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annotate src/elab_util.sml @ 198:ab86aa858e6c

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'Option' datatype encoding
author Adam Chlipala <adamc@hcoop.net>
date Sat, 09 Aug 2008 19:23:31 -0400
parents aa54250f58ac
children dd82457fda82
rev   line source
adamc@2 1 (* Copyright (c) 2008, Adam Chlipala
adamc@2 2 * All rights reserved.
adamc@2 3 *
adamc@2 4 * Redistribution and use in source and binary forms, with or without
adamc@2 5 * modification, are permitted provided that the following conditions are met:
adamc@2 6 *
adamc@2 7 * - Redistributions of source code must retain the above copyright notice,
adamc@2 8 * this list of conditions and the following disclaimer.
adamc@2 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@2 10 * this list of conditions and the following disclaimer in the documentation
adamc@2 11 * and/or other materials provided with the distribution.
adamc@2 12 * - The names of contributors may not be used to endorse or promote products
adamc@2 13 * derived from this software without specific prior written permission.
adamc@2 14 *
adamc@2 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@2 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@2 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@2 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@2 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@2 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@2 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@2 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@2 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@2 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@2 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@2 26 *)
adamc@2 27
adamc@2 28 structure ElabUtil :> ELAB_UTIL = struct
adamc@2 29
adamc@2 30 open Elab
adamc@2 31
adamc@188 32 fun classifyDatatype xncs =
adamc@198 33 case xncs of
adamc@198 34 [(_, _, NONE), (_, _, SOME _)] => Option
adamc@198 35 | [(_, _, SOME _), (_, _, NONE)] => Option
adamc@198 36 | _ =>
adamc@198 37 if List.all (fn (_, _, NONE) => true | _ => false) xncs then
adamc@198 38 Enum
adamc@198 39 else
adamc@198 40 Default
adamc@188 41
adamc@2 42 structure S = Search
adamc@2 43
adamc@2 44 structure Kind = struct
adamc@2 45
adamc@6 46 fun mapfold f =
adamc@2 47 let
adamc@2 48 fun mfk k acc =
adamc@2 49 S.bindP (mfk' k acc, f)
adamc@2 50
adamc@2 51 and mfk' (kAll as (k, loc)) =
adamc@2 52 case k of
adamc@2 53 KType => S.return2 kAll
adamc@2 54
adamc@2 55 | KArrow (k1, k2) =>
adamc@2 56 S.bind2 (mfk k1,
adamc@2 57 fn k1' =>
adamc@2 58 S.map2 (mfk k2,
adamc@2 59 fn k2' =>
adamc@2 60 (KArrow (k1', k2'), loc)))
adamc@2 61
adamc@2 62 | KName => S.return2 kAll
adamc@2 63
adamc@2 64 | KRecord k =>
adamc@2 65 S.map2 (mfk k,
adamc@2 66 fn k' =>
adamc@2 67 (KRecord k', loc))
adamc@2 68
adamc@82 69 | KUnit => S.return2 kAll
adamc@82 70
adamc@2 71 | KError => S.return2 kAll
adamc@2 72
adamc@76 73 | KUnif (_, _, ref (SOME k)) => mfk' k
adamc@2 74 | KUnif _ => S.return2 kAll
adamc@2 75 in
adamc@2 76 mfk
adamc@2 77 end
adamc@2 78
adamc@2 79 fun exists f k =
adamc@6 80 case mapfold (fn k => fn () =>
adamc@6 81 if f k then
adamc@6 82 S.Return ()
adamc@6 83 else
adamc@6 84 S.Continue (k, ())) k () of
adamc@6 85 S.Return _ => true
adamc@6 86 | S.Continue _ => false
adamc@6 87
adamc@6 88 end
adamc@6 89
adamc@6 90 structure Con = struct
adamc@6 91
adamc@11 92 datatype binder =
adamc@11 93 Rel of string * Elab.kind
adamc@11 94 | Named of string * Elab.kind
adamc@11 95
adamc@11 96 fun mapfoldB {kind = fk, con = fc, bind} =
adamc@6 97 let
adamc@6 98 val mfk = Kind.mapfold fk
adamc@6 99
adamc@11 100 fun mfc ctx c acc =
adamc@11 101 S.bindP (mfc' ctx c acc, fc ctx)
adamc@6 102
adamc@11 103 and mfc' ctx (cAll as (c, loc)) =
adamc@6 104 case c of
adamc@6 105 TFun (c1, c2) =>
adamc@11 106 S.bind2 (mfc ctx c1,
adamc@6 107 fn c1' =>
adamc@11 108 S.map2 (mfc ctx c2,
adamc@6 109 fn c2' =>
adamc@6 110 (TFun (c1', c2'), loc)))
adamc@6 111 | TCFun (e, x, k, c) =>
adamc@6 112 S.bind2 (mfk k,
adamc@6 113 fn k' =>
adamc@11 114 S.map2 (mfc (bind (ctx, Rel (x, k))) c,
adamc@6 115 fn c' =>
adamc@6 116 (TCFun (e, x, k', c'), loc)))
adamc@85 117 | TDisjoint (c1, c2, c3) =>
adamc@85 118 S.bind2 (mfc ctx c1,
adamc@85 119 fn c1' =>
adamc@85 120 S.bind2 (mfc ctx c2,
adamc@85 121 fn c2' =>
adamc@85 122 S.map2 (mfc ctx c3,
adamc@85 123 fn c3' =>
adamc@85 124 (TDisjoint (c1', c2', c3'), loc))))
adamc@6 125 | TRecord c =>
adamc@11 126 S.map2 (mfc ctx c,
adamc@6 127 fn c' =>
adamc@6 128 (TRecord c', loc))
adamc@6 129
adamc@6 130 | CRel _ => S.return2 cAll
adamc@6 131 | CNamed _ => S.return2 cAll
adamc@34 132 | CModProj _ => S.return2 cAll
adamc@6 133 | CApp (c1, c2) =>
adamc@11 134 S.bind2 (mfc ctx c1,
adamc@6 135 fn c1' =>
adamc@11 136 S.map2 (mfc ctx c2,
adamc@6 137 fn c2' =>
adamc@6 138 (CApp (c1', c2'), loc)))
adamc@8 139 | CAbs (x, k, c) =>
adamc@6 140 S.bind2 (mfk k,
adamc@6 141 fn k' =>
adamc@11 142 S.map2 (mfc (bind (ctx, Rel (x, k))) c,
adamc@6 143 fn c' =>
adamc@8 144 (CAbs (x, k', c'), loc)))
adamc@84 145 | CDisjoint (c1, c2, c3) =>
adamc@84 146 S.bind2 (mfc ctx c1,
adamc@84 147 fn c1' =>
adamc@84 148 S.bind2 (mfc ctx c2,
adamc@84 149 fn c2' =>
adamc@84 150 S.map2 (mfc ctx c3,
adamc@84 151 fn c3' =>
adamc@84 152 (CDisjoint (c1', c2', c3'), loc))))
adamc@6 153
adamc@6 154 | CName _ => S.return2 cAll
adamc@6 155
adamc@6 156 | CRecord (k, xcs) =>
adamc@6 157 S.bind2 (mfk k,
adamc@6 158 fn k' =>
adamc@6 159 S.map2 (ListUtil.mapfold (fn (x, c) =>
adamc@11 160 S.bind2 (mfc ctx x,
adamc@6 161 fn x' =>
adamc@11 162 S.map2 (mfc ctx c,
adamc@6 163 fn c' =>
adamc@6 164 (x', c'))))
adamc@6 165 xcs,
adamc@6 166 fn xcs' =>
adamc@6 167 (CRecord (k', xcs'), loc)))
adamc@6 168 | CConcat (c1, c2) =>
adamc@11 169 S.bind2 (mfc ctx c1,
adamc@6 170 fn c1' =>
adamc@11 171 S.map2 (mfc ctx c2,
adamc@6 172 fn c2' =>
adamc@6 173 (CConcat (c1', c2'), loc)))
adamc@67 174 | CFold (k1, k2) =>
adamc@67 175 S.bind2 (mfk k1,
adamc@67 176 fn k1' =>
adamc@67 177 S.map2 (mfk k2,
adamc@67 178 fn k2' =>
adamc@67 179 (CFold (k1', k2'), loc)))
adamc@6 180
adamc@82 181 | CUnit => S.return2 cAll
adamc@82 182
adamc@6 183 | CError => S.return2 cAll
adamc@76 184 | CUnif (_, _, _, ref (SOME c)) => mfc' ctx c
adamc@6 185 | CUnif _ => S.return2 cAll
adamc@6 186 in
adamc@6 187 mfc
adamc@6 188 end
adamc@6 189
adamc@11 190 fun mapfold {kind = fk, con = fc} =
adamc@11 191 mapfoldB {kind = fk,
adamc@11 192 con = fn () => fc,
adamc@11 193 bind = fn ((), _) => ()} ()
adamc@11 194
adamc@11 195 fun mapB {kind, con, bind} ctx c =
adamc@11 196 case mapfoldB {kind = fn k => fn () => S.Continue (kind k, ()),
adamc@11 197 con = fn ctx => fn c => fn () => S.Continue (con ctx c, ()),
adamc@11 198 bind = bind} ctx c () of
adamc@11 199 S.Continue (c, ()) => c
adamc@34 200 | S.Return _ => raise Fail "ElabUtil.Con.mapB: Impossible"
adamc@34 201
adamc@34 202 fun map {kind, con} s =
adamc@34 203 case mapfold {kind = fn k => fn () => S.Continue (kind k, ()),
adamc@34 204 con = fn c => fn () => S.Continue (con c, ())} s () of
adamc@34 205 S.Return () => raise Fail "ElabUtil.Con.map: Impossible"
adamc@34 206 | S.Continue (s, ()) => s
adamc@11 207
adamc@6 208 fun exists {kind, con} k =
adamc@6 209 case mapfold {kind = fn k => fn () =>
adamc@6 210 if kind k then
adamc@6 211 S.Return ()
adamc@6 212 else
adamc@6 213 S.Continue (k, ()),
adamc@6 214 con = fn c => fn () =>
adamc@6 215 if con c then
adamc@6 216 S.Return ()
adamc@6 217 else
adamc@6 218 S.Continue (c, ())} k () of
adamc@2 219 S.Return _ => true
adamc@2 220 | S.Continue _ => false
adamc@2 221
adamc@2 222 end
adamc@2 223
adamc@10 224 structure Exp = struct
adamc@10 225
adamc@11 226 datatype binder =
adamc@11 227 RelC of string * Elab.kind
adamc@11 228 | NamedC of string * Elab.kind
adamc@11 229 | RelE of string * Elab.con
adamc@11 230 | NamedE of string * Elab.con
adamc@11 231
adamc@11 232 fun mapfoldB {kind = fk, con = fc, exp = fe, bind} =
adamc@10 233 let
adamc@10 234 val mfk = Kind.mapfold fk
adamc@10 235
adamc@11 236 fun bind' (ctx, b) =
adamc@11 237 let
adamc@11 238 val b' = case b of
adamc@11 239 Con.Rel x => RelC x
adamc@11 240 | Con.Named x => NamedC x
adamc@11 241 in
adamc@11 242 bind (ctx, b')
adamc@11 243 end
adamc@11 244 val mfc = Con.mapfoldB {kind = fk, con = fc, bind = bind'}
adamc@10 245
adamc@11 246 fun mfe ctx e acc =
adamc@11 247 S.bindP (mfe' ctx e acc, fe ctx)
adamc@11 248
adamc@11 249 and mfe' ctx (eAll as (e, loc)) =
adamc@10 250 case e of
adamc@14 251 EPrim _ => S.return2 eAll
adamc@14 252 | ERel _ => S.return2 eAll
adamc@10 253 | ENamed _ => S.return2 eAll
adamc@34 254 | EModProj _ => S.return2 eAll
adamc@10 255 | EApp (e1, e2) =>
adamc@11 256 S.bind2 (mfe ctx e1,
adamc@10 257 fn e1' =>
adamc@11 258 S.map2 (mfe ctx e2,
adamc@10 259 fn e2' =>
adamc@10 260 (EApp (e1', e2'), loc)))
adamc@26 261 | EAbs (x, dom, ran, e) =>
adamc@26 262 S.bind2 (mfc ctx dom,
adamc@26 263 fn dom' =>
adamc@26 264 S.bind2 (mfc ctx ran,
adamc@26 265 fn ran' =>
adamc@26 266 S.map2 (mfe (bind (ctx, RelE (x, dom'))) e,
adamc@26 267 fn e' =>
adamc@26 268 (EAbs (x, dom', ran', e'), loc))))
adamc@26 269
adamc@10 270 | ECApp (e, c) =>
adamc@11 271 S.bind2 (mfe ctx e,
adamc@10 272 fn e' =>
adamc@11 273 S.map2 (mfc ctx c,
adamc@10 274 fn c' =>
adamc@10 275 (ECApp (e', c'), loc)))
adamc@10 276 | ECAbs (expl, x, k, e) =>
adamc@10 277 S.bind2 (mfk k,
adamc@10 278 fn k' =>
adamc@11 279 S.map2 (mfe (bind (ctx, RelC (x, k))) e,
adamc@10 280 fn e' =>
adamc@10 281 (ECAbs (expl, x, k', e'), loc)))
adamc@10 282
adamc@12 283 | ERecord xes =>
adamc@29 284 S.map2 (ListUtil.mapfold (fn (x, e, t) =>
adamc@12 285 S.bind2 (mfc ctx x,
adamc@12 286 fn x' =>
adamc@29 287 S.bind2 (mfe ctx e,
adamc@12 288 fn e' =>
adamc@29 289 S.map2 (mfc ctx t,
adamc@29 290 fn t' =>
adamc@29 291 (x', e', t')))))
adamc@12 292 xes,
adamc@12 293 fn xes' =>
adamc@12 294 (ERecord xes', loc))
adamc@12 295 | EField (e, c, {field, rest}) =>
adamc@12 296 S.bind2 (mfe ctx e,
adamc@12 297 fn e' =>
adamc@12 298 S.bind2 (mfc ctx c,
adamc@12 299 fn c' =>
adamc@12 300 S.bind2 (mfc ctx field,
adamc@12 301 fn field' =>
adamc@12 302 S.map2 (mfc ctx rest,
adamc@12 303 fn rest' =>
adamc@12 304 (EField (e', c', {field = field', rest = rest'}), loc)))))
adamc@149 305 | ECut (e, c, {field, rest}) =>
adamc@149 306 S.bind2 (mfe ctx e,
adamc@149 307 fn e' =>
adamc@149 308 S.bind2 (mfc ctx c,
adamc@149 309 fn c' =>
adamc@149 310 S.bind2 (mfc ctx field,
adamc@149 311 fn field' =>
adamc@149 312 S.map2 (mfc ctx rest,
adamc@149 313 fn rest' =>
adamc@149 314 (ECut (e', c', {field = field', rest = rest'}), loc)))))
adamc@12 315
adamc@71 316 | EFold k =>
adamc@71 317 S.map2 (mfk k,
adamc@71 318 fn k' =>
adamc@71 319 (EFold k', loc))
adamc@71 320
adamc@182 321 | ECase (e, pes, {disc, result}) =>
adamc@171 322 S.bind2 (mfe ctx e,
adamc@171 323 fn e' =>
adamc@171 324 S.bind2 (ListUtil.mapfold (fn (p, e) =>
adamc@171 325 S.map2 (mfe ctx e,
adamc@171 326 fn e' => (p, e'))) pes,
adamc@171 327 fn pes' =>
adamc@182 328 S.bind2 (mfc ctx disc,
adamc@182 329 fn disc' =>
adamc@182 330 S.map2 (mfc ctx result,
adamc@182 331 fn result' =>
adamc@182 332 (ECase (e', pes', {disc = disc', result = result'}), loc)))))
adamc@171 333
adamc@10 334 | EError => S.return2 eAll
adamc@10 335 in
adamc@10 336 mfe
adamc@10 337 end
adamc@10 338
adamc@11 339 fun mapfold {kind = fk, con = fc, exp = fe} =
adamc@11 340 mapfoldB {kind = fk,
adamc@11 341 con = fn () => fc,
adamc@11 342 exp = fn () => fe,
adamc@11 343 bind = fn ((), _) => ()} ()
adamc@11 344
adamc@10 345 fun exists {kind, con, exp} k =
adamc@10 346 case mapfold {kind = fn k => fn () =>
adamc@10 347 if kind k then
adamc@10 348 S.Return ()
adamc@10 349 else
adamc@10 350 S.Continue (k, ()),
adamc@10 351 con = fn c => fn () =>
adamc@10 352 if con c then
adamc@10 353 S.Return ()
adamc@10 354 else
adamc@10 355 S.Continue (c, ()),
adamc@10 356 exp = fn e => fn () =>
adamc@10 357 if exp e then
adamc@10 358 S.Return ()
adamc@10 359 else
adamc@10 360 S.Continue (e, ())} k () of
adamc@10 361 S.Return _ => true
adamc@10 362 | S.Continue _ => false
adamc@10 363
adamc@10 364 end
adamc@10 365
adamc@34 366 structure Sgn = struct
adamc@34 367
adamc@34 368 datatype binder =
adamc@34 369 RelC of string * Elab.kind
adamc@34 370 | NamedC of string * Elab.kind
adamc@34 371 | Str of string * Elab.sgn
adamc@59 372 | Sgn of string * Elab.sgn
adamc@34 373
adamc@34 374 fun mapfoldB {kind, con, sgn_item, sgn, bind} =
adamc@34 375 let
adamc@34 376 fun bind' (ctx, b) =
adamc@34 377 let
adamc@34 378 val b' = case b of
adamc@34 379 Con.Rel x => RelC x
adamc@34 380 | Con.Named x => NamedC x
adamc@34 381 in
adamc@34 382 bind (ctx, b')
adamc@34 383 end
adamc@34 384 val con = Con.mapfoldB {kind = kind, con = con, bind = bind'}
adamc@34 385
adamc@34 386 val kind = Kind.mapfold kind
adamc@34 387
adamc@34 388 fun sgi ctx si acc =
adamc@34 389 S.bindP (sgi' ctx si acc, sgn_item ctx)
adamc@34 390
adamc@156 391 and sgi' ctx (siAll as (si, loc)) =
adamc@34 392 case si of
adamc@34 393 SgiConAbs (x, n, k) =>
adamc@34 394 S.map2 (kind k,
adamc@34 395 fn k' =>
adamc@34 396 (SgiConAbs (x, n, k'), loc))
adamc@34 397 | SgiCon (x, n, k, c) =>
adamc@34 398 S.bind2 (kind k,
adamc@34 399 fn k' =>
adamc@34 400 S.map2 (con ctx c,
adamc@34 401 fn c' =>
adamc@34 402 (SgiCon (x, n, k', c'), loc)))
adamc@191 403 | SgiDatatype (x, n, xs, xncs) =>
adamc@156 404 S.map2 (ListUtil.mapfold (fn (x, n, c) =>
adamc@156 405 case c of
adamc@156 406 NONE => S.return2 (x, n, c)
adamc@156 407 | SOME c =>
adamc@156 408 S.map2 (con ctx c,
adamc@156 409 fn c' => (x, n, SOME c'))) xncs,
adamc@156 410 fn xncs' =>
adamc@191 411 (SgiDatatype (x, n, xs, xncs'), loc))
adamc@191 412 | SgiDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
adamc@162 413 S.map2 (ListUtil.mapfold (fn (x, n, c) =>
adamc@162 414 case c of
adamc@162 415 NONE => S.return2 (x, n, c)
adamc@162 416 | SOME c =>
adamc@162 417 S.map2 (con ctx c,
adamc@162 418 fn c' => (x, n, SOME c'))) xncs,
adamc@162 419 fn xncs' =>
adamc@191 420 (SgiDatatypeImp (x, n, m1, ms, s, xs, xncs'), loc))
adamc@34 421 | SgiVal (x, n, c) =>
adamc@34 422 S.map2 (con ctx c,
adamc@34 423 fn c' =>
adamc@34 424 (SgiVal (x, n, c'), loc))
adamc@34 425 | SgiStr (x, n, s) =>
adamc@34 426 S.map2 (sg ctx s,
adamc@34 427 fn s' =>
adamc@34 428 (SgiStr (x, n, s'), loc))
adamc@59 429 | SgiSgn (x, n, s) =>
adamc@59 430 S.map2 (sg ctx s,
adamc@59 431 fn s' =>
adamc@59 432 (SgiSgn (x, n, s'), loc))
adamc@88 433 | SgiConstraint (c1, c2) =>
adamc@88 434 S.bind2 (con ctx c1,
adamc@88 435 fn c1' =>
adamc@88 436 S.map2 (con ctx c2,
adamc@88 437 fn c2' =>
adamc@88 438 (SgiConstraint (c1', c2'), loc)))
adamc@34 439
adamc@34 440 and sg ctx s acc =
adamc@34 441 S.bindP (sg' ctx s acc, sgn ctx)
adamc@34 442
adamc@34 443 and sg' ctx (sAll as (s, loc)) =
adamc@34 444 case s of
adamc@34 445 SgnConst sgis =>
adamc@34 446 S.map2 (ListUtil.mapfoldB (fn (ctx, si) =>
adamc@34 447 (case #1 si of
adamc@34 448 SgiConAbs (x, _, k) =>
adamc@34 449 bind (ctx, NamedC (x, k))
adamc@34 450 | SgiCon (x, _, k, _) =>
adamc@34 451 bind (ctx, NamedC (x, k))
adamc@191 452 | SgiDatatype (x, n, _, xncs) =>
adamc@156 453 bind (ctx, NamedC (x, (KType, loc)))
adamc@191 454 | SgiDatatypeImp (x, _, _, _, _, _, _) =>
adamc@156 455 bind (ctx, NamedC (x, (KType, loc)))
adamc@34 456 | SgiVal _ => ctx
adamc@34 457 | SgiStr (x, _, sgn) =>
adamc@59 458 bind (ctx, Str (x, sgn))
adamc@59 459 | SgiSgn (x, _, sgn) =>
adamc@88 460 bind (ctx, Sgn (x, sgn))
adamc@88 461 | SgiConstraint _ => ctx,
adamc@34 462 sgi ctx si)) ctx sgis,
adamc@34 463 fn sgis' =>
adamc@34 464 (SgnConst sgis', loc))
adamc@34 465
adamc@34 466 | SgnVar _ => S.return2 sAll
adamc@41 467 | SgnFun (m, n, s1, s2) =>
adamc@41 468 S.bind2 (sg ctx s1,
adamc@41 469 fn s1' =>
adamc@41 470 S.map2 (sg (bind (ctx, Str (m, s1'))) s2,
adamc@41 471 fn s2' =>
adamc@41 472 (SgnFun (m, n, s1', s2'), loc)))
adamc@59 473 | SgnProj _ => S.return2 sAll
adamc@42 474 | SgnWhere (sgn, x, c) =>
adamc@42 475 S.bind2 (sg ctx sgn,
adamc@42 476 fn sgn' =>
adamc@42 477 S.map2 (con ctx c,
adamc@42 478 fn c' =>
adamc@42 479 (SgnWhere (sgn', x, c'), loc)))
adamc@34 480 | SgnError => S.return2 sAll
adamc@34 481 in
adamc@34 482 sg
adamc@34 483 end
adamc@34 484
adamc@34 485 fun mapfold {kind, con, sgn_item, sgn} =
adamc@34 486 mapfoldB {kind = kind,
adamc@34 487 con = fn () => con,
adamc@34 488 sgn_item = fn () => sgn_item,
adamc@34 489 sgn = fn () => sgn,
adamc@34 490 bind = fn ((), _) => ()} ()
adamc@34 491
adamc@34 492 fun map {kind, con, sgn_item, sgn} s =
adamc@34 493 case mapfold {kind = fn k => fn () => S.Continue (kind k, ()),
adamc@34 494 con = fn c => fn () => S.Continue (con c, ()),
adamc@34 495 sgn_item = fn si => fn () => S.Continue (sgn_item si, ()),
adamc@34 496 sgn = fn s => fn () => S.Continue (sgn s, ())} s () of
adamc@34 497 S.Return () => raise Fail "Elab_util.Sgn.map"
adamc@34 498 | S.Continue (s, ()) => s
adamc@34 499
adamc@2 500 end
adamc@34 501
adamc@76 502 structure Decl = struct
adamc@76 503
adamc@76 504 datatype binder =
adamc@76 505 RelC of string * Elab.kind
adamc@76 506 | NamedC of string * Elab.kind
adamc@76 507 | RelE of string * Elab.con
adamc@76 508 | NamedE of string * Elab.con
adamc@76 509 | Str of string * Elab.sgn
adamc@76 510 | Sgn of string * Elab.sgn
adamc@76 511
adamc@76 512 fun mapfoldB {kind = fk, con = fc, exp = fe, sgn_item = fsgi, sgn = fsg, str = fst, decl = fd, bind} =
adamc@76 513 let
adamc@76 514 val mfk = Kind.mapfold fk
adamc@76 515
adamc@76 516 fun bind' (ctx, b) =
adamc@76 517 let
adamc@76 518 val b' = case b of
adamc@76 519 Con.Rel x => RelC x
adamc@76 520 | Con.Named x => NamedC x
adamc@76 521 in
adamc@76 522 bind (ctx, b')
adamc@76 523 end
adamc@76 524 val mfc = Con.mapfoldB {kind = fk, con = fc, bind = bind'}
adamc@76 525
adamc@76 526 fun bind' (ctx, b) =
adamc@76 527 let
adamc@76 528 val b' = case b of
adamc@76 529 Exp.RelC x => RelC x
adamc@76 530 | Exp.NamedC x => NamedC x
adamc@76 531 | Exp.RelE x => RelE x
adamc@76 532 | Exp.NamedE x => NamedE x
adamc@76 533 in
adamc@76 534 bind (ctx, b')
adamc@76 535 end
adamc@76 536 val mfe = Exp.mapfoldB {kind = fk, con = fc, exp = fe, bind = bind'}
adamc@76 537
adamc@76 538 fun bind' (ctx, b) =
adamc@76 539 let
adamc@76 540 val b' = case b of
adamc@76 541 Sgn.RelC x => RelC x
adamc@76 542 | Sgn.NamedC x => NamedC x
adamc@76 543 | Sgn.Sgn x => Sgn x
adamc@76 544 | Sgn.Str x => Str x
adamc@76 545 in
adamc@76 546 bind (ctx, b')
adamc@76 547 end
adamc@76 548 val mfsg = Sgn.mapfoldB {kind = fk, con = fc, sgn_item = fsgi, sgn = fsg, bind = bind'}
adamc@76 549
adamc@76 550 fun mfst ctx str acc =
adamc@76 551 S.bindP (mfst' ctx str acc, fst ctx)
adamc@76 552
adamc@76 553 and mfst' ctx (strAll as (str, loc)) =
adamc@76 554 case str of
adamc@76 555 StrConst ds =>
adamc@76 556 S.map2 (ListUtil.mapfoldB (fn (ctx, d) =>
adamc@76 557 (case #1 d of
adamc@76 558 DCon (x, _, k, _) =>
adamc@76 559 bind (ctx, NamedC (x, k))
adamc@191 560 | DDatatype (x, n, xs, xncs) =>
adamc@156 561 let
adamc@156 562 val ctx = bind (ctx, NamedC (x, (KType, loc)))
adamc@156 563 in
adamc@156 564 foldl (fn ((x, _, co), ctx) =>
adamc@156 565 let
adamc@156 566 val t =
adamc@156 567 case co of
adamc@156 568 NONE => CNamed n
adamc@156 569 | SOME t => TFun (t, (CNamed n, loc))
adamc@191 570
adamc@191 571 val k = (KType, loc)
adamc@191 572 val t = (t, loc)
adamc@191 573 val t = foldr (fn (x, t) =>
adamc@191 574 (TCFun (Explicit,
adamc@191 575 x,
adamc@191 576 k,
adamc@191 577 t), loc))
adamc@191 578 t xs
adamc@156 579 in
adamc@191 580 bind (ctx, NamedE (x, t))
adamc@156 581 end)
adamc@156 582 ctx xncs
adamc@156 583 end
adamc@191 584 | DDatatypeImp (x, n, m, ms, x', _, _) =>
adamc@156 585 bind (ctx, NamedC (x, (KType, loc)))
adamc@76 586 | DVal (x, _, c, _) =>
adamc@76 587 bind (ctx, NamedE (x, c))
adamc@123 588 | DValRec vis =>
adamc@123 589 foldl (fn ((x, _, c, _), ctx) => bind (ctx, NamedE (x, c))) ctx vis
adamc@76 590 | DSgn (x, _, sgn) =>
adamc@76 591 bind (ctx, Sgn (x, sgn))
adamc@76 592 | DStr (x, _, sgn, _) =>
adamc@76 593 bind (ctx, Str (x, sgn))
adamc@76 594 | DFfiStr (x, _, sgn) =>
adamc@88 595 bind (ctx, Str (x, sgn))
adamc@100 596 | DConstraint _ => ctx
adamc@109 597 | DExport _ => ctx,
adamc@76 598 mfd ctx d)) ctx ds,
adamc@76 599 fn ds' => (StrConst ds', loc))
adamc@76 600 | StrVar _ => S.return2 strAll
adamc@76 601 | StrProj (str, x) =>
adamc@76 602 S.map2 (mfst ctx str,
adamc@76 603 fn str' =>
adamc@76 604 (StrProj (str', x), loc))
adamc@76 605 | StrFun (x, n, sgn1, sgn2, str) =>
adamc@76 606 S.bind2 (mfsg ctx sgn1,
adamc@76 607 fn sgn1' =>
adamc@76 608 S.bind2 (mfsg ctx sgn2,
adamc@76 609 fn sgn2' =>
adamc@76 610 S.map2 (mfst ctx str,
adamc@76 611 fn str' =>
adamc@76 612 (StrFun (x, n, sgn1', sgn2', str'), loc))))
adamc@76 613 | StrApp (str1, str2) =>
adamc@76 614 S.bind2 (mfst ctx str1,
adamc@76 615 fn str1' =>
adamc@76 616 S.map2 (mfst ctx str2,
adamc@76 617 fn str2' =>
adamc@76 618 (StrApp (str1', str2'), loc)))
adamc@76 619 | StrError => S.return2 strAll
adamc@76 620
adamc@76 621 and mfd ctx d acc =
adamc@76 622 S.bindP (mfd' ctx d acc, fd ctx)
adamc@76 623
adamc@76 624 and mfd' ctx (dAll as (d, loc)) =
adamc@76 625 case d of
adamc@76 626 DCon (x, n, k, c) =>
adamc@76 627 S.bind2 (mfk k,
adamc@76 628 fn k' =>
adamc@76 629 S.map2 (mfc ctx c,
adamc@76 630 fn c' =>
adamc@76 631 (DCon (x, n, k', c'), loc)))
adamc@191 632 | DDatatype (x, n, xs, xncs) =>
adamc@156 633 S.map2 (ListUtil.mapfold (fn (x, n, c) =>
adamc@156 634 case c of
adamc@156 635 NONE => S.return2 (x, n, c)
adamc@156 636 | SOME c =>
adamc@156 637 S.map2 (mfc ctx c,
adamc@156 638 fn c' => (x, n, SOME c'))) xncs,
adamc@156 639 fn xncs' =>
adamc@191 640 (DDatatype (x, n, xs, xncs'), loc))
adamc@191 641 | DDatatypeImp (x, n, m1, ms, s, xs, xncs) =>
adamc@162 642 S.map2 (ListUtil.mapfold (fn (x, n, c) =>
adamc@162 643 case c of
adamc@162 644 NONE => S.return2 (x, n, c)
adamc@162 645 | SOME c =>
adamc@162 646 S.map2 (mfc ctx c,
adamc@162 647 fn c' => (x, n, SOME c'))) xncs,
adamc@162 648 fn xncs' =>
adamc@191 649 (DDatatypeImp (x, n, m1, ms, s, xs, xncs'), loc))
adamc@123 650 | DVal vi =>
adamc@123 651 S.map2 (mfvi ctx vi,
adamc@123 652 fn vi' =>
adamc@123 653 (DVal vi', loc))
adamc@123 654 | DValRec vis =>
adamc@123 655 S.map2 (ListUtil.mapfold (mfvi ctx) vis,
adamc@123 656 fn vis' =>
adamc@123 657 (DValRec vis', loc))
adamc@76 658 | DSgn (x, n, sgn) =>
adamc@76 659 S.map2 (mfsg ctx sgn,
adamc@76 660 fn sgn' =>
adamc@76 661 (DSgn (x, n, sgn'), loc))
adamc@76 662 | DStr (x, n, sgn, str) =>
adamc@76 663 S.bind2 (mfsg ctx sgn,
adamc@76 664 fn sgn' =>
adamc@76 665 S.map2 (mfst ctx str,
adamc@76 666 fn str' =>
adamc@76 667 (DStr (x, n, sgn', str'), loc)))
adamc@76 668 | DFfiStr (x, n, sgn) =>
adamc@76 669 S.map2 (mfsg ctx sgn,
adamc@76 670 fn sgn' =>
adamc@76 671 (DFfiStr (x, n, sgn'), loc))
adamc@88 672 | DConstraint (c1, c2) =>
adamc@88 673 S.bind2 (mfc ctx c1,
adamc@88 674 fn c1' =>
adamc@88 675 S.map2 (mfc ctx c2,
adamc@88 676 fn c2' =>
adamc@88 677 (DConstraint (c1', c2'), loc)))
adamc@109 678 | DExport (en, sgn, str) =>
adamc@109 679 S.bind2 (mfsg ctx sgn,
adamc@109 680 fn sgn' =>
adamc@109 681 S.map2 (mfst ctx str,
adamc@109 682 fn str' =>
adamc@109 683 (DExport (en, sgn', str'), loc)))
adamc@123 684
adamc@123 685 and mfvi ctx (x, n, c, e) =
adamc@123 686 S.bind2 (mfc ctx c,
adamc@123 687 fn c' =>
adamc@123 688 S.map2 (mfe ctx e,
adamc@123 689 fn e' =>
adamc@123 690 (x, n, c', e')))
adamc@76 691 in
adamc@76 692 mfd
adamc@76 693 end
adamc@76 694
adamc@76 695 fun mapfold {kind, con, exp, sgn_item, sgn, str, decl} =
adamc@76 696 mapfoldB {kind = kind,
adamc@76 697 con = fn () => con,
adamc@76 698 exp = fn () => exp,
adamc@76 699 sgn_item = fn () => sgn_item,
adamc@76 700 sgn = fn () => sgn,
adamc@76 701 str = fn () => str,
adamc@76 702 decl = fn () => decl,
adamc@76 703 bind = fn ((), _) => ()} ()
adamc@76 704
adamc@76 705 fun exists {kind, con, exp, sgn_item, sgn, str, decl} k =
adamc@76 706 case mapfold {kind = fn k => fn () =>
adamc@76 707 if kind k then
adamc@76 708 S.Return ()
adamc@76 709 else
adamc@76 710 S.Continue (k, ()),
adamc@76 711 con = fn c => fn () =>
adamc@76 712 if con c then
adamc@76 713 S.Return ()
adamc@76 714 else
adamc@76 715 S.Continue (c, ()),
adamc@76 716 exp = fn e => fn () =>
adamc@76 717 if exp e then
adamc@76 718 S.Return ()
adamc@76 719 else
adamc@76 720 S.Continue (e, ()),
adamc@76 721 sgn_item = fn sgi => fn () =>
adamc@76 722 if sgn_item sgi then
adamc@76 723 S.Return ()
adamc@76 724 else
adamc@76 725 S.Continue (sgi, ()),
adamc@76 726 sgn = fn x => fn () =>
adamc@76 727 if sgn x then
adamc@76 728 S.Return ()
adamc@76 729 else
adamc@76 730 S.Continue (x, ()),
adamc@76 731 str = fn x => fn () =>
adamc@76 732 if str x then
adamc@76 733 S.Return ()
adamc@76 734 else
adamc@76 735 S.Continue (x, ()),
adamc@76 736 decl = fn x => fn () =>
adamc@76 737 if decl x then
adamc@76 738 S.Return ()
adamc@76 739 else
adamc@76 740 S.Continue (x, ())} k () of
adamc@76 741 S.Return _ => true
adamc@76 742 | S.Continue _ => false
adamc@76 743
adamc@76 744 fun search {kind, con, exp, sgn_item, sgn, str, decl} k =
adamc@76 745 case mapfold {kind = fn x => fn () =>
adamc@76 746 case kind x of
adamc@76 747 NONE => S.Continue (x, ())
adamc@76 748 | SOME v => S.Return v,
adamc@76 749
adamc@76 750 con = fn x => fn () =>
adamc@76 751 case con x of
adamc@76 752 NONE => S.Continue (x, ())
adamc@76 753 | SOME v => S.Return v,
adamc@76 754
adamc@76 755 exp = fn x => fn () =>
adamc@76 756 case exp x of
adamc@76 757 NONE => S.Continue (x, ())
adamc@76 758 | SOME v => S.Return v,
adamc@76 759
adamc@76 760 sgn_item = fn x => fn () =>
adamc@76 761 case sgn_item x of
adamc@76 762 NONE => S.Continue (x, ())
adamc@76 763 | SOME v => S.Return v,
adamc@76 764
adamc@76 765 sgn = fn x => fn () =>
adamc@76 766 case sgn x of
adamc@76 767 NONE => S.Continue (x, ())
adamc@76 768 | SOME v => S.Return v,
adamc@76 769
adamc@76 770 str = fn x => fn () =>
adamc@76 771 case str x of
adamc@76 772 NONE => S.Continue (x, ())
adamc@76 773 | SOME v => S.Return v,
adamc@76 774
adamc@76 775 decl = fn x => fn () =>
adamc@76 776 case decl x of
adamc@76 777 NONE => S.Continue (x, ())
adamc@76 778 | SOME v => S.Return v
adamc@76 779
adamc@76 780 } k () of
adamc@76 781 S.Return x => SOME x
adamc@76 782 | S.Continue _ => NONE
adamc@76 783
adamc@34 784 end
adamc@76 785
adamc@76 786 end