Replace.cpp

   1 /* Cycript - The Truly Universal Scripting Language
   2  * Copyright (C) 2009-2016  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <iomanip>
  23 #include <map>
  24
  25 #include "Replace.hpp"
  26 #include "Syntax.hpp"
  27
  28 CYFunctionExpression *CYNonLocalize(CYContext &context, CYFunctionExpression *function) {
  29     function->nonlocal_ = context.nextlocal_;
  30     return function;
  31 }
  32
  33 CYFunctionExpression *CYSuperize(CYContext &context, CYFunctionExpression *function) {
  34     function->super_ = context.super_;
  35     return function;
  36 }
  37
  38 CYStatement *CYDefineProperty(CYExpression *object, CYExpression *name, bool configurable, bool enumerable, CYProperty *descriptor) {
  39     return $E($C3($M($V("Object"), $S("defineProperty")), object, name, $ CYObject(CYList<CYProperty>()
  40         ->* (configurable ? $ CYPropertyValue($S("configurable"), $ CYTrue()) : NULL)
  41         ->* (enumerable ? $ CYPropertyValue($S("enumerable"), $ CYTrue()) : NULL)
  42         ->* descriptor)));
  43 }
  44
  45 static void CYImplicitReturn(CYStatement *&code) {
  46     if (CYStatement *&last = CYGetLast(code))
  47         last = last->Return();
  48 }
  49
  50 CYExpression *CYAdd::Replace(CYContext &context) {
  51     CYInfix::Replace(context);
  52
  53     CYString *lhs(dynamic_cast<CYString *>(lhs_));
  54     CYString *rhs(dynamic_cast<CYString *>(rhs_));
  55
  56     if (lhs != NULL || rhs != NULL) {
  57         if (lhs == NULL) {
  58             lhs = lhs_->String(context);
  59             if (lhs == NULL)
  60                 return this;
  61         } else if (rhs == NULL) {
  62             rhs = rhs_->String(context);
  63             if (rhs == NULL)
  64                 return this;
  65         }
  66
  67         return lhs->Concat(context, rhs);
  68     }
  69
  70     if (CYNumber *lhn = lhs_->Number(context))
  71         if (CYNumber *rhn = rhs_->Number(context))
  72             return $D(lhn->Value() + rhn->Value());
  73
  74     return this;
  75 }
  76
  77 CYExpression *CYAddressOf::Replace(CYContext &context) {
  78     return $C0($M(rhs_, $S("$cya")));
  79 }
  80
  81 CYTarget *CYApply::AddArgument(CYContext &context, CYExpression *value) {
  82     CYArgument **argument(&arguments_);
  83     while (*argument != NULL)
  84         argument = &(*argument)->next_;
  85     *argument = $ CYArgument(value);
  86     return this;
  87 }
  88
  89 CYArgument *CYArgument::Replace(CYContext &context) { $T(NULL)
  90     context.Replace(value_);
  91     next_ = next_->Replace(context);
  92
  93     if (value_ == NULL) {
  94         if (next_ == NULL)
  95             return NULL;
  96         else
  97             value_ = $U;
  98     }
  99
 100     return this;
 101 }
 102
 103 CYTarget *CYArray::Replace(CYContext &context) {
 104     CYForEach (element, elements_)
 105         element->Replace(context);
 106     return this;
 107 }
 108
 109 CYTarget *CYArrayComprehension::Replace(CYContext &context) {
 110     CYIdentifier *cyv(context.Unique());
 111
 112     return $C0($F(NULL, $P1($B(cyv), comprehensions_->Parameters(context)), $$
 113         ->* $E($ CYAssign($V(cyv), $ CYArray()))
 114         ->* comprehensions_->Replace(context, $E($C1($M($V(cyv), $S("push")), expression_)))
 115         ->* $ CYReturn($V(cyv))
 116     ));
 117 }
 118
 119 CYExpression *CYAssignment::Replace(CYContext &context) {
 120     // XXX: this is a horrible hack but I'm a month over schedule :(
 121     if (CYSubscriptMember *subscript = dynamic_cast<CYSubscriptMember *>(lhs_))
 122         return $C2($M(subscript->object_, $S("$cys")), subscript->property_, rhs_);
 123     context.Replace(lhs_);
 124     context.Replace(rhs_);
 125     return this;
 126 }
 127
 128 CYStatement *CYBlock::Return() {
 129     CYImplicitReturn(code_);
 130     return this;
 131 }
 132
 133 CYStatement *CYBlock::Replace(CYContext &context) {
 134     CYScope scope(true, context);
 135     context.ReplaceAll(code_);
 136     scope.Close(context);
 137
 138     if (code_ == NULL)
 139         return $ CYEmpty();
 140     return this;
 141 }
 142
 143 CYStatement *CYBreak::Replace(CYContext &context) {
 144     return this;
 145 }
 146
 147 CYTarget *CYCall::Replace(CYContext &context) {
 148     context.Replace(function_);
 149     arguments_->Replace(context);
 150     return this;
 151 }
 152
 153 namespace cy {
 154 namespace Syntax {
 155
 156 void Catch::Replace(CYContext &context) { $T()
 157     CYScope scope(true, context);
 158
 159     name_ = name_->Replace(context, CYIdentifierCatch);
 160
 161     context.ReplaceAll(code_);
 162     scope.Close(context);
 163 }
 164
 165 } }
 166
 167 CYTarget *CYClassExpression::Replace(CYContext &context) {
 168     CYBuilder builder;
 169
 170     CYIdentifier *super(context.Unique());
 171
 172     CYIdentifier *old(context.super_);
 173     context.super_ = super;
 174
 175     CYIdentifier *constructor(context.Unique());
 176     CYForEach (member, tail_->static_)
 177         member->Replace(context, builder, $V(constructor), true);
 178
 179     CYIdentifier *prototype(context.Unique());
 180     CYForEach (member, tail_->instance_)
 181         member->Replace(context, builder, $V(prototype), true);
 182
 183     if (tail_->constructor_ == NULL)
 184         tail_->constructor_ = $ CYFunctionExpression(NULL, NULL, NULL);
 185     tail_->constructor_ = CYSuperize(context, tail_->constructor_);
 186
 187     context.super_ = old;
 188
 189     return $C1($ CYFunctionExpression(NULL, $P($B(super)), $$
 190         ->* $ CYVar($B1($B(constructor, tail_->constructor_)))
 191         ->* $ CYVar($B1($B(prototype, $ CYFunctionExpression(NULL, NULL, NULL))))
 192         ->* $E($ CYAssign($M($V(prototype), $S("prototype")), $M($V(super), $S("prototype"))))
 193         ->* $E($ CYAssign($V(prototype), $N($V(prototype))))
 194         ->* CYDefineProperty($V(prototype), $S("constructor"), false, false, $ CYPropertyValue($S("value"), $V(constructor)))
 195         ->* $ CYVar(builder.bindings_)
 196         ->* builder.statements_
 197         ->* CYDefineProperty($V(constructor), $S("prototype"), false, false, $ CYPropertyValue($S("value"), $V(prototype)))
 198         ->* $ CYReturn($V(constructor))
 199     ), tail_->extends_ ?: $V($I("Object")));
 200 }
 201
 202 CYStatement *CYClassStatement::Replace(CYContext &context) {
 203     return $ CYVar($B1($B(name_, $ CYClassExpression(name_, tail_))));
 204 }
 205
 206 void CYClause::Replace(CYContext &context) { $T()
 207     context.Replace(value_);
 208     context.ReplaceAll(code_);
 209     next_->Replace(context);
 210 }
 211
 212 CYExpression *CYCompound::Replace(CYContext &context) {
 213     context.Replace(expression_);
 214     context.Replace(next_);
 215
 216     if (CYCompound *compound = dynamic_cast<CYCompound *>(expression_)) {
 217         expression_ = compound->expression_;
 218         compound->expression_ = compound->next_;
 219         compound->next_ = next_;
 220         next_ = compound;
 221     }
 222
 223     return this;
 224 }
 225
 226 CYFunctionParameter *CYCompound::Parameter() const {
 227     CYFunctionParameter *next(next_->Parameter());
 228     if (next == NULL)
 229         return NULL;
 230
 231     CYFunctionParameter *parameter(expression_->Parameter());
 232     if (parameter == NULL)
 233         return NULL;
 234
 235     parameter->SetNext(next);
 236     return parameter;
 237 }
 238
 239 CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)
 240     CYFunctionParameter *next(next_->Parameters(context));
 241     if (CYFunctionParameter *parameter = Parameter(context)) {
 242         parameter->SetNext(next);
 243         return parameter;
 244     } else
 245         return next;
 246 }
 247
 248 CYStatement *CYComprehension::Replace(CYContext &context, CYStatement *statement) const {
 249     return next_ == NULL ? statement : next_->Replace(context, statement);
 250 }
 251
 252 CYExpression *CYComputed::PropertyName(CYContext &context) {
 253     return expression_;
 254 }
 255
 256 CYExpression *CYCondition::Replace(CYContext &context) {
 257     context.Replace(test_);
 258     context.Replace(true_);
 259     context.Replace(false_);
 260     return this;
 261 }
 262
 263 void CYContext::NonLocal(CYStatement *&statements) {
 264     CYContext &context(*this);
 265
 266     if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
 267         CYIdentifier *cye($I("$cye")->Replace(context, CYIdentifierGlobal));
 268         CYIdentifier *unique(nextlocal_->identifier_->Replace(context, CYIdentifierGlobal));
 269
 270         CYStatement *declare(
 271             $ CYVar($B1($B(unique, $ CYObject()))));
 272
 273         cy::Syntax::Catch *rescue(
 274             $ cy::Syntax::Catch(cye, $$
 275                 ->* $ CYIf($ CYIdentical($M($V(cye), $S("$cyk")), $V(unique)), $$
 276                     ->* $ CYReturn($M($V(cye), $S("$cyv"))))
 277                 ->* $ cy::Syntax::Throw($V(cye))));
 278
 279         context.Replace(declare);
 280         rescue->Replace(context);
 281
 282         statements = $$
 283             ->* declare
 284             ->* $ cy::Syntax::Try(statements, rescue, NULL);
 285     }
 286 }
 287
 288 CYIdentifier *CYContext::Unique() {
 289     return $ CYIdentifier($pool.strcat("$cy", $pool.itoa(unique_++), NULL));
 290 }
 291
 292 CYStatement *CYContinue::Replace(CYContext &context) {
 293     return this;
 294 }
 295
 296 CYStatement *CYDebugger::Replace(CYContext &context) {
 297     return this;
 298 }
 299
 300 CYTarget *CYBinding::Target(CYContext &context) {
 301     return $V(identifier_);
 302 }
 303
 304 CYAssignment *CYBinding::Replace(CYContext &context, CYIdentifierKind kind) {
 305     identifier_ = identifier_->Replace(context, kind);
 306
 307     if (initializer_ == NULL)
 308         return NULL;
 309
 310     CYAssignment *value($ CYAssign(Target(context), initializer_));
 311     initializer_ = NULL;
 312     return value;
 313 }
 314
 315 CYExpression *CYBindings::Replace(CYContext &context, CYIdentifierKind kind) { $T(NULL)
 316     CYAssignment *assignment(binding_->Replace(context, kind));
 317     CYExpression *compound(next_->Replace(context, kind));
 318
 319     if (assignment != NULL)
 320         if (compound == NULL)
 321             compound = assignment;
 322         else
 323             compound = $ CYCompound(assignment, compound);
 324     return compound;
 325 }
 326
 327 CYFunctionParameter *CYBindings::Parameter(CYContext &context) { $T(NULL)
 328     return $ CYFunctionParameter($ CYBinding(binding_->identifier_), next_->Parameter(context));
 329 }
 330
 331 CYArgument *CYBindings::Argument(CYContext &context) { $T(NULL)
 332     return $ CYArgument(binding_->initializer_, next_->Argument(context));
 333 }
 334
 335 CYTarget *CYDirectMember::Replace(CYContext &context) {
 336     context.Replace(object_);
 337     context.Replace(property_);
 338     return this;
 339 }
 340
 341 CYStatement *CYDoWhile::Replace(CYContext &context) {
 342     context.Replace(test_);
 343     context.ReplaceAll(code_);
 344     return this;
 345 }
 346
 347 void CYElementSpread::Replace(CYContext &context) {
 348     context.Replace(value_);
 349 }
 350
 351 void CYElementValue::Replace(CYContext &context) {
 352     context.Replace(value_);
 353 }
 354
 355 CYForInitializer *CYEmpty::Replace(CYContext &context) {
 356     return NULL;
 357 }
 358
 359 CYTarget *CYEncodedType::Replace(CYContext &context) {
 360     return typed_->Replace(context);
 361 }
 362
 363 CYTarget *CYEval::Replace(CYContext &context) {
 364     context.scope_->Damage();
 365     if (arguments_ != NULL)
 366         arguments_->value_ = $C1($M($V("Cycript"), $S("compile")), arguments_->value_);
 367     return $C($V("eval"), arguments_);
 368 }
 369
 370 CYStatement *CYExpress::Return() {
 371     return $ CYReturn(expression_);
 372 }
 373
 374 CYForInitializer *CYExpress::Replace(CYContext &context) {
 375     context.Replace(expression_);
 376     return this;
 377 }
 378
 379 CYTarget *CYExpression::AddArgument(CYContext &context, CYExpression *value) {
 380     return $C1(this, value);
 381 }
 382
 383 CYFunctionParameter *CYExpression::Parameter() const {
 384     return NULL;
 385 }
 386
 387 CYTarget *CYExtend::Replace(CYContext &context) {
 388     return object_.Replace(context, lhs_);
 389 }
 390
 391 CYStatement *CYExternalDefinition::Replace(CYContext &context) {
 392     return $E($ CYAssign($V(typed_->identifier_), $ CYExternalExpression(abi_, typed_)));
 393 }
 394
 395 CYTarget *CYExternalExpression::Replace(CYContext &context) {
 396     return $C1(typed_->Replace(context), $C2($V("dlsym"), $V("RTLD_DEFAULT"), $S(typed_->identifier_->Word())));
 397 }
 398
 399 CYNumber *CYFalse::Number(CYContext &context) {
 400     return $D(0);
 401 }
 402
 403 CYString *CYFalse::String(CYContext &context) {
 404     return $S("false");
 405 }
 406
 407 CYExpression *CYFatArrow::Replace(CYContext &context) {
 408     CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
 409     function->this_.SetNext(context.this_);
 410     return function;
 411 }
 412
 413 void CYFinally::Replace(CYContext &context) { $T()
 414     CYScope scope(true, context);
 415     context.ReplaceAll(code_);
 416     scope.Close(context);
 417 }
 418
 419 CYStatement *CYFor::Replace(CYContext &context) {
 420     CYScope outer(true, context);
 421     context.Replace(initializer_);
 422
 423     context.Replace(test_);
 424
 425     {
 426         CYScope inner(true, context);
 427         context.ReplaceAll(code_);
 428         inner.Close(context);
 429     }
 430
 431     context.Replace(increment_);
 432
 433     outer.Close(context);
 434     return this;
 435 }
 436
 437 CYStatement *CYForLexical::Initialize(CYContext &context, CYExpression *value) {
 438     if (value == NULL) {
 439         if (binding_->initializer_ == NULL)
 440             return NULL;
 441         value = binding_->initializer_;
 442     }
 443
 444     return $ CYLexical(constant_, $B1($ CYBinding(binding_->identifier_, value)));
 445 }
 446
 447 CYTarget *CYForLexical::Replace(CYContext &context) {
 448     _assert(binding_->Replace(context, CYIdentifierLexical) == NULL);
 449     return binding_->Target(context);
 450 }
 451
 452 CYStatement *CYForIn::Replace(CYContext &context) {
 453     CYScope scope(true, context);
 454     context.Replace(initializer_);
 455     context.Replace(iterable_);
 456     context.ReplaceAll(code_);
 457     scope.Close(context);
 458     return this;
 459 }
 460
 461 CYStatement *CYForInitialized::Replace(CYContext &context) {
 462     CYAssignment *assignment(binding_->Replace(context, CYIdentifierVariable));
 463     return $ CYBlock($$
 464         ->* (assignment == NULL ? NULL : $ CYExpress(assignment))
 465         ->* $ CYForIn(binding_->Target(context), iterable_, code_));
 466 }
 467
 468 CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {
 469     return $ CYFunctionParameter(binding_);
 470 }
 471
 472 CYStatement *CYForInComprehension::Replace(CYContext &context, CYStatement *statement) const {
 473     return $ CYForIn(binding_->Target(context), iterable_, CYComprehension::Replace(context, statement));
 474 }
 475
 476 CYStatement *CYForOf::Replace(CYContext &context) {
 477     CYIdentifier *item(context.Unique()), *list(context.Unique());
 478
 479     return $ CYBlock($$
 480         ->* initializer_->Initialize(context, NULL)
 481         ->* $ CYLexical(false, $B2($B(list, iterable_), $B(item)))
 482         ->* $ CYForIn($V(item), $V(list), $ CYBlock($$
 483             ->* initializer_->Initialize(context, $M($V(list), $V(item)))
 484             ->* code_
 485     )));
 486 }
 487
 488 CYFunctionParameter *CYForOfComprehension::Parameter(CYContext &context) const {
 489     return $ CYFunctionParameter(binding_);
 490 }
 491
 492 CYStatement *CYForOfComprehension::Replace(CYContext &context, CYStatement *statement) const {
 493     CYIdentifier *cys(context.Unique());
 494
 495     return $ CYBlock($$
 496         ->* $ CYLexical(false, $B1($B(cys, iterable_)))
 497         ->* $ CYForIn(binding_->Target(context), $V(cys), $ CYBlock($$
 498             ->* $E($ CYAssign(binding_->Target(context), $M($V(cys), binding_->Target(context))))
 499             ->* CYComprehension::Replace(context, statement)
 500     )));
 501 }
 502
 503 CYStatement *CYForVariable::Initialize(CYContext &context, CYExpression *value) {
 504     if (value == NULL) {
 505         if (binding_->initializer_ == NULL)
 506             return NULL;
 507         value = binding_->initializer_;
 508     }
 509
 510     return $ CYVar($B1($ CYBinding(binding_->identifier_, value)));
 511 }
 512
 513 CYTarget *CYForVariable::Replace(CYContext &context) {
 514     _assert(binding_->Replace(context, CYIdentifierVariable) == NULL);
 515     return binding_->Target(context);
 516 }
 517
 518 // XXX: this is evil evil black magic. don't ask, don't tell... don't believe!
 519 #define MappingSet "0etnirsoalfucdphmgyvbxTwSNECAFjDLkMOIBPqzRH$_WXUVGYKQJZ"
 520 //#define MappingSet "0abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_"
 521
 522 void CYFunction::Replace(CYContext &context) {
 523     CYThisScope *_this(context.this_);
 524     context.this_ = &this_;
 525     context.this_ = CYGetLast(context.this_);
 526
 527     CYIdentifier *super(context.super_);
 528     context.super_ = super_;
 529
 530     CYNonLocal *nonlocal(context.nonlocal_);
 531     CYNonLocal *nextlocal(context.nextlocal_);
 532
 533     bool localize;
 534     if (nonlocal_ != NULL) {
 535         localize = false;
 536         context.nonlocal_ = nonlocal_;
 537     } else {
 538         localize = true;
 539         nonlocal_ = $ CYNonLocal();
 540         context.nextlocal_ = nonlocal_;
 541     }
 542
 543     CYScope scope(!localize, context);
 544
 545     $I("arguments")->Replace(context, CYIdentifierMagic);
 546
 547     parameters_->Replace(context, code_);
 548
 549     context.ReplaceAll(code_);
 550
 551     if (implicit_)
 552         CYImplicitReturn(code_);
 553
 554     if (CYIdentifier *identifier = this_.identifier_) {
 555         context.scope_->Declare(context, identifier, CYIdentifierVariable);
 556         code_ = $$
 557             ->* $E($ CYAssign($V(identifier), $ CYThis()))
 558             ->* code_;
 559     }
 560
 561     if (localize)
 562         context.NonLocal(code_);
 563
 564     context.nextlocal_ = nextlocal;
 565     context.nonlocal_ = nonlocal;
 566
 567     context.super_ = super;
 568     context.this_ = _this;
 569
 570     scope.Close(context, code_);
 571 }
 572
 573 CYTarget *CYFunctionExpression::Replace(CYContext &context) {
 574     CYScope scope(false, context);
 575     if (name_ != NULL)
 576         name_ = name_->Replace(context, CYIdentifierOther);
 577
 578     CYFunction::Replace(context);
 579     scope.Close(context);
 580     return this;
 581 }
 582
 583 void CYFunctionParameter::Replace(CYContext &context, CYStatement *&statements) { $T()
 584     CYAssignment *assignment(binding_->Replace(context, CYIdentifierArgument));
 585
 586     next_->Replace(context, statements);
 587
 588     if (assignment != NULL)
 589         statements = $$
 590             ->* $ CYIf($ CYIdentical($ CYTypeOf(binding_->Target(context)), $S("undefined")), $$
 591                 ->* $E(assignment))
 592             ->* statements;
 593 }
 594
 595 CYStatement *CYFunctionStatement::Replace(CYContext &context) {
 596     name_ = name_->Replace(context, CYIdentifierOther);
 597     CYFunction::Replace(context);
 598     return this;
 599 }
 600
 601 CYIdentifier *CYIdentifier::Replace(CYContext &context, CYIdentifierKind kind) {
 602     if (next_ == this)
 603         return this;
 604     if (next_ != NULL)
 605         return next_->Replace(context, kind);
 606     next_ = context.scope_->Declare(context, this, kind)->identifier_;
 607     return next_;
 608 }
 609
 610 CYStatement *CYIf::Return() {
 611     CYImplicitReturn(true_);
 612     CYImplicitReturn(false_);
 613     return this;
 614 }
 615
 616 CYStatement *CYIf::Replace(CYContext &context) {
 617     context.Replace(test_);
 618     context.ReplaceAll(true_);
 619     context.ReplaceAll(false_);
 620     return this;
 621 }
 622
 623 CYFunctionParameter *CYIfComprehension::Parameter(CYContext &context) const {
 624     return NULL;
 625 }
 626
 627 CYStatement *CYIfComprehension::Replace(CYContext &context, CYStatement *statement) const {
 628     return $ CYIf(test_, CYComprehension::Replace(context, statement));
 629 }
 630
 631 CYStatement *CYImport::Replace(CYContext &context) {
 632     return $ CYVar($B1($B($I(module_->part_->Word()), $C1($V("require"), module_->Replace(context, "/")))));
 633 }
 634
 635 CYStatement *CYImportDeclaration::Replace(CYContext &context) {
 636     CYIdentifier *module(context.Unique());
 637
 638     CYList<CYStatement> statements;
 639     CYForEach (specifier, specifiers_)
 640         statements->*specifier->Replace(context, module);
 641
 642     return $ CYBlock($$
 643         ->* $ CYLexical(false, $B1($B(module, $C1($V("require"), module_))))
 644         ->* statements);
 645 }
 646
 647 CYStatement *CYImportSpecifier::Replace(CYContext &context, CYIdentifier *module) {
 648     binding_ = binding_->Replace(context, CYIdentifierLexical);
 649
 650     CYExpression *import($V(module));
 651     if (name_ != NULL)
 652         import = $M(import, $S(name_));
 653     return $E($ CYAssign($V(binding_), import));
 654 }
 655
 656 CYTarget *CYIndirect::Replace(CYContext &context) {
 657     return $M(rhs_, $S("$cyi"));
 658 }
 659
 660 CYTarget *CYIndirectMember::Replace(CYContext &context) {
 661     return $M($ CYIndirect(object_), property_);
 662 }
 663
 664 CYExpression *CYInfix::Replace(CYContext &context) {
 665     context.Replace(lhs_);
 666     context.Replace(rhs_);
 667     return this;
 668 }
 669
 670 CYStatement *CYLabel::Replace(CYContext &context) {
 671     context.Replace(statement_);
 672     return this;
 673 }
 674
 675 CYTarget *CYLambda::Replace(CYContext &context) {
 676     return $N2($V("Functor"), $ CYFunctionExpression(NULL, parameters_->Parameters(context), code_), parameters_->TypeSignature(context, typed_->Replace(context)));
 677 }
 678
 679 CYForInitializer *CYLexical::Replace(CYContext &context) {
 680     if (CYExpression *expression = bindings_->Replace(context, CYIdentifierLexical))
 681         return $E(expression);
 682     return $ CYEmpty();
 683 }
 684
 685 CYFunctionExpression *CYMethod::Constructor() {
 686     return NULL;
 687 }
 688
 689 void CYMethod::Replace(CYContext &context) {
 690     CYFunction::Replace(context);
 691 }
 692
 693 CYString *CYModule::Replace(CYContext &context, const char *separator) const {
 694     if (next_ == NULL)
 695         return $ CYString(part_);
 696     return $ CYString($pool.strcat(next_->Replace(context, separator)->Value(), separator, part_->Word(), NULL));
 697 }
 698
 699 CYExpression *CYMultiply::Replace(CYContext &context) {
 700     CYInfix::Replace(context);
 701
 702     if (CYNumber *lhn = lhs_->Number(context))
 703         if (CYNumber *rhn = rhs_->Number(context))
 704             return $D(lhn->Value() * rhn->Value());
 705
 706     return this;
 707 }
 708
 709 namespace cy {
 710 namespace Syntax {
 711
 712 CYTarget *New::AddArgument(CYContext &context, CYExpression *value) {
 713     CYSetLast(arguments_) = $ CYArgument(value);
 714     return this;
 715 }
 716
 717 CYTarget *New::Replace(CYContext &context) {
 718     context.Replace(constructor_);
 719     arguments_->Replace(context);
 720     return this;
 721 }
 722
 723 } }
 724
 725 CYNumber *CYNull::Number(CYContext &context) {
 726     return $D(0);
 727 }
 728
 729 CYString *CYNull::String(CYContext &context) {
 730     return $S("null");
 731 }
 732
 733 CYNumber *CYNumber::Number(CYContext &context) {
 734     return this;
 735 }
 736
 737 CYString *CYNumber::String(CYContext &context) {
 738     // XXX: there is a precise algorithm for this
 739     return $S($pool.sprintf(24, "%.17g", Value()));
 740 }
 741
 742 CYExpression *CYNumber::PropertyName(CYContext &context) {
 743     return String(context);
 744 }
 745
 746 CYTarget *CYObject::Replace(CYContext &context, CYTarget *seed) {
 747     CYBuilder builder;
 748     if (properties_ != NULL)
 749         properties_ = properties_->ReplaceAll(context, builder, $ CYThis(), seed != this);
 750
 751     if (builder) {
 752         return $C1($M($ CYFunctionExpression(NULL, builder.bindings_->Parameter(context),
 753             builder.statements_
 754                 ->* $ CYReturn($ CYThis())
 755         ), $S("call")), seed, builder.bindings_->Argument(context));
 756     }
 757
 758     CYForEach (property, properties_)
 759         property->Replace(context);
 760     return seed;
 761 }
 762
 763 CYTarget *CYObject::Replace(CYContext &context) {
 764     return Replace(context, this);
 765 }
 766
 767 CYTarget *CYParenthetical::Replace(CYContext &context) {
 768     // XXX: return expression_;
 769     context.Replace(expression_);
 770     return this;
 771 }
 772
 773 CYExpression *CYPostfix::Replace(CYContext &context) {
 774     context.Replace(lhs_);
 775     return this;
 776 }
 777
 778 CYExpression *CYPrefix::Replace(CYContext &context) {
 779     context.Replace(rhs_);
 780     return this;
 781 }
 782
 783 CYProperty *CYProperty::ReplaceAll(CYContext &context, CYBuilder &builder, CYExpression *self, bool update) {
 784     update |= Update();
 785     if (update)
 786         Replace(context, builder, self, false);
 787     if (next_ != NULL)
 788         next_ = next_->ReplaceAll(context, builder, self, update);
 789     return update ? next_ : this;
 790 }
 791
 792 void CYProperty::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, bool protect) {
 793     CYExpression *name(name_->PropertyName(context));
 794     if (name_->Computed()) {
 795         CYIdentifier *unique(context.Unique());
 796         builder.bindings_
 797             ->* $B1($B(unique, name));
 798         name = $V(unique);
 799     }
 800
 801     Replace(context, builder, self, name, protect);
 802 }
 803
 804 bool CYProperty::Update() const {
 805     return name_->Computed();
 806 }
 807
 808 void CYPropertyGetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 809     CYIdentifier *unique(context.Unique());
 810     builder.bindings_
 811         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 812     builder.statements_
 813         ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("get"), $V(unique)));
 814 }
 815
 816 CYFunctionExpression *CYPropertyMethod::Constructor() {
 817     return name_->Constructor() ? $ CYFunctionExpression(NULL, parameters_, code_) : NULL;
 818 }
 819
 820 void CYPropertyMethod::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 821     CYIdentifier *unique(context.Unique());
 822     builder.bindings_
 823         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 824     builder.statements_
 825         ->* (!protect ? $E($ CYAssign($M(self, name), $V(unique))) :
 826             CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("value"), $V(unique), $ CYPropertyValue($S("writable"), $ CYTrue()))));
 827 }
 828
 829 bool CYPropertyMethod::Update() const {
 830     return true;
 831 }
 832
 833 void CYPropertySetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 834     CYIdentifier *unique(context.Unique());
 835     builder.bindings_
 836         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 837     builder.statements_
 838         ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("set"), $V(unique)));
 839 }
 840
 841 void CYPropertyValue::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 842     _assert(!protect);
 843     CYIdentifier *unique(context.Unique());
 844     builder.bindings_
 845         ->* $B1($B(unique, value_));
 846     builder.statements_
 847         ->* $E($ CYAssign($M(self, name), $V(unique)));
 848 }
 849
 850 void CYPropertyValue::Replace(CYContext &context) {
 851     context.Replace(value_);
 852 }
 853
 854 void CYScript::Replace(CYContext &context) {
 855     CYScope scope(false, context);
 856     context.scope_->Damage();
 857
 858     context.nextlocal_ = $ CYNonLocal();
 859     context.ReplaceAll(code_);
 860     context.NonLocal(code_);
 861
 862     scope.Close(context, code_);
 863
 864     unsigned offset(0);
 865
 866     for (std::vector<CYIdentifier *>::const_iterator i(context.replace_.begin()); i != context.replace_.end(); ++i) {
 867         const char *name;
 868         if (context.options_.verbose_)
 869             name = $pool.strcat("$", $pool.itoa(offset++), NULL);
 870         else {
 871             char id[8];
 872             id[7] = '\0';
 873
 874           id:
 875             unsigned position(7), local(offset++ + 1);
 876
 877             do {
 878                 unsigned index(local % (sizeof(MappingSet) - 1));
 879                 local /= sizeof(MappingSet) - 1;
 880                 id[--position] = MappingSet[index];
 881             } while (local != 0);
 882
 883             if (scope.Lookup(context, id + position) != NULL)
 884                 goto id;
 885             // XXX: at some point, this could become a keyword
 886
 887             name = $pool.strmemdup(id + position, 7 - position);
 888         }
 889
 890         CYIdentifier *identifier(*i);
 891         _assert(identifier->next_ == identifier);
 892         identifier->next_ = $I(name);
 893     }
 894 }
 895
 896 CYTarget *CYResolveMember::Replace(CYContext &context) {
 897     return $M($M(object_, $S("$cyr")), property_);
 898 }
 899
 900 CYStatement *CYReturn::Replace(CYContext &context) {
 901     if (context.nonlocal_ != NULL) {
 902         CYProperty *value(value_ == NULL ? NULL : $ CYPropertyValue($S("$cyv"), value_));
 903         return $ cy::Syntax::Throw($ CYObject(
 904             $ CYPropertyValue($S("$cyk"), $V(context.nonlocal_->Target(context)), value)
 905         ));
 906     }
 907
 908     context.Replace(value_);
 909     return this;
 910 }
 911
 912 CYTarget *CYRubyBlock::Replace(CYContext &context) {
 913     return lhs_->AddArgument(context, proc_->Replace(context));
 914 }
 915
 916 CYTarget *CYRubyBlock::AddArgument(CYContext &context, CYExpression *value) {
 917     return Replace(context)->AddArgument(context, value);
 918 }
 919
 920 CYTarget *CYRubyProc::Replace(CYContext &context) {
 921     CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
 922     function = CYNonLocalize(context, function);
 923     function->implicit_ = true;
 924     return function;
 925 }
 926
 927 CYScope::CYScope(bool transparent, CYContext &context) :
 928     transparent_(transparent),
 929     parent_(context.scope_),
 930     damaged_(false),
 931     shadow_(NULL),
 932     internal_(NULL)
 933 {
 934     _assert(!transparent_ || parent_ != NULL);
 935     context.scope_ = this;
 936 }
 937
 938 void CYScope::Damage() {
 939     damaged_ = true;
 940     if (parent_ != NULL)
 941         parent_->Damage();
 942 }
 943
 944 CYIdentifierFlags *CYScope::Lookup(CYContext &context, const char *word) {
 945     CYForEach (i, internal_)
 946         if (strcmp(i->identifier_->Word(), word) == 0)
 947             return i;
 948     return NULL;
 949 }
 950
 951 CYIdentifierFlags *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
 952     return Lookup(context, identifier->Word());
 953 }
 954
 955 CYIdentifierFlags *CYScope::Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierKind kind) {
 956     _assert(identifier->next_ == NULL || identifier->next_ == identifier);
 957
 958     CYIdentifierFlags *existing(Lookup(context, identifier));
 959     if (existing == NULL)
 960         internal_ = $ CYIdentifierFlags(identifier, kind, internal_);
 961     ++internal_->count_;
 962     if (existing == NULL)
 963         return internal_;
 964
 965     if (kind == CYIdentifierGlobal);
 966     else if (existing->kind_ == CYIdentifierGlobal || existing->kind_ == CYIdentifierMagic)
 967         existing->kind_ = kind;
 968     else if (existing->kind_ == CYIdentifierLexical || kind == CYIdentifierLexical)
 969         _assert(false); // XXX: throw new SyntaxError()
 970
 971     return existing;
 972 }
 973
 974 void CYScope::Merge(CYContext &context, const CYIdentifierFlags *flags) {
 975     _assert(flags->identifier_->next_ == flags->identifier_);
 976     CYIdentifierFlags *existing(Declare(context, flags->identifier_, flags->kind_));
 977     flags->identifier_->next_ = existing->identifier_;
 978
 979     existing->count_ += flags->count_;
 980     if (existing->offset_ < flags->offset_)
 981         existing->offset_ = flags->offset_;
 982 }
 983
 984 void CYScope::Close(CYContext &context, CYStatement *&statements) {
 985     Close(context);
 986
 987     CYList<CYBindings> bindings;
 988
 989     CYForEach (i, internal_)
 990         if (i->kind_ == CYIdentifierVariable)
 991             bindings
 992                 ->* $ CYBindings($ CYBinding(i->identifier_));
 993
 994     if (bindings) {
 995         CYVar *var($ CYVar(bindings));
 996         var->SetNext(statements);
 997         statements = var;
 998     }
 999 }
1000
1001 void CYScope::Close(CYContext &context) {
1002     context.scope_ = parent_;
1003
1004     CYForEach (i, internal_) {
1005         _assert(i->identifier_->next_ == i->identifier_);
1006     switch (i->kind_) {
1007         case CYIdentifierArgument: {
1008             _assert(!transparent_);
1009         } break;
1010
1011         case CYIdentifierLexical: {
1012             if (!damaged_) {
1013                 CYIdentifier *replace(context.Unique());
1014                 replace->next_ = replace;
1015                 i->identifier_->next_ = replace;
1016                 i->identifier_ = replace;
1017             }
1018
1019             if (!transparent_)
1020                 i->kind_ = CYIdentifierVariable;
1021             else
1022                 parent_->Declare(context, i->identifier_, CYIdentifierVariable);
1023         } break;
1024
1025         case CYIdentifierVariable: {
1026             if (transparent_) {
1027                 parent_->Declare(context, i->identifier_, i->kind_);
1028                 i->kind_ = CYIdentifierGlobal;
1029             }
1030         } break;
1031     default:; } }
1032
1033     if (damaged_)
1034         return;
1035
1036     typedef std::multimap<unsigned, CYIdentifier *> CYIdentifierOffsetMap;
1037     CYIdentifierOffsetMap offsets;
1038
1039     CYForEach (i, internal_) {
1040         _assert(i->identifier_->next_ == i->identifier_);
1041     switch (i->kind_) {
1042         case CYIdentifierArgument:
1043         case CYIdentifierVariable:
1044             offsets.insert(CYIdentifierOffsetMap::value_type(i->offset_, i->identifier_));
1045         break;
1046     default:; } }
1047
1048     unsigned offset(0);
1049
1050     for (CYIdentifierOffsetMap::const_iterator i(offsets.begin()); i != offsets.end(); ++i) {
1051         if (offset < i->first)
1052             offset = i->first;
1053         CYIdentifier *identifier(i->second);
1054
1055         if (offset >= context.replace_.size())
1056             context.replace_.resize(offset + 1, NULL);
1057         CYIdentifier *&replace(context.replace_[offset++]);
1058
1059         if (replace == NULL)
1060             replace = identifier;
1061         else {
1062             _assert(replace->next_ == replace);
1063             identifier->next_ = replace;
1064         }
1065     }
1066
1067     if (parent_ == NULL)
1068         return;
1069
1070     CYForEach (i, internal_) {
1071     switch (i->kind_) {
1072         case CYIdentifierGlobal: {
1073             if (i->offset_ < offset)
1074                 i->offset_ = offset;
1075             parent_->Merge(context, i);
1076         } break;
1077     default:; } }
1078 }
1079
1080 CYTarget *CYSubscriptMember::Replace(CYContext &context) {
1081     return $C1($M(object_, $S("$cyg")), property_);
1082 }
1083
1084 CYElementValue *CYSpan::Replace(CYContext &context) { $T(NULL)
1085     return $ CYElementValue(expression_, $ CYElementValue(string_, next_->Replace(context)));
1086 }
1087
1088 CYStatement *CYStatement::Return() {
1089     return this;
1090 }
1091
1092 CYString *CYString::Concat(CYContext &context, CYString *rhs) const {
1093     size_t size(size_ + rhs->size_);
1094     char *value($ char[size + 1]);
1095     memcpy(value, value_, size_);
1096     memcpy(value + size_, rhs->value_, rhs->size_);
1097     value[size] = '\0';
1098     return $S(value, size);
1099 }
1100
1101 CYNumber *CYString::Number(CYContext &context) {
1102     // XXX: there is a precise algorithm for this
1103     return NULL;
1104 }
1105
1106 CYExpression *CYString::PropertyName(CYContext &context) {
1107     return this;
1108 }
1109
1110 CYString *CYString::String(CYContext &context) {
1111     return this;
1112 }
1113
1114 CYStatement *CYStructDefinition::Replace(CYContext &context) {
1115     CYTarget *target(tail_->Replace(context));
1116     if (name_ != NULL)
1117         target = $C1($M(target, $S("withName")), $S(name_->Word()));
1118     return $ CYLexical(false, $B1($B($I($pool.strcat(name_->Word(), "$cy", NULL)), target)));
1119 }
1120
1121 CYTarget *CYStructTail::Replace(CYContext &context) {
1122     CYList<CYElementValue> types;
1123     CYList<CYElementValue> names;
1124
1125     CYForEach (field, fields_) {
1126         CYTypedIdentifier *typed(field->typed_);
1127         types->*$ CYElementValue(typed->Replace(context));
1128
1129         CYExpression *name;
1130         if (typed->identifier_ == NULL)
1131             name = NULL;
1132         else
1133             name = $S(typed->identifier_->Word());
1134         names->*$ CYElementValue(name);
1135     }
1136
1137     return $N2($V("Type"), $ CYArray(types), $ CYArray(names));
1138 }
1139
1140 CYTarget *CYSuperAccess::Replace(CYContext &context) {
1141     return $C1($M($M($M($V(context.super_), $S("prototype")), property_), $S("bind")), $ CYThis());
1142 }
1143
1144 CYTarget *CYSuperCall::Replace(CYContext &context) {
1145     return $C($C1($M($V(context.super_), $S("bind")), $ CYThis()), arguments_);
1146 }
1147
1148 CYTarget *CYSymbol::Replace(CYContext &context) {
1149     return $C1($M($V("Symbol"), $S("for")), $S(name_));
1150 }
1151
1152 CYStatement *CYSwitch::Replace(CYContext &context) {
1153     context.Replace(value_);
1154     clauses_->Replace(context);
1155     return this;
1156 }
1157
1158 CYStatement *CYTarget::Initialize(CYContext &context, CYExpression *value) {
1159     if (value == NULL)
1160         return NULL;
1161     return $E($ CYAssign(this, value));
1162 }
1163
1164 CYTarget *CYTemplate::Replace(CYContext &context) {
1165     return $C2($M($M($M($V("String"), $S("prototype")), $S("concat")), $S("apply")), $S(""), $ CYArray($ CYElementValue(string_, spans_->Replace(context))));
1166 }
1167
1168 CYTarget *CYThis::Replace(CYContext &context) {
1169     if (context.this_ != NULL)
1170         return $V(context.this_->Identifier(context));
1171     return this;
1172 }
1173
1174 namespace cy {
1175 namespace Syntax {
1176
1177 CYStatement *Throw::Replace(CYContext &context) {
1178     context.Replace(value_);
1179     return this;
1180 }
1181
1182 } }
1183
1184 CYTarget *CYTrivial::Replace(CYContext &context) {
1185     return this;
1186 }
1187
1188 CYNumber *CYTrue::Number(CYContext &context) {
1189     return $D(1);
1190 }
1191
1192 CYString *CYTrue::String(CYContext &context) {
1193     return $S("true");
1194 }
1195
1196 namespace cy {
1197 namespace Syntax {
1198
1199 CYStatement *Try::Replace(CYContext &context) {
1200     CYScope scope(true, context);
1201     context.ReplaceAll(code_);
1202     scope.Close(context);
1203
1204     catch_->Replace(context);
1205     finally_->Replace(context);
1206     return this;
1207 }
1208
1209 } }
1210
1211 CYTarget *CYTypeArrayOf::Replace_(CYContext &context, CYTarget *type) {
1212     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("arrayOf")), $ CYArgument(size_)));
1213 }
1214
1215 CYTarget *CYTypeBlockWith::Replace_(CYContext &context, CYTarget *type) {
1216     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("blockWith")), parameters_->Argument(context)));
1217 }
1218
1219 CYTarget *CYTypeCharacter::Replace(CYContext &context) {
1220     switch (signing_) {
1221         case CYTypeNeutral: return $V("char");
1222         case CYTypeSigned: return $V("schar");
1223         case CYTypeUnsigned: return $V("uchar");
1224         default: _assert(false);
1225     }
1226 }
1227
1228 CYTarget *CYTypeConstant::Replace_(CYContext &context, CYTarget *type) {
1229     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("constant"))));
1230 }
1231
1232 CYStatement *CYTypeDefinition::Replace(CYContext &context) {
1233     CYIdentifier *identifier(typed_->identifier_);
1234     typed_->identifier_ = NULL;
1235     return $ CYLexical(false, $B1($B(identifier, $ CYTypeExpression(typed_))));
1236 }
1237
1238 CYTarget *CYTypeError::Replace(CYContext &context) {
1239     _assert(false);
1240     return NULL;
1241 }
1242
1243 CYTarget *CYTypeExpression::Replace(CYContext &context) {
1244     return typed_->Replace(context);
1245 }
1246
1247 CYTarget *CYTypeIntegral::Replace(CYContext &context) {
1248     bool u(signing_ == CYTypeUnsigned);
1249     switch (length_) {
1250         case 0: return $V(u ? "ushort" : "short");
1251         case 1: return $V(u ? "uint" : "int");
1252         case 2: return $V(u ? "ulong" : "long");
1253         case 3: return $V(u ? "ulonglong" : "longlong");
1254         default: _assert(false);
1255     }
1256 }
1257
1258 CYTarget *CYTypeModifier::Replace(CYContext &context, CYTarget *type) { $T(type)
1259     return Replace_(context, type);
1260 }
1261
1262 CYTarget *CYTypeFunctionWith::Replace_(CYContext &context, CYTarget *type) {
1263     CYList<CYArgument> arguments(parameters_->Argument(context));
1264     if (variadic_)
1265         arguments->*$C_($ CYNull());
1266     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("functionWith")), arguments));
1267 }
1268
1269 CYTarget *CYTypePointerTo::Replace_(CYContext &context, CYTarget *type) {
1270     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("pointerTo"))));
1271 }
1272
1273 CYTarget *CYTypeReference::Replace(CYContext &context) {
1274     return $V($pool.strcat(name_->Word(), "$cy", NULL));
1275 }
1276
1277 CYTarget *CYTypeStruct::Replace(CYContext &context) {
1278     CYTarget *target(tail_->Replace(context));
1279     if (name_ != NULL)
1280         target = $C1($M(target, $S("withName")), $S(name_->Word()));
1281     return target;
1282 }
1283
1284 CYTarget *CYTypeVariable::Replace(CYContext &context) {
1285     return $V(name_);
1286 }
1287
1288 CYTarget *CYTypeVoid::Replace(CYContext &context) {
1289     return $N1($V("Type"), $ CYString("v"));
1290 }
1291
1292 CYTarget *CYTypeVolatile::Replace_(CYContext &context, CYTarget *type) {
1293     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("volatile"))));
1294 }
1295
1296 CYTarget *CYTypedIdentifier::Replace(CYContext &context) {
1297     return modifier_->Replace(context, specifier_->Replace(context));
1298 }
1299
1300 CYTypeFunctionWith *CYTypedIdentifier::Function() {
1301     CYTypeModifier *&modifier(CYGetLast(modifier_));
1302     if (modifier == NULL)
1303         return NULL;
1304
1305     CYTypeFunctionWith *function(modifier->Function());
1306     if (function == NULL)
1307         return NULL;
1308
1309     modifier = NULL;
1310     return function;
1311 }
1312
1313 CYArgument *CYTypedParameter::Argument(CYContext &context) { $T(NULL)
1314     return $ CYArgument(typed_->Replace(context), next_->Argument(context));
1315 }
1316
1317 CYFunctionParameter *CYTypedParameter::Parameters(CYContext &context) { $T(NULL)
1318     return $ CYFunctionParameter($ CYBinding(typed_->identifier_ ?: context.Unique()), next_->Parameters(context));
1319 }
1320
1321 CYExpression *CYTypedParameter::TypeSignature(CYContext &context, CYExpression *prefix) { $T(prefix)
1322     return next_->TypeSignature(context, $ CYAdd(prefix, typed_->Replace(context)));
1323 }
1324
1325 CYForInitializer *CYVar::Replace(CYContext &context) {
1326     if (CYExpression *expression = bindings_->Replace(context, CYIdentifierVariable))
1327         return $E(expression);
1328     return $ CYEmpty();
1329 }
1330
1331 CYTarget *CYVariable::Replace(CYContext &context) {
1332     name_ = name_->Replace(context, CYIdentifierGlobal);
1333     return this;
1334 }
1335
1336 CYFunctionParameter *CYVariable::Parameter() const {
1337     return $ CYFunctionParameter($ CYBinding(name_));
1338 }
1339
1340 CYStatement *CYWhile::Replace(CYContext &context) {
1341     context.Replace(test_);
1342     context.ReplaceAll(code_);
1343     return this;
1344 }
1345
1346 CYStatement *CYWith::Replace(CYContext &context) {
1347     context.Replace(scope_);
1348     CYScope scope(true, context);
1349     scope.Damage();
1350     context.ReplaceAll(code_);
1351     scope.Close(context);
1352     return this;
1353 }
1354
1355 CYExpression *CYWord::PropertyName(CYContext &context) {
1356     return $S(this);
1357 }