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annotate src/elab_env.sml @ 1428:58c9c039582a

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Deal with Postgres's wonky type-changing for nullable columns of views
author Adam Chlipala <adam@chlipala.net>
date Fri, 25 Feb 2011 15:46:29 -0500
parents fdf48f6ba418
children 03642b83b57b
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@1303 487 | CUnif (_, _, _, _, ref (SOME 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@1303 501 | CUnif (_, _, _, _, ref (SOME 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)
adamc@711 515 | (KUnif (_, _, ref (SOME k1)), _) => unifyKinds (k1, k2)
adamc@711 516 | (_, KUnif (_, _, ref (SOME 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@1303 523 (CUnif (nl, _, _, _, ref (SOME c1)), _) => eqCons (mliftConInCon nl c1, c2)
adam@1303 524 | (_, CUnif (nl, _, _, _, ref (SOME 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);
adamc@904 548 ListPair.appEq (fn ((x1, c1), (x2, c2)) => (eqCons (x1, x2); eqCons (c1, c2))) (xcs1, xcs2)
adamc@904 549 handle ListPair.UnequalLengths => raise Unify)
adamc@904 550 | (CConcat (f1, x1), CConcat (f2, x2)) => (eqCons (f1, f2); eqCons (x1, x2))
adamc@904 551 | (CMap (d1, r1), CMap (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@904 552
adamc@904 553 | (CUnit, CUnit) => ()
adamc@904 554
adamc@904 555 | (CTuple cs1, CTuple cs2) => (ListPair.appEq (eqCons) (cs1, cs2)
adamc@904 556 handle ListPair.UnequalLengths => raise Unify)
adamc@904 557 | (CProj (c1, n1), CProj (c2, n2)) => (eqCons (c1, c2);
adamc@904 558 if n1 = n2 then () else raise Unify)
adamc@904 559
adamc@904 560 | _ => raise Unify
adamc@904 561
adam@1325 562 fun unifyCons (hnorm : con -> con) rs =
adamc@674 563 let
adamc@711 564 fun unify d (c1, c2) =
adam@1325 565 case (#1 (hnorm c1), #1 (hnorm c2)) of
adam@1303 566 (CUnif (nl, _, _, _, ref (SOME c1)), _) => unify d (mliftConInCon nl c1, c2)
adam@1303 567 | (_, CUnif (nl, _, _, _, ref (SOME c2))) => unify d (c1, mliftConInCon nl c2)
adamc@711 568
adamc@750 569 | (CUnif _, _) => ()
adamc@750 570
adamc@711 571 | (c1', CRel n2) =>
adamc@711 572 if n2 < d then
adamc@711 573 case c1' of
adamc@711 574 CRel n1 => if n1 = n2 then () else raise Unify
adamc@711 575 | _ => raise Unify
adamc@711 576 else if n2 - d >= length rs then
adamc@711 577 case c1' of
adamc@711 578 CRel n1 => if n1 = n2 - length rs then () else raise Unify
adamc@711 579 | _ => raise Unify
adamc@711 580 else
adamc@711 581 let
adamc@711 582 val r = List.nth (rs, n2 - d)
adamc@711 583 in
adamc@711 584 case !r of
adamc@711 585 NONE => r := SOME c1
adamc@904 586 | SOME c2 => eqCons (c1, c2)
adamc@711 587 end
adamc@711 588
adamc@711 589 | (TFun (d1, r1), TFun (d2, r2)) => (unify d (d1, d2); unify d (r1, r2))
adamc@711 590 | (TCFun (_, _, k1, r1), TCFun (_, _, k2, r2)) => (unifyKinds (k1, k2); unify (d + 1) (r1, r2))
adamc@711 591 | (TRecord c1, TRecord c2) => unify d (c1, c2)
adamc@711 592 | (TDisjoint (a1, b1, c1), TDisjoint (a2, b2, c2)) =>
adamc@711 593 (unify d (a1, a2); unify d (b1, b2); unify d (c1, c2))
adamc@711 594
adamc@711 595 | (CNamed n1, CNamed n2) => if n1 = n2 then () else raise Unify
adamc@711 596 | (CModProj (n1, ms1, x1), CModProj (n2, ms2, x2)) =>
adamc@711 597 if n1 = n2 andalso ms1 = ms2 andalso x1 = x2 then () else raise Unify
adamc@711 598 | (CApp (f1, x1), CApp (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 599 | (CAbs (_, k1, b1), CAbs (_, k2, b2)) => (unifyKinds (k1, k2); unify (d + 1) (b1, b2))
adamc@711 600
adamc@711 601 | (CKAbs (_, b1), CKAbs (_, b2)) => unify d (b1, b2)
adamc@711 602 | (CKApp (c1, k1), CKApp (c2, k2)) => (unify d (c1, c2); unifyKinds (k1, k2))
adamc@711 603 | (TKFun (_, c1), TKFun (_, c2)) => unify d (c1, c2)
adamc@711 604
adamc@711 605 | (CName s1, CName s2) => if s1 = s2 then () else raise Unify
adamc@711 606
adamc@711 607 | (CRecord (k1, xcs1), CRecord (k2, xcs2)) =>
adamc@711 608 (unifyKinds (k1, k2);
adamc@711 609 ListPair.appEq (fn ((x1, c1), (x2, c2)) => (unify d (x1, x2); unify d (c1, c2))) (xcs1, xcs2)
adamc@711 610 handle ListPair.UnequalLengths => raise Unify)
adamc@711 611 | (CConcat (f1, x1), CConcat (f2, x2)) => (unify d (f1, f2); unify d (x1, x2))
adamc@711 612 | (CMap (d1, r1), CMap (d2, r2)) => (unifyKinds (d1, d2); unifyKinds (r1, r2))
adamc@711 613
adamc@711 614 | (CUnit, CUnit) => ()
adamc@711 615
adamc@711 616 | (CTuple cs1, CTuple cs2) => (ListPair.appEq (unify d) (cs1, cs2)
adamc@711 617 handle ListPair.UnequalLengths => raise Unify)
adamc@711 618 | (CProj (c1, n1), CProj (c2, n2)) => (unify d (c1, c2);
adamc@711 619 if n1 = n2 then () else raise Unify)
adamc@711 620
adamc@711 621 | _ => raise Unify
adamc@674 622 in
adamc@711 623 unify
adamc@674 624 end
adamc@674 625
adam@1325 626 fun tryUnify hnorm nRs (c1, c2) =
adamc@674 627 let
adamc@711 628 val rs = List.tabulate (nRs, fn _ => ref NONE)
adamc@674 629 in
adam@1325 630 (unifyCons hnorm rs 0 (c1, c2);
adamc@711 631 SOME (map (fn r => case !r of
adamc@711 632 NONE => raise Unify
adamc@711 633 | SOME c => c) rs))
adamc@711 634 handle Unify => NONE
adamc@674 635 end
adamc@674 636
adamc@711 637 fun unifySubst (rs : con list) =
adamc@711 638 U.Con.mapB {kind = fn _ => fn k => k,
adamc@711 639 con = fn d => fn c =>
adamc@711 640 case c of
adamc@711 641 CRel n =>
adamc@711 642 if n < d then
adamc@711 643 c
adamc@711 644 else
adamc@711 645 #1 (List.nth (rs, n - d))
adamc@711 646 | _ => c,
adamc@711 647 bind = fn (d, U.Con.RelC _) => d + 1
adamc@711 648 | (d, _) => d}
adamc@711 649 0
adamc@711 650
adamc@753 651 exception Bad of con * con
adamc@750 652
adamc@754 653 val hasUnif = U.Con.exists {kind = fn _ => false,
adam@1303 654 con = fn CUnif (_, _, _, _, ref NONE) => true
adamc@754 655 | _ => false}
adamc@754 656
adamc@754 657 fun startsWithUnif c =
adamc@754 658 let
adamc@754 659 fun firstArg (c, acc) =
adamc@754 660 case #1 c of
adamc@754 661 CApp (f, x) => firstArg (f, SOME x)
adamc@754 662 | _ => acc
adamc@754 663 in
adamc@754 664 case firstArg (c, NONE) of
adamc@754 665 NONE => false
adamc@754 666 | SOME x => hasUnif x
adamc@754 667 end
adamc@754 668
adamc@753 669 fun resolveClass (hnorm : con -> con) (consEq : con * con -> bool) (env : env) =
adamc@674 670 let
adamc@711 671 fun resolve c =
adamc@711 672 let
adamc@711 673 fun doHead f =
adamc@711 674 case CM.find (#classes env, f) of
adamc@711 675 NONE => NONE
adamc@711 676 | SOME class =>
adamc@711 677 let
adamc@711 678 val loc = #2 c
adamc@675 679
adamc@753 680 fun generalize (c as (_, loc)) =
adamc@753 681 case #1 c of
adamc@753 682 CApp (f, x) =>
adamc@753 683 let
adamc@753 684 val (f, equate) = generalize f
adamc@753 685
adamc@753 686 fun isRecord () =
adamc@753 687 let
adamc@753 688 val rk = ref NONE
adamc@753 689 val k = (KUnif (loc, "k", rk), loc)
adamc@753 690 val r = ref NONE
adam@1303 691 val rc = (CUnif (0, loc, k, "x", r), loc)
adamc@753 692 in
adamc@753 693 ((CApp (f, rc), loc),
adamc@753 694 fn () => (if consEq (rc, x) then
adamc@753 695 true
adamc@753 696 else
adamc@753 697 (raise Bad (rc, x);
adamc@753 698 false))
adamc@753 699 andalso equate ())
adamc@753 700 end
adamc@753 701 in
adamc@753 702 case #1 x of
adamc@753 703 CConcat _ => isRecord ()
adamc@753 704 | CRecord _ => isRecord ()
adamc@753 705 | _ => ((CApp (f, x), loc), equate)
adamc@753 706 end
adamc@753 707 | _ => (c, fn () => true)
adamc@753 708
adamc@753 709 val (c, equate) = generalize c
adamc@753 710
adamc@711 711 fun tryRules rules =
adamc@711 712 case rules of
adamc@675 713 [] => NONE
adamc@711 714 | (nRs, cs, c', e) :: rules' =>
adam@1325 715 case tryUnify hnorm nRs (c, c') of
adamc@711 716 NONE => tryRules rules'
adamc@711 717 | SOME rs =>
adamc@675 718 let
adamc@711 719 val eos = map (resolve o unifySubst rs) cs
adamc@675 720 in
adamc@750 721 if List.exists (not o Option.isSome) eos
adamc@753 722 orelse not (equate ())
adamc@753 723 orelse not (consEq (c, unifySubst rs c')) then
adamc@711 724 tryRules rules'
adamc@711 725 else
adamc@711 726 let
adamc@711 727 val es = List.mapPartial (fn x => x) eos
adamc@711 728
adamc@711 729 val e = foldr (fn (c, e) => (ECApp (e, c), loc)) e rs
adamc@711 730 val e = foldl (fn (e', e) => (EApp (e, e'), loc)) e es
adamc@711 731 in
adamc@711 732 SOME e
adamc@711 733 end
adamc@675 734 end
adamc@711 735
adamc@711 736 fun rules () = tryRules (#rules class)
adamc@711 737
adamc@711 738 fun tryGrounds ces =
adamc@711 739 case ces of
adamc@711 740 [] => rules ()
adamc@711 741 | (c', e) :: ces' =>
adam@1325 742 case tryUnify hnorm 0 (c, c') of
adamc@711 743 NONE => tryGrounds ces'
adamc@711 744 | SOME _ => SOME e
adamc@675 745 in
adamc@711 746 tryGrounds (#ground class)
adamc@675 747 end
adamc@711 748 in
adamc@754 749 if startsWithUnif c then
adamc@754 750 NONE
adamc@754 751 else
adamc@754 752 case #1 c of
adamc@754 753 TRecord c =>
adamc@754 754 (case #1 (hnorm c) of
adamc@754 755 CRecord (_, xts) =>
adamc@754 756 let
adamc@754 757 fun resolver (xts, acc) =
adamc@754 758 case xts of
adamc@754 759 [] => SOME (ERecord acc, #2 c)
adamc@754 760 | (x, t) :: xts =>
adamc@754 761 let
adamc@754 762 val t = hnorm t
adamc@750 763
adamc@754 764 val t = case t of
adamc@754 765 (CApp (f, x), loc) => (CApp (hnorm f, hnorm x), loc)
adamc@754 766 | _ => t
adamc@754 767 in
adamc@754 768 case resolve t of
adamc@754 769 NONE => NONE
adamc@754 770 | SOME e => resolver (xts, (x, e, t) :: acc)
adamc@754 771 end
adamc@754 772 in
adamc@754 773 resolver (xts, [])
adamc@754 774 end
adamc@754 775 | _ => NONE)
adamc@754 776 | _ =>
adamc@754 777 case class_head_in c of
adamc@754 778 SOME f => doHead f
adamc@754 779 | _ => NONE
adamc@711 780 end
adamc@674 781 in
adamc@711 782 resolve
adamc@674 783 end
adamc@211 784
adamc@9 785 fun pushERel (env : env) x t =
adamc@9 786 let
adamc@9 787 val renameE = SM.map (fn Rel' (n, t) => Rel' (n+1, t)
adamc@9 788 | x => x) (#renameE env)
adamc@211 789
adamc@675 790 val classes = CM.map (fn class =>
adamc@711 791 {ground = map (fn (c, e) => (c, liftExp e)) (#ground class),
adamc@711 792 rules = #rules class}) (#classes env)
adamc@711 793 val classes = case class_head_in t of
adamc@211 794 NONE => classes
adamc@711 795 | SOME f =>
adamc@403 796 case CM.find (classes, f) of
adamc@403 797 NONE => classes
adamc@403 798 | SOME class =>
adamc@403 799 let
adamc@711 800 val class = {ground = (t, (ERel 0, #2 t)) :: #ground class,
adamc@711 801 rules = #rules class}
adamc@403 802 in
adamc@403 803 CM.insert (classes, f, class)
adamc@403 804 end
adamc@9 805 in
adamc@623 806 {renameK = #renameK env,
adamc@623 807 relK = #relK env,
adamc@623 808
adamc@623 809 renameC = #renameC env,
adamc@9 810 relC = #relC env,
adamc@9 811 namedC = #namedC env,
adamc@9 812
adamc@157 813 datatypes = #datatypes env,
adamc@171 814 constructors = #constructors env,
adamc@157 815
adamc@211 816 classes = classes,
adamc@211 817
adamc@9 818 renameE = SM.insert (renameE, x, Rel' (0, t)),
adamc@9 819 relE = (x, t) :: #relE env,
adamc@31 820 namedE = #namedE env,
adamc@31 821
adamc@31 822 renameSgn = #renameSgn env,
adamc@31 823 sgn = #sgn env,
adamc@31 824
adamc@31 825 renameStr = #renameStr env,
adamc@31 826 str = #str env}
adamc@9 827 end
adamc@9 828
adamc@9 829 fun lookupERel (env : env) n =
adamc@9 830 (List.nth (#relE env, n))
adamc@9 831 handle Subscript => raise UnboundRel n
adamc@9 832
adamc@674 833 fun rule_in c =
adamc@674 834 let
adamc@674 835 fun quantifiers (c, nvars) =
adamc@674 836 case #1 c of
adamc@674 837 TCFun (_, _, _, c) => quantifiers (c, nvars + 1)
adamc@674 838 | _ =>
adamc@674 839 let
adamc@674 840 fun clauses (c, hyps) =
adamc@674 841 case #1 c of
adamc@674 842 TFun (hyp, c) =>
adamc@711 843 (case class_head_in hyp of
adamc@711 844 SOME _ => clauses (c, hyp :: hyps)
adamc@711 845 | NONE => NONE)
adamc@674 846 | _ =>
adamc@711 847 case class_head_in c of
adamc@674 848 NONE => NONE
adamc@711 849 | SOME f => SOME (f, nvars, rev hyps, c)
adamc@674 850 in
adamc@674 851 clauses (c, [])
adamc@674 852 end
adamc@674 853 in
adamc@711 854 quantifiers (c, 0)
adamc@677 855 end
adamc@677 856
adamc@9 857 fun pushENamedAs (env : env) x n t =
adamc@211 858 let
adamc@211 859 val classes = #classes env
adamc@674 860 val classes = case rule_in t of
adamc@211 861 NONE => classes
adamc@711 862 | SOME (f, nvs, cs, c) =>
adamc@403 863 case CM.find (classes, f) of
adamc@403 864 NONE => classes
adamc@403 865 | SOME class =>
adamc@403 866 let
adamc@675 867 val e = (ENamed n, #2 t)
adamc@675 868
adamc@675 869 val class =
adamc@711 870 {ground = #ground class,
adamc@711 871 rules = (nvs, cs, c, e) :: #rules class}
adamc@403 872 in
adamc@403 873 CM.insert (classes, f, class)
adamc@403 874 end
adamc@211 875 in
adamc@623 876 {renameK = #renameK env,
adamc@623 877 relK = #relK env,
adamc@623 878
adamc@623 879 renameC = #renameC env,
adamc@211 880 relC = #relC env,
adamc@211 881 namedC = #namedC env,
adamc@9 882
adamc@211 883 datatypes = #datatypes env,
adamc@211 884 constructors = #constructors env,
adamc@157 885
adamc@211 886 classes = classes,
adamc@31 887
adamc@211 888 renameE = SM.insert (#renameE env, x, Named' (n, t)),
adamc@211 889 relE = #relE env,
adamc@211 890 namedE = IM.insert (#namedE env, n, (x, t)),
adamc@211 891
adamc@211 892 renameSgn = #renameSgn env,
adamc@211 893 sgn = #sgn env,
adamc@211 894
adamc@211 895 renameStr = #renameStr env,
adamc@211 896 str = #str env}
adamc@211 897 end
adamc@9 898
adamc@9 899 fun pushENamed env x t =
adamc@9 900 let
adamc@9 901 val n = !namedCounter
adamc@9 902 in
adamc@9 903 namedCounter := n + 1;
adamc@9 904 (pushENamedAs env x n t, n)
adamc@9 905 end
adamc@9 906
adamc@9 907 fun lookupENamed (env : env) n =
adamc@9 908 case IM.find (#namedE env, n) of
adamc@9 909 NONE => raise UnboundNamed n
adamc@9 910 | SOME x => x
adamc@9 911
adamc@471 912 fun checkENamed (env : env) n =
adamc@471 913 Option.isSome (IM.find (#namedE env, n))
adamc@471 914
adamc@9 915 fun lookupE (env : env) x =
adamc@9 916 case SM.find (#renameE env, x) of
adamc@9 917 NONE => NotBound
adamc@9 918 | SOME (Rel' x) => Rel x
adamc@9 919 | SOME (Named' x) => Named x
adamc@2 920
adamc@31 921 fun pushSgnNamedAs (env : env) x n sgis =
adamc@623 922 {renameK = #renameK env,
adamc@623 923 relK = #relK env,
adamc@623 924
adamc@623 925 renameC = #renameC env,
adamc@31 926 relC = #relC env,
adamc@31 927 namedC = #namedC env,
adamc@31 928
adamc@157 929 datatypes = #datatypes env,
adamc@171 930 constructors = #constructors env,
adamc@157 931
adamc@211 932 classes = #classes env,
adamc@211 933
adamc@31 934 renameE = #renameE env,
adamc@31 935 relE = #relE env,
adamc@31 936 namedE = #namedE env,
adamc@31 937
adamc@31 938 renameSgn = SM.insert (#renameSgn env, x, (n, sgis)),
adamc@31 939 sgn = IM.insert (#sgn env, n, (x, sgis)),
adamc@31 940
adamc@31 941 renameStr = #renameStr env,
adamc@31 942 str = #str env}
adamc@31 943
adamc@31 944 fun pushSgnNamed env x sgis =
adamc@31 945 let
adamc@31 946 val n = !namedCounter
adamc@31 947 in
adamc@31 948 namedCounter := n + 1;
adamc@31 949 (pushSgnNamedAs env x n sgis, n)
adamc@31 950 end
adamc@31 951
adamc@31 952 fun lookupSgnNamed (env : env) n =
adamc@31 953 case IM.find (#sgn env, n) of
adamc@31 954 NONE => raise UnboundNamed n
adamc@31 955 | SOME x => x
adamc@31 956
adamc@31 957 fun lookupSgn (env : env) x = SM.find (#renameSgn env, x)
adamc@31 958
adamc@31 959 fun lookupStrNamed (env : env) n =
adamc@31 960 case IM.find (#str env, n) of
adamc@31 961 NONE => raise UnboundNamed n
adamc@31 962 | SOME x => x
adamc@31 963
adamc@31 964 fun lookupStr (env : env) x = SM.find (#renameStr env, x)
adamc@31 965
adamc@203 966
adamc@216 967 fun sgiSeek (sgi, (sgns, strs, cons)) =
adamc@216 968 case sgi of
adamc@216 969 SgiConAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 970 | SgiCon (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@805 971 | SgiDatatype dts => (sgns, strs, foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts)
adamc@216 972 | SgiDatatypeImp (x, n, _, _, _, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 973 | SgiVal _ => (sgns, strs, cons)
adamc@216 974 | SgiSgn (x, n, _) => (IM.insert (sgns, n, x), strs, cons)
adamc@216 975 | SgiStr (x, n, _) => (sgns, IM.insert (strs, n, x), cons)
adamc@216 976 | SgiConstraint _ => (sgns, strs, cons)
adamc@563 977 | SgiClassAbs (x, n, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@563 978 | SgiClass (x, n, _, _) => (sgns, strs, IM.insert (cons, n, x))
adamc@216 979
adamc@34 980 fun sgnSeek f sgis =
adamc@34 981 let
adamc@59 982 fun seek (sgis, sgns, strs, cons) =
adamc@34 983 case sgis of
adamc@34 984 [] => NONE
adamc@34 985 | (sgi, _) :: sgis =>
adamc@34 986 case f sgi of
adamc@158 987 SOME v =>
adamc@158 988 let
adamc@158 989 val cons =
adamc@158 990 case sgi of
adamc@805 991 SgiDatatype dts => foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts
adamc@191 992 | SgiDatatypeImp (x, n, _, _, _, _, _) => IM.insert (cons, n, x)
adamc@158 993 | _ => cons
adamc@158 994 in
adamc@158 995 SOME (v, (sgns, strs, cons))
adamc@158 996 end
adamc@88 997 | NONE =>
adamc@216 998 let
adamc@216 999 val (sgns, strs, cons) = sgiSeek (sgi, (sgns, strs, cons))
adamc@216 1000 in
adamc@216 1001 seek (sgis, sgns, strs, cons)
adamc@216 1002 end
adamc@34 1003 in
adamc@59 1004 seek (sgis, IM.empty, IM.empty, IM.empty)
adamc@34 1005 end
adamc@34 1006
adamc@34 1007 fun id x = x
adamc@34 1008
adamc@34 1009 fun unravelStr (str, _) =
adamc@34 1010 case str of
adamc@34 1011 StrVar x => (x, [])
adamc@34 1012 | StrProj (str, m) =>
adamc@34 1013 let
adamc@34 1014 val (x, ms) = unravelStr str
adamc@34 1015 in
adamc@34 1016 (x, ms @ [m])
adamc@34 1017 end
adamc@34 1018 | _ => raise Fail "unravelStr"
adamc@34 1019
adamc@59 1020 fun sgnS_con (str, (sgns, strs, cons)) c =
adamc@34 1021 case c of
adamc@34 1022 CModProj (m1, ms, x) =>
adamc@34 1023 (case IM.find (strs, m1) of
adamc@34 1024 NONE => c
adamc@34 1025 | SOME m1x =>
adamc@34 1026 let
adamc@34 1027 val (m1, ms') = unravelStr str
adamc@34 1028 in
adamc@34 1029 CModProj (m1, ms' @ m1x :: ms, x)
adamc@34 1030 end)
adamc@34 1031 | CNamed n =>
adamc@34 1032 (case IM.find (cons, n) of
adamc@34 1033 NONE => c
adamc@34 1034 | SOME nx =>
adamc@34 1035 let
adamc@34 1036 val (m1, ms) = unravelStr str
adamc@34 1037 in
adamc@34 1038 CModProj (m1, ms, nx)
adamc@34 1039 end)
adamc@34 1040 | _ => c
adamc@34 1041
adamc@721 1042 fun sgnS_con' (m1, ms', (sgns, strs, cons)) =
adamc@721 1043 U.Con.map {kind = fn x => x,
adamc@721 1044 con = fn c =>
adamc@721 1045 case c of
adamc@721 1046 CModProj (m1, ms, x) =>
adamc@721 1047 (case IM.find (strs, m1) of
adamc@721 1048 NONE => c
adamc@721 1049 | SOME m1x => CModProj (m1, ms' @ m1x :: ms, x))
adamc@721 1050 | CNamed n =>
adamc@721 1051 (case IM.find (cons, n) of
adamc@721 1052 NONE => c
adamc@721 1053 | SOME nx => CModProj (m1, ms', nx))
adamc@721 1054 | _ => c}
adamc@216 1055
adamc@59 1056 fun sgnS_sgn (str, (sgns, strs, cons)) sgn =
adamc@59 1057 case sgn of
adamc@59 1058 SgnProj (m1, ms, x) =>
adamc@59 1059 (case IM.find (strs, m1) of
adamc@59 1060 NONE => sgn
adamc@59 1061 | SOME m1x =>
adamc@59 1062 let
adamc@59 1063 val (m1, ms') = unravelStr str
adamc@59 1064 in
adamc@59 1065 SgnProj (m1, ms' @ m1x :: ms, x)
adamc@59 1066 end)
adamc@59 1067 | SgnVar n =>
adamc@59 1068 (case IM.find (sgns, n) of
adamc@59 1069 NONE => sgn
adamc@59 1070 | SOME nx =>
adamc@59 1071 let
adamc@59 1072 val (m1, ms) = unravelStr str
adamc@59 1073 in
adamc@59 1074 SgnProj (m1, ms, nx)
adamc@59 1075 end)
adamc@59 1076 | _ => sgn
adamc@59 1077
adamc@59 1078 fun sgnSubSgn x =
adamc@34 1079 ElabUtil.Sgn.map {kind = id,
adamc@59 1080 con = sgnS_con x,
adamc@34 1081 sgn_item = id,
adamc@59 1082 sgn = sgnS_sgn x}
adamc@34 1083
adamc@211 1084
adamc@211 1085
adamc@211 1086 and projectSgn env {sgn, str, field} =
adamc@211 1087 case #1 (hnormSgn env sgn) of
adamc@211 1088 SgnConst sgis =>
adamc@211 1089 (case sgnSeek (fn SgiSgn (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@211 1090 NONE => NONE
adamc@211 1091 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@211 1092 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@211 1093 | _ => NONE
adamc@211 1094
adamc@211 1095 and hnormSgn env (all as (sgn, loc)) =
adamc@34 1096 case sgn of
adamc@42 1097 SgnError => all
adamc@42 1098 | SgnVar n => hnormSgn env (#2 (lookupSgnNamed env n))
adamc@42 1099 | SgnConst _ => all
adamc@42 1100 | SgnFun _ => all
adamc@59 1101 | SgnProj (m, ms, x) =>
adamc@59 1102 let
adamc@59 1103 val (_, sgn) = lookupStrNamed env m
adamc@59 1104 in
adamc@59 1105 case projectSgn env {str = foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms,
adamc@59 1106 sgn = sgn,
adamc@59 1107 field = x} of
adamc@59 1108 NONE => raise Fail "ElabEnv.hnormSgn: projectSgn failed"
adamc@1058 1109 | SOME sgn => hnormSgn env sgn
adamc@59 1110 end
adamc@42 1111 | SgnWhere (sgn, x, c) =>
adamc@42 1112 case #1 (hnormSgn env sgn) of
adamc@42 1113 SgnError => (SgnError, loc)
adamc@42 1114 | SgnConst sgis =>
adamc@42 1115 let
adamc@42 1116 fun traverse (pre, post) =
adamc@42 1117 case post of
adamc@42 1118 [] => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [1]"
adamc@42 1119 | (sgi as (SgiConAbs (x', n, k), loc)) :: rest =>
adamc@42 1120 if x = x' then
adamc@42 1121 List.revAppend (pre, (SgiCon (x', n, k, c), loc) :: rest)
adamc@42 1122 else
adamc@42 1123 traverse (sgi :: pre, rest)
adamc@42 1124 | sgi :: rest => traverse (sgi :: pre, rest)
adamc@42 1125
adamc@42 1126 val sgis = traverse ([], sgis)
adamc@42 1127 in
adamc@42 1128 (SgnConst sgis, loc)
adamc@42 1129 end
adamc@42 1130 | _ => raise Fail "ElabEnv.hnormSgn: Can't reduce 'where' [2]"
adamc@42 1131
adamc@849 1132 fun manifest (m, ms, loc) =
adamc@849 1133 foldl (fn (m, str) => (StrProj (str, m), loc)) (StrVar m, loc) ms
adamc@849 1134
adamc@211 1135 fun enrichClasses env classes (m1, ms) sgn =
adamc@59 1136 case #1 (hnormSgn env sgn) of
adamc@59 1137 SgnConst sgis =>
adamc@211 1138 let
adamc@218 1139 val (classes, _, _, _) =
adamc@218 1140 foldl (fn (sgi, (classes, newClasses, fmap, env)) =>
adamc@211 1141 let
adamc@211 1142 fun found (x, n) =
adamc@211 1143 (CM.insert (classes,
adamc@211 1144 ClProj (m1, ms, x),
adamc@211 1145 empty_class),
adamc@216 1146 IM.insert (newClasses, n, x),
adamc@218 1147 sgiSeek (#1 sgi, fmap),
adamc@218 1148 env)
adamc@216 1149
adamc@218 1150 fun default () = (classes, newClasses, sgiSeek (#1 sgi, fmap), env)
adamc@211 1151 in
adamc@211 1152 case #1 sgi of
adamc@217 1153 SgiStr (x, _, sgn) =>
adamc@849 1154 let
adamc@849 1155 val str = manifest (m1, ms, #2 sgi)
adamc@849 1156 val sgn' = sgnSubSgn (str, fmap) sgn
adamc@849 1157 in
adamc@849 1158 (enrichClasses env classes (m1, ms @ [x]) sgn',
adamc@849 1159 newClasses,
adamc@849 1160 sgiSeek (#1 sgi, fmap),
adamc@849 1161 env)
adamc@849 1162 end
adamc@218 1163 | SgiSgn (x, n, sgn) =>
adamc@218 1164 (classes,
adamc@218 1165 newClasses,
adamc@218 1166 fmap,
adamc@218 1167 pushSgnNamedAs env x n sgn)
adamc@218 1168
adamc@563 1169 | SgiClassAbs (x, n, _) => found (x, n)
adamc@563 1170 | SgiClass (x, n, _, _) => found (x, n)
adamc@674 1171 | SgiVal (x, n, c) =>
adamc@674 1172 (case rule_in c of
adamc@674 1173 NONE => default ()
adamc@711 1174 | SOME (cn, nvs, cs, c) =>
adamc@674 1175 let
adamc@711 1176 val loc = #2 c
adamc@721 1177 val globalize = sgnS_con' (m1, ms, fmap)
adamc@674 1178
adamc@674 1179 val nc =
adamc@674 1180 case cn of
adamc@674 1181 ClNamed f => IM.find (newClasses, f)
adamc@674 1182 | _ => NONE
adamc@674 1183 in
adamc@674 1184 case nc of
adamc@674 1185 NONE =>
adamc@419 1186 let
adamc@419 1187 val classes =
adamc@419 1188 case CM.find (classes, cn) of
adamc@419 1189 NONE => classes
adamc@419 1190 | SOME class =>
adamc@419 1191 let
adamc@711 1192 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1193
adamc@675 1194 val class =
adamc@711 1195 {ground = #ground class,
adamc@711 1196 rules = (nvs,
adamc@711 1197 map globalize cs,
adamc@711 1198 globalize c,
adamc@711 1199 e) :: #rules class}
adamc@419 1200 in
adamc@419 1201 CM.insert (classes, cn, class)
adamc@419 1202 end
adamc@419 1203 in
adamc@419 1204 (classes,
adamc@419 1205 newClasses,
adamc@419 1206 fmap,
adamc@419 1207 env)
adamc@419 1208 end
adamc@674 1209 | SOME fx =>
adamc@674 1210 let
adamc@674 1211 val cn = ClProj (m1, ms, fx)
adamc@419 1212
adamc@674 1213 val classes =
adamc@674 1214 case CM.find (classes, cn) of
adamc@674 1215 NONE => classes
adamc@674 1216 | SOME class =>
adamc@674 1217 let
adamc@675 1218 val e = (EModProj (m1, ms, x), #2 sgn)
adamc@675 1219
adamc@675 1220 val class =
adamc@711 1221 {ground = #ground class,
adamc@711 1222 rules = (nvs,
adamc@711 1223 map globalize cs,
adamc@711 1224 globalize c,
adamc@711 1225 e) :: #rules class}
adamc@674 1226 in
adamc@674 1227 CM.insert (classes, cn, class)
adamc@674 1228 end
adamc@674 1229 in
adamc@674 1230 (classes,
adamc@674 1231 newClasses,
adamc@674 1232 fmap,
adamc@674 1233 env)
adamc@674 1234 end
adamc@674 1235 end)
adamc@216 1236 | _ => default ()
adamc@211 1237 end)
adamc@218 1238 (classes, IM.empty, (IM.empty, IM.empty, IM.empty), env) sgis
adamc@211 1239 in
adamc@211 1240 classes
adamc@211 1241 end
adamc@211 1242 | _ => classes
adamc@211 1243
adamc@211 1244 fun pushStrNamedAs (env : env) x n sgn =
adamc@623 1245 {renameK = #renameK env,
adamc@623 1246 relK = #relK env,
adamc@623 1247
adamc@623 1248 renameC = #renameC env,
adamc@211 1249 relC = #relC env,
adamc@211 1250 namedC = #namedC env,
adamc@211 1251
adamc@211 1252 datatypes = #datatypes env,
adamc@211 1253 constructors = #constructors env,
adamc@211 1254
adamc@211 1255 classes = enrichClasses env (#classes env) (n, []) sgn,
adamc@211 1256
adamc@211 1257 renameE = #renameE env,
adamc@211 1258 relE = #relE env,
adamc@211 1259 namedE = #namedE env,
adamc@211 1260
adamc@211 1261 renameSgn = #renameSgn env,
adamc@211 1262 sgn = #sgn env,
adamc@211 1263
adamc@211 1264 renameStr = SM.insert (#renameStr env, x, (n, sgn)),
adamc@211 1265 str = IM.insert (#str env, n, (x, sgn))}
adamc@211 1266
adamc@211 1267 fun pushStrNamed env x sgn =
adamc@211 1268 let
adamc@211 1269 val n = !namedCounter
adamc@211 1270 in
adamc@211 1271 namedCounter := n + 1;
adamc@211 1272 (pushStrNamedAs env x n sgn, n)
adamc@211 1273 end
adamc@211 1274
adamc@211 1275 fun sgiBinds env (sgi, loc) =
adamc@211 1276 case sgi of
adamc@211 1277 SgiConAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@211 1278 | SgiCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@805 1279 | SgiDatatype dts =>
adamc@211 1280 let
adamc@805 1281 fun doOne ((x, n, xs, xncs), env) =
adamc@805 1282 let
adamc@805 1283 val k = (KType, loc)
adamc@805 1284 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1285
adamc@805 1286 val env = pushCNamedAs env x n k' NONE
adamc@805 1287 in
adamc@805 1288 foldl (fn ((x', n', to), env) =>
adamc@805 1289 let
adamc@805 1290 val t =
adamc@805 1291 case to of
adamc@805 1292 NONE => (CNamed n, loc)
adamc@805 1293 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@805 1294
adamc@805 1295 val k = (KType, loc)
adamc@805 1296 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@805 1297 in
adamc@805 1298 pushENamedAs env x' n' t
adamc@805 1299 end)
adamc@805 1300 env xncs
adamc@805 1301 end
adamc@211 1302 in
adamc@805 1303 foldl doOne env dts
adamc@211 1304 end
adamc@211 1305 | SgiDatatypeImp (x, n, m1, ms, x', xs, xncs) =>
adamc@211 1306 let
adamc@341 1307 val k = (KType, loc)
adamc@341 1308 val k' = foldr (fn (_, k') => (KArrow (k, k'), loc)) k xs
adamc@341 1309
adamc@341 1310 val env = pushCNamedAs env x n k' (SOME (CModProj (m1, ms, x'), loc))
adamc@211 1311 in
adamc@211 1312 foldl (fn ((x', n', to), env) =>
adamc@211 1313 let
adamc@211 1314 val t =
adamc@211 1315 case to of
adamc@211 1316 NONE => (CNamed n, loc)
adamc@211 1317 | SOME t => (TFun (t, (CNamed n, loc)), loc)
adamc@211 1318
adamc@211 1319 val k = (KType, loc)
adamc@211 1320 val t = foldr (fn (x, t) => (TCFun (Explicit, x, k, t), loc)) t xs
adamc@211 1321 in
adamc@211 1322 pushENamedAs env x' n' t
adamc@211 1323 end)
adamc@211 1324 env xncs
adamc@211 1325 end
adamc@211 1326 | SgiVal (x, n, t) => pushENamedAs env x n t
adamc@211 1327 | SgiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@211 1328 | SgiSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@211 1329 | SgiConstraint _ => env
adamc@211 1330
adamc@711 1331 | SgiClassAbs (x, n, k) => pushCNamedAs env x n k NONE
adamc@711 1332 | SgiClass (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@459 1333
adamc@211 1334 fun sgnSubCon x =
adamc@211 1335 ElabUtil.Con.map {kind = id,
adamc@211 1336 con = sgnS_con x}
adamc@59 1337
adamc@59 1338 fun projectStr env {sgn, str, field} =
adamc@59 1339 case #1 (hnormSgn env sgn) of
adamc@59 1340 SgnConst sgis =>
adamc@59 1341 (case sgnSeek (fn SgiStr (x, _, sgn) => if x = field then SOME sgn else NONE | _ => NONE) sgis of
adamc@59 1342 NONE => NONE
adamc@59 1343 | SOME (sgn, subs) => SOME (sgnSubSgn (str, subs) sgn))
adamc@59 1344 | SgnError => SOME (SgnError, ErrorMsg.dummySpan)
adamc@59 1345 | _ => NONE
adamc@59 1346
adamc@158 1347 fun chaseMpath env (n, ms) =
adamc@158 1348 let
adamc@158 1349 val (_, sgn) = lookupStrNamed env n
adamc@158 1350 in
adamc@158 1351 foldl (fn (m, (str, sgn)) =>
adamc@158 1352 case projectStr env {sgn = sgn, str = str, field = m} of
adamc@158 1353 NONE => raise Fail "kindof: Unknown substructure"
adamc@158 1354 | SOME sgn => ((StrProj (str, m), #2 sgn), sgn))
adamc@158 1355 ((StrVar n, #2 sgn), sgn) ms
adamc@158 1356 end
adamc@158 1357
adamc@42 1358 fun projectCon env {sgn, str, field} =
adamc@42 1359 case #1 (hnormSgn env sgn) of
adamc@34 1360 SgnConst sgis =>
adamc@34 1361 (case sgnSeek (fn SgiConAbs (x, _, k) => if x = field then SOME (k, NONE) else NONE
adamc@34 1362 | SgiCon (x, _, k, c) => if x = field then SOME (k, SOME c) else NONE
adamc@805 1363 | SgiDatatype dts =>
adamc@805 1364 (case List.find (fn (x, _, xs, _) => x = field) dts of
adamc@805 1365 SOME (_, _, xs, _) =>
adamc@805 1366 let
adamc@805 1367 val k = (KType, #2 sgn)
adamc@805 1368 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@805 1369 in
adamc@805 1370 SOME (k', NONE)
adamc@805 1371 end
adamc@805 1372 | NONE => NONE)
adamc@341 1373 | SgiDatatypeImp (x, _, m1, ms, x', xs, _) =>
adamc@341 1374 if x = field then
adamc@341 1375 let
adamc@341 1376 val k = (KType, #2 sgn)
adamc@341 1377 val k' = foldl (fn (_, k') => (KArrow (k, k'), #2 sgn)) k xs
adamc@341 1378 in
adamc@341 1379 SOME (k', SOME (CModProj (m1, ms, x'), #2 sgn))
adamc@341 1380 end
adamc@158 1381 else
adamc@158 1382 NONE
adamc@563 1383 | SgiClassAbs (x, _, k) => if x = field then
adamc@563 1384 SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), NONE)
adamc@563 1385 else
adamc@563 1386 NONE
adamc@563 1387 | SgiClass (x, _, k, c) => if x = field then
adamc@563 1388 SOME ((KArrow (k, (KType, #2 sgn)), #2 sgn), SOME c)
adamc@563 1389 else
adamc@563 1390 NONE
adamc@34 1391 | _ => NONE) sgis of
adamc@34 1392 NONE => NONE
adamc@34 1393 | SOME ((k, co), subs) => SOME (k, Option.map (sgnSubCon (str, subs)) co))
adamc@34 1394 | SgnError => SOME ((KError, ErrorMsg.dummySpan), SOME (CError, ErrorMsg.dummySpan))
adamc@42 1395 | _ => NONE
adamc@34 1396
adamc@157 1397 fun projectDatatype env {sgn, str, field} =
adamc@157 1398 case #1 (hnormSgn env sgn) of
adamc@157 1399 SgnConst sgis =>
adamc@805 1400 (case sgnSeek (fn SgiDatatype dts =>
adamc@805 1401 (case List.find (fn (x, _, _, _) => x = field) dts of
adamc@805 1402 SOME (_, _, xs, xncs) => SOME (xs, xncs)
adamc@805 1403 | NONE => NONE)
adamc@191 1404 | SgiDatatypeImp (x, _, _, _, _, xs, xncs) => if x = field then SOME (xs, xncs) else NONE
adamc@157 1405 | _ => NONE) sgis of
adamc@157 1406 NONE => NONE
adamc@191 1407 | SOME ((xs, xncs), subs) => SOME (xs,
adamc@191 1408 map (fn (x, n, to) => (x, n, Option.map (sgnSubCon (str, subs)) to)) xncs))
adamc@157 1409 | _ => NONE
adamc@157 1410
adamc@174 1411 fun projectConstructor env {sgn, str, field} =
adamc@174 1412 case #1 (hnormSgn env sgn) of
adamc@174 1413 SgnConst sgis =>
adamc@174 1414 let
adamc@191 1415 fun consider (n, xs, xncs) =
adamc@174 1416 ListUtil.search (fn (x, n', to) =>
adamc@174 1417 if x <> field then
adamc@174 1418 NONE
adamc@174 1419 else
adamc@191 1420 SOME (U.classifyDatatype xncs, n', xs, to, (CNamed n, #2 str))) xncs
adamc@174 1421 in
adamc@805 1422 case sgnSeek (fn SgiDatatype dts =>
adamc@805 1423 let
adamc@805 1424 fun search dts =
adamc@805 1425 case dts of
adamc@805 1426 [] => NONE
adamc@805 1427 | (_, n, xs, xncs) :: dts =>
adamc@805 1428 case consider (n, xs, xncs) of
adamc@805 1429 NONE => search dts
adamc@805 1430 | v => v
adamc@805 1431 in
adamc@805 1432 search dts
adamc@805 1433 end
adamc@191 1434 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => consider (n, xs, xncs)
adamc@174 1435 | _ => NONE) sgis of
adamc@174 1436 NONE => NONE
adamc@191 1437 | SOME ((dk, n, xs, to, t), subs) => SOME (dk, n, xs, Option.map (sgnSubCon (str, subs)) to,
adamc@191 1438 sgnSubCon (str, subs) t)
adamc@174 1439 end
adamc@174 1440 | _ => NONE
adamc@174 1441
adamc@42 1442 fun projectVal env {sgn, str, field} =
adamc@42 1443 case #1 (hnormSgn env sgn) of
adamc@34 1444 SgnConst sgis =>
adamc@162 1445 let
adamc@191 1446 fun seek (n, xs, xncs) =
adamc@162 1447 ListUtil.search (fn (x, _, to) =>
adamc@162 1448 if x = field then
adamc@191 1449 SOME (let
adamc@467 1450 val base = (CNamed n, #2 sgn)
adamc@467 1451 val nxs = length xs
adamc@467 1452 val base = ListUtil.foldli (fn (i, _, base) =>
adamc@467 1453 (CApp (base,
adamc@467 1454 (CRel (nxs - i - 1), #2 sgn)),
adamc@467 1455 #2 sgn))
adamc@467 1456 base xs
adamc@467 1457
adamc@191 1458 val t =
adamc@191 1459 case to of
adamc@467 1460 NONE => base
adamc@467 1461 | SOME t => (TFun (t, base), #2 sgn)
adamc@191 1462 val k = (KType, #2 sgn)
adamc@191 1463 in
adamc@467 1464 foldr (fn (x, t) => (TCFun (Implicit, x, k, t), #2 sgn))
adamc@191 1465 t xs
adamc@191 1466 end)
adamc@162 1467 else
adamc@162 1468 NONE) xncs
adamc@162 1469 in
adamc@162 1470 case sgnSeek (fn SgiVal (x, _, c) => if x = field then SOME c else NONE
adamc@805 1471 | SgiDatatype dts =>
adamc@805 1472 let
adamc@805 1473 fun search dts =
adamc@805 1474 case dts of
adamc@805 1475 [] => NONE
adamc@805 1476 | (_, n, xs, xncs) :: dts =>
adamc@805 1477 case seek (n, xs, xncs) of
adamc@805 1478 NONE => search dts
adamc@805 1479 | v => v
adamc@805 1480 in
adamc@805 1481 search dts
adamc@805 1482 end
adamc@191 1483 | SgiDatatypeImp (_, n, _, _, _, xs, xncs) => seek (n, xs, xncs)
adamc@162 1484 | _ => NONE) sgis of
adamc@162 1485 NONE => NONE
adamc@162 1486 | SOME (c, subs) => SOME (sgnSubCon (str, subs) c)
adamc@162 1487 end
adamc@34 1488 | SgnError => SOME (CError, ErrorMsg.dummySpan)
adamc@42 1489 | _ => NONE
adamc@34 1490
adamc@88 1491 fun sgnSeekConstraints (str, sgis) =
adamc@88 1492 let
adamc@88 1493 fun seek (sgis, sgns, strs, cons, acc) =
adamc@88 1494 case sgis of
adamc@88 1495 [] => acc
adamc@88 1496 | (sgi, _) :: sgis =>
adamc@88 1497 case sgi of
adamc@88 1498 SgiConstraint (c1, c2) =>
adamc@88 1499 let
adamc@88 1500 val sub = sgnSubCon (str, (sgns, strs, cons))
adamc@88 1501 in
adamc@88 1502 seek (sgis, sgns, strs, cons, (sub c1, sub c2) :: acc)
adamc@88 1503 end
adamc@88 1504 | SgiConAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1505 | SgiCon (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@805 1506 | SgiDatatype dts => seek (sgis, sgns, strs,
adamc@805 1507 foldl (fn ((x, n, _, _), cons) => IM.insert (cons, n, x)) cons dts, acc)
adamc@191 1508 | SgiDatatypeImp (x, n, _, _, _, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1509 | SgiVal _ => seek (sgis, sgns, strs, cons, acc)
adamc@88 1510 | SgiSgn (x, n, _) => seek (sgis, IM.insert (sgns, n, x), strs, cons, acc)
adamc@88 1511 | SgiStr (x, n, _) => seek (sgis, sgns, IM.insert (strs, n, x), cons, acc)
adamc@563 1512 | SgiClassAbs (x, n, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@563 1513 | SgiClass (x, n, _, _) => seek (sgis, sgns, strs, IM.insert (cons, n, x), acc)
adamc@88 1514 in
adamc@88 1515 seek (sgis, IM.empty, IM.empty, IM.empty, [])
adamc@88 1516 end
adamc@88 1517
adamc@88 1518 fun projectConstraints env {sgn, str} =
adamc@88 1519 case #1 (hnormSgn env sgn) of
adamc@88 1520 SgnConst sgis => SOME (sgnSeekConstraints (str, sgis))
adamc@88 1521 | SgnError => SOME []
adamc@88 1522 | _ => NONE
adamc@34 1523
adamc@825 1524 fun patBinds env (p, loc) =
adamc@825 1525 case p of
adamc@825 1526 PWild => env
adamc@825 1527 | PVar (x, t) => pushERel env x t
adamc@825 1528 | PPrim _ => env
adamc@825 1529 | PCon (_, _, _, NONE) => env
adamc@825 1530 | PCon (_, _, _, SOME p) => patBinds env p
adamc@825 1531 | PRecord xps => foldl (fn ((_, p, _), env) => patBinds env p) env xps
adamc@825 1532
adamc@1272 1533 fun patBindsN (p, _) =
adamc@1272 1534 case p of
adamc@1272 1535 PWild => 0
adamc@1272 1536 | PVar _ => 1
adamc@1272 1537 | PPrim _ => 0
adamc@1272 1538 | PCon (_, _, _, NONE) => 0
adamc@1272 1539 | PCon (_, _, _, SOME p) => patBindsN p
adamc@1272 1540 | PRecord xps => foldl (fn ((_, p, _), n) => patBindsN p + n) 0 xps
adamc@1272 1541
adamc@447 1542 fun edeclBinds env (d, loc) =
adamc@447 1543 case d of
adamc@825 1544 EDVal (p, _, _) => patBinds env p
adamc@447 1545 | EDValRec vis => foldl (fn ((x, t, _), env) => pushERel env x t) env vis
adamc@447 1546
adamc@157 1547 fun declBinds env (d, loc) =
adamc@157 1548 case d of
adamc@157 1549 DCon (x, n, k, c) => pushCNamedAs env x n k (SOME c)
adamc@805 1550 | DDatatype dts =>
adamc@157 1551 let
adamc@805 1552 fun doOne ((x, n, xs, xncs), env) =
adamc@805 1553 let
adamc@805 1554 val k = (KType, loc)
adamc@805 1555 val nxs = length xs
adamc@805 1556 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@805 1557 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@805 1558 (KArrow (k, kb), loc)))
adamc@805 1559 ((CNamed n, loc), k) xs
adamc@805 1560
adamc@805 1561 val env = pushCNamedAs env x n kb NONE
adamc@805 1562 val env = pushDatatype env n xs xncs
adamc@805 1563 in
adamc@805 1564 foldl (fn ((x', n', to), env) =>
adamc@805 1565 let
adamc@805 1566 val t =
adamc@805 1567 case to of
adamc@805 1568 NONE => tb
adamc@805 1569 | SOME t => (TFun (t, tb), loc)
adamc@805 1570 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@805 1571 in
adamc@805 1572 pushENamedAs env x' n' t
adamc@805 1573 end)
adamc@805 1574 env xncs
adamc@805 1575 end
adamc@157 1576 in
adamc@805 1577 foldl doOne env dts
adamc@157 1578 end
adamc@191 1579 | DDatatypeImp (x, n, m, ms, x', xs, xncs) =>
adamc@157 1580 let
adamc@157 1581 val t = (CModProj (m, ms, x'), loc)
adamc@297 1582 val k = (KType, loc)
adamc@297 1583 val nxs = length xs
adamc@297 1584 val (tb, kb) = ListUtil.foldli (fn (i, x', (tb, kb)) =>
adamc@297 1585 ((CApp (tb, (CRel (nxs - i - 1), loc)), loc),
adamc@297 1586 (KArrow (k, kb), loc)))
adamc@297 1587 ((CNamed n, loc), k) xs
adamc@297 1588
adamc@341 1589 val env = pushCNamedAs env x n kb (SOME t)
adamc@191 1590 val env = pushDatatype env n xs xncs
adamc@157 1591 in
adamc@191 1592 foldl (fn ((x', n', to), env) =>
adamc@191 1593 let
adamc@191 1594 val t =
adamc@191 1595 case to of
adamc@297 1596 NONE => tb
adamc@297 1597 | SOME t => (TFun (t, tb), loc)
adamc@297 1598 val t = foldr (fn (x, t) => (TCFun (Implicit, x, k, t), loc)) t xs
adamc@191 1599 in
adamc@191 1600 pushENamedAs env x' n' t
adamc@191 1601 end)
adamc@191 1602 env xncs
adamc@157 1603 end
adamc@157 1604 | DVal (x, n, t, _) => pushENamedAs env x n t
adamc@157 1605 | DValRec vis => foldl (fn ((x, n, t, _), env) => pushENamedAs env x n t) env vis
adamc@157 1606 | DSgn (x, n, sgn) => pushSgnNamedAs env x n sgn
adamc@157 1607 | DStr (x, n, sgn, _) => pushStrNamedAs env x n sgn
adamc@157 1608 | DFfiStr (x, n, sgn) => pushStrNamedAs env x n sgn
adamc@157 1609 | DConstraint _ => env
adamc@157 1610 | DExport _ => env
adamc@707 1611 | DTable (tn, x, n, c, _, pc, _, cc) =>
adamc@205 1612 let
adamc@705 1613 val ct = (CModProj (tn, [], "sql_table"), loc)
adamc@705 1614 val ct = (CApp (ct, c), loc)
adamc@707 1615 val ct = (CApp (ct, (CConcat (pc, cc), loc)), loc)
adamc@338 1616 in
adamc@705 1617 pushENamedAs env x n ct
adamc@338 1618 end
adamc@338 1619 | DSequence (tn, x, n) =>
adamc@338 1620 let
adamc@338 1621 val t = (CModProj (tn, [], "sql_sequence"), loc)
adamc@205 1622 in
adamc@205 1623 pushENamedAs env x n t
adamc@205 1624 end
adamc@754 1625 | DView (tn, x, n, _, c) =>
adamc@754 1626 let
adamc@754 1627 val ct = (CModProj (tn, [], "sql_view"), loc)
adamc@754 1628 val ct = (CApp (ct, c), loc)
adamc@754 1629 in
adamc@754 1630 pushENamedAs env x n ct
adamc@754 1631 end
adamc@563 1632 | DClass (x, n, k, c) =>
adamc@213 1633 let
adamc@563 1634 val k = (KArrow (k, (KType, loc)), loc)
adamc@213 1635 val env = pushCNamedAs env x n k (SOME c)
adamc@213 1636 in
adamc@213 1637 pushClass env n
adamc@213 1638 end
adamc@271 1639 | DDatabase _ => env
adamc@459 1640 | DCookie (tn, x, n, c) =>
adamc@459 1641 let
adamc@459 1642 val t = (CApp ((CModProj (tn, [], "cookie"), loc), c), loc)
adamc@459 1643 in
adamc@459 1644 pushENamedAs env x n t
adamc@459 1645 end
adamc@720 1646 | DStyle (tn, x, n) =>
adamc@718 1647 let
adamc@720 1648 val t = (CModProj (tn, [], "css_class"), loc)
adamc@718 1649 in
adamc@718 1650 pushENamedAs env x n t
adamc@718 1651 end
adamc@1075 1652 | DTask _ => env
adamc@1199 1653 | DPolicy _ => env
adam@1294 1654 | DOnError _ => env
adamc@157 1655
adamc@2 1656 end