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annotate src/elaborate.sml @ 211:e86411f647c6

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Initial type class support
author Adam Chlipala <adamc@hcoop.net>
date Sat, 16 Aug 2008 14:32:18 -0400
parents f4033abd6ab1
children 0343557355fc
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@92 1376 fun elabExp (env, denv) (eAll as (e, loc)) =
adamc@91 1377 let
adamc@92 1378
adamc@92 1379 in
adamc@92 1380 (*eprefaces "elabExp" [("eAll", SourcePrint.p_exp eAll)];*)
adamc@10 1381
adamc@91 1382 case e of
adamc@91 1383 L.EAnnot (e, t) =>
adamc@91 1384 let
adamc@91 1385 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1386 val (t', _, gs2) = elabCon (env, denv) t
adamc@91 1387 val gs3 = checkCon (env, denv) e' et t'
adamc@91 1388 in
adamc@91 1389 (e', t', gs1 @ gs2 @ gs3)
adamc@91 1390 end
adamc@34 1391
adamc@91 1392 | L.EPrim p => ((L'.EPrim p, loc), primType env p, [])
adamc@91 1393 | L.EVar ([], s) =>
adamc@91 1394 (case E.lookupE env s of
adamc@91 1395 E.NotBound =>
adamc@91 1396 (expError env (UnboundExp (loc, s));
adamc@91 1397 (eerror, cerror, []))
adamc@91 1398 | E.Rel (n, t) => ((L'.ERel n, loc), t, [])
adamc@191 1399 | E.Named (n, t) =>
adamc@191 1400 if Char.isUpper (String.sub (s, 0)) then
adamc@191 1401 elabHead (env, denv) (L'.ENamed n, loc) t
adamc@191 1402 else
adamc@191 1403 ((L'.ENamed n, loc), t, []))
adamc@91 1404 | L.EVar (m1 :: ms, s) =>
adamc@91 1405 (case E.lookupStr env m1 of
adamc@91 1406 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@91 1407 (eerror, cerror, []))
adamc@91 1408 | SOME (n, sgn) =>
adamc@91 1409 let
adamc@91 1410 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@91 1411 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@91 1412 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@91 1413 (strerror, sgnerror))
adamc@91 1414 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@91 1415 ((L'.StrVar n, loc), sgn) ms
adamc@10 1416
adamc@91 1417 val t = case E.projectVal env {sgn = sgn, str = str, field = s} of
adamc@91 1418 NONE => (expError env (UnboundExp (loc, s));
adamc@91 1419 cerror)
adamc@91 1420 | SOME t => t
adamc@91 1421 in
adamc@91 1422 ((L'.EModProj (n, ms, s), loc), t, [])
adamc@91 1423 end)
adamc@86 1424
adamc@211 1425 | L.EApp (e1, (L.EWild, _)) =>
adamc@210 1426 let
adamc@210 1427 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@210 1428 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@210 1429 val (t1, gs3) = hnormCon (env, denv) t1
adamc@210 1430 in
adamc@210 1431 case t1 of
adamc@211 1432 (L'.TFun (dom, ran), _) =>
adamc@211 1433 (case E.resolveClass env dom of
adamc@211 1434 NONE => (expError env (Unresolvable (loc, dom));
adamc@211 1435 (eerror, cerror, []))
adamc@211 1436 | SOME pf => ((L'.EApp (e1', pf), loc), ran, gs1 @ gs2 @ gs3))
adamc@211 1437 | _ => (expError env (OutOfContext loc);
adamc@211 1438 (eerror, cerror, []))
adamc@210 1439 end
adamc@211 1440 | L.EWild => (expError env (OutOfContext loc);
adamc@211 1441 (eerror, cerror, []))
adamc@210 1442
adamc@91 1443 | L.EApp (e1, e2) =>
adamc@91 1444 let
adamc@91 1445 val (e1', t1, gs1) = elabExp (env, denv) e1
adamc@91 1446 val (e1', t1, gs2) = elabHead (env, denv) e1' t1
adamc@91 1447 val (e2', t2, gs3) = elabExp (env, denv) e2
adamc@71 1448
adamc@91 1449 val dom = cunif (loc, ktype)
adamc@91 1450 val ran = cunif (loc, ktype)
adamc@91 1451 val t = (L'.TFun (dom, ran), dummy)
adamc@91 1452
adamc@91 1453 val gs4 = checkCon (env, denv) e1' t1 t
adamc@91 1454 val gs5 = checkCon (env, denv) e2' t2 dom
adamc@205 1455
adamc@205 1456 val gs = gs1 @ gs2 @ gs3 @ gs4 @ gs5
adamc@91 1457 in
adamc@205 1458 ((L'.EApp (e1', e2'), loc), ran, gs)
adamc@91 1459 end
adamc@91 1460 | L.EAbs (x, to, e) =>
adamc@91 1461 let
adamc@91 1462 val (t', gs1) = case to of
adamc@91 1463 NONE => (cunif (loc, ktype), [])
adamc@91 1464 | SOME t =>
adamc@91 1465 let
adamc@91 1466 val (t', tk, gs) = elabCon (env, denv) t
adamc@91 1467 in
adamc@91 1468 checkKind env t' tk ktype;
adamc@91 1469 (t', gs)
adamc@91 1470 end
adamc@91 1471 val (e', et, gs2) = elabExp (E.pushERel env x t', denv) e
adamc@91 1472 in
adamc@91 1473 ((L'.EAbs (x, t', et, e'), loc),
adamc@91 1474 (L'.TFun (t', et), loc),
adamc@91 1475 gs1 @ gs2)
adamc@91 1476 end
adamc@91 1477 | L.ECApp (e, c) =>
adamc@91 1478 let
adamc@91 1479 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1480 val (e', et, gs2) = elabHead (env, denv) e' et
adamc@91 1481 val (c', ck, gs3) = elabCon (env, denv) c
adamc@91 1482 val ((et', _), gs4) = hnormCon (env, denv) et
adamc@91 1483 in
adamc@91 1484 case et' of
adamc@91 1485 L'.CError => (eerror, cerror, [])
adamc@91 1486 | L'.TCFun (_, _, k, eb) =>
adamc@91 1487 let
adamc@91 1488 val () = checkKind env c' ck k
adamc@91 1489 val eb' = subConInCon (0, c') eb
adamc@91 1490 handle SynUnif => (expError env (Unif ("substitution", eb));
adamc@91 1491 cerror)
adamc@91 1492 in
adamc@91 1493 ((L'.ECApp (e', c'), loc), eb', gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1494 end
adamc@91 1495
adamc@91 1496 | L'.CUnif _ =>
adamc@91 1497 (expError env (Unif ("application", et));
adamc@91 1498 (eerror, cerror, []))
adamc@91 1499
adamc@91 1500 | _ =>
adamc@91 1501 (expError env (WrongForm ("constructor function", e', et));
adamc@91 1502 (eerror, cerror, []))
adamc@91 1503 end
adamc@91 1504 | L.ECAbs (expl, x, k, e) =>
adamc@91 1505 let
adamc@91 1506 val expl' = elabExplicitness expl
adamc@91 1507 val k' = elabKind k
adamc@91 1508 val (e', et, gs) = elabExp (E.pushCRel env x k', D.enter denv) e
adamc@91 1509 in
adamc@91 1510 ((L'.ECAbs (expl', x, k', e'), loc),
adamc@91 1511 (L'.TCFun (expl', x, k', et), loc),
adamc@91 1512 gs)
adamc@91 1513 end
adamc@91 1514
adamc@91 1515 | L.EDisjoint (c1, c2, e) =>
adamc@91 1516 let
adamc@91 1517 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@91 1518 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@91 1519
adamc@91 1520 val ku1 = kunif loc
adamc@91 1521 val ku2 = kunif loc
adamc@91 1522
adamc@91 1523 val (denv', gs3) = D.assert env denv (c1', c2')
adamc@91 1524 val (e', t, gs4) = elabExp (env, denv') e
adamc@91 1525 in
adamc@91 1526 checkKind env c1' k1 (L'.KRecord ku1, loc);
adamc@91 1527 checkKind env c2' k2 (L'.KRecord ku2, loc);
adamc@91 1528
adamc@91 1529 (e', (L'.TDisjoint (c1', c2', t), loc), gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1530 end
adamc@91 1531
adamc@91 1532 | L.ERecord xes =>
adamc@91 1533 let
adamc@91 1534 val (xes', gs) = ListUtil.foldlMap (fn ((x, e), gs) =>
adamc@91 1535 let
adamc@91 1536 val (x', xk, gs1) = elabCon (env, denv) x
adamc@91 1537 val (e', et, gs2) = elabExp (env, denv) e
adamc@91 1538 in
adamc@91 1539 checkKind env x' xk kname;
adamc@91 1540 ((x', e', et), gs1 @ gs2 @ gs)
adamc@91 1541 end)
adamc@91 1542 [] xes
adamc@91 1543
adamc@91 1544 val k = (L'.KType, loc)
adamc@91 1545
adamc@91 1546 fun prove (xets, gs) =
adamc@91 1547 case xets of
adamc@91 1548 [] => gs
adamc@91 1549 | (x, _, t) :: rest =>
adamc@91 1550 let
adamc@91 1551 val xc = (x, t)
adamc@91 1552 val r1 = (L'.CRecord (k, [xc]), loc)
adamc@91 1553 val gs = foldl (fn ((x', _, t'), gs) =>
adamc@91 1554 let
adamc@91 1555 val xc' = (x', t')
adamc@91 1556 val r2 = (L'.CRecord (k, [xc']), loc)
adamc@91 1557 in
adamc@91 1558 D.prove env denv (r1, r2, loc) @ gs
adamc@91 1559 end)
adamc@91 1560 gs rest
adamc@91 1561 in
adamc@91 1562 prove (rest, gs)
adamc@91 1563 end
adamc@91 1564 in
adamc@91 1565 ((L'.ERecord xes', loc),
adamc@91 1566 (L'.TRecord (L'.CRecord (ktype, map (fn (x', _, et) => (x', et)) xes'), loc), loc),
adamc@91 1567 prove (xes', gs))
adamc@91 1568 end
adamc@91 1569
adamc@91 1570 | L.EField (e, c) =>
adamc@91 1571 let
adamc@91 1572 val (e', et, gs1) = elabExp (env, denv) e
adamc@91 1573 val (c', ck, gs2) = elabCon (env, denv) c
adamc@91 1574
adamc@91 1575 val ft = cunif (loc, ktype)
adamc@91 1576 val rest = cunif (loc, ktype_record)
adamc@91 1577 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@91 1578
adamc@91 1579 val gs3 =
adamc@91 1580 checkCon (env, denv) e' et
adamc@91 1581 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@91 1582 val gs4 = D.prove env denv (first, rest, loc)
adamc@91 1583 in
adamc@91 1584 ((L'.EField (e', c', {field = ft, rest = rest}), loc), ft, gs1 @ gs2 @ gs3 @ gs4)
adamc@91 1585 end
adamc@91 1586
adamc@149 1587 | L.ECut (e, c) =>
adamc@149 1588 let
adamc@149 1589 val (e', et, gs1) = elabExp (env, denv) e
adamc@149 1590 val (c', ck, gs2) = elabCon (env, denv) c
adamc@149 1591
adamc@149 1592 val ft = cunif (loc, ktype)
adamc@149 1593 val rest = cunif (loc, ktype_record)
adamc@149 1594 val first = (L'.CRecord (ktype, [(c', ft)]), loc)
adamc@149 1595
adamc@149 1596 val gs3 =
adamc@149 1597 checkCon (env, denv) e' et
adamc@149 1598 (L'.TRecord (L'.CConcat (first, rest), loc), loc)
adamc@149 1599 val gs4 = D.prove env denv (first, rest, loc)
adamc@149 1600 in
adamc@149 1601 ((L'.ECut (e', c', {field = ft, rest = rest}), loc), (L'.TRecord rest, loc), gs1 @ gs2 @ gs3 @ gs4)
adamc@149 1602 end
adamc@149 1603
adamc@91 1604 | L.EFold =>
adamc@91 1605 let
adamc@91 1606 val dom = kunif loc
adamc@91 1607 in
adamc@91 1608 ((L'.EFold dom, loc), foldType (dom, loc), [])
adamc@91 1609 end
adamc@170 1610
adamc@171 1611 | L.ECase (e, pes) =>
adamc@171 1612 let
adamc@171 1613 val (e', et, gs1) = elabExp (env, denv) e
adamc@171 1614 val result = cunif (loc, (L'.KType, loc))
adamc@171 1615 val (pes', gs) = ListUtil.foldlMap
adamc@171 1616 (fn ((p, e), gs) =>
adamc@171 1617 let
adamc@174 1618 val ((p', pt), (env, _)) = elabPat (p, (env, denv, SS.empty))
adamc@171 1619
adamc@171 1620 val gs1 = checkPatCon (env, denv) p' pt et
adamc@171 1621 val (e', et, gs2) = elabExp (env, denv) e
adamc@171 1622 val gs3 = checkCon (env, denv) e' et result
adamc@171 1623 in
adamc@171 1624 ((p', e'), gs1 @ gs2 @ gs3 @ gs)
adamc@171 1625 end)
adamc@171 1626 gs1 pes
adamc@172 1627
adamc@172 1628 val (total, gs') = exhaustive (env, denv, et, map #1 pes')
adamc@171 1629 in
adamc@172 1630 if total then
adamc@172 1631 ()
adamc@172 1632 else
adamc@172 1633 expError env (Inexhaustive loc);
adamc@172 1634
adamc@182 1635 ((L'.ECase (e', pes', {disc = et, result = result}), loc), result, gs' @ gs)
adamc@171 1636 end
adamc@91 1637 end
adamc@12 1638
adamc@12 1639
adamc@6 1640 datatype decl_error =
adamc@91 1641 KunifsRemain of L'.decl list
adamc@91 1642 | CunifsRemain of L'.decl list
adamc@91 1643
adamc@91 1644 fun lspan [] = ErrorMsg.dummySpan
adamc@91 1645 | lspan ((_, loc) :: _) = loc
adamc@6 1646
adamc@6 1647 fun declError env err =
adamc@6 1648 case err of
adamc@91 1649 KunifsRemain ds =>
adamc@91 1650 (ErrorMsg.errorAt (lspan ds) "Some kind unification variables are undetermined in declaration";
adamc@91 1651 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
adamc@91 1652 | CunifsRemain ds =>
adamc@91 1653 (ErrorMsg.errorAt (lspan ds) "Some constructor unification variables are undetermined in declaration";
adamc@91 1654 eprefaces' [("Decl", p_list_sep PD.newline (p_decl env) ds)])
adamc@6 1655
adamc@31 1656 datatype sgn_error =
adamc@31 1657 UnboundSgn of ErrorMsg.span * string
adamc@31 1658 | UnmatchedSgi of L'.sgn_item
adamc@31 1659 | SgiWrongKind of L'.sgn_item * L'.kind * L'.sgn_item * L'.kind * kunify_error
adamc@31 1660 | SgiWrongCon of L'.sgn_item * L'.con * L'.sgn_item * L'.con * cunify_error
adamc@156 1661 | SgiMismatchedDatatypes of L'.sgn_item * L'.sgn_item * (L'.con * L'.con * cunify_error) option
adamc@41 1662 | SgnWrongForm of L'.sgn * L'.sgn
adamc@42 1663 | UnWhereable of L'.sgn * string
adamc@75 1664 | WhereWrongKind of L'.kind * L'.kind * kunify_error
adamc@58 1665 | NotIncludable of L'.sgn
adamc@62 1666 | DuplicateCon of ErrorMsg.span * string
adamc@62 1667 | DuplicateVal of ErrorMsg.span * string
adamc@62 1668 | DuplicateSgn of ErrorMsg.span * string
adamc@62 1669 | DuplicateStr of ErrorMsg.span * string
adamc@88 1670 | NotConstraintsable of L'.sgn
adamc@31 1671
adamc@31 1672 fun sgnError env err =
adamc@31 1673 case err of
adamc@31 1674 UnboundSgn (loc, s) =>
adamc@31 1675 ErrorMsg.errorAt loc ("Unbound signature variable " ^ s)
adamc@31 1676 | UnmatchedSgi (sgi as (_, loc)) =>
adamc@31 1677 (ErrorMsg.errorAt loc "Unmatched signature item";
adamc@31 1678 eprefaces' [("Item", p_sgn_item env sgi)])
adamc@31 1679 | SgiWrongKind (sgi1, k1, sgi2, k2, kerr) =>
adamc@31 1680 (ErrorMsg.errorAt (#2 sgi1) "Kind unification failure in signature matching:";
adamc@59 1681 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@59 1682 ("Need", p_sgn_item env sgi2),
adamc@31 1683 ("Kind 1", p_kind k1),
adamc@31 1684 ("Kind 2", p_kind k2)];
adamc@31 1685 kunifyError kerr)
adamc@31 1686 | SgiWrongCon (sgi1, c1, sgi2, c2, cerr) =>
adamc@31 1687 (ErrorMsg.errorAt (#2 sgi1) "Constructor unification failure in signature matching:";
adamc@59 1688 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@59 1689 ("Need", p_sgn_item env sgi2),
adamc@31 1690 ("Con 1", p_con env c1),
adamc@31 1691 ("Con 2", p_con env c2)];
adamc@31 1692 cunifyError env cerr)
adamc@156 1693 | SgiMismatchedDatatypes (sgi1, sgi2, cerro) =>
adamc@156 1694 (ErrorMsg.errorAt (#2 sgi1) "Mismatched 'datatype' specifications:";
adamc@156 1695 eprefaces' [("Have", p_sgn_item env sgi1),
adamc@156 1696 ("Need", p_sgn_item env sgi2)];
adamc@156 1697 Option.app (fn (c1, c2, ue) =>
adamc@156 1698 (eprefaces "Unification error"
adamc@156 1699 [("Con 1", p_con env c1),
adamc@156 1700 ("Con 2", p_con env c2)];
adamc@156 1701 cunifyError env ue)) cerro)
adamc@41 1702 | SgnWrongForm (sgn1, sgn2) =>
adamc@41 1703 (ErrorMsg.errorAt (#2 sgn1) "Incompatible signatures:";
adamc@41 1704 eprefaces' [("Sig 1", p_sgn env sgn1),
adamc@41 1705 ("Sig 2", p_sgn env sgn2)])
adamc@42 1706 | UnWhereable (sgn, x) =>
adamc@42 1707 (ErrorMsg.errorAt (#2 sgn) "Unavailable field for 'where'";
adamc@42 1708 eprefaces' [("Signature", p_sgn env sgn),
adamc@42 1709 ("Field", PD.string x)])
adamc@75 1710 | WhereWrongKind (k1, k2, kerr) =>
adamc@75 1711 (ErrorMsg.errorAt (#2 k1) "Wrong kind for 'where'";
adamc@75 1712 eprefaces' [("Have", p_kind k1),
adamc@75 1713 ("Need", p_kind k2)];
adamc@75 1714 kunifyError kerr)
adamc@58 1715 | NotIncludable sgn =>
adamc@58 1716 (ErrorMsg.errorAt (#2 sgn) "Invalid signature to 'include'";
adamc@58 1717 eprefaces' [("Signature", p_sgn env sgn)])
adamc@62 1718 | DuplicateCon (loc, s) =>
adamc@62 1719 ErrorMsg.errorAt loc ("Duplicate constructor " ^ s ^ " in signature")
adamc@62 1720 | DuplicateVal (loc, s) =>
adamc@62 1721 ErrorMsg.errorAt loc ("Duplicate value " ^ s ^ " in signature")
adamc@62 1722 | DuplicateSgn (loc, s) =>
adamc@62 1723 ErrorMsg.errorAt loc ("Duplicate signature " ^ s ^ " in signature")
adamc@62 1724 | DuplicateStr (loc, s) =>
adamc@62 1725 ErrorMsg.errorAt loc ("Duplicate structure " ^ s ^ " in signature")
adamc@88 1726 | NotConstraintsable sgn =>
adamc@88 1727 (ErrorMsg.errorAt (#2 sgn) "Invalid signature for 'open constraints'";
adamc@88 1728 eprefaces' [("Signature", p_sgn env sgn)])
adamc@31 1729
adamc@31 1730 datatype str_error =
adamc@31 1731 UnboundStr of ErrorMsg.span * string
adamc@44 1732 | NotFunctor of L'.sgn
adamc@46 1733 | FunctorRebind of ErrorMsg.span
adamc@61 1734 | UnOpenable of L'.sgn
adamc@75 1735 | NotType of L'.kind * (L'.kind * L'.kind * kunify_error)
adamc@156 1736 | DuplicateConstructor of string * ErrorMsg.span
adamc@158 1737 | NotDatatype of ErrorMsg.span
adamc@31 1738
adamc@31 1739 fun strError env err =
adamc@31 1740 case err of
adamc@31 1741 UnboundStr (loc, s) =>
adamc@31 1742 ErrorMsg.errorAt loc ("Unbound structure variable " ^ s)
adamc@44 1743 | NotFunctor sgn =>
adamc@44 1744 (ErrorMsg.errorAt (#2 sgn) "Application of non-functor";
adamc@44 1745 eprefaces' [("Signature", p_sgn env sgn)])
adamc@46 1746 | FunctorRebind loc =>
adamc@46 1747 ErrorMsg.errorAt loc "Attempt to rebind functor"
adamc@61 1748 | UnOpenable sgn =>
adamc@61 1749 (ErrorMsg.errorAt (#2 sgn) "Un-openable structure";
adamc@61 1750 eprefaces' [("Signature", p_sgn env sgn)])
adamc@75 1751 | NotType (k, (k1, k2, ue)) =>
adamc@75 1752 (ErrorMsg.errorAt (#2 k) "'val' type kind is not 'Type'";
adamc@75 1753 eprefaces' [("Kind", p_kind k),
adamc@75 1754 ("Subkind 1", p_kind k1),
adamc@75 1755 ("Subkind 2", p_kind k2)];
adamc@75 1756 kunifyError ue)
adamc@156 1757 | DuplicateConstructor (x, loc) =>
adamc@156 1758 ErrorMsg.errorAt loc ("Duplicate datatype constructor " ^ x)
adamc@158 1759 | NotDatatype loc =>
adamc@158 1760 ErrorMsg.errorAt loc "Trying to import non-datatype as a datatype"
adamc@31 1761
adamc@42 1762 val hnormSgn = E.hnormSgn
adamc@31 1763
adamc@210 1764 fun tableOf () = (L'.CModProj (!basis_r, [], "sql_table"), ErrorMsg.dummySpan)
adamc@205 1765
adamc@88 1766 fun elabSgn_item ((sgi, loc), (env, denv, gs)) =
adamc@76 1767 case sgi of
adamc@76 1768 L.SgiConAbs (x, k) =>
adamc@76 1769 let
adamc@76 1770 val k' = elabKind k
adamc@31 1771
adamc@76 1772 val (env', n) = E.pushCNamed env x k' NONE
adamc@76 1773 in
adamc@88 1774 ([(L'.SgiConAbs (x, n, k'), loc)], (env', denv, gs))
adamc@76 1775 end
adamc@31 1776
adamc@76 1777 | L.SgiCon (x, ko, c) =>
adamc@76 1778 let
adamc@76 1779 val k' = case ko of
adamc@76 1780 NONE => kunif loc
adamc@76 1781 | SOME k => elabKind k
adamc@31 1782
adamc@83 1783 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 1784 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 1785 in
adamc@76 1786 checkKind env c' ck k';
adamc@31 1787
adamc@88 1788 ([(L'.SgiCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 1789 end
adamc@31 1790
adamc@191 1791 | L.SgiDatatype (x, xs, xcs) =>
adamc@157 1792 let
adamc@157 1793 val k = (L'.KType, loc)
adamc@191 1794 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1795 val (env, n) = E.pushCNamed env x k' NONE
adamc@157 1796 val t = (L'.CNamed n, loc)
adamc@194 1797 val nxs = length xs - 1
adamc@194 1798 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@157 1799
adamc@157 1800 val (xcs, (used, env, gs)) =
adamc@157 1801 ListUtil.foldlMap
adamc@157 1802 (fn ((x, to), (used, env, gs)) =>
adamc@157 1803 let
adamc@157 1804 val (to, t, gs') = case to of
adamc@157 1805 NONE => (NONE, t, gs)
adamc@157 1806 | SOME t' =>
adamc@157 1807 let
adamc@157 1808 val (t', tk, gs') = elabCon (env, denv) t'
adamc@157 1809 in
adamc@157 1810 checkKind env t' tk k;
adamc@157 1811 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@157 1812 end
adamc@191 1813 val t = foldl (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@157 1814
adamc@157 1815 val (env, n') = E.pushENamed env x t
adamc@157 1816 in
adamc@157 1817 if SS.member (used, x) then
adamc@157 1818 strError env (DuplicateConstructor (x, loc))
adamc@157 1819 else
adamc@157 1820 ();
adamc@157 1821 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@157 1822 end)
adamc@157 1823 (SS.empty, env, []) xcs
adamc@191 1824
adamc@191 1825 val env = E.pushDatatype env n xs xcs
adamc@157 1826 in
adamc@191 1827 ([(L'.SgiDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@157 1828 end
adamc@156 1829
adamc@158 1830 | L.SgiDatatypeImp (_, [], _) => raise Fail "Empty SgiDatatypeImp"
adamc@158 1831
adamc@158 1832 | L.SgiDatatypeImp (x, m1 :: ms, s) =>
adamc@158 1833 (case E.lookupStr env m1 of
adamc@158 1834 NONE => (strError env (UnboundStr (loc, m1));
adamc@158 1835 ([], (env, denv, gs)))
adamc@158 1836 | SOME (n, sgn) =>
adamc@158 1837 let
adamc@158 1838 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@158 1839 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1840 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@158 1841 (strerror, sgnerror))
adamc@158 1842 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@158 1843 ((L'.StrVar n, loc), sgn) ms
adamc@158 1844 in
adamc@161 1845 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@161 1846 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@161 1847 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@161 1848 NONE => (conError env (UnboundDatatype (loc, s));
adamc@161 1849 ([], (env, denv, gs)))
adamc@191 1850 | SOME (xs, xncs) =>
adamc@161 1851 let
adamc@161 1852 val k = (L'.KType, loc)
adamc@191 1853 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 1854
adamc@161 1855 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 1856 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 1857 val env = E.pushDatatype env n' xs xncs
adamc@158 1858
adamc@161 1859 val t = (L'.CNamed n', loc)
adamc@161 1860 val env = foldl (fn ((x, n, to), env) =>
adamc@161 1861 let
adamc@161 1862 val t = case to of
adamc@161 1863 NONE => t
adamc@161 1864 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 1865
adamc@191 1866 val t = foldr (fn (x, t) =>
adamc@191 1867 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 1868 t xs
adamc@161 1869 in
adamc@161 1870 E.pushENamedAs env x n t
adamc@161 1871 end) env xncs
adamc@161 1872 in
adamc@191 1873 ([(L'.SgiDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@161 1874 end)
adamc@161 1875 | _ => (strError env (NotDatatype loc);
adamc@161 1876 ([], (env, denv, [])))
adamc@158 1877 end)
adamc@156 1878
adamc@76 1879 | L.SgiVal (x, c) =>
adamc@76 1880 let
adamc@83 1881 val (c', ck, gs') = elabCon (env, denv) c
adamc@31 1882
adamc@76 1883 val (env', n) = E.pushENamed env x c'
adamc@76 1884 in
adamc@76 1885 (unifyKinds ck ktype
adamc@76 1886 handle KUnify ue => strError env (NotType (ck, ue)));
adamc@31 1887
adamc@88 1888 ([(L'.SgiVal (x, n, c'), loc)], (env', denv, gs' @ gs))
adamc@76 1889 end
adamc@31 1890
adamc@76 1891 | L.SgiStr (x, sgn) =>
adamc@76 1892 let
adamc@83 1893 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1894 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 1895 in
adamc@88 1896 ([(L'.SgiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1897 end
adamc@31 1898
adamc@76 1899 | L.SgiSgn (x, sgn) =>
adamc@76 1900 let
adamc@83 1901 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1902 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 1903 in
adamc@88 1904 ([(L'.SgiSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 1905 end
adamc@31 1906
adamc@76 1907 | L.SgiInclude sgn =>
adamc@76 1908 let
adamc@83 1909 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 1910 in
adamc@76 1911 case #1 (hnormSgn env sgn') of
adamc@76 1912 L'.SgnConst sgis =>
adamc@88 1913 (sgis, (foldl (fn (sgi, env) => E.sgiBinds env sgi) env sgis, denv, gs' @ gs))
adamc@76 1914 | _ => (sgnError env (NotIncludable sgn');
adamc@88 1915 ([], (env, denv, [])))
adamc@88 1916 end
adamc@88 1917
adamc@88 1918 | L.SgiConstraint (c1, c2) =>
adamc@88 1919 let
adamc@88 1920 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 1921 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@88 1922
adamc@90 1923 val (denv, gs3) = D.assert env denv (c1', c2')
adamc@88 1924 in
adamc@88 1925 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 1926 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 1927
adamc@90 1928 ([(L'.SgiConstraint (c1', c2'), loc)], (env, denv, gs1 @ gs2 @ gs3))
adamc@76 1929 end
adamc@31 1930
adamc@203 1931 | L.SgiTable (x, c) =>
adamc@203 1932 let
adamc@203 1933 val (c', k, gs) = elabCon (env, denv) c
adamc@210 1934 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 1935 in
adamc@203 1936 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 1937 ([(L'.SgiTable (!basis_r, x, n, c'), loc)], (env, denv, gs))
adamc@203 1938 end
adamc@203 1939
adamc@211 1940 | L.SgiClassAbs x =>
adamc@211 1941 let
adamc@211 1942 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1943 val (env, n) = E.pushCNamed env x k NONE
adamc@211 1944 val env = E.pushClass env n
adamc@211 1945 in
adamc@211 1946 ([(L'.SgiClassAbs (x, n), loc)], (env, denv, []))
adamc@211 1947 end
adamc@211 1948
adamc@211 1949 | L.SgiClass (x, c) =>
adamc@211 1950 let
adamc@211 1951 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 1952 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 1953 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 1954 val env = E.pushClass env n
adamc@211 1955 in
adamc@211 1956 checkKind env c' ck k;
adamc@211 1957 ([(L'.SgiClass (x, n, c'), loc)], (env, denv, []))
adamc@211 1958 end
adamc@211 1959
adamc@83 1960 and elabSgn (env, denv) (sgn, loc) =
adamc@31 1961 case sgn of
adamc@31 1962 L.SgnConst sgis =>
adamc@31 1963 let
adamc@88 1964 val (sgis', (_, _, gs)) = ListUtil.foldlMapConcat elabSgn_item (env, denv, []) sgis
adamc@62 1965
adamc@62 1966 val _ = foldl (fn ((sgi, loc), (cons, vals, sgns, strs)) =>
adamc@62 1967 case sgi of
adamc@62 1968 L'.SgiConAbs (x, _, _) =>
adamc@62 1969 (if SS.member (cons, x) then
adamc@62 1970 sgnError env (DuplicateCon (loc, x))
adamc@62 1971 else
adamc@62 1972 ();
adamc@62 1973 (SS.add (cons, x), vals, sgns, strs))
adamc@62 1974 | L'.SgiCon (x, _, _, _) =>
adamc@62 1975 (if SS.member (cons, x) then
adamc@62 1976 sgnError env (DuplicateCon (loc, x))
adamc@62 1977 else
adamc@62 1978 ();
adamc@62 1979 (SS.add (cons, x), vals, sgns, strs))
adamc@191 1980 | L'.SgiDatatype (x, _, _, xncs) =>
adamc@156 1981 let
adamc@156 1982 val vals = foldl (fn ((x, _, _), vals) =>
adamc@156 1983 (if SS.member (vals, x) then
adamc@156 1984 sgnError env (DuplicateVal (loc, x))
adamc@156 1985 else
adamc@156 1986 ();
adamc@156 1987 SS.add (vals, x)))
adamc@156 1988 vals xncs
adamc@156 1989 in
adamc@156 1990 if SS.member (cons, x) then
adamc@156 1991 sgnError env (DuplicateCon (loc, x))
adamc@156 1992 else
adamc@156 1993 ();
adamc@156 1994 (SS.add (cons, x), vals, sgns, strs)
adamc@156 1995 end
adamc@191 1996 | L'.SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 1997 (if SS.member (cons, x) then
adamc@156 1998 sgnError env (DuplicateCon (loc, x))
adamc@156 1999 else
adamc@156 2000 ();
adamc@156 2001 (SS.add (cons, x), vals, sgns, strs))
adamc@62 2002 | L'.SgiVal (x, _, _) =>
adamc@62 2003 (if SS.member (vals, x) then
adamc@62 2004 sgnError env (DuplicateVal (loc, x))
adamc@62 2005 else
adamc@62 2006 ();
adamc@62 2007 (cons, SS.add (vals, x), sgns, strs))
adamc@62 2008 | L'.SgiSgn (x, _, _) =>
adamc@62 2009 (if SS.member (sgns, x) then
adamc@62 2010 sgnError env (DuplicateSgn (loc, x))
adamc@62 2011 else
adamc@62 2012 ();
adamc@62 2013 (cons, vals, SS.add (sgns, x), strs))
adamc@62 2014 | L'.SgiStr (x, _, _) =>
adamc@62 2015 (if SS.member (strs, x) then
adamc@62 2016 sgnError env (DuplicateStr (loc, x))
adamc@62 2017 else
adamc@62 2018 ();
adamc@88 2019 (cons, vals, sgns, SS.add (strs, x)))
adamc@203 2020 | L'.SgiConstraint _ => (cons, vals, sgns, strs)
adamc@205 2021 | L'.SgiTable (_, x, _, _) =>
adamc@203 2022 (if SS.member (vals, x) then
adamc@203 2023 sgnError env (DuplicateVal (loc, x))
adamc@203 2024 else
adamc@203 2025 ();
adamc@211 2026 (cons, SS.add (vals, x), sgns, strs))
adamc@211 2027 | L'.SgiClassAbs (x, _) =>
adamc@211 2028 (if SS.member (cons, x) then
adamc@211 2029 sgnError env (DuplicateCon (loc, x))
adamc@211 2030 else
adamc@211 2031 ();
adamc@211 2032 (SS.add (cons, x), vals, sgns, strs))
adamc@211 2033 | L'.SgiClass (x, _, _) =>
adamc@211 2034 (if SS.member (cons, x) then
adamc@211 2035 sgnError env (DuplicateCon (loc, x))
adamc@211 2036 else
adamc@211 2037 ();
adamc@211 2038 (SS.add (cons, x), vals, sgns, strs)))
adamc@62 2039 (SS.empty, SS.empty, SS.empty, SS.empty) sgis'
adamc@31 2040 in
adamc@83 2041 ((L'.SgnConst sgis', loc), gs)
adamc@31 2042 end
adamc@31 2043 | L.SgnVar x =>
adamc@31 2044 (case E.lookupSgn env x of
adamc@31 2045 NONE =>
adamc@31 2046 (sgnError env (UnboundSgn (loc, x));
adamc@83 2047 ((L'.SgnError, loc), []))
adamc@83 2048 | SOME (n, sgis) => ((L'.SgnVar n, loc), []))
adamc@41 2049 | L.SgnFun (m, dom, ran) =>
adamc@41 2050 let
adamc@83 2051 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 2052 val (env', n) = E.pushStrNamed env m dom'
adamc@83 2053 val (ran', gs2) = elabSgn (env', denv) ran
adamc@41 2054 in
adamc@83 2055 ((L'.SgnFun (m, n, dom', ran'), loc), gs1 @ gs2)
adamc@41 2056 end
adamc@42 2057 | L.SgnWhere (sgn, x, c) =>
adamc@42 2058 let
adamc@83 2059 val (sgn', ds1) = elabSgn (env, denv) sgn
adamc@83 2060 val (c', ck, ds2) = elabCon (env, denv) c
adamc@42 2061 in
adamc@42 2062 case #1 (hnormSgn env sgn') of
adamc@83 2063 L'.SgnError => (sgnerror, [])
adamc@42 2064 | L'.SgnConst sgis =>
adamc@75 2065 if List.exists (fn (L'.SgiConAbs (x', _, k), _) =>
adamc@75 2066 x' = x andalso
adamc@75 2067 (unifyKinds k ck
adamc@75 2068 handle KUnify x => sgnError env (WhereWrongKind x);
adamc@42 2069 true)
adamc@42 2070 | _ => false) sgis then
adamc@83 2071 ((L'.SgnWhere (sgn', x, c'), loc), ds1 @ ds2)
adamc@42 2072 else
adamc@42 2073 (sgnError env (UnWhereable (sgn', x));
adamc@83 2074 (sgnerror, []))
adamc@42 2075 | _ => (sgnError env (UnWhereable (sgn', x));
adamc@83 2076 (sgnerror, []))
adamc@42 2077 end
adamc@59 2078 | L.SgnProj (m, ms, x) =>
adamc@59 2079 (case E.lookupStr env m of
adamc@59 2080 NONE => (strError env (UnboundStr (loc, m));
adamc@83 2081 (sgnerror, []))
adamc@59 2082 | SOME (n, sgn) =>
adamc@59 2083 let
adamc@59 2084 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@59 2085 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@59 2086 NONE => (strError env (UnboundStr (loc, m));
adamc@59 2087 (strerror, sgnerror))
adamc@59 2088 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@59 2089 ((L'.StrVar n, loc), sgn) ms
adamc@59 2090 in
adamc@59 2091 case E.projectSgn env {sgn = sgn, str = str, field = x} of
adamc@59 2092 NONE => (sgnError env (UnboundSgn (loc, x));
adamc@83 2093 (sgnerror, []))
adamc@83 2094 | SOME _ => ((L'.SgnProj (n, ms, x), loc), [])
adamc@59 2095 end)
adamc@59 2096
adamc@31 2097
adamc@66 2098 fun selfify env {str, strs, sgn} =
adamc@66 2099 case #1 (hnormSgn env sgn) of
adamc@66 2100 L'.SgnError => sgn
adamc@66 2101 | L'.SgnVar _ => sgn
adamc@66 2102
adamc@66 2103 | L'.SgnConst sgis =>
adamc@66 2104 (L'.SgnConst (map (fn (L'.SgiConAbs (x, n, k), loc) =>
adamc@66 2105 (L'.SgiCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2106 | (L'.SgiDatatype (x, n, xs, xncs), loc) =>
adamc@191 2107 (L'.SgiDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@66 2108 | (L'.SgiStr (x, n, sgn), loc) =>
adamc@66 2109 (L'.SgiStr (x, n, selfify env {str = str, strs = strs @ [x], sgn = sgn}), loc)
adamc@66 2110 | x => x) sgis), #2 sgn)
adamc@66 2111 | L'.SgnFun _ => sgn
adamc@66 2112 | L'.SgnWhere _ => sgn
adamc@66 2113 | L'.SgnProj (m, ms, x) =>
adamc@66 2114 case E.projectSgn env {str = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2115 (L'.StrVar m, #2 sgn) ms,
adamc@66 2116 sgn = #2 (E.lookupStrNamed env m),
adamc@66 2117 field = x} of
adamc@66 2118 NONE => raise Fail "Elaborate.selfify: projectSgn returns NONE"
adamc@66 2119 | SOME sgn => selfify env {str = str, strs = strs, sgn = sgn}
adamc@66 2120
adamc@66 2121 fun selfifyAt env {str, sgn} =
adamc@66 2122 let
adamc@66 2123 fun self (str, _) =
adamc@66 2124 case str of
adamc@66 2125 L'.StrVar x => SOME (x, [])
adamc@66 2126 | L'.StrProj (str, x) =>
adamc@66 2127 (case self str of
adamc@66 2128 NONE => NONE
adamc@66 2129 | SOME (m, ms) => SOME (m, ms @ [x]))
adamc@66 2130 | _ => NONE
adamc@66 2131 in
adamc@66 2132 case self str of
adamc@66 2133 NONE => sgn
adamc@66 2134 | SOME (str, strs) => selfify env {sgn = sgn, str = str, strs = strs}
adamc@66 2135 end
adamc@66 2136
adamc@88 2137 fun dopen (env, denv) {str, strs, sgn} =
adamc@66 2138 let
adamc@66 2139 val m = foldl (fn (m, str) => (L'.StrProj (str, m), #2 sgn))
adamc@66 2140 (L'.StrVar str, #2 sgn) strs
adamc@66 2141 in
adamc@66 2142 case #1 (hnormSgn env sgn) of
adamc@66 2143 L'.SgnConst sgis =>
adamc@88 2144 ListUtil.foldlMap (fn ((sgi, loc), (env', denv')) =>
adamc@162 2145 let
adamc@162 2146 val d =
adamc@162 2147 case sgi of
adamc@162 2148 L'.SgiConAbs (x, n, k) =>
adamc@162 2149 let
adamc@162 2150 val c = (L'.CModProj (str, strs, x), loc)
adamc@162 2151 in
adamc@162 2152 (L'.DCon (x, n, k, c), loc)
adamc@162 2153 end
adamc@162 2154 | L'.SgiCon (x, n, k, c) =>
adamc@162 2155 (L'.DCon (x, n, k, (L'.CModProj (str, strs, x), loc)), loc)
adamc@191 2156 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@191 2157 (L'.DDatatypeImp (x, n, str, strs, x, xs, xncs), loc)
adamc@191 2158 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@191 2159 (L'.DDatatypeImp (x, n, m1, ms, x', xs, xncs), loc)
adamc@162 2160 | L'.SgiVal (x, n, t) =>
adamc@162 2161 (L'.DVal (x, n, t, (L'.EModProj (str, strs, x), loc)), loc)
adamc@162 2162 | L'.SgiStr (x, n, sgn) =>
adamc@162 2163 (L'.DStr (x, n, sgn, (L'.StrProj (m, x), loc)), loc)
adamc@162 2164 | L'.SgiSgn (x, n, sgn) =>
adamc@162 2165 (L'.DSgn (x, n, (L'.SgnProj (str, strs, x), loc)), loc)
adamc@162 2166 | L'.SgiConstraint (c1, c2) =>
adamc@162 2167 (L'.DConstraint (c1, c2), loc)
adamc@205 2168 | L'.SgiTable (_, x, n, c) =>
adamc@210 2169 (L'.DVal (x, n, (L'.CApp (tableOf (), c), loc),
adamc@203 2170 (L'.EModProj (str, strs, x), loc)), loc)
adamc@211 2171 | L'.SgiClassAbs (x, n) =>
adamc@211 2172 let
adamc@211 2173 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2174 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2175 in
adamc@211 2176 (L'.DCon (x, n, k, c), loc)
adamc@211 2177 end
adamc@211 2178 | L'.SgiClass (x, n, _) =>
adamc@211 2179 let
adamc@211 2180 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2181 val c = (L'.CModProj (str, strs, x), loc)
adamc@211 2182 in
adamc@211 2183 (L'.DCon (x, n, k, c), loc)
adamc@211 2184 end
adamc@162 2185 in
adamc@162 2186 (d, (E.declBinds env' d, denv'))
adamc@162 2187 end)
adamc@88 2188 (env, denv) sgis
adamc@66 2189 | _ => (strError env (UnOpenable sgn);
adamc@88 2190 ([], (env, denv)))
adamc@66 2191 end
adamc@66 2192
adamc@88 2193 fun dopenConstraints (loc, env, denv) {str, strs} =
adamc@88 2194 case E.lookupStr env str of
adamc@88 2195 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2196 denv)
adamc@88 2197 | SOME (n, sgn) =>
adamc@88 2198 let
adamc@88 2199 val (st, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2200 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2201 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2202 (strerror, sgnerror))
adamc@88 2203 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2204 ((L'.StrVar n, loc), sgn) strs
adamc@88 2205
adamc@88 2206 val cso = E.projectConstraints env {sgn = sgn, str = st}
adamc@88 2207
adamc@88 2208 val denv = case cso of
adamc@88 2209 NONE => (strError env (UnboundStr (loc, str));
adamc@88 2210 denv)
adamc@90 2211 | SOME cs => foldl (fn ((c1, c2), denv) =>
adamc@90 2212 let
adamc@90 2213 val (denv, gs) = D.assert env denv (c1, c2)
adamc@90 2214 in
adamc@90 2215 case gs of
adamc@90 2216 [] => ()
adamc@90 2217 | _ => raise Fail "dopenConstraints: Sub-constraints remain";
adamc@90 2218
adamc@90 2219 denv
adamc@90 2220 end) denv cs
adamc@88 2221 in
adamc@88 2222 denv
adamc@88 2223 end
adamc@88 2224
adamc@31 2225 fun sgiOfDecl (d, loc) =
adamc@31 2226 case d of
adamc@123 2227 L'.DCon (x, n, k, c) => [(L'.SgiCon (x, n, k, c), loc)]
adamc@156 2228 | L'.DDatatype x => [(L'.SgiDatatype x, loc)]
adamc@156 2229 | L'.DDatatypeImp x => [(L'.SgiDatatypeImp x, loc)]
adamc@123 2230 | L'.DVal (x, n, t, _) => [(L'.SgiVal (x, n, t), loc)]
adamc@123 2231 | L'.DValRec vis => map (fn (x, n, t, _) => (L'.SgiVal (x, n, t), loc)) vis
adamc@123 2232 | L'.DSgn (x, n, sgn) => [(L'.SgiSgn (x, n, sgn), loc)]
adamc@123 2233 | L'.DStr (x, n, sgn, _) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2234 | L'.DFfiStr (x, n, sgn) => [(L'.SgiStr (x, n, sgn), loc)]
adamc@123 2235 | L'.DConstraint cs => [(L'.SgiConstraint cs, loc)]
adamc@123 2236 | L'.DExport _ => []
adamc@205 2237 | L'.DTable (tn, x, n, c) => [(L'.SgiTable (tn, x, n, c), loc)]
adamc@88 2238
adamc@88 2239 fun sgiBindsD (env, denv) (sgi, _) =
adamc@88 2240 case sgi of
adamc@90 2241 L'.SgiConstraint (c1, c2) =>
adamc@90 2242 (case D.assert env denv (c1, c2) of
adamc@90 2243 (denv, []) => denv
adamc@90 2244 | _ => raise Fail "sgiBindsD: Sub-constraints remain")
adamc@88 2245 | _ => denv
adamc@31 2246
adamc@86 2247 fun subSgn (env, denv) sgn1 (sgn2 as (_, loc2)) =
adamc@35 2248 case (#1 (hnormSgn env sgn1), #1 (hnormSgn env sgn2)) of
adamc@31 2249 (L'.SgnError, _) => ()
adamc@31 2250 | (_, L'.SgnError) => ()
adamc@31 2251
adamc@31 2252 | (L'.SgnConst sgis1, L'.SgnConst sgis2) =>
adamc@31 2253 let
adamc@156 2254 fun folder (sgi2All as (sgi, loc), (env, denv)) =
adamc@31 2255 let
adamc@31 2256 fun seek p =
adamc@31 2257 let
adamc@88 2258 fun seek (env, denv) ls =
adamc@31 2259 case ls of
adamc@31 2260 [] => (sgnError env (UnmatchedSgi sgi2All);
adamc@88 2261 (env, denv))
adamc@31 2262 | h :: t =>
adamc@31 2263 case p h of
adamc@88 2264 NONE => seek (E.sgiBinds env h, sgiBindsD (env, denv) h) t
adamc@88 2265 | SOME envs => envs
adamc@31 2266 in
adamc@88 2267 seek (env, denv) sgis1
adamc@31 2268 end
adamc@31 2269 in
adamc@31 2270 case sgi of
adamc@31 2271 L'.SgiConAbs (x, n2, k2) =>
adamc@31 2272 seek (fn sgi1All as (sgi1, _) =>
adamc@31 2273 let
adamc@41 2274 fun found (x', n1, k1, co1) =
adamc@41 2275 if x = x' then
adamc@41 2276 let
adamc@41 2277 val () = unifyKinds k1 k2
adamc@41 2278 handle KUnify (k1, k2, err) =>
adamc@41 2279 sgnError env (SgiWrongKind (sgi1All, k1, sgi2All, k2, err))
adamc@41 2280 val env = E.pushCNamedAs env x n1 k1 co1
adamc@41 2281 in
adamc@41 2282 SOME (if n1 = n2 then
adamc@41 2283 env
adamc@41 2284 else
adamc@88 2285 E.pushCNamedAs env x n2 k2 (SOME (L'.CNamed n1, loc2)),
adamc@88 2286 denv)
adamc@41 2287 end
adamc@41 2288 else
adamc@41 2289 NONE
adamc@31 2290 in
adamc@31 2291 case sgi1 of
adamc@41 2292 L'.SgiConAbs (x', n1, k1) => found (x', n1, k1, NONE)
adamc@41 2293 | L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, SOME c1)
adamc@191 2294 | L'.SgiDatatype (x', n1, xs, _) =>
adamc@191 2295 let
adamc@191 2296 val k = (L'.KType, loc)
adamc@191 2297 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2298 in
adamc@191 2299 found (x', n1, k', NONE)
adamc@191 2300 end
adamc@191 2301 | L'.SgiDatatypeImp (x', n1, m1, ms, s, xs, _) =>
adamc@191 2302 let
adamc@191 2303 val k = (L'.KType, loc)
adamc@191 2304 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2305 in
adamc@191 2306 found (x', n1, k', SOME (L'.CModProj (m1, ms, s), loc))
adamc@191 2307 end
adamc@211 2308 | L'.SgiClassAbs (x', n1) => found (x', n1,
adamc@211 2309 (L'.KArrow ((L'.KType, loc),
adamc@211 2310 (L'.KType, loc)), loc),
adamc@211 2311 NONE)
adamc@211 2312 | L'.SgiClass (x', n1, c) => found (x', n1,
adamc@211 2313 (L'.KArrow ((L'.KType, loc),
adamc@211 2314 (L'.KType, loc)), loc),
adamc@211 2315 SOME c)
adamc@31 2316 | _ => NONE
adamc@31 2317 end)
adamc@31 2318
adamc@31 2319 | L'.SgiCon (x, n2, k2, c2) =>
adamc@31 2320 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2321 let
adamc@211 2322 fun found (x', n1, k1, c1) =
adamc@211 2323 if x = x' then
adamc@211 2324 let
adamc@211 2325 fun good () = SOME (E.pushCNamedAs env x n2 k2 (SOME c2), denv)
adamc@211 2326 in
adamc@211 2327 (case unifyCons (env, denv) c1 c2 of
adamc@211 2328 [] => good ()
adamc@211 2329 | _ => NONE)
adamc@211 2330 handle CUnify (c1, c2, err) =>
adamc@211 2331 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2332 good ())
adamc@211 2333 end
adamc@211 2334 else
adamc@211 2335 NONE
adamc@211 2336 in
adamc@211 2337 case sgi1 of
adamc@211 2338 L'.SgiCon (x', n1, k1, c1) => found (x', n1, k1, c1)
adamc@211 2339 | L'.SgiClass (x', n1, c1) =>
adamc@211 2340 found (x', n1, (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc), c1)
adamc@211 2341 | _ => NONE
adamc@211 2342 end)
adamc@31 2343
adamc@191 2344 | L'.SgiDatatype (x, n2, xs2, xncs2) =>
adamc@156 2345 seek (fn sgi1All as (sgi1, _) =>
adamc@160 2346 let
adamc@191 2347 fun found (n1, xs1, xncs1) =
adamc@160 2348 let
adamc@160 2349 fun mismatched ue =
adamc@160 2350 (sgnError env (SgiMismatchedDatatypes (sgi1All, sgi2All, ue));
adamc@160 2351 SOME (env, denv))
adamc@156 2352
adamc@191 2353 val k = (L'.KType, loc)
adamc@191 2354 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs1
adamc@191 2355
adamc@160 2356 fun good () =
adamc@160 2357 let
adamc@160 2358 val env = E.sgiBinds env sgi2All
adamc@160 2359 val env = if n1 = n2 then
adamc@160 2360 env
adamc@160 2361 else
adamc@160 2362 E.pushCNamedAs env x n1 (L'.KType, loc)
adamc@160 2363 (SOME (L'.CNamed n1, loc))
adamc@160 2364 in
adamc@160 2365 SOME (env, denv)
adamc@160 2366 end
adamc@156 2367
adamc@191 2368 val env = foldl (fn (x, env) => E.pushCRel env x k) env xs1
adamc@160 2369 fun xncBad ((x1, _, t1), (x2, _, t2)) =
adamc@160 2370 String.compare (x1, x2) <> EQUAL
adamc@160 2371 orelse case (t1, t2) of
adamc@160 2372 (NONE, NONE) => false
adamc@160 2373 | (SOME t1, SOME t2) =>
adamc@160 2374 not (List.null (unifyCons (env, denv) t1 t2))
adamc@160 2375 | _ => true
adamc@160 2376 in
adamc@191 2377 (if xs1 <> xs2
adamc@191 2378 orelse length xncs1 <> length xncs2
adamc@160 2379 orelse ListPair.exists xncBad (xncs1, xncs2) then
adamc@160 2380 mismatched NONE
adamc@160 2381 else
adamc@160 2382 good ())
adamc@160 2383 handle CUnify ue => mismatched (SOME ue)
adamc@160 2384 end
adamc@160 2385 in
adamc@160 2386 case sgi1 of
adamc@191 2387 L'.SgiDatatype (x', n1, xs, xncs1) =>
adamc@160 2388 if x' = x then
adamc@191 2389 found (n1, xs, xncs1)
adamc@160 2390 else
adamc@160 2391 NONE
adamc@191 2392 | L'.SgiDatatypeImp (x', n1, _, _, _, xs, xncs1) =>
adamc@162 2393 if x' = x then
adamc@191 2394 found (n1, xs, xncs1)
adamc@162 2395 else
adamc@162 2396 NONE
adamc@160 2397 | _ => NONE
adamc@160 2398 end)
adamc@156 2399
adamc@191 2400 | L'.SgiDatatypeImp (x, n2, m12, ms2, s2, xs, _) =>
adamc@158 2401 seek (fn sgi1All as (sgi1, _) =>
adamc@158 2402 case sgi1 of
adamc@191 2403 L'.SgiDatatypeImp (x', n1, m11, ms1, s1, _, _) =>
adamc@158 2404 if x = x' then
adamc@158 2405 let
adamc@158 2406 val k = (L'.KType, loc)
adamc@191 2407 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2408 val t1 = (L'.CModProj (m11, ms1, s1), loc)
adamc@158 2409 val t2 = (L'.CModProj (m12, ms2, s2), loc)
adamc@158 2410
adamc@158 2411 fun good () =
adamc@158 2412 let
adamc@191 2413 val env = E.pushCNamedAs env x n1 k' (SOME t1)
adamc@191 2414 val env = E.pushCNamedAs env x n2 k' (SOME t2)
adamc@158 2415 in
adamc@158 2416 SOME (env, denv)
adamc@158 2417 end
adamc@158 2418 in
adamc@158 2419 (case unifyCons (env, denv) t1 t2 of
adamc@158 2420 [] => good ()
adamc@158 2421 | _ => NONE)
adamc@158 2422 handle CUnify (c1, c2, err) =>
adamc@158 2423 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@158 2424 good ())
adamc@158 2425 end
adamc@158 2426 else
adamc@158 2427 NONE
adamc@158 2428
adamc@158 2429 | _ => NONE)
adamc@156 2430
adamc@32 2431 | L'.SgiVal (x, n2, c2) =>
adamc@32 2432 seek (fn sgi1All as (sgi1, _) =>
adamc@32 2433 case sgi1 of
adamc@41 2434 L'.SgiVal (x', n1, c1) =>
adamc@41 2435 if x = x' then
adamc@86 2436 (case unifyCons (env, denv) c1 c2 of
adamc@88 2437 [] => SOME (env, denv)
adamc@86 2438 | _ => NONE)
adamc@86 2439 handle CUnify (c1, c2, err) =>
adamc@86 2440 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@88 2441 SOME (env, denv))
adamc@41 2442 else
adamc@41 2443 NONE
adamc@205 2444 | L'.SgiTable (_, x', n1, c1) =>
adamc@203 2445 if x = x' then
adamc@210 2446 (case unifyCons (env, denv) (L'.CApp (tableOf (), c1), loc) c2 of
adamc@203 2447 [] => SOME (env, denv)
adamc@203 2448 | _ => NONE)
adamc@203 2449 handle CUnify (c1, c2, err) =>
adamc@203 2450 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2451 SOME (env, denv))
adamc@203 2452 else
adamc@203 2453 NONE
adamc@32 2454 | _ => NONE)
adamc@32 2455
adamc@33 2456 | L'.SgiStr (x, n2, sgn2) =>
adamc@33 2457 seek (fn sgi1All as (sgi1, _) =>
adamc@33 2458 case sgi1 of
adamc@41 2459 L'.SgiStr (x', n1, sgn1) =>
adamc@41 2460 if x = x' then
adamc@66 2461 let
adamc@86 2462 val () = subSgn (env, denv) sgn1 sgn2
adamc@66 2463 val env = E.pushStrNamedAs env x n1 sgn1
adamc@66 2464 val env = if n1 = n2 then
adamc@66 2465 env
adamc@66 2466 else
adamc@66 2467 E.pushStrNamedAs env x n2
adamc@66 2468 (selfifyAt env {str = (L'.StrVar n1, #2 sgn2),
adamc@66 2469 sgn = sgn2})
adamc@66 2470 in
adamc@88 2471 SOME (env, denv)
adamc@66 2472 end
adamc@41 2473 else
adamc@41 2474 NONE
adamc@33 2475 | _ => NONE)
adamc@59 2476
adamc@59 2477 | L'.SgiSgn (x, n2, sgn2) =>
adamc@59 2478 seek (fn sgi1All as (sgi1, _) =>
adamc@59 2479 case sgi1 of
adamc@59 2480 L'.SgiSgn (x', n1, sgn1) =>
adamc@59 2481 if x = x' then
adamc@65 2482 let
adamc@86 2483 val () = subSgn (env, denv) sgn1 sgn2
adamc@86 2484 val () = subSgn (env, denv) sgn2 sgn1
adamc@65 2485
adamc@65 2486 val env = E.pushSgnNamedAs env x n2 sgn2
adamc@65 2487 val env = if n1 = n2 then
adamc@65 2488 env
adamc@65 2489 else
adamc@65 2490 E.pushSgnNamedAs env x n1 sgn2
adamc@65 2491 in
adamc@88 2492 SOME (env, denv)
adamc@65 2493 end
adamc@59 2494 else
adamc@59 2495 NONE
adamc@59 2496 | _ => NONE)
adamc@88 2497
adamc@88 2498 | L'.SgiConstraint (c2, d2) =>
adamc@88 2499 seek (fn sgi1All as (sgi1, _) =>
adamc@88 2500 case sgi1 of
adamc@88 2501 L'.SgiConstraint (c1, d1) =>
adamc@88 2502 if consEq (env, denv) (c1, c2) andalso consEq (env, denv) (d1, d2) then
adamc@90 2503 let
adamc@90 2504 val (denv, gs) = D.assert env denv (c2, d2)
adamc@90 2505 in
adamc@90 2506 case gs of
adamc@90 2507 [] => ()
adamc@90 2508 | _ => raise Fail "subSgn: Sub-constraints remain";
adamc@90 2509
adamc@90 2510 SOME (env, denv)
adamc@90 2511 end
adamc@88 2512 else
adamc@88 2513 NONE
adamc@88 2514 | _ => NONE)
adamc@203 2515
adamc@205 2516 | L'.SgiTable (_, x, n2, c2) =>
adamc@203 2517 seek (fn sgi1All as (sgi1, _) =>
adamc@203 2518 case sgi1 of
adamc@205 2519 L'.SgiTable (_, x', n1, c1) =>
adamc@203 2520 if x = x' then
adamc@203 2521 (case unifyCons (env, denv) c1 c2 of
adamc@203 2522 [] => SOME (env, denv)
adamc@203 2523 | _ => NONE)
adamc@203 2524 handle CUnify (c1, c2, err) =>
adamc@203 2525 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@203 2526 SOME (env, denv))
adamc@203 2527 else
adamc@203 2528 NONE
adamc@203 2529 | _ => NONE)
adamc@211 2530
adamc@211 2531 | L'.SgiClassAbs (x, n2) =>
adamc@211 2532 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2533 let
adamc@211 2534 fun found (x', n1, co) =
adamc@211 2535 if x = x' then
adamc@211 2536 let
adamc@211 2537 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2538 val env = E.pushCNamedAs env x n1 k co
adamc@211 2539 in
adamc@211 2540 SOME (if n1 = n2 then
adamc@211 2541 env
adamc@211 2542 else
adamc@211 2543 E.pushCNamedAs env x n2 k (SOME (L'.CNamed n1, loc2)),
adamc@211 2544 denv)
adamc@211 2545 end
adamc@211 2546 else
adamc@211 2547 NONE
adamc@211 2548 in
adamc@211 2549 case sgi1 of
adamc@211 2550 L'.SgiClassAbs (x', n1) => found (x', n1, NONE)
adamc@211 2551 | L'.SgiClass (x', n1, c) => found (x', n1, SOME c)
adamc@211 2552 | _ => NONE
adamc@211 2553 end)
adamc@211 2554 | L'.SgiClass (x, n2, c2) =>
adamc@211 2555 seek (fn sgi1All as (sgi1, _) =>
adamc@211 2556 let
adamc@211 2557 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2558
adamc@211 2559 fun found (x', n1, c1) =
adamc@211 2560 if x = x' then
adamc@211 2561 let
adamc@211 2562 fun good () = SOME (E.pushCNamedAs env x n2 k (SOME c2), denv)
adamc@211 2563 in
adamc@211 2564 (case unifyCons (env, denv) c1 c2 of
adamc@211 2565 [] => good ()
adamc@211 2566 | _ => NONE)
adamc@211 2567 handle CUnify (c1, c2, err) =>
adamc@211 2568 (sgnError env (SgiWrongCon (sgi1All, c1, sgi2All, c2, err));
adamc@211 2569 good ())
adamc@211 2570 end
adamc@211 2571 else
adamc@211 2572 NONE
adamc@211 2573 in
adamc@211 2574 case sgi1 of
adamc@211 2575 L'.SgiClass (x', n1, c1) => found (x', n1, c1)
adamc@211 2576 | _ => NONE
adamc@211 2577 end)
adamc@31 2578 end
adamc@31 2579 in
adamc@88 2580 ignore (foldl folder (env, denv) sgis2)
adamc@31 2581 end
adamc@31 2582
adamc@41 2583 | (L'.SgnFun (m1, n1, dom1, ran1), L'.SgnFun (m2, n2, dom2, ran2)) =>
adamc@43 2584 let
adamc@43 2585 val ran1 =
adamc@43 2586 if n1 = n2 then
adamc@43 2587 ran1
adamc@43 2588 else
adamc@43 2589 subStrInSgn (n1, n2) ran1
adamc@43 2590 in
adamc@86 2591 subSgn (env, denv) dom2 dom1;
adamc@86 2592 subSgn (E.pushStrNamedAs env m2 n2 dom2, denv) ran1 ran2
adamc@43 2593 end
adamc@41 2594
adamc@41 2595 | _ => sgnError env (SgnWrongForm (sgn1, sgn2))
adamc@41 2596
adamc@61 2597
adamc@88 2598 fun elabDecl ((d, loc), (env, denv, gs)) =
adamc@76 2599 case d of
adamc@76 2600 L.DCon (x, ko, c) =>
adamc@76 2601 let
adamc@76 2602 val k' = case ko of
adamc@76 2603 NONE => kunif loc
adamc@76 2604 | SOME k => elabKind k
adamc@76 2605
adamc@83 2606 val (c', ck, gs') = elabCon (env, denv) c
adamc@76 2607 val (env', n) = E.pushCNamed env x k' (SOME c')
adamc@76 2608 in
adamc@76 2609 checkKind env c' ck k';
adamc@76 2610
adamc@88 2611 ([(L'.DCon (x, n, k', c'), loc)], (env', denv, gs' @ gs))
adamc@76 2612 end
adamc@191 2613 | L.DDatatype (x, xs, xcs) =>
adamc@156 2614 let
adamc@156 2615 val k = (L'.KType, loc)
adamc@191 2616 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@191 2617 val (env, n) = E.pushCNamed env x k' NONE
adamc@156 2618 val t = (L'.CNamed n, loc)
adamc@194 2619 val nxs = length xs - 1
adamc@194 2620 val t = ListUtil.foldli (fn (i, _, t) => (L'.CApp (t, (L'.CRel (nxs - i), loc)), loc)) t xs
adamc@191 2621
adamc@191 2622 val (env', denv') = foldl (fn (x, (env', denv')) =>
adamc@191 2623 (E.pushCRel env' x k,
adamc@191 2624 D.enter denv')) (env, denv) xs
adamc@156 2625
adamc@156 2626 val (xcs, (used, env, gs)) =
adamc@156 2627 ListUtil.foldlMap
adamc@156 2628 (fn ((x, to), (used, env, gs)) =>
adamc@156 2629 let
adamc@156 2630 val (to, t, gs') = case to of
adamc@156 2631 NONE => (NONE, t, gs)
adamc@156 2632 | SOME t' =>
adamc@156 2633 let
adamc@191 2634 val (t', tk, gs') = elabCon (env', denv') t'
adamc@156 2635 in
adamc@191 2636 checkKind env' t' tk k;
adamc@156 2637 (SOME t', (L'.TFun (t', t), loc), gs' @ gs)
adamc@156 2638 end
adamc@191 2639 val t = foldr (fn (x, t) => (L'.TCFun (L'.Implicit, x, k, t), loc)) t xs
adamc@156 2640
adamc@156 2641 val (env, n') = E.pushENamed env x t
adamc@156 2642 in
adamc@156 2643 if SS.member (used, x) then
adamc@156 2644 strError env (DuplicateConstructor (x, loc))
adamc@156 2645 else
adamc@156 2646 ();
adamc@156 2647 ((x, n', to), (SS.add (used, x), env, gs'))
adamc@156 2648 end)
adamc@156 2649 (SS.empty, env, []) xcs
adamc@171 2650
adamc@191 2651 val env = E.pushDatatype env n xs xcs
adamc@156 2652 in
adamc@191 2653 ([(L'.DDatatype (x, n, xs, xcs), loc)], (env, denv, gs))
adamc@156 2654 end
adamc@156 2655
adamc@157 2656 | L.DDatatypeImp (_, [], _) => raise Fail "Empty DDatatypeImp"
adamc@157 2657
adamc@157 2658 | L.DDatatypeImp (x, m1 :: ms, s) =>
adamc@157 2659 (case E.lookupStr env m1 of
adamc@157 2660 NONE => (expError env (UnboundStrInExp (loc, m1));
adamc@157 2661 ([], (env, denv, gs)))
adamc@157 2662 | SOME (n, sgn) =>
adamc@157 2663 let
adamc@157 2664 val (str, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@157 2665 case E.projectStr env {sgn = sgn, str = str, field = m} of
adamc@157 2666 NONE => (conError env (UnboundStrInCon (loc, m));
adamc@157 2667 (strerror, sgnerror))
adamc@157 2668 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@157 2669 ((L'.StrVar n, loc), sgn) ms
adamc@157 2670 in
adamc@158 2671 case hnormCon (env, denv) (L'.CModProj (n, ms, s), loc) of
adamc@158 2672 ((L'.CModProj (n, ms, s), _), gs) =>
adamc@158 2673 (case E.projectDatatype env {sgn = sgn, str = str, field = s} of
adamc@158 2674 NONE => (conError env (UnboundDatatype (loc, s));
adamc@158 2675 ([], (env, denv, gs)))
adamc@191 2676 | SOME (xs, xncs) =>
adamc@158 2677 let
adamc@158 2678 val k = (L'.KType, loc)
adamc@191 2679 val k' = foldl (fn (_, k') => (L'.KArrow (k, k'), loc)) k xs
adamc@158 2680 val t = (L'.CModProj (n, ms, s), loc)
adamc@191 2681 val (env, n') = E.pushCNamed env x k' (SOME t)
adamc@191 2682 val env = E.pushDatatype env n' xs xncs
adamc@157 2683
adamc@158 2684 val t = (L'.CNamed n', loc)
adamc@158 2685 val env = foldl (fn ((x, n, to), env) =>
adamc@158 2686 let
adamc@158 2687 val t = case to of
adamc@158 2688 NONE => t
adamc@158 2689 | SOME t' => (L'.TFun (t', t), loc)
adamc@191 2690
adamc@191 2691 val t = foldr (fn (x, t) =>
adamc@191 2692 (L'.TCFun (L'.Implicit, x, k, t), loc))
adamc@191 2693 t xs
adamc@158 2694 in
adamc@158 2695 E.pushENamedAs env x n t
adamc@158 2696 end) env xncs
adamc@158 2697 in
adamc@191 2698 ([(L'.DDatatypeImp (x, n', n, ms, s, xs, xncs), loc)], (env, denv, gs))
adamc@158 2699 end)
adamc@158 2700 | _ => (strError env (NotDatatype loc);
adamc@158 2701 ([], (env, denv, [])))
adamc@157 2702 end)
adamc@157 2703
adamc@76 2704 | L.DVal (x, co, e) =>
adamc@76 2705 let
adamc@123 2706 val (c', _, gs1) = case co of
adamc@83 2707 NONE => (cunif (loc, ktype), ktype, [])
adamc@83 2708 | SOME c => elabCon (env, denv) c
adamc@76 2709
adamc@83 2710 val (e', et, gs2) = elabExp (env, denv) e
adamc@76 2711 val (env', n) = E.pushENamed env x c'
adamc@86 2712
adamc@86 2713 val gs3 = checkCon (env, denv) e' et c'
adamc@76 2714 in
adamc@88 2715 ([(L'.DVal (x, n, c', e'), loc)], (env', denv, gs1 @ gs2 @ gs3 @ gs))
adamc@76 2716 end
adamc@123 2717 | L.DValRec vis =>
adamc@123 2718 let
adamc@123 2719 val (vis, gs) = ListUtil.foldlMap
adamc@123 2720 (fn ((x, co, e), gs) =>
adamc@123 2721 let
adamc@123 2722 val (c', _, gs1) = case co of
adamc@123 2723 NONE => (cunif (loc, ktype), ktype, [])
adamc@123 2724 | SOME c => elabCon (env, denv) c
adamc@123 2725 in
adamc@123 2726 ((x, c', e), gs1 @ gs)
adamc@123 2727 end) [] vis
adamc@123 2728
adamc@123 2729 val (vis, env) = ListUtil.foldlMap (fn ((x, c', e), env) =>
adamc@123 2730 let
adamc@123 2731 val (env, n) = E.pushENamed env x c'
adamc@123 2732 in
adamc@123 2733 ((x, n, c', e), env)
adamc@123 2734 end) env vis
adamc@123 2735
adamc@123 2736 val (vis, gs) = ListUtil.foldlMap (fn ((x, n, c', e), gs) =>
adamc@123 2737 let
adamc@123 2738 val (e', et, gs1) = elabExp (env, denv) e
adamc@123 2739
adamc@123 2740 val gs2 = checkCon (env, denv) e' et c'
adamc@123 2741 in
adamc@123 2742 ((x, n, c', e'), gs1 @ gs2 @ gs)
adamc@123 2743 end) gs vis
adamc@123 2744 in
adamc@123 2745 ([(L'.DValRec vis, loc)], (env, denv, gs))
adamc@123 2746 end
adamc@76 2747
adamc@76 2748 | L.DSgn (x, sgn) =>
adamc@76 2749 let
adamc@83 2750 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2751 val (env', n) = E.pushSgnNamed env x sgn'
adamc@76 2752 in
adamc@88 2753 ([(L'.DSgn (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2754 end
adamc@76 2755
adamc@76 2756 | L.DStr (x, sgno, str) =>
adamc@76 2757 let
adamc@93 2758 val () = if x = "Basis" then
adamc@93 2759 raise Fail "Not allowed to redefine structure 'Basis'"
adamc@93 2760 else
adamc@93 2761 ()
adamc@93 2762
adamc@83 2763 val formal = Option.map (elabSgn (env, denv)) sgno
adamc@76 2764
adamc@83 2765 val (str', sgn', gs') =
adamc@78 2766 case formal of
adamc@78 2767 NONE =>
adamc@78 2768 let
adamc@83 2769 val (str', actual, ds) = elabStr (env, denv) str
adamc@78 2770 in
adamc@83 2771 (str', selfifyAt env {str = str', sgn = actual}, ds)
adamc@78 2772 end
adamc@83 2773 | SOME (formal, gs1) =>
adamc@78 2774 let
adamc@78 2775 val str =
adamc@78 2776 case #1 (hnormSgn env formal) of
adamc@78 2777 L'.SgnConst sgis =>
adamc@78 2778 (case #1 str of
adamc@78 2779 L.StrConst ds =>
adamc@78 2780 let
adamc@78 2781 val needed = foldl (fn ((sgi, _), needed) =>
adamc@78 2782 case sgi of
adamc@78 2783 L'.SgiConAbs (x, _, _) => SS.add (needed, x)
adamc@78 2784 | _ => needed)
adamc@78 2785 SS.empty sgis
adamc@78 2786
adamc@78 2787 val needed = foldl (fn ((d, _), needed) =>
adamc@78 2788 case d of
adamc@78 2789 L.DCon (x, _, _) => (SS.delete (needed, x)
adamc@78 2790 handle NotFound => needed)
adamc@78 2791 | L.DOpen _ => SS.empty
adamc@78 2792 | _ => needed)
adamc@78 2793 needed ds
adamc@78 2794 in
adamc@78 2795 case SS.listItems needed of
adamc@78 2796 [] => str
adamc@78 2797 | xs =>
adamc@78 2798 let
adamc@78 2799 val kwild = (L.KWild, #2 str)
adamc@78 2800 val cwild = (L.CWild kwild, #2 str)
adamc@78 2801 val ds' = map (fn x => (L.DCon (x, NONE, cwild), #2 str)) xs
adamc@78 2802 in
adamc@78 2803 (L.StrConst (ds @ ds'), #2 str)
adamc@78 2804 end
adamc@78 2805 end
adamc@78 2806 | _ => str)
adamc@78 2807 | _ => str
adamc@78 2808
adamc@83 2809 val (str', actual, gs2) = elabStr (env, denv) str
adamc@78 2810 in
adamc@158 2811 subSgn (env, denv) (selfifyAt env {str = str', sgn = actual}) formal;
adamc@83 2812 (str', formal, gs1 @ gs2)
adamc@78 2813 end
adamc@76 2814
adamc@76 2815 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2816 in
adamc@76 2817 case #1 (hnormSgn env sgn') of
adamc@76 2818 L'.SgnFun _ =>
adamc@76 2819 (case #1 str' of
adamc@76 2820 L'.StrFun _ => ()
adamc@76 2821 | _ => strError env (FunctorRebind loc))
adamc@76 2822 | _ => ();
adamc@76 2823
adamc@88 2824 ([(L'.DStr (x, n, sgn', str'), loc)], (env', denv, gs' @ gs))
adamc@76 2825 end
adamc@76 2826
adamc@76 2827 | L.DFfiStr (x, sgn) =>
adamc@76 2828 let
adamc@83 2829 val (sgn', gs') = elabSgn (env, denv) sgn
adamc@76 2830
adamc@76 2831 val (env', n) = E.pushStrNamed env x sgn'
adamc@76 2832 in
adamc@88 2833 ([(L'.DFfiStr (x, n, sgn'), loc)], (env', denv, gs' @ gs))
adamc@76 2834 end
adamc@76 2835
adamc@76 2836 | L.DOpen (m, ms) =>
adamc@88 2837 (case E.lookupStr env m of
adamc@88 2838 NONE => (strError env (UnboundStr (loc, m));
adamc@205 2839 ([], (env, denv, gs)))
adamc@88 2840 | SOME (n, sgn) =>
adamc@88 2841 let
adamc@88 2842 val (_, sgn) = foldl (fn (m, (str, sgn)) =>
adamc@88 2843 case E.projectStr env {str = str, sgn = sgn, field = m} of
adamc@88 2844 NONE => (strError env (UnboundStr (loc, m));
adamc@88 2845 (strerror, sgnerror))
adamc@88 2846 | SOME sgn => ((L'.StrProj (str, m), loc), sgn))
adamc@88 2847 ((L'.StrVar n, loc), sgn) ms
adamc@83 2848
adamc@88 2849 val (ds, (env', denv')) = dopen (env, denv) {str = n, strs = ms, sgn = sgn}
adamc@88 2850 val denv' = dopenConstraints (loc, env', denv') {str = m, strs = ms}
adamc@88 2851 in
adamc@205 2852 (ds, (env', denv', gs))
adamc@88 2853 end)
adamc@88 2854
adamc@88 2855 | L.DConstraint (c1, c2) =>
adamc@88 2856 let
adamc@88 2857 val (c1', k1, gs1) = elabCon (env, denv) c1
adamc@88 2858 val (c2', k2, gs2) = elabCon (env, denv) c2
adamc@90 2859 val gs3 = D.prove env denv (c1', c2', loc)
adamc@88 2860
adamc@90 2861 val (denv', gs4) = D.assert env denv (c1', c2')
adamc@88 2862 in
adamc@88 2863 checkKind env c1' k1 (L'.KRecord (kunif loc), loc);
adamc@88 2864 checkKind env c2' k2 (L'.KRecord (kunif loc), loc);
adamc@88 2865
adamc@205 2866 ([(L'.DConstraint (c1', c2'), loc)], (env, denv', gs1 @ gs2 @ gs3 @ gs4 @ gs))
adamc@88 2867 end
adamc@88 2868
adamc@88 2869 | L.DOpenConstraints (m, ms) =>
adamc@88 2870 let
adamc@88 2871 val denv = dopenConstraints (loc, env, denv) {str = m, strs = ms}
adamc@88 2872 in
adamc@205 2873 ([], (env, denv, gs))
adamc@88 2874 end
adamc@3 2875
adamc@109 2876 | L.DExport str =>
adamc@100 2877 let
adamc@205 2878 val (str', sgn, gs') = elabStr (env, denv) str
adamc@100 2879
adamc@109 2880 val sgn =
adamc@109 2881 case #1 (hnormSgn env sgn) of
adamc@109 2882 L'.SgnConst sgis =>
adamc@109 2883 let
adamc@146 2884 fun doOne (all as (sgi, _), env) =
adamc@146 2885 (case sgi of
adamc@146 2886 L'.SgiVal (x, n, t) =>
adamc@146 2887 (case hnormCon (env, denv) t of
adamc@146 2888 ((L'.TFun (dom, ran), _), []) =>
adamc@146 2889 (case (hnormCon (env, denv) dom, hnormCon (env, denv) ran) of
adamc@146 2890 (((L'.TRecord domR, _), []),
adamc@146 2891 ((L'.CApp (tf, arg3), _), [])) =>
adamc@146 2892 (case (hnormCon (env, denv) tf, hnormCon (env, denv) arg3) of
adamc@146 2893 (((L'.CApp (tf, arg2), _), []),
adamc@146 2894 (((L'.CRecord (_, []), _), []))) =>
adamc@146 2895 (case (hnormCon (env, denv) tf) of
adamc@146 2896 ((L'.CApp (tf, arg1), _), []) =>
adamc@146 2897 (case (hnormCon (env, denv) tf,
adamc@146 2898 hnormCon (env, denv) domR,
adamc@152 2899 hnormCon (env, denv) arg1,
adamc@146 2900 hnormCon (env, denv) arg2) of
adamc@152 2901 ((tf, []), (domR, []), (arg1, []),
adamc@146 2902 ((L'.CRecord (_, []), _), [])) =>
adamc@146 2903 let
adamc@146 2904 val t = (L'.CApp (tf, arg1), loc)
adamc@146 2905 val t = (L'.CApp (t, arg2), loc)
adamc@146 2906 val t = (L'.CApp (t, arg3), loc)
adamc@146 2907 in
adamc@146 2908 (L'.SgiVal (x, n, (L'.TFun ((L'.TRecord domR, loc),
adamc@146 2909 t),
adamc@146 2910 loc)), loc)
adamc@146 2911 end
adamc@146 2912 | _ => all)
adamc@146 2913 | _ => all)
adamc@146 2914 | _ => all)
adamc@146 2915 | _ => all)
adamc@146 2916 | _ => all)
adamc@146 2917 | _ => all,
adamc@146 2918 E.sgiBinds env all)
adamc@109 2919 in
adamc@146 2920 (L'.SgnConst (#1 (ListUtil.foldlMap doOne env sgis)), loc)
adamc@109 2921 end
adamc@109 2922 | _ => sgn
adamc@100 2923 in
adamc@205 2924 ([(L'.DExport (E.newNamed (), sgn, str'), loc)], (env, denv, gs' @ gs))
adamc@100 2925 end
adamc@100 2926
adamc@203 2927 | L.DTable (x, c) =>
adamc@203 2928 let
adamc@205 2929 val (c', k, gs') = elabCon (env, denv) c
adamc@210 2930 val (env, n) = E.pushENamed env x (L'.CApp (tableOf (), c'), loc)
adamc@203 2931 in
adamc@203 2932 checkKind env c' k (L'.KRecord (L'.KType, loc), loc);
adamc@210 2933 ([(L'.DTable (!basis_r, x, n, c'), loc)], (env, denv, gs' @ gs))
adamc@203 2934 end
adamc@203 2935
adamc@211 2936 | L.DClass (x, c) =>
adamc@211 2937 let
adamc@211 2938 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 2939 val (c', ck, gs) = elabCon (env, denv) c
adamc@211 2940 val (env, n) = E.pushCNamed env x k (SOME c')
adamc@211 2941 val env = E.pushClass env n
adamc@211 2942 in
adamc@211 2943 checkKind env c' ck k;
adamc@211 2944 ([(L'.DCon (x, n, k, c'), loc)], (env, denv, []))
adamc@211 2945 end
adamc@211 2946
adamc@83 2947 and elabStr (env, denv) (str, loc) =
adamc@31 2948 case str of
adamc@31 2949 L.StrConst ds =>
adamc@31 2950 let
adamc@88 2951 val (ds', (_, _, gs)) = ListUtil.foldlMapConcat elabDecl (env, denv, []) ds
adamc@123 2952 val sgis = ListUtil.mapConcat sgiOfDecl ds'
adamc@63 2953
adamc@63 2954 val (sgis, _, _, _, _) =
adamc@64 2955 foldr (fn ((sgi, loc), (sgis, cons, vals, sgns, strs)) =>
adamc@63 2956 case sgi of
adamc@64 2957 L'.SgiConAbs (x, n, k) =>
adamc@64 2958 let
adamc@64 2959 val (cons, x) =
adamc@64 2960 if SS.member (cons, x) then
adamc@64 2961 (cons, "?" ^ x)
adamc@64 2962 else
adamc@64 2963 (SS.add (cons, x), x)
adamc@64 2964 in
adamc@64 2965 ((L'.SgiConAbs (x, n, k), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 2966 end
adamc@64 2967 | L'.SgiCon (x, n, k, c) =>
adamc@64 2968 let
adamc@64 2969 val (cons, x) =
adamc@64 2970 if SS.member (cons, x) then
adamc@64 2971 (cons, "?" ^ x)
adamc@64 2972 else
adamc@64 2973 (SS.add (cons, x), x)
adamc@64 2974 in
adamc@64 2975 ((L'.SgiCon (x, n, k, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 2976 end
adamc@191 2977 | L'.SgiDatatype (x, n, xs, xncs) =>
adamc@156 2978 let
adamc@156 2979 val (cons, x) =
adamc@156 2980 if SS.member (cons, x) then
adamc@156 2981 (cons, "?" ^ x)
adamc@156 2982 else
adamc@156 2983 (SS.add (cons, x), x)
adamc@156 2984
adamc@156 2985 val (xncs, vals) =
adamc@156 2986 ListUtil.foldlMap
adamc@156 2987 (fn ((x, n, t), vals) =>
adamc@156 2988 if SS.member (vals, x) then
adamc@156 2989 (("?" ^ x, n, t), vals)
adamc@156 2990 else
adamc@156 2991 ((x, n, t), SS.add (vals, x)))
adamc@156 2992 vals xncs
adamc@156 2993 in
adamc@191 2994 ((L'.SgiDatatype (x, n, xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 2995 end
adamc@191 2996 | L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@156 2997 let
adamc@156 2998 val (cons, x) =
adamc@156 2999 if SS.member (cons, x) then
adamc@156 3000 (cons, "?" ^ x)
adamc@156 3001 else
adamc@156 3002 (SS.add (cons, x), x)
adamc@156 3003 in
adamc@191 3004 ((L'.SgiDatatypeImp (x, n, m1, ms, x', xs, xncs), loc) :: sgis, cons, vals, sgns, strs)
adamc@156 3005 end
adamc@64 3006 | L'.SgiVal (x, n, c) =>
adamc@64 3007 let
adamc@64 3008 val (vals, x) =
adamc@64 3009 if SS.member (vals, x) then
adamc@64 3010 (vals, "?" ^ x)
adamc@64 3011 else
adamc@64 3012 (SS.add (vals, x), x)
adamc@64 3013 in
adamc@64 3014 ((L'.SgiVal (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3015 end
adamc@64 3016 | L'.SgiSgn (x, n, sgn) =>
adamc@64 3017 let
adamc@64 3018 val (sgns, x) =
adamc@64 3019 if SS.member (sgns, x) then
adamc@64 3020 (sgns, "?" ^ x)
adamc@64 3021 else
adamc@64 3022 (SS.add (sgns, x), x)
adamc@64 3023 in
adamc@64 3024 ((L'.SgiSgn (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@64 3025 end
adamc@64 3026
adamc@64 3027 | L'.SgiStr (x, n, sgn) =>
adamc@64 3028 let
adamc@64 3029 val (strs, x) =
adamc@64 3030 if SS.member (strs, x) then
adamc@64 3031 (strs, "?" ^ x)
adamc@64 3032 else
adamc@64 3033 (SS.add (strs, x), x)
adamc@64 3034 in
adamc@64 3035 ((L'.SgiStr (x, n, sgn), loc) :: sgis, cons, vals, sgns, strs)
adamc@88 3036 end
adamc@203 3037 | L'.SgiConstraint _ => ((sgi, loc) :: sgis, cons, vals, sgns, strs)
adamc@205 3038 | L'.SgiTable (tn, x, n, c) =>
adamc@203 3039 let
adamc@203 3040 val (vals, x) =
adamc@203 3041 if SS.member (vals, x) then
adamc@203 3042 (vals, "?" ^ x)
adamc@203 3043 else
adamc@203 3044 (SS.add (vals, x), x)
adamc@203 3045 in
adamc@205 3046 ((L'.SgiTable (tn, x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3047 end
adamc@211 3048 | L'.SgiClassAbs (x, n) =>
adamc@211 3049 let
adamc@211 3050 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3051
adamc@211 3052 val (cons, x) =
adamc@211 3053 if SS.member (cons, x) then
adamc@211 3054 (cons, "?" ^ x)
adamc@211 3055 else
adamc@211 3056 (SS.add (cons, x), x)
adamc@211 3057 in
adamc@211 3058 ((L'.SgiClassAbs (x, n), loc) :: sgis, cons, vals, sgns, strs)
adamc@211 3059 end
adamc@211 3060 | L'.SgiClass (x, n, c) =>
adamc@211 3061 let
adamc@211 3062 val k = (L'.KArrow ((L'.KType, loc), (L'.KType, loc)), loc)
adamc@211 3063
adamc@211 3064 val (cons, x) =
adamc@211 3065 if SS.member (cons, x) then
adamc@211 3066 (cons, "?" ^ x)
adamc@211 3067 else
adamc@211 3068 (SS.add (cons, x), x)
adamc@211 3069 in
adamc@211 3070 ((L'.SgiClass (x, n, c), loc) :: sgis, cons, vals, sgns, strs)
adamc@203 3071 end)
adamc@64 3072
adamc@63 3073 ([], SS.empty, SS.empty, SS.empty, SS.empty) sgis
adamc@31 3074 in
adamc@83 3075 ((L'.StrConst ds', loc), (L'.SgnConst sgis, loc), gs)
adamc@31 3076 end
adamc@31 3077 | L.StrVar x =>
adamc@31 3078 (case E.lookupStr env x of
adamc@31 3079 NONE =>
adamc@31 3080 (strError env (UnboundStr (loc, x));
adamc@83 3081 (strerror, sgnerror, []))
adamc@83 3082 | SOME (n, sgn) => ((L'.StrVar n, loc), sgn, []))
adamc@34 3083 | L.StrProj (str, x) =>
adamc@34 3084 let
adamc@83 3085 val (str', sgn, gs) = elabStr (env, denv) str
adamc@34 3086 in
adamc@34 3087 case E.projectStr env {str = str', sgn = sgn, field = x} of
adamc@34 3088 NONE => (strError env (UnboundStr (loc, x));
adamc@83 3089 (strerror, sgnerror, []))
adamc@83 3090 | SOME sgn => ((L'.StrProj (str', x), loc), sgn, gs)
adamc@34 3091 end
adamc@41 3092 | L.StrFun (m, dom, ranO, str) =>
adamc@41 3093 let
adamc@83 3094 val (dom', gs1) = elabSgn (env, denv) dom
adamc@41 3095 val (env', n) = E.pushStrNamed env m dom'
adamc@83 3096 val (str', actual, gs2) = elabStr (env', denv) str
adamc@41 3097
adamc@83 3098 val (formal, gs3) =
adamc@41 3099 case ranO of
adamc@83 3100 NONE => (actual, [])
adamc@41 3101 | SOME ran =>
adamc@41 3102 let
adamc@83 3103 val (ran', gs) = elabSgn (env', denv) ran
adamc@41 3104 in
adamc@86 3105 subSgn (env', denv) actual ran';
adamc@83 3106 (ran', gs)
adamc@41 3107 end
adamc@41 3108 in
adamc@41 3109 ((L'.StrFun (m, n, dom', formal, str'), loc),
adamc@83 3110 (L'.SgnFun (m, n, dom', formal), loc),
adamc@83 3111 gs1 @ gs2 @ gs3)
adamc@41 3112 end
adamc@44 3113 | L.StrApp (str1, str2) =>
adamc@44 3114 let
adamc@83 3115 val (str1', sgn1, gs1) = elabStr (env, denv) str1
adamc@83 3116 val (str2', sgn2, gs2) = elabStr (env, denv) str2
adamc@44 3117 in
adamc@44 3118 case #1 (hnormSgn env sgn1) of
adamc@83 3119 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3120 | L'.SgnFun (m, n, dom, ran) =>
adamc@86 3121 (subSgn (env, denv) sgn2 dom;
adamc@44 3122 case #1 (hnormSgn env ran) of
adamc@83 3123 L'.SgnError => (strerror, sgnerror, [])
adamc@44 3124 | L'.SgnConst sgis =>
adamc@44 3125 ((L'.StrApp (str1', str2'), loc),
adamc@83 3126 (L'.SgnConst ((L'.SgiStr (m, n, selfifyAt env {str = str2', sgn = sgn2}), loc) :: sgis), loc),
adamc@83 3127 gs1 @ gs2)
adamc@44 3128 | _ => raise Fail "Unable to hnormSgn in functor application")
adamc@44 3129 | _ => (strError env (NotFunctor sgn1);
adamc@83 3130 (strerror, sgnerror, []))
adamc@44 3131 end
adamc@31 3132
adamc@56 3133 fun elabFile basis env file =
adamc@56 3134 let
adamc@83 3135 val (sgn, gs) = elabSgn (env, D.empty) (L.SgnConst basis, ErrorMsg.dummySpan)
adamc@83 3136 val () = case gs of
adamc@83 3137 [] => ()
adamc@207 3138 | _ => (app (fn (_, env, _, c1, c2) =>
adamc@207 3139 prefaces "Unresolved"
adamc@207 3140 [("c1", p_con env c1),
adamc@207 3141 ("c2", p_con env c2)]) gs;
adamc@207 3142 raise Fail "Unresolved disjointness constraints in Basis")
adamc@83 3143
adamc@56 3144 val (env', basis_n) = E.pushStrNamed env "Basis" sgn
adamc@210 3145 val () = basis_r := basis_n
adamc@56 3146
adamc@88 3147 val (ds, (env', _)) = dopen (env', D.empty) {str = basis_n, strs = [], sgn = sgn}
adamc@56 3148
adamc@56 3149 fun discoverC r x =
adamc@56 3150 case E.lookupC env' x of
adamc@56 3151 E.NotBound => raise Fail ("Constructor " ^ x ^ " unbound in Basis")
adamc@56 3152 | E.Rel _ => raise Fail ("Constructor " ^ x ^ " bound relatively in Basis")
adamc@56 3153 | E.Named (n, (_, loc)) => r := (L'.CNamed n, loc)
adamc@56 3154
adamc@56 3155 val () = discoverC int "int"
adamc@56 3156 val () = discoverC float "float"
adamc@56 3157 val () = discoverC string "string"
adamc@203 3158 val () = discoverC table "sql_table"
adamc@56 3159
adamc@83 3160 fun elabDecl' (d, (env, gs)) =
adamc@76 3161 let
adamc@76 3162 val () = resetKunif ()
adamc@76 3163 val () = resetCunif ()
adamc@88 3164 val (ds, (env, _, gs)) = elabDecl (d, (env, D.empty, gs))
adamc@76 3165 in
adamc@76 3166 if ErrorMsg.anyErrors () then
adamc@76 3167 ()
adamc@76 3168 else (
adamc@76 3169 if List.exists kunifsInDecl ds then
adamc@91 3170 declError env (KunifsRemain ds)
adamc@76 3171 else
adamc@76 3172 ();
adamc@76 3173
adamc@76 3174 case ListUtil.search cunifsInDecl ds of
adamc@76 3175 NONE => ()
adamc@76 3176 | SOME loc =>
adamc@91 3177 declError env (CunifsRemain ds)
adamc@76 3178 );
adamc@76 3179
adamc@83 3180 (ds, (env, gs))
adamc@76 3181 end
adamc@76 3182
adamc@83 3183 val (file, (_, gs)) = ListUtil.foldlMapConcat elabDecl' (env', []) file
adamc@56 3184 in
adamc@84 3185 if ErrorMsg.anyErrors () then
adamc@84 3186 ()
adamc@84 3187 else
adamc@90 3188 app (fn (loc, env, denv, c1, c2) =>
adamc@84 3189 case D.prove env denv (c1, c2, loc) of
adamc@84 3190 [] => ()
adamc@84 3191 | _ =>
adamc@86 3192 (ErrorMsg.errorAt loc "Couldn't prove field name disjointness";
adamc@84 3193 eprefaces' [("Con 1", p_con env c1),
adamc@90 3194 ("Con 2", p_con env c2),
adamc@90 3195 ("Hnormed 1", p_con env (ElabOps.hnormCon env c1)),
adamc@90 3196 ("Hnormed 2", p_con env (ElabOps.hnormCon env c2))])) gs;
adamc@83 3197
adamc@56 3198 (L'.DFfiStr ("Basis", basis_n, sgn), ErrorMsg.dummySpan) :: ds @ file
adamc@56 3199 end
adamc@2 3200
adamc@2 3201 end