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annotate src/flat_util.sml @ 31:1c91c5e6840f

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author Adam Chlipala <adamc@hcoop.net>
date Thu, 12 Jun 2008 17:16:20 -0400
parents 537db4ee89f4
children 198172560b73
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 FlatUtil :> FLAT_UTIL = struct
adamc@26 29
adamc@26 30 open Flat
adamc@26 31
adamc@26 32 structure S = Search
adamc@26 33
adamc@26 34 structure Typ = struct
adamc@26 35
adamc@28 36 fun join (o1, o2) =
adamc@28 37 case o1 of
adamc@28 38 EQUAL => o2 ()
adamc@28 39 | v => v
adamc@28 40
adamc@28 41 fun joinL f (os1, os2) =
adamc@28 42 case (os1, os2) of
adamc@28 43 (nil, nil) => EQUAL
adamc@28 44 | (nil, _) => LESS
adamc@28 45 | (h1 :: t1, h2 :: t2) =>
adamc@28 46 join (f (h1, h2), fn () => joinL f (t1, t2))
adamc@28 47 | (_ :: _, nil) => GREATER
adamc@28 48
adamc@28 49 fun compare ((t1, _), (t2, _)) =
adamc@28 50 case (t1, t2) of
adamc@29 51 (TTop, TTop) => EQUAL
adamc@29 52 | (TFun (d1, r1), TFun (d2, r2)) =>
adamc@28 53 join (compare (d1, d2), fn () => compare (r1, r2))
adamc@28 54 | (TCode (d1, r1), TCode (d2, r2)) =>
adamc@28 55 join (compare (d1, d2), fn () => compare (r1, r2))
adamc@28 56 | (TRecord xts1, TRecord xts2) =>
adamc@28 57 let
adamc@28 58 val xts2 = sortFields xts1
adamc@28 59 val xts2 = sortFields xts2
adamc@28 60 in
adamc@28 61 joinL compareFields (xts1, xts2)
adamc@28 62 end
adamc@28 63 | (TNamed n1, TNamed n2) => Int.compare (n1, n2)
adamc@28 64
adamc@29 65 | (TTop, _) => LESS
adamc@29 66 | (_, TTop) => GREATER
adamc@29 67
adamc@28 68 | (TFun _, _) => LESS
adamc@28 69 | (_, TFun _) => GREATER
adamc@28 70
adamc@28 71 | (TCode _, _) => LESS
adamc@28 72 | (_, TCode _) => GREATER
adamc@28 73
adamc@28 74 | (TRecord _, _) => LESS
adamc@28 75 | (_, TRecord _) => GREATER
adamc@28 76
adamc@28 77 and compareFields ((x1, t1), (x2, t2)) =
adamc@28 78 join (String.compare (x1, x2),
adamc@28 79 fn () => compare (t1, t2))
adamc@28 80
adamc@28 81 and sortFields xts = ListMergeSort.sort (fn (x, y) => compareFields (x, y) = GREATER) xts
adamc@28 82
adamc@26 83 fun mapfold fc =
adamc@26 84 let
adamc@26 85 fun mft c acc =
adamc@26 86 S.bindP (mft' c acc, fc)
adamc@26 87
adamc@26 88 and mft' (cAll as (c, loc)) =
adamc@26 89 case c of
adamc@29 90 TTop => S.return2 cAll
adamc@29 91 | TFun (t1, t2) =>
adamc@26 92 S.bind2 (mft t1,
adamc@26 93 fn t1' =>
adamc@26 94 S.map2 (mft t2,
adamc@26 95 fn t2' =>
adamc@26 96 (TFun (t1', t2'), loc)))
adamc@26 97 | TCode (t1, t2) =>
adamc@26 98 S.bind2 (mft t1,
adamc@26 99 fn t1' =>
adamc@26 100 S.map2 (mft t2,
adamc@26 101 fn t2' =>
adamc@26 102 (TCode (t1', t2'), loc)))
adamc@26 103 | TRecord xts =>
adamc@26 104 S.map2 (ListUtil.mapfold (fn (x, t) =>
adamc@26 105 S.map2 (mft t,
adamc@26 106 fn t' =>
adamc@26 107 (x, t')))
adamc@26 108 xts,
adamc@26 109 fn xts' => (TRecord xts', loc))
adamc@26 110 | TNamed _ => S.return2 cAll
adamc@26 111 in
adamc@26 112 mft
adamc@26 113 end
adamc@26 114
adamc@26 115 fun map typ c =
adamc@26 116 case mapfold (fn c => fn () => S.Continue (typ c, ())) c () of
adamc@26 117 S.Return () => raise Fail "Flat_util.Typ.map"
adamc@26 118 | S.Continue (c, ()) => c
adamc@26 119
adamc@26 120 fun fold typ s c =
adamc@26 121 case mapfold (fn c => fn s => S.Continue (c, typ (c, s))) c s of
adamc@26 122 S.Continue (_, s) => s
adamc@26 123 | S.Return _ => raise Fail "FlatUtil.Typ.fold: Impossible"
adamc@26 124
adamc@26 125 fun exists typ k =
adamc@26 126 case mapfold (fn c => fn () =>
adamc@26 127 if typ c then
adamc@26 128 S.Return ()
adamc@26 129 else
adamc@26 130 S.Continue (c, ())) k () of
adamc@26 131 S.Return _ => true
adamc@26 132 | S.Continue _ => false
adamc@26 133
adamc@26 134 end
adamc@26 135
adamc@26 136 structure Exp = struct
adamc@26 137
adamc@26 138 datatype binder =
adamc@26 139 NamedT of string * int * typ option
adamc@26 140 | RelE of string * typ
adamc@26 141 | NamedE of string * int * typ * exp option
adamc@26 142
adamc@26 143 fun mapfoldB {typ = fc, exp = fe, bind} =
adamc@26 144 let
adamc@26 145 val mft = Typ.mapfold fc
adamc@26 146
adamc@26 147 fun mfe ctx e acc =
adamc@26 148 S.bindP (mfe' ctx e acc, fe ctx)
adamc@26 149
adamc@26 150 and mfe' ctx (eAll as (e, loc)) =
adamc@26 151 case e of
adamc@26 152 EPrim _ => S.return2 eAll
adamc@26 153 | ERel _ => S.return2 eAll
adamc@26 154 | ENamed _ => S.return2 eAll
adamc@26 155 | ECode _ => S.return2 eAll
adamc@26 156 | EApp (e1, e2) =>
adamc@26 157 S.bind2 (mfe ctx e1,
adamc@26 158 fn e1' =>
adamc@26 159 S.map2 (mfe ctx e2,
adamc@26 160 fn e2' =>
adamc@26 161 (EApp (e1', e2'), loc)))
adamc@26 162
adamc@26 163 | ERecord xes =>
adamc@29 164 S.map2 (ListUtil.mapfold (fn (x, e, t) =>
adamc@29 165 S.bind2 (mfe ctx e,
adamc@26 166 fn e' =>
adamc@29 167 S.map2 (mft t,
adamc@29 168 fn t' =>
adamc@29 169 (x, e', t'))))
adamc@26 170 xes,
adamc@26 171 fn xes' =>
adamc@26 172 (ERecord xes', loc))
adamc@26 173 | EField (e, x) =>
adamc@26 174 S.map2 (mfe ctx e,
adamc@26 175 fn e' =>
adamc@26 176 (EField (e', x), loc))
adamc@26 177
adamc@26 178 | ELet (xes, e) =>
adamc@29 179 S.bind2 (ListUtil.mapfold (fn (x, t, e) =>
adamc@29 180 S.bind2 (mft t,
adamc@29 181 fn t' =>
adamc@29 182 S.map2 (mfe ctx e,
adamc@29 183 fn e' =>
adamc@29 184 (x, t', e'))))
adamc@26 185 xes,
adamc@26 186 fn xes' =>
adamc@26 187 S.map2 (mfe ctx e,
adamc@26 188 fn e' =>
adamc@26 189 (ELet (xes', e'), loc)))
adamc@26 190 in
adamc@26 191 mfe
adamc@26 192 end
adamc@26 193
adamc@26 194 fun mapfold {typ = fc, exp = fe} =
adamc@26 195 mapfoldB {typ = fc,
adamc@26 196 exp = fn () => fe,
adamc@26 197 bind = fn ((), _) => ()} ()
adamc@26 198
adamc@26 199 fun mapB {typ, exp, bind} ctx e =
adamc@26 200 case mapfoldB {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 201 exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
adamc@26 202 bind = bind} ctx e () of
adamc@26 203 S.Continue (e, ()) => e
adamc@26 204 | S.Return _ => raise Fail "FlatUtil.Exp.mapB: Impossible"
adamc@26 205
adamc@26 206 fun map {typ, exp} e =
adamc@26 207 case mapfold {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 208 exp = fn e => fn () => S.Continue (exp e, ())} e () of
adamc@26 209 S.Return () => raise Fail "Flat_util.Exp.map"
adamc@26 210 | S.Continue (e, ()) => e
adamc@26 211
adamc@26 212 fun fold {typ, exp} s e =
adamc@26 213 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 214 exp = fn e => fn s => S.Continue (e, exp (e, s))} e s of
adamc@26 215 S.Continue (_, s) => s
adamc@26 216 | S.Return _ => raise Fail "FlatUtil.Exp.fold: Impossible"
adamc@26 217
adamc@26 218 fun exists {typ, exp} k =
adamc@26 219 case mapfold {typ = fn c => fn () =>
adamc@26 220 if typ c then
adamc@26 221 S.Return ()
adamc@26 222 else
adamc@26 223 S.Continue (c, ()),
adamc@26 224 exp = fn e => fn () =>
adamc@26 225 if exp e then
adamc@26 226 S.Return ()
adamc@26 227 else
adamc@26 228 S.Continue (e, ())} k () of
adamc@26 229 S.Return _ => true
adamc@26 230 | S.Continue _ => false
adamc@26 231
adamc@26 232 end
adamc@26 233
adamc@26 234 structure Decl = struct
adamc@26 235
adamc@26 236 datatype binder = datatype Exp.binder
adamc@26 237
adamc@26 238 fun mapfoldB {typ = fc, exp = fe, decl = fd, bind} =
adamc@26 239 let
adamc@26 240 val mft = Typ.mapfold fc
adamc@26 241
adamc@26 242 val mfe = Exp.mapfoldB {typ = fc, exp = fe, bind = bind}
adamc@26 243
adamc@26 244 fun mfd ctx d acc =
adamc@26 245 S.bindP (mfd' ctx d acc, fd ctx)
adamc@26 246
adamc@26 247 and mfd' ctx (dAll as (d, loc)) =
adamc@26 248 case d of
adamc@26 249 DVal (x, n, t, e) =>
adamc@26 250 S.bind2 (mft t,
adamc@26 251 fn t' =>
adamc@26 252 S.map2 (mfe ctx e,
adamc@26 253 fn e' =>
adamc@26 254 (DVal (x, n, t', e'), loc)))
adamc@26 255 | DFun (n, x, dom, ran, e) =>
adamc@26 256 S.bind2 (mft dom,
adamc@26 257 fn dom' =>
adamc@26 258 S.bind2 (mft ran,
adamc@26 259 fn ran' =>
adamc@26 260 S.map2 (mfe ctx e,
adamc@26 261 fn e' =>
adamc@26 262 (DFun (n, x, dom', ran', e'), loc))))
adamc@26 263 in
adamc@26 264 mfd
adamc@26 265 end
adamc@26 266
adamc@26 267 fun mapfold {typ = fc, exp = fe, decl = fd} =
adamc@26 268 mapfoldB {typ = fc,
adamc@26 269 exp = fn () => fe,
adamc@26 270 decl = fn () => fd,
adamc@26 271 bind = fn ((), _) => ()} ()
adamc@26 272
adamc@26 273 fun fold {typ, exp, decl} s d =
adamc@26 274 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 275 exp = fn e => fn s => S.Continue (e, exp (e, s)),
adamc@26 276 decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
adamc@26 277 S.Continue (_, s) => s
adamc@26 278 | S.Return _ => raise Fail "FlatUtil.Decl.fold: Impossible"
adamc@26 279
adamc@26 280 end
adamc@26 281
adamc@26 282 structure File = struct
adamc@26 283
adamc@26 284 datatype binder =
adamc@26 285 NamedT of string * int * typ option
adamc@26 286 | RelE of string * typ
adamc@26 287 | NamedE of string * int * typ * exp option
adamc@26 288 | F of int * string * Flat.typ * Flat.typ * Flat.exp
adamc@26 289
adamc@26 290 fun mapfoldB (all as {bind, ...}) =
adamc@26 291 let
adamc@26 292 val mfd = Decl.mapfoldB all
adamc@26 293
adamc@26 294 fun mff ctx ds =
adamc@26 295 case ds of
adamc@26 296 nil => S.return2 nil
adamc@26 297 | d :: ds' =>
adamc@26 298 S.bind2 (mfd ctx d,
adamc@26 299 fn d' =>
adamc@26 300 let
adamc@26 301 val b =
adamc@26 302 case #1 d' of
adamc@26 303 DVal (x, n, t, e) => NamedE (x, n, t, SOME e)
adamc@26 304 | DFun v => F v
adamc@26 305 val ctx' = bind (ctx, b)
adamc@26 306 in
adamc@26 307 S.map2 (mff ctx' ds',
adamc@26 308 fn ds' =>
adamc@26 309 d' :: ds')
adamc@26 310 end)
adamc@26 311 in
adamc@26 312 mff
adamc@26 313 end
adamc@26 314
adamc@26 315 fun mapfold {typ = fc, exp = fe, decl = fd} =
adamc@26 316 mapfoldB {typ = fc,
adamc@26 317 exp = fn () => fe,
adamc@26 318 decl = fn () => fd,
adamc@26 319 bind = fn ((), _) => ()} ()
adamc@26 320
adamc@26 321 fun mapB {typ, exp, decl, bind} ctx ds =
adamc@26 322 case mapfoldB {typ = fn c => fn () => S.Continue (typ c, ()),
adamc@26 323 exp = fn ctx => fn e => fn () => S.Continue (exp ctx e, ()),
adamc@26 324 decl = fn ctx => fn d => fn () => S.Continue (decl ctx d, ()),
adamc@26 325 bind = bind} ctx ds () of
adamc@26 326 S.Continue (ds, ()) => ds
adamc@26 327 | S.Return _ => raise Fail "FlatUtil.File.mapB: Impossible"
adamc@26 328
adamc@26 329 fun fold {typ, exp, decl} s d =
adamc@26 330 case mapfold {typ = fn c => fn s => S.Continue (c, typ (c, s)),
adamc@26 331 exp = fn e => fn s => S.Continue (e, exp (e, s)),
adamc@26 332 decl = fn d => fn s => S.Continue (d, decl (d, s))} d s of
adamc@26 333 S.Continue (_, s) => s
adamc@26 334 | S.Return _ => raise Fail "FlatUtil.File.fold: Impossible"
adamc@26 335
adamc@26 336 end
adamc@26 337
adamc@26 338 end