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annotate src/elab_env.sml @ 1639:6c00d8af6239

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Add a new scoping check for unification variables, to fix a type inference bug
author Adam Chlipala <adam@chlipala.net>
date Sun, 18 Dec 2011 11:29:13 -0500
parents 287604b4a08d
children fca4a6d05ac1
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@623 46 val liftKindInKind =
adamc@623 47 U.Kind.mapB {kind = fn bound => fn k =>
adamc@623 48 case k of
adamc@623 49 KRel xn =>
adamc@623 50 if xn < bound then
adamc@623 51 k
adamc@623 52 else
adamc@623 53 KRel (xn + 1)
adamc@623 54 | _ => k,
adamc@623 55 bind = fn (bound, _) => bound + 1}
adamc@623 56
adamc@623 57 val liftKindInCon =
adamc@623 58 U.Con.mapB {kind = fn bound => fn k =>
adamc@623 59 case k of
adamc@623 60 KRel xn =>
adamc@623 61 if xn < bound then
adamc@623 62 k
adamc@623 63 else
adamc@623 64 KRel (xn + 1)
adamc@623 65 | _ => k,
adamc@623 66 con = fn _ => fn c => c,
adamc@623 67 bind = fn (bound, U.Con.RelK _) => bound + 1
adamc@623 68 | (bound, _) => bound}
adamc@623 69
adamc@13 70 val liftConInCon =
adamc@623 71 U.Con.mapB {kind = fn _ => fn k => k,
adamc@13 72 con = fn bound => fn c =>
adamc@13 73 case c of
adamc@16 74 CRel xn =>
adamc@13 75 if xn < bound then
adamc@13 76 c
adamc@13 77 else
adamc@16 78 CRel (xn + 1)
adam@1303 79 | CUnif (nl, loc, k, s, r) => CUnif (nl+1, loc, k, s, r)
adamc@13 80 | _ => c,
adamc@623 81 bind = fn (bound, U.Con.RelC _) => bound + 1
adamc@13 82 | (bound, _) => bound}
adamc@13 83
adamc@13 84 val lift = liftConInCon 0
adamc@13 85
adam@1303 86 fun mliftConInCon by c =
adam@1303 87 if by = 0 then
adam@1303 88 c
adam@1303 89 else
adam@1303 90 U.Con.mapB {kind = fn _ => fn k => k,
adam@1303 91 con = fn bound => fn c =>
adam@1303 92 case c of
adam@1303 93 CRel xn =>
adam@1303 94 if xn < bound then
adam@1303 95 c
adam@1303 96 else
adam@1303 97 CRel (xn + by)
adam@1303 98 | CUnif (nl, loc, k, s, r) => CUnif (nl+by, loc, k, s, r)
adam@1303 99 | _ => c,
adam@1303 100 bind = fn (bound, U.Con.RelC _) => bound + 1
adam@1303 101 | (bound, _) => bound} 0 c
adam@1303 102
adam@1303 103 val () = U.mliftConInCon := mliftConInCon
adam@1303 104
adamc@623 105 val liftKindInExp =
adamc@623 106 U.Exp.mapB {kind = fn bound => fn k =>
adamc@623 107 case k of
adamc@623 108 KRel xn =>
adamc@623 109 if xn < bound then
adamc@623 110 k
adamc@623 111 else
adamc@623 112 KRel (xn + 1)
adamc@623 113 | _ => k,
adamc@623 114 con = fn _ => fn c => c,
adamc@623 115 exp = fn _ => fn e => e,
adamc@623 116 bind = fn (bound, U.Exp.RelK _) => bound + 1
adamc@623 117 | (bound, _) => bound}
adamc@623 118
adamc@448 119 val liftConInExp =
adamc@623 120 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@448 121 con = fn bound => fn c =>
adamc@448 122 case c of
adamc@448 123 CRel xn =>
adamc@448 124 if xn < bound then
adamc@448 125 c
adamc@448 126 else
adamc@448 127 CRel (xn + 1)
adam@1303 128 | CUnif (nl, loc, k, s, r) => CUnif (nl+1, loc, k, s, r)
adamc@448 129 | _ => c,
adamc@448 130 exp = fn _ => fn e => e,
adamc@448 131 bind = fn (bound, U.Exp.RelC _) => bound + 1
adamc@448 132 | (bound, _) => bound}
adamc@448 133
adamc@211 134 val liftExpInExp =
adamc@623 135 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@211 136 con = fn _ => fn c => c,
adamc@211 137 exp = fn bound => fn e =>
adamc@211 138 case e of
adamc@211 139 ERel xn =>
adamc@211 140 if xn < bound then
adamc@211 141 e
adamc@211 142 else
adamc@211 143 ERel (xn + 1)
adamc@211 144 | _ => e,
adamc@211 145 bind = fn (bound, U.Exp.RelE _) => bound + 1
adamc@211 146 | (bound, _) => bound}
adamc@211 147
adamc@211 148
adamc@211 149 val liftExp = liftExpInExp 0
adamc@13 150
adamc@448 151 val subExpInExp =
adamc@623 152 U.Exp.mapB {kind = fn _ => fn k => k,
adamc@448 153 con = fn _ => fn c => c,
adamc@448 154 exp = fn (xn, rep) => fn e =>
adamc@448 155 case e of
adamc@448 156 ERel xn' =>
adamc@448 157 (case Int.compare (xn', xn) of
adamc@448 158 EQUAL => #1 rep
adamc@448 159 | GREATER=> ERel (xn' - 1)
adamc@448 160 | LESS => e)
adamc@448 161 | _ => e,
adamc@448 162 bind = fn ((xn, rep), U.Exp.RelE _) => (xn+1, liftExpInExp 0 rep)
adamc@448 163 | ((xn, rep), U.Exp.RelC _) => (xn, liftConInExp 0 rep)
adamc@448 164 | (ctx, _) => ctx}
adamc@448 165
adamc@13 166 (* Back to environments *)
adamc@13 167
adamc@9 168 datatype 'a var' =
adamc@9 169 Rel' of int * 'a
adamc@9 170 | Named' of int * 'a
adamc@2 171
adamc@9 172 datatype 'a var =
adamc@9 173 NotBound
adamc@9 174 | Rel of int * 'a
adamc@9 175 | Named of int * 'a
adamc@2 176
adamc@191 177 type datatyp = string list * (string * con option) IM.map
adamc@157 178
adamc@211 179 datatype class_name =
adamc@211 180 ClNamed of int
adamc@211 181 | ClProj of int * string list * string
adamc@211 182
adamc@711 183 fun class_name_out cn =
adamc@711 184 case cn of
adamc@711 185 ClNamed n => (CNamed n, ErrorMsg.dummySpan)
adamc@711 186 | ClProj x => (CModProj x, ErrorMsg.dummySpan)
adamc@711 187
adamc@216 188 fun cn2s cn =
adamc@216 189 case cn of
adamc@216 190 ClNamed n => "Named(" ^ Int.toString n ^ ")"
adamc@216 191 | ClProj (m, ms, x) => "Proj(" ^ Int.toString m ^ "," ^ String.concatWith "," ms ^ "," ^ x ^ ")"
adamc@216 192
adamc@211 193 structure CK = struct
adamc@211 194 type ord_key = class_name
adamc@211 195 open Order
adamc@211 196 fun compare x =
adamc@211 197 case x of
adamc@211 198 (ClNamed n1, ClNamed n2) => Int.compare (n1, n2)
adamc@211 199 | (ClNamed _, _) => LESS
adamc@211 200 | (_, ClNamed _) => GREATER
adamc@211 201
adamc@211 202 | (ClProj (m1, ms1, x1), ClProj (m2, ms2, x2)) =>
adamc@211 203 join (Int.compare (m1, m2),
adamc@211 204 fn () => join (joinL String.compare (ms1, ms2),
adamc@211 205 fn () => String.compare (x1, x2)))
adamc@211 206 end
adamc@211 207
adamc@677 208 structure CS = BinarySetFn(CK)
adamc@211 209 structure CM = BinaryMapFn(CK)
adamc@211 210
adamc@711 211 type class = {ground : (con * exp) list,
adamc@711 212 rules : (int * con list * con * exp) list}
adamc@711 213 val empty_class = {ground = [],
adamc@711 214 rules = []}
adamc@216 215
adamc@2 216 type env = {
adamc@623 217 renameK : int SM.map,
adamc@623 218 relK : string list,
adamc@623 219
adamc@9 220 renameC : kind var' SM.map,
adamc@2 221 relC : (string * kind) list,
adamc@11 222 namedC : (string * kind * con option) IM.map,
adamc@9 223
adamc@157 224 datatypes : datatyp IM.map,
adamc@191 225 constructors : (datatype_kind * int * string list * con option * int) SM.map,
adamc@157 226
adamc@211 227 classes : class CM.map,
adamc@211 228
adamc@9 229 renameE : con var' SM.map,
adamc@9 230 relE : (string * con) list,
adamc@31 231 namedE : (string * con) IM.map,
adamc@31 232
adamc@31 233 renameSgn : (int * sgn) SM.map,
adamc@31 234 sgn : (string * sgn) IM.map,
adamc@31 235
adamc@31 236 renameStr : (int * sgn) SM.map,
adamc@31 237 str : (string * sgn) IM.map
adamc@2 238 }
adamc@2 239
adamc@2 240 val namedCounter = ref 0
adamc@2 241
adamc@109 242 fun newNamed () =
adamc@109 243 let
adamc@109 244 val r = !namedCounter
adamc@109 245 in
adamc@109 246 namedCounter := r + 1;
adamc@109 247 r
adamc@109 248 end
adamc@109 249
adamc@2 250 val empty = {
adamc@623 251 renameK = SM.empty,
adamc@623 252 relK = [],
adamc@623 253
adamc@2 254 renameC = SM.empty,
adamc@2 255 relC = [],
adamc@9 256 namedC = IM.empty,
adamc@9 257
adamc@157 258 datatypes = IM.empty,
adamc@171 259 constructors = SM.empty,
adamc@157 260
adamc@211 261 classes = CM.empty,
adamc@211 262
adamc@9 263 renameE = SM.empty,
adamc@9 264 relE = [],
adamc@31 265 namedE = IM.empty,
adamc@31 266
adamc@31 267 renameSgn = SM.empty,
adamc@31 268 sgn = IM.empty,
adamc@31 269
adamc@31 270 renameStr = SM.empty,
adamc@31 271 str = IM.empty
adamc@2 272 }
adamc@2 273
adamc@623 274 fun pushKRel (env : env) x =
adamc@623 275 let
adamc@623 276 val renameK = SM.map (fn n => n+1) (#renameK env)
adamc@623 277 in
adamc@623 278 {renameK = SM.insert (renameK, x, 0),
adamc@623 279 relK = x :: #relK env,
adamc@623 280
adamc@623 281 renameC = SM.map (fn Rel' (n, k) => Rel' (n, liftKindInKind 0 k)
adamc@623 282 | x => x) (#renameC env),
adamc@623 283 relC = map (fn (x, k) => (x, liftKindInKind 0 k)) (#relC env),
adamc@623 284 namedC = #namedC env,
adamc@623 285
adamc@623 286 datatypes = #datatypes env,
adamc@623 287 constructors = #constructors env,
adamc@623 288
adamc@711 289 classes = CM.map (fn cl => {ground = map (fn (c, e) =>
adamc@711 290 (liftKindInCon 0 c,
adamc@711 291 e))
adamc@711 292 (#ground cl),
adamc@711 293 rules = #rules cl})
adamc@711 294 (#classes env),
adamc@623 295
adamc@623 296 renameE = SM.map (fn Rel' (n, c) => Rel' (n, liftKindInCon 0 c)
adamc@623 297 | Named' (n, c) => Named' (n, c)) (#renameE env),
adamc@623 298 relE = map (fn (x, c) => (x, liftKindInCon 0 c)) (#relE env),
adamc@623 299 namedE = #namedE env,
adamc@623 300
adamc@623 301 renameSgn = #renameSgn env,
adamc@623 302 sgn = #sgn env,
adamc@623 303
adamc@623 304 renameStr = #renameStr env,
adamc@623 305 str = #str env
adamc@623 306 }
adamc@623 307 end
adamc@623 308
adamc@623 309 fun lookupKRel (env : env) n =
adamc@623 310 (List.nth (#relK env, n))
adamc@623 311 handle Subscript => raise UnboundRel n
adamc@623 312
adamc@623 313 fun lookupK (env : env) x = SM.find (#renameK env, x)
adamc@623 314
adamc@2 315 fun pushCRel (env : env) x k =
adamc@2 316 let
adamc@9 317 val renameC = SM.map (fn Rel' (n, k) => Rel' (n+1, k)
adamc@2 318 | x => x) (#renameC env)
adamc@2 319 in
adamc@623 320 {renameK = #renameK env,
adamc@623 321 relK = #relK env,
adamc@623 322
adamc@623 323 renameC = SM.insert (renameC, x, Rel' (0, k)),
adamc@2 324 relC = (x, k) :: #relC env,
adamc@514 325 namedC = #namedC env,
adamc@9 326
adamc@157 327 datatypes = #datatypes env,
adamc@171 328 constructors = #constructors env,
adamc@157 329
adamc@674 330 classes = CM.map (fn class =>
adamc@711 331 {ground = map (fn (c, e) =>
adamc@711 332 (liftConInCon 0 c,
adamc@711 333 e))
adamc@711 334 (#ground class),
adamc@711 335 rules = #rules class})
adamc@211 336 (#classes env),
adamc@211 337
adamc@328 338 renameE = SM.map (fn Rel' (n, c) => Rel' (n, lift c)
adamc@517 339 | Named' (n, c) => Named' (n, c)) (#renameE env),
adamc@13 340 relE = map (fn (x, c) => (x, lift c)) (#relE env),
adamc@514 341 namedE = #namedE env,
adamc@31 342
adamc@31 343 renameSgn = #renameSgn env,
adamc@31 344 sgn = #sgn env,
adamc@31 345
adamc@31 346 renameStr = #renameStr env,
adamc@31 347 str = #str env
adamc@31 348 }
adamc@2 349 end
adamc@2 350
adamc@2 351 fun lookupCRel (env : env) n =
adamc@2 352 (List.nth (#relC env, n))
adamc@2 353 handle Subscript => raise UnboundRel n
adamc@2 354
adamc@11 355 fun pushCNamedAs (env : env) x n k co =
adamc@623 356 {renameK = #renameK env,
adamc@623 357 relK = #relK env,
adamc@623 358
adamc@623 359 renameC = SM.insert (#renameC env, x, Named' (n, k)),
adamc@5 360 relC = #relC env,
adamc@11 361 namedC = IM.insert (#namedC env, n, (x, k, co)),
adamc@9 362
adamc@157 363 datatypes = #datatypes env,
adamc@171 364 constructors = #constructors env,
adamc@157 365
adamc@211 366 classes = #classes env,
adamc@211 367
adamc@9 368 renameE = #renameE env,
adamc@9 369 relE = #relE env,
adamc@31 370 namedE = #namedE env,
adamc@31 371
adamc@31 372 renameSgn = #renameSgn env,
adamc@31 373 sgn = #sgn env,
adamc@31 374
adamc@31 375 renameStr = #renameStr env,
adamc@31 376 str = #str env}
adamc@5 377
adamc@11 378 fun pushCNamed env x k co =
adamc@2 379 let
adamc@2 380 val n = !namedCounter
adamc@2 381 in
adamc@2 382 namedCounter := n + 1;
adamc@11 383 (pushCNamedAs env x n k co, n)
adamc@2 384 end
adamc@2 385
adamc@2 386 fun lookupCNamed (env : env) n =
adamc@2 387 case IM.find (#namedC env, n) of
adamc@2 388 NONE => raise UnboundNamed n
adamc@2 389 | SOME x => x
adamc@2 390
adamc@2 391 fun lookupC (env : env) x =
adamc@2 392 case SM.find (#renameC env, x) of
adamc@9 393 NONE => NotBound
adamc@9 394 | SOME (Rel' x) => Rel x
adamc@9 395 | SOME (Named' x) => Named x
adamc@9 396
adamc@191 397 fun pushDatatype (env : env) n xs xncs =
adamc@188 398 let
adamc@188 399 val dk = U.classifyDatatype xncs
adamc@188 400 in
adamc@623 401 {renameK = #renameK env,
adamc@623 402 relK = #relK env,
adamc@623 403
adamc@623 404 renameC = #renameC env,
adamc@188 405 relC = #relC env,
adamc@188 406 namedC = #namedC env,
adamc@157 407
adamc@188 408 datatypes = IM.insert (#datatypes env, n,
adamc@191 409 (xs, foldl (fn ((x, n, to), cons) =>
adamc@191 410 IM.insert (cons, n, (x, to))) IM.empty xncs)),
adamc@188 411 constructors = foldl (fn ((x, n', to), cmap) =>
adamc@191 412 SM.insert (cmap, x, (dk, n', xs, to, n)))
adamc@188 413 (#constructors env) xncs,
adamc@157 414
adamc@211 415 classes = #classes env,
adamc@211 416
adamc@188 417 renameE = #renameE env,
adamc@188 418 relE = #relE env,
adamc@188 419 namedE = #namedE env,
adamc@157 420
adamc@188 421 renameSgn = #renameSgn env,
adamc@188 422 sgn = #sgn env,
adamc@157 423
adamc@188 424 renameStr = #renameStr env,
adamc@188 425 str = #str env}
adamc@188 426 end
adamc@157 427
adamc@157 428 fun lookupDatatype (env : env) n =
adamc@157 429 case IM.find (#datatypes env, n) of
adamc@157 430 NONE => raise UnboundNamed n
adamc@157 431 | SOME x => x
adamc@157 432
adamc@191 433 fun lookupDatatypeConstructor (_, dt) n =
adamc@157 434 case IM.find (dt, n) of
adamc@157 435 NONE => raise UnboundNamed n
adamc@157 436 | SOME x => x
adamc@157 437
adamc@171 438 fun lookupConstructor (env : env) s = SM.find (#constructors env, s)
adamc@171 439
adamc@191 440 fun datatypeArgs (xs, _) = xs
adamc@191 441 fun constructors (_, dt) = IM.foldri (fn (n, (x, to), ls) => (x, n, to) :: ls) [] dt
adamc@157 442
adamc@711 443 fun listClasses (env : env) =
adamc@711 444 map (fn (cn, {ground, rules}) =>
adamc@711 445 (class_name_out cn,
adamc@711 446 ground
adamc@711 447 @ map (fn (nvs, cs, c, e) =>
adamc@711 448 let
adamc@711 449 val loc = #2 c
adamc@711 450 val c = foldr (fn (c', c) => (TFun (c', c), loc)) c cs
adamc@711 451 val c = ListUtil.foldli (fn (n, (), c) => (TCFun (Explicit,
adamc@711 452 "x" ^ Int.toString n,
adamc@711 453 (KError, loc),
adamc@711 454 c), loc))
adamc@711 455 c (List.tabulate (nvs, fn _ => ()))
adamc@711 456 in
adamc@711 457 (c, e)
adamc@711 458 end) rules)) (CM.listItemsi (#classes env))
adamc@711 459
adamc@211 460 fun pushClass (env : env) n =
adamc@623 461 {renameK = #renameK env,
adamc@623 462 relK = #relK env,
adamc@623 463
adamc@623 464 renameC = #renameC env,
adamc@211 465 relC = #relC env,
adamc@211 466 namedC = #namedC env,
adamc@211 467
adamc@211 468 datatypes = #datatypes env,
adamc@211 469 constructors = #constructors env,
adamc@211 470
adamc@675 471 classes = CM.insert (#classes env, ClNamed n, empty_class),
adamc@211 472
adamc@211 473 renameE = #renameE env,
adamc@211 474 relE = #relE env,
adamc@211 475 namedE = #namedE env,
adamc@211 476
adamc@211 477 renameSgn = #renameSgn env,
adamc@211 478 sgn = #sgn env,
adamc@211 479
adamc@211 480 renameStr = #renameStr env,
adamc@403 481 str = #str env}
adamc@211 482
adamc@211 483 fun class_name_in (c, _) =
adamc@211 484 case c of
adamc@211 485 CNamed n => SOME (ClNamed n)
adamc@211 486 | CModProj x => SOME (ClProj x)
adam@1639 487 | CUnif (_, _, _, _, ref (Known c)) => class_name_in c
adamc@211 488 | _ => NONE
adamc@211 489
adamc@403 490 fun isClass (env : env) c =
adamc@403 491 let
adamc@403 492 fun find NONE = false
adamc@403 493 | find (SOME c) = Option.isSome (CM.find (#classes env, c))
adamc@403 494 in
adamc@403 495 find (class_name_in c)
adamc@403 496 end
adamc@403 497
adamc@711 498 fun class_head_in c =
adamc@711 499 case #1 c of
adamc@711 500 CApp (f, _) => class_head_in f
adam@1639 501 | CUnif (_, _, _, _, ref (Known c)) => class_head_in c
adamc@711 502 | _ => class_name_in c
adamc@211 503
adamc@711 504 exception Unify
adamc@711 505
adamc@711 506 fun unifyKinds (k1, k2) =
adamc@711 507 case (#1 k1, #1 k2) of
adamc@711 508 (KType, KType) => ()
adamc@711 509 | (KArrow (d1, r1), KArrow (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@711 510 | (KName, KName) => ()
adamc@711 511 | (KRecord k1, KRecord k2) => unifyKinds (k1, k2)
adamc@711 512 | (KUnit, KUnit) => ()
adamc@711 513 | (KTuple ks1, KTuple ks2) => (ListPair.appEq unifyKinds (ks1, ks2)
adamc@711 514 handle ListPair.UnequalLengths => raise Unify)
adam@1639 515 | (KUnif (_, _, ref (KKnown k1)), _) => unifyKinds (k1, k2)
adam@1639 516 | (_, KUnif (_, _, ref (KKnown k2))) => unifyKinds (k1, k2)
adamc@711 517 | (KRel n1, KRel n2) => if n1 = n2 then () else raise Unify
adamc@711 518 | (KFun (_, k1), KFun (_, k2)) => unifyKinds (k1, k2)
adamc@711 519 | _ => raise Unify
adamc@711 520
adamc@904 521 fun eqCons (c1, c2) =
adamc@904 522 case (#1 c1, #1 c2) of
adam@1639 523 (CUnif (nl, _, _, _, ref (Known c1)), _) => eqCons (mliftConInCon nl c1, c2)
adam@1639 524 | (_, CUnif (nl, _, _, _, ref (Known c2))) => eqCons (c1, mliftConInCon nl c2)
adamc@904 525
adamc@904 526 | (CRel n1, CRel n2) => if n1 = n2 then () else raise Unify
adamc@904 527
adamc@904 528 | (TFun (d1, r1), TFun (d2, r2)) => (eqCons (d1, d2); eqCons (r1, r2))
adamc@904 529 | (TCFun (_, _, k1, r1), TCFun (_, _, k2, r2)) => (unifyKinds (k1, k2); eqCons (r1, r2))
adamc@904 530 | (TRecord c1, TRecord c2) => eqCons (c1, c2)
adamc@904 531 | (TDisjoint (a1, b1, c1), TDisjoint (a2, b2, c2)) =>
adamc@904 532 (eqCons (a1, a2); eqCons (b1, b2); eqCons (c1, c2))
adamc@904 533
adamc@904 534 | (CNamed n1, CNamed n2) => if n1 = n2 then () else raise Unify
adamc@904 535 | (CModProj (n1, ms1, x1), CModProj (n2, ms2, x2)) =>
adamc@904 536 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then () else raise Unify
adamc@904 537 | (CApp (f1, x1), CApp (f2, x2)) => (eqCons (f1, f2); eqCons (x1, x2))
adamc@904 538 | (CAbs (_, k1, b1), CAbs (_, k2, b2)) => (unifyKinds (k1, k2); eqCons (b1, b2))
adamc@904 539
adamc@904 540 | (CKAbs (_, b1), CKAbs (_, b2)) => eqCons (b1, b2)
adamc@904 541 | (CKApp (c1, k1), CKApp (c2, k2)) => (eqCons (c1, c2); unifyKinds (k1, k2))
adamc@904 542 | (TKFun (_, c1), TKFun (_, c2)) => eqCons (c1, c2)
adamc@904 543
adamc@904 544 | (CName s1, CName s2) => if s1 = s2 then () else raise Unify
adamc@904 545
adamc@904 546 | (CRecord (k1, xcs1), CRecord (k2, xcs2)) =>
adamc@904 547 (unifyKinds (k1, k2);
adam@1575 548 if length xcs1 <> length xcs2 then
adam@1575 549 raise Unify
adam@1575 550 else
adam@1575 551 List.app (fn (x1, c1) =>
adam@1575 552 if List.exists (fn (x2, c2) => (eqCons (x1, x2); eqCons (c1, c2); true) handle Unify => false) xcs2 then
adam@1575 553 ()
adam@1575 554 else
adam@1575 555 raise Unify) xcs1)
adamc@904 556 | (CConcat (f1, x1), CConcat (f2, x2)) => (eqCons (f1, f2); eqCons (x1, x2))
adamc@904 557 | (CMap (d1, r1), CMap (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@904 558
adamc@904 559 | (CUnit, CUnit) => ()
adamc@904 560
adamc@904 561 | (CTuple cs1, CTuple cs2) => (ListPair.appEq (eqCons) (cs1, cs2)
adamc@904 562 handle ListPair.UnequalLengths => raise Unify)
adamc@904 563 | (CProj (c1, n1), CProj (c2, n2)) => (eqCons (c1, c2);
adamc@904 564 if n1 = n2 then () else raise Unify)
adamc@904 565
adamc@904 566 | _ => raise Unify
adamc@904 567
adam@1325 568 fun unifyCons (hnorm : con -> con) rs =
adamc@674 569 let
adamc@711 570 fun unify d (c1, c2) =
adam@1325 571 case (#1 (hnorm c1), #1 (hnorm c2)) of
adam@1639 572 (CUnif (nl, _, _, _, ref (Known c1)), _) => unify d (mliftConInCon nl c1, c2)
adam@1639 573 | (_, CUnif (nl, _, _, _, ref (Known c2))) => unify d (c1, mliftConInCon nl c2)
adamc@711 574
adamc@750 575 | (CUnif _, _) => ()
adamc@750 576
adamc@711 577 | (c1', CRel n2) =>
adamc@711 578 if n2 < d then
adamc@711 579 case c1' of
adamc@711 580 CRel n1 => if n1 = n2 then () else raise Unify
adamc@711 581 | _ => raise Unify
adamc@711 582 else if n2 - d >= length rs then
adamc@711 583 case c1' of
adamc@711 584 CRel n1 => if n1 = n2 - length rs then () else raise Unify
adamc@711 585 | _ => raise Unify
adamc@711 586 else
adamc@711 587 let
adamc@711 588 val r = List.nth (rs, n2 - d)
adamc@711 589 in
adamc@711 590 case !r of
adamc@711 591 NONE => r := SOME c1
adamc@904 592 | SOME c2 => eqCons (c1, c2)
adamc@711 593 end
adamc@711 594
adamc@711 595 | (TFun (d1, r1), TFun (d2, r2)) => (unify d (d1, d2); unify d (r1, r2))
adamc@711 596 | (TCFun (_, _, k1, r1), TCFun (_, _, k2, r2)) => (unifyKinds (k1, k2); unify (d + 1) (r1, r2))
adamc@711 597 | (TRecord c1, TRecord c2) => unify d (c1, c2)
adamc@711 598 | (TDisjoint (a1, b1, c1), TDisjoint (a2, b2, c2)) =>
adamc@711 599 (unify d (a1, a2); unify d (b1, b2); unify d (c1, c2))
adamc@711 600
adamc@711 601 | (CNamed n1, CNamed n2) => if n1 = n2 then () else raise Unify
adamc@711 602 | (CModProj (n1, ms1, x1), CModProj (n2, ms2, x2)) =>
adamc@711 603 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then () else raise Unify
adamc@711 604 | (CApp (f1, x1), CApp (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 605 | (CAbs (_, k1, b1), CAbs (_, k2, b2)) => (unifyKinds (k1, k2); unify (d + 1) (b1, b2))
adamc@711 606
adamc@711 607 | (CKAbs (_, b1), CKAbs (_, b2)) => unify d (b1, b2)
adamc@711 608 | (CKApp (c1, k1), CKApp (c2, k2)) => (unify d (c1, c2); unifyKinds (k1, k2))
adamc@711 609 | (TKFun (_, c1), TKFun (_, c2)) => unify d (c1, c2)
adamc@711 610
adamc@711 611 | (CName s1, CName s2) => if s1 = s2 then () else raise Unify
adamc@711 612
adamc@711 613 | (CRecord (k1, xcs1), CRecord (k2, xcs2)) =>
adamc@711 614 (unifyKinds (k1, k2);
adam@1575 615 if length xcs1 <> length xcs2 then
adam@1575 616 raise Unify
adam@1575 617 else
adam@1575 618 app (fn (x1, c1) =>
adam@1575 619 if List.exists (fn (x2, c2) => (unify d (x1, x2); unify d (c1, c2); true) handle Unify => false) xcs2 then
adam@1575 620 ()
adam@1575 621 else
adam@1575 622 raise Unify) xcs1)
adamc@711 623 | (CConcat (f1, x1), CConcat (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 624 | (CMap (d1, r1), CMap (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@711 625
adamc@711 626 | (CUnit, CUnit) => ()
adamc@711 627
adamc@711 628 | (CTuple cs1, CTuple cs2) => (ListPair.appEq (unify d) (cs1, cs2)
adamc@711 629 handle ListPair.UnequalLengths => raise Unify)
adamc@711 630 | (CProj (c1, n1), CProj (c2, n2)) => (unify d (c1, c2);
adamc@711 631 if n1 = n2 then () else raise Unify)
adamc@711 632
adamc@711 633 | _ => raise Unify
adamc@674 634 in
adamc@711 635 unify
adamc@674 636 end
adamc@674 637
adam@1325 638 fun tryUnify hnorm nRs (c1, c2) =
adamc@674 639 let
adamc@711 640 val rs = List.tabulate (nRs, fn _ => ref NONE)
adamc@674 641 in
adam@1325 642 (unifyCons hnorm rs 0 (c1, c2);
adamc@711 643 SOME (map (fn r => case !r of
adamc@711 644 NONE => raise Unify
adamc@711 645 | SOME c => c) rs))
adamc@711 646 handle Unify => NONE
adamc@674 647 end
adamc@674 648
adamc@711 649 fun unifySubst (rs : con list) =
adamc@711 650 U.Con.mapB {kind = fn _ => fn k => k,
adamc@711 651 con = fn d => fn c =>
adamc@711 652 case c of
adamc@711 653 CRel n =>
adamc@711 654 if n < d then
adamc@711 655 c
adamc@711 656 else
adamc@711 657 #1 (List.nth (rs, n - d))
adamc@711 658 | _ => c,
adamc@711 659 bind = fn (d, U.Con.RelC _) => d + 1
adamc@711 660 | (d, _) => d}
adamc@711 661 0
adamc@711 662
adamc@753 663 exception Bad of con * con
adamc@750 664
adamc@754 665 val hasUnif = U.Con.exists {kind = fn _ => false,
adam@1639 666 con = fn CUnif (_, _, _, _, ref (Unknown _)) => true
adamc@754 667 | _ => false}
adamc@754 668
adamc@754 669 fun startsWithUnif c =
adamc@754 670 let
adamc@754 671 fun firstArg (c, acc) =
adamc@754 672 case #1 c of
adamc@754 673 CApp (f, x) => firstArg (f, SOME x)
adamc@754 674 | _ => acc
adamc@754 675 in
adamc@754 676 case firstArg (c, NONE) of
adamc@754 677 NONE => false
adamc@754 678 | SOME x => hasUnif x
adamc@754 679 end
adamc@754 680
adamc@753 681 fun resolveClass (hnorm : con -> con) (consEq : con * con -> bool) (env : env) =
adamc@674 682 let
adamc@711 683 fun resolve c =
adamc@711 684 let
adamc@711 685 fun doHead f =
adamc@711 686 case CM.find (#classes env, f) of
adamc@711 687 NONE => NONE
adamc@711 688 | SOME class =>
adamc@711 689 let
adamc@711 690 val loc = #2 c
adamc@675 691
adamc@753 692 fun generalize (c as (_, loc)) =
adamc@753 693 case #1 c of
adamc@753 694 CApp (f, x) =>
adamc@753 695 let
adamc@753 696 val (f, equate) = generalize f
adamc@753 697
adamc@753 698 fun isRecord () =
adamc@753 699 let
adam@1639 700 val rk = ref (KUnknown (fn _ => true))
adamc@753 701 val k = (KUnif (loc, "k", rk), loc)
adam@1639 702 val r = ref (Unknown (fn _ => true))
adam@1303 703 val rc = (CUnif (0, loc, k, "x", r), loc)
adamc@753 704 in
adamc@753 705 ((CApp (f, rc), loc),
adamc@753 706 fn () => (if consEq (rc, x) then
adamc@753 707 true
adamc@753 708 else
adamc@753 709 (raise Bad (rc, x);
adamc@753 710 false))
adamc@753 711 andalso equate ())
adamc@753 712 end
adamc@753 713 in
adamc@753 714 case #1 x of
adamc@753 715 CConcat _ => isRecord ()
adamc@753 716 | CRecord _ => isRecord ()
adamc@753 717 | _ => ((CApp (f, x), loc), equate)
adamc@753 718 end
adamc@753 719 | _ => (c, fn () => true)
adamc@753 720
adamc@753 721 val (c, equate) = generalize c
adamc@753 722
adamc@711 723 fun tryRules rules =
adamc@711 724 case rules of
adamc@675 725 [] => NONE
adamc@711 726 | (nRs, cs, c', e) :: rules' =>
adam@1325 727 case tryUnify hnorm nRs (c, c') of
adamc@711 728 NONE => tryRules rules'
adamc@711 729 | SOME rs =>
adamc@675 730 let
adamc@711 731 val eos = map (resolve o unifySubst rs) cs
adamc@675 732 in
adamc@750 733 if List.exists (not o Option.isSome) eos
adamc@753 734 orelse not (equate ())
adamc@753 735 orelse not (consEq (c, unifySubst rs c')) then
adamc@711 736 tryRules rules'
adamc@711 737 else
adamc@711 738 let
adamc@711 739 val es = List.mapPartial (fn x => x) eos
adamc@711 740
adamc@711 741 val e = foldr (fn (c, e) => (ECApp (e, c), loc)) e rs
adamc@711 742 val e = foldl (fn (e', e) => (EApp (e, e'), loc)) e es
adamc@711 743 in
adamc@711 744 SOME e
adamc@711 745 end
adamc@675 746 end
adamc@711 747
adamc@711 748 fun rules () = tryRules (#rules class)
adamc@711 749
adamc@711 750 fun tryGrounds ces =
adamc@711 751 case ces of
adamc@711 752 [] => rules ()
adamc@711 753 | (c', e) :: ces' =>
adam@1325 754 case tryUnify hnorm 0 (c, c') of
adamc@711 755 NONE => tryGrounds ces'
adamc@711 756 | SOME _ => SOME e
adamc@675 757 in
adamc@711 758 tryGrounds (#ground class)
adamc@675 759 end
adamc@711 760 in
adamc@754 761 if startsWithUnif c then
adamc@754 762 NONE
adamc@754 763 else
adamc@754 764 case #1 c of
adamc@754 765 TRecord c =>
adamc@754 766 (case #1 (hnorm c) of
adamc@754 767 CRecord (_, xts) =>
adamc@754 768 let
adamc@754 769 fun resolver (xts, acc) =
adamc@754 770 case xts of
adamc@754 771 [] => SOME (ERecord acc, #2 c)
adamc@754 772 | (x, t) :: xts =>
adamc@754 773 let
adamc@754 774 val t = hnorm t
adamc@750 775
adamc@754 776 val t = case t of
adamc@754 777 (CApp (f, x), loc) => (CApp (hnorm f, hnorm x), loc)
adamc@754 778 | _ => t
adamc@754 779 in
adamc@754 780 case resolve t of
adamc@754 781 NONE => NONE
adamc@754 782 | SOME e => resolver (xts, (x, e, t) :: acc)
adamc@754 783 end
adamc@754 784 in
adamc@754 785 resolver (xts, [])
adamc@754 786 end
adamc@754 787 | _ => NONE)
adamc@754 788 | _ =>
adamc@754 789 case class_head_in c of
adamc@754 790 SOME f => doHead f
adamc@754 791 | _ => NONE
adamc@711 792 end
adamc@674 793 in
adamc@711 794 resolve
adamc@674 795 end
adamc@211 796
adamc@9 797 fun pushERel (env : env) x t =
adamc@9 798 let
adamc@9 799 val renameE = SM.map (fn Rel' (n, t) => Rel' (n+1, t)
adamc@9 800 | x => x) (#renameE env)
adamc@211 801
adamc@675 802 val classes = CM.map (fn class =>
adamc@711 803 {ground = map (fn (c, e) => (c, liftExp e)) (#ground class),
adamc@711 804 rules = #rules class}) (#classes env)
adamc@711 805 val classes = case class_head_in t of
adamc@211 806 NONE => classes
adamc@711 807 | SOME f =>
adamc@403 808 case CM.find (classes, f) of
adamc@403 809 NONE => classes
adamc@403 810 | SOME class =>
adamc@403 811 let
adamc@711 812 val class = {ground = (t, (ERel 0, #2 t)) :: #ground class,
adamc@711 813 rules = #rules class}
adamc@403 814 in
adamc@403 815 CM.insert (classes, f, class)
adamc@403 816 end
adamc@9 817 in
adamc@623 818 {renameK = #renameK env,
adamc@623 819 relK = #relK env,
adamc@623 820
adamc@623 821 renameC = #renameC env,
adamc@9 822 relC = #relC env,
adamc@9 823 namedC = #namedC env,
adamc@9 824
adamc@157 825 datatypes = #datatypes env,
adamc@171 826 constructors = #constructors env,
adamc@157 827
adamc@211 828 classes = classes,
adamc@211 829
adamc@9 830 renameE = SM.insert (renameE, x, Rel' (0, t)),
adamc@9 831 relE = (x, t) :: #relE env,
adamc@31 832 namedE = #namedE env,
adamc@31 833
adamc@31 834 renameSgn = #renameSgn env,
adamc@31 835 sgn = #sgn env,
adamc@31 836
adamc@31 837 renameStr = #renameStr env,
adamc@31 838 str = #str env}
adamc@9 839 end
adamc@9 840
adamc@9 841 fun lookupERel (env : env) n =
adamc@9 842 (List.nth (#relE env, n))
adamc@9 843 handle Subscript => raise UnboundRel n
adamc@9 844
adamc@674 845 fun rule_in c =
adamc@674 846 let
adamc@674 847 fun quantifiers (c, nvars) =
adamc@674 848 case #1 c of
adamc@674 849 TCFun (_, _, _, c) => quantifiers (c, nvars + 1)
adamc@674 850 | _ =>
adamc@674 851 let
adamc@674 852 fun clauses (c, hyps) =
adamc@674 853 case #1 c of
adamc@674 854 TFun (hyp, c) =>
adamc@711 855 (case class_head_in hyp of
adamc@711 856 SOME _ => clauses (c, hyp :: hyps)
adamc@711 857 | NONE => NONE)
adamc@674 858 | _ =>
adamc@711 859 case class_head_in c of
adamc@674 860 NONE => NONE
adamc@711 861 | SOME f => SOME (f, nvars, rev hyps, c)
adamc@674 862 in
adamc@674 863 clauses (c, [])
adamc@674 864 end
adamc@674 865 in
adamc@711 866 quantifiers (c, 0)
adamc@677 867 end
adamc@677 868
adamc@9 869 fun pushENamedAs (env : env) x n t =
adamc@211 870 let
adamc@211 871 val classes = #classes env
adamc@674 872 val classes = case rule_in t of
adamc@211 873 NONE => classes
adamc@711 874 | SOME (f, nvs, cs, c) =>
adamc@403 875 case CM.find (classes, f) of
adamc@403 876 NONE => classes
adamc@403 877 | SOME class =>
adamc@403 878 let
adamc@675 879 val e = (ENamed n, #2 t)
adamc@675 880
adamc@675 881 val class =
adamc@711 882 {ground = #ground class,
adamc@711 883 rules = (nvs, cs, c, e) :: #rules class}
adamc@403 884 in
adamc@403 885 CM.insert (classes, f, class)
adamc@403 886 end
adamc@211 887 in
adamc@623 888 {renameK = #renameK env,
adamc@623 889 relK = #relK env,
adamc@623 890
adamc@623 891 renameC = #renameC env,
adamc@211 892 relC = #relC env,
adamc@211 893 namedC = #namedC env,
adamc@9 894
adamc@211 895 datatypes = #datatypes env,
adamc@211 896 constructors = #constructors env,
adamc@157 897
adamc@211 898 classes = classes,
adamc@31 899
adamc@211 900 renameE = SM.insert (#renameE env, x, Named' (n, t)),
adamc@211 901 relE = #relE env,
adamc@211 902 namedE = IM.insert (#namedE env, n, (x, t)),
adamc@211 903
adamc@211 904 renameSgn = #renameSgn env,
adamc@211 905 sgn = #sgn env,
adamc@211 906
adamc@211 907 renameStr = #renameStr env,
adamc@211 908 str = #str env}
adamc@211 909 end
adamc@9 910
adamc@9 911 fun pushENamed env x t =
adamc@9 912 let
adamc@9 913 val n = !namedCounter
adamc@9 914 in
adamc@9 915 namedCounter := n + 1;
adamc@9 916 (pushENamedAs env x n t, n)
adamc@9 917 end
adamc@9 918
adamc@9 919 fun lookupENamed (env : env) n =
adamc@9 920 case IM.find (#namedE env, n) of
adamc@9 921 NONE => raise UnboundNamed n
adamc@9 922 | SOME x => x
adamc@9 923
adamc@471 924 fun checkENamed (env : env) n =
adamc@471 925 Option.isSome (IM.find (#namedE env, n))
adamc@471 926
adamc@9 927 fun lookupE (env : env) x =
adamc@9 928 case SM.find (#renameE env, x) of
adamc@9 929 NONE => NotBound
adamc@9 930 | SOME (Rel' x) => Rel x
adamc@9 931 | SOME (Named' x) => Named x
adamc@2 932
adamc@31 933 fun pushSgnNamedAs (env : env) x n sgis =
adamc@623 934 {renameK = #renameK env,
adamc@623 935 relK = #relK env,
adamc@623 936
adamc@623 937 renameC = #renameC env,
adamc@31 938 relC = #relC env,
adamc@31 939 namedC = #namedC env,
adamc@31 940
adamc@157 941 datatypes = #datatypes env,
adamc@171 942 constructors = #constructors env,
adamc@157 943
adamc@211 944 classes = #classes env,
adamc@211 945
adamc@31 946 renameE = #renameE env,
adamc@31 947 relE = #relE env,
adamc@31 948 namedE = #namedE env,
adamc@31 949
adamc@31 950 renameSgn = SM.insert (#renameSgn env, x, (n, sgis)),
adamc@31 951 sgn = IM.insert (#sgn env, n, (x, sgis)),
adamc@31 952
adamc@31 953 renameStr = #renameStr env,
adamc@31 954 str = #str env}
adamc@31 955
adamc@31 956 fun pushSgnNamed env x sgis =
adamc@31 957 let
adamc@31 958 val n = !namedCounter
adamc@31 959 in
adamc@31 960 namedCounter := n + 1;
adamc@31 961 (pushSgnNamedAs env x n sgis, n)
adamc@31 962 end
adamc@31 963
adamc@31 964 fun lookupSgnNamed (env : env) n =
adamc@31 965 case IM.find (#sgn env, n) of
adamc@31 966 NONE => raise UnboundNamed n
adamc@31 967 | SOME x => x
adamc@31 968
adamc@31 969 fun lookupSgn (env : env) x = SM.find (#renameSgn env, x)
adamc@31 970
adamc@31 971 fun lookupStrNamed (env : env) n =
adamc@31 972 case IM.find (#str env, n) of
adamc@31 973 NONE => raise UnboundNamed n
adamc@31 974 | SOME x => x
adamc@31 975
adamc@31 976 fun lookupStr (env : env) x = SM.find (#renameStr env, x)
adamc@31 977
adamc@203 978
adamc@216 979 fun sgiSeek (sgi, (sgns, strs, cons)) =
adamc@216 980 case sgi of
adamc@216 981 SgiConAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 982 | SgiCon (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@805 983 | SgiDatatype dts => (sgns, strs, foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts)
adamc@216 984 | SgiDatatypeImp (x, n, _, _, _, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 985 | SgiVal _ => (sgns, strs, cons)
adamc@216 986 | SgiSgn (x, n, _) => (IM.insert (sgns, n, x), strs, cons)
adamc@216 987 | SgiStr (x, n, _) => (sgns, IM.insert (strs, n, x), cons)
adamc@216 988 | SgiConstraint _ => (sgns, strs, cons)
adamc@563 989 | SgiClassAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@563 990 | SgiClass (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 991
adamc@34 992 fun sgnSeek f sgis =
adamc@34 993 let
adamc@59 994 fun seek (sgis, sgns, strs, cons) =
adamc@34 995 case sgis of
adamc@34 996 [] => NONE
adamc@34 997 | (sgi, _) :: sgis =>
adamc@34 998 case f sgi of
adamc@158 999 SOME v =>
adamc@158 1000 let
adamc@158 1001 val cons =
adamc@158 1002 case sgi of
adamc@805 1003 SgiDatatype dts => foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts
adamc@191 1004 | SgiDatatypeImp (x, n, _, _, _, _, _) => IM.insert (cons, n, x)
adamc@158 1005 | _ => cons
adamc@158 1006 in
adamc@158 1007 SOME (v, (sgns, strs, cons))
adamc@158 1008 end
adamc@88 1009 | NONE =>
adamc@216 1010 let
adamc@216 1011 val (sgns, strs, cons) = sgiSeek (sgi, (sgns, strs, cons))
adamc@216 1012 in
adamc@216 1013 seek (sgis, sgns, strs, cons)
adamc@216 1014 end
adamc@34 1015 in
adamc@59 1016 seek (sgis, IM.empty, IM.empty, IM.empty)
adamc@34 1017 end
adamc@34 1018
adamc@34 1019 fun id x = x
adamc@34 1020
adamc@34 1021 fun unravelStr (str, _) =
adamc@34 1022 case str of
adamc@34 1023 StrVar x => (x, [])
adamc@34 1024 | StrProj (str, m) =>
adamc@34 1025 let
adamc@34 1026 val (x, ms) = unravelStr str
adamc@34 1027 in
adamc@34 1028 (x, ms @ [m])
adamc@34 1029 end
adamc@34 1030 | _ => raise Fail "unravelStr"
adamc@34 1031
adamc@59 1032 fun sgnS_con (str, (sgns, strs, cons)) c =
adamc@34 1033 case c of
adamc@34 1034 CModProj (m1, ms, x) =>
adamc@34 1035 (case IM.find (strs, m1) of
adamc@34 1036 NONE => c
adamc@34 1037 | SOME m1x =>
adamc@34 1038 let
adamc@34 1039 val (m1, ms') = unravelStr str
adamc@34 1040 in
adamc@34 1041 CModProj (m1, ms' @ m1x :: ms, x)
adamc@34 1042 end)
adamc@34 1043 | CNamed n =>
adamc@34 1044 (case IM.find (cons, n) of
adamc@34 1045 NONE => c
adamc@34 1046 | SOME nx =>
adamc@34 1047 let
adamc@34 1048 val (m1, ms) = unravelStr str
adamc@34 1049 in
adamc@34 1050 CModProj (m1, ms, nx)
adamc@34 1051 end)
adamc@34 1052 | _ => c
adamc@34 1053
adamc@721 1054 fun sgnS_con' (m1, ms', (sgns, strs, cons)) =
adamc@721 1055 U.Con.map {kind = fn x => x,
adamc@721 1056 con = fn c =>
adamc@721 1057 case c of
kkallio@1454 1058 CModProj (m1', ms, x) =>
kkallio@1454 1059 (case IM.find (strs, m1') of
adamc@721 1060 NONE => c
adamc@721 1061 | SOME m1x => CModProj (m1, ms' @ m1x :: ms, x))
adamc@721 1062 | CNamed n =>
adamc@721 1063 (case IM.find (cons, n) of
adamc@721 1064 NONE => c
adamc@721 1065 | SOME nx => CModProj (m1, ms', nx))
adamc@721 1066 | _ => c}
adamc@216 1067
adamc@59 1068 fun sgnS_sgn (str, (sgns, strs, cons)) sgn =
adamc@59 1069 case sgn of
adamc@59 1070 SgnProj (m1, ms, x) =>
adamc@59 1071 (case IM.find (strs, m1) of
adamc@59 1072 NONE => sgn
adamc@59 1073 | SOME m1x =>
adamc@59 1074 let
adamc@59 1075 val (m1, ms') = unravelStr str
adamc@59 1076 in
adamc@59 1077 SgnProj (m1, ms' @ m1x :: ms, x)
adamc@59 1078 end)
adamc@59 1079 | SgnVar n =>
adamc@59 1080 (case IM.find (sgns, n) of
adamc@59 1081 NONE => sgn
adamc@59 1082 | SOME nx =>
adamc@59 1083 let
adamc@59 1084 val (m1, ms) = unravelStr str
adamc@59 1085 in
adamc@59 1086 SgnProj (m1, ms, nx)
adamc@59 1087 end)
adamc@59 1088 | _ => sgn
adamc@59 1089
adamc@59 1090 fun sgnSubSgn x =
adamc@34 1091 ElabUtil.Sgn.map {kind = id,
adamc@59 1092 con = sgnS_con x,
adamc@34 1093 sgn_item = id,
adamc@59 1094 sgn = sgnS_sgn x}
adamc@34 1095
adamc@211 1096
adamc@211 1097
adamc@211 1098 and projectSgn env {sgn, str, field} =
adamc@211 1099 case #1 (hnormSgn env sgn) of
adamc@211 1100 SgnConst sgis =>
adamc@211 1101 (case sgnSeek (fn SgiSgn (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@211 1102 NONE => NONE
adamc@211 1103 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@211 1104 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@211 1105 | _ => NONE
adamc@211 1106
adamc@211 1107 and hnormSgn env (all as (sgn, loc)) =
adamc@34 1108 case sgn of
adamc@42 1109 SgnError => all
adamc@42 1110 | SgnVar n => hnormSgn env (#2 (lookupSgnNamed env n))
adamc@42 1111 | SgnConst _ => all
adamc@42 1112 | SgnFun _ => all
adamc@59 1113 | SgnProj (m, ms, x) =>
adamc@59 1114 let
adamc@59 1115 val (_, sgn) = lookupStrNamed env m
adamc@59 1116 in
adamc@59 1117 case projectSgn env {str = foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms,
adamc@59 1118 sgn = sgn,
adamc@59 1119 field = x} of
adamc@59 1120 NONE => raise Fail "ElabEnv.hnormSgn: projectSgn failed"
adamc@1058 1121 | SOME sgn => hnormSgn env sgn
adamc@59 1122 end
adamc@42 1123 | SgnWhere (sgn, x, c) =>
adamc@42 1124 case #1 (hnormSgn env sgn) of
adamc@42 1125 SgnError => (SgnError, loc)
adamc@42 1126 | SgnConst sgis =>
adamc@42 1127 let
adamc@42 1128 fun traverse (pre, post) =
adamc@42 1129 case post of
adamc@42 1130 [] => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [1]"
adamc@42 1131 | (sgi as (SgiConAbs (x', n, k), loc)) :: rest =>
adamc@42 1132 if x = x' then
adamc@42 1133 List.revAppend (pre, (SgiCon (x', n, k, c), loc) :: rest)
adamc@42 1134 else
adamc@42 1135 traverse (sgi :: pre, rest)
adamc@42 1136 | sgi :: rest => traverse (sgi :: pre, rest)
adamc@42 1137
adamc@42 1138 val sgis = traverse ([], sgis)
adamc@42 1139 in
adamc@42 1140 (SgnConst sgis, loc)
adamc@42 1141 end
adamc@42 1142 | _ => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [2]"
adamc@42 1143
adamc@849 1144 fun manifest (m, ms, loc) =
adamc@849 1145 foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms
adamc@849 1146
adamc@211 1147 fun enrichClasses env classes (m1, ms) sgn =
adamc@59 1148 case #1 (hnormSgn env sgn) of
adamc@59 1149 SgnConst sgis =>
adamc@211 1150 let
adamc@218 1151 val (classes, _, _, _) =
adamc@218 1152 foldl (fn (sgi, (classes, newClasses, fmap, env)) =>
adamc@211 1153 let
adamc@211 1154 fun found (x, n) =
adamc@211 1155 (CM.insert (classes,
adamc@211 1156 ClProj (m1, ms, x),
adamc@211 1157 empty_class),
adamc@216 1158 IM.insert (newClasses, n, x),
adamc@218 1159 sgiSeek (#1 sgi, fmap),
adamc@218 1160 env)
adamc@216 1161
adamc@218 1162 fun default () = (classes, newClasses, sgiSeek (#1 sgi, fmap), env)
adamc@211 1163 in
adamc@211 1164 case #1 sgi of
adamc@217 1165 SgiStr (x, _, sgn) =>
adamc@849 1166 let
adamc@849 1167 val str = manifest (m1, ms, #2 sgi)
adamc@849 1168 val sgn' = sgnSubSgn (str, fmap) sgn
adamc@849 1169 in
adamc@849 1170 (enrichClasses env classes (m1, ms @ [x]) sgn',
adamc@849 1171 newClasses,
adamc@849 1172 sgiSeek (#1 sgi, fmap),
adamc@849 1173 env)
adamc@849 1174 end
adamc@218 1175 | SgiSgn (x, n, sgn) =>
adamc@218 1176 (classes,
adamc@218 1177 newClasses,
adamc@218 1178 fmap,
adamc@218 1179 pushSgnNamedAs env x n sgn)
adamc@218 1180
adamc@563 1181 | SgiClassAbs (x, n, _) => found (x, n)
adamc@563 1182 | SgiClass (x, n, _, _) => found (x, n)
adamc@674 1183 | SgiVal (x, n, c) =>
adamc@674 1184 (case rule_in c of
adamc@674 1185 NONE => default ()
adamc@711 1186 | SOME (cn, nvs, cs, c) =>
adamc@674 1187 let
adamc@711 1188 val loc = #2 c
adamc@721 1189 val globalize = sgnS_con' (m1, ms, fmap)
adamc@674 1190
adamc@674 1191 val nc =
adamc@674 1192 case cn of
adamc@674 1193 ClNamed f => IM.find (newClasses, f)
adamc@674 1194 | _ => NONE
adamc@674 1195 in
adamc@674 1196 case nc of
adamc@674 1197 NONE =>
adamc@419 1198 let
adamc@419 1199 val classes =
adamc@419 1200 case CM.find (classes, cn) of
adamc@419 1201 NONE => classes
adamc@419 1202 | SOME class =>
adamc@419 1203 let
adamc@711 1204 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1205
adamc@675 1206 val class =
adamc@711 1207 {ground = #ground class,
adamc@711 1208 rules = (nvs,
adamc@711 1209 map globalize cs,
adamc@711 1210 globalize c,
adamc@711 1211 e) :: #rules class}
adamc@419 1212 in
adamc@419 1213 CM.insert (classes, cn, class)
adamc@419 1214 end
adamc@419 1215 in
adamc@419 1216 (classes,
adamc@419 1217 newClasses,
adamc@419 1218 fmap,
adamc@419 1219 env)
adamc@419 1220 end
adamc@674 1221 | SOME fx =>
adamc@674 1222 let
adamc@674 1223 val cn = ClProj (m1, ms, fx)
adamc@419 1224
adamc@674 1225 val classes =
adamc@674 1226 case CM.find (classes, cn) of
adamc@674 1227 NONE => classes
adamc@674 1228 | SOME class =>
adamc@674 1229 let
adamc@675 1230 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1231
adamc@675 1232 val class =
adamc@711 1233 {ground = #ground class,
adamc@711 1234 rules = (nvs,
adamc@711 1235 map globalize cs,
adamc@711 1236 globalize c,
adamc@711 1237 e) :: #rules class}
adamc@674 1238 in
adamc@674 1239 CM.insert (classes, cn, class)
adamc@674 1240 end
adamc@674 1241 in
adamc@674 1242 (classes,
adamc@674 1243 newClasses,
adamc@674 1244 fmap,
adamc@674 1245 env)
adamc@674 1246 end
adamc@674 1247 end)
adamc@216 1248 | _ => default ()
adamc@211 1249 end)
adamc@218 1250 (classes, IM.empty, (IM.empty, IM.empty, IM.empty), env) sgis
adamc@211 1251 in
adamc@211 1252 classes
adamc@211 1253 end
adamc@211 1254 | _ => classes
adamc@211 1255
adamc@211 1256 fun pushStrNamedAs (env : env) x n sgn =
adamc@623 1257 {renameK = #renameK env,
adamc@623 1258 relK = #relK env,
adamc@623 1259
adamc@623 1260 renameC = #renameC env,
adamc@211 1261 relC = #relC env,
adamc@211 1262 namedC = #namedC env,
adamc@211 1263
adamc@211 1264 datatypes = #datatypes env,
adamc@211 1265 constructors = #constructors env,
adamc@211 1266
adamc@211 1267 classes = enrichClasses env (#classes env) (n, []) sgn,
adamc@211 1268
adamc@211 1269 renameE = #renameE env,
adamc@211 1270 relE = #relE env,
adamc@211 1271 namedE = #namedE env,
adamc@211 1272
adamc@211 1273 renameSgn = #renameSgn env,
adamc@211 1274 sgn = #sgn env,
adamc@211 1275
adamc@211 1276 renameStr = SM.insert (#renameStr env, x, (n, sgn)),
adamc@211 1277 str = IM.insert (#str env, n, (x, sgn))}
adamc@211 1278
adamc@211 1279 fun pushStrNamed env x sgn =
adamc@211 1280 let
adamc@211 1281 val n = !namedCounter
adamc@211 1282 in
adamc@211 1283 namedCounter := n + 1;
adamc@211 1284 (pushStrNamedAs env x n sgn, n)
adamc@211 1285 end
adamc@211 1286
adamc@211 1287 fun sgiBinds env (sgi, loc) =
adamc@211 1288 case sgi of
adamc@211 1289 SgiConAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@211 1290 | SgiCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@805 1291 | SgiDatatype dts =>
adamc@211 1292 let
adamc@805 1293 fun doOne ((x, n, xs, xncs), env) =
adamc@805 1294 let
adamc@805 1295 val k = (KType, loc)
adamc@805 1296 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1297
adamc@805 1298 val env = pushCNamedAs env x n k' NONE
adamc@805 1299 in
adamc@805 1300 foldl (fn ((x', n', to), env) =>
adamc@805 1301 let
adamc@805 1302 val t =
adamc@805 1303 case to of
adamc@805 1304 NONE => (CNamed n, loc)
adamc@805 1305 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@805 1306
adamc@805 1307 val k = (KType, loc)
adamc@805 1308 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@805 1309 in
adamc@805 1310 pushENamedAs env x' n' t
adamc@805 1311 end)
adamc@805 1312 env xncs
adamc@805 1313 end
adamc@211 1314 in
adamc@805 1315 foldl doOne env dts
adamc@211 1316 end
adamc@211 1317 | SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@211 1318 let
adamc@341 1319 val k = (KType, loc)
adamc@341 1320 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1321
adamc@341 1322 val env = pushCNamedAs env x n k' (SOME (CModProj (m1, ms, x'), loc))
adamc@211 1323 in
adamc@211 1324 foldl (fn ((x', n', to), env) =>
adamc@211 1325 let
adamc@211 1326 val t =
adamc@211 1327 case to of
adamc@211 1328 NONE => (CNamed n, loc)
adamc@211 1329 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@211 1330
adamc@211 1331 val k = (KType, loc)
adamc@211 1332 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@211 1333 in
adamc@211 1334 pushENamedAs env x' n' t
adamc@211 1335 end)
adamc@211 1336 env xncs
adamc@211 1337 end
adamc@211 1338 | SgiVal (x, n, t) => pushENamedAs env x n t
adamc@211 1339 | SgiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@211 1340 | SgiSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@211 1341 | SgiConstraint _ => env
adamc@211 1342
adamc@711 1343 | SgiClassAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@711 1344 | SgiClass (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@459 1345
adamc@211 1346 fun sgnSubCon x =
adamc@211 1347 ElabUtil.Con.map {kind = id,
adamc@211 1348 con = sgnS_con x}
adamc@59 1349
adamc@59 1350 fun projectStr env {sgn, str, field} =
adamc@59 1351 case #1 (hnormSgn env sgn) of
adamc@59 1352 SgnConst sgis =>
adamc@59 1353 (case sgnSeek (fn SgiStr (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@59 1354 NONE => NONE
adamc@59 1355 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@59 1356 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@59 1357 | _ => NONE
adamc@59 1358
adamc@158 1359 fun chaseMpath env (n, ms) =
adamc@158 1360 let
adamc@158 1361 val (_, sgn) = lookupStrNamed env n
adamc@158 1362 in
adamc@158 1363 foldl (fn (m, (str, sgn)) =>
adamc@158 1364 case projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1365 NONE => raise Fail "kindof: Unknown substructure"
adamc@158 1366 | SOME sgn => ((StrProj (str, m), #2 sgn), sgn))
adamc@158 1367 ((StrVar n, #2 sgn), sgn) ms
adamc@158 1368 end
adamc@158 1369
adamc@42 1370 fun projectCon env {sgn, str, field} =
adamc@42 1371 case #1 (hnormSgn env sgn) of
adamc@34 1372 SgnConst sgis =>
adamc@34 1373 (case sgnSeek (fn SgiConAbs (x, _, k) => if x = field then SOME (k, NONE) else NONE
adamc@34 1374 | SgiCon (x, _, k, c) => if x = field then SOME (k, SOME c) else NONE
adamc@805 1375 | SgiDatatype dts =>
adamc@805 1376 (case List.find (fn (x, _, xs, _) => x = field) dts of
adamc@805 1377 SOME (_, _, xs, _) =>
adamc@805 1378 let
adamc@805 1379 val k = (KType, #2 sgn)
adamc@805 1380 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@805 1381 in
adamc@805 1382 SOME (k', NONE)
adamc@805 1383 end
adamc@805 1384 | NONE => NONE)
adamc@341 1385 | SgiDatatypeImp (x, _, m1, ms, x', xs, _) =>
adamc@341 1386 if x = field then
adamc@341 1387 let
adamc@341 1388 val k = (KType, #2 sgn)
adamc@341 1389 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@341 1390 in
adamc@341 1391 SOME (k', SOME (CModProj (m1, ms, x'), #2 sgn))
adamc@341 1392 end
adamc@158 1393 else
adamc@158 1394 NONE
adamc@563 1395 | SgiClassAbs (x, _, k) => if x = field then
kkallio@1453 1396 SOME (k, NONE)
adamc@563 1397 else
adamc@563 1398 NONE
adamc@563 1399 | SgiClass (x, _, k, c) => if x = field then
kkallio@1453 1400 SOME (k, SOME c)
adamc@563 1401 else
adamc@563 1402 NONE
adamc@34 1403 | _ => NONE) sgis of
adamc@34 1404 NONE => NONE
adamc@34 1405 | SOME ((k, co), subs) => SOME (k, Option.map (sgnSubCon (str, subs)) co))
adamc@34 1406 | SgnError => SOME ((KError, ErrorMsg.dummySpan), SOME (CError, ErrorMsg.dummySpan))
adamc@42 1407 | _ => NONE
adamc@34 1408
adamc@157 1409 fun projectDatatype env {sgn, str, field} =
adamc@157 1410 case #1 (hnormSgn env sgn) of
adamc@157 1411 SgnConst sgis =>
adamc@805 1412 (case sgnSeek (fn SgiDatatype dts =>
adamc@805 1413 (case List.find (fn (x, _, _, _) => x = field) dts of
adamc@805 1414 SOME (_, _, xs, xncs) => SOME (xs, xncs)
adamc@805 1415 | NONE => NONE)
adamc@191 1416 | SgiDatatypeImp (x, _, _, _, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
adamc@157 1417 | _ => NONE) sgis of
adamc@157 1418 NONE => NONE
adamc@191 1419 | SOME ((xs, xncs), subs) => SOME (xs,
adamc@191 1420 map (fn (x, n, to) => (x, n, Option.map (sgnSubCon (str, subs)) to)) xncs))
adamc@157 1421 | _ => NONE
adamc@157 1422
adamc@174 1423 fun projectConstructor env {sgn, str, field} =
adamc@174 1424 case #1 (hnormSgn env sgn) of
adamc@174 1425 SgnConst sgis =>
adamc@174 1426 let
adamc@191 1427 fun consider (n, xs, xncs) =
adamc@174 1428 ListUtil.search (fn (x, n', to) =>
adamc@174 1429 if x <> field then
adamc@174 1430 NONE
adamc@174 1431 else
adamc@191 1432 SOME (U.classifyDatatype xncs, n', xs, to, (CNamed n, #2 str))) xncs
adamc@174 1433 in
adamc@805 1434 case sgnSeek (fn SgiDatatype dts =>
adamc@805 1435 let
adamc@805 1436 fun search dts =
adamc@805 1437 case dts of
adamc@805 1438 [] => NONE
adamc@805 1439 | (_, n, xs, xncs) :: dts =>
adamc@805 1440 case consider (n, xs, xncs) of
adamc@805 1441 NONE => search dts
adamc@805 1442 | v => v
adamc@805 1443 in
adamc@805 1444 search dts
adamc@805 1445 end
adamc@191 1446 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => consider (n, xs, xncs)
adamc@174 1447 | _ => NONE) sgis of
adamc@174 1448 NONE => NONE
adamc@191 1449 | SOME ((dk, n, xs, to, t), subs) => SOME (dk, n, xs, Option.map (sgnSubCon (str, subs)) to,
adamc@191 1450 sgnSubCon (str, subs) t)
adamc@174 1451 end
adamc@174 1452 | _ => NONE
adamc@174 1453
adamc@42 1454 fun projectVal env {sgn, str, field} =
adamc@42 1455 case #1 (hnormSgn env sgn) of
adamc@34 1456 SgnConst sgis =>
adamc@162 1457 let
adamc@191 1458 fun seek (n, xs, xncs) =
adamc@162 1459 ListUtil.search (fn (x, _, to) =>
adamc@162 1460 if x = field then
adamc@191 1461 SOME (let
adamc@467 1462 val base = (CNamed n, #2 sgn)
adamc@467 1463 val nxs = length xs
adamc@467 1464 val base = ListUtil.foldli (fn (i, _, base) =>
adamc@467 1465 (CApp (base,
adamc@467 1466 (CRel (nxs - i - 1), #2 sgn)),
adamc@467 1467 #2 sgn))
adamc@467 1468 base xs
adamc@467 1469
adamc@191 1470 val t =
adamc@191 1471 case to of
adamc@467 1472 NONE => base
adamc@467 1473 | SOME t => (TFun (t, base), #2 sgn)
adamc@191 1474 val k = (KType, #2 sgn)
adamc@191 1475 in
adamc@467 1476 foldr (fn (x, t) => (TCFun (Implicit, x, k, t), #2 sgn))
adamc@191 1477 t xs
adamc@191 1478 end)
adamc@162 1479 else
adamc@162 1480 NONE) xncs
adamc@162 1481 in
adamc@162 1482 case sgnSeek (fn SgiVal (x, _, c) => if x = field then SOME c else NONE
adamc@805 1483 | SgiDatatype dts =>
adamc@805 1484 let
adamc@805 1485 fun search dts =
adamc@805 1486 case dts of
adamc@805 1487 [] => NONE
adamc@805 1488 | (_, n, xs, xncs) :: dts =>
adamc@805 1489 case seek (n, xs, xncs) of
adamc@805 1490 NONE => search dts
adamc@805 1491 | v => v
adamc@805 1492 in
adamc@805 1493 search dts
adamc@805 1494 end
adamc@191 1495 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => seek (n, xs, xncs)
adamc@162 1496 | _ => NONE) sgis of
adamc@162 1497 NONE => NONE
adamc@162 1498 | SOME (c, subs) => SOME (sgnSubCon (str, subs) c)
adamc@162 1499 end
adamc@34 1500 | SgnError => SOME (CError, ErrorMsg.dummySpan)
adamc@42 1501 | _ => NONE
adamc@34 1502
adamc@88 1503 fun sgnSeekConstraints (str, sgis) =
adamc@88 1504 let
adamc@88 1505 fun seek (sgis, sgns, strs, cons, acc) =
adamc@88 1506 case sgis of
adamc@88 1507 [] => acc
adamc@88 1508 | (sgi, _) :: sgis =>
adamc@88 1509 case sgi of
adamc@88 1510 SgiConstraint (c1, c2) =>
adamc@88 1511 let
adamc@88 1512 val sub = sgnSubCon (str, (sgns, strs, cons))
adamc@88 1513 in
adamc@88 1514 seek (sgis, sgns, strs, cons, (sub c1, sub c2) :: acc)
adamc@88 1515 end
adamc@88 1516 | SgiConAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1517 | SgiCon (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@805 1518 | SgiDatatype dts => seek (sgis, sgns, strs,
adamc@805 1519 foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts, acc)
adamc@191 1520 | SgiDatatypeImp (x, n, _, _, _, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1521 | SgiVal _ => seek (sgis, sgns, strs, cons, acc)
adamc@88 1522 | SgiSgn (x, n, _) => seek (sgis, IM.insert (sgns, n, x), strs, cons, acc)
adamc@88 1523 | SgiStr (x, n, _) => seek (sgis, sgns, IM.insert (strs, n, x), cons, acc)
adamc@563 1524 | SgiClassAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@563 1525 | SgiClass (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1526 in
adamc@88 1527 seek (sgis, IM.empty, IM.empty, IM.empty, [])
adamc@88 1528 end
adamc@88 1529
adamc@88 1530 fun projectConstraints env {sgn, str} =
adamc@88 1531 case #1 (hnormSgn env sgn) of
adamc@88 1532 SgnConst sgis => SOME (sgnSeekConstraints (str, sgis))
adamc@88 1533 | SgnError => SOME []
adamc@88 1534 | _ => NONE
adamc@34 1535
adamc@825 1536 fun patBinds env (p, loc) =
adamc@825 1537 case p of
adamc@825 1538 PWild => env
adamc@825 1539 | PVar (x, t) => pushERel env x t
adamc@825 1540 | PPrim _ => env
adamc@825 1541 | PCon (_, _, _, NONE) => env
adamc@825 1542 | PCon (_, _, _, SOME p) => patBinds env p
adamc@825 1543 | PRecord xps => foldl (fn ((_, p, _), env) => patBinds env p) env xps
adamc@825 1544
adamc@1272 1545 fun patBindsN (p, _) =
adamc@1272 1546 case p of
adamc@1272 1547 PWild => 0
adamc@1272 1548 | PVar _ => 1
adamc@1272 1549 | PPrim _ => 0
adamc@1272 1550 | PCon (_, _, _, NONE) => 0
adamc@1272 1551 | PCon (_, _, _, SOME p) => patBindsN p
adamc@1272 1552 | PRecord xps => foldl (fn ((_, p, _), n) => patBindsN p + n) 0 xps
adamc@1272 1553
adamc@447 1554 fun edeclBinds env (d, loc) =
adamc@447 1555 case d of
adamc@825 1556 EDVal (p, _, _) => patBinds env p
adamc@447 1557 | EDValRec vis => foldl (fn ((x, t, _), env) => pushERel env x t) env vis
adamc@447 1558
adamc@157 1559 fun declBinds env (d, loc) =
adamc@157 1560 case d of
adamc@157 1561 DCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@805 1562 | DDatatype dts =>
adamc@157 1563 let
adamc@805 1564 fun doOne ((x, n, xs, xncs), env) =
adamc@805 1565 let
adamc@805 1566 val k = (KType, loc)
adamc@805 1567 val nxs = length xs
adamc@805 1568 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@805 1569 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@805 1570 (KArrow (k, kb), loc)))
adamc@805 1571 ((CNamed n, loc), k) xs
adamc@805 1572
adamc@805 1573 val env = pushCNamedAs env x n kb NONE
adamc@805 1574 val env = pushDatatype env n xs xncs
adamc@805 1575 in
adamc@805 1576 foldl (fn ((x', n', to), env) =>
adamc@805 1577 let
adamc@805 1578 val t =
adamc@805 1579 case to of
adamc@805 1580 NONE => tb
adamc@805 1581 | SOME t => (TFun (t, tb), loc)
adamc@805 1582 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@805 1583 in
adamc@805 1584 pushENamedAs env x' n' t
adamc@805 1585 end)
adamc@805 1586 env xncs
adamc@805 1587 end
adamc@157 1588 in
adamc@805 1589 foldl doOne env dts
adamc@157 1590 end
adamc@191 1591 | DDatatypeImp (x, n, m, ms, x', xs, xncs) =>
adamc@157 1592 let
adamc@157 1593 val t = (CModProj (m, ms, x'), loc)
adamc@297 1594 val k = (KType, loc)
adamc@297 1595 val nxs = length xs
adamc@297 1596 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@297 1597 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@297 1598 (KArrow (k, kb), loc)))
adamc@297 1599 ((CNamed n, loc), k) xs
adamc@297 1600
adamc@341 1601 val env = pushCNamedAs env x n kb (SOME t)
adamc@191 1602 val env = pushDatatype env n xs xncs
adamc@157 1603 in
adamc@191 1604 foldl (fn ((x', n', to), env) =>
adamc@191 1605 let
adamc@191 1606 val t =
adamc@191 1607 case to of
adamc@297 1608 NONE => tb
adamc@297 1609 | SOME t => (TFun (t, tb), loc)
adamc@297 1610 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@191 1611 in
adamc@191 1612 pushENamedAs env x' n' t
adamc@191 1613 end)
adamc@191 1614 env xncs
adamc@157 1615 end
adamc@157 1616 | DVal (x, n, t, _) => pushENamedAs env x n t
adamc@157 1617 | DValRec vis => foldl (fn ((x, n, t, _), env) => pushENamedAs env x n t) env vis
adamc@157 1618 | DSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@157 1619 | DStr (x, n, sgn, _) => pushStrNamedAs env x n sgn
adamc@157 1620 | DFfiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@157 1621 | DConstraint _ => env
adamc@157 1622 | DExport _ => env
adamc@707 1623 | DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@205 1624 let
adamc@705 1625 val ct = (CModProj (tn, [], "sql_table"), loc)
adamc@705 1626 val ct = (CApp (ct, c), loc)
adamc@707 1627 val ct = (CApp (ct, (CConcat (pc, cc), loc)), loc)
adamc@338 1628 in
adamc@705 1629 pushENamedAs env x n ct
adamc@338 1630 end
adamc@338 1631 | DSequence (tn, x, n) =>
adamc@338 1632 let
adamc@338 1633 val t = (CModProj (tn, [], "sql_sequence"), loc)
adamc@205 1634 in
adamc@205 1635 pushENamedAs env x n t
adamc@205 1636 end
adamc@754 1637 | DView (tn, x, n, _, c) =>
adamc@754 1638 let
adamc@754 1639 val ct = (CModProj (tn, [], "sql_view"), loc)
adamc@754 1640 val ct = (CApp (ct, c), loc)
adamc@754 1641 in
adamc@754 1642 pushENamedAs env x n ct
adamc@754 1643 end
adamc@563 1644 | DClass (x, n, k, c) =>
adamc@213 1645 let
adamc@563 1646 val k = (KArrow (k, (KType, loc)), loc)
adamc@213 1647 val env = pushCNamedAs env x n k (SOME c)
adamc@213 1648 in
adamc@213 1649 pushClass env n
adamc@213 1650 end
adamc@271 1651 | DDatabase _ => env
adamc@459 1652 | DCookie (tn, x, n, c) =>
adamc@459 1653 let
adamc@459 1654 val t = (CApp ((CModProj (tn, [], "cookie"), loc), c), loc)
adamc@459 1655 in
adamc@459 1656 pushENamedAs env x n t
adamc@459 1657 end
adamc@720 1658 | DStyle (tn, x, n) =>
adamc@718 1659 let
adamc@720 1660 val t = (CModProj (tn, [], "css_class"), loc)
adamc@718 1661 in
adamc@718 1662 pushENamedAs env x n t
adamc@718 1663 end
adamc@1075 1664 | DTask _ => env
adamc@1199 1665 | DPolicy _ => env
adam@1294 1666 | DOnError _ => env
adamc@157 1667
adamc@2 1668 end