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annotate src/elab_env.sml @ 711:7292bcb7c02d

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Made type class system very general; demo compiles
author Adam Chlipala <adamc@hcoop.net>
date Thu, 09 Apr 2009 12:31:56 -0400
parents d8217b4cb617
children f152f215a02c
rev   line source
adamc@674 1 (* Copyright (c) 2008-2009, 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 ElabEnv :> ELAB_ENV = struct
adamc@2 29
adamc@2 30 open Elab
adamc@2 31
adamc@13 32 structure U = ElabUtil
adamc@13 33
adamc@2 34 structure IM = IntBinaryMap
adamc@2 35 structure SM = BinaryMapFn(struct
adamc@2 36 type ord_key = string
adamc@2 37 val compare = String.compare
adamc@2 38 end)
adamc@2 39
adamc@2 40 exception UnboundRel of int
adamc@2 41 exception UnboundNamed of int
adamc@2 42
adamc@13 43
adamc@13 44 (* AST utility functions *)
adamc@13 45
adamc@13 46 exception SynUnif
adamc@13 47
adamc@623 48 val liftKindInKind =
adamc@623 49 U.Kind.mapB {kind = fn bound => fn k =>
adamc@623 50 case k of
adamc@623 51 KRel xn =>
adamc@623 52 if xn < bound then
adamc@623 53 k
adamc@623 54 else
adamc@623 55 KRel (xn + 1)
adamc@623 56 | _ => k,
adamc@623 57 bind = fn (bound, _) => bound + 1}
adamc@623 58
adamc@623 59 val liftKindInCon =
adamc@623 60 U.Con.mapB {kind = fn bound => fn k =>
adamc@623 61 case k of
adamc@623 62 KRel xn =>
adamc@623 63 if xn < bound then
adamc@623 64 k
adamc@623 65 else
adamc@623 66 KRel (xn + 1)
adamc@623 67 | _ => k,
adamc@623 68 con = fn _ => fn c => c,
adamc@623 69 bind = fn (bound, U.Con.RelK _) => bound + 1
adamc@623 70 | (bound, _) => bound}
adamc@623 71
adamc@13 72 val liftConInCon =
adamc@623 73 U.Con.mapB {kind = fn _ => fn k => k,
adamc@13 74 con = fn bound => fn c =>
adamc@13 75 case c of
adamc@16 76 CRel xn =>
adamc@13 77 if xn < bound then
adamc@13 78 c
adamc@13 79 else
adamc@16 80 CRel (xn + 1)
adamc@17 81 (*| CUnif _ => raise SynUnif*)
adamc@13 82 | _ => c,
adamc@623 83 bind = fn (bound, U.Con.RelC _) => bound + 1
adamc@13 84 | (bound, _) => bound}
adamc@13 85
adamc@13 86 val lift = liftConInCon 0
adamc@13 87
adamc@623 88 val liftKindInExp =
adamc@623 89 U.Exp.mapB {kind = fn bound => fn k =>
adamc@623 90 case k of
adamc@623 91 KRel xn =>
adamc@623 92 if xn < bound then
adamc@623 93 k
adamc@623 94 else
adamc@623 95 KRel (xn + 1)
adamc@623 96 | _ => k,
adamc@623 97 con = fn _ => fn c => c,
adamc@623 98 exp = fn _ => fn e => e,
adamc@623 99 bind = fn (bound, U.Exp.RelK _) => bound + 1
adamc@623 100 | (bound, _) => bound}
adamc@623 101
adamc@448 102 val liftConInExp =
adamc@623 103 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@448 104 con = fn bound => fn c =>
adamc@448 105 case c of
adamc@448 106 CRel xn =>
adamc@448 107 if xn < bound then
adamc@448 108 c
adamc@448 109 else
adamc@448 110 CRel (xn + 1)
adamc@448 111 | _ => c,
adamc@448 112 exp = fn _ => fn e => e,
adamc@448 113 bind = fn (bound, U.Exp.RelC _) => bound + 1
adamc@448 114 | (bound, _) => bound}
adamc@448 115
adamc@211 116 val liftExpInExp =
adamc@623 117 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@211 118 con = fn _ => fn c => c,
adamc@211 119 exp = fn bound => fn e =>
adamc@211 120 case e of
adamc@211 121 ERel xn =>
adamc@211 122 if xn < bound then
adamc@211 123 e
adamc@211 124 else
adamc@211 125 ERel (xn + 1)
adamc@211 126 | _ => e,
adamc@211 127 bind = fn (bound, U.Exp.RelE _) => bound + 1
adamc@211 128 | (bound, _) => bound}
adamc@211 129
adamc@211 130
adamc@211 131 val liftExp = liftExpInExp 0
adamc@13 132
adamc@448 133 val subExpInExp =
adamc@623 134 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@448 135 con = fn _ => fn c => c,
adamc@448 136 exp = fn (xn, rep) => fn e =>
adamc@448 137 case e of
adamc@448 138 ERel xn' =>
adamc@448 139 (case Int.compare (xn', xn) of
adamc@448 140 EQUAL => #1 rep
adamc@448 141 | GREATER=> ERel (xn' - 1)
adamc@448 142 | LESS => e)
adamc@448 143 | _ => e,
adamc@448 144 bind = fn ((xn, rep), U.Exp.RelE _) => (xn+1, liftExpInExp 0 rep)
adamc@448 145 | ((xn, rep), U.Exp.RelC _) => (xn, liftConInExp 0 rep)
adamc@448 146 | (ctx, _) => ctx}
adamc@448 147
adamc@13 148 (* Back to environments *)
adamc@13 149
adamc@9 150 datatype 'a var' =
adamc@9 151 Rel' of int * 'a
adamc@9 152 | Named' of int * 'a
adamc@2 153
adamc@9 154 datatype 'a var =
adamc@9 155 NotBound
adamc@9 156 | Rel of int * 'a
adamc@9 157 | Named of int * 'a
adamc@2 158
adamc@191 159 type datatyp = string list * (string * con option) IM.map
adamc@157 160
adamc@211 161 datatype class_name =
adamc@211 162 ClNamed of int
adamc@211 163 | ClProj of int * string list * string
adamc@211 164
adamc@711 165 fun class_name_out cn =
adamc@711 166 case cn of
adamc@711 167 ClNamed n => (CNamed n, ErrorMsg.dummySpan)
adamc@711 168 | ClProj x => (CModProj x, ErrorMsg.dummySpan)
adamc@711 169
adamc@216 170 fun cn2s cn =
adamc@216 171 case cn of
adamc@216 172 ClNamed n => "Named(" ^ Int.toString n ^ ")"
adamc@216 173 | ClProj (m, ms, x) => "Proj(" ^ Int.toString m ^ "," ^ String.concatWith "," ms ^ "," ^ x ^ ")"
adamc@216 174
adamc@211 175 structure CK = struct
adamc@211 176 type ord_key = class_name
adamc@211 177 open Order
adamc@211 178 fun compare x =
adamc@211 179 case x of
adamc@211 180 (ClNamed n1, ClNamed n2) => Int.compare (n1, n2)
adamc@211 181 | (ClNamed _, _) => LESS
adamc@211 182 | (_, ClNamed _) => GREATER
adamc@211 183
adamc@211 184 | (ClProj (m1, ms1, x1), ClProj (m2, ms2, x2)) =>
adamc@211 185 join (Int.compare (m1, m2),
adamc@211 186 fn () => join (joinL String.compare (ms1, ms2),
adamc@211 187 fn () => String.compare (x1, x2)))
adamc@211 188 end
adamc@211 189
adamc@677 190 structure CS = BinarySetFn(CK)
adamc@211 191 structure CM = BinaryMapFn(CK)
adamc@211 192
adamc@711 193 type class = {ground : (con * exp) list,
adamc@711 194 rules : (int * con list * con * exp) list}
adamc@711 195 val empty_class = {ground = [],
adamc@711 196 rules = []}
adamc@216 197
adamc@2 198 type env = {
adamc@623 199 renameK : int SM.map,
adamc@623 200 relK : string list,
adamc@623 201
adamc@9 202 renameC : kind var' SM.map,
adamc@2 203 relC : (string * kind) list,
adamc@11 204 namedC : (string * kind * con option) IM.map,
adamc@9 205
adamc@157 206 datatypes : datatyp IM.map,
adamc@191 207 constructors : (datatype_kind * int * string list * con option * int) SM.map,
adamc@157 208
adamc@211 209 classes : class CM.map,
adamc@211 210
adamc@9 211 renameE : con var' SM.map,
adamc@9 212 relE : (string * con) list,
adamc@31 213 namedE : (string * con) IM.map,
adamc@31 214
adamc@31 215 renameSgn : (int * sgn) SM.map,
adamc@31 216 sgn : (string * sgn) IM.map,
adamc@31 217
adamc@31 218 renameStr : (int * sgn) SM.map,
adamc@31 219 str : (string * sgn) IM.map
adamc@2 220 }
adamc@2 221
adamc@2 222 val namedCounter = ref 0
adamc@2 223
adamc@109 224 fun newNamed () =
adamc@109 225 let
adamc@109 226 val r = !namedCounter
adamc@109 227 in
adamc@109 228 namedCounter := r + 1;
adamc@109 229 r
adamc@109 230 end
adamc@109 231
adamc@2 232 val empty = {
adamc@623 233 renameK = SM.empty,
adamc@623 234 relK = [],
adamc@623 235
adamc@2 236 renameC = SM.empty,
adamc@2 237 relC = [],
adamc@9 238 namedC = IM.empty,
adamc@9 239
adamc@157 240 datatypes = IM.empty,
adamc@171 241 constructors = SM.empty,
adamc@157 242
adamc@211 243 classes = CM.empty,
adamc@211 244
adamc@9 245 renameE = SM.empty,
adamc@9 246 relE = [],
adamc@31 247 namedE = IM.empty,
adamc@31 248
adamc@31 249 renameSgn = SM.empty,
adamc@31 250 sgn = IM.empty,
adamc@31 251
adamc@31 252 renameStr = SM.empty,
adamc@31 253 str = IM.empty
adamc@2 254 }
adamc@2 255
adamc@623 256 fun pushKRel (env : env) x =
adamc@623 257 let
adamc@623 258 val renameK = SM.map (fn n => n+1) (#renameK env)
adamc@623 259 in
adamc@623 260 {renameK = SM.insert (renameK, x, 0),
adamc@623 261 relK = x :: #relK env,
adamc@623 262
adamc@623 263 renameC = SM.map (fn Rel' (n, k) => Rel' (n, liftKindInKind 0 k)
adamc@623 264 | x => x) (#renameC env),
adamc@623 265 relC = map (fn (x, k) => (x, liftKindInKind 0 k)) (#relC env),
adamc@623 266 namedC = #namedC env,
adamc@623 267
adamc@623 268 datatypes = #datatypes env,
adamc@623 269 constructors = #constructors env,
adamc@623 270
adamc@711 271 classes = CM.map (fn cl => {ground = map (fn (c, e) =>
adamc@711 272 (liftKindInCon 0 c,
adamc@711 273 e))
adamc@711 274 (#ground cl),
adamc@711 275 rules = #rules cl})
adamc@711 276 (#classes env),
adamc@623 277
adamc@623 278 renameE = SM.map (fn Rel' (n, c) => Rel' (n, liftKindInCon 0 c)
adamc@623 279 | Named' (n, c) => Named' (n, c)) (#renameE env),
adamc@623 280 relE = map (fn (x, c) => (x, liftKindInCon 0 c)) (#relE env),
adamc@623 281 namedE = #namedE env,
adamc@623 282
adamc@623 283 renameSgn = #renameSgn env,
adamc@623 284 sgn = #sgn env,
adamc@623 285
adamc@623 286 renameStr = #renameStr env,
adamc@623 287 str = #str env
adamc@623 288 }
adamc@623 289 end
adamc@623 290
adamc@623 291 fun lookupKRel (env : env) n =
adamc@623 292 (List.nth (#relK env, n))
adamc@623 293 handle Subscript => raise UnboundRel n
adamc@623 294
adamc@623 295 fun lookupK (env : env) x = SM.find (#renameK env, x)
adamc@623 296
adamc@2 297 fun pushCRel (env : env) x k =
adamc@2 298 let
adamc@9 299 val renameC = SM.map (fn Rel' (n, k) => Rel' (n+1, k)
adamc@2 300 | x => x) (#renameC env)
adamc@2 301 in
adamc@623 302 {renameK = #renameK env,
adamc@623 303 relK = #relK env,
adamc@623 304
adamc@623 305 renameC = SM.insert (renameC, x, Rel' (0, k)),
adamc@2 306 relC = (x, k) :: #relC env,
adamc@514 307 namedC = #namedC env,
adamc@9 308
adamc@157 309 datatypes = #datatypes env,
adamc@171 310 constructors = #constructors env,
adamc@157 311
adamc@674 312 classes = CM.map (fn class =>
adamc@711 313 {ground = map (fn (c, e) =>
adamc@711 314 (liftConInCon 0 c,
adamc@711 315 e))
adamc@711 316 (#ground class),
adamc@711 317 rules = #rules class})
adamc@211 318 (#classes env),
adamc@211 319
adamc@328 320 renameE = SM.map (fn Rel' (n, c) => Rel' (n, lift c)
adamc@517 321 | Named' (n, c) => Named' (n, c)) (#renameE env),
adamc@13 322 relE = map (fn (x, c) => (x, lift c)) (#relE env),
adamc@514 323 namedE = #namedE env,
adamc@31 324
adamc@31 325 renameSgn = #renameSgn env,
adamc@31 326 sgn = #sgn env,
adamc@31 327
adamc@31 328 renameStr = #renameStr env,
adamc@31 329 str = #str env
adamc@31 330 }
adamc@2 331 end
adamc@2 332
adamc@2 333 fun lookupCRel (env : env) n =
adamc@2 334 (List.nth (#relC env, n))
adamc@2 335 handle Subscript => raise UnboundRel n
adamc@2 336
adamc@11 337 fun pushCNamedAs (env : env) x n k co =
adamc@623 338 {renameK = #renameK env,
adamc@623 339 relK = #relK env,
adamc@623 340
adamc@623 341 renameC = SM.insert (#renameC env, x, Named' (n, k)),
adamc@5 342 relC = #relC env,
adamc@11 343 namedC = IM.insert (#namedC env, n, (x, k, co)),
adamc@9 344
adamc@157 345 datatypes = #datatypes env,
adamc@171 346 constructors = #constructors env,
adamc@157 347
adamc@211 348 classes = #classes env,
adamc@211 349
adamc@9 350 renameE = #renameE env,
adamc@9 351 relE = #relE env,
adamc@31 352 namedE = #namedE env,
adamc@31 353
adamc@31 354 renameSgn = #renameSgn env,
adamc@31 355 sgn = #sgn env,
adamc@31 356
adamc@31 357 renameStr = #renameStr env,
adamc@31 358 str = #str env}
adamc@5 359
adamc@11 360 fun pushCNamed env x k co =
adamc@2 361 let
adamc@2 362 val n = !namedCounter
adamc@2 363 in
adamc@2 364 namedCounter := n + 1;
adamc@11 365 (pushCNamedAs env x n k co, n)
adamc@2 366 end
adamc@2 367
adamc@2 368 fun lookupCNamed (env : env) n =
adamc@2 369 case IM.find (#namedC env, n) of
adamc@2 370 NONE => raise UnboundNamed n
adamc@2 371 | SOME x => x
adamc@2 372
adamc@2 373 fun lookupC (env : env) x =
adamc@2 374 case SM.find (#renameC env, x) of
adamc@9 375 NONE => NotBound
adamc@9 376 | SOME (Rel' x) => Rel x
adamc@9 377 | SOME (Named' x) => Named x
adamc@9 378
adamc@191 379 fun pushDatatype (env : env) n xs xncs =
adamc@188 380 let
adamc@188 381 val dk = U.classifyDatatype xncs
adamc@188 382 in
adamc@623 383 {renameK = #renameK env,
adamc@623 384 relK = #relK env,
adamc@623 385
adamc@623 386 renameC = #renameC env,
adamc@188 387 relC = #relC env,
adamc@188 388 namedC = #namedC env,
adamc@157 389
adamc@188 390 datatypes = IM.insert (#datatypes env, n,
adamc@191 391 (xs, foldl (fn ((x, n, to), cons) =>
adamc@191 392 IM.insert (cons, n, (x, to))) IM.empty xncs)),
adamc@188 393 constructors = foldl (fn ((x, n', to), cmap) =>
adamc@191 394 SM.insert (cmap, x, (dk, n', xs, to, n)))
adamc@188 395 (#constructors env) xncs,
adamc@157 396
adamc@211 397 classes = #classes env,
adamc@211 398
adamc@188 399 renameE = #renameE env,
adamc@188 400 relE = #relE env,
adamc@188 401 namedE = #namedE env,
adamc@157 402
adamc@188 403 renameSgn = #renameSgn env,
adamc@188 404 sgn = #sgn env,
adamc@157 405
adamc@188 406 renameStr = #renameStr env,
adamc@188 407 str = #str env}
adamc@188 408 end
adamc@157 409
adamc@157 410 fun lookupDatatype (env : env) n =
adamc@157 411 case IM.find (#datatypes env, n) of
adamc@157 412 NONE => raise UnboundNamed n
adamc@157 413 | SOME x => x
adamc@157 414
adamc@191 415 fun lookupDatatypeConstructor (_, dt) n =
adamc@157 416 case IM.find (dt, n) of
adamc@157 417 NONE => raise UnboundNamed n
adamc@157 418 | SOME x => x
adamc@157 419
adamc@171 420 fun lookupConstructor (env : env) s = SM.find (#constructors env, s)
adamc@171 421
adamc@191 422 fun datatypeArgs (xs, _) = xs
adamc@191 423 fun constructors (_, dt) = IM.foldri (fn (n, (x, to), ls) => (x, n, to) :: ls) [] dt
adamc@157 424
adamc@711 425 fun listClasses (env : env) =
adamc@711 426 map (fn (cn, {ground, rules}) =>
adamc@711 427 (class_name_out cn,
adamc@711 428 ground
adamc@711 429 @ map (fn (nvs, cs, c, e) =>
adamc@711 430 let
adamc@711 431 val loc = #2 c
adamc@711 432 val c = foldr (fn (c', c) => (TFun (c', c), loc)) c cs
adamc@711 433 val c = ListUtil.foldli (fn (n, (), c) => (TCFun (Explicit,
adamc@711 434 "x" ^ Int.toString n,
adamc@711 435 (KError, loc),
adamc@711 436 c), loc))
adamc@711 437 c (List.tabulate (nvs, fn _ => ()))
adamc@711 438 in
adamc@711 439 (c, e)
adamc@711 440 end) rules)) (CM.listItemsi (#classes env))
adamc@711 441
adamc@211 442 fun pushClass (env : env) n =
adamc@623 443 {renameK = #renameK env,
adamc@623 444 relK = #relK env,
adamc@623 445
adamc@623 446 renameC = #renameC env,
adamc@211 447 relC = #relC env,
adamc@211 448 namedC = #namedC env,
adamc@211 449
adamc@211 450 datatypes = #datatypes env,
adamc@211 451 constructors = #constructors env,
adamc@211 452
adamc@675 453 classes = CM.insert (#classes env, ClNamed n, empty_class),
adamc@211 454
adamc@211 455 renameE = #renameE env,
adamc@211 456 relE = #relE env,
adamc@211 457 namedE = #namedE env,
adamc@211 458
adamc@211 459 renameSgn = #renameSgn env,
adamc@211 460 sgn = #sgn env,
adamc@211 461
adamc@211 462 renameStr = #renameStr env,
adamc@403 463 str = #str env}
adamc@211 464
adamc@211 465 fun class_name_in (c, _) =
adamc@211 466 case c of
adamc@211 467 CNamed n => SOME (ClNamed n)
adamc@211 468 | CModProj x => SOME (ClProj x)
adamc@228 469 | CUnif (_, _, _, ref (SOME c)) => class_name_in c
adamc@211 470 | _ => NONE
adamc@211 471
adamc@403 472 fun isClass (env : env) c =
adamc@403 473 let
adamc@403 474 fun find NONE = false
adamc@403 475 | find (SOME c) = Option.isSome (CM.find (#classes env, c))
adamc@403 476 in
adamc@403 477 find (class_name_in c)
adamc@403 478 end
adamc@403 479
adamc@711 480 fun class_head_in c =
adamc@711 481 case #1 c of
adamc@711 482 CApp (f, _) => class_head_in f
adamc@711 483 | CUnif (_, _, _, ref (SOME c)) => class_head_in c
adamc@711 484 | _ => class_name_in c
adamc@211 485
adamc@711 486 exception Unify
adamc@711 487
adamc@711 488 fun unifyKinds (k1, k2) =
adamc@711 489 case (#1 k1, #1 k2) of
adamc@711 490 (KType, KType) => ()
adamc@711 491 | (KArrow (d1, r1), KArrow (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@711 492 | (KName, KName) => ()
adamc@711 493 | (KRecord k1, KRecord k2) => unifyKinds (k1, k2)
adamc@711 494 | (KUnit, KUnit) => ()
adamc@711 495 | (KTuple ks1, KTuple ks2) => (ListPair.appEq unifyKinds (ks1, ks2)
adamc@711 496 handle ListPair.UnequalLengths => raise Unify)
adamc@711 497 | (KUnif (_, _, ref (SOME k1)), _) => unifyKinds (k1, k2)
adamc@711 498 | (_, KUnif (_, _, ref (SOME k2))) => unifyKinds (k1, k2)
adamc@711 499 | (KRel n1, KRel n2) => if n1 = n2 then () else raise Unify
adamc@711 500 | (KFun (_, k1), KFun (_, k2)) => unifyKinds (k1, k2)
adamc@711 501 | _ => raise Unify
adamc@711 502
adamc@711 503 fun unifyCons rs =
adamc@674 504 let
adamc@711 505 fun unify d (c1, c2) =
adamc@711 506 case (#1 c1, #1 c2) of
adamc@711 507 (CUnif (_, _, _, ref (SOME c1)), _) => unify d (c1, c2)
adamc@711 508 | (_, CUnif (_, _, _, ref (SOME c2))) => unify d (c1, c2)
adamc@711 509
adamc@711 510 | (c1', CRel n2) =>
adamc@711 511 if n2 < d then
adamc@711 512 case c1' of
adamc@711 513 CRel n1 => if n1 = n2 then () else raise Unify
adamc@711 514 | _ => raise Unify
adamc@711 515 else if n2 - d >= length rs then
adamc@711 516 case c1' of
adamc@711 517 CRel n1 => if n1 = n2 - length rs then () else raise Unify
adamc@711 518 | _ => raise Unify
adamc@711 519 else
adamc@711 520 let
adamc@711 521 val r = List.nth (rs, n2 - d)
adamc@711 522 in
adamc@711 523 case !r of
adamc@711 524 NONE => r := SOME c1
adamc@711 525 | SOME c2 => unify d (c1, c2)
adamc@711 526 end
adamc@711 527
adamc@711 528 | (TFun (d1, r1), TFun (d2, r2)) => (unify d (d1, d2); unify d (r1, r2))
adamc@711 529 | (TCFun (_, _, k1, r1), TCFun (_, _, k2, r2)) => (unifyKinds (k1, k2); unify (d + 1) (r1, r2))
adamc@711 530 | (TRecord c1, TRecord c2) => unify d (c1, c2)
adamc@711 531 | (TDisjoint (a1, b1, c1), TDisjoint (a2, b2, c2)) =>
adamc@711 532 (unify d (a1, a2); unify d (b1, b2); unify d (c1, c2))
adamc@711 533
adamc@711 534 | (CNamed n1, CNamed n2) => if n1 = n2 then () else raise Unify
adamc@711 535 | (CModProj (n1, ms1, x1), CModProj (n2, ms2, x2)) =>
adamc@711 536 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then () else raise Unify
adamc@711 537 | (CApp (f1, x1), CApp (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 538 | (CAbs (_, k1, b1), CAbs (_, k2, b2)) => (unifyKinds (k1, k2); unify (d + 1) (b1, b2))
adamc@711 539
adamc@711 540 | (CKAbs (_, b1), CKAbs (_, b2)) => unify d (b1, b2)
adamc@711 541 | (CKApp (c1, k1), CKApp (c2, k2)) => (unify d (c1, c2); unifyKinds (k1, k2))
adamc@711 542 | (TKFun (_, c1), TKFun (_, c2)) => unify d (c1, c2)
adamc@711 543
adamc@711 544 | (CName s1, CName s2) => if s1 = s2 then () else raise Unify
adamc@711 545
adamc@711 546 | (CRecord (k1, xcs1), CRecord (k2, xcs2)) =>
adamc@711 547 (unifyKinds (k1, k2);
adamc@711 548 ListPair.appEq (fn ((x1, c1), (x2, c2)) => (unify d (x1, x2); unify d (c1, c2))) (xcs1, xcs2)
adamc@711 549 handle ListPair.UnequalLengths => raise Unify)
adamc@711 550 | (CConcat (f1, x1), CConcat (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 551 | (CMap (d1, r1), CMap (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@711 552
adamc@711 553 | (CUnit, CUnit) => ()
adamc@711 554
adamc@711 555 | (CTuple cs1, CTuple cs2) => (ListPair.appEq (unify d) (cs1, cs2)
adamc@711 556 handle ListPair.UnequalLengths => raise Unify)
adamc@711 557 | (CProj (c1, n1), CProj (c2, n2)) => (unify d (c1, c2);
adamc@711 558 if n1 = n2 then () else raise Unify)
adamc@711 559
adamc@711 560 | _ => raise Unify
adamc@674 561 in
adamc@711 562 unify
adamc@674 563 end
adamc@674 564
adamc@711 565 fun tryUnify nRs (c1, c2) =
adamc@674 566 let
adamc@711 567 val rs = List.tabulate (nRs, fn _ => ref NONE)
adamc@674 568 in
adamc@711 569 (unifyCons rs 0 (c1, c2);
adamc@711 570 SOME (map (fn r => case !r of
adamc@711 571 NONE => raise Unify
adamc@711 572 | SOME c => c) rs))
adamc@711 573 handle Unify => NONE
adamc@674 574 end
adamc@674 575
adamc@711 576 fun unifySubst (rs : con list) =
adamc@711 577 U.Con.mapB {kind = fn _ => fn k => k,
adamc@711 578 con = fn d => fn c =>
adamc@711 579 case c of
adamc@711 580 CRel n =>
adamc@711 581 if n < d then
adamc@711 582 c
adamc@711 583 else
adamc@711 584 #1 (List.nth (rs, n - d))
adamc@711 585 | _ => c,
adamc@711 586 bind = fn (d, U.Con.RelC _) => d + 1
adamc@711 587 | (d, _) => d}
adamc@711 588 0
adamc@711 589
adamc@711 590 fun resolveClass (env : env) =
adamc@674 591 let
adamc@711 592 fun resolve c =
adamc@711 593 let
adamc@711 594 fun doHead f =
adamc@711 595 case CM.find (#classes env, f) of
adamc@711 596 NONE => NONE
adamc@711 597 | SOME class =>
adamc@711 598 let
adamc@711 599 val loc = #2 c
adamc@675 600
adamc@711 601 fun tryRules rules =
adamc@711 602 case rules of
adamc@675 603 [] => NONE
adamc@711 604 | (nRs, cs, c', e) :: rules' =>
adamc@711 605 case tryUnify nRs (c, c') of
adamc@711 606 NONE => tryRules rules'
adamc@711 607 | SOME rs =>
adamc@675 608 let
adamc@711 609 val eos = map (resolve o unifySubst rs) cs
adamc@675 610 in
adamc@711 611 if List.exists (not o Option.isSome) eos then
adamc@711 612 tryRules rules'
adamc@711 613 else
adamc@711 614 let
adamc@711 615 val es = List.mapPartial (fn x => x) eos
adamc@711 616
adamc@711 617 val e = foldr (fn (c, e) => (ECApp (e, c), loc)) e rs
adamc@711 618 val e = foldl (fn (e', e) => (EApp (e, e'), loc)) e es
adamc@711 619 in
adamc@711 620 SOME e
adamc@711 621 end
adamc@675 622 end
adamc@711 623
adamc@711 624 fun rules () = tryRules (#rules class)
adamc@711 625
adamc@711 626 fun tryGrounds ces =
adamc@711 627 case ces of
adamc@711 628 [] => rules ()
adamc@711 629 | (c', e) :: ces' =>
adamc@711 630 case tryUnify 0 (c, c') of
adamc@711 631 NONE => tryGrounds ces'
adamc@711 632 | SOME _ => SOME e
adamc@675 633 in
adamc@711 634 tryGrounds (#ground class)
adamc@675 635 end
adamc@711 636 in
adamc@711 637 case class_head_in c of
adamc@711 638 SOME f => doHead f
adamc@711 639 | _ => NONE
adamc@711 640 end
adamc@674 641 in
adamc@711 642 resolve
adamc@674 643 end
adamc@211 644
adamc@9 645 fun pushERel (env : env) x t =
adamc@9 646 let
adamc@9 647 val renameE = SM.map (fn Rel' (n, t) => Rel' (n+1, t)
adamc@9 648 | x => x) (#renameE env)
adamc@211 649
adamc@675 650 val classes = CM.map (fn class =>
adamc@711 651 {ground = map (fn (c, e) => (c, liftExp e)) (#ground class),
adamc@711 652 rules = #rules class}) (#classes env)
adamc@711 653 val classes = case class_head_in t of
adamc@211 654 NONE => classes
adamc@711 655 | SOME f =>
adamc@403 656 case CM.find (classes, f) of
adamc@403 657 NONE => classes
adamc@403 658 | SOME class =>
adamc@403 659 let
adamc@711 660 val class = {ground = (t, (ERel 0, #2 t)) :: #ground class,
adamc@711 661 rules = #rules class}
adamc@403 662 in
adamc@403 663 CM.insert (classes, f, class)
adamc@403 664 end
adamc@9 665 in
adamc@623 666 {renameK = #renameK env,
adamc@623 667 relK = #relK env,
adamc@623 668
adamc@623 669 renameC = #renameC env,
adamc@9 670 relC = #relC env,
adamc@9 671 namedC = #namedC env,
adamc@9 672
adamc@157 673 datatypes = #datatypes env,
adamc@171 674 constructors = #constructors env,
adamc@157 675
adamc@211 676 classes = classes,
adamc@211 677
adamc@9 678 renameE = SM.insert (renameE, x, Rel' (0, t)),
adamc@9 679 relE = (x, t) :: #relE env,
adamc@31 680 namedE = #namedE env,
adamc@31 681
adamc@31 682 renameSgn = #renameSgn env,
adamc@31 683 sgn = #sgn env,
adamc@31 684
adamc@31 685 renameStr = #renameStr env,
adamc@31 686 str = #str env}
adamc@9 687 end
adamc@9 688
adamc@9 689 fun lookupERel (env : env) n =
adamc@9 690 (List.nth (#relE env, n))
adamc@9 691 handle Subscript => raise UnboundRel n
adamc@9 692
adamc@674 693 fun rule_in c =
adamc@674 694 let
adamc@674 695 fun quantifiers (c, nvars) =
adamc@674 696 case #1 c of
adamc@674 697 TCFun (_, _, _, c) => quantifiers (c, nvars + 1)
adamc@674 698 | _ =>
adamc@674 699 let
adamc@674 700 fun clauses (c, hyps) =
adamc@674 701 case #1 c of
adamc@674 702 TFun (hyp, c) =>
adamc@711 703 (case class_head_in hyp of
adamc@711 704 SOME _ => clauses (c, hyp :: hyps)
adamc@711 705 | NONE => NONE)
adamc@674 706 | _ =>
adamc@711 707 case class_head_in c of
adamc@674 708 NONE => NONE
adamc@711 709 | SOME f => SOME (f, nvars, rev hyps, c)
adamc@674 710 in
adamc@674 711 clauses (c, [])
adamc@674 712 end
adamc@674 713 in
adamc@711 714 quantifiers (c, 0)
adamc@677 715 end
adamc@677 716
adamc@9 717 fun pushENamedAs (env : env) x n t =
adamc@211 718 let
adamc@211 719 val classes = #classes env
adamc@674 720 val classes = case rule_in t of
adamc@211 721 NONE => classes
adamc@711 722 | SOME (f, nvs, cs, c) =>
adamc@403 723 case CM.find (classes, f) of
adamc@403 724 NONE => classes
adamc@403 725 | SOME class =>
adamc@403 726 let
adamc@675 727 val e = (ENamed n, #2 t)
adamc@675 728
adamc@675 729 val class =
adamc@711 730 {ground = #ground class,
adamc@711 731 rules = (nvs, cs, c, e) :: #rules class}
adamc@403 732 in
adamc@403 733 CM.insert (classes, f, class)
adamc@403 734 end
adamc@211 735 in
adamc@623 736 {renameK = #renameK env,
adamc@623 737 relK = #relK env,
adamc@623 738
adamc@623 739 renameC = #renameC env,
adamc@211 740 relC = #relC env,
adamc@211 741 namedC = #namedC env,
adamc@9 742
adamc@211 743 datatypes = #datatypes env,
adamc@211 744 constructors = #constructors env,
adamc@157 745
adamc@211 746 classes = classes,
adamc@31 747
adamc@211 748 renameE = SM.insert (#renameE env, x, Named' (n, t)),
adamc@211 749 relE = #relE env,
adamc@211 750 namedE = IM.insert (#namedE env, n, (x, t)),
adamc@211 751
adamc@211 752 renameSgn = #renameSgn env,
adamc@211 753 sgn = #sgn env,
adamc@211 754
adamc@211 755 renameStr = #renameStr env,
adamc@211 756 str = #str env}
adamc@211 757 end
adamc@9 758
adamc@9 759 fun pushENamed env x t =
adamc@9 760 let
adamc@9 761 val n = !namedCounter
adamc@9 762 in
adamc@9 763 namedCounter := n + 1;
adamc@9 764 (pushENamedAs env x n t, n)
adamc@9 765 end
adamc@9 766
adamc@9 767 fun lookupENamed (env : env) n =
adamc@9 768 case IM.find (#namedE env, n) of
adamc@9 769 NONE => raise UnboundNamed n
adamc@9 770 | SOME x => x
adamc@9 771
adamc@471 772 fun checkENamed (env : env) n =
adamc@471 773 Option.isSome (IM.find (#namedE env, n))
adamc@471 774
adamc@9 775 fun lookupE (env : env) x =
adamc@9 776 case SM.find (#renameE env, x) of
adamc@9 777 NONE => NotBound
adamc@9 778 | SOME (Rel' x) => Rel x
adamc@9 779 | SOME (Named' x) => Named x
adamc@2 780
adamc@31 781 fun pushSgnNamedAs (env : env) x n sgis =
adamc@623 782 {renameK = #renameK env,
adamc@623 783 relK = #relK env,
adamc@623 784
adamc@623 785 renameC = #renameC env,
adamc@31 786 relC = #relC env,
adamc@31 787 namedC = #namedC env,
adamc@31 788
adamc@157 789 datatypes = #datatypes env,
adamc@171 790 constructors = #constructors env,
adamc@157 791
adamc@211 792 classes = #classes env,
adamc@211 793
adamc@31 794 renameE = #renameE env,
adamc@31 795 relE = #relE env,
adamc@31 796 namedE = #namedE env,
adamc@31 797
adamc@31 798 renameSgn = SM.insert (#renameSgn env, x, (n, sgis)),
adamc@31 799 sgn = IM.insert (#sgn env, n, (x, sgis)),
adamc@31 800
adamc@31 801 renameStr = #renameStr env,
adamc@31 802 str = #str env}
adamc@31 803
adamc@31 804 fun pushSgnNamed env x sgis =
adamc@31 805 let
adamc@31 806 val n = !namedCounter
adamc@31 807 in
adamc@31 808 namedCounter := n + 1;
adamc@31 809 (pushSgnNamedAs env x n sgis, n)
adamc@31 810 end
adamc@31 811
adamc@31 812 fun lookupSgnNamed (env : env) n =
adamc@31 813 case IM.find (#sgn env, n) of
adamc@31 814 NONE => raise UnboundNamed n
adamc@31 815 | SOME x => x
adamc@31 816
adamc@31 817 fun lookupSgn (env : env) x = SM.find (#renameSgn env, x)
adamc@31 818
adamc@31 819 fun lookupStrNamed (env : env) n =
adamc@31 820 case IM.find (#str env, n) of
adamc@31 821 NONE => raise UnboundNamed n
adamc@31 822 | SOME x => x
adamc@31 823
adamc@31 824 fun lookupStr (env : env) x = SM.find (#renameStr env, x)
adamc@31 825
adamc@203 826
adamc@216 827 fun sgiSeek (sgi, (sgns, strs, cons)) =
adamc@216 828 case sgi of
adamc@216 829 SgiConAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 830 | SgiCon (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 831 | SgiDatatype (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 832 | SgiDatatypeImp (x, n, _, _, _, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 833 | SgiVal _ => (sgns, strs, cons)
adamc@216 834 | SgiSgn (x, n, _) => (IM.insert (sgns, n, x), strs, cons)
adamc@216 835 | SgiStr (x, n, _) => (sgns, IM.insert (strs, n, x), cons)
adamc@216 836 | SgiConstraint _ => (sgns, strs, cons)
adamc@563 837 | SgiClassAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@563 838 | SgiClass (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 839
adamc@34 840 fun sgnSeek f sgis =
adamc@34 841 let
adamc@59 842 fun seek (sgis, sgns, strs, cons) =
adamc@34 843 case sgis of
adamc@34 844 [] => NONE
adamc@34 845 | (sgi, _) :: sgis =>
adamc@34 846 case f sgi of
adamc@158 847 SOME v =>
adamc@158 848 let
adamc@158 849 val cons =
adamc@158 850 case sgi of
adamc@191 851 SgiDatatype (x, n, _, _) => IM.insert (cons, n, x)
adamc@191 852 | SgiDatatypeImp (x, n, _, _, _, _, _) => IM.insert (cons, n, x)
adamc@158 853 | _ => cons
adamc@158 854 in
adamc@158 855 SOME (v, (sgns, strs, cons))
adamc@158 856 end
adamc@88 857 | NONE =>
adamc@216 858 let
adamc@216 859 val (sgns, strs, cons) = sgiSeek (sgi, (sgns, strs, cons))
adamc@216 860 in
adamc@216 861 seek (sgis, sgns, strs, cons)
adamc@216 862 end
adamc@34 863 in
adamc@59 864 seek (sgis, IM.empty, IM.empty, IM.empty)
adamc@34 865 end
adamc@34 866
adamc@34 867 fun id x = x
adamc@34 868
adamc@34 869 fun unravelStr (str, _) =
adamc@34 870 case str of
adamc@34 871 StrVar x => (x, [])
adamc@34 872 | StrProj (str, m) =>
adamc@34 873 let
adamc@34 874 val (x, ms) = unravelStr str
adamc@34 875 in
adamc@34 876 (x, ms @ [m])
adamc@34 877 end
adamc@34 878 | _ => raise Fail "unravelStr"
adamc@34 879
adamc@59 880 fun sgnS_con (str, (sgns, strs, cons)) c =
adamc@34 881 case c of
adamc@34 882 CModProj (m1, ms, x) =>
adamc@34 883 (case IM.find (strs, m1) of
adamc@34 884 NONE => c
adamc@34 885 | SOME m1x =>
adamc@34 886 let
adamc@34 887 val (m1, ms') = unravelStr str
adamc@34 888 in
adamc@34 889 CModProj (m1, ms' @ m1x :: ms, x)
adamc@34 890 end)
adamc@34 891 | CNamed n =>
adamc@34 892 (case IM.find (cons, n) of
adamc@34 893 NONE => c
adamc@34 894 | SOME nx =>
adamc@34 895 let
adamc@34 896 val (m1, ms) = unravelStr str
adamc@34 897 in
adamc@34 898 CModProj (m1, ms, nx)
adamc@34 899 end)
adamc@34 900 | _ => c
adamc@34 901
adamc@467 902 fun sgnS_con' (arg as (m1, ms', (sgns, strs, cons))) c =
adamc@216 903 case c of
adamc@216 904 CModProj (m1, ms, x) =>
adamc@216 905 (case IM.find (strs, m1) of
adamc@216 906 NONE => c
adamc@216 907 | SOME m1x => CModProj (m1, ms' @ m1x :: ms, x))
adamc@216 908 | CNamed n =>
adamc@216 909 (case IM.find (cons, n) of
adamc@216 910 NONE => c
adamc@216 911 | SOME nx => CModProj (m1, ms', nx))
adamc@467 912 | CApp (c1, c2) => CApp ((sgnS_con' arg (#1 c1), #2 c1),
adamc@467 913 (sgnS_con' arg (#1 c2), #2 c2))
adamc@216 914 | _ => c
adamc@216 915
adamc@59 916 fun sgnS_sgn (str, (sgns, strs, cons)) sgn =
adamc@59 917 case sgn of
adamc@59 918 SgnProj (m1, ms, x) =>
adamc@59 919 (case IM.find (strs, m1) of
adamc@59 920 NONE => sgn
adamc@59 921 | SOME m1x =>
adamc@59 922 let
adamc@59 923 val (m1, ms') = unravelStr str
adamc@59 924 in
adamc@59 925 SgnProj (m1, ms' @ m1x :: ms, x)
adamc@59 926 end)
adamc@59 927 | SgnVar n =>
adamc@59 928 (case IM.find (sgns, n) of
adamc@59 929 NONE => sgn
adamc@59 930 | SOME nx =>
adamc@59 931 let
adamc@59 932 val (m1, ms) = unravelStr str
adamc@59 933 in
adamc@59 934 SgnProj (m1, ms, nx)
adamc@59 935 end)
adamc@59 936 | _ => sgn
adamc@59 937
adamc@59 938 fun sgnSubSgn x =
adamc@34 939 ElabUtil.Sgn.map {kind = id,
adamc@59 940 con = sgnS_con x,
adamc@34 941 sgn_item = id,
adamc@59 942 sgn = sgnS_sgn x}
adamc@34 943
adamc@211 944
adamc@211 945
adamc@211 946 and projectSgn env {sgn, str, field} =
adamc@211 947 case #1 (hnormSgn env sgn) of
adamc@211 948 SgnConst sgis =>
adamc@211 949 (case sgnSeek (fn SgiSgn (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@211 950 NONE => NONE
adamc@211 951 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@211 952 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@211 953 | _ => NONE
adamc@211 954
adamc@211 955 and hnormSgn env (all as (sgn, loc)) =
adamc@34 956 case sgn of
adamc@42 957 SgnError => all
adamc@42 958 | SgnVar n => hnormSgn env (#2 (lookupSgnNamed env n))
adamc@42 959 | SgnConst _ => all
adamc@42 960 | SgnFun _ => all
adamc@59 961 | SgnProj (m, ms, x) =>
adamc@59 962 let
adamc@59 963 val (_, sgn) = lookupStrNamed env m
adamc@59 964 in
adamc@59 965 case projectSgn env {str = foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms,
adamc@59 966 sgn = sgn,
adamc@59 967 field = x} of
adamc@59 968 NONE => raise Fail "ElabEnv.hnormSgn: projectSgn failed"
adamc@59 969 | SOME sgn => sgn
adamc@59 970 end
adamc@42 971 | SgnWhere (sgn, x, c) =>
adamc@42 972 case #1 (hnormSgn env sgn) of
adamc@42 973 SgnError => (SgnError, loc)
adamc@42 974 | SgnConst sgis =>
adamc@42 975 let
adamc@42 976 fun traverse (pre, post) =
adamc@42 977 case post of
adamc@42 978 [] => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [1]"
adamc@42 979 | (sgi as (SgiConAbs (x', n, k), loc)) :: rest =>
adamc@42 980 if x = x' then
adamc@42 981 List.revAppend (pre, (SgiCon (x', n, k, c), loc) :: rest)
adamc@42 982 else
adamc@42 983 traverse (sgi :: pre, rest)
adamc@42 984 | sgi :: rest => traverse (sgi :: pre, rest)
adamc@42 985
adamc@42 986 val sgis = traverse ([], sgis)
adamc@42 987 in
adamc@42 988 (SgnConst sgis, loc)
adamc@42 989 end
adamc@42 990 | _ => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [2]"
adamc@42 991
adamc@211 992 fun enrichClasses env classes (m1, ms) sgn =
adamc@59 993 case #1 (hnormSgn env sgn) of
adamc@59 994 SgnConst sgis =>
adamc@211 995 let
adamc@218 996 val (classes, _, _, _) =
adamc@218 997 foldl (fn (sgi, (classes, newClasses, fmap, env)) =>
adamc@211 998 let
adamc@211 999 fun found (x, n) =
adamc@211 1000 (CM.insert (classes,
adamc@211 1001 ClProj (m1, ms, x),
adamc@211 1002 empty_class),
adamc@216 1003 IM.insert (newClasses, n, x),
adamc@218 1004 sgiSeek (#1 sgi, fmap),
adamc@218 1005 env)
adamc@216 1006
adamc@218 1007 fun default () = (classes, newClasses, sgiSeek (#1 sgi, fmap), env)
adamc@211 1008 in
adamc@211 1009 case #1 sgi of
adamc@217 1010 SgiStr (x, _, sgn) =>
adamc@217 1011 (enrichClasses env classes (m1, ms @ [x]) sgn,
adamc@217 1012 newClasses,
adamc@218 1013 sgiSeek (#1 sgi, fmap),
adamc@218 1014 env)
adamc@218 1015 | SgiSgn (x, n, sgn) =>
adamc@218 1016 (classes,
adamc@218 1017 newClasses,
adamc@218 1018 fmap,
adamc@218 1019 pushSgnNamedAs env x n sgn)
adamc@218 1020
adamc@563 1021 | SgiClassAbs (x, n, _) => found (x, n)
adamc@563 1022 | SgiClass (x, n, _, _) => found (x, n)
adamc@674 1023 | SgiVal (x, n, c) =>
adamc@674 1024 (case rule_in c of
adamc@674 1025 NONE => default ()
adamc@711 1026 | SOME (cn, nvs, cs, c) =>
adamc@674 1027 let
adamc@711 1028 val loc = #2 c
adamc@711 1029 fun globalize (c, loc) = (sgnS_con' (m1, ms, fmap) c, loc)
adamc@674 1030
adamc@674 1031 val nc =
adamc@674 1032 case cn of
adamc@674 1033 ClNamed f => IM.find (newClasses, f)
adamc@674 1034 | _ => NONE
adamc@674 1035 in
adamc@674 1036 case nc of
adamc@674 1037 NONE =>
adamc@419 1038 let
adamc@419 1039 val classes =
adamc@419 1040 case CM.find (classes, cn) of
adamc@419 1041 NONE => classes
adamc@419 1042 | SOME class =>
adamc@419 1043 let
adamc@711 1044 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1045
adamc@675 1046 val class =
adamc@711 1047 {ground = #ground class,
adamc@711 1048 rules = (nvs,
adamc@711 1049 map globalize cs,
adamc@711 1050 globalize c,
adamc@711 1051 e) :: #rules class}
adamc@419 1052 in
adamc@419 1053 CM.insert (classes, cn, class)
adamc@419 1054 end
adamc@419 1055 in
adamc@419 1056 (classes,
adamc@419 1057 newClasses,
adamc@419 1058 fmap,
adamc@419 1059 env)
adamc@419 1060 end
adamc@674 1061 | SOME fx =>
adamc@674 1062 let
adamc@674 1063 val cn = ClProj (m1, ms, fx)
adamc@419 1064
adamc@674 1065 val classes =
adamc@674 1066 case CM.find (classes, cn) of
adamc@674 1067 NONE => classes
adamc@674 1068 | SOME class =>
adamc@674 1069 let
adamc@675 1070 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1071
adamc@675 1072 val class =
adamc@711 1073 {ground = #ground class,
adamc@711 1074 rules = (nvs,
adamc@711 1075 map globalize cs,
adamc@711 1076 globalize c,
adamc@711 1077 e) :: #rules class}
adamc@674 1078 in
adamc@674 1079 CM.insert (classes, cn, class)
adamc@674 1080 end
adamc@674 1081 in
adamc@674 1082 (classes,
adamc@674 1083 newClasses,
adamc@674 1084 fmap,
adamc@674 1085 env)
adamc@674 1086 end
adamc@674 1087 end)
adamc@216 1088 | _ => default ()
adamc@211 1089 end)
adamc@218 1090 (classes, IM.empty, (IM.empty, IM.empty, IM.empty), env) sgis
adamc@211 1091 in
adamc@211 1092 classes
adamc@211 1093 end
adamc@211 1094 | _ => classes
adamc@211 1095
adamc@211 1096 fun pushStrNamedAs (env : env) x n sgn =
adamc@623 1097 {renameK = #renameK env,
adamc@623 1098 relK = #relK env,
adamc@623 1099
adamc@623 1100 renameC = #renameC env,
adamc@211 1101 relC = #relC env,
adamc@211 1102 namedC = #namedC env,
adamc@211 1103
adamc@211 1104 datatypes = #datatypes env,
adamc@211 1105 constructors = #constructors env,
adamc@211 1106
adamc@211 1107 classes = enrichClasses env (#classes env) (n, []) sgn,
adamc@211 1108
adamc@211 1109 renameE = #renameE env,
adamc@211 1110 relE = #relE env,
adamc@211 1111 namedE = #namedE env,
adamc@211 1112
adamc@211 1113 renameSgn = #renameSgn env,
adamc@211 1114 sgn = #sgn env,
adamc@211 1115
adamc@211 1116 renameStr = SM.insert (#renameStr env, x, (n, sgn)),
adamc@211 1117 str = IM.insert (#str env, n, (x, sgn))}
adamc@211 1118
adamc@211 1119 fun pushStrNamed env x sgn =
adamc@211 1120 let
adamc@211 1121 val n = !namedCounter
adamc@211 1122 in
adamc@211 1123 namedCounter := n + 1;
adamc@211 1124 (pushStrNamedAs env x n sgn, n)
adamc@211 1125 end
adamc@211 1126
adamc@211 1127 fun sgiBinds env (sgi, loc) =
adamc@211 1128 case sgi of
adamc@211 1129 SgiConAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@211 1130 | SgiCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@211 1131 | SgiDatatype (x, n, xs, xncs) =>
adamc@211 1132 let
adamc@341 1133 val k = (KType, loc)
adamc@341 1134 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1135
adamc@341 1136 val env = pushCNamedAs env x n k' NONE
adamc@211 1137 in
adamc@211 1138 foldl (fn ((x', n', to), env) =>
adamc@211 1139 let
adamc@211 1140 val t =
adamc@211 1141 case to of
adamc@211 1142 NONE => (CNamed n, loc)
adamc@211 1143 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@211 1144
adamc@211 1145 val k = (KType, loc)
adamc@211 1146 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@211 1147 in
adamc@211 1148 pushENamedAs env x' n' t
adamc@211 1149 end)
adamc@211 1150 env xncs
adamc@211 1151 end
adamc@211 1152 | SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@211 1153 let
adamc@341 1154 val k = (KType, loc)
adamc@341 1155 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1156
adamc@341 1157 val env = pushCNamedAs env x n k' (SOME (CModProj (m1, ms, x'), loc))
adamc@211 1158 in
adamc@211 1159 foldl (fn ((x', n', to), env) =>
adamc@211 1160 let
adamc@211 1161 val t =
adamc@211 1162 case to of
adamc@211 1163 NONE => (CNamed n, loc)
adamc@211 1164 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@211 1165
adamc@211 1166 val k = (KType, loc)
adamc@211 1167 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@211 1168 in
adamc@211 1169 pushENamedAs env x' n' t
adamc@211 1170 end)
adamc@211 1171 env xncs
adamc@211 1172 end
adamc@211 1173 | SgiVal (x, n, t) => pushENamedAs env x n t
adamc@211 1174 | SgiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@211 1175 | SgiSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@211 1176 | SgiConstraint _ => env
adamc@211 1177
adamc@711 1178 | SgiClassAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@711 1179 | SgiClass (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@459 1180
adamc@211 1181 fun sgnSubCon x =
adamc@211 1182 ElabUtil.Con.map {kind = id,
adamc@211 1183 con = sgnS_con x}
adamc@59 1184
adamc@59 1185 fun projectStr env {sgn, str, field} =
adamc@59 1186 case #1 (hnormSgn env sgn) of
adamc@59 1187 SgnConst sgis =>
adamc@59 1188 (case sgnSeek (fn SgiStr (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@59 1189 NONE => NONE
adamc@59 1190 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@59 1191 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@59 1192 | _ => NONE
adamc@59 1193
adamc@158 1194 fun chaseMpath env (n, ms) =
adamc@158 1195 let
adamc@158 1196 val (_, sgn) = lookupStrNamed env n
adamc@158 1197 in
adamc@158 1198 foldl (fn (m, (str, sgn)) =>
adamc@158 1199 case projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1200 NONE => raise Fail "kindof: Unknown substructure"
adamc@158 1201 | SOME sgn => ((StrProj (str, m), #2 sgn), sgn))
adamc@158 1202 ((StrVar n, #2 sgn), sgn) ms
adamc@158 1203 end
adamc@158 1204
adamc@42 1205 fun projectCon env {sgn, str, field} =
adamc@42 1206 case #1 (hnormSgn env sgn) of
adamc@34 1207 SgnConst sgis =>
adamc@34 1208 (case sgnSeek (fn SgiConAbs (x, _, k) => if x = field then SOME (k, NONE) else NONE
adamc@34 1209 | SgiCon (x, _, k, c) => if x = field then SOME (k, SOME c) else NONE
adamc@341 1210 | SgiDatatype (x, _, xs, _) =>
adamc@158 1211 if x = field then
adamc@341 1212 let
adamc@341 1213 val k = (KType, #2 sgn)
adamc@341 1214 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@341 1215 in
adamc@341 1216 SOME (k', NONE)
adamc@341 1217 end
adamc@341 1218 else
adamc@341 1219 NONE
adamc@341 1220 | SgiDatatypeImp (x, _, m1, ms, x', xs, _) =>
adamc@341 1221 if x = field then
adamc@341 1222 let
adamc@341 1223 val k = (KType, #2 sgn)
adamc@341 1224 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@341 1225 in
adamc@341 1226 SOME (k', SOME (CModProj (m1, ms, x'), #2 sgn))
adamc@341 1227 end
adamc@158 1228 else
adamc@158 1229 NONE
adamc@563 1230 | SgiClassAbs (x, _, k) => if x = field then
adamc@563 1231 SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), NONE)
adamc@563 1232 else
adamc@563 1233 NONE
adamc@563 1234 | SgiClass (x, _, k, c) => if x = field then
adamc@563 1235 SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), SOME c)
adamc@563 1236 else
adamc@563 1237 NONE
adamc@34 1238 | _ => NONE) sgis of
adamc@34 1239 NONE => NONE
adamc@34 1240 | SOME ((k, co), subs) => SOME (k, Option.map (sgnSubCon (str, subs)) co))
adamc@34 1241 | SgnError => SOME ((KError, ErrorMsg.dummySpan), SOME (CError, ErrorMsg.dummySpan))
adamc@42 1242 | _ => NONE
adamc@34 1243
adamc@157 1244 fun projectDatatype env {sgn, str, field} =
adamc@157 1245 case #1 (hnormSgn env sgn) of
adamc@157 1246 SgnConst sgis =>
adamc@191 1247 (case sgnSeek (fn SgiDatatype (x, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
adamc@191 1248 | SgiDatatypeImp (x, _, _, _, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
adamc@157 1249 | _ => NONE) sgis of
adamc@157 1250 NONE => NONE
adamc@191 1251 | SOME ((xs, xncs), subs) => SOME (xs,
adamc@191 1252 map (fn (x, n, to) => (x, n, Option.map (sgnSubCon (str, subs)) to)) xncs))
adamc@157 1253 | _ => NONE
adamc@157 1254
adamc@174 1255 fun projectConstructor env {sgn, str, field} =
adamc@174 1256 case #1 (hnormSgn env sgn) of
adamc@174 1257 SgnConst sgis =>
adamc@174 1258 let
adamc@191 1259 fun consider (n, xs, xncs) =
adamc@174 1260 ListUtil.search (fn (x, n', to) =>
adamc@174 1261 if x <> field then
adamc@174 1262 NONE
adamc@174 1263 else
adamc@191 1264 SOME (U.classifyDatatype xncs, n', xs, to, (CNamed n, #2 str))) xncs
adamc@174 1265 in
adamc@191 1266 case sgnSeek (fn SgiDatatype (_, n, xs, xncs) => consider (n, xs, xncs)
adamc@191 1267 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => consider (n, xs, xncs)
adamc@174 1268 | _ => NONE) sgis of
adamc@174 1269 NONE => NONE
adamc@191 1270 | SOME ((dk, n, xs, to, t), subs) => SOME (dk, n, xs, Option.map (sgnSubCon (str, subs)) to,
adamc@191 1271 sgnSubCon (str, subs) t)
adamc@174 1272 end
adamc@174 1273 | _ => NONE
adamc@174 1274
adamc@42 1275 fun projectVal env {sgn, str, field} =
adamc@42 1276 case #1 (hnormSgn env sgn) of
adamc@34 1277 SgnConst sgis =>
adamc@162 1278 let
adamc@191 1279 fun seek (n, xs, xncs) =
adamc@162 1280 ListUtil.search (fn (x, _, to) =>
adamc@162 1281 if x = field then
adamc@191 1282 SOME (let
adamc@467 1283 val base = (CNamed n, #2 sgn)
adamc@467 1284 val nxs = length xs
adamc@467 1285 val base = ListUtil.foldli (fn (i, _, base) =>
adamc@467 1286 (CApp (base,
adamc@467 1287 (CRel (nxs - i - 1), #2 sgn)),
adamc@467 1288 #2 sgn))
adamc@467 1289 base xs
adamc@467 1290
adamc@191 1291 val t =
adamc@191 1292 case to of
adamc@467 1293 NONE => base
adamc@467 1294 | SOME t => (TFun (t, base), #2 sgn)
adamc@191 1295 val k = (KType, #2 sgn)
adamc@191 1296 in
adamc@467 1297 foldr (fn (x, t) => (TCFun (Implicit, x, k, t), #2 sgn))
adamc@191 1298 t xs
adamc@191 1299 end)
adamc@162 1300 else
adamc@162 1301 NONE) xncs
adamc@162 1302 in
adamc@162 1303 case sgnSeek (fn SgiVal (x, _, c) => if x = field then SOME c else NONE
adamc@191 1304 | SgiDatatype (_, n, xs, xncs) => seek (n, xs, xncs)
adamc@191 1305 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => seek (n, xs, xncs)
adamc@162 1306 | _ => NONE) sgis of
adamc@162 1307 NONE => NONE
adamc@162 1308 | SOME (c, subs) => SOME (sgnSubCon (str, subs) c)
adamc@162 1309 end
adamc@34 1310 | SgnError => SOME (CError, ErrorMsg.dummySpan)
adamc@42 1311 | _ => NONE
adamc@34 1312
adamc@88 1313 fun sgnSeekConstraints (str, sgis) =
adamc@88 1314 let
adamc@88 1315 fun seek (sgis, sgns, strs, cons, acc) =
adamc@88 1316 case sgis of
adamc@88 1317 [] => acc
adamc@88 1318 | (sgi, _) :: sgis =>
adamc@88 1319 case sgi of
adamc@88 1320 SgiConstraint (c1, c2) =>
adamc@88 1321 let
adamc@88 1322 val sub = sgnSubCon (str, (sgns, strs, cons))
adamc@88 1323 in
adamc@88 1324 seek (sgis, sgns, strs, cons, (sub c1, sub c2) :: acc)
adamc@88 1325 end
adamc@88 1326 | SgiConAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1327 | SgiCon (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@191 1328 | SgiDatatype (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@191 1329 | SgiDatatypeImp (x, n, _, _, _, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1330 | SgiVal _ => seek (sgis, sgns, strs, cons, acc)
adamc@88 1331 | SgiSgn (x, n, _) => seek (sgis, IM.insert (sgns, n, x), strs, cons, acc)
adamc@88 1332 | SgiStr (x, n, _) => seek (sgis, sgns, IM.insert (strs, n, x), cons, acc)
adamc@563 1333 | SgiClassAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@563 1334 | SgiClass (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1335 in
adamc@88 1336 seek (sgis, IM.empty, IM.empty, IM.empty, [])
adamc@88 1337 end
adamc@88 1338
adamc@88 1339 fun projectConstraints env {sgn, str} =
adamc@88 1340 case #1 (hnormSgn env sgn) of
adamc@88 1341 SgnConst sgis => SOME (sgnSeekConstraints (str, sgis))
adamc@88 1342 | SgnError => SOME []
adamc@88 1343 | _ => NONE
adamc@34 1344
adamc@447 1345 fun edeclBinds env (d, loc) =
adamc@447 1346 case d of
adamc@447 1347 EDVal (x, t, _) => pushERel env x t
adamc@447 1348 | EDValRec vis => foldl (fn ((x, t, _), env) => pushERel env x t) env vis
adamc@447 1349
adamc@157 1350 fun declBinds env (d, loc) =
adamc@157 1351 case d of
adamc@157 1352 DCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@191 1353 | DDatatype (x, n, xs, xncs) =>
adamc@157 1354 let
adamc@297 1355 val k = (KType, loc)
adamc@297 1356 val nxs = length xs
adamc@297 1357 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@297 1358 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@297 1359 (KArrow (k, kb), loc)))
adamc@297 1360 ((CNamed n, loc), k) xs
adamc@297 1361
adamc@297 1362 val env = pushCNamedAs env x n kb NONE
adamc@191 1363 val env = pushDatatype env n xs xncs
adamc@157 1364 in
adamc@191 1365 foldl (fn ((x', n', to), env) =>
adamc@191 1366 let
adamc@191 1367 val t =
adamc@191 1368 case to of
adamc@297 1369 NONE => tb
adamc@297 1370 | SOME t => (TFun (t, tb), loc)
adamc@297 1371 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@191 1372 in
adamc@191 1373 pushENamedAs env x' n' t
adamc@191 1374 end)
adamc@191 1375 env xncs
adamc@157 1376 end
adamc@191 1377 | DDatatypeImp (x, n, m, ms, x', xs, xncs) =>
adamc@157 1378 let
adamc@157 1379 val t = (CModProj (m, ms, x'), loc)
adamc@297 1380 val k = (KType, loc)
adamc@297 1381 val nxs = length xs
adamc@297 1382 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@297 1383 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@297 1384 (KArrow (k, kb), loc)))
adamc@297 1385 ((CNamed n, loc), k) xs
adamc@297 1386
adamc@341 1387 val env = pushCNamedAs env x n kb (SOME t)
adamc@191 1388 val env = pushDatatype env n xs xncs
adamc@157 1389 in
adamc@191 1390 foldl (fn ((x', n', to), env) =>
adamc@191 1391 let
adamc@191 1392 val t =
adamc@191 1393 case to of
adamc@297 1394 NONE => tb
adamc@297 1395 | SOME t => (TFun (t, tb), loc)
adamc@297 1396 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@191 1397 in
adamc@191 1398 pushENamedAs env x' n' t
adamc@191 1399 end)
adamc@191 1400 env xncs
adamc@157 1401 end
adamc@157 1402 | DVal (x, n, t, _) => pushENamedAs env x n t
adamc@157 1403 | DValRec vis => foldl (fn ((x, n, t, _), env) => pushENamedAs env x n t) env vis
adamc@157 1404 | DSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@157 1405 | DStr (x, n, sgn, _) => pushStrNamedAs env x n sgn
adamc@157 1406 | DFfiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@157 1407 | DConstraint _ => env
adamc@157 1408 | DExport _ => env
adamc@707 1409 | DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@205 1410 let
adamc@705 1411 val ct = (CModProj (tn, [], "sql_table"), loc)
adamc@705 1412 val ct = (CApp (ct, c), loc)
adamc@707 1413 val ct = (CApp (ct, (CConcat (pc, cc), loc)), loc)
adamc@338 1414 in
adamc@705 1415 pushENamedAs env x n ct
adamc@338 1416 end
adamc@338 1417 | DSequence (tn, x, n) =>
adamc@338 1418 let
adamc@338 1419 val t = (CModProj (tn, [], "sql_sequence"), loc)
adamc@205 1420 in
adamc@205 1421 pushENamedAs env x n t
adamc@205 1422 end
adamc@563 1423 | DClass (x, n, k, c) =>
adamc@213 1424 let
adamc@563 1425 val k = (KArrow (k, (KType, loc)), loc)
adamc@213 1426 val env = pushCNamedAs env x n k (SOME c)
adamc@213 1427 in
adamc@213 1428 pushClass env n
adamc@213 1429 end
adamc@271 1430 | DDatabase _ => env
adamc@459 1431 | DCookie (tn, x, n, c) =>
adamc@459 1432 let
adamc@459 1433 val t = (CApp ((CModProj (tn, [], "cookie"), loc), c), loc)
adamc@459 1434 in
adamc@459 1435 pushENamedAs env x n t
adamc@459 1436 end
adamc@157 1437
adamc@243 1438 fun patBinds env (p, loc) =
adamc@243 1439 case p of
adamc@243 1440 PWild => env
adamc@243 1441 | PVar (x, t) => pushERel env x t
adamc@243 1442 | PPrim _ => env
adamc@243 1443 | PCon (_, _, _, NONE) => env
adamc@243 1444 | PCon (_, _, _, SOME p) => patBinds env p
adamc@243 1445 | PRecord xps => foldl (fn ((_, p, _), env) => patBinds env p) env xps
adamc@243 1446
adamc@2 1447 end