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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 part of dart_backend; | |
| 6 | |
| 7 class LocalPlaceholder { | |
| 8 final String identifier; | |
| 9 final Set<Node> nodes; | |
| 10 LocalPlaceholder(this.identifier) : nodes = new Set<Node>(); | |
| 11 int get hashCode => identifier.hashCode; | |
| 12 String toString() => 'local_placeholder[id($identifier), nodes($nodes)]'; | |
| 13 } | |
| 14 | |
| 15 class FunctionScope { | |
| 16 final Set<String> parameterIdentifiers; | |
| 17 final Set<LocalPlaceholder> localPlaceholders; | |
| 18 FunctionScope() | |
| 19 : parameterIdentifiers = new Set<String>(), | |
| 20 localPlaceholders = new Set<LocalPlaceholder>(); | |
| 21 void registerParameter(Identifier node) { | |
| 22 parameterIdentifiers.add(node.source); | |
| 23 } | |
| 24 } | |
| 25 | |
| 26 class ConstructorPlaceholder { | |
| 27 final Identifier node; | |
| 28 final ConstructorElement element; | |
| 29 | |
| 30 ConstructorPlaceholder(this.node, this.element); | |
| 31 } | |
| 32 | |
| 33 class DeclarationTypePlaceholder { | |
| 34 final TypeAnnotation typeNode; | |
| 35 final bool requiresVar; | |
| 36 DeclarationTypePlaceholder(this.typeNode, this.requiresVar); | |
| 37 } | |
| 38 | |
| 39 class SendVisitor extends Visitor { | |
| 40 final TreeElements elements; | |
| 41 final PlaceholderCollector collector; | |
| 42 | |
| 43 SendVisitor(this.collector, this.elements); | |
| 44 | |
| 45 visitSend(Send node) { | |
| 46 Element element = elements[node]; | |
| 47 if (elements.isTypeLiteral(node)) { | |
| 48 DartType type = elements.getTypeLiteralType(node); | |
| 49 if (!type.isDynamic) { | |
| 50 if (type is TypeVariableType) { | |
| 51 collector.makeTypeVariablePlaceholder(node.selector, type); | |
| 52 } else { | |
| 53 collector.makeTypePlaceholder(node.selector, type); | |
| 54 } | |
| 55 } | |
| 56 } else if (node.isSuperCall) { | |
| 57 if (element != null && element.isConstructor) { | |
| 58 collector.tryMakeConstructorPlaceholder(node, element); | |
| 59 } else { | |
| 60 collector.tryMakeMemberPlaceholder(node.selector); | |
| 61 } | |
| 62 } else if (node.isOperator) { | |
| 63 return; | |
| 64 } else if (node.isPropertyAccess) { | |
| 65 if (!Elements.isUnresolved(element) && element.impliesType) { | |
| 66 collector.makeElementPlaceholder(node, element); | |
| 67 } else { | |
| 68 visitGetterSend(node); | |
| 69 } | |
| 70 } else if (element != null && Initializers.isConstructorRedirect(node)) { | |
| 71 visitStaticSend(node); | |
| 72 } else if (Elements.isClosureSend(node, element)) { | |
| 73 if (element != null) { | |
| 74 collector.tryMakeLocalPlaceholder(element, node.selector); | |
| 75 } | |
| 76 } else { | |
| 77 if (Elements.isUnresolved(element)) { | |
| 78 if (element == null) { | |
| 79 // Example: f() with 'f' unbound. | |
| 80 // This can only happen inside an instance method. | |
| 81 visitDynamicSend(node); | |
| 82 } else { | |
| 83 visitStaticSend(node); | |
| 84 } | |
| 85 } else if (element.isInstanceMember) { | |
| 86 // Example: f() with 'f' bound to instance method. | |
| 87 visitDynamicSend(node); | |
| 88 } else if (!element.isInstanceMember) { | |
| 89 // Example: A.f() or f() with 'f' bound to a static function. | |
| 90 // Also includes new A() or new A.named() which is treated like a | |
| 91 // static call to a factory. | |
| 92 visitStaticSend(node); | |
| 93 } | |
| 94 } | |
| 95 } | |
| 96 | |
| 97 visitDynamicSend(Send node) { | |
| 98 final element = elements[node]; | |
| 99 if (element == null || !element.isMalformed) { | |
| 100 collector.tryMakeMemberPlaceholder(node.selector); | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 visitGetterSend(Send node) { | |
| 105 final element = elements[node]; | |
| 106 // element == null means dynamic property access. | |
| 107 if (element == null) { | |
| 108 collector.tryMakeMemberPlaceholder(node.selector); | |
| 109 } else if (element.isMalformed) { | |
| 110 collector.makeUnresolvedPlaceholder(node); | |
| 111 return; | |
| 112 } else if (element.isPrefix) { | |
| 113 // Node is prefix part in case of source 'lib.somesetter = 5;' | |
| 114 collector.makeErasePrefixPlaceholder(node); | |
| 115 } else if (Elements.isStaticOrTopLevel(element)) { | |
| 116 // Unqualified or prefixed top level or static. | |
| 117 collector.makeElementPlaceholder(node.selector, element); | |
| 118 } else if (!element.isTopLevel) { | |
| 119 if (element.isInstanceMember) { | |
| 120 collector.tryMakeMemberPlaceholder(node.selector); | |
| 121 } else { | |
| 122 // May get FunctionExpression here in selector | |
| 123 // in case of A(int this.f()); | |
| 124 if (node.selector is Identifier) { | |
| 125 collector.tryMakeLocalPlaceholder(element, node.selector); | |
| 126 } else { | |
| 127 assert(node.selector is FunctionExpression); | |
| 128 } | |
| 129 } | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 visitStaticSend(Send node) { | |
| 134 Element element = elements[node]; | |
| 135 collector.mirrorRenamer | |
| 136 .registerStaticSend(collector.currentElement, element, node); | |
| 137 | |
| 138 if (Elements.isUnresolved(element) || element.isDeferredLoaderGetter) { | |
| 139 return; | |
| 140 } | |
| 141 if (element.isConstructor || element.isFactoryConstructor) { | |
| 142 // Rename named constructor in redirection position: | |
| 143 // class C { C.named(); C.redirecting() : this.named(); } | |
| 144 if (node.receiver is Identifier && | |
| 145 node.receiver.asIdentifier().isThis()) { | |
| 146 assert(node.selector is Identifier); | |
| 147 collector.tryMakeConstructorPlaceholder(node, element); | |
| 148 } | |
| 149 return; | |
| 150 } | |
| 151 collector.makeElementPlaceholder(node.selector, element); | |
| 152 // Another ugly case: <lib prefix>.<top level> is represented as | |
| 153 // receiver: lib prefix, selector: top level. | |
| 154 if (element.isTopLevel && node.receiver != null) { | |
| 155 assert(elements[node.receiver].isPrefix); | |
| 156 // Hack: putting null into map overrides receiver of original node. | |
| 157 collector.makeErasePrefixPlaceholder(node.receiver); | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 internalError(Spannable node, String reason) { | |
| 162 collector.internalError(reason, node: node); | |
| 163 } | |
| 164 | |
| 165 visitNode(Node node) { | |
| 166 internalError(node, "Unhandled node"); | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 class PlaceholderCollector extends Visitor { | |
| 171 final DiagnosticReporter reporter; | |
| 172 final MirrorRenamer mirrorRenamer; | |
| 173 final FunctionElement mainFunction; | |
| 174 final Set<String> fixedMemberNames; // member names which cannot be renamed. | |
| 175 final Map<Element, ElementAst> elementAsts; | |
| 176 final Set<Node> prefixNodesToErase = new Set<Node>(); | |
| 177 final Set<Node> unresolvedNodes = new Set<Node>(); | |
| 178 final Map<Element, Set<Node>> elementNodes = new Map<Element, Set<Node>>(); | |
| 179 final Map<FunctionElement, FunctionScope> functionScopes = | |
| 180 new Map<FunctionElement, FunctionScope>(); | |
| 181 final Map<LibraryElement, Set<Identifier>> privateNodes = | |
| 182 new Map<LibraryElement, Set<Identifier>>(); | |
| 183 final List<DeclarationTypePlaceholder> declarationTypePlaceholders = | |
| 184 new List<DeclarationTypePlaceholder>(); | |
| 185 final Map<String, Set<Identifier>> memberPlaceholders = | |
| 186 new Map<String, Set<Identifier>>(); | |
| 187 final List<ConstructorPlaceholder> constructorPlaceholders = | |
| 188 new List<ConstructorPlaceholder>(); | |
| 189 Map<String, LocalPlaceholder> currentLocalPlaceholders; | |
| 190 Element currentElement; | |
| 191 FunctionElement topmostEnclosingFunction; | |
| 192 TreeElements treeElements; | |
| 193 | |
| 194 get currentFunctionScope => functionScopes.putIfAbsent( | |
| 195 topmostEnclosingFunction, () => new FunctionScope()); | |
| 196 | |
| 197 PlaceholderCollector(this.reporter, this.mirrorRenamer, this.fixedMemberNames, | |
| 198 this.elementAsts, this.mainFunction); | |
| 199 | |
| 200 void collectFunctionDeclarationPlaceholders( | |
| 201 FunctionElement element, FunctionExpression node) { | |
| 202 if (element.isConstructor) { | |
| 203 ConstructorElement constructor = element; | |
| 204 tryMakeConstructorPlaceholder(node.name, element); | |
| 205 RedirectingFactoryBody bodyAsRedirectingFactoryBody = | |
| 206 node.body.asRedirectingFactoryBody(); | |
| 207 if (bodyAsRedirectingFactoryBody != null) { | |
| 208 // Factory redirection. | |
| 209 FunctionElement redirectTarget = constructor.immediateRedirectionTarget; | |
| 210 assert(redirectTarget != null && redirectTarget != element); | |
| 211 tryMakeConstructorPlaceholder( | |
| 212 bodyAsRedirectingFactoryBody.constructorReference, redirectTarget); | |
| 213 } | |
| 214 } else if (Elements.isStaticOrTopLevel(element)) { | |
| 215 // Note: this code should only rename private identifiers for class' | |
| 216 // fields/getters/setters/methods. Top-level identifiers are renamed | |
| 217 // just to escape conflicts and that should be enough as we shouldn't | |
| 218 // be able to resolve private identifiers for other libraries. | |
| 219 makeElementPlaceholder(node.name, element); | |
| 220 } else if (element.isClassMember) { | |
| 221 if (node.name is Identifier) { | |
| 222 tryMakeMemberPlaceholder(node.name); | |
| 223 } else { | |
| 224 assert(node.name.asSend().isOperator); | |
| 225 } | |
| 226 } | |
| 227 } | |
| 228 | |
| 229 void collectFieldDeclarationPlaceholders(Element element, Node node) { | |
| 230 Identifier name = node is Identifier ? node : node.asSend().selector; | |
| 231 if (Elements.isStaticOrTopLevel(element)) { | |
| 232 makeElementPlaceholder(name, element); | |
| 233 } else if (Elements.isInstanceField(element)) { | |
| 234 tryMakeMemberPlaceholder(name); | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 void collect(Element element) { | |
| 239 this.currentElement = element; | |
| 240 this.topmostEnclosingFunction = null; | |
| 241 final ElementAst elementAst = elementAsts[element]; | |
| 242 this.treeElements = elementAst.treeElements; | |
| 243 Node elementNode = elementAst.ast; | |
| 244 if (element is FunctionElement) { | |
| 245 collectFunctionDeclarationPlaceholders(element, elementNode); | |
| 246 } else if (element is VariableElement) { | |
| 247 VariableDefinitions definitions = elementNode; | |
| 248 Node definition = definitions.definitions.nodes.head; | |
| 249 collectFieldDeclarationPlaceholders(element, definition); | |
| 250 makeVarDeclarationTypePlaceholder(definitions); | |
| 251 } else { | |
| 252 assert(element is ClassElement || element is TypedefElement); | |
| 253 } | |
| 254 currentLocalPlaceholders = new Map<String, LocalPlaceholder>(); | |
| 255 if (!(element is ConstructorElement && element.isRedirectingFactory)) { | |
| 256 // Do not visit the body of redirecting factories. | |
| 257 reporter.withCurrentElement(element, () { | |
| 258 elementNode.accept(this); | |
| 259 }); | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 // TODO(karlklose): should we create placeholders for these? | |
| 264 bool isTypedefParameter(Element element) { | |
| 265 return element != null && | |
| 266 element.enclosingElement != null && | |
| 267 element.enclosingElement.isTypedef; | |
| 268 } | |
| 269 | |
| 270 void tryMakeLocalPlaceholder(Element element, Identifier node) { | |
| 271 bool isNamedOptionalParameter() { | |
| 272 FunctionTypedElement function = element.enclosingElement; | |
| 273 FunctionSignature signature = function.functionSignature; | |
| 274 if (!signature.optionalParametersAreNamed) return false; | |
| 275 for (Element parameter in signature.optionalParameters) { | |
| 276 if (identical(parameter, element)) return true; | |
| 277 } | |
| 278 return false; | |
| 279 } | |
| 280 if (element.isRegularParameter && | |
| 281 !isTypedefParameter(element) && | |
| 282 isNamedOptionalParameter()) { | |
| 283 currentFunctionScope.registerParameter(node); | |
| 284 } else if (Elements.isLocal(element) && !isTypedefParameter(element)) { | |
| 285 makeLocalPlaceholder(node); | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 void tryMakeMemberPlaceholder(Identifier node) { | |
| 290 assert(node != null); | |
| 291 if (node is Operator) return; | |
| 292 String identifier = node.source; | |
| 293 if (fixedMemberNames.contains(identifier)) return; | |
| 294 memberPlaceholders | |
| 295 .putIfAbsent(identifier, () => new Set<Identifier>()) | |
| 296 .add(node); | |
| 297 } | |
| 298 | |
| 299 void makeTypePlaceholder(Node node, DartType type) { | |
| 300 Send send = node.asSend(); | |
| 301 if (send != null) { | |
| 302 // Prefix. | |
| 303 assert(send.receiver is Identifier); | |
| 304 assert(send.selector is Identifier); | |
| 305 makeErasePrefixPlaceholder(send.receiver); | |
| 306 node = send.selector; | |
| 307 } | |
| 308 makeElementPlaceholder(node, type.element); | |
| 309 } | |
| 310 | |
| 311 void makeTypeVariablePlaceholder(Node node, TypeVariableType type) { | |
| 312 Send send = node.asSend(); | |
| 313 if (send != null) { | |
| 314 // Prefix. | |
| 315 assert(send.receiver is Identifier); | |
| 316 assert(send.selector is Identifier); | |
| 317 makeErasePrefixPlaceholder(send.receiver); | |
| 318 node = send.selector; | |
| 319 } | |
| 320 tryMakeMemberPlaceholder(node); | |
| 321 } | |
| 322 | |
| 323 void makeOmitDeclarationTypePlaceholder(TypeAnnotation type) { | |
| 324 if (type == null) return; | |
| 325 declarationTypePlaceholders | |
| 326 .add(new DeclarationTypePlaceholder(type, false)); | |
| 327 } | |
| 328 | |
| 329 void makeVarDeclarationTypePlaceholder(VariableDefinitions node) { | |
| 330 // TODO(smok): Maybe instead of calling this method and | |
| 331 // makeDeclaratioTypePlaceholder have type declaration placeholder | |
| 332 // collector logic in visitVariableDefinitions when resolver becomes better | |
| 333 // and/or catch syntax changes. | |
| 334 if (node.type == null) return; | |
| 335 bool requiresVar = !node.modifiers.isFinalOrConst; | |
| 336 declarationTypePlaceholders | |
| 337 .add(new DeclarationTypePlaceholder(node.type, requiresVar)); | |
| 338 } | |
| 339 | |
| 340 /// Marks [node] to be erased in the output. | |
| 341 /// This is done for library prefixes because they are not used in the output | |
| 342 /// because all imports are flattened and conflicts are renamed away. | |
| 343 void makeErasePrefixPlaceholder(Node node) { | |
| 344 assert(node is Identifier || node is Send); | |
| 345 prefixNodesToErase.add(node); | |
| 346 } | |
| 347 | |
| 348 void makeElementPlaceholder(Node node, Element element) { | |
| 349 assert(node != null); | |
| 350 assert(element != null); | |
| 351 LibraryElement library = element.library; | |
| 352 if (identical(element, mainFunction)) return; | |
| 353 if (library.isDartCore) return; | |
| 354 | |
| 355 if (library.isPlatformLibrary && !element.isTopLevel) { | |
| 356 return; | |
| 357 } | |
| 358 | |
| 359 ClassElement cls = element.enclosingClass; | |
| 360 if (cls != null && cls.isEnumClass) { | |
| 361 // Enums and enum values cannot be changed, since the semantics of | |
| 362 // `toString` is defined by the names of the declarations. | |
| 363 return; | |
| 364 } | |
| 365 | |
| 366 if (element.isAccessor) { | |
| 367 element = (element as AccessorElement).abstractField; | |
| 368 } | |
| 369 elementNodes.putIfAbsent(element, () => new Set<Node>()).add(node); | |
| 370 } | |
| 371 | |
| 372 /// Marks [node] to be renamed per-library if it names an instance member | |
| 373 /// and has a private name. | |
| 374 void tryMakePrivateIdentifier(Node node, Element element) { | |
| 375 if (node is Identifier && | |
| 376 !Elements.isStaticOrTopLevel(element) && | |
| 377 !Elements.isLocal(element) && | |
| 378 Name.isPrivateName(node.source)) { | |
| 379 privateNodes | |
| 380 .putIfAbsent(currentElement.library, () => new Set<Identifier>()) | |
| 381 .add(node); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 void makeUnresolvedPlaceholder(Node node) { | |
| 386 unresolvedNodes.add(node); | |
| 387 } | |
| 388 | |
| 389 void makeLocalPlaceholder(Identifier identifier) { | |
| 390 LocalPlaceholder getLocalPlaceholder() { | |
| 391 String name = identifier.source; | |
| 392 return currentLocalPlaceholders.putIfAbsent(name, () { | |
| 393 LocalPlaceholder localPlaceholder = new LocalPlaceholder(name); | |
| 394 currentFunctionScope.localPlaceholders.add(localPlaceholder); | |
| 395 return localPlaceholder; | |
| 396 }); | |
| 397 } | |
| 398 getLocalPlaceholder().nodes.add(identifier); | |
| 399 } | |
| 400 | |
| 401 /// Finds the first constructor on the chain of definingConstructor from | |
| 402 /// [element] that is not in a synthetic class. | |
| 403 Element findDefiningConstructor(ConstructorElement element) { | |
| 404 while (element.definingConstructor != null) { | |
| 405 element = element.definingConstructor; | |
| 406 } | |
| 407 return element; | |
| 408 } | |
| 409 | |
| 410 void tryMakeConstructorPlaceholder(Node node, ConstructorElement element) { | |
| 411 if (Elements.isUnresolved(element)) { | |
| 412 makeUnresolvedPlaceholder(node); | |
| 413 return; | |
| 414 } | |
| 415 // A library prefix. | |
| 416 Node prefix; | |
| 417 // The name of the class with the constructor. | |
| 418 Node className; | |
| 419 // Will be null for unnamed constructors. | |
| 420 Identifier constructorName; | |
| 421 // First deconstruct the constructor, there are 4 possibilities: | |
| 422 // ClassName() | |
| 423 // prefix.ClassName() | |
| 424 // ClassName.constructorName() | |
| 425 // prefix.ClassName.constructorName() | |
| 426 if (node is Send) { | |
| 427 if (node.receiver is Send) { | |
| 428 Send receiver = node.receiver; | |
| 429 // prefix.ClassName.constructorName() | |
| 430 assert(treeElements[receiver.receiver] != null && | |
| 431 treeElements[receiver.receiver].isPrefix); | |
| 432 prefix = receiver.receiver; | |
| 433 className = receiver.selector; | |
| 434 constructorName = node.selector; | |
| 435 } else { | |
| 436 Element receiverElement = treeElements[node.receiver]; | |
| 437 if (receiverElement != null && receiverElement.isPrefix) { | |
| 438 // prefix.ClassName() | |
| 439 prefix = node.receiver; | |
| 440 className = node.selector; | |
| 441 } else { | |
| 442 // ClassName.constructorName() | |
| 443 className = node.receiver; | |
| 444 constructorName = node.selector; | |
| 445 } | |
| 446 } | |
| 447 } else { | |
| 448 // ClassName() | |
| 449 className = node; | |
| 450 } | |
| 451 | |
| 452 if (prefix != null) { | |
| 453 makeErasePrefixPlaceholder(prefix); | |
| 454 } | |
| 455 | |
| 456 if (className is TypeAnnotation) { | |
| 457 visitTypeAnnotation(className); | |
| 458 } else if (Elements.isUnresolved(element)) { | |
| 459 // We handle unresolved nodes elsewhere. | |
| 460 } else if (className.isThis() || className.isSuper()) { | |
| 461 // Do not rename super and this. | |
| 462 } else if (className is Identifier) { | |
| 463 makeElementPlaceholder(className, element.contextClass); | |
| 464 } else { | |
| 465 throw "Bad type of constructor name $className"; | |
| 466 } | |
| 467 | |
| 468 if (constructorName != null) { | |
| 469 Element definingConstructor = findDefiningConstructor(element); | |
| 470 constructorPlaceholders.add( | |
| 471 new ConstructorPlaceholder(constructorName, definingConstructor)); | |
| 472 tryMakePrivateIdentifier(constructorName, element); | |
| 473 } | |
| 474 } | |
| 475 | |
| 476 void internalError(String reason, {Node node}) { | |
| 477 reporter.internalError(node, reason); | |
| 478 } | |
| 479 | |
| 480 visit(Node node) => (node == null) ? null : node.accept(this); | |
| 481 | |
| 482 visitNode(Node node) { | |
| 483 node.visitChildren(this); | |
| 484 } // We must go deeper. | |
| 485 | |
| 486 visitNewExpression(NewExpression node) { | |
| 487 Send send = node.send; | |
| 488 DartType type = treeElements.getType(node); | |
| 489 assert(type != null); | |
| 490 Element constructor = treeElements[send]; | |
| 491 assert(constructor != null); | |
| 492 assert(send.receiver == null); | |
| 493 if (!Elements.isMalformed(constructor)) { | |
| 494 tryMakeConstructorPlaceholder(node.send.selector, constructor); | |
| 495 // TODO(smok): Should this be in visitNamedArgument? | |
| 496 // Field names can be exposed as names of optional arguments, e.g. | |
| 497 // class C { | |
| 498 // final field; | |
| 499 // C([this.field]); | |
| 500 // } | |
| 501 // Do not forget to rename them as well. | |
| 502 FunctionElement constructorFunction = constructor; | |
| 503 List<Element> optionalParameters = | |
| 504 constructorFunction.functionSignature.optionalParameters; | |
| 505 for (final argument in send.argumentsNode) { | |
| 506 NamedArgument named = argument.asNamedArgument(); | |
| 507 if (named == null) continue; | |
| 508 Identifier name = named.name; | |
| 509 String nameAsString = name.source; | |
| 510 for (final parameter in optionalParameters) { | |
| 511 if (parameter.isInitializingFormal) { | |
| 512 if (parameter.name == nameAsString) { | |
| 513 tryMakeMemberPlaceholder(name); | |
| 514 break; | |
| 515 } | |
| 516 } | |
| 517 } | |
| 518 } | |
| 519 } else { | |
| 520 makeUnresolvedPlaceholder(node.send.selector); | |
| 521 } | |
| 522 visit(node.send.argumentsNode); | |
| 523 } | |
| 524 | |
| 525 visitSend(Send send) { | |
| 526 Element element = treeElements[send]; | |
| 527 tryMakePrivateIdentifier(send.selector, element); | |
| 528 new SendVisitor(this, treeElements).visitSend(send); | |
| 529 send.visitChildren(this); | |
| 530 } | |
| 531 | |
| 532 visitSendSet(SendSet send) { | |
| 533 Element element = treeElements[send]; | |
| 534 if (Elements.isMalformed(element)) { | |
| 535 // Complicated case: constructs like receiver.selector++ can resolve | |
| 536 // to ErroneousElement. Fortunately, receiver.selector still | |
| 537 // can be resoved via treeElements[send.selector], that's all | |
| 538 // that is needed to rename the construct properly. | |
| 539 element = treeElements[send.selector]; | |
| 540 } | |
| 541 tryMakePrivateIdentifier(send.selector, element); | |
| 542 if (element == null) { | |
| 543 if (send.receiver != null) tryMakeMemberPlaceholder(send.selector); | |
| 544 } else if (!element.isMalformed) { | |
| 545 if (Elements.isStaticOrTopLevel(element)) { | |
| 546 // TODO(smok): Worth investigating why sometimes we get getter/setter | |
| 547 // here and sometimes abstract field. | |
| 548 assert(element.isClass || | |
| 549 element is VariableElement || | |
| 550 element.isAccessor || | |
| 551 element.isAbstractField || | |
| 552 element.isFunction || | |
| 553 element.isTypedef || | |
| 554 element is TypeVariableElement); | |
| 555 makeElementPlaceholder(send.selector, element); | |
| 556 } else { | |
| 557 Identifier identifier = send.selector.asIdentifier(); | |
| 558 if (identifier == null) { | |
| 559 // Handle optional function expression parameters with default values. | |
| 560 identifier = send.selector.asFunctionExpression().name; | |
| 561 } | |
| 562 if (Elements.isInstanceField(element)) { | |
| 563 tryMakeMemberPlaceholder(identifier); | |
| 564 } else { | |
| 565 tryMakeLocalPlaceholder(element, identifier); | |
| 566 } | |
| 567 } | |
| 568 } | |
| 569 send.visitChildren(this); | |
| 570 } | |
| 571 | |
| 572 visitTypeAnnotation(TypeAnnotation node) { | |
| 573 final type = treeElements.getType(node); | |
| 574 assert(invariant(node, type != null, | |
| 575 message: "Missing type for type annotation: $treeElements")); | |
| 576 if (!type.isVoid) { | |
| 577 if (!type.treatAsDynamic) { | |
| 578 if (type is TypeVariableType) { | |
| 579 makeTypeVariablePlaceholder(node.typeName, type); | |
| 580 } else { | |
| 581 makeTypePlaceholder(node.typeName, type); | |
| 582 } | |
| 583 } else if (!type.isDynamic) { | |
| 584 makeUnresolvedPlaceholder(node.typeName); | |
| 585 } | |
| 586 } | |
| 587 // Visit only type arguments, otherwise in case of lib.Class type | |
| 588 // annotation typeName is Send and we go to visitGetterSend, as a result | |
| 589 // "Class" is added to member placeholders. | |
| 590 visit(node.typeArguments); | |
| 591 } | |
| 592 | |
| 593 visitVariableDefinitions(VariableDefinitions node) { | |
| 594 // Collect only local placeholders. | |
| 595 for (Node definition in node.definitions.nodes) { | |
| 596 Element definitionElement = treeElements[definition]; | |
| 597 // definitionElement may be null if we're inside variable definitions | |
| 598 // of a function that is a parameter of another function. | |
| 599 // TODO(smok): Fix this when resolver correctly deals with | |
| 600 // such cases. | |
| 601 if (definitionElement == null) continue; | |
| 602 | |
| 603 Send send = definition.asSend(); | |
| 604 Identifier identifier = definition is Identifier | |
| 605 ? definition | |
| 606 : definition is Send | |
| 607 ? (send.selector is Identifier ? send.selector : null) | |
| 608 : null; | |
| 609 | |
| 610 tryMakePrivateIdentifier(identifier, definitionElement); | |
| 611 | |
| 612 if (send != null) { | |
| 613 // May get FunctionExpression here in definition.selector | |
| 614 // in case of A(int this.f()); | |
| 615 if (send.selector is Identifier) { | |
| 616 if (definitionElement.isInitializingFormal) { | |
| 617 tryMakeMemberPlaceholder(send.selector); | |
| 618 } else { | |
| 619 tryMakeLocalPlaceholder(definitionElement, send.selector); | |
| 620 } | |
| 621 } else { | |
| 622 assert(send.selector is FunctionExpression); | |
| 623 if (definitionElement.isInitializingFormal) { | |
| 624 tryMakeMemberPlaceholder(send.selector.asFunctionExpression().name); | |
| 625 } | |
| 626 } | |
| 627 } else if (definition is Identifier) { | |
| 628 tryMakeLocalPlaceholder(definitionElement, definition); | |
| 629 } else if (definition is FunctionExpression) { | |
| 630 // Skip, it will be processed in visitFunctionExpression. | |
| 631 } else { | |
| 632 internalError('Unexpected definition structure $definition'); | |
| 633 } | |
| 634 } | |
| 635 node.visitChildren(this); | |
| 636 } | |
| 637 | |
| 638 visitFunctionExpression(FunctionExpression node) { | |
| 639 bool isKeyword(Identifier id) => | |
| 640 id != null && Keyword.keywords[id.source] != null; | |
| 641 | |
| 642 Element element = treeElements[node]; | |
| 643 // May get null; | |
| 644 if (element != null) { | |
| 645 tryMakePrivateIdentifier(node.name, element); | |
| 646 | |
| 647 // Rename only local functions. | |
| 648 if (topmostEnclosingFunction == null && | |
| 649 element is! LocalParameterElement && | |
| 650 element is! InitializingFormalElement) { | |
| 651 topmostEnclosingFunction = element; | |
| 652 } | |
| 653 if (!identical(element, currentElement)) { | |
| 654 if (node.name != null) { | |
| 655 assert(node.name is Identifier); | |
| 656 tryMakeLocalPlaceholder(element, node.name); | |
| 657 } | |
| 658 } | |
| 659 } | |
| 660 | |
| 661 node.visitChildren(this); | |
| 662 | |
| 663 // Make sure we don't omit return type of methods which names are | |
| 664 // identifiers, because the following works fine: | |
| 665 // int interface() => 1; | |
| 666 // But omitting 'int' makes VM unhappy. | |
| 667 // TODO(smok): Remove it when http://dartbug.com/5278 is fixed. | |
| 668 if (node.name == null || !isKeyword(node.name.asIdentifier())) { | |
| 669 makeOmitDeclarationTypePlaceholder(node.returnType); | |
| 670 } | |
| 671 collectFunctionParameters(node.parameters); | |
| 672 } | |
| 673 | |
| 674 void collectFunctionParameters(NodeList parameters) { | |
| 675 if (parameters == null) return; | |
| 676 for (Node parameter in parameters.nodes) { | |
| 677 if (parameter is NodeList) { | |
| 678 // Optional parameter list. | |
| 679 collectFunctionParameters(parameter); | |
| 680 } else { | |
| 681 assert(parameter is VariableDefinitions); | |
| 682 makeOmitDeclarationTypePlaceholder( | |
| 683 parameter.asVariableDefinitions().type); | |
| 684 } | |
| 685 } | |
| 686 } | |
| 687 | |
| 688 visitClassNode(ClassNode node) { | |
| 689 ClassElement classElement = currentElement; | |
| 690 makeElementPlaceholder(node.name, classElement); | |
| 691 node.visitChildren(this); | |
| 692 } | |
| 693 | |
| 694 visitNamedMixinApplication(NamedMixinApplication node) { | |
| 695 ClassElement classElement = currentElement; | |
| 696 makeElementPlaceholder(node.name, classElement); | |
| 697 node.visitChildren(this); | |
| 698 } | |
| 699 | |
| 700 visitTypeVariable(TypeVariable node) { | |
| 701 DartType type = treeElements.getType(node); | |
| 702 assert(invariant(node, type != null, | |
| 703 message: "Missing type for type variable: $treeElements")); | |
| 704 makeTypeVariablePlaceholder(node.name, type); | |
| 705 node.visitChildren(this); | |
| 706 } | |
| 707 | |
| 708 visitTypedef(Typedef node) { | |
| 709 assert(currentElement is TypedefElement); | |
| 710 makeElementPlaceholder(node.name, currentElement); | |
| 711 node.visitChildren(this); | |
| 712 makeOmitDeclarationTypePlaceholder(node.returnType); | |
| 713 collectFunctionParameters(node.formals); | |
| 714 } | |
| 715 | |
| 716 visitBlock(Block node) { | |
| 717 for (Node statement in node.statements.nodes) { | |
| 718 if (statement is VariableDefinitions) { | |
| 719 makeVarDeclarationTypePlaceholder(statement); | |
| 720 } | |
| 721 } | |
| 722 node.visitChildren(this); | |
| 723 } | |
| 724 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2213673002:
Delete dart_backend from compiler. (Closed)
Base URL: git@github.com:dart-lang/sdk.git@master