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annotate src/jscomp.sml @ 590:57f476c934da

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Injecting an int
author Adam Chlipala <adamc@hcoop.net>
date Thu, 01 Jan 2009 15:11:17 -0500
parents 102e81d975e3
children 8f8771f32909
rev   line source
adamc@567 1 (* Copyright (c) 2008, Adam Chlipala
adamc@567 2 * All rights reserved.
adamc@567 3 *
adamc@567 4 * Redistribution and use in source and binary forms, with or without
adamc@567 5 * modification, are permitted provided that the following conditions are met:
adamc@567 6 *
adamc@567 7 * - Redistributions of source code must retain the above copyright notice,
adamc@567 8 * this list of conditions and the following disclaimer.
adamc@567 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@567 10 * this list of conditions and the following disclaimer in the documentation
adamc@567 11 * and/or other materials provided with the distribution.
adamc@567 12 * - The names of contributors may not be used to endorse or promote products
adamc@567 13 * derived from this software without specific prior written permission.
adamc@567 14 *
adamc@567 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@567 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@567 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@567 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@567 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@567 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@567 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@567 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@567 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@567 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@567 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@567 26 *)
adamc@567 27
adamc@567 28 structure JsComp :> JSCOMP = struct
adamc@567 29
adamc@567 30 open Mono
adamc@567 31
adamc@567 32 structure EM = ErrorMsg
adamc@567 33 structure E = MonoEnv
adamc@567 34 structure U = MonoUtil
adamc@567 35
adamc@589 36 structure IS = IntBinarySet
adamc@589 37 structure IM = IntBinaryMap
adamc@589 38
adamc@572 39 val funcs = [(("Basis", "alert"), "alert"),
adamc@586 40 (("Basis", "htmlifyBool"), "bs"),
adamc@583 41 (("Basis", "htmlifyFloat"), "ts"),
adamc@582 42 (("Basis", "htmlifyInt"), "ts"),
adamc@574 43 (("Basis", "htmlifyString"), "escape"),
adamc@579 44 (("Basis", "new_client_source"), "sc"),
adamc@579 45 (("Basis", "set_client_source"), "sv")]
adamc@572 46
adamc@572 47 structure FM = BinaryMapFn(struct
adamc@572 48 type ord_key = string * string
adamc@572 49 fun compare ((m1, x1), (m2, x2)) =
adamc@572 50 Order.join (String.compare (m1, m2),
adamc@572 51 fn () => String.compare (x1, x2))
adamc@572 52 end)
adamc@572 53
adamc@572 54 val funcs = foldl (fn ((k, v), m) => FM.insert (m, k, v)) FM.empty funcs
adamc@572 55
adamc@572 56 fun ffi k = FM.find (funcs, k)
adamc@572 57
adamc@567 58 type state = {
adamc@567 59 decls : decl list,
adamc@589 60 script : string list,
adamc@589 61 included : IS.set
adamc@567 62 }
adamc@567 63
adamc@567 64 fun varDepth (e, _) =
adamc@567 65 case e of
adamc@567 66 EPrim _ => 0
adamc@567 67 | ERel _ => 0
adamc@567 68 | ENamed _ => 0
adamc@567 69 | ECon (_, _, NONE) => 0
adamc@567 70 | ECon (_, _, SOME e) => varDepth e
adamc@567 71 | ENone _ => 0
adamc@567 72 | ESome (_, e) => varDepth e
adamc@567 73 | EFfi _ => 0
adamc@567 74 | EFfiApp (_, _, es) => foldl Int.max 0 (map varDepth es)
adamc@567 75 | EApp (e1, e2) => Int.max (varDepth e1, varDepth e2)
adamc@567 76 | EAbs _ => 0
adamc@567 77 | EUnop (_, e) => varDepth e
adamc@567 78 | EBinop (_, e1, e2) => Int.max (varDepth e1, varDepth e2)
adamc@567 79 | ERecord xes => foldl Int.max 0 (map (fn (_, e, _) => varDepth e) xes)
adamc@567 80 | EField (e, _) => varDepth e
adamc@567 81 | ECase (e, pes, _) =>
adamc@567 82 foldl Int.max (varDepth e)
adamc@567 83 (map (fn (p, e) => E.patBindsN p + varDepth e) pes)
adamc@567 84 | EStrcat (e1, e2) => Int.max (varDepth e1, varDepth e2)
adamc@567 85 | EError (e, _) => varDepth e
adamc@567 86 | EWrite e => varDepth e
adamc@567 87 | ESeq (e1, e2) => Int.max (varDepth e1, varDepth e2)
adamc@567 88 | ELet (_, _, e1, e2) => Int.max (varDepth e1, 1 + varDepth e2)
adamc@567 89 | EClosure _ => 0
adamc@567 90 | EQuery _ => 0
adamc@567 91 | EDml _ => 0
adamc@567 92 | ENextval _ => 0
adamc@567 93 | EUnurlify _ => 0
adamc@567 94 | EJavaScript _ => 0
adamc@568 95 | ESignalReturn e => varDepth e
adamc@572 96 | ESignalBind (e1, e2) => Int.max (varDepth e1, varDepth e2)
adamc@574 97 | ESignalSource e => varDepth e
adamc@567 98
adamc@568 99 fun strcat loc es =
adamc@568 100 case es of
adamc@568 101 [] => (EPrim (Prim.String ""), loc)
adamc@568 102 | [x] => x
adamc@568 103 | x :: es' => (EStrcat (x, strcat loc es'), loc)
adamc@568 104
adamc@590 105 exception Unsupported of string * EM.span
adamc@590 106
adamc@589 107 fun process file =
adamc@567 108 let
adamc@589 109 val nameds = foldl (fn ((DVal (_, n, t, e, _), _), nameds) => IM.insert (nameds, n, e)
adamc@589 110 | ((DValRec vis, _), nameds) =>
adamc@589 111 foldl (fn ((_, n, _, e, _), nameds) => IM.insert (nameds, n, e))
adamc@589 112 nameds vis
adamc@589 113 | (_, nameds) => nameds)
adamc@589 114 IM.empty file
adamc@567 115
adamc@590 116 fun str loc s = (EPrim (Prim.String s), loc)
adamc@590 117
adamc@590 118 fun quoteExp loc (t : typ) e =
adamc@590 119 case #1 t of
adamc@590 120 TSource => strcat loc [str loc "s",
adamc@590 121 (EFfiApp ("Basis", "htmlifyInt", [e]), loc)]
adamc@590 122 | TRecord [] => str loc "null"
adamc@590 123
adamc@590 124 | TFfi ("Basis", "string") => e
adamc@590 125 | TFfi ("Basis", "int") => (EFfiApp ("Basis", "htmlifyInt", [e]), loc)
adamc@590 126
adamc@590 127 | _ => (EM.errorAt loc "Don't know how to embed type in JavaScript";
adamc@590 128 Print.prefaces "Can't embed" [("t", MonoPrint.p_typ MonoEnv.empty t)];
adamc@590 129 str loc "ERROR")
adamc@590 130
adamc@589 131 fun jsExp mode skip outer =
adamc@567 132 let
adamc@589 133 val len = length outer
adamc@567 134
adamc@589 135 fun jsE inner (e as (_, loc), st) =
adamc@589 136 let
adamc@590 137 val str = str loc
adamc@567 138
adamc@589 139 fun var n = Int.toString (len + inner - n - 1)
adamc@567 140
adamc@589 141 fun patCon pc =
adamc@589 142 case pc of
adamc@589 143 PConVar n => str (Int.toString n)
adamc@589 144 | PConFfi {mod = "Basis", con = "True", ...} => str "true"
adamc@589 145 | PConFfi {mod = "Basis", con = "False", ...} => str "false"
adamc@589 146 | PConFfi {con, ...} => str ("\"_" ^ con ^ "\"")
adamc@567 147
adamc@589 148 fun isNullable (t, _) =
adamc@589 149 case t of
adamc@589 150 TOption _ => true
adamc@589 151 | TRecord [] => true
adamc@589 152 | _ => false
adamc@568 153
adamc@590 154 fun unsupported s = raise Unsupported (s, loc)
adamc@577 155
adamc@589 156 val strcat = strcat loc
adamc@584 157
adamc@589 158 fun jsPrim p =
adamc@589 159 case p of
adamc@589 160 Prim.String s =>
adamc@589 161 str ("\""
adamc@589 162 ^ String.translate (fn #"'" =>
adamc@589 163 if mode = Attribute then
adamc@589 164 "\\047"
adamc@589 165 else
adamc@589 166 "'"
adamc@589 167 | #"\"" => "\\\""
adamc@589 168 | #"<" =>
adamc@589 169 if mode = Script then
adamc@589 170 "<"
adamc@589 171 else
adamc@589 172 "\\074"
adamc@589 173 | #"\\" => "\\\\"
adamc@589 174 | ch => String.str ch) s
adamc@589 175 ^ "\"")
adamc@589 176 | _ => str (Prim.toString p)
adamc@589 177
adamc@589 178 fun jsPat depth inner (p, _) succ fail =
adamc@589 179 case p of
adamc@589 180 PWild => succ
adamc@589 181 | PVar _ => strcat [str ("(_" ^ Int.toString (len + inner) ^ "=d"
adamc@589 182 ^ Int.toString depth ^ ","),
adamc@589 183 succ,
adamc@589 184 str ")"]
adamc@589 185 | PPrim p => strcat [str ("(d" ^ Int.toString depth ^ "=="),
adamc@589 186 jsPrim p,
adamc@589 187 str "?",
adamc@589 188 succ,
adamc@589 189 str ":",
adamc@589 190 fail,
adamc@589 191 str ")"]
adamc@589 192 | PCon (_, PConFfi {mod = "Basis", con = "True", ...}, NONE) =>
adamc@589 193 strcat [str ("(d" ^ Int.toString depth ^ "?"),
adamc@589 194 succ,
adamc@589 195 str ":",
adamc@589 196 fail,
adamc@589 197 str ")"]
adamc@589 198 | PCon (_, PConFfi {mod = "Basis", con = "False", ...}, NONE) =>
adamc@589 199 strcat [str ("(d" ^ Int.toString depth ^ "?"),
adamc@589 200 fail,
adamc@589 201 str ":",
adamc@589 202 succ,
adamc@589 203 str ")"]
adamc@589 204 | PCon (_, pc, NONE) =>
adamc@589 205 strcat [str ("(d" ^ Int.toString depth ^ "=="),
adamc@589 206 patCon pc,
adamc@589 207 str "?",
adamc@589 208 succ,
adamc@589 209 str ":",
adamc@589 210 fail,
adamc@589 211 str ")"]
adamc@589 212 | PCon (_, pc, SOME p) =>
adamc@589 213 strcat [str ("(d" ^ Int.toString depth ^ ".n=="),
adamc@589 214 patCon pc,
adamc@589 215 str ("?(d" ^ Int.toString depth ^ "=d" ^ Int.toString depth ^ ".v,"),
adamc@589 216 jsPat depth inner p succ fail,
adamc@589 217 str "):",
adamc@589 218 fail,
adamc@589 219 str ")"]
adamc@589 220 | PRecord xps =>
adamc@589 221 let
adamc@589 222 val (_, succ) = foldl
adamc@589 223 (fn ((x, p, _), (inner, succ)) =>
adamc@589 224 (inner + E.patBindsN p,
adamc@589 225 strcat [str ("(d" ^ Int.toString (depth+1) ^ "=d"
adamc@589 226 ^ Int.toString depth ^ "._" ^ x ^ ","),
adamc@589 227 jsPat (depth+1) inner p succ fail,
adamc@589 228 str ")"]))
adamc@589 229 (inner, succ) xps
adamc@589 230 in
adamc@589 231 succ
adamc@589 232 end
adamc@589 233 | PNone _ => strcat [str ("(d" ^ Int.toString depth ^ "?"),
adamc@589 234 fail,
adamc@589 235 str ":",
adamc@589 236 succ,
adamc@589 237 str ")"]
adamc@589 238 | PSome (_, p) => strcat [str ("(d" ^ Int.toString depth ^ "?"),
adamc@589 239 jsPat depth inner p succ fail,
adamc@589 240 str ":",
adamc@589 241 fail,
adamc@589 242 str ")"]
adamc@589 243
adamc@589 244 fun deStrcat (e, _) =
adamc@589 245 case e of
adamc@589 246 EPrim (Prim.String s) => s
adamc@589 247 | EStrcat (e1, e2) => deStrcat e1 ^ deStrcat e2
adamc@589 248 | _ => raise Fail "Jscomp: deStrcat"
adamc@590 249
adamc@590 250 val quoteExp = quoteExp loc
adamc@567 251 in
adamc@590 252 (*Print.prefaces "jsE" [("e", MonoPrint.p_exp MonoEnv.empty e)];*)
adamc@590 253
adamc@589 254 case #1 e of
adamc@589 255 EPrim p => (jsPrim p, st)
adamc@589 256 | ERel n =>
adamc@589 257 if n < inner then
adamc@589 258 (str ("_" ^ var n), st)
adamc@589 259 else
adamc@589 260 let
adamc@589 261 val n = n - inner
adamc@589 262 in
adamc@589 263 (quoteExp (List.nth (outer, n)) (ERel (n - skip), loc), st)
adamc@589 264 end
adamc@567 265
adamc@589 266 | ENamed n =>
adamc@589 267 let
adamc@589 268 val st =
adamc@589 269 if IS.member (#included st, n) then
adamc@589 270 st
adamc@589 271 else
adamc@589 272 case IM.find (nameds, n) of
adamc@589 273 NONE => raise Fail "Jscomp: Unbound ENamed"
adamc@589 274 | SOME e =>
adamc@589 275 let
adamc@589 276 val st = {decls = #decls st,
adamc@589 277 script = #script st,
adamc@589 278 included = IS.add (#included st, n)}
adamc@578 279
adamc@589 280 val (e, st) = jsExp mode skip [] 0 (e, st)
adamc@589 281 val e = deStrcat e
adamc@589 282
adamc@589 283 val sc = "_n" ^ Int.toString n ^ "=" ^ e ^ ";\n"
adamc@589 284 in
adamc@589 285 {decls = #decls st,
adamc@589 286 script = sc :: #script st,
adamc@589 287 included = #included st}
adamc@589 288 end
adamc@589 289 in
adamc@589 290 (str ("_n" ^ Int.toString n), st)
adamc@589 291 end
adamc@589 292
adamc@589 293 | ECon (_, pc, NONE) => (patCon pc, st)
adamc@589 294 | ECon (_, pc, SOME e) =>
adamc@589 295 let
adamc@589 296 val (s, st) = jsE inner (e, st)
adamc@589 297 in
adamc@589 298 (strcat [str "{n:",
adamc@589 299 patCon pc,
adamc@589 300 str ",v:",
adamc@589 301 s,
adamc@589 302 str "}"], st)
adamc@589 303 end
adamc@589 304 | ENone _ => (str "null", st)
adamc@589 305 | ESome (t, e) =>
adamc@572 306 let
adamc@572 307 val (e, st) = jsE inner (e, st)
adamc@572 308 in
adamc@589 309 (if isNullable t then
adamc@589 310 strcat [str "{v:", e, str "}"]
adamc@589 311 else
adamc@589 312 e, st)
adamc@589 313 end
adamc@589 314
adamc@589 315 | EFfi k =>
adamc@589 316 let
adamc@589 317 val name = case ffi k of
adamc@589 318 NONE => (EM.errorAt loc ("Unsupported FFI identifier " ^ #2 k
adamc@589 319 ^ " in JavaScript");
adamc@589 320 "ERROR")
adamc@589 321 | SOME s => s
adamc@589 322 in
adamc@589 323 (str name, st)
adamc@589 324 end
adamc@589 325 | EFfiApp (m, x, args) =>
adamc@589 326 let
adamc@589 327 val args =
adamc@589 328 case (m, x, args) of
adamc@589 329 ("Basis", "new_client_source", [(EJavaScript (_, e, _), _)]) => [e]
adamc@589 330 | ("Basis", "set_client_source", [e1, (EJavaScript (_, e2, _), _)]) => [e1, e2]
adamc@589 331 | _ => args
adamc@589 332
adamc@589 333 val name = case ffi (m, x) of
adamc@589 334 NONE => (EM.errorAt loc ("Unsupported FFI function "
adamc@589 335 ^ x ^ " in JavaScript");
adamc@589 336 "ERROR")
adamc@589 337 | SOME s => s
adamc@589 338 in
adamc@589 339 case args of
adamc@589 340 [] => (str (name ^ "()"), st)
adamc@589 341 | [e] =>
adamc@589 342 let
adamc@589 343 val (e, st) = jsE inner (e, st)
adamc@589 344 in
adamc@589 345 (strcat [str (name ^ "("),
adamc@589 346 e,
adamc@589 347 str ")"], st)
adamc@589 348 end
adamc@589 349 | e :: es =>
adamc@589 350 let
adamc@589 351 val (e, st) = jsE inner (e, st)
adamc@589 352 val (es, st) = ListUtil.foldlMapConcat
adamc@589 353 (fn (e, st) =>
adamc@589 354 let
adamc@589 355 val (e, st) = jsE inner (e, st)
adamc@589 356 in
adamc@589 357 ([str ",", e], st)
adamc@589 358 end)
adamc@589 359 st es
adamc@589 360 in
adamc@589 361 (strcat (str (name ^ "(")
adamc@589 362 :: e
adamc@589 363 :: es
adamc@589 364 @ [str ")"]), st)
adamc@589 365 end
adamc@589 366 end
adamc@589 367
adamc@589 368 | EApp (e1, e2) =>
adamc@589 369 let
adamc@589 370 val (e1, st) = jsE inner (e1, st)
adamc@589 371 val (e2, st) = jsE inner (e2, st)
adamc@589 372 in
adamc@589 373 (strcat [e1, str "(", e2, str ")"], st)
adamc@589 374 end
adamc@589 375 | EAbs (_, _, _, e) =>
adamc@589 376 let
adamc@589 377 val locals = List.tabulate
adamc@589 378 (varDepth e,
adamc@589 379 fn i => str ("var _" ^ Int.toString (len + inner + i + 1) ^ ";"))
adamc@589 380 val (e, st) = jsE (inner + 1) (e, st)
adamc@589 381 in
adamc@589 382 (strcat (str ("function(_"
adamc@589 383 ^ Int.toString (len + inner)
adamc@589 384 ^ "){")
adamc@589 385 :: locals
adamc@589 386 @ [str "return ",
adamc@589 387 e,
adamc@589 388 str "}"]),
adamc@589 389 st)
adamc@589 390 end
adamc@589 391
adamc@589 392 | EUnop (s, e) =>
adamc@589 393 let
adamc@589 394 val (e, st) = jsE inner (e, st)
adamc@589 395 in
adamc@589 396 (strcat [str ("(" ^ s),
adamc@572 397 e,
adamc@589 398 str ")"],
adamc@589 399 st)
adamc@589 400 end
adamc@589 401 | EBinop (s, e1, e2) =>
adamc@589 402 let
adamc@589 403 val (e1, st) = jsE inner (e1, st)
adamc@589 404 val (e2, st) = jsE inner (e2, st)
adamc@589 405 in
adamc@589 406 (strcat [str "(",
adamc@589 407 e1,
adamc@589 408 str s,
adamc@589 409 e2,
adamc@589 410 str ")"],
adamc@589 411 st)
adamc@589 412 end
adamc@589 413
adamc@589 414 | ERecord [] => (str "null", st)
adamc@589 415 | ERecord [(x, e, _)] =>
adamc@589 416 let
adamc@589 417 val (e, st) = jsE inner (e, st)
adamc@589 418 in
adamc@589 419 (strcat [str "{_x:", e, str "}"], st)
adamc@589 420 end
adamc@589 421 | ERecord ((x, e, _) :: xes) =>
adamc@589 422 let
adamc@589 423 val (e, st) = jsE inner (e, st)
adamc@589 424
adamc@589 425 val (es, st) =
adamc@589 426 foldr (fn ((x, e, _), (es, st)) =>
adamc@589 427 let
adamc@589 428 val (e, st) = jsE inner (e, st)
adamc@589 429 in
adamc@589 430 (str (",_" ^ x ^ ":")
adamc@589 431 :: e
adamc@589 432 :: es,
adamc@589 433 st)
adamc@589 434 end)
adamc@589 435 ([str "}"], st) xes
adamc@589 436 in
adamc@589 437 (strcat (str ("{_" ^ x ^ ":")
adamc@589 438 :: e
adamc@589 439 :: es),
adamc@589 440 st)
adamc@589 441 end
adamc@589 442 | EField (e, x) =>
adamc@589 443 let
adamc@589 444 val (e, st) = jsE inner (e, st)
adamc@589 445 in
adamc@589 446 (strcat [e,
adamc@589 447 str ("._" ^ x)], st)
adamc@589 448 end
adamc@589 449
adamc@589 450 | ECase (e, pes, _) =>
adamc@589 451 let
adamc@589 452 val plen = length pes
adamc@589 453
adamc@589 454 val (cases, st) = ListUtil.foldliMap
adamc@589 455 (fn (i, (p, e), st) =>
adamc@589 456 let
adamc@589 457 val (e, st) = jsE (inner + E.patBindsN p) (e, st)
adamc@589 458 val fail =
adamc@589 459 if i = plen - 1 then
adamc@589 460 str "pf()"
adamc@589 461 else
adamc@589 462 str ("c" ^ Int.toString (i+1) ^ "()")
adamc@589 463 val c = jsPat 0 inner p e fail
adamc@589 464 in
adamc@589 465 (strcat [str ("c" ^ Int.toString i ^ "=function(){return "),
adamc@589 466 c,
adamc@589 467 str "},"],
adamc@589 468 st)
adamc@589 469 end)
adamc@589 470 st pes
adamc@589 471
adamc@589 472 val (e, st) = jsE inner (e, st)
adamc@589 473 in
adamc@589 474 (strcat (str "("
adamc@589 475 :: List.revAppend (cases,
adamc@589 476 [str "d0=",
adamc@589 477 e,
adamc@589 478 str ",c0())"])), st)
adamc@589 479 end
adamc@589 480
adamc@589 481 | EStrcat (e1, e2) =>
adamc@589 482 let
adamc@589 483 val (e1, st) = jsE inner (e1, st)
adamc@589 484 val (e2, st) = jsE inner (e2, st)
adamc@589 485 in
adamc@589 486 (strcat [str "(", e1, str "+", e2, str ")"], st)
adamc@589 487 end
adamc@589 488
adamc@589 489 | EError (e, _) =>
adamc@589 490 let
adamc@589 491 val (e, st) = jsE inner (e, st)
adamc@589 492 in
adamc@589 493 (strcat [str "alert(\"ERROR: \"+", e, str ")"],
adamc@589 494 st)
adamc@589 495 end
adamc@589 496
adamc@589 497 | EWrite e =>
adamc@589 498 let
adamc@589 499 val (e, st) = jsE inner (e, st)
adamc@589 500 in
adamc@589 501 (strcat [str "document.write(",
adamc@589 502 e,
adamc@589 503 str ".v)"], st)
adamc@589 504 end
adamc@589 505
adamc@589 506 | ESeq (e1, e2) =>
adamc@589 507 let
adamc@589 508 val (e1, st) = jsE inner (e1, st)
adamc@589 509 val (e2, st) = jsE inner (e2, st)
adamc@589 510 in
adamc@589 511 (strcat [str "(", e1, str ",", e2, str ")"], st)
adamc@589 512 end
adamc@589 513 | ELet (_, _, e1, e2) =>
adamc@589 514 let
adamc@589 515 val (e1, st) = jsE inner (e1, st)
adamc@589 516 val (e2, st) = jsE (inner + 1) (e2, st)
adamc@589 517 in
adamc@589 518 (strcat [str ("(_" ^ Int.toString (len + inner) ^ "="),
adamc@589 519 e1,
adamc@589 520 str ",",
adamc@589 521 e2,
adamc@572 522 str ")"], st)
adamc@572 523 end
adamc@589 524
adamc@590 525 | EJavaScript (_, _, SOME e) => (e, st)
adamc@590 526
adamc@589 527 | EClosure _ => unsupported "EClosure"
adamc@589 528 | EQuery _ => unsupported "Query"
adamc@589 529 | EDml _ => unsupported "DML"
adamc@589 530 | ENextval _ => unsupported "Nextval"
adamc@589 531 | EUnurlify _ => unsupported "EUnurlify"
adamc@590 532 | EJavaScript (_, e, _) => unsupported "Nested JavaScript"
adamc@590 533
adamc@589 534 | ESignalReturn e =>
adamc@572 535 let
adamc@572 536 val (e, st) = jsE inner (e, st)
adamc@572 537 in
adamc@589 538 (strcat [str "sr(",
adamc@589 539 e,
adamc@589 540 str ")"],
adamc@589 541 st)
adamc@589 542 end
adamc@589 543 | ESignalBind (e1, e2) =>
adamc@589 544 let
adamc@589 545 val (e1, st) = jsE inner (e1, st)
adamc@589 546 val (e2, st) = jsE inner (e2, st)
adamc@589 547 in
adamc@589 548 (strcat [str "sb(",
adamc@589 549 e1,
adamc@589 550 str ",",
adamc@589 551 e2,
adamc@589 552 str ")"],
adamc@589 553 st)
adamc@589 554 end
adamc@589 555 | ESignalSource e =>
adamc@589 556 let
adamc@589 557 val (e, st) = jsE inner (e, st)
adamc@589 558 in
adamc@589 559 (strcat [str "ss(",
adamc@589 560 e,
adamc@589 561 str ")"],
adamc@589 562 st)
adamc@572 563 end
adamc@567 564 end
adamc@589 565 in
adamc@589 566 jsE
adamc@589 567 end
adamc@567 568
adamc@589 569 val decl : state -> decl -> decl * state =
adamc@589 570 U.Decl.foldMapB {typ = fn x => x,
adamc@589 571 exp = fn (env, e, st) =>
adamc@589 572 let
adamc@589 573 fun doCode m skip env orig e =
adamc@589 574 let
adamc@589 575 val len = length env
adamc@589 576 fun str s = (EPrim (Prim.String s), #2 e)
adamc@567 577
adamc@589 578 val locals = List.tabulate
adamc@589 579 (varDepth e,
adamc@589 580 fn i => str ("var _" ^ Int.toString (len + i) ^ ";"))
adamc@589 581 val (e, st) = jsExp m skip env 0 (e, st)
adamc@589 582 in
adamc@589 583 (EJavaScript (m, orig, SOME (strcat (#2 e) (locals @ [e]))), st)
adamc@589 584 end
adamc@589 585 in
adamc@589 586 case e of
adamc@590 587 EJavaScript (m as Source t, orig, _) =>
adamc@590 588 (doCode m 0 env orig orig
adamc@590 589 handle Unsupported (s, loc) =>
adamc@590 590 let
adamc@590 591 val e = ELet ("js", t, orig, quoteExp (#2 orig) t
adamc@590 592 (ERel 0, #2 orig))
adamc@590 593 in
adamc@590 594 (EJavaScript (m, orig, SOME (e, #2 orig)), st)
adamc@590 595 end)
adamc@590 596
adamc@590 597 | EJavaScript (m, orig as (EAbs (_, t, _, e), _), _) =>
adamc@590 598 (doCode m 1 (t :: env) orig e
adamc@590 599 handle Unsupported (s, loc) =>
adamc@590 600 (EM.errorAt loc (s ^ " in code to be compiled to JavaScript");
adamc@590 601 (EPrim (Prim.String "ERROR"), st)))
adamc@590 602
adamc@590 603 | EJavaScript (m, orig, _) =>
adamc@590 604 (doCode m 0 env orig orig
adamc@590 605 handle Unsupported (s, loc) =>
adamc@590 606 (EM.errorAt loc (s ^ " in code to be compiled to JavaScript");
adamc@590 607 (EPrim (Prim.String "ERROR"), st)))
adamc@590 608
adamc@589 609 | _ => (e, st)
adamc@589 610 end,
adamc@589 611 decl = fn (_, e, st) => (e, st),
adamc@589 612 bind = fn (env, U.Decl.RelE (_, t)) => t :: env
adamc@589 613 | (env, _) => env}
adamc@589 614 []
adamc@567 615
adamc@567 616 fun doDecl (d, st) =
adamc@567 617 let
adamc@567 618 val (d, st) = decl st d
adamc@567 619 in
adamc@567 620 (List.revAppend (#decls st, [d]),
adamc@567 621 {decls = [],
adamc@589 622 script = #script st,
adamc@589 623 included = #included st})
adamc@567 624 end
adamc@567 625
adamc@567 626 val (ds, st) = ListUtil.foldlMapConcat doDecl
adamc@567 627 {decls = [],
adamc@589 628 script = [],
adamc@589 629 included = IS.empty}
adamc@567 630 file
adamc@569 631
adamc@569 632 val inf = TextIO.openIn (OS.Path.joinDirFile {dir = Config.libJs, file = "urweb.js"})
adamc@569 633 fun lines acc =
adamc@569 634 case TextIO.inputLine inf of
adamc@569 635 NONE => String.concat (rev acc)
adamc@569 636 | SOME line => lines (line :: acc)
adamc@569 637 val lines = lines []
adamc@567 638 in
adamc@569 639 TextIO.closeIn inf;
adamc@589 640 (DJavaScript (lines ^ String.concat (rev (#script st))), ErrorMsg.dummySpan) :: ds
adamc@567 641 end
adamc@567 642
adamc@567 643 end