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annotate src/elaborate.sml @ 216:38b299373676

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Looking up in a type class from a module
author Adam Chlipala <adamc@hcoop.net>
date Sat, 16 Aug 2008 15:58:25 -0400
parents 0343557355fc
children 56db662ebcfd
rev   line source
adamc@2 1 (* Copyright (c) 2008, Adam Chlipala
adamc@2 2 * All rights reserved.
adamc@2 3 *
adamc@2 4 * Redistribution and use in source and binary forms, with or without
adamc@2 5 * modification, are permitted provided that the following conditions are met:
adamc@2 6 *
adamc@2 7 * - Redistributions of source code must retain the above copyright notice,
adamc@2 8 * this list of conditions and the following disclaimer.
adamc@2 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@2 10 * this list of conditions and the following disclaimer in the documentation
adamc@2 11 * and/or other materials provided with the distribution.
adamc@2 12 * - The names of contributors may not be used to endorse or promote products
adamc@2 13 * derived from this software without specific prior written permission.
adamc@2 14 *
adamc@2 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@2 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@2 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@2 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@2 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@2 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@2 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@2 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@2 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@2 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@2 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@2 26 *)
adamc@2 27
adamc@2 28 structure Elaborate :> ELABORATE = struct
adamc@2 29
adamc@14 30 structure P = Prim
adamc@4 31 structure L = Source
adamc@2 32 structure L' = Elab
adamc@2 33 structure E = ElabEnv
adamc@2 34 structure U = ElabUtil
adamc@82 35 structure D = Disjoint
adamc@2 36
adamc@3 37 open Print
adamc@3 38 open ElabPrint
adamc@3 39
adamc@172 40 structure IM = IntBinaryMap
adamc@175 41
adamc@175 42 structure SK = struct
adamc@175 43 type ord_key = string
adamc@175 44 val compare = String.compare
adamc@175 45 end
adamc@175 46
adamc@175 47 structure SS = BinarySetFn(SK)
adamc@175 48 structure SM = BinaryMapFn(SK)
adamc@62 49
adamc@210 50 val basis_r = ref 0
adamc@210 51
adamc@2 52 fun elabExplicitness e =
adamc@2 53 case e of
adamc@2 54 L.Explicit => L'.Explicit
adamc@2 55 | L.Implicit => L'.Implicit
adamc@2 56
adamc@2 57 fun occursKind r =
adamc@76 58 U.Kind.exists (fn L'.KUnif (_, _, r') => r = r'
adamc@2 59 | _ => false)
adamc@2 60
adamc@3 61 datatype kunify_error =
adamc@2 62 KOccursCheckFailed of L'.kind * L'.kind
adamc@2 63 | KIncompatible of L'.kind * L'.kind
adamc@2 64
adamc@3 65 exception KUnify' of kunify_error
adamc@3 66
adamc@3 67 fun kunifyError err =
adamc@2 68 case err of
adamc@2 69 KOccursCheckFailed (k1, k2) =>
adamc@3 70 eprefaces "Kind occurs check failed"
adamc@3 71 [("Kind 1", p_kind k1),
adamc@3 72 ("Kind 2", p_kind k2)]
adamc@2 73 | KIncompatible (k1, k2) =>
adamc@3 74 eprefaces "Incompatible kinds"
adamc@3 75 [("Kind 1", p_kind k1),
adamc@3 76 ("Kind 2", p_kind k2)]
adamc@2 77
adamc@3 78 fun unifyKinds' (k1All as (k1, _)) (k2All as (k2, _)) =
adamc@2 79 let
adamc@3 80 fun err f = raise KUnify' (f (k1All, k2All))
adamc@2 81 in
adamc@2 82 case (k1, k2) of
adamc@2 83 (L'.KType, L'.KType) => ()
adamc@82 84 | (L'.KUnit, L'.KUnit) => ()
adamc@82 85
adamc@2 86 | (L'.KArrow (d1, r1), L'.KArrow (d2, r2)) =>
adamc@3 87 (unifyKinds' d1 d2;
adamc@3 88 unifyKinds' r1 r2)
adamc@2 89 | (L'.KName, L'.KName) => ()
adamc@3 90 | (L'.KRecord k1, L'.KRecord k2) => unifyKinds' k1 k2
adamc@207 91 | (L'.KTuple ks1, L'.KTuple ks2) =>
adamc@207 92 ((ListPair.appEq (fn (k1, k2) => unifyKinds' k1 k2) (ks1, ks2))
adamc@207 93 handle ListPair.UnequalLengths => err KIncompatible)
adamc@2 94
adamc@2 95 | (L'.KError, _) => ()
adamc@2 96 | (_, L'.KError) => ()
adamc@2 97
adamc@76 98 | (L'.KUnif (_, _, ref (SOME k1All)), _) => unifyKinds' k1All k2All
adamc@76 99 | (_, L'.KUnif (_, _, ref (SOME k2All))) => unifyKinds' k1All k2All
adamc@2 100
adamc@76 101 | (L'.KUnif (_, _, r1), L'.KUnif (_, _, r2)) =>
adamc@2 102 if r1 = r2 then
adamc@2 103 ()
adamc@2 104 else
adamc@2 105 r1 := SOME k2All
adamc@2 106
adamc@76 107 | (L'.KUnif (_, _, r), _) =>
adamc@2 108 if occursKind r k2All then
adamc@2 109 err KOccursCheckFailed
adamc@2 110 else
adamc@2 111 r := SOME k2All
adamc@76 112 | (_, L'.KUnif (_, _, r)) =>
adamc@2 113 if occursKind r k1All then
adamc@2 114 err KOccursCheckFailed
adamc@2 115 else
adamc@2 116 r := SOME k1All
adamc@2 117
adamc@2 118 | _ => err KIncompatible
adamc@2 119 end
adamc@2 120
adamc@3 121 exception KUnify of L'.kind * L'.kind * kunify_error
adamc@3 122
adamc@3 123 fun unifyKinds k1 k2 =
adamc@3 124 unifyKinds' k1 k2
adamc@3 125 handle KUnify' err => raise KUnify (k1, k2, err)
adamc@3 126
adamc@3 127 datatype con_error =
adamc@3 128 UnboundCon of ErrorMsg.span * string
adamc@157 129 | UnboundDatatype of ErrorMsg.span * string
adamc@34 130 | UnboundStrInCon of ErrorMsg.span * string
adamc@3 131 | WrongKind of L'.con * L'.kind * L'.kind * kunify_error
adamc@67 132 | DuplicateField of ErrorMsg.span * string
adamc@207 133 | ProjBounds of L'.con * int
adamc@207 134 | ProjMismatch of L'.con * L'.kind
adamc@3 135
adamc@5 136 fun conError env err =
adamc@3 137 case err of
adamc@3 138 UnboundCon (loc, s) =>
adamc@3 139 ErrorMsg.errorAt loc ("Unbound constructor variable " ^ s)
adamc@157 140 | UnboundDatatype (loc, s) =>
adamc@157 141 ErrorMsg.errorAt loc ("Unbound datatype " ^ s)
adamc@34 142 | UnboundStrInCon (loc, s) =>
adamc@34 143 ErrorMsg.errorAt loc ("Unbound structure " ^ s)
adamc@3 144 | WrongKind (c, k1, k2, kerr) =>
adamc@3 145 (ErrorMsg.errorAt (#2 c) "Wrong kind";
adamc@5 146 eprefaces' [("Constructor", p_con env c),
adamc@5 147 ("Have kind", p_kind k1),
adamc@5 148 ("Need kind", p_kind k2)];
adamc@3 149 kunifyError kerr)
adamc@67 150 | DuplicateField (loc, s) =>
adamc@67 151 ErrorMsg.errorAt loc ("Duplicate record field " ^ s)
adamc@207 152 | ProjBounds (c, n) =>
adamc@207 153 (ErrorMsg.errorAt (#2 c) "Out of bounds constructor projection";
adamc@207 154 eprefaces' [("Constructor", p_con env c),
adamc@207 155 ("Index", Print.PD.string (Int.toString n))])
adamc@207 156 | ProjMismatch (c, k) =>
adamc@207 157 (ErrorMsg.errorAt (#2 c) "Projection from non-tuple constructor";
adamc@207 158 eprefaces' [("Constructor", p_con env c),
adamc@207 159 ("Kind", p_kind k)])
adamc@3 160
adamc@5 161 fun checkKind env c k1 k2 =
adamc@3 162 unifyKinds k1 k2
adamc@3 163 handle KUnify (k1, k2, err) =>
adamc@5 164 conError env (WrongKind (c, k1, k2, err))
adamc@3 165
adamc@3 166 val dummy = ErrorMsg.dummySpan
adamc@3 167
adamc@3 168 val ktype = (L'.KType, dummy)
adamc@3 169 val kname = (L'.KName, dummy)
adamc@12 170 val ktype_record = (L'.KRecord ktype, dummy)
adamc@3 171
adamc@3 172 val cerror = (L'.CError, dummy)
adamc@3 173 val kerror = (L'.KError, dummy)
adamc@10 174 val eerror = (L'.EError, dummy)
adamc@31 175 val sgnerror = (L'.SgnError, dummy)
adamc@31 176 val strerror = (L'.StrError, dummy)
adamc@3 177
adamc@56 178 val int = ref cerror
adamc@56 179 val float = ref cerror
adamc@56 180 val string = ref cerror
adamc@203 181 val table = ref cerror
adamc@56 182
adamc@3 183 local
adamc@3 184 val count = ref 0
adamc@3 185 in
adamc@3 186
adamc@3 187 fun resetKunif () = count := 0
adamc@3 188
adamc@76 189 fun kunif loc =
adamc@3 190 let
adamc@3 191 val n = !count
adamc@3 192 val s = if n <= 26 then
adamc@3 193 str (chr (ord #"A" + n))
adamc@3 194 else
adamc@3 195 "U" ^ Int.toString (n - 26)
adamc@3 196 in
adamc@3 197 count := n + 1;
adamc@76 198 (L'.KUnif (loc, s, ref NONE), dummy)
adamc@3 199 end
adamc@3 200
adamc@3 201 end
adamc@3 202
adamc@10 203 local
adamc@10 204 val count = ref 0
adamc@10 205 in
adamc@10 206
adamc@10 207 fun resetCunif () = count := 0
adamc@10 208
adamc@76 209 fun cunif (loc, k) =
adamc@10 210 let
adamc@10 211 val n = !count
adamc@10 212 val s = if n <= 26 then
adamc@10 213 str (chr (ord #"A" + n))
adamc@10 214 else
adamc@10 215 "U" ^ Int.toString (n - 26)
adamc@10 216 in
adamc@10 217 count := n + 1;
adamc@76 218 (L'.CUnif (loc, k, s, ref NONE), dummy)
adamc@10 219 end
adamc@10 220
adamc@10 221 end
adamc@10 222
adamc@18 223 fun elabKind (k, loc) =
adamc@18 224 case k of
adamc@18 225 L.KType => (L'.KType, loc)
adamc@18 226 | L.KArrow (k1, k2) => (L'.KArrow (elabKind k1, elabKind k2), loc)
adamc@18 227 | L.KName => (L'.KName, loc)
adamc@18 228 | L.KRecord k => (L'.KRecord (elabKind k), loc)
adamc@82 229 | L.KUnit => (L'.KUnit, loc)
adamc@207 230 | L.KTuple ks => (L'.KTuple (map elabKind ks), loc)
adamc@76 231 | L.KWild => kunif loc
adamc@18 232
adamc@67 233 fun foldKind (dom, ran, loc)=
adamc@67 234 (L'.KArrow ((L'.KArrow ((L'.KName, loc),
adamc@67 235 (L'.KArrow (dom,
adamc@67 236 (L'.KArrow (ran, ran), loc)), loc)), loc),
adamc@67 237 (L'.KArrow (ran,
adamc@67 238 (L'.KArrow ((L'.KRecord dom, loc),
adamc@67 239 ran), loc)), loc)), loc)
adamc@67 240
adamc@207 241 fun hnormKind (kAll as (k, _)) =
adamc@207 242 case k of
adamc@207 243 L'.KUnif (_, _, ref (SOME k)) => hnormKind k
adamc@207 244 | _ => kAll
adamc@207 245
adamc@83 246 fun elabCon (env, denv) (c, loc) =
adamc@3 247 case c of
adamc@3 248 L.CAnnot (c, k) =>
adamc@3 249 let
adamc@3 250 val k' = elabKind k
adamc@83 251 val (c', ck, gs) = elabCon (env, denv) c
adamc@3 252 in
adamc@5 253 checkKind env c' ck k';
adamc@83 254 (c', k', gs)
adamc@3 255 end
adamc@3 256
adamc@3 257 | L.TFun (t1, t2) =>
adamc@3 258 let
adamc@83 259 val (t1', k1, gs1) = elabCon (env, denv) t1
adamc@83 260 val (t2', k2, gs2) = elabCon (env, denv) t2
adamc@3 261 in
adamc@5 262 checkKind env t1' k1 ktype;
adamc@5 263 checkKind env t2' k2 ktype;
adamc@83 264 ((L'.TFun (t1', t2'), loc), ktype, gs1 @ gs2)
adamc@3 265 end
adamc@3 266 | L.TCFun (e, x, k, t) =>
adamc@3 267 let
adamc@3 268 val e' = elabExplicitness e
adamc@3 269 val k' = elabKind k
adamc@3 270 val env' = E.pushCRel env x k'
adamc@83 271 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@3 272 in
adamc@5 273 checkKind env t' tk ktype;
adamc@83 274 ((L'.TCFun (e', x, k', t'), loc), ktype, gs)
adamc@3 275 end
adamc@85 276 | L.TDisjoint (c1, c2, c) =>
adamc@85 277 let
adamc@85 278 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@85 279 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@85 280
adamc@85 281 val ku1 = kunif loc
adamc@85 282 val ku2 = kunif loc
adamc@85 283
adamc@90 284 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@90 285 val (c', k, gs4) = elabCon (env, denv') c
adamc@85 286 in
adamc@85 287 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@85 288 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@85 289
adamc@90 290 ((L'.TDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
adamc@85 291 end
adamc@3 292 | L.TRecord c =>
adamc@3 293 let
adamc@83 294 val (c', ck, gs) = elabCon (env, denv) c
adamc@3 295 val k = (L'.KRecord ktype, loc)
adamc@3 296 in
adamc@5 297 checkKind env c' ck k;
adamc@83 298 ((L'.TRecord c', loc), ktype, gs)
adamc@3 299 end
adamc@3 300
adamc@34 301 | L.CVar ([], s) =>
adamc@3 302 (case E.lookupC env s of
adamc@9 303 E.NotBound =>
adamc@5 304 (conError env (UnboundCon (loc, s));
adamc@83 305 (cerror, kerror, []))
adamc@9 306 | E.Rel (n, k) =>
adamc@83 307 ((L'.CRel n, loc), k, [])
adamc@9 308 | E.Named (n, k) =>
adamc@83 309 ((L'.CNamed n, loc), k, []))
adamc@34 310 | L.CVar (m1 :: ms, s) =>
adamc@34 311 (case E.lookupStr env m1 of
adamc@42 312 NONE => (conError env (UnboundStrInCon (loc, m1));
adamc@83 313 (cerror, kerror, []))
adamc@34 314 | SOME (n, sgn) =>
adamc@34 315 let
adamc@34 316 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@34 317 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@34 318 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@34 319 (strerror, sgnerror))
adamc@34 320 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@34 321 ((L'.StrVar n, loc), sgn) ms
adamc@34 322
adamc@34 323 val k = case E.projectCon env {sgn = sgn, str = str, field = s} of
adamc@34 324 NONE => (conError env (UnboundCon (loc, s));
adamc@34 325 kerror)
adamc@34 326 | SOME (k, _) => k
adamc@34 327 in
adamc@83 328 ((L'.CModProj (n, ms, s), loc), k, [])
adamc@34 329 end)
adamc@34 330
adamc@3 331 | L.CApp (c1, c2) =>
adamc@3 332 let
adamc@83 333 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@83 334 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@76 335 val dom = kunif loc
adamc@76 336 val ran = kunif loc
adamc@3 337 in
adamc@5 338 checkKind env c1' k1 (L'.KArrow (dom, ran), loc);
adamc@5 339 checkKind env c2' k2 dom;
adamc@83 340 ((L'.CApp (c1', c2'), loc), ran, gs1 @ gs2)
adamc@3 341 end
adamc@67 342 | L.CAbs (x, ko, t) =>
adamc@3 343 let
adamc@67 344 val k' = case ko of
adamc@76 345 NONE => kunif loc
adamc@67 346 | SOME k => elabKind k
adamc@3 347 val env' = E.pushCRel env x k'
adamc@83 348 val (t', tk, gs) = elabCon (env', D.enter denv) t
adamc@3 349 in
adamc@8 350 ((L'.CAbs (x, k', t'), loc),
adamc@83 351 (L'.KArrow (k', tk), loc),
adamc@83 352 gs)
adamc@3 353 end
adamc@3 354
adamc@84 355 | L.CDisjoint (c1, c2, c) =>
adamc@84 356 let
adamc@84 357 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@84 358 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@84 359
adamc@84 360 val ku1 = kunif loc
adamc@84 361 val ku2 = kunif loc
adamc@84 362
adamc@90 363 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@90 364 val (c', k, gs4) = elabCon (env, denv') c
adamc@84 365 in
adamc@84 366 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@84 367 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@84 368
adamc@90 369 ((L'.CDisjoint (c1', c2', c'), loc), k, gs1 @ gs2 @ gs3 @ gs4)
adamc@84 370 end
adamc@84 371
adamc@3 372 | L.CName s =>
adamc@83 373 ((L'.CName s, loc), kname, [])
adamc@3 374
adamc@3 375 | L.CRecord xcs =>
adamc@3 376 let
adamc@76 377 val k = kunif loc
adamc@3 378
adamc@83 379 val (xcs', gs) = ListUtil.foldlMap (fn ((x, c), gs) =>
adamc@83 380 let
adamc@83 381 val (x', xk, gs1) = elabCon (env, denv) x
adamc@83 382 val (c', ck, gs2) = elabCon (env, denv) c
adamc@83 383 in
adamc@83 384 checkKind env x' xk kname;
adamc@83 385 checkKind env c' ck k;
adamc@83 386 ((x', c'), gs1 @ gs2 @ gs)
adamc@83 387 end) [] xcs
adamc@67 388
adamc@67 389 val rc = (L'.CRecord (k, xcs'), loc)
adamc@67 390 (* Add duplicate field checking later. *)
adamc@83 391
adamc@83 392 fun prove (xcs, ds) =
adamc@83 393 case xcs of
adamc@83 394 [] => ds
adamc@83 395 | xc :: rest =>
adamc@83 396 let
adamc@83 397 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@83 398 val ds = foldl (fn (xc', ds) =>
adamc@83 399 let
adamc@83 400 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@83 401 in
adamc@90 402 D.prove env denv (r1, r2, loc) @ ds
adamc@83 403 end)
adamc@83 404 ds rest
adamc@83 405 in
adamc@83 406 prove (rest, ds)
adamc@83 407 end
adamc@3 408 in
adamc@83 409 (rc, (L'.KRecord k, loc), prove (xcs', gs))
adamc@3 410 end
adamc@3 411 | L.CConcat (c1, c2) =>
adamc@3 412 let
adamc@83 413 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@83 414 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@76 415 val ku = kunif loc
adamc@3 416 val k = (L'.KRecord ku, loc)
adamc@3 417 in
adamc@5 418 checkKind env c1' k1 k;
adamc@5 419 checkKind env c2' k2 k;
adamc@83 420 ((L'.CConcat (c1', c2'), loc), k,
adamc@90 421 D.prove env denv (c1', c2', loc) @ gs1 @ gs2)
adamc@3 422 end
adamc@67 423 | L.CFold =>
adamc@67 424 let
adamc@76 425 val dom = kunif loc
adamc@76 426 val ran = kunif loc
adamc@67 427 in
adamc@67 428 ((L'.CFold (dom, ran), loc),
adamc@83 429 foldKind (dom, ran, loc),
adamc@83 430 [])
adamc@67 431 end
adamc@3 432
adamc@83 433 | L.CUnit => ((L'.CUnit, loc), (L'.KUnit, loc), [])
adamc@82 434
adamc@207 435 | L.CTuple cs =>
adamc@207 436 let
adamc@207 437 val (cs', ks, gs) = foldl (fn (c, (cs', ks, gs)) =>
adamc@207 438 let
adamc@207 439 val (c', k, gs') = elabCon (env, denv) c
adamc@207 440 in
adamc@207 441 (c' :: cs', k :: ks, gs' @ gs)
adamc@207 442 end) ([], [], []) cs
adamc@207 443 in
adamc@207 444 ((L'.CTuple (rev cs'), loc), (L'.KTuple (rev ks), loc), gs)
adamc@207 445 end
adamc@207 446 | L.CProj (c, n) =>
adamc@207 447 let
adamc@207 448 val (c', k, gs) = elabCon (env, denv) c
adamc@207 449 in
adamc@207 450 case hnormKind k of
adamc@207 451 (L'.KTuple ks, _) =>
adamc@207 452 if n <= 0 orelse n > length ks then
adamc@207 453 (conError env (ProjBounds (c', n));
adamc@207 454 (cerror, kerror, []))
adamc@207 455 else
adamc@207 456 ((L'.CProj (c', n), loc), List.nth (ks, n - 1), gs)
adamc@207 457 | k => (conError env (ProjMismatch (c', k));
adamc@207 458 (cerror, kerror, []))
adamc@207 459 end
adamc@207 460
adamc@18 461 | L.CWild k =>
adamc@18 462 let
adamc@18 463 val k' = elabKind k
adamc@18 464 in
adamc@83 465 (cunif (loc, k'), k', [])
adamc@18 466 end
adamc@18 467
adamc@6 468 fun kunifsRemain k =
adamc@6 469 case k of
adamc@76 470 L'.KUnif (_, _, ref NONE) => true
adamc@6 471 | _ => false
adamc@10 472 fun cunifsRemain c =
adamc@10 473 case c of
adamc@76 474 L'.CUnif (loc, _, _, ref NONE) => SOME loc
adamc@76 475 | _ => NONE
adamc@6 476
adamc@76 477 val kunifsInDecl = U.Decl.exists {kind = kunifsRemain,
adamc@76 478 con = fn _ => false,
adamc@76 479 exp = fn _ => false,
adamc@76 480 sgn_item = fn _ => false,
adamc@76 481 sgn = fn _ => false,
adamc@76 482 str = fn _ => false,
adamc@76 483 decl = fn _ => false}
adamc@10 484
adamc@76 485 val cunifsInDecl = U.Decl.search {kind = fn _ => NONE,
adamc@76 486 con = cunifsRemain,
adamc@76 487 exp = fn _ => NONE,
adamc@76 488 sgn_item = fn _ => NONE,
adamc@76 489 sgn = fn _ => NONE,
adamc@76 490 str = fn _ => NONE,
adamc@76 491 decl = fn _ => NONE}
adamc@10 492
adamc@10 493 fun occursCon r =
adamc@10 494 U.Con.exists {kind = fn _ => false,
adamc@76 495 con = fn L'.CUnif (_, _, _, r') => r = r'
adamc@10 496 | _ => false}
adamc@10 497
adamc@10 498 datatype cunify_error =
adamc@10 499 CKind of L'.kind * L'.kind * kunify_error
adamc@10 500 | COccursCheckFailed of L'.con * L'.con
adamc@10 501 | CIncompatible of L'.con * L'.con
adamc@10 502 | CExplicitness of L'.con * L'.con
adamc@141 503 | CKindof of L'.kind * L'.con
adamc@153 504 | CRecordFailure of PD.pp_desc * PD.pp_desc
adamc@10 505
adamc@10 506 exception CUnify' of cunify_error
adamc@10 507
adamc@10 508 fun cunifyError env err =
adamc@10 509 case err of
adamc@10 510 CKind (k1, k2, kerr) =>
adamc@10 511 (eprefaces "Kind unification failure"
adamc@10 512 [("Kind 1", p_kind k1),
adamc@10 513 ("Kind 2", p_kind k2)];
adamc@10 514 kunifyError kerr)
adamc@10 515 | COccursCheckFailed (c1, c2) =>
adamc@10 516 eprefaces "Constructor occurs check failed"
adamc@10 517 [("Con 1", p_con env c1),
adamc@10 518 ("Con 2", p_con env c2)]
adamc@10 519 | CIncompatible (c1, c2) =>
adamc@10 520 eprefaces "Incompatible constructors"
adamc@10 521 [("Con 1", p_con env c1),
adamc@10 522 ("Con 2", p_con env c2)]
adamc@10 523 | CExplicitness (c1, c2) =>
adamc@10 524 eprefaces "Differing constructor function explicitness"
adamc@10 525 [("Con 1", p_con env c1),
adamc@10 526 ("Con 2", p_con env c2)]
adamc@141 527 | CKindof (k, c) =>
adamc@147 528 eprefaces "Unexpected kind for kindof calculation"
adamc@141 529 [("Kind", p_kind k),
adamc@141 530 ("Con", p_con env c)]
adamc@153 531 | CRecordFailure (s1, s2) =>
adamc@153 532 eprefaces "Can't unify record constructors"
adamc@153 533 [("Summary 1", s1),
adamc@153 534 ("Summary 2", s2)]
adamc@10 535
adamc@13 536 exception SynUnif = E.SynUnif
adamc@12 537
adamc@81 538 open ElabOps
adamc@43 539
adamc@12 540 type record_summary = {
adamc@12 541 fields : (L'.con * L'.con) list,
adamc@12 542 unifs : (L'.con * L'.con option ref) list,
adamc@12 543 others : L'.con list
adamc@12 544 }
adamc@12 545
adamc@12 546 fun summaryToCon {fields, unifs, others} =
adamc@12 547 let
adamc@12 548 val c = (L'.CRecord (ktype, []), dummy)
adamc@12 549 val c = List.foldr (fn (c', c) => (L'.CConcat (c', c), dummy)) c others
adamc@12 550 val c = List.foldr (fn ((c', _), c) => (L'.CConcat (c', c), dummy)) c unifs
adamc@12 551 in
adamc@12 552 (L'.CConcat ((L'.CRecord (ktype, fields), dummy), c), dummy)
adamc@12 553 end
adamc@12 554
adamc@12 555 fun p_summary env s = p_con env (summaryToCon s)
adamc@12 556
adamc@12 557 exception CUnify of L'.con * L'.con * cunify_error
adamc@12 558
adamc@12 559 fun kindof env (c, loc) =
adamc@12 560 case c of
adamc@12 561 L'.TFun _ => ktype
adamc@12 562 | L'.TCFun _ => ktype
adamc@85 563 | L'.TDisjoint _ => ktype
adamc@12 564 | L'.TRecord _ => ktype
adamc@12 565
adamc@12 566 | L'.CRel xn => #2 (E.lookupCRel env xn)
adamc@12 567 | L'.CNamed xn => #2 (E.lookupCNamed env xn)
adamc@34 568 | L'.CModProj (n, ms, x) =>
adamc@34 569 let
adamc@34 570 val (_, sgn) = E.lookupStrNamed env n
adamc@34 571 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@34 572 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@34 573 NONE => raise Fail "kindof: Unknown substructure"
adamc@34 574 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@34 575 ((L'.StrVar n, loc), sgn) ms
adamc@34 576 in
adamc@34 577 case E.projectCon env {sgn = sgn, str = str, field = x} of
adamc@34 578 NONE => raise Fail "kindof: Unknown con in structure"
adamc@34 579 | SOME (k, _) => k
adamc@34 580 end
adamc@34 581
adamc@12 582 | L'.CApp (c, _) =>
adamc@141 583 (case hnormKind (kindof env c) of
adamc@141 584 (L'.KArrow (_, k), _) => k
adamc@141 585 | (L'.KError, _) => kerror
adamc@141 586 | k => raise CUnify' (CKindof (k, c)))
adamc@12 587 | L'.CAbs (x, k, c) => (L'.KArrow (k, kindof (E.pushCRel env x k) c), loc)
adamc@84 588 | L'.CDisjoint (_, _, c) => kindof env c
adamc@12 589
adamc@12 590 | L'.CName _ => kname
adamc@12 591
adamc@12 592 | L'.CRecord (k, _) => (L'.KRecord k, loc)
adamc@12 593 | L'.CConcat (c, _) => kindof env c
adamc@67 594 | L'.CFold (dom, ran) => foldKind (dom, ran, loc)
adamc@12 595
adamc@82 596 | L'.CUnit => (L'.KUnit, loc)
adamc@82 597
adamc@207 598 | L'.CTuple cs => (L'.KTuple (map (kindof env) cs), loc)
adamc@207 599 | L'.CProj (c, n) =>
adamc@207 600 (case hnormKind (kindof env c) of
adamc@207 601 (L'.KTuple ks, _) => List.nth (ks, n - 1)
adamc@207 602 | k => raise CUnify' (CKindof (k, c)))
adamc@207 603
adamc@12 604 | L'.CError => kerror
adamc@76 605 | L'.CUnif (_, k, _, _) => k
adamc@12 606
adamc@90 607 val hnormCon = D.hnormCon
adamc@86 608
adamc@205 609 datatype con_summary =
adamc@205 610 Nil
adamc@205 611 | Cons
adamc@205 612 | Unknown
adamc@205 613
adamc@205 614 fun compatible cs =
adamc@205 615 case cs of
adamc@205 616 (Unknown, _) => false
adamc@205 617 | (_, Unknown) => false
adamc@205 618 | (s1, s2) => s1 = s2
adamc@205 619
adamc@205 620 fun summarizeCon (env, denv) c =
adamc@205 621 let
adamc@205 622 val (c, gs) = hnormCon (env, denv) c
adamc@205 623 in
adamc@205 624 case #1 c of
adamc@205 625 L'.CRecord (_, []) => (Nil, gs)
adamc@205 626 | L'.CRecord (_, _ :: _) => (Cons, gs)
adamc@205 627 | L'.CConcat ((L'.CRecord (_, _ :: _), _), _) => (Cons, gs)
adamc@205 628 | L'.CDisjoint (_, _, c) =>
adamc@205 629 let
adamc@205 630 val (s, gs') = summarizeCon (env, denv) c
adamc@205 631 in
adamc@205 632 (s, gs @ gs')
adamc@205 633 end
adamc@205 634 | _ => (Unknown, gs)
adamc@205 635 end
adamc@205 636
adamc@205 637 fun p_con_summary s =
adamc@205 638 Print.PD.string (case s of
adamc@205 639 Nil => "Nil"
adamc@205 640 | Cons => "Cons"
adamc@205 641 | Unknown => "Unknown")
adamc@205 642
adamc@86 643 fun unifyRecordCons (env, denv) (c1, c2) =
adamc@12 644 let
adamc@92 645 fun rkindof c =
adamc@147 646 case hnormKind (kindof env c) of
adamc@92 647 (L'.KRecord k, _) => k
adamc@141 648 | (L'.KError, _) => kerror
adamc@141 649 | k => raise CUnify' (CKindof (k, c))
adamc@92 650
adamc@92 651 val k1 = rkindof c1
adamc@92 652 val k2 = rkindof c2
adamc@86 653
adamc@86 654 val (r1, gs1) = recordSummary (env, denv) c1
adamc@86 655 val (r2, gs2) = recordSummary (env, denv) c2
adamc@12 656 in
adamc@12 657 unifyKinds k1 k2;
adamc@86 658 unifySummaries (env, denv) (k1, r1, r2);
adamc@86 659 gs1 @ gs2
adamc@12 660 end
adamc@12 661
adamc@86 662 and recordSummary (env, denv) c =
adamc@86 663 let
adamc@86 664 val (c, gs) = hnormCon (env, denv) c
adamc@12 665
adamc@86 666 val (sum, gs') =
adamc@86 667 case c of
adamc@86 668 (L'.CRecord (_, xcs), _) => ({fields = xcs, unifs = [], others = []}, [])
adamc@86 669 | (L'.CConcat (c1, c2), _) =>
adamc@86 670 let
adamc@86 671 val (s1, gs1) = recordSummary (env, denv) c1
adamc@86 672 val (s2, gs2) = recordSummary (env, denv) c2
adamc@86 673 in
adamc@86 674 ({fields = #fields s1 @ #fields s2,
adamc@86 675 unifs = #unifs s1 @ #unifs s2,
adamc@86 676 others = #others s1 @ #others s2},
adamc@86 677 gs1 @ gs2)
adamc@86 678 end
adamc@86 679 | (L'.CUnif (_, _, _, ref (SOME c)), _) => recordSummary (env, denv) c
adamc@86 680 | c' as (L'.CUnif (_, _, _, r), _) => ({fields = [], unifs = [(c', r)], others = []}, [])
adamc@86 681 | c' => ({fields = [], unifs = [], others = [c']}, [])
adamc@86 682 in
adamc@86 683 (sum, gs @ gs')
adamc@86 684 end
adamc@86 685
adamc@86 686 and consEq (env, denv) (c1, c2) =
adamc@209 687 let
adamc@209 688 val gs = unifyCons (env, denv) c1 c2
adamc@209 689 in
adamc@209 690 List.all (fn (loc, env, denv, c1, c2) =>
adamc@209 691 case D.prove env denv (c1, c2, loc) of
adamc@209 692 [] => true
adamc@209 693 | _ => false) gs
adamc@209 694 end
adamc@12 695 handle CUnify _ => false
adamc@12 696
adamc@80 697 and consNeq env (c1, c2) =
adamc@86 698 case (#1 (ElabOps.hnormCon env c1), #1 (ElabOps.hnormCon env c2)) of
adamc@80 699 (L'.CName x1, L'.CName x2) => x1 <> x2
adamc@80 700 | _ => false
adamc@80 701
adamc@86 702 and unifySummaries (env, denv) (k, s1 : record_summary, s2 : record_summary) =
adamc@12 703 let
adamc@14 704 (*val () = eprefaces "Summaries" [("#1", p_summary env s1),
adamc@14 705 ("#2", p_summary env s2)]*)
adamc@12 706
adamc@12 707 fun eatMatching p (ls1, ls2) =
adamc@12 708 let
adamc@12 709 fun em (ls1, ls2, passed1) =
adamc@12 710 case ls1 of
adamc@12 711 [] => (rev passed1, ls2)
adamc@12 712 | h1 :: t1 =>
adamc@12 713 let
adamc@12 714 fun search (ls2', passed2) =
adamc@12 715 case ls2' of
adamc@12 716 [] => em (t1, ls2, h1 :: passed1)
adamc@12 717 | h2 :: t2 =>
adamc@12 718 if p (h1, h2) then
adamc@12 719 em (t1, List.revAppend (passed2, t2), passed1)
adamc@12 720 else
adamc@12 721 search (t2, h2 :: passed2)
adamc@12 722 in
adamc@12 723 search (ls2, [])
adamc@12 724 end
adamc@12 725 in
adamc@12 726 em (ls1, ls2, [])
adamc@12 727 end
adamc@12 728
adamc@12 729 val (fs1, fs2) = eatMatching (fn ((x1, c1), (x2, c2)) =>
adamc@80 730 not (consNeq env (x1, x2))
adamc@86 731 andalso consEq (env, denv) (c1, c2)
adamc@86 732 andalso consEq (env, denv) (x1, x2))
adamc@79 733 (#fields s1, #fields s2)
adamc@14 734 (*val () = eprefaces "Summaries2" [("#1", p_summary env {fields = fs1, unifs = #unifs s1, others = #others s1}),
adamc@14 735 ("#2", p_summary env {fields = fs2, unifs = #unifs s2, others = #others s2})]*)
adamc@12 736 val (unifs1, unifs2) = eatMatching (fn ((_, r1), (_, r2)) => r1 = r2) (#unifs s1, #unifs s2)
adamc@86 737 val (others1, others2) = eatMatching (consEq (env, denv)) (#others s1, #others s2)
adamc@12 738
adamc@12 739 fun unifFields (fs, others, unifs) =
adamc@12 740 case (fs, others, unifs) of
adamc@12 741 ([], [], _) => ([], [], unifs)
adamc@12 742 | (_, _, []) => (fs, others, [])
adamc@12 743 | (_, _, (_, r) :: rest) =>
adamc@12 744 let
adamc@12 745 val r' = ref NONE
adamc@141 746 val kr = (L'.KRecord k, dummy)
adamc@141 747 val cr' = (L'.CUnif (dummy, kr, "recd", r'), dummy)
adamc@12 748
adamc@12 749 val prefix = case (fs, others) of
adamc@12 750 ([], other :: others) =>
adamc@12 751 List.foldl (fn (other, c) =>
adamc@12 752 (L'.CConcat (c, other), dummy))
adamc@12 753 other others
adamc@12 754 | (fs, []) =>
adamc@12 755 (L'.CRecord (k, fs), dummy)
adamc@12 756 | (fs, others) =>
adamc@12 757 List.foldl (fn (other, c) =>
adamc@12 758 (L'.CConcat (c, other), dummy))
adamc@12 759 (L'.CRecord (k, fs), dummy) others
adamc@12 760 in
adamc@12 761 r := SOME (L'.CConcat (prefix, cr'), dummy);
adamc@12 762 ([], [], (cr', r') :: rest)
adamc@12 763 end
adamc@12 764
adamc@12 765 val (fs1, others1, unifs2) = unifFields (fs1, others1, unifs2)
adamc@12 766 val (fs2, others2, unifs1) = unifFields (fs2, others2, unifs1)
adamc@12 767
adamc@86 768 val clear = case (fs1, others1, fs2, others2) of
adamc@86 769 ([], [], [], []) => true
adamc@12 770 | _ => false
adamc@12 771 val empty = (L'.CRecord (k, []), dummy)
adamc@12 772 fun pairOffUnifs (unifs1, unifs2) =
adamc@12 773 case (unifs1, unifs2) of
adamc@12 774 ([], _) =>
adamc@86 775 if clear then
adamc@12 776 List.app (fn (_, r) => r := SOME empty) unifs2
adamc@12 777 else
adamc@153 778 raise CUnify' (CRecordFailure (p_summary env s1, p_summary env s2))
adamc@12 779 | (_, []) =>
adamc@86 780 if clear then
adamc@12 781 List.app (fn (_, r) => r := SOME empty) unifs1
adamc@12 782 else
adamc@153 783 raise CUnify' (CRecordFailure (p_summary env s1, p_summary env s2))
adamc@12 784 | ((c1, _) :: rest1, (_, r2) :: rest2) =>
adamc@12 785 (r2 := SOME c1;
adamc@12 786 pairOffUnifs (rest1, rest2))
adamc@12 787 in
adamc@12 788 pairOffUnifs (unifs1, unifs2)
adamc@12 789 end
adamc@12 790
adamc@86 791 and unifyCons' (env, denv) c1 c2 =
adamc@86 792 let
adamc@86 793 val (c1, gs1) = hnormCon (env, denv) c1
adamc@86 794 val (c2, gs2) = hnormCon (env, denv) c2
adamc@86 795 in
adamc@205 796 let
adamc@205 797 val gs3 = unifyCons'' (env, denv) c1 c2
adamc@205 798 in
adamc@205 799 gs1 @ gs2 @ gs3
adamc@205 800 end
adamc@205 801 handle ex =>
adamc@205 802 let
adamc@205 803 val loc = #2 c1
adamc@205 804
adamc@205 805 fun unfold (dom, f, i, r, c) =
adamc@205 806 let
adamc@205 807 val nm = cunif (loc, (L'.KName, loc))
adamc@205 808 val v = cunif (loc, dom)
adamc@205 809 val rest = cunif (loc, (L'.KRecord dom, loc))
adamc@205 810
adamc@205 811 val (iS, gs3) = summarizeCon (env, denv) i
adamc@205 812
adamc@205 813 val app = (L'.CApp (f, nm), loc)
adamc@205 814 val app = (L'.CApp (app, v), loc)
adamc@205 815 val app = (L'.CApp (app, rest), loc)
adamc@205 816 val (appS, gs4) = summarizeCon (env, denv) app
adamc@205 817
adamc@205 818 val (cS, gs5) = summarizeCon (env, denv) c
adamc@205 819 in
adamc@205 820 (*prefaces "Summaries" [("iS", p_con_summary iS),
adamc@205 821 ("appS", p_con_summary appS),
adamc@205 822 ("cS", p_con_summary cS)];*)
adamc@205 823
adamc@205 824 if compatible (iS, appS) then
adamc@205 825 raise ex
adamc@205 826 else if compatible (cS, iS) then
adamc@205 827 let
adamc@205 828 (*val () = prefaces "Same?" [("i", p_con env i),
adamc@205 829 ("c", p_con env c)]*)
adamc@205 830 val gs6 = unifyCons (env, denv) i c
adamc@205 831 (*val () = TextIO.print "Yes!\n"*)
adamc@205 832
adamc@205 833 val gs7 = unifyCons (env, denv) r (L'.CRecord (dom, []), loc)
adamc@205 834 in
adamc@205 835 gs1 @ gs2 @ gs3 @ gs4 @ gs5 @ gs6 @ gs7
adamc@205 836 end
adamc@205 837 else if compatible (cS, appS) then
adamc@205 838 let
adamc@205 839 (*val () = prefaces "Same?" [("app", p_con env app),
adamc@205 840 ("c", p_con env c),
adamc@205 841 ("app'", p_con env (#1 (hnormCon (env, denv) app)))]*)
adamc@205 842 val gs6 = unifyCons (env, denv) app c
adamc@205 843 (*val () = TextIO.print "Yes!\n"*)
adamc@205 844
adamc@205 845 val singleton = (L'.CRecord (dom, [(nm, v)]), loc)
adamc@205 846 val concat = (L'.CConcat (singleton, rest), loc)
adamc@205 847 val gs7 = unifyCons (env, denv) r concat
adamc@205 848 in
adamc@206 849 gs1 @ gs2 @ gs3 @ gs4 @ gs5 @ gs6 @ gs7
adamc@205 850 end
adamc@205 851 else
adamc@205 852 raise ex
adamc@205 853 end
adamc@205 854 handle _ => raise ex
adamc@205 855 in
adamc@205 856 case (#1 c1, #1 c2) of
adamc@205 857 (L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, _), _), f), _), i), _), r), _) =>
adamc@205 858 unfold (dom, f, i, r, c2)
adamc@205 859 | (_, L'.CApp ((L'.CApp ((L'.CApp ((L'.CFold (dom, _), _), f), _), i), _), r)) =>
adamc@205 860 unfold (dom, f, i, r, c1)
adamc@205 861 | _ => raise ex
adamc@205 862 end
adamc@86 863 end
adamc@11 864
adamc@205 865 and unifyCons'' (env, denv) (c1All as (c1, loc)) (c2All as (c2, _)) =
adamc@10 866 let
adamc@210 867 fun err f = raise CUnify' (f (c1All, c2All))
adamc@12 868
adamc@86 869 fun isRecord () = unifyRecordCons (env, denv) (c1All, c2All)
adamc@10 870 in
adamc@92 871 (*eprefaces "unifyCons''" [("c1All", p_con env c1All),
adamc@92 872 ("c2All", p_con env c2All)];*)
adamc@92 873
adamc@10 874 case (c1, c2) of
adamc@88 875 (L'.CUnit, L'.CUnit) => []
adamc@88 876
adamc@88 877 | (L'.TFun (d1, r1), L'.TFun (d2, r2)) =>
adamc@86 878 unifyCons' (env, denv) d1 d2
adamc@86 879 @ unifyCons' (env, denv) r1 r2
adamc@10 880 | (L'.TCFun (expl1, x1, d1, r1), L'.TCFun (expl2, _, d2, r2)) =>
adamc@10 881 if expl1 <> expl2 then
adamc@10 882 err CExplicitness
adamc@10 883 else
adamc@10 884 (unifyKinds d1 d2;
adamc@86 885 unifyCons' (E.pushCRel env x1 d1, D.enter denv) r1 r2)
adamc@86 886 | (L'.TRecord r1, L'.TRecord r2) => unifyCons' (env, denv) r1 r2
adamc@10 887
adamc@10 888 | (L'.CRel n1, L'.CRel n2) =>
adamc@10 889 if n1 = n2 then
adamc@86 890 []
adamc@10 891 else
adamc@10 892 err CIncompatible
adamc@10 893 | (L'.CNamed n1, L'.CNamed n2) =>
adamc@10 894 if n1 = n2 then
adamc@86 895 []
adamc@10 896 else
adamc@10 897 err CIncompatible
adamc@10 898
adamc@10 899 | (L'.CApp (d1, r1), L'.CApp (d2, r2)) =>
adamc@86 900 (unifyCons' (env, denv) d1 d2;
adamc@86 901 unifyCons' (env, denv) r1 r2)
adamc@10 902 | (L'.CAbs (x1, k1, c1), L'.CAbs (_, k2, c2)) =>
adamc@10 903 (unifyKinds k1 k2;
adamc@86 904 unifyCons' (E.pushCRel env x1 k1, D.enter denv) c1 c2)
adamc@10 905
adamc@10 906 | (L'.CName n1, L'.CName n2) =>
adamc@10 907 if n1 = n2 then
adamc@86 908 []
adamc@10 909 else
adamc@10 910 err CIncompatible
adamc@10 911
adamc@34 912 | (L'.CModProj (n1, ms1, x1), L'.CModProj (n2, ms2, x2)) =>
adamc@34 913 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then
adamc@86 914 []
adamc@34 915 else
adamc@34 916 err CIncompatible
adamc@34 917
adamc@207 918 | (L'.CTuple cs1, L'.CTuple cs2) =>
adamc@207 919 ((ListPair.foldlEq (fn (c1, c2, gs) =>
adamc@207 920 let
adamc@207 921 val gs' = unifyCons' (env, denv) c1 c2
adamc@207 922 in
adamc@207 923 gs' @ gs
adamc@207 924 end) [] (cs1, cs2))
adamc@207 925 handle ListPair.UnequalLengths => err CIncompatible)
adamc@207 926 | (L'.CProj (c1, n1), L'.CProj (c2, n2)) =>
adamc@207 927 if n1 = n2 then
adamc@207 928 unifyCons' (env, denv) c1 c2
adamc@207 929 else
adamc@207 930 err CIncompatible
adamc@207 931
adamc@86 932 | (L'.CError, _) => []
adamc@86 933 | (_, L'.CError) => []
adamc@10 934
adamc@92 935 | (L'.CRecord _, _) => isRecord ()
adamc@92 936 | (_, L'.CRecord _) => isRecord ()
adamc@92 937 | (L'.CConcat _, _) => isRecord ()
adamc@92 938 | (_, L'.CConcat _) => isRecord ()
adamc@10 939
adamc@76 940 | (L'.CUnif (_, k1, _, r1), L'.CUnif (_, k2, _, r2)) =>
adamc@10 941 if r1 = r2 then
adamc@86 942 []
adamc@10 943 else
adamc@10 944 (unifyKinds k1 k2;
adamc@86 945 r1 := SOME c2All;
adamc@86 946 [])
adamc@10 947
adamc@76 948 | (L'.CUnif (_, _, _, r), _) =>
adamc@10 949 if occursCon r c2All then
adamc@10 950 err COccursCheckFailed
adamc@10 951 else
adamc@86 952 (r := SOME c2All;
adamc@86 953 [])
adamc@76 954 | (_, L'.CUnif (_, _, _, r)) =>
adamc@10 955 if occursCon r c1All then
adamc@10 956 err COccursCheckFailed
adamc@10 957 else
adamc@86 958 (r := SOME c1All;
adamc@86 959 [])
adamc@10 960
adamc@71 961 | (L'.CFold (dom1, ran1), L'.CFold (dom2, ran2)) =>
adamc@71 962 (unifyKinds dom1 dom2;
adamc@86 963 unifyKinds ran1 ran2;
adamc@86 964 [])
adamc@71 965
adamc@10 966 | _ => err CIncompatible
adamc@10 967 end
adamc@10 968
adamc@86 969 and unifyCons (env, denv) c1 c2 =
adamc@86 970 unifyCons' (env, denv) c1 c2
adamc@10 971 handle CUnify' err => raise CUnify (c1, c2, err)
adamc@10 972 | KUnify args => raise CUnify (c1, c2, CKind args)
adamc@10 973
adamc@10 974 datatype exp_error =
adamc@10 975 UnboundExp of ErrorMsg.span * string
adamc@34 976 | UnboundStrInExp of ErrorMsg.span * string
adamc@10 977 | Unify of L'.exp * L'.con * L'.con * cunify_error
adamc@11 978 | Unif of string * L'.con
adamc@11 979 | WrongForm of string * L'.exp * L'.con
adamc@92 980 | IncompatibleCons of L'.con * L'.con
adamc@171 981 | DuplicatePatternVariable of ErrorMsg.span * string
adamc@171 982 | PatUnify of L'.pat * L'.con * L'.con * cunify_error
adamc@174 983 | UnboundConstructor of ErrorMsg.span * string list * string
adamc@171 984 | PatHasArg of ErrorMsg.span
adamc@171 985 | PatHasNoArg of ErrorMsg.span
adamc@172 986 | Inexhaustive of ErrorMsg.span
adamc@175 987 | DuplicatePatField of ErrorMsg.span * string
adamc@211 988 | Unresolvable of ErrorMsg.span * L'.con
adamc@211 989 | OutOfContext of ErrorMsg.span
adamc@10 990
adamc@10 991 fun expError env err =
adamc@10 992 case err of
adamc@10 993 UnboundExp (loc, s) =>
adamc@10 994 ErrorMsg.errorAt loc ("Unbound expression variable " ^ s)
adamc@34 995 | UnboundStrInExp (loc, s) =>
adamc@34 996 ErrorMsg.errorAt loc ("Unbound structure " ^ s)
adamc@10 997 | Unify (e, c1, c2, uerr) =>
adamc@10 998 (ErrorMsg.errorAt (#2 e) "Unification failure";
adamc@10 999 eprefaces' [("Expression", p_exp env e),
adamc@10 1000 ("Have con", p_con env c1),
adamc@10 1001 ("Need con", p_con env c2)];
adamc@10 1002 cunifyError env uerr)
adamc@11 1003 | Unif (action, c) =>
adamc@11 1004 (ErrorMsg.errorAt (#2 c) ("Unification variable blocks " ^ action);
adamc@11 1005 eprefaces' [("Con", p_con env c)])
adamc@11 1006 | WrongForm (variety, e, t) =>
adamc@11 1007 (ErrorMsg.errorAt (#2 e) ("Expression is not a " ^ variety);
adamc@11 1008 eprefaces' [("Expression", p_exp env e),
adamc@11 1009 ("Type", p_con env t)])
adamc@92 1010 | IncompatibleCons (c1, c2) =>
adamc@92 1011 (ErrorMsg.errorAt (#2 c1) "Incompatible constructors";
adamc@92 1012 eprefaces' [("Con 1", p_con env c1),
adamc@92 1013 ("Con 2", p_con env c2)])
adamc@171 1014 | DuplicatePatternVariable (loc, s) =>
adamc@171 1015 ErrorMsg.errorAt loc ("Duplicate pattern variable " ^ s)
adamc@171 1016 | PatUnify (p, c1, c2, uerr) =>
adamc@171 1017 (ErrorMsg.errorAt (#2 p) "Unification failure for pattern";
adamc@171 1018 eprefaces' [("Pattern", p_pat env p),
adamc@171 1019 ("Have con", p_con env c1),
adamc@171 1020 ("Need con", p_con env c2)];
adamc@171 1021 cunifyError env uerr)
adamc@174 1022 | UnboundConstructor (loc, ms, s) =>
adamc@174 1023 ErrorMsg.errorAt loc ("Unbound constructor " ^ String.concatWith "." (ms @ [s]) ^ " in pattern")
adamc@171 1024 | PatHasArg loc =>
adamc@171 1025 ErrorMsg.errorAt loc "Constructor expects no argument but is used with argument"
adamc@171 1026 | PatHasNoArg loc =>
adamc@171 1027 ErrorMsg.errorAt loc "Constructor expects argument but is used with no argument"
adamc@172 1028 | Inexhaustive loc =>
adamc@172 1029 ErrorMsg.errorAt loc "Inexhaustive 'case'"
adamc@175 1030 | DuplicatePatField (loc, s) =>
adamc@175 1031 ErrorMsg.errorAt loc ("Duplicate record field " ^ s ^ " in pattern")
adamc@211 1032 | OutOfContext loc =>
adamc@211 1033 ErrorMsg.errorAt loc "Type class wildcard occurs out of context"
adamc@211 1034 | Unresolvable (loc, c) =>
adamc@211 1035 (ErrorMsg.errorAt loc "Can't resolve type class instance";
adamc@211 1036 eprefaces' [("Class constraint", p_con env c)])
adamc@210 1037
adamc@86 1038 fun checkCon (env, denv) e c1 c2 =
adamc@86 1039 unifyCons (env, denv) c1 c2
adamc@10 1040 handle CUnify (c1, c2, err) =>
adamc@86 1041 (expError env (Unify (e, c1, c2, err));
adamc@86 1042 [])
adamc@10 1043
adamc@171 1044 fun checkPatCon (env, denv) p c1 c2 =
adamc@171 1045 unifyCons (env, denv) c1 c2
adamc@171 1046 handle CUnify (c1, c2, err) =>
adamc@171 1047 (expError env (PatUnify (p, c1, c2, err));
adamc@171 1048 [])
adamc@171 1049
adamc@14 1050 fun primType env p =
adamc@56 1051 case p of
adamc@56 1052 P.Int _ => !int
adamc@56 1053 | P.Float _ => !float
adamc@56 1054 | P.String _ => !string
adamc@14 1055
adamc@71 1056 fun recCons (k, nm, v, rest, loc) =
adamc@71 1057 (L'.CConcat ((L'.CRecord (k, [(nm, v)]), loc),
adamc@71 1058 rest), loc)
adamc@71 1059
adamc@71 1060 fun foldType (dom, loc) =
adamc@71 1061 (L'.TCFun (L'.Explicit, "ran", (L'.KArrow ((L'.KRecord dom, loc), (L'.KType, loc)), loc),
adamc@71 1062 (L'.TFun ((L'.TCFun (L'.Explicit, "nm", (L'.KName, loc),
adamc@71 1063 (L'.TCFun (L'.Explicit, "v", dom,
adamc@71 1064 (L'.TCFun (L'.Explicit, "rest", (L'.KRecord dom, loc),
adamc@71 1065 (L'.TFun ((L'.CApp ((L'.CRel 3, loc), (L'.CRel 0, loc)), loc),
adamc@71 1066 (L'.CApp ((L'.CRel 3, loc),
adamc@71 1067 recCons (dom,
adamc@71 1068 (L'.CRel 2, loc),
adamc@71 1069 (L'.CRel 1, loc),
adamc@71 1070 (L'.CRel 0, loc),
adamc@71 1071 loc)), loc)), loc)),
adamc@71 1072 loc)), loc)), loc),
adamc@71 1073 (L'.TFun ((L'.CApp ((L'.CRel 0, loc), (L'.CRecord (dom, []), loc)), loc),
adamc@71 1074 (L'.TCFun (L'.Explicit, "r", (L'.KRecord dom, loc),
adamc@71 1075 (L'.CApp ((L'.CRel 1, loc), (L'.CRel 0, loc)), loc)), loc)),
adamc@71 1076 loc)), loc)), loc)
adamc@71 1077
adamc@86 1078 fun elabHead (env, denv) (e as (_, loc)) t =
adamc@15 1079 let
adamc@15 1080 fun unravel (t, e) =
adamc@86 1081 let
adamc@86 1082 val (t, gs) = hnormCon (env, denv) t
adamc@86 1083 in
adamc@86 1084 case t of
adamc@86 1085 (L'.TCFun (L'.Implicit, x, k, t'), _) =>
adamc@86 1086 let
adamc@86 1087 val u = cunif (loc, k)
adamc@86 1088
adamc@86 1089 val (e, t, gs') = unravel (subConInCon (0, u) t',
adamc@86 1090 (L'.ECApp (e, u), loc))
adamc@86 1091 in
adamc@86 1092 (e, t, gs @ gs')
adamc@86 1093 end
adamc@86 1094 | _ => (e, t, gs)
adamc@86 1095 end
adamc@15 1096 in
adamc@15 1097 unravel (t, e)
adamc@15 1098 end
adamc@15 1099
adamc@174 1100 fun elabPat (pAll as (p, loc), (env, denv, bound)) =
adamc@171 1101 let
adamc@171 1102 val perror = (L'.PWild, loc)
adamc@171 1103 val terror = (L'.CError, loc)
adamc@171 1104 val pterror = (perror, terror)
adamc@171 1105 val rerror = (pterror, (env, bound))
adamc@171 1106
adamc@191 1107 fun pcon (pc, po, xs, to, dn, dk) =
adamc@188 1108 case (po, to) of
adamc@188 1109 (NONE, SOME _) => (expError env (PatHasNoArg loc);
adamc@188 1110 rerror)
adamc@188 1111 | (SOME _, NONE) => (expError env (PatHasArg loc);
adamc@188 1112 rerror)
adamc@191 1113 | (NONE, NONE) =>
adamc@191 1114 let
adamc@191 1115 val k = (L'.KType, loc)
adamc@191 1116 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@191 1117 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@191 1118 in
adamc@191 1119 (((L'.PCon (dk, pc, unifs, NONE), loc), dn),
adamc@191 1120 (env, bound))
adamc@191 1121 end
adamc@188 1122 | (SOME p, SOME t) =>
adamc@188 1123 let
adamc@188 1124 val ((p', pt), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@191 1125
adamc@191 1126 val k = (L'.KType, loc)
adamc@191 1127 val unifs = map (fn _ => cunif (loc, k)) xs
adamc@194 1128 val nxs = length unifs - 1
adamc@194 1129 val t = ListUtil.foldli (fn (i, u, t) => subConInCon (nxs - i, u) t) t unifs
adamc@191 1130 val dn = foldl (fn (u, dn) => (L'.CApp (dn, u), loc)) dn unifs
adamc@188 1131 in
adamc@191 1132 ignore (checkPatCon (env, denv) p' pt t);
adamc@191 1133 (((L'.PCon (dk, pc, unifs, SOME p'), loc), dn),
adamc@188 1134 (env, bound))
adamc@188 1135 end
adamc@171 1136 in
adamc@171 1137 case p of
adamc@171 1138 L.PWild => (((L'.PWild, loc), cunif (loc, (L'.KType, loc))),
adamc@171 1139 (env, bound))
adamc@171 1140 | L.PVar x =>
adamc@171 1141 let
adamc@171 1142 val t = if SS.member (bound, x) then
adamc@171 1143 (expError env (DuplicatePatternVariable (loc, x));
adamc@171 1144 terror)
adamc@171 1145 else
adamc@171 1146 cunif (loc, (L'.KType, loc))
adamc@171 1147 in
adamc@182 1148 (((L'.PVar (x, t), loc), t),
adamc@171 1149 (E.pushERel env x t, SS.add (bound, x)))
adamc@171 1150 end
adamc@173 1151 | L.PPrim p => (((L'.PPrim p, loc), primType env p),
adamc@173 1152 (env, bound))
adamc@171 1153 | L.PCon ([], x, po) =>
adamc@171 1154 (case E.lookupConstructor env x of
adamc@174 1155 NONE => (expError env (UnboundConstructor (loc, [], x));
adamc@171 1156 rerror)
adamc@191 1157 | SOME (dk, n, xs, to, dn) => pcon (L'.PConVar n, po, xs, to, (L'.CNamed dn, loc), dk))
adamc@174 1158 | L.PCon (m1 :: ms, x, po) =>
adamc@174 1159 (case E.lookupStr env m1 of
adamc@174 1160 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@174 1161 rerror)
adamc@174 1162 | SOME (n, sgn) =>
adamc@174 1163 let
adamc@174 1164 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@174 1165 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@182 1166 NONE => raise Fail "elabPat: Unknown substructure"
adamc@174 1167 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@174 1168 ((L'.StrVar n, loc), sgn) ms
adamc@174 1169 in
adamc@174 1170 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1171 NONE => (expError env (UnboundConstructor (loc, m1 :: ms, x));
adamc@174 1172 rerror)
adamc@191 1173 | SOME (dk, _, xs, to, dn) => pcon (L'.PConProj (n, ms, x), po, xs, to, dn, dk)
adamc@174 1174 end)
adamc@174 1175
adamc@175 1176 | L.PRecord (xps, flex) =>
adamc@175 1177 let
adamc@175 1178 val (xpts, (env, bound, _)) =
adamc@175 1179 ListUtil.foldlMap (fn ((x, p), (env, bound, fbound)) =>
adamc@175 1180 let
adamc@175 1181 val ((p', t), (env, bound)) = elabPat (p, (env, denv, bound))
adamc@175 1182 in
adamc@175 1183 if SS.member (fbound, x) then
adamc@175 1184 expError env (DuplicatePatField (loc, x))
adamc@175 1185 else
adamc@175 1186 ();
adamc@175 1187 ((x, p', t), (env, bound, SS.add (fbound, x)))
adamc@175 1188 end)
adamc@175 1189 (env, bound, SS.empty) xps
adamc@175 1190
adamc@175 1191 val k = (L'.KType, loc)
adamc@175 1192 val c = (L'.CRecord (k, map (fn (x, _, t) => ((L'.CName x, loc), t)) xpts), loc)
adamc@176 1193 val c =
adamc@175 1194 if flex then
adamc@176 1195 (L'.CConcat (c, cunif (loc, (L'.KRecord k, loc))), loc)
adamc@175 1196 else
adamc@176 1197 c
adamc@175 1198 in
adamc@182 1199 (((L'.PRecord xpts, loc),
adamc@175 1200 (L'.TRecord c, loc)),
adamc@175 1201 (env, bound))
adamc@175 1202 end
adamc@175 1203
adamc@171 1204 end
adamc@171 1205
adamc@172 1206 datatype coverage =
adamc@172 1207 Wild
adamc@173 1208 | None
adamc@172 1209 | Datatype of coverage IM.map
adamc@175 1210 | Record of coverage SM.map list
adamc@172 1211
adamc@172 1212 fun exhaustive (env, denv, t, ps) =
adamc@172 1213 let
adamc@172 1214 fun pcCoverage pc =
adamc@172 1215 case pc of
adamc@172 1216 L'.PConVar n => n
adamc@174 1217 | L'.PConProj (m1, ms, x) =>
adamc@174 1218 let
adamc@174 1219 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1220 in
adamc@174 1221 case E.projectConstructor env {str = str, sgn = sgn, field = x} of
adamc@174 1222 NONE => raise Fail "exhaustive: Can't project constructor"
adamc@191 1223 | SOME (_, n, _, _, _) => n
adamc@174 1224 end
adamc@172 1225
adamc@172 1226 fun coverage (p, _) =
adamc@172 1227 case p of
adamc@172 1228 L'.PWild => Wild
adamc@172 1229 | L'.PVar _ => Wild
adamc@173 1230 | L'.PPrim _ => None
adamc@191 1231 | L'.PCon (_, pc, _, NONE) => Datatype (IM.insert (IM.empty, pcCoverage pc, Wild))
adamc@191 1232 | L'.PCon (_, pc, _, SOME p) => Datatype (IM.insert (IM.empty, pcCoverage pc, coverage p))
adamc@182 1233 | L'.PRecord xps => Record [foldl (fn ((x, p, _), fmap) =>
adamc@182 1234 SM.insert (fmap, x, coverage p)) SM.empty xps]
adamc@176 1235
adamc@172 1236 fun merge (c1, c2) =
adamc@172 1237 case (c1, c2) of
adamc@173 1238 (None, _) => c2
adamc@173 1239 | (_, None) => c1
adamc@173 1240
adamc@173 1241 | (Wild, _) => Wild
adamc@172 1242 | (_, Wild) => Wild
adamc@172 1243
adamc@172 1244 | (Datatype cm1, Datatype cm2) => Datatype (IM.unionWith merge (cm1, cm2))
adamc@172 1245
adamc@175 1246 | (Record fm1, Record fm2) => Record (fm1 @ fm2)
adamc@175 1247
adamc@175 1248 | _ => None
adamc@175 1249
adamc@172 1250 fun combinedCoverage ps =
adamc@172 1251 case ps of
adamc@172 1252 [] => raise Fail "Empty pattern list for coverage checking"
adamc@172 1253 | [p] => coverage p
adamc@172 1254 | p :: ps => merge (coverage p, combinedCoverage ps)
adamc@172 1255
adamc@175 1256 fun enumerateCases t =
adamc@175 1257 let
adamc@175 1258 fun dtype cons =
adamc@175 1259 ListUtil.mapConcat (fn (_, n, to) =>
adamc@175 1260 case to of
adamc@175 1261 NONE => [Datatype (IM.insert (IM.empty, n, Wild))]
adamc@175 1262 | SOME t => map (fn c => Datatype (IM.insert (IM.empty, n, c)))
adamc@175 1263 (enumerateCases t)) cons
adamc@175 1264 in
adamc@175 1265 case #1 (#1 (hnormCon (env, denv) t)) of
adamc@175 1266 L'.CNamed n =>
adamc@175 1267 (let
adamc@175 1268 val dt = E.lookupDatatype env n
adamc@175 1269 val cons = E.constructors dt
adamc@175 1270 in
adamc@175 1271 dtype cons
adamc@175 1272 end handle E.UnboundNamed _ => [Wild])
adamc@175 1273 | L'.TRecord c =>
adamc@175 1274 (case #1 (#1 (hnormCon (env, denv) c)) of
adamc@175 1275 L'.CRecord (_, xts) =>
adamc@175 1276 let
adamc@175 1277 val xts = map (fn (x, t) => (#1 (hnormCon (env, denv) x), t)) xts
adamc@175 1278
adamc@175 1279 fun exponentiate fs =
adamc@175 1280 case fs of
adamc@175 1281 [] => [SM.empty]
adamc@175 1282 | ((L'.CName x, _), t) :: rest =>
adamc@175 1283 let
adamc@175 1284 val this = enumerateCases t
adamc@175 1285 val rest = exponentiate rest
adamc@175 1286 in
adamc@175 1287 ListUtil.mapConcat (fn fmap =>
adamc@175 1288 map (fn c => SM.insert (fmap, x, c)) this) rest
adamc@175 1289 end
adamc@175 1290 | _ => raise Fail "exponentiate: Not CName"
adamc@175 1291 in
adamc@175 1292 if List.exists (fn ((L'.CName _, _), _) => false
adamc@175 1293 | (c, _) => true) xts then
adamc@175 1294 [Wild]
adamc@175 1295 else
adamc@175 1296 map (fn ls => Record [ls]) (exponentiate xts)
adamc@175 1297 end
adamc@175 1298 | _ => [Wild])
adamc@175 1299 | _ => [Wild]
adamc@175 1300 end
adamc@175 1301
adamc@175 1302 fun coverageImp (c1, c2) =
adamc@175 1303 case (c1, c2) of
adamc@175 1304 (Wild, _) => true
adamc@175 1305
adamc@175 1306 | (Datatype cmap1, Datatype cmap2) =>
adamc@175 1307 List.all (fn (n, c2) =>
adamc@175 1308 case IM.find (cmap1, n) of
adamc@175 1309 NONE => false
adamc@175 1310 | SOME c1 => coverageImp (c1, c2)) (IM.listItemsi cmap2)
adamc@175 1311
adamc@175 1312 | (Record fmaps1, Record fmaps2) =>
adamc@175 1313 List.all (fn fmap2 =>
adamc@175 1314 List.exists (fn fmap1 =>
adamc@175 1315 List.all (fn (x, c2) =>
adamc@175 1316 case SM.find (fmap1, x) of
adamc@175 1317 NONE => true
adamc@175 1318 | SOME c1 => coverageImp (c1, c2))
adamc@175 1319 (SM.listItemsi fmap2))
adamc@175 1320 fmaps1) fmaps2
adamc@175 1321
adamc@175 1322 | _ => false
adamc@175 1323
adamc@172 1324 fun isTotal (c, t) =
adamc@172 1325 case c of
adamc@173 1326 None => (false, [])
adamc@173 1327 | Wild => (true, [])
adamc@172 1328 | Datatype cm =>
adamc@172 1329 let
adamc@172 1330 val ((t, _), gs) = hnormCon (env, denv) t
adamc@174 1331
adamc@174 1332 fun dtype cons =
adamc@174 1333 foldl (fn ((_, n, to), (total, gs)) =>
adamc@174 1334 case IM.find (cm, n) of
adamc@174 1335 NONE => (false, gs)
adamc@174 1336 | SOME c' =>
adamc@174 1337 case to of
adamc@174 1338 NONE => (total, gs)
adamc@174 1339 | SOME t' =>
adamc@174 1340 let
adamc@174 1341 val (total, gs') = isTotal (c', t')
adamc@174 1342 in
adamc@174 1343 (total, gs' @ gs)
adamc@174 1344 end)
adamc@174 1345 (true, gs) cons
adamc@191 1346
adamc@191 1347 fun unapp t =
adamc@191 1348 case t of
adamc@191 1349 L'.CApp ((t, _), _) => unapp t
adamc@191 1350 | _ => t
adamc@172 1351 in
adamc@191 1352 case unapp t of
adamc@172 1353 L'.CNamed n =>
adamc@172 1354 let
adamc@172 1355 val dt = E.lookupDatatype env n
adamc@172 1356 val cons = E.constructors dt
adamc@172 1357 in
adamc@174 1358 dtype cons
adamc@174 1359 end
adamc@174 1360 | L'.CModProj (m1, ms, x) =>
adamc@174 1361 let
adamc@174 1362 val (str, sgn) = E.chaseMpath env (m1, ms)
adamc@174 1363 in
adamc@174 1364 case E.projectDatatype env {str = str, sgn = sgn, field = x} of
adamc@174 1365 NONE => raise Fail "isTotal: Can't project datatype"
adamc@191 1366 | SOME (_, cons) => dtype cons
adamc@172 1367 end
adamc@172 1368 | L'.CError => (true, gs)
adamc@172 1369 | _ => raise Fail "isTotal: Not a datatype"
adamc@172 1370 end
adamc@175 1371 | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases t), [])
adamc@172 1372 in
adamc@172 1373 isTotal (combinedCoverage ps, t)
adamc@172 1374 end
adamc@172 1375
adamc@216 1376 fun normClassConstraint envs c =
adamc@216 1377 let
adamc@216 1378 val ((c, loc), gs1) = hnormCon envs c
adamc@216 1379 in
adamc@216 1380 case c of
adamc@216 1381 L'.CApp (f, x) =>
adamc@216 1382 let
adamc@216 1383 val (f, gs2) = hnormCon envs f
adamc@216 1384 val (x, gs3) = hnormCon envs x
adamc@216 1385 in
adamc@216 1386 ((L'.CApp (f, x), loc), gs1 @ gs2 @ gs3)
adamc@216 1387 end
adamc@216 1388 | _ => ((c, loc), gs1)
adamc@216 1389 end
adamc@216 1390
adamc@92 1391 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1392 let
adamc@92 1393
adamc@92 1394 in
adamc@92 1395 (*eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@10 1396
adamc@91 1397 case e of
adamc@91 1398 L.EAnnot (e, t) =>
adamc@91 1399 let
adamc@91 1400 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1401 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1402 val gs3 = checkCon (env, denv) e' et t'
adamc@91 1403 in
adamc@91 1404 (e', t', gs1 @ gs2 @ gs3)
adamc@91 1405 end
adamc@34 1406
adamc@91 1407 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@91 1408 | L.EVar ([], s) =>
adamc@91 1409 (case E.lookupE env s of
adamc@91 1410 E.NotBound =>
adamc@91 1411 (expError env (UnboundExp (loc, s));
adamc@91 1412 (eerror, cerror, []))
adamc@91 1413 | E.Rel (n, t) => ((L'.ERel n, loc), t, [])
adamc@191 1414 | E.Named (n, t) =>
adamc@191 1415 if Char.isUpper (String.sub (s, 0)) then
adamc@191 1416 elabHead (env, denv) (L'.ENamed n, loc) t
adamc@191 1417 else
adamc@191 1418 ((L'.ENamed n, loc), t, []))
adamc@91 1419 | L.EVar (m1 :: ms, s) =>
adamc@91 1420 (case E.lookupStr env m1 of
adamc@91 1421 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1422 (eerror, cerror, []))
adamc@91 1423 | SOME (n, sgn) =>
adamc@91 1424 let
adamc@91 1425 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1426 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1427 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1428 (strerror, sgnerror))
adamc@91 1429 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1430 ((L'.StrVar n, loc), sgn) ms
adamc@10 1431
adamc@91 1432 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1433 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1434 cerror)
adamc@91 1435 | SOME t => t
adamc@91 1436 in
adamc@91 1437 ((L'.EModProj (n, ms, s), loc), t, [])
adamc@91 1438 end)
adamc@86 1439
adamc@211 1440 | L.EApp (e1, (L.EWild, _)) =>
adamc@210 1441 let
adamc@210 1442 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@210 1443 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@210 1444 val (t1, gs3) = hnormCon (env, denv) t1
adamc@210 1445 in
adamc@210 1446 case t1 of
adamc@211 1447 (L'.TFun (dom, ran), _) =>
adamc@216 1448 let
adamc@216 1449 val (dom, gs4) = normClassConstraint (env, denv) dom
adamc@216 1450 in
adamc@216 1451 case E.resolveClass env dom of
adamc@216 1452 NONE => (expError env (Unresolvable (loc, dom));
adamc@216 1453 (eerror, cerror, []))
adamc@216 1454 | SOME pf => ((L'.EApp (e1', pf), loc), ran, gs1 @ gs2 @ gs3 @ gs4)
adamc@216 1455 end
adamc@211 1456 | _ => (expError env (OutOfContext loc);
adamc@211 1457 (eerror, cerror, []))
adamc@210 1458 end
adamc@211 1459 | L.EWild => (expError env (OutOfContext loc);
adamc@211 1460 (eerror, cerror, []))
adamc@210 1461
adamc@91 1462 | L.EApp (e1, e2) =>
adamc@91 1463 let
adamc@91 1464 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@91 1465 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@91 1466 val (e2', t2, gs3) = elabExp (env, denv) e2
adamc@71 1467
adamc@91 1468 val dom = cunif (loc, ktype)
adamc@91 1469 val ran = cunif (loc, ktype)
adamc@91 1470 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1471
adamc@91 1472 val gs4 = checkCon (env, denv) e1' t1 t
adamc@91 1473 val gs5 = checkCon (env, denv) e2' t2 dom
adamc@205 1474
adamc@205 1475 val gs = gs1 @ gs2 @ gs3 @ gs4 @ gs5
adamc@91 1476 in
adamc@205 1477 ((L'.EApp (e1', e2'), loc), ran, gs)
adamc@91 1478 end
adamc@91 1479 | L.EAbs (x, to, e) =>
adamc@91 1480 let
adamc@91 1481 val (t', gs1) = case to of
adamc@91 1482 NONE => (cunif (loc, ktype), [])
adamc@91 1483 | SOME t =>
adamc@91 1484 let
adamc@91 1485 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1486 in
adamc@91 1487 checkKind env t' tk ktype;
adamc@91 1488 (t', gs)
adamc@91 1489 end
adamc@91 1490 val (e', et, gs2) = elabExp (E.pushERel env x t', denv) e
adamc@91 1491 in
adamc@91 1492 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1493 (L'.TFun (t', et), loc),
adamc@91 1494 gs1 @ gs2)
adamc@91 1495 end
adamc@91 1496 | L.ECApp (e, c) =>
adamc@91 1497 let
adamc@91 1498 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1499 val (e', et, gs2) = elabHead (env, denv) e' et
adamc@91 1500 val (c', ck, gs3) = elabCon (env, denv) c
adamc@91 1501 val ((et', _), gs4) = hnormCon (env, denv) et
adamc@91 1502 in
adamc@91 1503 case et' of
adamc@91 1504 L'.CError => (eerror, cerror, [])
adamc@91 1505 | L'.TCFun (_, _, k, eb) =>
adamc@91 1506 let
adamc@91 1507 val () = checkKind env c' ck k
adamc@91 1508 val eb' = subConInCon (0, c') eb
adamc@91 1509 handle SynUnif => (expError env (Unif ("substitution", eb));
adamc@91 1510 cerror)
adamc@91 1511 in
adamc@91 1512 ((L'.ECApp (e', c'), loc), eb', gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1513 end
adamc@91 1514
adamc@91 1515 | L'.CUnif _ =>
adamc@91 1516 (expError env (Unif ("application", et));
adamc@91 1517 (eerror, cerror, []))
adamc@91 1518
adamc@91 1519 | _ =>
adamc@91 1520 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1521 (eerror, cerror, []))
adamc@91 1522 end
adamc@91 1523 | L.ECAbs (expl, x, k, e) =>
adamc@91 1524 let
adamc@91 1525 val expl' = elabExplicitness expl
adamc@91 1526 val k' = elabKind k
adamc@91 1527 val (e', et, gs) = elabExp (E.pushCRel env x k', D.enter denv) e
adamc@91 1528 in
adamc@91 1529 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1530 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1531 gs)
adamc@91 1532 end
adamc@91 1533
adamc@91 1534 | L.EDisjoint (c1, c2, e) =>
adamc@91 1535 let
adamc@91 1536 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1537 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1538
adamc@91 1539 val ku1 = kunif loc
adamc@91 1540 val ku2 = kunif loc
adamc@91 1541
adamc@91 1542 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@91 1543 val (e', t, gs4) = elabExp (env, denv') e
adamc@91 1544 in
adamc@91 1545 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1546 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1547
adamc@91 1548 (e', (L'.TDisjoint (c1', c2', t), loc), gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1549 end
adamc@91 1550
adamc@91 1551 | L.ERecord xes =>
adamc@91 1552 let
adamc@91 1553 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1554 let
adamc@91 1555 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1556 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1557 in
adamc@91 1558 checkKind env x' xk kname;
adamc@91 1559 ((x', e', et), gs1 @ gs2 @ gs)
adamc@91 1560 end)
adamc@91 1561 [] xes
adamc@91 1562
adamc@91 1563 val k = (L'.KType, loc)
adamc@91 1564
adamc@91 1565 fun prove (xets, gs) =
adamc@91 1566 case xets of
adamc@91 1567 [] => gs
adamc@91 1568 | (x, _, t) :: rest =>
adamc@91 1569 let
adamc@91 1570 val xc = (x, t)
adamc@91 1571 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1572 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1573 let
adamc@91 1574 val xc' = (x', t')
adamc@91 1575 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1576 in
adamc@91 1577 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1578 end)
adamc@91 1579 gs rest
adamc@91 1580 in
adamc@91 1581 prove (rest, gs)
adamc@91 1582 end
adamc@91 1583 in
adamc@91 1584 ((L'.ERecord xes', loc),
adamc@91 1585 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@91 1586 prove (xes', gs))
adamc@91 1587 end
adamc@91 1588
adamc@91 1589 | L.EField (e, c) =>
adamc@91 1590 let
adamc@91 1591 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1592 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1593
adamc@91 1594 val ft = cunif (loc, ktype)
adamc@91 1595 val rest = cunif (loc, ktype_record)
adamc@91 1596 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@91 1597
adamc@91 1598 val gs3 =
adamc@91 1599 checkCon (env, denv) e' et
adamc@91 1600 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@91 1601 val gs4 = D.prove env denv (first, rest, loc)
adamc@91 1602 in
adamc@91 1603 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1604 end
adamc@91 1605
adamc@149 1606 | L.ECut (e, c) =>
adamc@149 1607 let
adamc@149 1608 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1609 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1610
adamc@149 1611 val ft = cunif (loc, ktype)
adamc@149 1612 val rest = cunif (loc, ktype_record)
adamc@149 1613 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@149 1614
adamc@149 1615 val gs3 =
adamc@149 1616 checkCon (env, denv) e' et
adamc@149 1617 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1618 val gs4 = D.prove env denv (first, rest, loc)
adamc@149 1619 in
adamc@149 1620 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc), gs1 @ gs2 @ gs3 @ gs4)
adamc@149 1621 end
adamc@149 1622
adamc@91 1623 | L.EFold =>
adamc@91 1624 let
adamc@91 1625 val dom = kunif loc
adamc@91 1626 in
adamc@91 1627 ((L'.EFold dom, loc), foldType (dom, loc), [])
adamc@91 1628 end
adamc@170 1629
adamc@171 1630 | L.ECase (e, pes) =>
adamc@171 1631 let
adamc@171 1632 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1633 val result = cunif (loc, (L'.KType, loc))
adamc@171 1634 val (pes', gs) = ListUtil.foldlMap
adamc@171 1635 (fn ((p, e), gs) =>
adamc@171 1636 let
adamc@174 1637 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
adamc@171 1638
adamc@171 1639 val gs1 = checkPatCon (env, denv) p' pt et
adamc@171 1640 val (e', et, gs2) = elabExp (env, denv) e
adamc@171 1641 val gs3 = checkCon (env, denv) e' et result
adamc@171 1642 in
adamc@171 1643 ((p', e'), gs1 @ gs2 @ gs3 @ gs)
adamc@171 1644 end)
adamc@171 1645 gs1 pes
adamc@172 1646
adamc@172 1647 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
adamc@171 1648 in
adamc@172 1649 if total then
adamc@172 1650 ()
adamc@172 1651 else
adamc@172 1652 expError env (Inexhaustive loc);
adamc@172 1653
adamc@182 1654 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs' @ gs)
adamc@171 1655 end
adamc@91 1656 end
adamc@12 1657
adamc@12 1658
adamc@6 1659 datatype decl_error =
adamc@91 1660 KunifsRemain of L'.decl list
adamc@91 1661 | CunifsRemain of L'.decl list
adamc@91 1662
adamc@91 1663 fun lspan [] = ErrorMsg.dummySpan
adamc@91 1664 | lspan ((_, loc) :: _) = loc
adamc@6 1665
adamc@6 1666 fun declError env err =
adamc@6 1667 case err of
adamc@91 1668 KunifsRemain ds =>
adamc@91 1669 (ErrorMsg.errorAt (lspan ds) "Some kind unification variables are undetermined in declaration";
adamc@91 1670 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
adamc@91 1671 | CunifsRemain ds =>
adamc@91 1672 (ErrorMsg.errorAt (lspan ds) "Some constructor unification variables are undetermined in declaration";
adamc@91 1673 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
adamc@6 1674
adamc@31 1675 datatype sgn_error =
adamc@31 1676 UnboundSgn of ErrorMsg.span * string
adamc@31 1677 | UnmatchedSgi of L'.sgn_item
adamc@31 1678 | SgiWrongKind of L'.sgn_item * L'.kind * L'.sgn_item * L'.kind * kunify_error
adamc@31 1679 | SgiWrongCon of L'.sgn_item * L'.con * L'.sgn_item * L'.con * cunify_error
adamc@156 1680 | SgiMismatchedDatatypes of L'.sgn_item * L'.sgn_item * (L'.con * L'.con * cunify_error) option
adamc@41 1681 | SgnWrongForm of L'.sgn * L'.sgn
adamc@42 1682 | UnWhereable of L'.sgn * string
adamc@75 1683 | WhereWrongKind of L'.kind * L'.kind * kunify_error
adamc@58 1684 | NotIncludable of L'.sgn
adamc@62 1685 | DuplicateCon of ErrorMsg.span * string
adamc@62 1686 | DuplicateVal of ErrorMsg.span * string
adamc@62 1687 | DuplicateSgn of ErrorMsg.span * string
adamc@62 1688 | DuplicateStr of ErrorMsg.span * string
adamc@88 1689 | NotConstraintsable of L'.sgn
adamc@31 1690
adamc@31 1691 fun sgnError env err =
adamc@31 1692 case err of
adamc@31 1693 UnboundSgn (loc, s) =>
adamc@31 1694 ErrorMsg.errorAt loc ("Unbound signature variable " ^ s)
adamc@31 1695 | UnmatchedSgi (sgi as (_, loc)) =>
adamc@31 1696 (ErrorMsg.errorAt loc "Unmatched signature item";
adamc@31 1697 eprefaces' [("Item", p_sgn_item env sgi)])
adamc@31 1698 | SgiWrongKind (sgi1, k1, sgi2, k2, kerr) =>
adamc@31 1699 (ErrorMsg.errorAt (#2 sgi1) "Kind unification failure in signature matching:";
adamc@59 1700 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@59 1701 ("Need", p_sgn_item env sgi2),
adamc@31 1702 ("Kind 1", p_kind k1),
adamc@31 1703 ("Kind 2", p_kind k2)];
adamc@31 1704 kunifyError kerr)
adamc@31 1705 | SgiWrongCon (sgi1, c1, sgi2, c2, cerr) =>
adamc@31 1706 (ErrorMsg.errorAt (#2 sgi1) "Constructor unification failure in signature matching:";
adamc@59 1707 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@59 1708 ("Need", p_sgn_item env sgi2),
adamc@31 1709 ("Con 1", p_con env c1),
adamc@31 1710 ("Con 2", p_con env c2)];
adamc@31 1711 cunifyError env cerr)
adamc@156 1712 | SgiMismatchedDatatypes (sgi1, sgi2, cerro) =>
adamc@156 1713 (ErrorMsg.errorAt (#2 sgi1) "Mismatched 'datatype' specifications:";
adamc@156 1714 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@156 1715 ("Need", p_sgn_item env sgi2)];
adamc@156 1716 Option.app (fn (c1, c2, ue) =>
adamc@156 1717 (eprefaces "Unification error"
adamc@156 1718 [("Con 1", p_con env c1),
adamc@156 1719 ("Con 2", p_con env c2)];
adamc@156 1720 cunifyError env ue)) cerro)
adamc@41 1721 | SgnWrongForm (sgn1, sgn2) =>
adamc@41 1722 (ErrorMsg.errorAt (#2 sgn1) "Incompatible signatures:";
adamc@41 1723 eprefaces' [("Sig 1", p_sgn env sgn1),
adamc@41 1724 ("Sig 2", p_sgn env sgn2)])
adamc@42 1725 | UnWhereable (sgn, x) =>
adamc@42 1726 (ErrorMsg.errorAt (#2 sgn) "Unavailable field for 'where'";
adamc@42 1727 eprefaces' [("Signature", p_sgn env sgn),
adamc@42 1728 ("Field", PD.string x)])
adamc@75 1729 | WhereWrongKind (k1, k2, kerr) =>
adamc@75 1730 (ErrorMsg.errorAt (#2 k1) "Wrong kind for 'where'";
adamc@75 1731 eprefaces' [("Have", p_kind k1),
adamc@75 1732 ("Need", p_kind k2)];
adamc@75 1733 kunifyError kerr)
adamc@58 1734 | NotIncludable sgn =>
adamc@58 1735 (ErrorMsg.errorAt (#2 sgn) "Invalid signature to 'include'";
adamc@58 1736 eprefaces' [("Signature", p_sgn env sgn)])
adamc@62 1737 | DuplicateCon (loc, s) =>
adamc@62 1738 ErrorMsg.errorAt loc ("Duplicate constructor " ^ s ^ " in signature")
adamc@62 1739 | DuplicateVal (loc, s) =>
adamc@62 1740 ErrorMsg.errorAt loc ("Duplicate value " ^ s ^ " in signature")
adamc@62 1741 | DuplicateSgn (loc, s) =>
adamc@62 1742 ErrorMsg.errorAt loc ("Duplicate signature " ^ s ^ " in signature")
adamc@62 1743 | DuplicateStr (loc, s) =>
adamc@62 1744 ErrorMsg.errorAt loc ("Duplicate structure " ^ s ^ " in signature")
adamc@88 1745 | NotConstraintsable sgn =>
adamc@88 1746 (ErrorMsg.errorAt (#2 sgn) "Invalid signature for 'open constraints'";
adamc@88 1747 eprefaces' [("Signature", p_sgn env sgn)])
adamc@31 1748
adamc@31 1749 datatype str_error =
adamc@31 1750 UnboundStr of ErrorMsg.span * string
adamc@44 1751 | NotFunctor of L'.sgn
adamc@46 1752 | FunctorRebind of ErrorMsg.span
adamc@61 1753 | UnOpenable of L'.sgn
adamc@75 1754 | NotType of L'.kind * (L'.kind * L'.kind * kunify_error)
adamc@156 1755 | DuplicateConstructor of string * ErrorMsg.span
adamc@158 1756 | NotDatatype of ErrorMsg.span
adamc@31 1757
adamc@31 1758 fun strError env err =
adamc@31 1759 case err of
adamc@31 1760 UnboundStr (loc, s) =>
adamc@31 1761 ErrorMsg.errorAt loc ("Unbound structure variable " ^ s)
adamc@44 1762 | NotFunctor sgn =>
adamc@44 1763 (ErrorMsg.errorAt (#2 sgn) "Application of non-functor";
adamc@44 1764 eprefaces' [("Signature", p_sgn env sgn)])
adamc@46 1765 | FunctorRebind loc =>
adamc@46 1766 ErrorMsg.errorAt loc "Attempt to rebind functor"
adamc@61 1767 | UnOpenable sgn =>
adamc@61 1768 (ErrorMsg.errorAt (#2 sgn) "Un-openable structure";
adamc@61 1769 eprefaces' [("Signature", p_sgn env sgn)])
adamc@75 1770 | NotType (k, (k1, k2, ue)) =>
adamc@75 1771 (ErrorMsg.errorAt (#2 k) "'val' type kind is not 'Type'";
adamc@75 1772 eprefaces' [("Kind", p_kind k),
adamc@75 1773 ("Subkind 1", p_kind k1),
adamc@75 1774 ("Subkind 2", p_kind k2)];
adamc@75 1775 kunifyError ue)
adamc@156 1776 | DuplicateConstructor (x, loc) =>
adamc@156 1777 ErrorMsg.errorAt loc ("Duplicate datatype constructor " ^ x)
adamc@158 1778 | NotDatatype loc =>
adamc@158 1779 ErrorMsg.errorAt loc "Trying to import non-datatype as a datatype"
adamc@31 1780
adamc@42 1781 val hnormSgn = E.hnormSgn
adamc@31 1782
adamc@210 1783 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@205 1784
adamc@88 1785 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1786 case sgi of
adamc@76 1787 L.SgiConAbs (x, k) =>
adamc@76 1788 let
adamc@76 1789 val k' = elabKind k
adamc@31 1790
adamc@76 1791 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1792 in
adamc@88 1793 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1794 end
adamc@31 1795
adamc@76 1796 | L.SgiCon (x, ko, c) =>
adamc@76 1797 let
adamc@76 1798 val k' = case ko of
adamc@76 1799 NONE => kunif loc
adamc@76 1800 | SOME k => elabKind k
adamc@31 1801
adamc@83 1802 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1803 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1804 in
adamc@76 1805 checkKind env c' ck k';
adamc@31 1806
adamc@88 1807 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1808 end
adamc@31 1809
adamc@191 1810 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1811 let
adamc@157 1812 val k = (L'.KType, loc)
adamc@191 1813 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1814 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1815 val t = (L'.CNamed n, loc)
adamc@194 1816 val nxs = length xs - 1
adamc@194 1817 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1818
adamc@157 1819 val (xcs, (used, env, gs)) =
adamc@157 1820 ListUtil.foldlMap
adamc@157 1821 (fn ((x, to), (used, env, gs)) =>
adamc@157 1822 let
adamc@157 1823 val (to, t, gs') = case to of
adamc@157 1824 NONE => (NONE, t, gs)
adamc@157 1825 | SOME t' =>
adamc@157 1826 let
adamc@157 1827 val (t', tk, gs') = elabCon (env, denv) t'
adamc@157 1828 in
adamc@157 1829 checkKind env t' tk k;
adamc@157 1830 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1831 end
adamc@191 1832 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1833
adamc@157 1834 val (env, n') = E.pushENamed env x t
adamc@157 1835 in
adamc@157 1836 if SS.member (used, x) then
adamc@157 1837 strError env (DuplicateConstructor (x, loc))
adamc@157 1838 else
adamc@157 1839 ();
adamc@157 1840 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1841 end)
adamc@157 1842 (SS.empty, env, []) xcs
adamc@191 1843
adamc@191 1844 val env = E.pushDatatype env n xs xcs
adamc@157 1845 in
adamc@191 1846 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1847 end
adamc@156 1848
adamc@158 1849 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1850
adamc@158 1851 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1852 (case E.lookupStr env m1 of
adamc@158 1853 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1854 ([], (env, denv, gs)))
adamc@158 1855 | SOME (n, sgn) =>
adamc@158 1856 let
adamc@158 1857 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1858 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1859 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1860 (strerror, sgnerror))
adamc@158 1861 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1862 ((L'.StrVar n, loc), sgn) ms
adamc@158 1863 in
adamc@161 1864 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@161 1865 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@161 1866 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1867 NONE => (conError env (UnboundDatatype (loc, s));
adamc@161 1868 ([], (env, denv, gs)))
adamc@191 1869 | SOME (xs, xncs) =>
adamc@161 1870 let
adamc@161 1871 val k = (L'.KType, loc)
adamc@191 1872 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1873
adamc@161 1874 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1875 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1876 val env = E.pushDatatype env n' xs xncs
adamc@158 1877
adamc@161 1878 val t = (L'.CNamed n', loc)
adamc@161 1879 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1880 let
adamc@161 1881 val t = case to of
adamc@161 1882 NONE => t
adamc@161 1883 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1884
adamc@191 1885 val t = foldr (fn (x, t) =>
adamc@191 1886 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1887 t xs
adamc@161 1888 in
adamc@161 1889 E.pushENamedAs env x n t
adamc@161 1890 end) env xncs
adamc@161 1891 in
adamc@191 1892 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@161 1893 end)
adamc@161 1894 | _ => (strError env (NotDatatype loc);
adamc@161 1895 ([], (env, denv, [])))
adamc@158 1896 end)
adamc@156 1897
adamc@76 1898 | L.SgiVal (x, c) =>
adamc@76 1899 let
adamc@83 1900 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 1901
adamc@76 1902 val (env', n) = E.pushENamed env x c'
adamc@76 1903 in
adamc@76 1904 (unifyKinds ck ktype
adamc@76 1905 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 1906
adamc@88 1907 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 1908 end
adamc@31 1909
adamc@76 1910 | L.SgiStr (x, sgn) =>
adamc@76 1911 let
adamc@83 1912 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1913 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 1914 in
adamc@88 1915 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1916 end
adamc@31 1917
adamc@76 1918 | L.SgiSgn (x, sgn) =>
adamc@76 1919 let
adamc@83 1920 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1921 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 1922 in
adamc@88 1923 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1924 end
adamc@31 1925
adamc@76 1926 | L.SgiInclude sgn =>
adamc@76 1927 let
adamc@83 1928 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1929 in
adamc@76 1930 case #1 (hnormSgn env sgn') of
adamc@76 1931 L'.SgnConst sgis =>
adamc@88 1932 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 1933 | _ => (sgnError env (NotIncludable sgn');
adamc@88 1934 ([], (env, denv, [])))
adamc@88 1935 end
adamc@88 1936
adamc@88 1937 | L.SgiConstraint (c1, c2) =>
adamc@88 1938 let
adamc@88 1939 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 1940 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 1941
adamc@90 1942 val (denv, gs3) = D.assert env denv (c1', c2')
adamc@88 1943 in
adamc@88 1944 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 1945 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 1946
adamc@90 1947 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
adamc@76 1948 end
adamc@31 1949
adamc@203 1950 | L.SgiTable (x, c) =>
adamc@203 1951 let
adamc@203 1952 val (c', k, gs) = elabCon (env, denv) c
adamc@210 1953 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 1954 in
adamc@203 1955 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 1956 ([(L'.SgiTable (!basis_r, x, n, c'), loc)], (env, denv, gs))
adamc@203 1957 end
adamc@203 1958
adamc@211 1959 | L.SgiClassAbs x =>
adamc@211 1960 let
adamc@211 1961 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1962 val (env, n) = E.pushCNamed env x k NONE
adamc@211 1963 val env = E.pushClass env n
adamc@211 1964 in
adamc@211 1965 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
adamc@211 1966 end
adamc@211 1967
adamc@211 1968 | L.SgiClass (x, c) =>
adamc@211 1969 let
adamc@211 1970 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1971 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 1972 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 1973 val env = E.pushClass env n
adamc@211 1974 in
adamc@211 1975 checkKind env c' ck k;
adamc@211 1976 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
adamc@211 1977 end
adamc@211 1978
adamc@83 1979 and elabSgn (env, denv) (sgn, loc) =
adamc@31 1980 case sgn of
adamc@31 1981 L.SgnConst sgis =>
adamc@31 1982 let
adamc@88 1983 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 1984
adamc@62 1985 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 1986 case sgi of
adamc@62 1987 L'.SgiConAbs (x, _, _) =>
adamc@62 1988 (if SS.member (cons, x) then
adamc@62 1989 sgnError env (DuplicateCon (loc, x))
adamc@62 1990 else
adamc@62 1991 ();
adamc@62 1992 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1993 | L'.SgiCon (x, _, _, _) =>
adamc@62 1994 (if SS.member (cons, x) then
adamc@62 1995 sgnError env (DuplicateCon (loc, x))
adamc@62 1996 else
adamc@62 1997 ();
adamc@62 1998 (SS.add (cons, x), vals, sgns, strs))
adamc@191 1999 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 2000 let
adamc@156 2001 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 2002 (if SS.member (vals, x) then
adamc@156 2003 sgnError env (DuplicateVal (loc, x))
adamc@156 2004 else
adamc@156 2005 ();
adamc@156 2006 SS.add (vals, x)))
adamc@156 2007 vals xncs
adamc@156 2008 in
adamc@156 2009 if SS.member (cons, x) then
adamc@156 2010 sgnError env (DuplicateCon (loc, x))
adamc@156 2011 else
adamc@156 2012 ();
adamc@156 2013 (SS.add (cons, x), vals, sgns, strs)
adamc@156 2014 end
adamc@191 2015 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 2016 (if SS.member (cons, x) then
adamc@156 2017 sgnError env (DuplicateCon (loc, x))
adamc@156 2018 else
adamc@156 2019 ();
adamc@156 2020 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2021 | L'.SgiVal (x, _, _) =>
adamc@62 2022 (if SS.member (vals, x) then
adamc@62 2023 sgnError env (DuplicateVal (loc, x))
adamc@62 2024 else
adamc@62 2025 ();
adamc@62 2026 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2027 | L'.SgiSgn (x, _, _) =>
adamc@62 2028 (if SS.member (sgns, x) then
adamc@62 2029 sgnError env (DuplicateSgn (loc, x))
adamc@62 2030 else
adamc@62 2031 ();
adamc@62 2032 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2033 | L'.SgiStr (x, _, _) =>
adamc@62 2034 (if SS.member (strs, x) then
adamc@62 2035 sgnError env (DuplicateStr (loc, x))
adamc@62 2036 else
adamc@62 2037 ();
adamc@88 2038 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2039 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@205 2040 | L'.SgiTable (_, x, _, _) =>
adamc@203 2041 (if SS.member (vals, x) then
adamc@203 2042 sgnError env (DuplicateVal (loc, x))
adamc@203 2043 else
adamc@203 2044 ();
adamc@211 2045 (cons, SS.add (vals, x), sgns, strs))
adamc@211 2046 | L'.SgiClassAbs (x, _) =>
adamc@211 2047 (if SS.member (cons, x) then
adamc@211 2048 sgnError env (DuplicateCon (loc, x))
adamc@211 2049 else
adamc@211 2050 ();
adamc@211 2051 (SS.add (cons, x), vals, sgns, strs))
adamc@211 2052 | L'.SgiClass (x, _, _) =>
adamc@211 2053 (if SS.member (cons, x) then
adamc@211 2054 sgnError env (DuplicateCon (loc, x))
adamc@211 2055 else
adamc@211 2056 ();
adamc@211 2057 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2058 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2059 in
adamc@83 2060 ((L'.SgnConst sgis', loc), gs)
adamc@31 2061 end
adamc@31 2062 | L.SgnVar x =>
adamc@31 2063 (case E.lookupSgn env x of
adamc@31 2064 NONE =>
adamc@31 2065 (sgnError env (UnboundSgn (loc, x));
adamc@83 2066 ((L'.SgnError, loc), []))
adamc@83 2067 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2068 | L.SgnFun (m, dom, ran) =>
adamc@41 2069 let
adamc@83 2070 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2071 val (env', n) = E.pushStrNamed env m dom'
adamc@83 2072 val (ran', gs2) = elabSgn (env', denv) ran
adamc@41 2073 in
adamc@83 2074 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2075 end
adamc@42 2076 | L.SgnWhere (sgn, x, c) =>
adamc@42 2077 let
adamc@83 2078 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2079 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2080 in
adamc@42 2081 case #1 (hnormSgn env sgn') of
adamc@83 2082 L'.SgnError => (sgnerror, [])
adamc@42 2083 | L'.SgnConst sgis =>
adamc@75 2084 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2085 x' = x andalso
adamc@75 2086 (unifyKinds k ck
adamc@75 2087 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2088 true)
adamc@42 2089 | _ => false) sgis then
adamc@83 2090 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2091 else
adamc@42 2092 (sgnError env (UnWhereable (sgn', x));
adamc@83 2093 (sgnerror, []))
adamc@42 2094 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2095 (sgnerror, []))
adamc@42 2096 end
adamc@59 2097 | L.SgnProj (m, ms, x) =>
adamc@59 2098 (case E.lookupStr env m of
adamc@59 2099 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2100 (sgnerror, []))
adamc@59 2101 | SOME (n, sgn) =>
adamc@59 2102 let
adamc@59 2103 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2104 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2105 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2106 (strerror, sgnerror))
adamc@59 2107 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2108 ((L'.StrVar n, loc), sgn) ms
adamc@59 2109 in
adamc@59 2110 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2111 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2112 (sgnerror, []))
adamc@83 2113 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2114 end)
adamc@59 2115
adamc@31 2116
adamc@66 2117 fun selfify env {str, strs, sgn} =
adamc@66 2118 case #1 (hnormSgn env sgn) of
adamc@66 2119 L'.SgnError => sgn
adamc@66 2120 | L'.SgnVar _ => sgn
adamc@66 2121
adamc@66 2122 | L'.SgnConst sgis =>
adamc@66 2123 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2124 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2125 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2126 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@66 2127 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2128 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2129 | x => x) sgis), #2 sgn)
adamc@66 2130 | L'.SgnFun _ => sgn
adamc@66 2131 | L'.SgnWhere _ => sgn
adamc@66 2132 | L'.SgnProj (m, ms, x) =>
adamc@66 2133 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2134 (L'.StrVar m, #2 sgn) ms,
adamc@66 2135 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2136 field = x} of
adamc@66 2137 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2138 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2139
adamc@66 2140 fun selfifyAt env {str, sgn} =
adamc@66 2141 let
adamc@66 2142 fun self (str, _) =
adamc@66 2143 case str of
adamc@66 2144 L'.StrVar x => SOME (x, [])
adamc@66 2145 | L'.StrProj (str, x) =>
adamc@66 2146 (case self str of
adamc@66 2147 NONE => NONE
adamc@66 2148 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2149 | _ => NONE
adamc@66 2150 in
adamc@66 2151 case self str of
adamc@66 2152 NONE => sgn
adamc@66 2153 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2154 end
adamc@66 2155
adamc@88 2156 fun dopen (env, denv) {str, strs, sgn} =
adamc@66 2157 let
adamc@66 2158 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2159 (L'.StrVar str, #2 sgn) strs
adamc@66 2160 in
adamc@66 2161 case #1 (hnormSgn env sgn) of
adamc@66 2162 L'.SgnConst sgis =>
adamc@88 2163 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
adamc@162 2164 let
adamc@162 2165 val d =
adamc@162 2166 case sgi of
adamc@162 2167 L'.SgiConAbs (x, n, k) =>
adamc@162 2168 let
adamc@162 2169 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2170 in
adamc@162 2171 (L'.DCon (x, n, k, c), loc)
adamc@162 2172 end
adamc@162 2173 | L'.SgiCon (x, n, k, c) =>
adamc@162 2174 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2175 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2176 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2177 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2178 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2179 | L'.SgiVal (x, n, t) =>
adamc@162 2180 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2181 | L'.SgiStr (x, n, sgn) =>
adamc@162 2182 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2183 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2184 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2185 | L'.SgiConstraint (c1, c2) =>
adamc@162 2186 (L'.DConstraint (c1, c2), loc)
adamc@205 2187 | L'.SgiTable (_, x, n, c) =>
adamc@210 2188 (L'.DVal (x, n, (L'.CApp (tableOf (), c), loc),
adamc@203 2189 (L'.EModProj (str, strs, x), loc)), loc)
adamc@211 2190 | L'.SgiClassAbs (x, n) =>
adamc@211 2191 let
adamc@211 2192 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2193 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2194 in
adamc@211 2195 (L'.DCon (x, n, k, c), loc)
adamc@211 2196 end
adamc@211 2197 | L'.SgiClass (x, n, _) =>
adamc@211 2198 let
adamc@211 2199 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2200 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2201 in
adamc@211 2202 (L'.DCon (x, n, k, c), loc)
adamc@211 2203 end
adamc@162 2204 in
adamc@162 2205 (d, (E.declBinds env' d, denv'))
adamc@162 2206 end)
adamc@88 2207 (env, denv) sgis
adamc@66 2208 | _ => (strError env (UnOpenable sgn);
adamc@88 2209 ([], (env, denv)))
adamc@66 2210 end
adamc@66 2211
adamc@88 2212 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@88 2213 case E.lookupStr env str of
adamc@88 2214 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2215 denv)
adamc@88 2216 | SOME (n, sgn) =>
adamc@88 2217 let
adamc@88 2218 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2219 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2220 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2221 (strerror, sgnerror))
adamc@88 2222 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2223 ((L'.StrVar n, loc), sgn) strs
adamc@88 2224
adamc@88 2225 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@88 2226
adamc@88 2227 val denv = case cso of
adamc@88 2228 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2229 denv)
adamc@90 2230 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@90 2231 let
adamc@90 2232 val (denv, gs) = D.assert env denv (c1, c2)
adamc@90 2233 in
adamc@90 2234 case gs of
adamc@90 2235 [] => ()
adamc@90 2236 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
adamc@90 2237
adamc@90 2238 denv
adamc@90 2239 end) denv cs
adamc@88 2240 in
adamc@88 2241 denv
adamc@88 2242 end
adamc@88 2243
adamc@31 2244 fun sgiOfDecl (d, loc) =
adamc@31 2245 case d of
adamc@123 2246 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2247 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2248 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2249 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2250 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2251 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2252 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2253 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2254 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2255 | L'.DExport _ => []
adamc@205 2256 | L'.DTable (tn, x, n, c) => [(L'.SgiTable (tn, x, n, c), loc)]
adamc@213 2257 | L'.DClass (x, n, c) => [(L'.SgiClass (x, n, c), loc)]
adamc@88 2258
adamc@88 2259 fun sgiBindsD (env, denv) (sgi, _) =
adamc@88 2260 case sgi of
adamc@90 2261 L'.SgiConstraint (c1, c2) =>
adamc@90 2262 (case D.assert env denv (c1, c2) of
adamc@90 2263 (denv, []) => denv
adamc@90 2264 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
adamc@88 2265 | _ => denv
adamc@31 2266
adamc@86 2267 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
adamc@35 2268 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2269 (L'.SgnError, _) => ()
adamc@31 2270 | (_, L'.SgnError) => ()
adamc@31 2271
adamc@31 2272 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2273 let
adamc@156 2274 fun folder (sgi2All as (sgi, loc), (env, denv)) =
adamc@31 2275 let
adamc@31 2276 fun seek p =
adamc@31 2277 let
adamc@88 2278 fun seek (env, denv) ls =
adamc@31 2279 case ls of
adamc@31 2280 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@88 2281 (env, denv))
adamc@31 2282 | h :: t =>
adamc@31 2283 case p h of
adamc@88 2284 NONE => seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
adamc@88 2285 | SOME envs => envs
adamc@31 2286 in
adamc@88 2287 seek (env, denv) sgis1
adamc@31 2288 end
adamc@31 2289 in
adamc@31 2290 case sgi of
adamc@31 2291 L'.SgiConAbs (x, n2, k2) =>
adamc@31 2292 seek (fn sgi1All as (sgi1, _) =>
adamc@31 2293 let
adamc@41 2294 fun found (x', n1, k1, co1) =
adamc@41 2295 if x = x' then
adamc@41 2296 let
adamc@41 2297 val () = unifyKinds k1 k2
adamc@41 2298 handle KUnify (k1, k2, err) =>
adamc@41 2299 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2300 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2301 in
adamc@41 2302 SOME (if n1 = n2 then
adamc@41 2303 env
adamc@41 2304 else
adamc@88 2305 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
adamc@88 2306 denv)
adamc@41 2307 end
adamc@41 2308 else
adamc@41 2309 NONE
adamc@31 2310 in
adamc@31 2311 case sgi1 of
adamc@41 2312 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2313 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2314 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2315 let
adamc@191 2316 val k = (L'.KType, loc)
adamc@191 2317 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2318 in
adamc@191 2319 found (x', n1, k', NONE)
adamc@191 2320 end
adamc@191 2321 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2322 let
adamc@191 2323 val k = (L'.KType, loc)
adamc@191 2324 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2325 in
adamc@191 2326 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2327 end
adamc@211 2328 | L'.SgiClassAbs (x', n1) => found (x', n1,
adamc@211 2329 (L'.KArrow ((L'.KType, loc),
adamc@211 2330 (L'.KType, loc)), loc),
adamc@211 2331 NONE)
adamc@211 2332 | L'.SgiClass (x', n1, c) => found (x', n1,
adamc@211 2333 (L'.KArrow ((L'.KType, loc),
adamc@211 2334 (L'.KType, loc)), loc),
adamc@211 2335 SOME c)
adamc@31 2336 | _ => NONE
adamc@31 2337 end)
adamc@31 2338
adamc@31 2339 | L'.SgiCon (x, n2, k2, c2) =>
adamc@31 2340 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2341 let
adamc@211 2342 fun found (x', n1, k1, c1) =
adamc@211 2343 if x = x' then
adamc@211 2344 let
adamc@211 2345 fun good () = SOME (E.pushCNamedAs env x n2 k2 (SOME c2), denv)
adamc@211 2346 in
adamc@211 2347 (case unifyCons (env, denv) c1 c2 of
adamc@211 2348 [] => good ()
adamc@211 2349 | _ => NONE)
adamc@211 2350 handle CUnify (c1, c2, err) =>
adamc@211 2351 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2352 good ())
adamc@211 2353 end
adamc@211 2354 else
adamc@211 2355 NONE
adamc@211 2356 in
adamc@211 2357 case sgi1 of
adamc@211 2358 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2359 | L'.SgiClass (x', n1, c1) =>
adamc@211 2360 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
adamc@211 2361 | _ => NONE
adamc@211 2362 end)
adamc@31 2363
adamc@191 2364 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@156 2365 seek (fn sgi1All as (sgi1, _) =>
adamc@160 2366 let
adamc@191 2367 fun found (n1, xs1, xncs1) =
adamc@160 2368 let
adamc@160 2369 fun mismatched ue =
adamc@160 2370 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@160 2371 SOME (env, denv))
adamc@156 2372
adamc@191 2373 val k = (L'.KType, loc)
adamc@191 2374 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2375
adamc@160 2376 fun good () =
adamc@160 2377 let
adamc@160 2378 val env = E.sgiBinds env sgi2All
adamc@160 2379 val env = if n1 = n2 then
adamc@160 2380 env
adamc@160 2381 else
adamc@160 2382 E.pushCNamedAs env x n1 (L'.KType, loc)
adamc@160 2383 (SOME (L'.CNamed n1, loc))
adamc@160 2384 in
adamc@160 2385 SOME (env, denv)
adamc@160 2386 end
adamc@156 2387
adamc@191 2388 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2389 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2390 String.compare (x1, x2) <> EQUAL
adamc@160 2391 orelse case (t1, t2) of
adamc@160 2392 (NONE, NONE) => false
adamc@160 2393 | (SOME t1, SOME t2) =>
adamc@160 2394 not (List.null (unifyCons (env, denv) t1 t2))
adamc@160 2395 | _ => true
adamc@160 2396 in
adamc@191 2397 (if xs1 <> xs2
adamc@191 2398 orelse length xncs1 <> length xncs2
adamc@160 2399 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2400 mismatched NONE
adamc@160 2401 else
adamc@160 2402 good ())
adamc@160 2403 handle CUnify ue => mismatched (SOME ue)
adamc@160 2404 end
adamc@160 2405 in
adamc@160 2406 case sgi1 of
adamc@191 2407 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2408 if x' = x then
adamc@191 2409 found (n1, xs, xncs1)
adamc@160 2410 else
adamc@160 2411 NONE
adamc@191 2412 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2413 if x' = x then
adamc@191 2414 found (n1, xs, xncs1)
adamc@162 2415 else
adamc@162 2416 NONE
adamc@160 2417 | _ => NONE
adamc@160 2418 end)
adamc@156 2419
adamc@191 2420 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@158 2421 seek (fn sgi1All as (sgi1, _) =>
adamc@158 2422 case sgi1 of
adamc@191 2423 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2424 if x = x' then
adamc@158 2425 let
adamc@158 2426 val k = (L'.KType, loc)
adamc@191 2427 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2428 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2429 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2430
adamc@158 2431 fun good () =
adamc@158 2432 let
adamc@191 2433 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2434 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2435 in
adamc@158 2436 SOME (env, denv)
adamc@158 2437 end
adamc@158 2438 in
adamc@158 2439 (case unifyCons (env, denv) t1 t2 of
adamc@158 2440 [] => good ()
adamc@158 2441 | _ => NONE)
adamc@158 2442 handle CUnify (c1, c2, err) =>
adamc@158 2443 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2444 good ())
adamc@158 2445 end
adamc@158 2446 else
adamc@158 2447 NONE
adamc@158 2448
adamc@158 2449 | _ => NONE)
adamc@156 2450
adamc@32 2451 | L'.SgiVal (x, n2, c2) =>
adamc@32 2452 seek (fn sgi1All as (sgi1, _) =>
adamc@32 2453 case sgi1 of
adamc@41 2454 L'.SgiVal (x', n1, c1) =>
adamc@41 2455 if x = x' then
adamc@86 2456 (case unifyCons (env, denv) c1 c2 of
adamc@88 2457 [] => SOME (env, denv)
adamc@86 2458 | _ => NONE)
adamc@86 2459 handle CUnify (c1, c2, err) =>
adamc@86 2460 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@88 2461 SOME (env, denv))
adamc@41 2462 else
adamc@41 2463 NONE
adamc@205 2464 | L'.SgiTable (_, x', n1, c1) =>
adamc@203 2465 if x = x' then
adamc@210 2466 (case unifyCons (env, denv) (L'.CApp (tableOf (), c1), loc) c2 of
adamc@203 2467 [] => SOME (env, denv)
adamc@203 2468 | _ => NONE)
adamc@203 2469 handle CUnify (c1, c2, err) =>
adamc@203 2470 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2471 SOME (env, denv))
adamc@203 2472 else
adamc@203 2473 NONE
adamc@32 2474 | _ => NONE)
adamc@32 2475
adamc@33 2476 | L'.SgiStr (x, n2, sgn2) =>
adamc@33 2477 seek (fn sgi1All as (sgi1, _) =>
adamc@33 2478 case sgi1 of
adamc@41 2479 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2480 if x = x' then
adamc@66 2481 let
adamc@86 2482 val () = subSgn (env, denv) sgn1 sgn2
adamc@66 2483 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2484 val env = if n1 = n2 then
adamc@66 2485 env
adamc@66 2486 else
adamc@66 2487 E.pushStrNamedAs env x n2
adamc@66 2488 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2489 sgn = sgn2})
adamc@66 2490 in
adamc@88 2491 SOME (env, denv)
adamc@66 2492 end
adamc@41 2493 else
adamc@41 2494 NONE
adamc@33 2495 | _ => NONE)
adamc@59 2496
adamc@59 2497 | L'.SgiSgn (x, n2, sgn2) =>
adamc@59 2498 seek (fn sgi1All as (sgi1, _) =>
adamc@59 2499 case sgi1 of
adamc@59 2500 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2501 if x = x' then
adamc@65 2502 let
adamc@86 2503 val () = subSgn (env, denv) sgn1 sgn2
adamc@86 2504 val () = subSgn (env, denv) sgn2 sgn1
adamc@65 2505
adamc@65 2506 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2507 val env = if n1 = n2 then
adamc@65 2508 env
adamc@65 2509 else
adamc@65 2510 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2511 in
adamc@88 2512 SOME (env, denv)
adamc@65 2513 end
adamc@59 2514 else
adamc@59 2515 NONE
adamc@59 2516 | _ => NONE)
adamc@88 2517
adamc@88 2518 | L'.SgiConstraint (c2, d2) =>
adamc@88 2519 seek (fn sgi1All as (sgi1, _) =>
adamc@88 2520 case sgi1 of
adamc@88 2521 L'.SgiConstraint (c1, d1) =>
adamc@88 2522 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
adamc@90 2523 let
adamc@90 2524 val (denv, gs) = D.assert env denv (c2, d2)
adamc@90 2525 in
adamc@90 2526 case gs of
adamc@90 2527 [] => ()
adamc@90 2528 | _ => raise Fail "subSgn: Sub-constraints remain";
adamc@90 2529
adamc@90 2530 SOME (env, denv)
adamc@90 2531 end
adamc@88 2532 else
adamc@88 2533 NONE
adamc@88 2534 | _ => NONE)
adamc@203 2535
adamc@205 2536 | L'.SgiTable (_, x, n2, c2) =>
adamc@203 2537 seek (fn sgi1All as (sgi1, _) =>
adamc@203 2538 case sgi1 of
adamc@205 2539 L'.SgiTable (_, x', n1, c1) =>
adamc@203 2540 if x = x' then
adamc@203 2541 (case unifyCons (env, denv) c1 c2 of
adamc@203 2542 [] => SOME (env, denv)
adamc@203 2543 | _ => NONE)
adamc@203 2544 handle CUnify (c1, c2, err) =>
adamc@203 2545 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2546 SOME (env, denv))
adamc@203 2547 else
adamc@203 2548 NONE
adamc@203 2549 | _ => NONE)
adamc@211 2550
adamc@211 2551 | L'.SgiClassAbs (x, n2) =>
adamc@211 2552 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2553 let
adamc@211 2554 fun found (x', n1, co) =
adamc@211 2555 if x = x' then
adamc@211 2556 let
adamc@211 2557 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2558 val env = E.pushCNamedAs env x n1 k co
adamc@211 2559 in
adamc@211 2560 SOME (if n1 = n2 then
adamc@211 2561 env
adamc@211 2562 else
adamc@211 2563 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
adamc@211 2564 denv)
adamc@211 2565 end
adamc@211 2566 else
adamc@211 2567 NONE
adamc@211 2568 in
adamc@211 2569 case sgi1 of
adamc@211 2570 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
adamc@211 2571 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
adamc@211 2572 | _ => NONE
adamc@211 2573 end)
adamc@211 2574 | L'.SgiClass (x, n2, c2) =>
adamc@211 2575 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2576 let
adamc@211 2577 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2578
adamc@211 2579 fun found (x', n1, c1) =
adamc@211 2580 if x = x' then
adamc@211 2581 let
adamc@211 2582 fun good () = SOME (E.pushCNamedAs env x n2 k (SOME c2), denv)
adamc@211 2583 in
adamc@211 2584 (case unifyCons (env, denv) c1 c2 of
adamc@211 2585 [] => good ()
adamc@211 2586 | _ => NONE)
adamc@211 2587 handle CUnify (c1, c2, err) =>
adamc@211 2588 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2589 good ())
adamc@211 2590 end
adamc@211 2591 else
adamc@211 2592 NONE
adamc@211 2593 in
adamc@211 2594 case sgi1 of
adamc@211 2595 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
adamc@211 2596 | _ => NONE
adamc@211 2597 end)
adamc@31 2598 end
adamc@31 2599 in
adamc@88 2600 ignore (foldl folder (env, denv) sgis2)
adamc@31 2601 end
adamc@31 2602
adamc@41 2603 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2604 let
adamc@43 2605 val ran1 =
adamc@43 2606 if n1 = n2 then
adamc@43 2607 ran1
adamc@43 2608 else
adamc@43 2609 subStrInSgn (n1, n2) ran1
adamc@43 2610 in
adamc@86 2611 subSgn (env, denv) dom2 dom1;
adamc@86 2612 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
adamc@43 2613 end
adamc@41 2614
adamc@41 2615 | _ => sgnError env (SgnWrongForm (sgn1, sgn2))
adamc@41 2616
adamc@61 2617
adamc@88 2618 fun elabDecl ((d, loc), (env, denv, gs)) =
adamc@76 2619 case d of
adamc@76 2620 L.DCon (x, ko, c) =>
adamc@76 2621 let
adamc@76 2622 val k' = case ko of
adamc@76 2623 NONE => kunif loc
adamc@76 2624 | SOME k => elabKind k
adamc@76 2625
adamc@83 2626 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 2627 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 2628 in
adamc@76 2629 checkKind env c' ck k';
adamc@76 2630
adamc@88 2631 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 2632 end
adamc@191 2633 | L.DDatatype (x, xs, xcs) =>
adamc@156 2634 let
adamc@156 2635 val k = (L'.KType, loc)
adamc@191 2636 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2637 val (env, n) = E.pushCNamed env x k' NONE
adamc@156 2638 val t = (L'.CNamed n, loc)
adamc@194 2639 val nxs = length xs - 1
adamc@194 2640 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@191 2641
adamc@191 2642 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@191 2643 (E.pushCRel env' x k,
adamc@191 2644 D.enter denv')) (env, denv) xs
adamc@156 2645
adamc@156 2646 val (xcs, (used, env, gs)) =
adamc@156 2647 ListUtil.foldlMap
adamc@156 2648 (fn ((x, to), (used, env, gs)) =>
adamc@156 2649 let
adamc@156 2650 val (to, t, gs') = case to of
adamc@156 2651 NONE => (NONE, t, gs)
adamc@156 2652 | SOME t' =>
adamc@156 2653 let
adamc@191 2654 val (t', tk, gs') = elabCon (env', denv') t'
adamc@156 2655 in
adamc@191 2656 checkKind env' t' tk k;
adamc@156 2657 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@156 2658 end
adamc@191 2659 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@156 2660
adamc@156 2661 val (env, n') = E.pushENamed env x t
adamc@156 2662 in
adamc@156 2663 if SS.member (used, x) then
adamc@156 2664 strError env (DuplicateConstructor (x, loc))
adamc@156 2665 else
adamc@156 2666 ();
adamc@156 2667 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@156 2668 end)
adamc@156 2669 (SS.empty, env, []) xcs
adamc@171 2670
adamc@191 2671 val env = E.pushDatatype env n xs xcs
adamc@156 2672 in
adamc@191 2673 ([(L'.DDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@156 2674 end
adamc@156 2675
adamc@157 2676 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@157 2677
adamc@157 2678 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@157 2679 (case E.lookupStr env m1 of
adamc@157 2680 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@157 2681 ([], (env, denv, gs)))
adamc@157 2682 | SOME (n, sgn) =>
adamc@157 2683 let
adamc@157 2684 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@157 2685 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@157 2686 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@157 2687 (strerror, sgnerror))
adamc@157 2688 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@157 2689 ((L'.StrVar n, loc), sgn) ms
adamc@157 2690 in
adamc@158 2691 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@158 2692 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@158 2693 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@158 2694 NONE => (conError env (UnboundDatatype (loc, s));
adamc@158 2695 ([], (env, denv, gs)))
adamc@191 2696 | SOME (xs, xncs) =>
adamc@158 2697 let
adamc@158 2698 val k = (L'.KType, loc)
adamc@191 2699 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2700 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 2701 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 2702 val env = E.pushDatatype env n' xs xncs
adamc@157 2703
adamc@158 2704 val t = (L'.CNamed n', loc)
adamc@158 2705 val env = foldl (fn ((x, n, to), env) =>
adamc@158 2706 let
adamc@158 2707 val t = case to of
adamc@158 2708 NONE => t
adamc@158 2709 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 2710
adamc@191 2711 val t = foldr (fn (x, t) =>
adamc@191 2712 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 2713 t xs
adamc@158 2714 in
adamc@158 2715 E.pushENamedAs env x n t
adamc@158 2716 end) env xncs
adamc@158 2717 in
adamc@191 2718 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@158 2719 end)
adamc@158 2720 | _ => (strError env (NotDatatype loc);
adamc@158 2721 ([], (env, denv, [])))
adamc@157 2722 end)
adamc@157 2723
adamc@76 2724 | L.DVal (x, co, e) =>
adamc@76 2725 let
adamc@123 2726 val (c', _, gs1) = case co of
adamc@83 2727 NONE => (cunif (loc, ktype), ktype, [])
adamc@83 2728 | SOME c => elabCon (env, denv) c
adamc@76 2729
adamc@83 2730 val (e', et, gs2) = elabExp (env, denv) e
adamc@76 2731 val (env', n) = E.pushENamed env x c'
adamc@86 2732
adamc@86 2733 val gs3 = checkCon (env, denv) e' et c'
adamc@76 2734 in
adamc@88 2735 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, gs1 @ gs2 @ gs3 @ gs))
adamc@76 2736 end
adamc@123 2737 | L.DValRec vis =>
adamc@123 2738 let
adamc@123 2739 val (vis, gs) = ListUtil.foldlMap
adamc@123 2740 (fn ((x, co, e), gs) =>
adamc@123 2741 let
adamc@123 2742 val (c', _, gs1) = case co of
adamc@123 2743 NONE => (cunif (loc, ktype), ktype, [])
adamc@123 2744 | SOME c => elabCon (env, denv) c
adamc@123 2745 in
adamc@123 2746 ((x, c', e), gs1 @ gs)
adamc@123 2747 end) [] vis
adamc@123 2748
adamc@123 2749 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@123 2750 let
adamc@123 2751 val (env, n) = E.pushENamed env x c'
adamc@123 2752 in
adamc@123 2753 ((x, n, c', e), env)
adamc@123 2754 end) env vis
adamc@123 2755
adamc@123 2756 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@123 2757 let
adamc@123 2758 val (e', et, gs1) = elabExp (env, denv) e
adamc@123 2759
adamc@123 2760 val gs2 = checkCon (env, denv) e' et c'
adamc@123 2761 in
adamc@123 2762 ((x, n, c', e'), gs1 @ gs2 @ gs)
adamc@123 2763 end) gs vis
adamc@123 2764 in
adamc@123 2765 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@123 2766 end
adamc@76 2767
adamc@76 2768 | L.DSgn (x, sgn) =>
adamc@76 2769 let
adamc@83 2770 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2771 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 2772 in
adamc@88 2773 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2774 end
adamc@76 2775
adamc@76 2776 | L.DStr (x, sgno, str) =>
adamc@76 2777 let
adamc@93 2778 val () = if x = "Basis" then
adamc@93 2779 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@93 2780 else
adamc@93 2781 ()
adamc@93 2782
adamc@83 2783 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@76 2784
adamc@83 2785 val (str', sgn', gs') =
adamc@78 2786 case formal of
adamc@78 2787 NONE =>
adamc@78 2788 let
adamc@83 2789 val (str', actual, ds) = elabStr (env, denv) str
adamc@78 2790 in
adamc@83 2791 (str', selfifyAt env {str = str', sgn = actual}, ds)
adamc@78 2792 end
adamc@83 2793 | SOME (formal, gs1) =>
adamc@78 2794 let
adamc@78 2795 val str =
adamc@78 2796 case #1 (hnormSgn env formal) of
adamc@78 2797 L'.SgnConst sgis =>
adamc@78 2798 (case #1 str of
adamc@78 2799 L.StrConst ds =>
adamc@78 2800 let
adamc@78 2801 val needed = foldl (fn ((sgi, _), needed) =>
adamc@78 2802 case sgi of
adamc@78 2803 L'.SgiConAbs (x, _, _) => SS.add (needed, x)
adamc@78 2804 | _ => needed)
adamc@78 2805 SS.empty sgis
adamc@78 2806
adamc@78 2807 val needed = foldl (fn ((d, _), needed) =>
adamc@78 2808 case d of
adamc@78 2809 L.DCon (x, _, _) => (SS.delete (needed, x)
adamc@78 2810 handle NotFound => needed)
adamc@78 2811 | L.DOpen _ => SS.empty
adamc@78 2812 | _ => needed)
adamc@78 2813 needed ds
adamc@78 2814 in
adamc@78 2815 case SS.listItems needed of
adamc@78 2816 [] => str
adamc@78 2817 | xs =>
adamc@78 2818 let
adamc@78 2819 val kwild = (L.KWild, #2 str)
adamc@78 2820 val cwild = (L.CWild kwild, #2 str)
adamc@78 2821 val ds' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
adamc@78 2822 in
adamc@78 2823 (L.StrConst (ds @ ds'), #2 str)
adamc@78 2824 end
adamc@78 2825 end
adamc@78 2826 | _ => str)
adamc@78 2827 | _ => str
adamc@78 2828
adamc@83 2829 val (str', actual, gs2) = elabStr (env, denv) str
adamc@78 2830 in
adamc@158 2831 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
adamc@83 2832 (str', formal, gs1 @ gs2)
adamc@78 2833 end
adamc@76 2834
adamc@76 2835 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2836 in
adamc@76 2837 case #1 (hnormSgn env sgn') of
adamc@76 2838 L'.SgnFun _ =>
adamc@76 2839 (case #1 str' of
adamc@76 2840 L'.StrFun _ => ()
adamc@76 2841 | _ => strError env (FunctorRebind loc))
adamc@76 2842 | _ => ();
adamc@76 2843
adamc@88 2844 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@76 2845 end
adamc@76 2846
adamc@76 2847 | L.DFfiStr (x, sgn) =>
adamc@76 2848 let
adamc@83 2849 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2850
adamc@76 2851 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2852 in
adamc@88 2853 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2854 end
adamc@76 2855
adamc@76 2856 | L.DOpen (m, ms) =>
adamc@88 2857 (case E.lookupStr env m of
adamc@88 2858 NONE => (strError env (UnboundStr (loc, m));
adamc@205 2859 ([], (env, denv, gs)))
adamc@88 2860 | SOME (n, sgn) =>
adamc@88 2861 let
adamc@88 2862 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2863 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2864 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2865 (strerror, sgnerror))
adamc@88 2866 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2867 ((L'.StrVar n, loc), sgn) ms
adamc@83 2868
adamc@88 2869 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
adamc@88 2870 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
adamc@88 2871 in
adamc@205 2872 (ds, (env', denv', gs))
adamc@88 2873 end)
adamc@88 2874
adamc@88 2875 | L.DConstraint (c1, c2) =>
adamc@88 2876 let
adamc@88 2877 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 2878 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@90 2879 val gs3 = D.prove env denv (c1', c2', loc)
adamc@88 2880
adamc@90 2881 val (denv', gs4) = D.assert env denv (c1', c2')
adamc@88 2882 in
adamc@88 2883 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 2884 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 2885
adamc@205 2886 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', gs1 @ gs2 @ gs3 @ gs4 @ gs))
adamc@88 2887 end
adamc@88 2888
adamc@88 2889 | L.DOpenConstraints (m, ms) =>
adamc@88 2890 let
adamc@88 2891 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@88 2892 in
adamc@205 2893 ([], (env, denv, gs))
adamc@88 2894 end
adamc@3 2895
adamc@109 2896 | L.DExport str =>
adamc@100 2897 let
adamc@205 2898 val (str', sgn, gs') = elabStr (env, denv) str
adamc@100 2899
adamc@109 2900 val sgn =
adamc@109 2901 case #1 (hnormSgn env sgn) of
adamc@109 2902 L'.SgnConst sgis =>
adamc@109 2903 let
adamc@146 2904 fun doOne (all as (sgi, _), env) =
adamc@146 2905 (case sgi of
adamc@146 2906 L'.SgiVal (x, n, t) =>
adamc@146 2907 (case hnormCon (env, denv) t of
adamc@146 2908 ((L'.TFun (dom, ran), _), []) =>
adamc@146 2909 (case (hnormCon (env, denv) dom, hnormCon (env, denv) ran) of
adamc@146 2910 (((L'.TRecord domR, _), []),
adamc@146 2911 ((L'.CApp (tf, arg3), _), [])) =>
adamc@146 2912 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
adamc@146 2913 (((L'.CApp (tf, arg2), _), []),
adamc@146 2914 (((L'.CRecord (_, []), _), []))) =>
adamc@146 2915 (case (hnormCon (env, denv) tf) of
adamc@146 2916 ((L'.CApp (tf, arg1), _), []) =>
adamc@146 2917 (case (hnormCon (env, denv) tf,
adamc@146 2918 hnormCon (env, denv) domR,
adamc@152 2919 hnormCon (env, denv) arg1,
adamc@146 2920 hnormCon (env, denv) arg2) of
adamc@152 2921 ((tf, []), (domR, []), (arg1, []),
adamc@146 2922 ((L'.CRecord (_, []), _), [])) =>
adamc@146 2923 let
adamc@146 2924 val t = (L'.CApp (tf, arg1), loc)
adamc@146 2925 val t = (L'.CApp (t, arg2), loc)
adamc@146 2926 val t = (L'.CApp (t, arg3), loc)
adamc@146 2927 in
adamc@146 2928 (L'.SgiVal (x, n, (L'.TFun ((L'.TRecord domR, loc),
adamc@146 2929 t),
adamc@146 2930 loc)), loc)
adamc@146 2931 end
adamc@146 2932 | _ => all)
adamc@146 2933 | _ => all)
adamc@146 2934 | _ => all)
adamc@146 2935 | _ => all)
adamc@146 2936 | _ => all)
adamc@146 2937 | _ => all,
adamc@146 2938 E.sgiBinds env all)
adamc@109 2939 in
adamc@146 2940 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@109 2941 end
adamc@109 2942 | _ => sgn
adamc@100 2943 in
adamc@205 2944 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@100 2945 end
adamc@100 2946
adamc@203 2947 | L.DTable (x, c) =>
adamc@203 2948 let
adamc@205 2949 val (c', k, gs') = elabCon (env, denv) c
adamc@210 2950 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 2951 in
adamc@203 2952 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 2953 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, gs' @ gs))
adamc@203 2954 end
adamc@203 2955
adamc@211 2956 | L.DClass (x, c) =>
adamc@211 2957 let
adamc@211 2958 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2959 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 2960 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 2961 val env = E.pushClass env n
adamc@211 2962 in
adamc@211 2963 checkKind env c' ck k;
adamc@213 2964 ([(L'.DClass (x, n, c'), loc)], (env, denv, []))
adamc@211 2965 end
adamc@211 2966
adamc@83 2967 and elabStr (env, denv) (str, loc) =
adamc@31 2968 case str of
adamc@31 2969 L.StrConst ds =>
adamc@31 2970 let
adamc@88 2971 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 2972 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 2973
adamc@63 2974 val (sgis, _, _, _, _) =
adamc@64 2975 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 2976 case sgi of
adamc@64 2977 L'.SgiConAbs (x, n, k) =>
adamc@64 2978 let
adamc@64 2979 val (cons, x) =
adamc@64 2980 if SS.member (cons, x) then
adamc@64 2981 (cons, "?" ^ x)
adamc@64 2982 else
adamc@64 2983 (SS.add (cons, x), x)
adamc@64 2984 in
adamc@64 2985 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 2986 end
adamc@64 2987 | L'.SgiCon (x, n, k, c) =>
adamc@64 2988 let
adamc@64 2989 val (cons, x) =
adamc@64 2990 if SS.member (cons, x) then
adamc@64 2991 (cons, "?" ^ x)
adamc@64 2992 else
adamc@64 2993 (SS.add (cons, x), x)
adamc@64 2994 in
adamc@64 2995 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 2996 end
adamc@191 2997 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 2998 let
adamc@156 2999 val (cons, x) =
adamc@156 3000 if SS.member (cons, x) then
adamc@156 3001 (cons, "?" ^ x)
adamc@156 3002 else
adamc@156 3003 (SS.add (cons, x), x)
adamc@156 3004
adamc@156 3005 val (xncs, vals) =
adamc@156 3006 ListUtil.foldlMap
adamc@156 3007 (fn ((x, n, t), vals) =>
adamc@156 3008 if SS.member (vals, x) then
adamc@156 3009 (("?" ^ x, n, t), vals)
adamc@156 3010 else
adamc@156 3011 ((x, n, t), SS.add (vals, x)))
adamc@156 3012 vals xncs
adamc@156 3013 in
adamc@191 3014 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3015 end
adamc@191 3016 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 3017 let
adamc@156 3018 val (cons, x) =
adamc@156 3019 if SS.member (cons, x) then
adamc@156 3020 (cons, "?" ^ x)
adamc@156 3021 else
adamc@156 3022 (SS.add (cons, x), x)
adamc@156 3023 in
adamc@191 3024 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3025 end
adamc@64 3026 | L'.SgiVal (x, n, c) =>
adamc@64 3027 let
adamc@64 3028 val (vals, x) =
adamc@64 3029 if SS.member (vals, x) then
adamc@64 3030 (vals, "?" ^ x)
adamc@64 3031 else
adamc@64 3032 (SS.add (vals, x), x)
adamc@64 3033 in
adamc@64 3034 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3035 end
adamc@64 3036 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3037 let
adamc@64 3038 val (sgns, x) =
adamc@64 3039 if SS.member (sgns, x) then
adamc@64 3040 (sgns, "?" ^ x)
adamc@64 3041 else
adamc@64 3042 (SS.add (sgns, x), x)
adamc@64 3043 in
adamc@64 3044 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3045 end
adamc@64 3046
adamc@64 3047 | L'.SgiStr (x, n, sgn) =>
adamc@64 3048 let
adamc@64 3049 val (strs, x) =
adamc@64 3050 if SS.member (strs, x) then
adamc@64 3051 (strs, "?" ^ x)
adamc@64 3052 else
adamc@64 3053 (SS.add (strs, x), x)
adamc@64 3054 in
adamc@64 3055 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3056 end
adamc@203 3057 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@205 3058 | L'.SgiTable (tn, x, n, c) =>
adamc@203 3059 let
adamc@203 3060 val (vals, x) =
adamc@203 3061 if SS.member (vals, x) then
adamc@203 3062 (vals, "?" ^ x)
adamc@203 3063 else
adamc@203 3064 (SS.add (vals, x), x)
adamc@203 3065 in
adamc@205 3066 ((L'.SgiTable (tn, x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3067 end
adamc@211 3068 | L'.SgiClassAbs (x, n) =>
adamc@211 3069 let
adamc@211 3070 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3071
adamc@211 3072 val (cons, x) =
adamc@211 3073 if SS.member (cons, x) then
adamc@211 3074 (cons, "?" ^ x)
adamc@211 3075 else
adamc@211 3076 (SS.add (cons, x), x)
adamc@211 3077 in
adamc@211 3078 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3079 end
adamc@211 3080 | L'.SgiClass (x, n, c) =>
adamc@211 3081 let
adamc@211 3082 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3083
adamc@211 3084 val (cons, x) =
adamc@211 3085 if SS.member (cons, x) then
adamc@211 3086 (cons, "?" ^ x)
adamc@211 3087 else
adamc@211 3088 (SS.add (cons, x), x)
adamc@211 3089 in
adamc@211 3090 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3091 end)
adamc@64 3092
adamc@63 3093 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3094 in
adamc@83 3095 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3096 end
adamc@31 3097 | L.StrVar x =>
adamc@31 3098 (case E.lookupStr env x of
adamc@31 3099 NONE =>
adamc@31 3100 (strError env (UnboundStr (loc, x));
adamc@83 3101 (strerror, sgnerror, []))
adamc@83 3102 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3103 | L.StrProj (str, x) =>
adamc@34 3104 let
adamc@83 3105 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3106 in
adamc@34 3107 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3108 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3109 (strerror, sgnerror, []))
adamc@83 3110 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3111 end
adamc@41 3112 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3113 let
adamc@83 3114 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3115 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3116 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3117
adamc@83 3118 val (formal, gs3) =
adamc@41 3119 case ranO of
adamc@83 3120 NONE => (actual, [])
adamc@41 3121 | SOME ran =>
adamc@41 3122 let
adamc@83 3123 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3124 in
adamc@86 3125 subSgn (env', denv) actual ran';
adamc@83 3126 (ran', gs)
adamc@41 3127 end
adamc@41 3128 in
adamc@41 3129 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3130 (L'.SgnFun (m, n, dom', formal), loc),
adamc@83 3131 gs1 @ gs2 @ gs3)
adamc@41 3132 end
adamc@44 3133 | L.StrApp (str1, str2) =>
adamc@44 3134 let
adamc@83 3135 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@83 3136 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3137 in
adamc@44 3138 case #1 (hnormSgn env sgn1) of
adamc@83 3139 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3140 | L'.SgnFun (m, n, dom, ran) =>
adamc@86 3141 (subSgn (env, denv) sgn2 dom;
adamc@44 3142 case #1 (hnormSgn env ran) of
adamc@83 3143 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3144 | L'.SgnConst sgis =>
adamc@44 3145 ((L'.StrApp (str1', str2'), loc),
adamc@83 3146 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3147 gs1 @ gs2)
adamc@44 3148 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3149 | _ => (strError env (NotFunctor sgn1);
adamc@83 3150 (strerror, sgnerror, []))
adamc@44 3151 end
adamc@31 3152
adamc@56 3153 fun elabFile basis env file =
adamc@56 3154 let
adamc@83 3155 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3156 val () = case gs of
adamc@83 3157 [] => ()
adamc@207 3158 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3159 prefaces "Unresolved"
adamc@207 3160 [("c1", p_con env c1),
adamc@207 3161 ("c2", p_con env c2)]) gs;
adamc@207 3162 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3163
adamc@56 3164 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3165 val () = basis_r := basis_n
adamc@56 3166
adamc@88 3167 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
adamc@56 3168
adamc@56 3169 fun discoverC r x =
adamc@56 3170 case E.lookupC env' x of
adamc@56 3171 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3172 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3173 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3174
adamc@56 3175 val () = discoverC int "int"
adamc@56 3176 val () = discoverC float "float"
adamc@56 3177 val () = discoverC string "string"
adamc@203 3178 val () = discoverC table "sql_table"
adamc@56 3179
adamc@83 3180 fun elabDecl' (d, (env, gs)) =
adamc@76 3181 let
adamc@76 3182 val () = resetKunif ()
adamc@76 3183 val () = resetCunif ()
adamc@88 3184 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3185 in
adamc@76 3186 if ErrorMsg.anyErrors () then
adamc@76 3187 ()
adamc@76 3188 else (
adamc@76 3189 if List.exists kunifsInDecl ds then
adamc@91 3190 declError env (KunifsRemain ds)
adamc@76 3191 else
adamc@76 3192 ();
adamc@76 3193
adamc@76 3194 case ListUtil.search cunifsInDecl ds of
adamc@76 3195 NONE => ()
adamc@76 3196 | SOME loc =>
adamc@91 3197 declError env (CunifsRemain ds)
adamc@76 3198 );
adamc@76 3199
adamc@83 3200 (ds, (env, gs))
adamc@76 3201 end
adamc@76 3202
adamc@83 3203 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3204 in
adamc@84 3205 if ErrorMsg.anyErrors () then
adamc@84 3206 ()
adamc@84 3207 else
adamc@90 3208 app (fn (loc, env, denv, c1, c2) =>
adamc@84 3209 case D.prove env denv (c1, c2, loc) of
adamc@84 3210 [] => ()
adamc@84 3211 | _ =>
adamc@86 3212 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@84 3213 eprefaces' [("Con 1", p_con env c1),
adamc@90 3214 ("Con 2", p_con env c2),
adamc@90 3215 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@90 3216 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))])) gs;
adamc@83 3217
adamc@56 3218 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan) :: ds @ file
adamc@56 3219 end
adamc@2 3220
adamc@2 3221 end