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annotate src/mono_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 890a61991263
children 326fb4686f60
rev   line source
adamc@26 1 (* Copyright (c) 2008, Adam Chlipala
adamc@26 2 * All rights reserved.
adamc@26 3 *
adamc@26 4 * Redistribution and use in source and binary forms, with or without
adamc@26 5 * modification, are permitted provided that the following conditions are met:
adamc@26 6 *
adamc@26 7 * - Redistributions of source code must retain the above copyright notice,
adamc@26 8 * this list of conditions and the following disclaimer.
adamc@26 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@26 10 * this list of conditions and the following disclaimer in the documentation
adamc@26 11 * and/or other materials provided with the distribution.
adamc@26 12 * - The names of contributors may not be used to endorse or promote products
adamc@26 13 * derived from this software without specific prior written permission.
adamc@26 14 *
adamc@26 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@26 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@26 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@26 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@26 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@26 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@26 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@26 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@26 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@26 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@26 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@26 26 *)
adamc@26 27
adamc@26 28 structure MonoUtil :> MONO_UTIL = struct
adamc@26 29
adamc@26 30 open Mono
adamc@26 31
adamc@26 32 structure S = Search
adamc@26 33
adamc@26 34 structure Typ = struct
adamc@26 35
adamc@193 36 open Order
adamc@109 37
adamc@109 38 fun compare ((t1, _), (t2, _)) =
adamc@109 39 case (t1, t2) of
adamc@109 40 (TFun (d1, r1), TFun (d2, r2)) =>
adamc@109 41 join (compare (d1, d2), fn () => compare (r1, r2))
adamc@109 42 | (TRecord xts1, TRecord xts2) =>
adamc@109 43 let
adamc@109 44 val xts1 = sortFields xts1
adamc@109 45 val xts2 = sortFields xts2
adamc@109 46 in
adamc@109 47 joinL compareFields (xts1, xts2)
adamc@109 48 end
adamc@196 49 | (TDatatype (n1, _), TDatatype (n2, _)) => Int.compare (n1, n2)
adamc@109 50 | (TFfi (m1, x1), TFfi (m2, x2)) => join (String.compare (m1, m2), fn () => String.compare (x1, x2))
adamc@109 51
adamc@109 52 | (TFun _, _) => LESS
adamc@109 53 | (_, TFun _) => GREATER
adamc@109 54
adamc@109 55 | (TRecord _, _) => LESS
adamc@109 56 | (_, TRecord _) => GREATER
adamc@109 57
adamc@168 58 | (TDatatype _, _) => LESS
adamc@168 59 | (_, TDatatype _) => GREATER
adamc@109 60
adamc@109 61 and compareFields ((x1, t1), (x2, t2)) =
adamc@109 62 join (String.compare (x1, x2),
adamc@109 63 fn () => compare (t1, t2))
adamc@109 64
adamc@109 65 and sortFields xts = ListMergeSort.sort (fn (x, y) => compareFields (x, y) = GREATER) xts
adamc@109 66
adamc@26 67 fun mapfold fc =
adamc@26 68 let
adamc@26 69 fun mft c acc =
adamc@26 70 S.bindP (mft' c acc, fc)
adamc@26 71
adamc@26 72 and mft' (cAll as (c, loc)) =
adamc@26 73 case c of
adamc@26 74 TFun (t1, t2) =>
adamc@26 75 S.bind2 (mft t1,
adamc@26 76 fn t1' =>
adamc@26 77 S.map2 (mft t2,
adamc@26 78 fn t2' =>
adamc@26 79 (TFun (t1', t2'), loc)))
adamc@26 80 | TRecord xts =>
adamc@26 81 S.map2 (ListUtil.mapfold (fn (x, t) =>
adamc@26 82 S.map2 (mft t,
adamc@26 83 fn t' =>
adamc@26 84 (x, t')))
adamc@26 85 xts,
adamc@26 86 fn xts' => (TRecord xts', loc))
adamc@168 87 | TDatatype _ => S.return2 cAll
adamc@51 88 | TFfi _ => S.return2 cAll
adamc@26 89 in
adamc@26 90 mft
adamc@26 91 end
adamc@26 92
adamc@26 93 fun map typ c =
adamc@26 94 case mapfold (fn c => fn () => S.Continue (typ c, ())) c () of
adamc@26 95 S.Return () => raise Fail "Mono_util.Typ.map"
adamc@26 96 | S.Continue (c, ()) => c
adamc@26 97
adamc@26 98 fun fold typ s c =
adamc@26 99 case mapfold (fn c => fn s => S.Continue (c, typ (c, s))) c s of
adamc@26 100 S.Continue (_, s) => s
adamc@26 101 | S.Return _ => raise Fail "MonoUtil.Typ.fold: Impossible"
adamc@26 102
adamc@26 103 fun exists typ k =
adamc@26 104 case mapfold (fn c => fn () =>
adamc@26 105 if typ c then
adamc@26 106 S.Return ()
adamc@26 107 else
adamc@26 108 S.Continue (c, ())) k () of
adamc@26 109 S.Return _ => true
adamc@26 110 | S.Continue _ => false
adamc@26 111
adamc@26 112 end
adamc@26 113
adamc@26 114 structure Exp = struct
adamc@26 115
adamc@26 116 datatype binder =
adamc@168 117 Datatype of string * int * (string * int * typ option) list
adamc@26 118 | RelE of string * typ
adamc@109 119 | NamedE of string * int * typ * exp option * string
adamc@26 120
adamc@26 121 fun mapfoldB {typ = fc, exp = fe, bind} =
adamc@26 122 let
adamc@26 123 val mft = Typ.mapfold fc
adamc@26 124
adamc@26 125 fun mfe ctx e acc =
adamc@26 126 S.bindP (mfe' ctx e acc, fe ctx)
adamc@26 127
adamc@26 128 and mfe' ctx (eAll as (e, loc)) =
adamc@26 129 case e of
adamc@26 130 EPrim _ => S.return2 eAll
adamc@26 131 | ERel _ => S.return2 eAll
adamc@26 132 | ENamed _ => S.return2 eAll
adamc@188 133 | ECon (_, _, NONE) => S.return2 eAll
adamc@188 134 | ECon (dk, n, SOME e) =>
adamc@178 135 S.map2 (mfe ctx e,
adamc@178 136 fn e' =>
adamc@188 137 (ECon (dk, n, SOME e'), loc))
adamc@51 138 | EFfi _ => S.return2 eAll
adamc@51 139 | EFfiApp (m, x, es) =>
adamc@51 140 S.map2 (ListUtil.mapfold (fn e => mfe ctx e) es,
adamc@51 141 fn es' =>
adamc@51 142 (EFfiApp (m, x, es'), loc))
adamc@26 143 | EApp (e1, e2) =>
adamc@26 144 S.bind2 (mfe ctx e1,
adamc@26 145 fn e1' =>
adamc@26 146 S.map2 (mfe ctx e2,
adamc@26 147 fn e2' =>
adamc@26 148 (EApp (e1', e2'), loc)))
adamc@26 149 | EAbs (x, dom, ran, e) =>
adamc@26 150 S.bind2 (mft dom,
adamc@26 151 fn dom' =>
adamc@26 152 S.bind2 (mft ran,
adamc@26 153 fn ran' =>
adamc@26 154 S.map2 (mfe (bind (ctx, RelE (x, dom'))) e,
adamc@26 155 fn e' =>
adamc@26 156 (EAbs (x, dom', ran', e'), loc))))
adamc@26 157
adamc@26 158 | ERecord xes =>
adamc@29 159 S.map2 (ListUtil.mapfold (fn (x, e, t) =>
adamc@29 160 S.bind2 (mfe ctx e,
adamc@26 161 fn e' =>
adamc@29 162 S.map2 (mft t,
adamc@29 163 fn t' =>
adamc@29 164 (x, e', t'))))
adamc@26 165 xes,
adamc@26 166 fn xes' =>
adamc@26 167 (ERecord xes', loc))
adamc@26 168 | EField (e, x) =>
adamc@26 169 S.map2 (mfe ctx e,
adamc@26 170 fn e' =>
adamc@26 171 (EField (e', x), loc))
adamc@94 172
adamc@182 173 | ECase (e, pes, {disc, result}) =>
adamc@178 174 S.bind2 (mfe ctx e,
adamc@178 175 fn e' =>
adamc@178 176 S.bind2 (ListUtil.mapfold (fn (p, e) =>
adamc@179 177 let
adamc@179 178 fun pb ((p, _), ctx) =
adamc@179 179 case p of
adamc@179 180 PWild => ctx
adamc@182 181 | PVar (x, t) => bind (ctx, RelE (x, t))
adamc@179 182 | PPrim _ => ctx
adamc@188 183 | PCon (_, _, NONE) => ctx
adamc@188 184 | PCon (_, _, SOME p) => pb (p, ctx)
adamc@182 185 | PRecord xps => foldl (fn ((_, p, _), ctx) =>
adamc@179 186 pb (p, ctx)) ctx xps
adamc@179 187 in
adamc@179 188 S.map2 (mfe (pb (p, ctx)) e,
adamc@179 189 fn e' => (p, e'))
adamc@179 190 end) pes,
adamc@178 191 fn pes' =>
adamc@182 192 S.bind2 (mft disc,
adamc@182 193 fn disc' =>
adamc@182 194 S.map2 (mft result,
adamc@182 195 fn result' =>
adamc@182 196 (ECase (e', pes', {disc = disc', result = result'}), loc)))))
adamc@178 197
adamc@94 198 | EStrcat (e1, e2) =>
adamc@94 199 S.bind2 (mfe ctx e1,
adamc@94 200 fn e1' =>
adamc@94 201 S.map2 (mfe ctx e2,
adamc@94 202 fn e2' =>
adamc@94 203 (EStrcat (e1', e2'), loc)))
adamc@102 204
adamc@102 205 | EWrite e =>
adamc@102 206 S.map2 (mfe ctx e,
adamc@102 207 fn e' =>
adamc@102 208 (EWrite e', loc))
adamc@106 209
adamc@106 210 | ESeq (e1, e2) =>
adamc@106 211 S.bind2 (mfe ctx e1,
adamc@106 212 fn e1' =>
adamc@106 213 S.map2 (mfe ctx e2,
adamc@106 214 fn e2' =>
adamc@106 215 (ESeq (e1', e2'), loc)))
adamc@111 216
adamc@111 217 | EClosure (n, es) =>
adamc@111 218 S.map2 (ListUtil.mapfold (mfe ctx) es,
adamc@111 219 fn es' =>
adamc@111 220 (EClosure (n, es'), loc))
adamc@26 221 in
adamc@26 222 mfe
adamc@26 223 end
adamc@26 224
adamc@26 225 fun mapfold {typ = fc, exp = fe} =
adamc@26 226 mapfoldB {typ = fc,
adamc@26 227 exp = fn () => fe,
adamc@26 228 bind = fn ((), _) => ()} ()
adamc@26 229
adamc@26 230 fun mapB {typ, exp, bind} ctx e =
adamc@26 231 case mapfoldB {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 232 exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
adamc@26 233 bind = bind} ctx e () of
adamc@26 234 S.Continue (e, ()) => e
adamc@26 235 | S.Return _ => raise Fail "MonoUtil.Exp.mapB: Impossible"
adamc@26 236
adamc@26 237 fun map {typ, exp} e =
adamc@26 238 case mapfold {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 239 exp = fn e => fn () => S.Continue (exp e, ())} e () of
adamc@26 240 S.Return () => raise Fail "Mono_util.Exp.map"
adamc@26 241 | S.Continue (e, ()) => e
adamc@26 242
adamc@26 243 fun fold {typ, exp} s e =
adamc@26 244 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 245 exp = fn e => fn s => S.Continue (e, exp (e, s))} e s of
adamc@26 246 S.Continue (_, s) => s
adamc@26 247 | S.Return _ => raise Fail "MonoUtil.Exp.fold: Impossible"
adamc@26 248
adamc@26 249 fun exists {typ, exp} k =
adamc@26 250 case mapfold {typ = fn c => fn () =>
adamc@26 251 if typ c then
adamc@26 252 S.Return ()
adamc@26 253 else
adamc@26 254 S.Continue (c, ()),
adamc@26 255 exp = fn e => fn () =>
adamc@26 256 if exp e then
adamc@26 257 S.Return ()
adamc@26 258 else
adamc@26 259 S.Continue (e, ())} k () of
adamc@26 260 S.Return _ => true
adamc@26 261 | S.Continue _ => false
adamc@26 262
adamc@26 263 end
adamc@26 264
adamc@26 265 structure Decl = struct
adamc@26 266
adamc@26 267 datatype binder = datatype Exp.binder
adamc@26 268
adamc@26 269 fun mapfoldB {typ = fc, exp = fe, decl = fd, bind} =
adamc@26 270 let
adamc@26 271 val mft = Typ.mapfold fc
adamc@26 272
adamc@26 273 val mfe = Exp.mapfoldB {typ = fc, exp = fe, bind = bind}
adamc@26 274
adamc@26 275 fun mfd ctx d acc =
adamc@26 276 S.bindP (mfd' ctx d acc, fd ctx)
adamc@26 277
adamc@26 278 and mfd' ctx (dAll as (d, loc)) =
adamc@26 279 case d of
adamc@164 280 DDatatype (x, n, xncs) =>
adamc@164 281 S.map2 (ListUtil.mapfold (fn (x, n, c) =>
adamc@164 282 case c of
adamc@164 283 NONE => S.return2 (x, n, c)
adamc@164 284 | SOME c =>
adamc@164 285 S.map2 (mft c,
adamc@164 286 fn c' => (x, n, SOME c'))) xncs,
adamc@164 287 fn xncs' =>
adamc@164 288 (DDatatype (x, n, xncs'), loc))
adamc@164 289 | DVal vi =>
adamc@126 290 S.map2 (mfvi ctx vi,
adamc@126 291 fn vi' =>
adamc@126 292 (DVal vi', loc))
adamc@126 293 | DValRec vis =>
adamc@196 294 let
adamc@196 295 val ctx' = foldl (fn ((x, n, t, _, s), ctx') => bind (ctx', NamedE (x, n, t, NONE, s))) ctx vis
adamc@196 296 in
adamc@196 297 S.map2 (ListUtil.mapfold (mfvi ctx') vis,
adamc@196 298 fn vis' =>
adamc@196 299 (DValRec vis', loc))
adamc@196 300 end
adamc@144 301 | DExport (ek, s, n, ts) =>
adamc@120 302 S.map2 (ListUtil.mapfold mft ts,
adamc@120 303 fn ts' =>
adamc@144 304 (DExport (ek, s, n, ts'), loc))
adamc@126 305
adamc@126 306 and mfvi ctx (x, n, t, e, s) =
adamc@126 307 S.bind2 (mft t,
adamc@126 308 fn t' =>
adamc@126 309 S.map2 (mfe ctx e,
adamc@126 310 fn e' =>
adamc@126 311 (x, n, t', e', s)))
adamc@26 312 in
adamc@26 313 mfd
adamc@26 314 end
adamc@26 315
adamc@26 316 fun mapfold {typ = fc, exp = fe, decl = fd} =
adamc@26 317 mapfoldB {typ = fc,
adamc@26 318 exp = fn () => fe,
adamc@26 319 decl = fn () => fd,
adamc@26 320 bind = fn ((), _) => ()} ()
adamc@26 321
adamc@26 322 fun fold {typ, exp, decl} s d =
adamc@26 323 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 324 exp = fn e => fn s => S.Continue (e, exp (e, s)),
adamc@26 325 decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
adamc@26 326 S.Continue (_, s) => s
adamc@26 327 | S.Return _ => raise Fail "MonoUtil.Decl.fold: Impossible"
adamc@26 328
adamc@26 329 end
adamc@26 330
adamc@26 331 structure File = struct
adamc@26 332
adamc@26 333 datatype binder = datatype Exp.binder
adamc@26 334
adamc@26 335 fun mapfoldB (all as {bind, ...}) =
adamc@26 336 let
adamc@26 337 val mfd = Decl.mapfoldB all
adamc@26 338
adamc@26 339 fun mff ctx ds =
adamc@26 340 case ds of
adamc@26 341 nil => S.return2 nil
adamc@26 342 | d :: ds' =>
adamc@26 343 S.bind2 (mfd ctx d,
adamc@26 344 fn d' =>
adamc@26 345 let
adamc@100 346 val ctx' =
adamc@26 347 case #1 d' of
adamc@164 348 DDatatype (x, n, xncs) =>
adamc@164 349 let
adamc@168 350 val ctx = bind (ctx, Datatype (x, n, xncs))
adamc@198 351 val t = (TDatatype (n, ref (ElabUtil.classifyDatatype xncs, xncs)), #2 d')
adamc@164 352 in
adamc@164 353 foldl (fn ((x, n, to), ctx) =>
adamc@164 354 let
adamc@164 355 val t = case to of
adamc@164 356 NONE => t
adamc@164 357 | SOME t' => (TFun (t', t), #2 d')
adamc@164 358 in
adamc@164 359 bind (ctx, NamedE (x, n, t, NONE, ""))
adamc@164 360 end)
adamc@164 361 ctx xncs
adamc@164 362 end
adamc@164 363 | DVal (x, n, t, e, s) => bind (ctx, NamedE (x, n, t, SOME e, s))
adamc@126 364 | DValRec vis => foldl (fn ((x, n, t, e, s), ctx) =>
adamc@196 365 bind (ctx, NamedE (x, n, t, NONE, s))) ctx vis
adamc@109 366 | DExport _ => ctx
adamc@26 367 in
adamc@26 368 S.map2 (mff ctx' ds',
adamc@26 369 fn ds' =>
adamc@26 370 d' :: ds')
adamc@26 371 end)
adamc@26 372 in
adamc@26 373 mff
adamc@26 374 end
adamc@26 375
adamc@26 376 fun mapfold {typ = fc, exp = fe, decl = fd} =
adamc@26 377 mapfoldB {typ = fc,
adamc@26 378 exp = fn () => fe,
adamc@26 379 decl = fn () => fd,
adamc@26 380 bind = fn ((), _) => ()} ()
adamc@26 381
adamc@26 382 fun mapB {typ, exp, decl, bind} ctx ds =
adamc@26 383 case mapfoldB {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 384 exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
adamc@26 385 decl = fn ctx => fn d => fn () => S.Continue (decl ctx d, ()),
adamc@26 386 bind = bind} ctx ds () of
adamc@26 387 S.Continue (ds, ()) => ds
adamc@26 388 | S.Return _ => raise Fail "MonoUtil.File.mapB: Impossible"
adamc@26 389
adamc@96 390 fun map {typ, exp, decl} e =
adamc@96 391 case mapfold {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@96 392 exp = fn e => fn () => S.Continue (exp e, ()),
adamc@96 393 decl = fn d => fn () => S.Continue (decl d, ())} e () of
adamc@96 394 S.Return () => raise Fail "Mono_util.File.map"
adamc@96 395 | S.Continue (e, ()) => e
adamc@96 396
adamc@26 397 fun fold {typ, exp, decl} s d =
adamc@26 398 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 399 exp = fn e => fn s => S.Continue (e, exp (e, s)),
adamc@26 400 decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
adamc@26 401 S.Continue (_, s) => s
adamc@26 402 | S.Return _ => raise Fail "MonoUtil.File.fold: Impossible"
adamc@26 403
adamc@26 404 end
adamc@26 405
adamc@26 406 end