, x) =
adamc@156 4458 if SS.member (cons, x) then
adamc@156 4459 (cons, "?" ^ x)
adamc@156 4460 else
adamc@156 4461 (SS.add (cons, x), x)
adamc@156 4462 in
adamc@191 4463 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 4464 end
adamc@64 4465 | L'.SgiVal (x, n, c) =>
adamc@64 4466 let
adamc@64 4467 val (vals, x) =
adamc@64 4468 if SS.member (vals, x) then
adamc@64 4469 (vals, "?" ^ x)
adamc@64 4470 else
adamc@64 4471 (SS.add (vals, x), x)
adamc@64 4472 in
adamc@64 4473 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4474 end
adamc@64 4475 | L'.SgiSgn (x, n, sgn) =>
adamc@64 4476 let
adamc@64 4477 val (sgns, x) =
adamc@64 4478 if SS.member (sgns, x) then
adamc@64 4479 (sgns, "?" ^ x)
adamc@64 4480 else
adamc@64 4481 (SS.add (sgns, x), x)
adamc@64 4482 in
adamc@64 4483 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 4484 end
adamc@64 4485
adamc@64 4486 | L'.SgiStr (x, n, sgn) =>
adamc@64 4487 let
adamc@64 4488 val (strs, x) =
adamc@64 4489 if SS.member (strs, x) then
adamc@64 4490 (strs, "?" ^ x)
adamc@64 4491 else
adamc@64 4492 (SS.add (strs, x), x)
adamc@64 4493 in
adamc@64 4494 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 4495 end
adamc@203 4496 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@563 4497 | L'.SgiClassAbs (x, n, k) =>
adamc@211 4498 let
adamc@211 4499 val (cons, x) =
adamc@211 4500 if SS.member (cons, x) then
adamc@211 4501 (cons, "?" ^ x)
adamc@211 4502 else
adamc@211 4503 (SS.add (cons, x), x)
adamc@211 4504 in
adamc@563 4505 ((L'.SgiClassAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 4506 end
adamc@563 4507 | L'.SgiClass (x, n, k, c) =>
adamc@211 4508 let
adamc@211 4509 val (cons, x) =
adamc@211 4510 if SS.member (cons, x) then
adamc@211 4511 (cons, "?" ^ x)
adamc@211 4512 else
adamc@211 4513 (SS.add (cons, x), x)
adamc@211 4514 in
adamc@563 4515 ((L'.SgiClass (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 4516 end)
adamc@64 4517
adamc@63 4518 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 4519 in
adamc@83 4520 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 4521 end
adamc@31 4522 | L.StrVar x =>
adamc@31 4523 (case E.lookupStr env x of
adamc@31 4524 NONE =>
adamc@31 4525 (strError env (UnboundStr (loc, x));
adamc@83 4526 (strerror, sgnerror, []))
adamc@83 4527 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 4528 | L.StrProj (str, x) =>
adamc@34 4529 let
adamc@83 4530 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 4531 in
adamc@34 4532 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 4533 NONE => (strError env (UnboundStr (loc, x));
adamc@83 4534 (strerror, sgnerror, []))
adamc@83 4535 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 4536 end
adamc@41 4537 | L.StrFun (m, dom, ranO, str) =>
adamc@41 4538 let
adamc@83 4539 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 4540 val (env', n) = E.pushStrNamed env m dom'
adamc@834 4541 val denv' = dopenConstraints (loc, env', denv) {str = m, strs = []}
adamc@834 4542 val (str', actual, gs2) = elabStr (env', denv') str
adamc@41 4543
adamc@83 4544 val (formal, gs3) =
adamc@41 4545 case ranO of
adamc@83 4546 NONE => (actual, [])
adamc@41 4547 | SOME ran =>
adamc@41 4548 let
adamc@834 4549 val (ran', gs) = elabSgn (env', denv') ran
adamc@41 4550 in
adamc@1000 4551 subSgn env' loc actual ran';
adamc@83 4552 (ran', gs)
adamc@41 4553 end
adamc@41 4554 in
adamc@41 4555 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 4556 (L'.SgnFun (m, n, dom', formal), loc),
adamc@228 4557 enD gs1 @ gs2 @ enD gs3)
adamc@41 4558 end
adamc@44 4559 | L.StrApp (str1, str2) =>
adamc@44 4560 let
adamc@83 4561 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@325 4562 val str2 =
adamc@325 4563 case sgn1 of
adamc@325 4564 (L'.SgnFun (_, _, dom, _), _) =>
adamc@1275 4565 let
adamc@1275 4566 val s = wildifyStr env (str2, dom)
adamc@1275 4567 in
adamc@1275 4568 (*Print.preface ("Wild", SourcePrint.p_str s);*)
adamc@1275 4569 s
adamc@1275 4570 end
adamc@325 4571 | _ => str2
adamc@83 4572 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@1270 4573 in
adamc@44 4574 case #1 (hnormSgn env sgn1) of
adamc@83 4575 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4576 | L'.SgnFun (m, n, dom, ran) =>
adamc@1000 4577 (subSgn env loc sgn2 dom;
adamc@44 4578 case #1 (hnormSgn env ran) of
adamc@83 4579 L'.SgnError => (strerror, sgnerror, [])
adamc@44 4580 | L'.SgnConst sgis =>
adam@1968 4581 let
adam@1968 4582 (* This code handles a tricky case that led to a very nasty bug.
adam@1968 4583 * An invariant about signatures of elaborated modules is that no
adam@1968 4584 * identifier that could appear directly in a program is defined
adam@1968 4585 * twice. We add "?" in front of identifiers where necessary to
adam@1968 4586 * maintain the invariant, but the code below, to extend a functor
adam@1968 4587 * body with a binding for the functor argument, wasn't written
adam@1968 4588 * with the invariant in mind. Luckily for us, references to
adam@1968 4589 * an identifier later within a signature work by globally
adam@1968 4590 * unique index, so we just need to change the string name in the
adam@1989 4591 * new declaration.
adam@1989 4592 *
adam@1989 4593 * ~~~ A few days later.... ~~~
adam@1989 4594 * This is trickier than I thought! We might need to add
adam@1989 4595 * arbitarily many question marks before the module name to
adam@1989 4596 * avoid a clash, since some other code might depend on
adam@1989 4597 * question-mark identifiers generated previously by this
adam@1989 4598 * very code fragment. *)
adam@1989 4599 fun mungeName m =
adam@1968 4600 if List.exists (fn (L'.SgiStr (x, _, _), _) => x = m
adam@1968 4601 | _ => false) sgis then
adam@1989 4602 mungeName ("?" ^ m)
adam@1968 4603 else
adam@1968 4604 m
adam@1989 4605
adam@1989 4606 val m = mungeName m
adam@1968 4607 in
adam@1968 4608 ((L'.StrApp (str1', str2'), loc),
adam@1968 4609 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adam@1968 4610 gs1 @ gs2)
adam@1968 4611 end
adamc@44 4612 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 4613 | _ => (strError env (NotFunctor sgn1);
adamc@83 4614 (strerror, sgnerror, []))
adamc@44 4615 end
adamc@31 4616
adamc@987 4617 fun resolveClass env = E.resolveClass (hnormCon env) (consEq env dummy) env
adamc@833 4618
adam@1732 4619 fun elabFile basis basis_tm topStr topSgn top_tm env file =
adamc@56 4620 let
adam@1737 4621 val () = ModDb.snapshot ()
adam@1737 4622
adamc@713 4623 val () = mayDelay := true
adamc@713 4624 val () = delayedUnifs := []
adamc@830 4625 val () = delayedExhaustives := []
adamc@713 4626
adam@1733 4627 val d = (L.DFfiStr ("Basis", (L.SgnConst basis, ErrorMsg.dummySpan), SOME basis_tm), ErrorMsg.dummySpan)
adam@1732 4628 val (basis_n, env', sgn) =
adam@1733 4629 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732 4630 NONE =>
adam@1732 4631 let
adam@1732 4632 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adam@1732 4633 val () = case gs of
adam@1732 4634 [] => ()
adam@1732 4635 | _ => (app (fn (_, env, _, c1, c2) =>
adam@1732 4636 prefaces "Unresolved"
adam@1732 4637 [("c1", p_con env c1),
adam@1732 4638 ("c2", p_con env c2)]) gs;
adam@1732 4639 raise Fail "Unresolved disjointness constraints in Basis")
adam@1732 4640
adam@1732 4641 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adam@1732 4642 in
adam@1732 4643 ModDb.insert ((L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan), basis_tm);
adam@1732 4644 (basis_n, env', sgn)
adam@1732 4645 end
adam@1732 4646 | SOME (d' as (L'.DFfiStr (_, basis_n, sgn), _)) =>
adam@1732 4647 (basis_n, E.pushStrNamedAs env "Basis" basis_n sgn, sgn)
adam@1732 4648 | _ => raise Fail "Elaborate: Basis impossible"
adam@1732 4649
adamc@210 4650 val () = basis_r := basis_n
adamc@628 4651 val (ds, env') = dopen env' {str = basis_n, strs = [], sgn = sgn}
adamc@56 4652
adamc@56 4653 fun discoverC r x =
adamc@56 4654 case E.lookupC env' x of
adamc@56 4655 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 4656 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 4657 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 4658
adamc@56 4659 val () = discoverC int "int"
adamc@56 4660 val () = discoverC float "float"
adamc@56 4661 val () = discoverC string "string"
adamc@821 4662 val () = discoverC char "char"
adamc@203 4663 val () = discoverC table "sql_table"
adamc@56 4664
adam@1732 4665 val d = (L.DStr ("Top", SOME (L.SgnConst topSgn, ErrorMsg.dummySpan),
adam@1732 4666 SOME (if Time.< (top_tm, basis_tm) then basis_tm else top_tm),
adam@1868 4667 (L.StrConst topStr, ErrorMsg.dummySpan), false), ErrorMsg.dummySpan)
adam@1732 4668 val (top_n, env', topSgn, topStr) =
adam@1733 4669 case (if !incremental then ModDb.lookup d else NONE) of
adam@1732 4670 NONE =>
adam@1732 4671 let
adam@1732 4672 val (topSgn, gs) = elabSgn (env', D.empty) (L.SgnConst topSgn, ErrorMsg.dummySpan)
adam@1732 4673 val () = case gs of
adam@1732 4674 [] => ()
adam@1732 4675 | _ => raise Fail "Unresolved disjointness constraints in top.urs"
adam@1732 4676 val (topStr, topSgn', gs) = elabStr (env', D.empty) (L.StrConst topStr, ErrorMsg.dummySpan)
adam@1732 4677
adam@1732 4678 val () = case gs of
adam@1732 4679 [] => ()
adam@1732 4680 | _ => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1732 4681 (case D.prove env denv (c1, c2, loc) of
adam@1732 4682 [] => ()
adam@1732 4683 | _ =>
adam@1732 4684 (prefaces "Unresolved constraint in top.ur"
adam@1732 4685 [("loc", PD.string (ErrorMsg.spanToString loc)),
adam@1732 4686 ("c1", p_con env c1),
adam@1732 4687 ("c2", p_con env c2)];
adam@1732 4688 raise Fail "Unresolved constraint in top.ur"))
adam@1732 4689 | TypeClass (env, c, r, loc) =>
adam@1732 4690 let
adam@1732 4691 val c = normClassKey env c
adam@1732 4692 in
adam@1732 4693 case resolveClass env c of
adam@1732 4694 SOME e => r := SOME e
adam@1732 4695 | NONE => expError env (Unresolvable (loc, c))
adam@1732 4696 end) gs
adam@1732 4697
adam@1732 4698 val () = subSgn env' ErrorMsg.dummySpan topSgn' topSgn
adam@1732 4699
adam@1732 4700 val (env', top_n) = E.pushStrNamed env' "Top" topSgn
adam@1732 4701 in
adam@1732 4702 ModDb.insert ((L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan), top_tm);
adam@1732 4703 (top_n, env', topSgn, topStr)
adam@1732 4704 end
adam@1732 4705 | SOME (d' as (L'.DStr (_, top_n, topSgn, topStr), _)) =>
adam@1732 4706 (top_n, E.declBinds env' d', topSgn, topStr)
adam@1732 4707 | _ => raise Fail "Elaborate: Top impossible"
adam@1732 4708
adamc@633 4709 val () = top_r := top_n
adamc@325 4710
adamc@628 4711 val (ds', env') = dopen env' {str = top_n, strs = [], sgn = topSgn}
adamc@325 4712
adam@1883 4713 fun elabDecl' x =
adam@1883 4714 (resetKunif ();
adam@1883 4715 resetCunif ();
adam@1883 4716 elabDecl x)
adam@1883 4717
adam@1883 4718 val (file, (env'', _, gs)) = ListUtil.foldlMapConcat elabDecl' (env', D.empty, []) file
adamc@753 4719
adamc@777 4720 fun oneSummaryRound () =
adamc@777 4721 if ErrorMsg.anyErrors () then
adamc@777 4722 ()
adamc@777 4723 else
adamc@777 4724 let
adamc@777 4725 val delayed = !delayedUnifs
adamc@777 4726 in
adamc@777 4727 delayedUnifs := [];
adamc@777 4728 app (fn (loc, env, k, s1, s2) =>
adamc@777 4729 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2))
adamc@777 4730 delayed
adamc@777 4731 end
adam@1576 4732
adam@1576 4733 val checkConstraintErrors = ref (fn () => ())
adam@1723 4734 fun stopHere () = not (!unifyMore) andalso ErrorMsg.anyErrors ()
adamc@56 4735 in
adamc@777 4736 oneSummaryRound ();
adamc@753 4737
adam@1723 4738 if stopHere () then
adamc@753 4739 ()
adamc@753 4740 else
adamc@753 4741 let
adam@1767 4742 fun solver (gs : constraint list) =
adamc@753 4743 let
adamc@753 4744 val (gs, solved) =
adamc@753 4745 ListUtil.foldlMapPartial
adam@1767 4746 (fn (g : constraint, solved) =>
adamc@753 4747 case g of
adamc@753 4748 Disjoint (loc, env, denv, c1, c2) =>
adamc@753 4749 (case D.prove env denv (c1, c2, loc) of
adamc@753 4750 [] => (NONE, true)
adamc@753 4751 | _ => (SOME g, solved))
adamc@753 4752 | TypeClass (env, c, r, loc) =>
adamc@753 4753 let
adamc@753 4754 fun default () = (SOME g, solved)
adam@1767 4755
adam@1767 4756 fun resolver r c =
adam@1767 4757 let
adam@1767 4758 val c = normClassKey env c
adam@1767 4759 in
adam@1767 4760 case resolveClass env c of
adam@1767 4761 SOME e => (r := SOME e;
adam@1767 4762 (NONE, true))
adam@1767 4763 | NONE =>
adam@1767 4764 case #1 (hnormCon env c) of
adam@1767 4765 L'.CApp (f, x) =>
adam@1767 4766 (case (#1 (hnormCon env f), #1 (hnormCon env x)) of
adam@1767 4767 (L'.CKApp (f, _), L'.CRecord (k, xcs)) =>
adam@1767 4768 (case #1 (hnormCon env f) of
adam@1767 4769 L'.CModProj (top_n', [], "folder") =>
adam@1767 4770 if top_n' = top_n then
adam@1767 4771 let
adam@1767 4772 val e = (L'.EModProj (top_n, ["Folder"], "nil"), loc)
adam@1767 4773 val e = (L'.EKApp (e, k), loc)
adam@1767 4774
adam@1767 4775 val (folder, _) = foldr (fn ((x, c), (folder, xcs)) =>
adam@1767 4776 let
adam@1767 4777 val e = (L'.EModProj (top_n, ["Folder"],
adam@1767 4778 "cons"), loc)
adam@1767 4779 val e = (L'.EKApp (e, k), loc)
adam@1767 4780 val e = (L'.ECApp (e,
adam@1767 4781 (L'.CRecord (k, xcs),
adam@1767 4782 loc)), loc)
adam@1767 4783 val e = (L'.ECApp (e, x), loc)
adam@1767 4784 val e = (L'.ECApp (e, c), loc)
adam@1767 4785 val e = (L'.EApp (e, folder), loc)
adam@1767 4786 in
adam@1767 4787 (e, (x, c) :: xcs)
adam@1767 4788 end)
adam@1767 4789 (e, []) xcs
adam@1767 4790 in
adam@1767 4791 (r := SOME folder;
adam@1767 4792 (NONE, true))
adam@1767 4793 end
adam@1767 4794 else
adam@1767 4795 default ()
adam@1767 4796 | _ => default ())
adam@1767 4797 | _ => default ())
adam@1767 4798
adam@1767 4799 | L'.TRecord c' =>
adam@1767 4800 (case #1 (hnormCon env c') of
adam@1767 4801 L'.CRecord (_, xts) =>
adam@1767 4802 let
adam@1767 4803 val witnesses = map (fn (x, t) =>
adam@1767 4804 let
adam@1767 4805 val r = ref NONE
adam@1767 4806 val (opt, _) = resolver r t
adam@1767 4807 in
adam@1767 4808 case opt of
adam@1767 4809 SOME _ => NONE
adam@1767 4810 | NONE =>
adam@1767 4811 case !r of
adam@1767 4812 NONE => NONE
adam@1767 4813 | SOME e =>
adam@1767 4814 SOME (x, e, t)
adam@1767 4815 end) xts
adam@1767 4816 in
adam@1767 4817 if List.all Option.isSome witnesses then
adam@1767 4818 (r := SOME (L'.ERecord (map valOf witnesses), loc);
adam@1767 4819 (NONE, true))
adam@1767 4820 else
adam@1767 4821 (SOME g, solved)
adam@1767 4822 end
adam@1767 4823 | _ => (SOME g, solved))
adam@1767 4824
adam@1767 4825 | _ => default ()
adam@1767 4826 end
adamc@753 4827 in
adam@1767 4828 resolver r c
adamc@753 4829 end)
adamc@753 4830 false gs
adamc@753 4831 in
adamc@753 4832 case (gs, solved) of
adamc@753 4833 ([], _) => ()
adamc@777 4834 | (_, true) => (oneSummaryRound (); solver gs)
adamc@753 4835 | _ =>
adam@1576 4836 checkConstraintErrors :=
adam@1576 4837 (fn () => app (fn Disjoint (loc, env, denv, c1, c2) =>
adam@1576 4838 let
adam@1576 4839 val c1' = ElabOps.hnormCon env c1
adam@1576 4840 val c2' = ElabOps.hnormCon env c2
adam@1576 4841
adam@1576 4842 fun isUnif (c, _) =
adam@1576 4843 case c of
adam@1576 4844 L'.CUnif _ => true
adam@1576 4845 | _ => false
adam@1576 4846
adam@1576 4847 fun maybeAttr (c, _) =
adam@1576 4848 case c of
adam@1576 4849 L'.CRecord ((L'.KType, _), xts) => true
adam@1576 4850 | _ => false
adam@1576 4851 in
adam@1576 4852 ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adam@1576 4853 eprefaces' [("Con 1", p_con env c1),
adam@1576 4854 ("Con 2", p_con env c2),
adam@1576 4855 ("Hnormed 1", p_con env c1'),
adam@1576 4856 ("Hnormed 2", p_con env c2')]
adam@1576 4857
adam@1576 4858 (*app (fn (loc, env, k, s1, s2) =>
adam@1576 4859 eprefaces' [("s1", p_summary env (normalizeRecordSummary env s1)),
adam@1576 4860 ("s2", p_summary env (normalizeRecordSummary env s2))])
adam@1576 4861 (!delayedUnifs);*)
adam@1576 4862 end
adam@1576 4863 | TypeClass (env, c, r, loc) =>
adam@1742 4864 let
adam@1742 4865 val c = normClassKey env c
adam@1742 4866 in
adam@1742 4867 case resolveClass env c of
adam@1767 4868 SOME e => r := SOME e
adam@1742 4869 | NONE => expError env (Unresolvable (loc, c))
adam@1742 4870 end)
adam@1576 4871 gs)
adamc@753 4872 end
adamc@753 4873 in
adamc@753 4874 solver gs
adamc@753 4875 end;
adamc@753 4876
adamc@713 4877 mayDelay := false;
adamc@713 4878
adam@1723 4879 if stopHere () then
adamc@777 4880 ()
adamc@777 4881 else
adamc@777 4882 (app (fn (loc, env, k, s1, s2) =>
adamc@777 4883 unifySummaries env (loc, k, normalizeRecordSummary env s1, normalizeRecordSummary env s2)
adam@1719 4884 handle CUnify' (env', err) => (ErrorMsg.errorAt loc "Error in final record unification";
adam@1719 4885 cunifyError env' err;
adam@1719 4886 case !reducedSummaries of
adam@1719 4887 NONE => ()
adam@1719 4888 | SOME (s1, s2) =>
adam@1719 4889 (ErrorMsg.errorAt loc "Stuck unifying these records after canceling matching pieces:";
adam@1719 4890 eprefaces' [("Have", s1),
adam@1719 4891 ("Need", s2)])))
adamc@777 4892 (!delayedUnifs);
adamc@777 4893 delayedUnifs := []);
adamc@713 4894
adam@1723 4895 if stopHere () then
adam@1346 4896 ()
adam@1346 4897 else
adam@1584 4898 if List.exists kunifsInDecl file then
adam@1584 4899 case U.File.findDecl kunifsInDecl file of
adam@1584 4900 NONE => ()
adam@1584 4901 | SOME d => declError env'' (KunifsRemain [d])
adam@1584 4902 else
adam@1584 4903 ();
adam@1345 4904
adam@1723 4905 if stopHere () then
adam@1346 4906 ()
adam@1346 4907 else
adam@1584 4908 if List.exists cunifsInDecl file then
adam@1584 4909 case U.File.findDecl cunifsInDecl file of
adam@1584 4910 NONE => ()
adam@1584 4911 | SOME d => declError env'' (CunifsRemain [d])
adam@1584 4912 else
adam@1584 4913 ();
adamc@750 4914
adam@1723 4915 if stopHere () then
adamc@830 4916 ()
adamc@830 4917 else
adamc@837 4918 app (fn all as (env, _, _, loc) =>
adamc@830 4919 case exhaustive all of
adamc@830 4920 NONE => ()
adamc@830 4921 | SOME p => expError env (Inexhaustive (loc, p)))
adamc@830 4922 (!delayedExhaustives);
adamc@830 4923
adam@1723 4924 if stopHere () then
adam@1576 4925 ()
adam@1576 4926 else
adam@1576 4927 !checkConstraintErrors ();
adam@1576 4928
adamc@799 4929 (*preface ("file", p_file env' file);*)
adam@1531 4930
adam@1745 4931 if !dumpTypes orelse (!dumpTypesOnError andalso ErrorMsg.anyErrors ()) then
adam@1531 4932 let
adam@1531 4933 open L'
adam@1531 4934 open Print.PD
adam@1531 4935 open Print
adam@1531 4936
adam@1715 4937 fun p_con env c = ElabPrint.p_con env (ElabOps.reduceCon env c)
adam@1715 4938
adam@1531 4939 fun dumpDecl (d, env) =
adam@1531 4940 case #1 d of
adam@1531 4941 DCon (x, _, k, _) => (print (box [string x,
adam@1531 4942 space,
adam@1531 4943 string "::",
adam@1531 4944 space,
adam@1531 4945 p_kind env k,
adam@1531 4946 newline,
adam@1531 4947 newline]);
adam@1531 4948 E.declBinds env d)
adam@1531 4949 | DVal (x, _, t, _) => (print (box [string x,
adam@1531 4950 space,
adam@1531 4951 string ":",
adam@1531 4952 space,
adam@1531 4953 p_con env t,
adam@1531 4954 newline,
adam@1531 4955 newline]);
adam@1531 4956 E.declBinds env d)
adam@1531 4957 | DValRec vis => (app (fn (x, _, t, _) => print (box [string x,
adam@1531 4958 space,
adam@1531 4959 string ":",
adam@1531 4960 space,
adam@1531 4961 p_con env t,
adam@1531 4962 newline,
adam@1531 4963 newline])) vis;
adam@1531 4964 E.declBinds env d)
adam@1531 4965 | DStr (x, _, _, str) => (print (box [string ("<" ^ x ^ ">"),
adam@1531 4966 newline,
adam@1531 4967 newline]);
adam@1531 4968 dumpStr (str, env);
adam@1531 4969 print (box [string ("</" ^ x ^ ">"),
adam@1531 4970 newline,
adam@1531 4971 newline]);
adam@1531 4972 E.declBinds env d)
adam@1531 4973 | _ => E.declBinds env d
adam@1531 4974
adam@1531 4975 and dumpStr (str, env) =
adam@1531 4976 case #1 str of
adam@1531 4977 StrConst ds => ignore (foldl dumpDecl env ds)
adam@1531 4978 | _ => ()
adam@1531 4979 in
adam@1531 4980 ignore (foldl dumpDecl env' file)
adam@1531 4981 end
adam@1531 4982 else
adam@1531 4983 ();
adam@1737 4984
adam@1737 4985 if ErrorMsg.anyErrors () then
adam@1737 4986 ModDb.revert ()
adam@1737 4987 else
adam@1737 4988 ();
adam@1912 4989
adam@1912 4990 (*Print.preface("File", ElabPrint.p_file env file);*)
adam@1345 4991
adamc@325 4992 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan)
adamc@325 4993 :: ds
adamc@325 4994 @ (L'.DStr ("Top", top_n, topSgn, topStr), ErrorMsg.dummySpan)
adamc@325 4995 :: ds' @ file
adamc@56 4996 end
adamc@2 4997
adamc@2 4998 end