Replace.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  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     context.Replace(lhs_);
 121     context.Replace(rhs_);
 122     return this;
 123 }
 124
 125 CYStatement *CYBlock::Return() {
 126     CYImplicitReturn(code_);
 127     return this;
 128 }
 129
 130 CYStatement *CYBlock::Replace(CYContext &context) {
 131     CYScope scope(true, context);
 132     context.ReplaceAll(code_);
 133     scope.Close(context);
 134
 135     if (code_ == NULL)
 136         return $ CYEmpty();
 137     return this;
 138 }
 139
 140 CYStatement *CYBreak::Replace(CYContext &context) {
 141     return this;
 142 }
 143
 144 CYTarget *CYCall::Replace(CYContext &context) {
 145     context.Replace(function_);
 146     arguments_->Replace(context);
 147     return this;
 148 }
 149
 150 namespace cy {
 151 namespace Syntax {
 152
 153 void Catch::Replace(CYContext &context) { $T()
 154     CYScope scope(true, context);
 155
 156     name_ = name_->Replace(context, CYIdentifierCatch);
 157
 158     context.ReplaceAll(code_);
 159     scope.Close(context);
 160 }
 161
 162 } }
 163
 164 CYTarget *CYClassExpression::Replace(CYContext &context) {
 165     CYBuilder builder;
 166
 167     CYIdentifier *super(context.Unique());
 168
 169     CYIdentifier *old(context.super_);
 170     context.super_ = super;
 171
 172     CYIdentifier *constructor(context.Unique());
 173     CYForEach (member, tail_->static_)
 174         member->Replace(context, builder, $V(constructor), true);
 175
 176     CYIdentifier *prototype(context.Unique());
 177     CYForEach (member, tail_->instance_)
 178         member->Replace(context, builder, $V(prototype), true);
 179
 180     if (tail_->constructor_ == NULL)
 181         tail_->constructor_ = $ CYFunctionExpression(NULL, NULL, NULL);
 182     tail_->constructor_ = CYSuperize(context, tail_->constructor_);
 183
 184     context.super_ = old;
 185
 186     return $C1($ CYFunctionExpression(NULL, $P($B(super)), $$
 187         ->* $ CYVar($B1($B(constructor, tail_->constructor_)))
 188         ->* $ CYVar($B1($B(prototype, $ CYFunctionExpression(NULL, NULL, NULL))))
 189         ->* $E($ CYAssign($M($V(prototype), $S("prototype")), $M($V(super), $S("prototype"))))
 190         ->* $E($ CYAssign($V(prototype), $N($V(prototype))))
 191         ->* CYDefineProperty($V(prototype), $S("constructor"), false, false, $ CYPropertyValue($S("value"), $V(constructor)))
 192         ->* $ CYVar(builder.bindings_)
 193         ->* builder.statements_
 194         ->* CYDefineProperty($V(constructor), $S("prototype"), false, false, $ CYPropertyValue($S("value"), $V(prototype)))
 195         ->* $ CYReturn($V(constructor))
 196     ), tail_->extends_ ?: $V($I("Object")));
 197 }
 198
 199 CYStatement *CYClassStatement::Replace(CYContext &context) {
 200     return $ CYVar($B1($B(name_, $ CYClassExpression(name_, tail_))));
 201 }
 202
 203 void CYClause::Replace(CYContext &context) { $T()
 204     context.Replace(value_);
 205     context.ReplaceAll(code_);
 206     next_->Replace(context);
 207 }
 208
 209 CYExpression *CYCompound::Replace(CYContext &context) {
 210     context.Replace(expression_);
 211     context.Replace(next_);
 212
 213     if (CYCompound *compound = dynamic_cast<CYCompound *>(expression_)) {
 214         expression_ = compound->expression_;
 215         compound->expression_ = compound->next_;
 216         compound->next_ = next_;
 217         next_ = compound;
 218     }
 219
 220     return this;
 221 }
 222
 223 CYFunctionParameter *CYCompound::Parameter() const {
 224     CYFunctionParameter *next(next_->Parameter());
 225     if (next == NULL)
 226         return NULL;
 227
 228     CYFunctionParameter *parameter(expression_->Parameter());
 229     if (parameter == NULL)
 230         return NULL;
 231
 232     parameter->SetNext(next);
 233     return parameter;
 234 }
 235
 236 CYFunctionParameter *CYComprehension::Parameters(CYContext &context) const { $T(NULL)
 237     CYFunctionParameter *next(next_->Parameters(context));
 238     if (CYFunctionParameter *parameter = Parameter(context)) {
 239         parameter->SetNext(next);
 240         return parameter;
 241     } else
 242         return next;
 243 }
 244
 245 CYStatement *CYComprehension::Replace(CYContext &context, CYStatement *statement) const {
 246     return next_ == NULL ? statement : next_->Replace(context, statement);
 247 }
 248
 249 CYExpression *CYComputed::PropertyName(CYContext &context) {
 250     return expression_;
 251 }
 252
 253 CYExpression *CYCondition::Replace(CYContext &context) {
 254     context.Replace(test_);
 255     context.Replace(true_);
 256     context.Replace(false_);
 257     return this;
 258 }
 259
 260 void CYContext::NonLocal(CYStatement *&statements) {
 261     CYContext &context(*this);
 262
 263     if (nextlocal_ != NULL && nextlocal_->identifier_ != NULL) {
 264         CYIdentifier *cye($I("$cye")->Replace(context, CYIdentifierGlobal));
 265         CYIdentifier *unique(nextlocal_->identifier_->Replace(context, CYIdentifierGlobal));
 266
 267         CYStatement *declare(
 268             $ CYVar($B1($B(unique, $ CYObject()))));
 269
 270         cy::Syntax::Catch *rescue(
 271             $ cy::Syntax::Catch(cye, $$
 272                 ->* $ CYIf($ CYIdentical($M($V(cye), $S("$cyk")), $V(unique)), $$
 273                     ->* $ CYReturn($M($V(cye), $S("$cyv"))))
 274                 ->* $ cy::Syntax::Throw($V(cye))));
 275
 276         context.Replace(declare);
 277         rescue->Replace(context);
 278
 279         statements = $$
 280             ->* declare
 281             ->* $ cy::Syntax::Try(statements, rescue, NULL);
 282     }
 283 }
 284
 285 CYIdentifier *CYContext::Unique() {
 286     return $ CYIdentifier($pool.strcat("$cy", $pool.itoa(unique_++), NULL));
 287 }
 288
 289 CYStatement *CYContinue::Replace(CYContext &context) {
 290     return this;
 291 }
 292
 293 CYStatement *CYDebugger::Replace(CYContext &context) {
 294     return this;
 295 }
 296
 297 CYTarget *CYBinding::Target(CYContext &context) {
 298     return $V(identifier_);
 299 }
 300
 301 CYAssignment *CYBinding::Replace(CYContext &context, CYIdentifierKind kind) {
 302     identifier_ = identifier_->Replace(context, kind);
 303
 304     if (initializer_ == NULL)
 305         return NULL;
 306
 307     CYAssignment *value($ CYAssign(Target(context), initializer_));
 308     initializer_ = NULL;
 309     return value;
 310 }
 311
 312 CYExpression *CYBindings::Replace(CYContext &context, CYIdentifierKind kind) { $T(NULL)
 313     CYAssignment *assignment(binding_->Replace(context, kind));
 314     CYExpression *compound(next_->Replace(context, kind));
 315
 316     if (assignment != NULL)
 317         if (compound == NULL)
 318             compound = assignment;
 319         else
 320             compound = $ CYCompound(assignment, compound);
 321     return compound;
 322 }
 323
 324 CYFunctionParameter *CYBindings::Parameter(CYContext &context) { $T(NULL)
 325     return $ CYFunctionParameter($ CYBinding(binding_->identifier_), next_->Parameter(context));
 326 }
 327
 328 CYArgument *CYBindings::Argument(CYContext &context) { $T(NULL)
 329     return $ CYArgument(binding_->initializer_, next_->Argument(context));
 330 }
 331
 332 CYTarget *CYDirectMember::Replace(CYContext &context) {
 333     context.Replace(object_);
 334     context.Replace(property_);
 335     return this;
 336 }
 337
 338 CYStatement *CYDoWhile::Replace(CYContext &context) {
 339     context.Replace(test_);
 340     context.ReplaceAll(code_);
 341     return this;
 342 }
 343
 344 void CYElementSpread::Replace(CYContext &context) {
 345     context.Replace(value_);
 346 }
 347
 348 void CYElementValue::Replace(CYContext &context) {
 349     context.Replace(value_);
 350 }
 351
 352 CYForInitializer *CYEmpty::Replace(CYContext &context) {
 353     return NULL;
 354 }
 355
 356 CYTarget *CYEncodedType::Replace(CYContext &context) {
 357     return typed_->Replace(context);
 358 }
 359
 360 CYTarget *CYEval::Replace(CYContext &context) {
 361     context.scope_->Damage();
 362     if (arguments_ != NULL)
 363         arguments_->value_ = $C1($M($V("Cycript"), $S("compile")), arguments_->value_);
 364     return $C($V("eval"), arguments_);
 365 }
 366
 367 CYStatement *CYExpress::Return() {
 368     return $ CYReturn(expression_);
 369 }
 370
 371 CYForInitializer *CYExpress::Replace(CYContext &context) {
 372     context.Replace(expression_);
 373     return this;
 374 }
 375
 376 CYTarget *CYExpression::AddArgument(CYContext &context, CYExpression *value) {
 377     return $C1(this, value);
 378 }
 379
 380 CYFunctionParameter *CYExpression::Parameter() const {
 381     return NULL;
 382 }
 383
 384 CYStatement *CYExternal::Replace(CYContext &context) {
 385     return $E($ CYAssign($V(typed_->identifier_), $C1(typed_->Replace(context), $C2($V("dlsym"), $V("RTLD_DEFAULT"), $S(typed_->identifier_->Word())))));
 386 }
 387
 388 CYNumber *CYFalse::Number(CYContext &context) {
 389     return $D(0);
 390 }
 391
 392 CYString *CYFalse::String(CYContext &context) {
 393     return $S("false");
 394 }
 395
 396 CYExpression *CYFatArrow::Replace(CYContext &context) {
 397     CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
 398     function->this_.SetNext(context.this_);
 399     return function;
 400 }
 401
 402 void CYFinally::Replace(CYContext &context) { $T()
 403     CYScope scope(true, context);
 404     context.ReplaceAll(code_);
 405     scope.Close(context);
 406 }
 407
 408 CYStatement *CYFor::Replace(CYContext &context) {
 409     CYScope outer(true, context);
 410     context.Replace(initializer_);
 411
 412     context.Replace(test_);
 413
 414     {
 415         CYScope inner(true, context);
 416         context.ReplaceAll(code_);
 417         inner.Close(context);
 418     }
 419
 420     context.Replace(increment_);
 421
 422     outer.Close(context);
 423     return this;
 424 }
 425
 426 CYStatement *CYForLexical::Initialize(CYContext &context, CYExpression *value) {
 427     if (value == NULL) {
 428         if (binding_->initializer_ == NULL)
 429             return NULL;
 430         value = binding_->initializer_;
 431     }
 432
 433     return $ CYLexical(constant_, $B1($ CYBinding(binding_->identifier_, value)));
 434 }
 435
 436 CYTarget *CYForLexical::Replace(CYContext &context) {
 437     _assert(binding_->Replace(context, CYIdentifierLexical) == NULL);
 438     return binding_->Target(context);
 439 }
 440
 441 CYStatement *CYForIn::Replace(CYContext &context) {
 442     CYScope scope(true, context);
 443     context.Replace(initializer_);
 444     context.Replace(iterable_);
 445     context.ReplaceAll(code_);
 446     scope.Close(context);
 447     return this;
 448 }
 449
 450 CYStatement *CYForInitialized::Replace(CYContext &context) {
 451     CYAssignment *assignment(binding_->Replace(context, CYIdentifierVariable));
 452     return $ CYBlock($$
 453         ->* (assignment == NULL ? NULL : $ CYExpress(assignment))
 454         ->* $ CYForIn(binding_->Target(context), iterable_, code_));
 455 }
 456
 457 CYFunctionParameter *CYForInComprehension::Parameter(CYContext &context) const {
 458     return $ CYFunctionParameter(binding_);
 459 }
 460
 461 CYStatement *CYForInComprehension::Replace(CYContext &context, CYStatement *statement) const {
 462     return $ CYForIn(binding_->Target(context), iterable_, CYComprehension::Replace(context, statement));
 463 }
 464
 465 CYStatement *CYForOf::Replace(CYContext &context) {
 466     CYIdentifier *item(context.Unique()), *list(context.Unique());
 467
 468     return $ CYBlock($$
 469         ->* initializer_->Initialize(context, NULL)
 470         ->* $ CYLexical(false, $B2($B(list, iterable_), $B(item)))
 471         ->* $ CYForIn($V(item), $V(list), $ CYBlock($$
 472             ->* initializer_->Initialize(context, $M($V(list), $V(item)))
 473             ->* code_
 474     )));
 475 }
 476
 477 CYFunctionParameter *CYForOfComprehension::Parameter(CYContext &context) const {
 478     return $ CYFunctionParameter(binding_);
 479 }
 480
 481 CYStatement *CYForOfComprehension::Replace(CYContext &context, CYStatement *statement) const {
 482     CYIdentifier *cys(context.Unique());
 483
 484     return $ CYBlock($$
 485         ->* $ CYLexical(false, $B1($B(cys, iterable_)))
 486         ->* $ CYForIn(binding_->Target(context), $V(cys), $ CYBlock($$
 487             ->* $E($ CYAssign(binding_->Target(context), $M($V(cys), binding_->Target(context))))
 488             ->* CYComprehension::Replace(context, statement)
 489     )));
 490 }
 491
 492 CYStatement *CYForVariable::Initialize(CYContext &context, CYExpression *value) {
 493     if (value == NULL) {
 494         if (binding_->initializer_ == NULL)
 495             return NULL;
 496         value = binding_->initializer_;
 497     }
 498
 499     return $ CYVar($B1($ CYBinding(binding_->identifier_, value)));
 500 }
 501
 502 CYTarget *CYForVariable::Replace(CYContext &context) {
 503     _assert(binding_->Replace(context, CYIdentifierVariable) == NULL);
 504     return binding_->Target(context);
 505 }
 506
 507 // XXX: this is evil evil black magic. don't ask, don't tell... don't believe!
 508 #define MappingSet "0etnirsoalfucdphmgyvbxTwSNECAFjDLkMOIBPqzRH$_WXUVGYKQJZ"
 509 //#define MappingSet "0abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_"
 510
 511 void CYFunction::Replace(CYContext &context) {
 512     CYThisScope *_this(context.this_);
 513     context.this_ = &this_;
 514     context.this_ = CYGetLast(context.this_);
 515
 516     CYIdentifier *super(context.super_);
 517     context.super_ = super_;
 518
 519     CYNonLocal *nonlocal(context.nonlocal_);
 520     CYNonLocal *nextlocal(context.nextlocal_);
 521
 522     bool localize;
 523     if (nonlocal_ != NULL) {
 524         localize = false;
 525         context.nonlocal_ = nonlocal_;
 526     } else {
 527         localize = true;
 528         nonlocal_ = $ CYNonLocal();
 529         context.nextlocal_ = nonlocal_;
 530     }
 531
 532     CYScope scope(!localize, context);
 533
 534     $I("arguments")->Replace(context, CYIdentifierMagic);
 535
 536     parameters_->Replace(context, code_);
 537
 538     context.ReplaceAll(code_);
 539
 540     if (implicit_)
 541         CYImplicitReturn(code_);
 542
 543     if (CYIdentifier *identifier = this_.identifier_) {
 544         context.scope_->Declare(context, identifier, CYIdentifierVariable);
 545         code_ = $$
 546             ->* $E($ CYAssign($V(identifier), $ CYThis()))
 547             ->* code_;
 548     }
 549
 550     if (localize)
 551         context.NonLocal(code_);
 552
 553     context.nextlocal_ = nextlocal;
 554     context.nonlocal_ = nonlocal;
 555
 556     context.super_ = super;
 557     context.this_ = _this;
 558
 559     scope.Close(context, code_);
 560 }
 561
 562 CYTarget *CYFunctionExpression::Replace(CYContext &context) {
 563     CYScope scope(false, context);
 564     if (name_ != NULL)
 565         name_ = name_->Replace(context, CYIdentifierOther);
 566
 567     CYFunction::Replace(context);
 568     scope.Close(context);
 569     return this;
 570 }
 571
 572 void CYFunctionParameter::Replace(CYContext &context, CYStatement *&statements) { $T()
 573     CYAssignment *assignment(binding_->Replace(context, CYIdentifierArgument));
 574
 575     next_->Replace(context, statements);
 576
 577     if (assignment != NULL)
 578         statements = $$
 579             ->* $ CYIf($ CYIdentical($ CYTypeOf(binding_->Target(context)), $S("undefined")), $$
 580                 ->* $E(assignment))
 581             ->* statements;
 582 }
 583
 584 CYStatement *CYFunctionStatement::Replace(CYContext &context) {
 585     name_ = name_->Replace(context, CYIdentifierOther);
 586     CYFunction::Replace(context);
 587     return this;
 588 }
 589
 590 CYIdentifier *CYIdentifier::Replace(CYContext &context, CYIdentifierKind kind) {
 591     if (next_ == this)
 592         return this;
 593     if (next_ != NULL)
 594         return next_->Replace(context, kind);
 595     next_ = context.scope_->Declare(context, this, kind)->identifier_;
 596     return next_;
 597 }
 598
 599 CYStatement *CYIf::Return() {
 600     CYImplicitReturn(true_);
 601     CYImplicitReturn(false_);
 602     return this;
 603 }
 604
 605 CYStatement *CYIf::Replace(CYContext &context) {
 606     context.Replace(test_);
 607     context.ReplaceAll(true_);
 608     context.ReplaceAll(false_);
 609     return this;
 610 }
 611
 612 CYFunctionParameter *CYIfComprehension::Parameter(CYContext &context) const {
 613     return NULL;
 614 }
 615
 616 CYStatement *CYIfComprehension::Replace(CYContext &context, CYStatement *statement) const {
 617     return $ CYIf(test_, CYComprehension::Replace(context, statement));
 618 }
 619
 620 CYStatement *CYImport::Replace(CYContext &context) {
 621     return $ CYVar($B1($B($I(module_->part_->Word()), $C1($V("require"), module_->Replace(context, "/")))));
 622 }
 623
 624 CYStatement *CYImportDeclaration::Replace(CYContext &context) {
 625     CYIdentifier *module(context.Unique());
 626
 627     CYList<CYStatement> statements;
 628     CYForEach (specifier, specifiers_)
 629         statements->*specifier->Replace(context, module);
 630
 631     return $ CYBlock($$
 632         ->* $ CYLexical(false, $B1($B(module, $C1($V("require"), module_))))
 633         ->* statements);
 634 }
 635
 636 CYStatement *CYImportSpecifier::Replace(CYContext &context, CYIdentifier *module) {
 637     binding_ = binding_->Replace(context, CYIdentifierLexical);
 638
 639     CYExpression *import($V(module));
 640     if (name_ != NULL)
 641         import = $M(import, $S(name_));
 642     return $E($ CYAssign($V(binding_), import));
 643 }
 644
 645 CYTarget *CYIndirect::Replace(CYContext &context) {
 646     return $M(rhs_, $S("$cyi"));
 647 }
 648
 649 CYTarget *CYIndirectMember::Replace(CYContext &context) {
 650     return $M($ CYIndirect(object_), property_);
 651 }
 652
 653 CYExpression *CYInfix::Replace(CYContext &context) {
 654     context.Replace(lhs_);
 655     context.Replace(rhs_);
 656     return this;
 657 }
 658
 659 CYStatement *CYLabel::Replace(CYContext &context) {
 660     context.Replace(statement_);
 661     return this;
 662 }
 663
 664 CYTarget *CYLambda::Replace(CYContext &context) {
 665     return $N2($V("Functor"), $ CYFunctionExpression(NULL, parameters_->Parameters(context), code_), parameters_->TypeSignature(context, typed_->Replace(context)));
 666 }
 667
 668 CYForInitializer *CYLexical::Replace(CYContext &context) {
 669     if (CYExpression *expression = bindings_->Replace(context, CYIdentifierLexical))
 670         return $E(expression);
 671     return $ CYEmpty();
 672 }
 673
 674 CYFunctionExpression *CYMethod::Constructor() {
 675     return NULL;
 676 }
 677
 678 void CYMethod::Replace(CYContext &context) {
 679     CYFunction::Replace(context);
 680 }
 681
 682 CYString *CYModule::Replace(CYContext &context, const char *separator) const {
 683     if (next_ == NULL)
 684         return $ CYString(part_);
 685     return $ CYString($pool.strcat(next_->Replace(context, separator)->Value(), separator, part_->Word(), NULL));
 686 }
 687
 688 CYExpression *CYMultiply::Replace(CYContext &context) {
 689     CYInfix::Replace(context);
 690
 691     if (CYNumber *lhn = lhs_->Number(context))
 692         if (CYNumber *rhn = rhs_->Number(context))
 693             return $D(lhn->Value() * rhn->Value());
 694
 695     return this;
 696 }
 697
 698 namespace cy {
 699 namespace Syntax {
 700
 701 CYTarget *New::AddArgument(CYContext &context, CYExpression *value) {
 702     CYSetLast(arguments_) = $ CYArgument(value);
 703     return this;
 704 }
 705
 706 CYTarget *New::Replace(CYContext &context) {
 707     context.Replace(constructor_);
 708     arguments_->Replace(context);
 709     return this;
 710 }
 711
 712 } }
 713
 714 CYNumber *CYNull::Number(CYContext &context) {
 715     return $D(0);
 716 }
 717
 718 CYString *CYNull::String(CYContext &context) {
 719     return $S("null");
 720 }
 721
 722 CYNumber *CYNumber::Number(CYContext &context) {
 723     return this;
 724 }
 725
 726 CYString *CYNumber::String(CYContext &context) {
 727     // XXX: there is a precise algorithm for this
 728     return $S($pool.sprintf(24, "%.17g", Value()));
 729 }
 730
 731 CYExpression *CYNumber::PropertyName(CYContext &context) {
 732     return String(context);
 733 }
 734
 735 CYTarget *CYObject::Replace(CYContext &context) {
 736     CYBuilder builder;
 737     if (properties_ != NULL)
 738         properties_ = properties_->ReplaceAll(context, builder, $ CYThis(), false);
 739
 740     if (builder) {
 741         return $C1($M($ CYFunctionExpression(NULL, builder.bindings_->Parameter(context),
 742             builder.statements_
 743                 ->* $ CYReturn($ CYThis())
 744         ), $S("call")), this, builder.bindings_->Argument(context));
 745     }
 746
 747     CYForEach (property, properties_)
 748         property->Replace(context);
 749     return this;
 750 }
 751
 752 CYTarget *CYParenthetical::Replace(CYContext &context) {
 753     // XXX: return expression_;
 754     context.Replace(expression_);
 755     return this;
 756 }
 757
 758 CYExpression *CYPostfix::Replace(CYContext &context) {
 759     context.Replace(lhs_);
 760     return this;
 761 }
 762
 763 CYExpression *CYPrefix::Replace(CYContext &context) {
 764     context.Replace(rhs_);
 765     return this;
 766 }
 767
 768 CYProperty *CYProperty::ReplaceAll(CYContext &context, CYBuilder &builder, CYExpression *self, bool update) {
 769     update |= Update();
 770     if (update)
 771         Replace(context, builder, self, false);
 772     if (next_ != NULL)
 773         next_ = next_->ReplaceAll(context, builder, self, update);
 774     return update ? next_ : this;
 775 }
 776
 777 void CYProperty::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, bool protect) {
 778     CYExpression *name(name_->PropertyName(context));
 779     if (name_->Computed()) {
 780         CYIdentifier *unique(context.Unique());
 781         builder.bindings_
 782             ->* $B1($B(unique, name));
 783         name = $V(unique);
 784     }
 785
 786     Replace(context, builder, self, name, protect);
 787 }
 788
 789 bool CYProperty::Update() const {
 790     return name_->Computed();
 791 }
 792
 793 void CYPropertyGetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 794     CYIdentifier *unique(context.Unique());
 795     builder.bindings_
 796         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 797     builder.statements_
 798         ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("get"), $V(unique)));
 799 }
 800
 801 CYFunctionExpression *CYPropertyMethod::Constructor() {
 802     return name_->Constructor() ? $ CYFunctionExpression(NULL, parameters_, code_) : NULL;
 803 }
 804
 805 void CYPropertyMethod::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 806     CYIdentifier *unique(context.Unique());
 807     builder.bindings_
 808         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 809     builder.statements_
 810         ->* (!protect ? $E($ CYAssign($M(self, name), $V(unique))) :
 811             CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("value"), $V(unique), $ CYPropertyValue($S("writable"), $ CYTrue()))));
 812 }
 813
 814 bool CYPropertyMethod::Update() const {
 815     return true;
 816 }
 817
 818 void CYPropertySetter::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 819     CYIdentifier *unique(context.Unique());
 820     builder.bindings_
 821         ->* $B1($B(unique, CYSuperize(context, $ CYFunctionExpression(NULL, parameters_, code_))));
 822     builder.statements_
 823         ->* CYDefineProperty(self, name, true, !protect, $ CYPropertyValue($S("set"), $V(unique)));
 824 }
 825
 826 void CYPropertyValue::Replace(CYContext &context, CYBuilder &builder, CYExpression *self, CYExpression *name, bool protect) {
 827     _assert(!protect);
 828     CYIdentifier *unique(context.Unique());
 829     builder.bindings_
 830         ->* $B1($B(unique, value_));
 831     builder.statements_
 832         ->* $E($ CYAssign($M(self, name), $V(unique)));
 833 }
 834
 835 void CYPropertyValue::Replace(CYContext &context) {
 836     context.Replace(value_);
 837 }
 838
 839 void CYScript::Replace(CYContext &context) {
 840     CYScope scope(false, context);
 841     context.scope_->Damage();
 842
 843     context.nextlocal_ = $ CYNonLocal();
 844     context.ReplaceAll(code_);
 845     context.NonLocal(code_);
 846
 847     scope.Close(context, code_);
 848
 849     unsigned offset(0);
 850
 851     for (std::vector<CYIdentifier *>::const_iterator i(context.replace_.begin()); i != context.replace_.end(); ++i) {
 852         const char *name;
 853         if (context.options_.verbose_)
 854             name = $pool.strcat("$", $pool.itoa(offset++), NULL);
 855         else {
 856             char id[8];
 857             id[7] = '\0';
 858
 859           id:
 860             unsigned position(7), local(offset++ + 1);
 861
 862             do {
 863                 unsigned index(local % (sizeof(MappingSet) - 1));
 864                 local /= sizeof(MappingSet) - 1;
 865                 id[--position] = MappingSet[index];
 866             } while (local != 0);
 867
 868             if (scope.Lookup(context, id + position) != NULL)
 869                 goto id;
 870             // XXX: at some point, this could become a keyword
 871
 872             name = $pool.strmemdup(id + position, 7 - position);
 873         }
 874
 875         CYIdentifier *identifier(*i);
 876         _assert(identifier->next_ == identifier);
 877         identifier->next_ = $I(name);
 878     }
 879 }
 880
 881 CYTarget *CYResolveMember::Replace(CYContext &context) {
 882     return $M($M(object_, $S("$cyr")), property_);
 883 }
 884
 885 CYStatement *CYReturn::Replace(CYContext &context) {
 886     if (context.nonlocal_ != NULL) {
 887         CYProperty *value(value_ == NULL ? NULL : $ CYPropertyValue($S("$cyv"), value_));
 888         return $ cy::Syntax::Throw($ CYObject(
 889             $ CYPropertyValue($S("$cyk"), $V(context.nonlocal_->Target(context)), value)
 890         ));
 891     }
 892
 893     context.Replace(value_);
 894     return this;
 895 }
 896
 897 CYTarget *CYRubyBlock::Replace(CYContext &context) {
 898     return call_->AddArgument(context, proc_->Replace(context));
 899 }
 900
 901 CYTarget *CYRubyBlock::AddArgument(CYContext &context, CYExpression *value) {
 902     return Replace(context)->AddArgument(context, value);
 903 }
 904
 905 CYTarget *CYRubyProc::Replace(CYContext &context) {
 906     CYFunctionExpression *function($ CYFunctionExpression(NULL, parameters_, code_));
 907     function = CYNonLocalize(context, function);
 908     function->implicit_ = true;
 909     return function;
 910 }
 911
 912 CYScope::CYScope(bool transparent, CYContext &context) :
 913     transparent_(transparent),
 914     parent_(context.scope_),
 915     damaged_(false),
 916     shadow_(NULL),
 917     internal_(NULL)
 918 {
 919     _assert(!transparent_ || parent_ != NULL);
 920     context.scope_ = this;
 921 }
 922
 923 void CYScope::Damage() {
 924     damaged_ = true;
 925     if (parent_ != NULL)
 926         parent_->Damage();
 927 }
 928
 929 CYIdentifierFlags *CYScope::Lookup(CYContext &context, const char *word) {
 930     CYForEach (i, internal_)
 931         if (strcmp(i->identifier_->Word(), word) == 0)
 932             return i;
 933     return NULL;
 934 }
 935
 936 CYIdentifierFlags *CYScope::Lookup(CYContext &context, CYIdentifier *identifier) {
 937     return Lookup(context, identifier->Word());
 938 }
 939
 940 CYIdentifierFlags *CYScope::Declare(CYContext &context, CYIdentifier *identifier, CYIdentifierKind kind) {
 941     _assert(identifier->next_ == NULL || identifier->next_ == identifier);
 942
 943     CYIdentifierFlags *existing(Lookup(context, identifier));
 944     if (existing == NULL)
 945         internal_ = $ CYIdentifierFlags(identifier, kind, internal_);
 946     ++internal_->count_;
 947     if (existing == NULL)
 948         return internal_;
 949
 950     if (kind == CYIdentifierGlobal);
 951     else if (existing->kind_ == CYIdentifierGlobal || existing->kind_ == CYIdentifierMagic)
 952         existing->kind_ = kind;
 953     else if (existing->kind_ == CYIdentifierLexical || kind == CYIdentifierLexical)
 954         _assert(false); // XXX: throw new SyntaxError()
 955
 956     return existing;
 957 }
 958
 959 void CYScope::Merge(CYContext &context, const CYIdentifierFlags *flags) {
 960     _assert(flags->identifier_->next_ == flags->identifier_);
 961     CYIdentifierFlags *existing(Declare(context, flags->identifier_, flags->kind_));
 962     flags->identifier_->next_ = existing->identifier_;
 963
 964     existing->count_ += flags->count_;
 965     if (existing->offset_ < flags->offset_)
 966         existing->offset_ = flags->offset_;
 967 }
 968
 969 void CYScope::Close(CYContext &context, CYStatement *&statements) {
 970     Close(context);
 971
 972     CYList<CYBindings> bindings;
 973
 974     CYForEach (i, internal_)
 975         if (i->kind_ == CYIdentifierVariable)
 976             bindings
 977                 ->* $ CYBindings($ CYBinding(i->identifier_));
 978
 979     if (bindings) {
 980         CYVar *var($ CYVar(bindings));
 981         var->SetNext(statements);
 982         statements = var;
 983     }
 984 }
 985
 986 void CYScope::Close(CYContext &context) {
 987     context.scope_ = parent_;
 988
 989     CYForEach (i, internal_) {
 990         _assert(i->identifier_->next_ == i->identifier_);
 991     switch (i->kind_) {
 992         case CYIdentifierArgument: {
 993             _assert(!transparent_);
 994         } break;
 995
 996         case CYIdentifierLexical: {
 997             if (!damaged_) {
 998                 CYIdentifier *replace(context.Unique());
 999                 replace->next_ = replace;
1000                 i->identifier_->next_ = replace;
1001                 i->identifier_ = replace;
1002             }
1003
1004             if (!transparent_)
1005                 i->kind_ = CYIdentifierVariable;
1006             else
1007                 parent_->Declare(context, i->identifier_, CYIdentifierVariable);
1008         } break;
1009
1010         case CYIdentifierVariable: {
1011             if (transparent_) {
1012                 parent_->Declare(context, i->identifier_, i->kind_);
1013                 i->kind_ = CYIdentifierGlobal;
1014             }
1015         } break;
1016     default:; } }
1017
1018     if (damaged_)
1019         return;
1020
1021     typedef std::multimap<unsigned, CYIdentifier *> CYIdentifierOffsetMap;
1022     CYIdentifierOffsetMap offsets;
1023
1024     CYForEach (i, internal_) {
1025         _assert(i->identifier_->next_ == i->identifier_);
1026     switch (i->kind_) {
1027         case CYIdentifierArgument:
1028         case CYIdentifierVariable:
1029             offsets.insert(CYIdentifierOffsetMap::value_type(i->offset_, i->identifier_));
1030         break;
1031     default:; } }
1032
1033     unsigned offset(0);
1034
1035     for (CYIdentifierOffsetMap::const_iterator i(offsets.begin()); i != offsets.end(); ++i) {
1036         if (offset < i->first)
1037             offset = i->first;
1038         CYIdentifier *identifier(i->second);
1039
1040         if (offset >= context.replace_.size())
1041             context.replace_.resize(offset + 1, NULL);
1042         CYIdentifier *&replace(context.replace_[offset++]);
1043
1044         if (replace == NULL)
1045             replace = identifier;
1046         else {
1047             _assert(replace->next_ == replace);
1048             identifier->next_ = replace;
1049         }
1050     }
1051
1052     if (parent_ == NULL)
1053         return;
1054
1055     CYForEach (i, internal_) {
1056     switch (i->kind_) {
1057         case CYIdentifierGlobal: {
1058             if (i->offset_ < offset)
1059                 i->offset_ = offset;
1060             parent_->Merge(context, i);
1061         } break;
1062     default:; } }
1063 }
1064
1065 CYElementValue *CYSpan::Replace(CYContext &context) { $T(NULL)
1066     return $ CYElementValue(expression_, $ CYElementValue(string_, next_->Replace(context)));
1067 }
1068
1069 CYStatement *CYStatement::Return() {
1070     return this;
1071 }
1072
1073 CYString *CYString::Concat(CYContext &context, CYString *rhs) const {
1074     size_t size(size_ + rhs->size_);
1075     char *value($ char[size + 1]);
1076     memcpy(value, value_, size_);
1077     memcpy(value + size_, rhs->value_, rhs->size_);
1078     value[size] = '\0';
1079     return $S(value, size);
1080 }
1081
1082 CYNumber *CYString::Number(CYContext &context) {
1083     // XXX: there is a precise algorithm for this
1084     return NULL;
1085 }
1086
1087 CYExpression *CYString::PropertyName(CYContext &context) {
1088     return this;
1089 }
1090
1091 CYString *CYString::String(CYContext &context) {
1092     return this;
1093 }
1094
1095 CYStatement *CYStructDefinition::Replace(CYContext &context) {
1096     CYTarget *target(tail_->Replace(context));
1097     if (name_ != NULL)
1098         target = $C1($M(target, $S("withName")), $S(name_->Word()));
1099     return $ CYLexical(false, $B1($B($I($pool.strcat(name_->Word(), "$cy", NULL)), target)));
1100 }
1101
1102 CYTarget *CYStructTail::Replace(CYContext &context) {
1103     CYList<CYElementValue> types;
1104     CYList<CYElementValue> names;
1105
1106     CYForEach (field, fields_) {
1107         CYTypedIdentifier *typed(field->typed_);
1108         types->*$ CYElementValue(typed->Replace(context));
1109
1110         CYExpression *name;
1111         if (typed->identifier_ == NULL)
1112             name = NULL;
1113         else
1114             name = $S(typed->identifier_->Word());
1115         names->*$ CYElementValue(name);
1116     }
1117
1118     return $N2($V("Type"), $ CYArray(types), $ CYArray(names));
1119 }
1120
1121 CYTarget *CYSuperAccess::Replace(CYContext &context) {
1122     return $C1($M($M($M($V(context.super_), $S("prototype")), property_), $S("bind")), $ CYThis());
1123 }
1124
1125 CYTarget *CYSuperCall::Replace(CYContext &context) {
1126     return $C($C1($M($V(context.super_), $S("bind")), $ CYThis()), arguments_);
1127 }
1128
1129 CYTarget *CYSymbol::Replace(CYContext &context) {
1130     return $C1($M($V("Symbol"), $S("for")), $S(name_));
1131 }
1132
1133 CYStatement *CYSwitch::Replace(CYContext &context) {
1134     context.Replace(value_);
1135     clauses_->Replace(context);
1136     return this;
1137 }
1138
1139 CYStatement *CYTarget::Initialize(CYContext &context, CYExpression *value) {
1140     if (value == NULL)
1141         return NULL;
1142     return $E($ CYAssign(this, value));
1143 }
1144
1145 CYTarget *CYTemplate::Replace(CYContext &context) {
1146     return $C2($M($M($M($V("String"), $S("prototype")), $S("concat")), $S("apply")), $S(""), $ CYArray($ CYElementValue(string_, spans_->Replace(context))));
1147 }
1148
1149 CYTarget *CYThis::Replace(CYContext &context) {
1150     if (context.this_ != NULL)
1151         return $V(context.this_->Identifier(context));
1152     return this;
1153 }
1154
1155 namespace cy {
1156 namespace Syntax {
1157
1158 CYStatement *Throw::Replace(CYContext &context) {
1159     context.Replace(value_);
1160     return this;
1161 }
1162
1163 } }
1164
1165 CYTarget *CYTrivial::Replace(CYContext &context) {
1166     return this;
1167 }
1168
1169 CYNumber *CYTrue::Number(CYContext &context) {
1170     return $D(1);
1171 }
1172
1173 CYString *CYTrue::String(CYContext &context) {
1174     return $S("true");
1175 }
1176
1177 namespace cy {
1178 namespace Syntax {
1179
1180 CYStatement *Try::Replace(CYContext &context) {
1181     CYScope scope(true, context);
1182     context.ReplaceAll(code_);
1183     scope.Close(context);
1184
1185     catch_->Replace(context);
1186     finally_->Replace(context);
1187     return this;
1188 }
1189
1190 } }
1191
1192 CYTarget *CYTypeArrayOf::Replace_(CYContext &context, CYTarget *type) {
1193     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("arrayOf")), $ CYArgument(size_)));
1194 }
1195
1196 CYTarget *CYTypeBlockWith::Replace_(CYContext &context, CYTarget *type) {
1197     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("blockWith")), parameters_->Argument(context)));
1198 }
1199
1200 CYTarget *CYTypeCharacter::Replace(CYContext &context) {
1201     switch (signing_) {
1202         case CYTypeNeutral: return $V("char");
1203         case CYTypeSigned: return $V("schar");
1204         case CYTypeUnsigned: return $V("uchar");
1205         default: _assert(false);
1206     }
1207 }
1208
1209 CYTarget *CYTypeConstant::Replace_(CYContext &context, CYTarget *type) {
1210     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("constant"))));
1211 }
1212
1213 CYStatement *CYTypeDefinition::Replace(CYContext &context) {
1214     CYIdentifier *identifier(typed_->identifier_);
1215     typed_->identifier_ = NULL;
1216     return $ CYLexical(false, $B1($B(identifier, $ CYTypeExpression(typed_))));
1217 }
1218
1219 CYTarget *CYTypeError::Replace(CYContext &context) {
1220     _assert(false);
1221     return NULL;
1222 }
1223
1224 CYTarget *CYTypeExpression::Replace(CYContext &context) {
1225     return typed_->Replace(context);
1226 }
1227
1228 CYTarget *CYTypeIntegral::Replace(CYContext &context) {
1229     bool u(signing_ == CYTypeUnsigned);
1230     switch (length_) {
1231         case 0: return $V(u ? "ushort" : "short");
1232         case 1: return $V(u ? "uint" : "int");
1233         case 2: return $V(u ? "ulong" : "long");
1234         case 3: return $V(u ? "ulonglong" : "longlong");
1235         default: _assert(false);
1236     }
1237 }
1238
1239 CYTarget *CYTypeModifier::Replace(CYContext &context, CYTarget *type) { $T(type)
1240     return Replace_(context, type);
1241 }
1242
1243 CYTarget *CYTypeFunctionWith::Replace_(CYContext &context, CYTarget *type) {
1244     CYList<CYArgument> arguments(parameters_->Argument(context));
1245     if (variadic_)
1246         arguments->*$C_($ CYNull());
1247     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("functionWith")), arguments));
1248 }
1249
1250 CYTarget *CYTypePointerTo::Replace_(CYContext &context, CYTarget *type) {
1251     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("pointerTo"))));
1252 }
1253
1254 CYTarget *CYTypeReference::Replace(CYContext &context) {
1255     return $V($pool.strcat(name_->Word(), "$cy", NULL));
1256 }
1257
1258 CYTarget *CYTypeStruct::Replace(CYContext &context) {
1259     CYTarget *target(tail_->Replace(context));
1260     if (name_ != NULL)
1261         target = $C1($M(target, $S("withName")), $S(name_->Word()));
1262     return target;
1263 }
1264
1265 CYTarget *CYTypeVariable::Replace(CYContext &context) {
1266     return $V(name_);
1267 }
1268
1269 CYTarget *CYTypeVoid::Replace(CYContext &context) {
1270     return $N1($V("Type"), $ CYString("v"));
1271 }
1272
1273 CYTarget *CYTypeVolatile::Replace_(CYContext &context, CYTarget *type) {
1274     return next_->Replace(context, $ CYCall($ CYDirectMember(type, $ CYString("volatile"))));
1275 }
1276
1277 CYTarget *CYTypedIdentifier::Replace(CYContext &context) {
1278     return modifier_->Replace(context, specifier_->Replace(context));
1279 }
1280
1281 CYTypeFunctionWith *CYTypedIdentifier::Function() {
1282     CYTypeModifier *&modifier(CYGetLast(modifier_));
1283     if (modifier == NULL)
1284         return NULL;
1285
1286     CYTypeFunctionWith *function(modifier->Function());
1287     if (function == NULL)
1288         return NULL;
1289
1290     modifier = NULL;
1291     return function;
1292 }
1293
1294 CYArgument *CYTypedParameter::Argument(CYContext &context) { $T(NULL)
1295     return $ CYArgument(typed_->Replace(context), next_->Argument(context));
1296 }
1297
1298 CYFunctionParameter *CYTypedParameter::Parameters(CYContext &context) { $T(NULL)
1299     return $ CYFunctionParameter($ CYBinding(typed_->identifier_ ?: context.Unique()), next_->Parameters(context));
1300 }
1301
1302 CYExpression *CYTypedParameter::TypeSignature(CYContext &context, CYExpression *prefix) { $T(prefix)
1303     return next_->TypeSignature(context, $ CYAdd(prefix, typed_->Replace(context)));
1304 }
1305
1306 CYForInitializer *CYVar::Replace(CYContext &context) {
1307     if (CYExpression *expression = bindings_->Replace(context, CYIdentifierVariable))
1308         return $E(expression);
1309     return $ CYEmpty();
1310 }
1311
1312 CYTarget *CYVariable::Replace(CYContext &context) {
1313     name_ = name_->Replace(context, CYIdentifierGlobal);
1314     return this;
1315 }
1316
1317 CYFunctionParameter *CYVariable::Parameter() const {
1318     return $ CYFunctionParameter($ CYBinding(name_));
1319 }
1320
1321 CYStatement *CYWhile::Replace(CYContext &context) {
1322     context.Replace(test_);
1323     context.ReplaceAll(code_);
1324     return this;
1325 }
1326
1327 CYStatement *CYWith::Replace(CYContext &context) {
1328     context.Replace(scope_);
1329     CYScope scope(true, context);
1330     scope.Damage();
1331     context.ReplaceAll(code_);
1332     scope.Close(context);
1333     return this;
1334 }
1335
1336 CYExpression *CYWord::PropertyName(CYContext &context) {
1337     return $S(this);
1338 }