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Explifying (non-mutual) 'val rec'
author Adam Chlipala <adamc@hcoop.net>
date Thu, 17 Jul 2008 10:13:18 -0400
parents 813e5a52063d
children 80ac94b54e41
rev   line source
adamc@38 1 (* Copyright (c) 2008, Adam Chlipala
adamc@38 2 * All rights reserved.
adamc@38 3 *
adamc@38 4 * Redistribution and use in source and binary forms, with or without
adamc@38 5 * modification, are permitted provided that the following conditions are met:
adamc@38 6 *
adamc@38 7 * - Redistributions of source code must retain the above copyright notice,
adamc@38 8 * this list of conditions and the following disclaimer.
adamc@38 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@38 10 * this list of conditions and the following disclaimer in the documentation
adamc@38 11 * and/or other materials provided with the distribution.
adamc@38 12 * - The names of contributors may not be used to endorse or promote products
adamc@38 13 * derived from this software without specific prior written permission.
adamc@38 14 *
adamc@38 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@38 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@38 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@38 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@38 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@38 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@38 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@38 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@38 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@38 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@38 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@38 26 *)
adamc@38 27
adamc@38 28 (* Pretty-printing elaborated Laconic/Web *)
adamc@38 29
adamc@38 30 structure ExplPrint :> EXPL_PRINT = struct
adamc@38 31
adamc@38 32 open Print.PD
adamc@38 33 open Print
adamc@38 34
adamc@38 35 open Expl
adamc@38 36
adamc@38 37 structure E = ExplEnv
adamc@38 38
adamc@38 39 val debug = ref false
adamc@38 40
adamc@38 41 fun p_kind' par (k, _) =
adamc@38 42 case k of
adamc@38 43 KType => string "Type"
adamc@38 44 | KArrow (k1, k2) => parenIf par (box [p_kind' true k1,
adamc@38 45 space,
adamc@38 46 string "->",
adamc@38 47 space,
adamc@38 48 p_kind k2])
adamc@38 49 | KName => string "Name"
adamc@38 50 | KRecord k => box [string "{", p_kind k, string "}"]
adamc@87 51 | KUnit => string "Unit"
adamc@38 52
adamc@38 53 and p_kind k = p_kind' false k
adamc@38 54
adamc@38 55 fun p_con' par env (c, _) =
adamc@38 56 case c of
adamc@38 57 TFun (t1, t2) => parenIf par (box [p_con' true env t1,
adamc@38 58 space,
adamc@38 59 string "->",
adamc@38 60 space,
adamc@38 61 p_con env t2])
adamc@38 62 | TCFun (x, k, c) => parenIf par (box [string x,
adamc@38 63 space,
adamc@38 64 string "::",
adamc@38 65 space,
adamc@38 66 p_kind k,
adamc@38 67 space,
adamc@38 68 string "->",
adamc@38 69 space,
adamc@38 70 p_con (E.pushCRel env x k) c])
adamc@38 71 | TRecord (CRecord (_, xcs), _) => box [string "{",
adamc@38 72 p_list (fn (x, c) =>
adamc@38 73 box [p_name env x,
adamc@38 74 space,
adamc@38 75 string ":",
adamc@38 76 space,
adamc@38 77 p_con env c]) xcs,
adamc@38 78 string "}"]
adamc@38 79 | TRecord c => box [string "$",
adamc@38 80 p_con' true env c]
adamc@38 81
adamc@38 82 | CRel n =>
adamc@38 83 if !debug then
adamc@38 84 string (#1 (E.lookupCRel env n) ^ "_" ^ Int.toString n)
adamc@38 85 else
adamc@38 86 string (#1 (E.lookupCRel env n))
adamc@38 87 | CNamed n =>
adamc@38 88 ((if !debug then
adamc@38 89 string (#1 (E.lookupCNamed env n) ^ "__" ^ Int.toString n)
adamc@38 90 else
adamc@38 91 string (#1 (E.lookupCNamed env n)))
adamc@38 92 handle E.UnboundNamed _ => string ("UNBOUND_NAMED" ^ Int.toString n))
adamc@38 93 | CModProj (m1, ms, x) =>
adamc@38 94 let
adamc@109 95 val m1x = #1 (E.lookupStrNamed env m1)
adamc@109 96 handle E.UnboundNamed _ => "UNBOUND"
adamc@38 97
adamc@38 98 val m1s = if !debug then
adamc@38 99 m1x ^ "__" ^ Int.toString m1
adamc@38 100 else
adamc@38 101 m1x
adamc@38 102 in
adamc@38 103 p_list_sep (string ".") string (m1x :: ms @ [x])
adamc@38 104 end
adamc@38 105
adamc@38 106 | CApp (c1, c2) => parenIf par (box [p_con env c1,
adamc@38 107 space,
adamc@38 108 p_con' true env c2])
adamc@38 109 | CAbs (x, k, c) => parenIf par (box [string "fn",
adamc@38 110 space,
adamc@38 111 string x,
adamc@38 112 space,
adamc@38 113 string "::",
adamc@38 114 space,
adamc@38 115 p_kind k,
adamc@38 116 space,
adamc@38 117 string "=>",
adamc@38 118 space,
adamc@38 119 p_con (E.pushCRel env x k) c])
adamc@38 120
adamc@38 121 | CName s => box [string "#", string s]
adamc@38 122
adamc@38 123 | CRecord (k, xcs) =>
adamc@38 124 if !debug then
adamc@38 125 parenIf par (box [string "[",
adamc@38 126 p_list (fn (x, c) =>
adamc@38 127 box [p_con env x,
adamc@38 128 space,
adamc@38 129 string "=",
adamc@38 130 space,
adamc@38 131 p_con env c]) xcs,
adamc@38 132 string "]::",
adamc@38 133 p_kind k])
adamc@38 134 else
adamc@38 135 parenIf par (box [string "[",
adamc@38 136 p_list (fn (x, c) =>
adamc@38 137 box [p_con env x,
adamc@38 138 space,
adamc@38 139 string "=",
adamc@38 140 space,
adamc@38 141 p_con env c]) xcs,
adamc@38 142 string "]"])
adamc@38 143 | CConcat (c1, c2) => parenIf par (box [p_con' true env c1,
adamc@38 144 space,
adamc@38 145 string "++",
adamc@38 146 space,
adamc@38 147 p_con env c2])
adamc@68 148 | CFold _ => string "fold"
adamc@87 149 | CUnit => string "()"
adamc@38 150
adamc@38 151 and p_con env = p_con' false env
adamc@38 152
adamc@38 153 and p_name env (all as (c, _)) =
adamc@38 154 case c of
adamc@38 155 CName s => string s
adamc@38 156 | _ => p_con env all
adamc@38 157
adamc@38 158 fun p_exp' par env (e, _) =
adamc@38 159 case e of
adamc@38 160 EPrim p => Prim.p_t p
adamc@38 161 | ERel n =>
adamc@38 162 if !debug then
adamc@38 163 string (#1 (E.lookupERel env n) ^ "_" ^ Int.toString n)
adamc@38 164 else
adamc@38 165 string (#1 (E.lookupERel env n))
adamc@38 166 | ENamed n =>
adamc@38 167 if !debug then
adamc@38 168 string (#1 (E.lookupENamed env n) ^ "__" ^ Int.toString n)
adamc@38 169 else
adamc@38 170 string (#1 (E.lookupENamed env n))
adamc@38 171 | EModProj (m1, ms, x) =>
adamc@38 172 let
adamc@38 173 val (m1x, sgn) = E.lookupStrNamed env m1
adamc@38 174
adamc@38 175 val m1s = if !debug then
adamc@38 176 m1x ^ "__" ^ Int.toString m1
adamc@38 177 else
adamc@38 178 m1x
adamc@38 179 in
adamc@38 180 p_list_sep (string ".") string (m1x :: ms @ [x])
adamc@38 181 end
adamc@38 182
adamc@38 183 | EApp (e1, e2) => parenIf par (box [p_exp env e1,
adamc@38 184 space,
adamc@38 185 p_exp' true env e2])
adamc@38 186 | EAbs (x, t, _, e) => parenIf par (box [string "fn",
adamc@38 187 space,
adamc@38 188 string x,
adamc@38 189 space,
adamc@38 190 string ":",
adamc@38 191 space,
adamc@38 192 p_con env t,
adamc@38 193 space,
adamc@38 194 string "=>",
adamc@38 195 space,
adamc@38 196 p_exp (E.pushERel env x t) e])
adamc@38 197 | ECApp (e, c) => parenIf par (box [p_exp env e,
adamc@38 198 space,
adamc@38 199 string "[",
adamc@38 200 p_con env c,
adamc@38 201 string "]"])
adamc@38 202 | ECAbs (x, k, e) => parenIf par (box [string "fn",
adamc@38 203 space,
adamc@38 204 string x,
adamc@38 205 space,
adamc@38 206 string "::",
adamc@38 207 space,
adamc@38 208 p_kind k,
adamc@38 209 space,
adamc@38 210 string "=>",
adamc@38 211 space,
adamc@38 212 p_exp (E.pushCRel env x k) e])
adamc@38 213
adamc@38 214 | ERecord xes => box [string "{",
adamc@38 215 p_list (fn (x, e, _) =>
adamc@38 216 box [p_name env x,
adamc@38 217 space,
adamc@38 218 string "=",
adamc@38 219 space,
adamc@38 220 p_exp env e]) xes,
adamc@38 221 string "}"]
adamc@38 222 | EField (e, c, {field, rest}) =>
adamc@38 223 if !debug then
adamc@38 224 box [p_exp' true env e,
adamc@38 225 string ".",
adamc@38 226 p_con' true env c,
adamc@38 227 space,
adamc@38 228 string "[",
adamc@38 229 p_con env field,
adamc@38 230 space,
adamc@38 231 string " in ",
adamc@38 232 space,
adamc@38 233 p_con env rest,
adamc@38 234 string "]"]
adamc@38 235 else
adamc@38 236 box [p_exp' true env e,
adamc@38 237 string ".",
adamc@38 238 p_con' true env c]
adamc@72 239 | EFold _ => string "fold"
adamc@38 240
adamc@109 241 | EWrite e => box [string "write(",
adamc@109 242 p_exp env e,
adamc@109 243 string ")"]
adamc@109 244
adamc@38 245 and p_exp env = p_exp' false env
adamc@38 246
adamc@38 247 fun p_named x n =
adamc@38 248 if !debug then
adamc@38 249 box [string x,
adamc@38 250 string "__",
adamc@38 251 string (Int.toString n)]
adamc@38 252 else
adamc@38 253 string x
adamc@38 254
adamc@38 255 fun p_sgn_item env (sgi, _) =
adamc@38 256 case sgi of
adamc@38 257 SgiConAbs (x, n, k) => box [string "con",
adamc@38 258 space,
adamc@38 259 p_named x n,
adamc@38 260 space,
adamc@38 261 string "::",
adamc@38 262 space,
adamc@38 263 p_kind k]
adamc@38 264 | SgiCon (x, n, k, c) => box [string "con",
adamc@38 265 space,
adamc@38 266 p_named x n,
adamc@38 267 space,
adamc@38 268 string "::",
adamc@38 269 space,
adamc@38 270 p_kind k,
adamc@38 271 space,
adamc@38 272 string "=",
adamc@38 273 space,
adamc@38 274 p_con env c]
adamc@38 275 | SgiVal (x, n, c) => box [string "val",
adamc@38 276 space,
adamc@38 277 p_named x n,
adamc@38 278 space,
adamc@38 279 string ":",
adamc@38 280 space,
adamc@38 281 p_con env c]
adamc@38 282 | SgiStr (x, n, sgn) => box [string "structure",
adamc@38 283 space,
adamc@38 284 p_named x n,
adamc@38 285 space,
adamc@38 286 string ":",
adamc@38 287 space,
adamc@38 288 p_sgn env sgn]
adamc@64 289 | SgiSgn (x, n, sgn) => box [string "signature",
adamc@64 290 space,
adamc@64 291 p_named x n,
adamc@64 292 space,
adamc@64 293 string "=",
adamc@64 294 space,
adamc@64 295 p_sgn env sgn]
adamc@38 296
adamc@38 297 and p_sgn env (sgn, _) =
adamc@38 298 case sgn of
adamc@38 299 SgnConst sgis => box [string "sig",
adamc@38 300 newline,
adamc@38 301 let
adamc@38 302 val (psgis, _) = ListUtil.foldlMap (fn (sgi, env) =>
adamc@38 303 (p_sgn_item env sgi,
adamc@38 304 E.sgiBinds env sgi))
adamc@38 305 env sgis
adamc@38 306 in
adamc@38 307 p_list_sep newline (fn x => x) psgis
adamc@38 308 end,
adamc@38 309 newline,
adamc@38 310 string "end"]
adamc@38 311 | SgnVar n => string (#1 (E.lookupSgnNamed env n))
adamc@45 312 | SgnFun (x, n, sgn, sgn') => box [string "functor",
adamc@45 313 space,
adamc@45 314 string "(",
adamc@45 315 string x,
adamc@45 316 space,
adamc@45 317 string ":",
adamc@45 318 space,
adamc@45 319 p_sgn env sgn,
adamc@45 320 string ")",
adamc@45 321 space,
adamc@45 322 string ":",
adamc@45 323 space,
adamc@45 324 p_sgn (E.pushStrNamed env x n sgn) sgn']
adamc@45 325 | SgnWhere (sgn, x, c) => box [p_sgn env sgn,
adamc@45 326 space,
adamc@45 327 string "where",
adamc@45 328 space,
adamc@45 329 string "con",
adamc@45 330 space,
adamc@45 331 string x,
adamc@45 332 space,
adamc@45 333 string "=",
adamc@45 334 space,
adamc@45 335 p_con env c]
adamc@64 336 | SgnProj (m1, ms, x) =>
adamc@64 337 let
adamc@64 338 val (m1x, sgn) = E.lookupStrNamed env m1
adamc@64 339
adamc@64 340 val m1s = if !debug then
adamc@64 341 m1x ^ "__" ^ Int.toString m1
adamc@64 342 else
adamc@64 343 m1x
adamc@64 344 in
adamc@64 345 p_list_sep (string ".") string (m1x :: ms @ [x])
adamc@64 346 end
adamc@38 347
adamc@124 348 fun p_vali env (x, n, t, e) = box [p_named x n,
adamc@124 349 space,
adamc@124 350 string ":",
adamc@124 351 space,
adamc@124 352 p_con env t,
adamc@124 353 space,
adamc@124 354 string "=",
adamc@124 355 space,
adamc@124 356 p_exp env e]
adamc@124 357
adamc@124 358 fun p_decl env (dAll as (d, _) : decl) =
adamc@38 359 case d of
adamc@38 360 DCon (x, n, k, c) => box [string "con",
adamc@38 361 space,
adamc@38 362 p_named x n,
adamc@38 363 space,
adamc@38 364 string "::",
adamc@38 365 space,
adamc@38 366 p_kind k,
adamc@38 367 space,
adamc@38 368 string "=",
adamc@38 369 space,
adamc@38 370 p_con env c]
adamc@124 371 | DVal vi => box [string "val",
adamc@124 372 space,
adamc@124 373 p_vali env vi]
adamc@124 374 | DValRec vis =>
adamc@124 375 let
adamc@124 376 val env = E.declBinds env dAll
adamc@124 377 in
adamc@124 378 box [string "val",
adamc@124 379 space,
adamc@124 380 string "rec",
adamc@124 381 space,
adamc@124 382 p_list_sep (box [newline, string "and", space]) (p_vali env) vis]
adamc@124 383 end
adamc@38 384
adamc@38 385 | DSgn (x, n, sgn) => box [string "signature",
adamc@38 386 space,
adamc@38 387 p_named x n,
adamc@38 388 space,
adamc@38 389 string "=",
adamc@38 390 space,
adamc@38 391 p_sgn env sgn]
adamc@38 392 | DStr (x, n, sgn, str) => box [string "structure",
adamc@38 393 space,
adamc@38 394 p_named x n,
adamc@38 395 space,
adamc@38 396 string ":",
adamc@38 397 space,
adamc@38 398 p_sgn env sgn,
adamc@38 399 space,
adamc@38 400 string "=",
adamc@38 401 space,
adamc@38 402 p_str env str]
adamc@48 403 | DFfiStr (x, n, sgn) => box [string "extern",
adamc@48 404 space,
adamc@48 405 string "structure",
adamc@48 406 space,
adamc@48 407 p_named x n,
adamc@48 408 space,
adamc@48 409 string ":",
adamc@48 410 space,
adamc@48 411 p_sgn env sgn]
adamc@109 412 | DExport (_, sgn, str) => box [string "export",
adamc@109 413 space,
adamc@109 414 p_str env str,
adamc@109 415 space,
adamc@109 416 string ":",
adamc@109 417 space,
adamc@109 418 p_sgn env sgn]
adamc@38 419
adamc@38 420 and p_str env (str, _) =
adamc@38 421 case str of
adamc@38 422 StrConst ds => box [string "struct",
adamc@38 423 newline,
adamc@38 424 p_file env ds,
adamc@38 425 newline,
adamc@38 426 string "end"]
adamc@38 427 | StrVar n => string (#1 (E.lookupStrNamed env n))
adamc@38 428 | StrProj (str, s) => box [p_str env str,
adamc@38 429 string ".",
adamc@38 430 string s]
adamc@45 431 | StrFun (x, n, sgn, sgn', str) =>
adamc@45 432 let
adamc@45 433 val env' = E.pushStrNamed env x n sgn
adamc@45 434 in
adamc@45 435 box [string "functor",
adamc@45 436 space,
adamc@45 437 string "(",
adamc@45 438 string x,
adamc@45 439 space,
adamc@45 440 string ":",
adamc@45 441 space,
adamc@45 442 p_sgn env sgn,
adamc@45 443 string ")",
adamc@45 444 space,
adamc@45 445 string ":",
adamc@45 446 space,
adamc@45 447 p_sgn env' sgn',
adamc@45 448 space,
adamc@45 449 string "=>",
adamc@45 450 space,
adamc@45 451 p_str env' str]
adamc@45 452 end
adamc@45 453 | StrApp (str1, str2) => box [p_str env str1,
adamc@45 454 string "(",
adamc@45 455 p_str env str2,
adamc@45 456 string ")"]
adamc@38 457
adamc@38 458 and p_file env file =
adamc@38 459 let
adamc@38 460 val (pds, _) = ListUtil.foldlMap (fn (d, env) =>
adamc@38 461 (p_decl env d,
adamc@38 462 E.declBinds env d))
adamc@38 463 env file
adamc@38 464 in
adamc@38 465 p_list_sep newline (fn x => x) pds
adamc@38 466 end
adamc@38 467
adamc@38 468 end