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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 library universe; | |
| 6 | |
| 7 import '../elements/elements.dart'; | |
| 8 import '../dart2jslib.dart'; | |
| 9 import '../dart_types.dart'; | |
| 10 import '../types/types.dart'; | |
| 11 import '../tree/tree.dart'; | |
| 12 import '../util/util.dart'; | |
| 13 | |
| 14 part 'function_set.dart'; | |
| 15 part 'side_effects.dart'; | |
| 16 | |
| 17 class Universe { | |
| 18 /// The set of all directly instantiated classes, that is, classes with a | |
| 19 /// generative constructor that has been called directly and not only through | |
| 20 /// a super-call. | |
| 21 /// | |
| 22 /// Invariant: Elements are declaration elements. | |
| 23 // TODO(johnniwinther): [_directlyInstantiatedClasses] and | |
| 24 // [_instantiatedTypes] sets should be merged. | |
| 25 final Set<ClassElement> _directlyInstantiatedClasses = | |
| 26 new Set<ClassElement>(); | |
| 27 | |
| 28 /// The set of all directly instantiated types, that is, the types of the | |
| 29 /// directly instantiated classes. | |
| 30 /// | |
| 31 /// See [_directlyInstantiatedClasses]. | |
| 32 final Set<DartType> _instantiatedTypes = new Set<DartType>(); | |
| 33 | |
| 34 /// The set of all instantiated classes, either directly, as superclasses or | |
| 35 /// as supertypes. | |
| 36 /// | |
| 37 /// Invariant: Elements are declaration elements. | |
| 38 final Set<ClassElement> _allInstantiatedClasses = new Set<ClassElement>(); | |
| 39 | |
| 40 /** | |
| 41 * Documentation wanted -- johnniwinther | |
| 42 * | |
| 43 * Invariant: Elements are declaration elements. | |
| 44 */ | |
| 45 final Set<FunctionElement> staticFunctionsNeedingGetter = | |
| 46 new Set<FunctionElement>(); | |
| 47 final Set<FunctionElement> methodsNeedingSuperGetter = | |
| 48 new Set<FunctionElement>(); | |
| 49 final Map<String, Set<Selector>> invokedNames = | |
| 50 new Map<String, Set<Selector>>(); | |
| 51 final Map<String, Set<Selector>> invokedGetters = | |
| 52 new Map<String, Set<Selector>>(); | |
| 53 final Map<String, Set<Selector>> invokedSetters = | |
| 54 new Map<String, Set<Selector>>(); | |
| 55 | |
| 56 /** | |
| 57 * Fields accessed. Currently only the codegen knows this | |
| 58 * information. The resolver is too conservative when seeing a | |
| 59 * getter and only registers an invoked getter. | |
| 60 */ | |
| 61 final Set<Element> fieldGetters = new Set<Element>(); | |
| 62 | |
| 63 /** | |
| 64 * Fields set. See comment in [fieldGetters]. | |
| 65 */ | |
| 66 final Set<Element> fieldSetters = new Set<Element>(); | |
| 67 final Set<DartType> isChecks = new Set<DartType>(); | |
| 68 | |
| 69 /** | |
| 70 * Set of (live) [:call:] methods whose signatures reference type variables. | |
| 71 * | |
| 72 * A live [:call:] method is one whose enclosing class has been instantiated. | |
| 73 */ | |
| 74 final Set<Element> callMethodsWithFreeTypeVariables = new Set<Element>(); | |
| 75 | |
| 76 /** | |
| 77 * Set of (live) local functions (closures) whose signatures reference type | |
| 78 * variables. | |
| 79 * | |
| 80 * A live function is one whose enclosing member function has been enqueued. | |
| 81 */ | |
| 82 final Set<Element> closuresWithFreeTypeVariables = new Set<Element>(); | |
| 83 | |
| 84 /** | |
| 85 * Set of all closures in the program. Used by the mirror tracking system | |
| 86 * to find all live closure instances. | |
| 87 */ | |
| 88 final Set<LocalFunctionElement> allClosures = new Set<LocalFunctionElement>(); | |
| 89 | |
| 90 /** | |
| 91 * Set of methods in instantiated classes that are potentially | |
| 92 * closurized. | |
| 93 */ | |
| 94 final Set<Element> closurizedMembers = new Set<Element>(); | |
| 95 | |
| 96 bool usingFactoryWithTypeArguments = false; | |
| 97 | |
| 98 /// All directly instantiated classes, that is, classes with a generative | |
| 99 /// constructor that has been called directly and not only through a | |
| 100 /// super-call. | |
| 101 // TODO(johnniwinther): Improve semantic precision. | |
| 102 Iterable<ClassElement> get directlyInstantiatedClasses { | |
| 103 return _directlyInstantiatedClasses; | |
| 104 } | |
| 105 | |
| 106 /// All instantiated classes, either directly, as superclasses or as | |
| 107 /// supertypes. | |
| 108 // TODO(johnniwinther): Improve semantic precision. | |
| 109 Iterable<ClassElement> get allInstantiatedClasses { | |
| 110 return _allInstantiatedClasses; | |
| 111 } | |
| 112 | |
| 113 /// All directly instantiated types, that is, the types of the directly | |
| 114 /// instantiated classes. | |
| 115 /// | |
| 116 /// See [directlyInstantiatedClasses]. | |
| 117 // TODO(johnniwinther): Improve semantic precision. | |
| 118 Iterable<DartType> get instantiatedTypes => _instantiatedTypes; | |
| 119 | |
| 120 /// Returns `true` if [cls] is considered to be instantiated, either directly, | |
| 121 /// through subclasses or throught subtypes. | |
| 122 // TODO(johnniwinther): Improve semantic precision. | |
| 123 bool isInstantiated(ClassElement cls) { | |
| 124 return _allInstantiatedClasses.contains(cls); | |
| 125 } | |
| 126 | |
| 127 /// Register [type] as (directly) instantiated. | |
| 128 /// | |
| 129 /// If [byMirrors] is `true`, the instantiation is through mirrors. | |
| 130 // TODO(johnniwinther): Fully enforce the separation between exact, through | |
| 131 // subclass and through subtype instantiated types/classes. | |
| 132 // TODO(johnniwinther): Support unknown type arguments for generic types. | |
| 133 void registerTypeInstantiation(InterfaceType type, | |
| 134 {bool byMirrors: false}) { | |
| 135 _instantiatedTypes.add(type); | |
| 136 ClassElement cls = type.element; | |
| 137 if (!cls.isAbstract | |
| 138 // We can't use the closed-world assumption with native abstract | |
| 139 // classes; a native abstract class may have non-abstract subclasses | |
| 140 // not declared to the program. Instances of these classes are | |
| 141 // indistinguishable from the abstract class. | |
| 142 || cls.isNative | |
| 143 // Likewise, if this registration comes from the mirror system, | |
| 144 // all bets are off. | |
| 145 // TODO(herhut): Track classes required by mirrors seperately. | |
| 146 || byMirrors) { | |
| 147 _directlyInstantiatedClasses.add(cls); | |
| 148 } | |
| 149 | |
| 150 // TODO(johnniwinther): Replace this by separate more specific mappings. | |
| 151 if (!_allInstantiatedClasses.add(cls)) return; | |
| 152 cls.allSupertypes.forEach((InterfaceType supertype) { | |
| 153 _allInstantiatedClasses.add(supertype.element); | |
| 154 }); | |
| 155 } | |
| 156 | |
| 157 bool hasMatchingSelector(Set<Selector> selectors, | |
| 158 Element member, | |
| 159 World world) { | |
| 160 if (selectors == null) return false; | |
| 161 for (Selector selector in selectors) { | |
| 162 if (selector.appliesUnnamed(member, world)) return true; | |
| 163 } | |
| 164 return false; | |
| 165 } | |
| 166 | |
| 167 bool hasInvocation(Element member, World world) { | |
| 168 return hasMatchingSelector(invokedNames[member.name], member, world); | |
| 169 } | |
| 170 | |
| 171 bool hasInvokedGetter(Element member, World world) { | |
| 172 return hasMatchingSelector(invokedGetters[member.name], member, world); | |
| 173 } | |
| 174 | |
| 175 bool hasInvokedSetter(Element member, World world) { | |
| 176 return hasMatchingSelector(invokedSetters[member.name], member, world); | |
| 177 } | |
| 178 | |
| 179 DartType registerIsCheck(DartType type, Compiler compiler) { | |
| 180 type = type.unalias(compiler); | |
| 181 // Even in checked mode, type annotations for return type and argument | |
| 182 // types do not imply type checks, so there should never be a check | |
| 183 // against the type variable of a typedef. | |
| 184 isChecks.add(type); | |
| 185 return type; | |
| 186 } | |
| 187 | |
| 188 void forgetElement(Element element, Compiler compiler) { | |
| 189 allClosures.remove(element); | |
| 190 slowDirectlyNestedClosures(element).forEach(compiler.forgetElement); | |
| 191 closurizedMembers.remove(element); | |
| 192 fieldSetters.remove(element); | |
| 193 fieldGetters.remove(element); | |
| 194 _directlyInstantiatedClasses.remove(element); | |
| 195 _allInstantiatedClasses.remove(element); | |
| 196 if (element is ClassElement) { | |
| 197 assert(invariant( | |
| 198 element, element.thisType.isRaw, | |
| 199 message: 'Generic classes not supported (${element.thisType}).')); | |
| 200 _instantiatedTypes | |
| 201 ..remove(element.rawType) | |
| 202 ..remove(element.thisType); | |
| 203 } | |
| 204 } | |
| 205 | |
| 206 // TODO(ahe): Replace this method with something that is O(1), for example, | |
| 207 // by using a map. | |
| 208 List<LocalFunctionElement> slowDirectlyNestedClosures(Element element) { | |
| 209 // Return new list to guard against concurrent modifications. | |
| 210 return new List<LocalFunctionElement>.from( | |
| 211 allClosures.where((LocalFunctionElement closure) { | |
| 212 return closure.executableContext == element; | |
| 213 })); | |
| 214 } | |
| 215 } | |
| 216 | |
| 217 class SelectorKind { | |
| 218 final String name; | |
| 219 final int hashCode; | |
| 220 const SelectorKind(this.name, this.hashCode); | |
| 221 | |
| 222 static const SelectorKind GETTER = const SelectorKind('getter', 0); | |
| 223 static const SelectorKind SETTER = const SelectorKind('setter', 1); | |
| 224 static const SelectorKind CALL = const SelectorKind('call', 2); | |
| 225 static const SelectorKind OPERATOR = const SelectorKind('operator', 3); | |
| 226 static const SelectorKind INDEX = const SelectorKind('index', 4); | |
| 227 | |
| 228 String toString() => name; | |
| 229 } | |
| 230 | |
| 231 class Selector { | |
| 232 final SelectorKind kind; | |
| 233 final String name; | |
| 234 final LibraryElement library; // Library is null for non-private selectors. | |
| 235 | |
| 236 // The numbers of arguments of the selector. Includes named arguments. | |
| 237 final int argumentCount; | |
| 238 final List<String> namedArguments; | |
| 239 final List<String> _orderedNamedArguments; | |
| 240 final int hashCode; | |
| 241 | |
| 242 static const String INDEX_NAME ="[]"; | |
| 243 static const String INDEX_SET_NAME = "[]="; | |
| 244 static const String CALL_NAME = Compiler.CALL_OPERATOR_NAME; | |
| 245 | |
| 246 Selector.internal(this.kind, | |
| 247 this.name, | |
| 248 this.library, | |
| 249 this.argumentCount, | |
| 250 this.namedArguments, | |
| 251 this._orderedNamedArguments, | |
| 252 this.hashCode) { | |
| 253 assert(kind == SelectorKind.INDEX | |
| 254 || (name != INDEX_NAME && name != INDEX_SET_NAME)); | |
| 255 assert(kind == SelectorKind.OPERATOR | |
| 256 || kind == SelectorKind.INDEX | |
| 257 || !Elements.isOperatorName(name)); | |
| 258 assert(kind == SelectorKind.CALL | |
| 259 || kind == SelectorKind.GETTER | |
| 260 || kind == SelectorKind.SETTER | |
| 261 || Elements.isOperatorName(name)); | |
| 262 assert(!isPrivateName(name) || library != null); | |
| 263 } | |
| 264 | |
| 265 static Map<int, List<Selector>> canonicalizedValues = | |
| 266 new Map<int, List<Selector>>(); | |
| 267 | |
| 268 factory Selector(SelectorKind kind, | |
| 269 String name, | |
| 270 LibraryElement library, | |
| 271 int argumentCount, | |
| 272 [List<String> namedArguments]) { | |
| 273 if (!isPrivateName(name)) library = null; | |
| 274 if (namedArguments == null) namedArguments = const <String>[]; | |
| 275 int hashCode = computeHashCode( | |
| 276 kind, name, library, argumentCount, namedArguments); | |
| 277 List<Selector> list = canonicalizedValues.putIfAbsent(hashCode, | |
| 278 () => <Selector>[]); | |
| 279 for (int i = 0; i < list.length; i++) { | |
| 280 Selector existing = list[i]; | |
| 281 if (existing.match(kind, name, library, argumentCount, namedArguments)) { | |
| 282 assert(existing.hashCode == hashCode); | |
| 283 assert(existing.mask == null); | |
| 284 return existing; | |
| 285 } | |
| 286 } | |
| 287 List<String> orderedNamedArguments = namedArguments.isEmpty | |
| 288 ? const <String>[] | |
| 289 : <String>[]; | |
| 290 Selector result = new Selector.internal( | |
| 291 kind, name, library, argumentCount, | |
| 292 namedArguments, orderedNamedArguments, | |
| 293 hashCode); | |
| 294 list.add(result); | |
| 295 return result; | |
| 296 } | |
| 297 | |
| 298 factory Selector.fromElement(Element element) { | |
| 299 String name = element.name; | |
| 300 if (element.isFunction) { | |
| 301 if (name == '[]') { | |
| 302 return new Selector.index(); | |
| 303 } else if (name == '[]=') { | |
| 304 return new Selector.indexSet(); | |
| 305 } | |
| 306 FunctionSignature signature = | |
| 307 element.asFunctionElement().functionSignature; | |
| 308 int arity = signature.parameterCount; | |
| 309 List<String> namedArguments = null; | |
| 310 if (signature.optionalParametersAreNamed) { | |
| 311 namedArguments = | |
| 312 signature.orderedOptionalParameters.map((e) => e.name).toList(); | |
| 313 } | |
| 314 if (element.isOperator) { | |
| 315 // Operators cannot have named arguments, however, that doesn't prevent | |
| 316 // a user from declaring such an operator. | |
| 317 return new Selector( | |
| 318 SelectorKind.OPERATOR, name, null, arity, namedArguments); | |
| 319 } else { | |
| 320 return new Selector.call( | |
| 321 name, element.library, arity, namedArguments); | |
| 322 } | |
| 323 } else if (element.isSetter) { | |
| 324 return new Selector.setter(name, element.library); | |
| 325 } else if (element.isGetter) { | |
| 326 return new Selector.getter(name, element.library); | |
| 327 } else if (element.isField) { | |
| 328 return new Selector.getter(name, element.library); | |
| 329 } else { | |
| 330 throw new SpannableAssertionFailure( | |
| 331 element, "Can't get selector from $element"); | |
| 332 } | |
| 333 } | |
| 334 | |
| 335 factory Selector.getter(String name, LibraryElement library) | |
| 336 => new Selector(SelectorKind.GETTER, name, library, 0); | |
| 337 | |
| 338 factory Selector.getterFrom(Selector selector) | |
| 339 => new Selector(SelectorKind.GETTER, selector.name, selector.library, 0); | |
| 340 | |
| 341 factory Selector.setter(String name, LibraryElement library) | |
| 342 => new Selector(SelectorKind.SETTER, name, library, 1); | |
| 343 | |
| 344 factory Selector.unaryOperator(String name) | |
| 345 => new Selector(SelectorKind.OPERATOR, | |
| 346 Elements.constructOperatorName(name, true), | |
| 347 null, 0); | |
| 348 | |
| 349 factory Selector.binaryOperator(String name) | |
| 350 => new Selector(SelectorKind.OPERATOR, | |
| 351 Elements.constructOperatorName(name, false), | |
| 352 null, 1); | |
| 353 | |
| 354 factory Selector.index() | |
| 355 => new Selector(SelectorKind.INDEX, | |
| 356 Elements.constructOperatorName(INDEX_NAME, false), | |
| 357 null, 1); | |
| 358 | |
| 359 factory Selector.indexSet() | |
| 360 => new Selector(SelectorKind.INDEX, | |
| 361 Elements.constructOperatorName(INDEX_SET_NAME, false), | |
| 362 null, 2); | |
| 363 | |
| 364 factory Selector.call(String name, | |
| 365 LibraryElement library, | |
| 366 int arity, | |
| 367 [List<String> namedArguments]) | |
| 368 => new Selector(SelectorKind.CALL, name, library, arity, namedArguments); | |
| 369 | |
| 370 factory Selector.callClosure(int arity, [List<String> namedArguments]) | |
| 371 => new Selector(SelectorKind.CALL, CALL_NAME, null, | |
| 372 arity, namedArguments); | |
| 373 | |
| 374 factory Selector.callClosureFrom(Selector selector) | |
| 375 => new Selector(SelectorKind.CALL, CALL_NAME, null, | |
| 376 selector.argumentCount, selector.namedArguments); | |
| 377 | |
| 378 factory Selector.callConstructor(String name, LibraryElement library, | |
| 379 [int arity = 0, | |
| 380 List<String> namedArguments]) | |
| 381 => new Selector(SelectorKind.CALL, name, library, | |
| 382 arity, namedArguments); | |
| 383 | |
| 384 factory Selector.callDefaultConstructor(LibraryElement library) | |
| 385 => new Selector(SelectorKind.CALL, "", library, 0); | |
| 386 | |
| 387 bool get isGetter => identical(kind, SelectorKind.GETTER); | |
| 388 bool get isSetter => identical(kind, SelectorKind.SETTER); | |
| 389 bool get isCall => identical(kind, SelectorKind.CALL); | |
| 390 bool get isClosureCall { | |
| 391 String callName = Compiler.CALL_OPERATOR_NAME; | |
| 392 return isCall && name == callName; | |
| 393 } | |
| 394 | |
| 395 bool get isIndex => identical(kind, SelectorKind.INDEX) && argumentCount == 1; | |
| 396 bool get isIndexSet => identical(kind, SelectorKind.INDEX) && argumentCount ==
2; | |
| 397 | |
| 398 bool get isOperator => identical(kind, SelectorKind.OPERATOR); | |
| 399 bool get isUnaryOperator => isOperator && argumentCount == 0; | |
| 400 | |
| 401 /** Check whether this is a call to 'assert'. */ | |
| 402 bool get isAssert => isCall && identical(name, "assert"); | |
| 403 | |
| 404 int get namedArgumentCount => namedArguments.length; | |
| 405 int get positionalArgumentCount => argumentCount - namedArgumentCount; | |
| 406 | |
| 407 bool get hasExactMask => false; | |
| 408 TypeMask get mask => null; | |
| 409 Selector get asUntyped => this; | |
| 410 | |
| 411 /** | |
| 412 * The member name for invocation mirrors created from this selector. | |
| 413 */ | |
| 414 String get invocationMirrorMemberName => | |
| 415 isSetter ? '$name=' : name; | |
| 416 | |
| 417 int get invocationMirrorKind { | |
| 418 const int METHOD = 0; | |
| 419 const int GETTER = 1; | |
| 420 const int SETTER = 2; | |
| 421 int kind = METHOD; | |
| 422 if (isGetter) { | |
| 423 kind = GETTER; | |
| 424 } else if (isSetter) { | |
| 425 kind = SETTER; | |
| 426 } | |
| 427 return kind; | |
| 428 } | |
| 429 | |
| 430 bool appliesUnnamed(Element element, World world) { | |
| 431 assert(sameNameHack(element, world)); | |
| 432 return appliesUntyped(element, world); | |
| 433 } | |
| 434 | |
| 435 bool appliesUntyped(Element element, World world) { | |
| 436 assert(sameNameHack(element, world)); | |
| 437 if (Elements.isUnresolved(element)) return false; | |
| 438 if (isPrivateName(name) && library != element.library) return false; | |
| 439 if (world.isForeign(element)) return true; | |
| 440 if (element.isSetter) return isSetter; | |
| 441 if (element.isGetter) return isGetter || isCall; | |
| 442 if (element.isField) { | |
| 443 return isSetter | |
| 444 ? !element.isFinal && !element.isConst | |
| 445 : isGetter || isCall; | |
| 446 } | |
| 447 if (isGetter) return true; | |
| 448 if (isSetter) return false; | |
| 449 return signatureApplies(element); | |
| 450 } | |
| 451 | |
| 452 bool signatureApplies(FunctionElement function) { | |
| 453 FunctionSignature parameters = function.functionSignature; | |
| 454 if (argumentCount > parameters.parameterCount) return false; | |
| 455 int requiredParameterCount = parameters.requiredParameterCount; | |
| 456 int optionalParameterCount = parameters.optionalParameterCount; | |
| 457 if (positionalArgumentCount < requiredParameterCount) return false; | |
| 458 | |
| 459 if (!parameters.optionalParametersAreNamed) { | |
| 460 // We have already checked that the number of arguments are | |
| 461 // not greater than the number of parameters. Therefore the | |
| 462 // number of positional arguments are not greater than the | |
| 463 // number of parameters. | |
| 464 assert(positionalArgumentCount <= parameters.parameterCount); | |
| 465 return namedArguments.isEmpty; | |
| 466 } else { | |
| 467 if (positionalArgumentCount > requiredParameterCount) return false; | |
| 468 assert(positionalArgumentCount == requiredParameterCount); | |
| 469 if (namedArgumentCount > optionalParameterCount) return false; | |
| 470 Set<String> nameSet = new Set<String>(); | |
| 471 parameters.optionalParameters.forEach((Element element) { | |
| 472 nameSet.add(element.name); | |
| 473 }); | |
| 474 for (String name in namedArguments) { | |
| 475 if (!nameSet.contains(name)) return false; | |
| 476 // TODO(5213): By removing from the set we are checking | |
| 477 // that we are not passing the name twice. We should have this | |
| 478 // check in the resolver also. | |
| 479 nameSet.remove(name); | |
| 480 } | |
| 481 return true; | |
| 482 } | |
| 483 } | |
| 484 | |
| 485 bool sameNameHack(Element element, World world) { | |
| 486 // TODO(ngeoffray): Remove workaround checks. | |
| 487 return element.isConstructor || | |
| 488 name == element.name || | |
| 489 name == 'assert' && world.isAssertMethod(element); | |
| 490 } | |
| 491 | |
| 492 bool applies(Element element, World world) { | |
| 493 if (!sameNameHack(element, world)) return false; | |
| 494 return appliesUnnamed(element, world); | |
| 495 } | |
| 496 | |
| 497 /** | |
| 498 * Fills [list] with the arguments in the normalized order. | |
| 499 * | |
| 500 * [compileArgument] is a function that returns a compiled version | |
| 501 * of an argument located in [arguments]. | |
| 502 * | |
| 503 * [compileDefaultValue] is a function that returns a compiled constant | |
| 504 * of an optional argument that is not in [arguments]. | |
| 505 * | |
| 506 * Returns [:true:] if the selector and the [element] match; [:false:] | |
| 507 * otherwise. | |
| 508 * | |
| 509 * Invariant: [element] must be the implementation element. | |
| 510 */ | |
| 511 /*<T>*/ bool addArgumentsToList( | |
| 512 Link<Node> arguments, | |
| 513 List/*<T>*/ list, | |
| 514 FunctionElement element, | |
| 515 /*T*/ compileArgument(Node argument), | |
| 516 /*T*/ compileDefaultValue(ParameterElement element), | |
| 517 World world) { | |
| 518 assert(invariant(element, element.isImplementation)); | |
| 519 if (!this.applies(element, world)) return false; | |
| 520 | |
| 521 FunctionSignature parameters = element.functionSignature; | |
| 522 parameters.forEachRequiredParameter((ParameterElement element) { | |
| 523 list.add(compileArgument(arguments.head)); | |
| 524 arguments = arguments.tail; | |
| 525 }); | |
| 526 | |
| 527 if (!parameters.optionalParametersAreNamed) { | |
| 528 parameters.forEachOptionalParameter((ParameterElement element) { | |
| 529 if (!arguments.isEmpty) { | |
| 530 list.add(compileArgument(arguments.head)); | |
| 531 arguments = arguments.tail; | |
| 532 } else { | |
| 533 list.add(compileDefaultValue(element)); | |
| 534 } | |
| 535 }); | |
| 536 } else { | |
| 537 // Visit named arguments and add them into a temporary list. | |
| 538 List compiledNamedArguments = []; | |
| 539 for (; !arguments.isEmpty; arguments = arguments.tail) { | |
| 540 NamedArgument namedArgument = arguments.head; | |
| 541 compiledNamedArguments.add(compileArgument(namedArgument.expression)); | |
| 542 } | |
| 543 // Iterate over the optional parameters of the signature, and try to | |
| 544 // find them in [compiledNamedArguments]. If found, we use the | |
| 545 // value in the temporary list, otherwise the default value. | |
| 546 parameters.orderedOptionalParameters.forEach((ParameterElement element) { | |
| 547 int foundIndex = namedArguments.indexOf(element.name); | |
| 548 if (foundIndex != -1) { | |
| 549 list.add(compiledNamedArguments[foundIndex]); | |
| 550 } else { | |
| 551 list.add(compileDefaultValue(element)); | |
| 552 } | |
| 553 }); | |
| 554 } | |
| 555 return true; | |
| 556 } | |
| 557 | |
| 558 /** | |
| 559 * Fills [list] with the arguments in the order expected by | |
| 560 * [callee], and where [caller] is a synthesized element | |
| 561 * | |
| 562 * [compileArgument] is a function that returns a compiled version | |
| 563 * of a parameter of [callee]. | |
| 564 * | |
| 565 * [compileConstant] is a function that returns a compiled constant | |
| 566 * of an optional argument that is not in the parameters of [callee]. | |
| 567 * | |
| 568 * Returns [:true:] if the signature of the [caller] matches the | |
| 569 * signature of the [callee], [:false:] otherwise. | |
| 570 */ | |
| 571 static bool addForwardingElementArgumentsToList( | |
| 572 FunctionElement caller, | |
| 573 List list, | |
| 574 FunctionElement callee, | |
| 575 compileArgument(Element element), | |
| 576 compileConstant(Element element), | |
| 577 World world) { | |
| 578 | |
| 579 FunctionSignature signature = caller.functionSignature; | |
| 580 Map mapping = new Map(); | |
| 581 | |
| 582 // TODO(ngeoffray): This is a hack that fakes up AST nodes, so | |
| 583 // that we can call [addArgumentsToList]. | |
| 584 Link computeCallNodesFromParameters() { | |
| 585 LinkBuilder builder = new LinkBuilder(); | |
| 586 signature.forEachRequiredParameter((ParameterElement element) { | |
| 587 Node node = element.node; | |
| 588 mapping[node] = element; | |
| 589 builder.addLast(node); | |
| 590 }); | |
| 591 if (signature.optionalParametersAreNamed) { | |
| 592 signature.forEachOptionalParameter((ParameterElement element) { | |
| 593 mapping[element.initializer] = element; | |
| 594 builder.addLast(new NamedArgument(null, null, element.initializer)); | |
| 595 }); | |
| 596 } else { | |
| 597 signature.forEachOptionalParameter((ParameterElement element) { | |
| 598 Node node = element.node; | |
| 599 mapping[node] = element; | |
| 600 builder.addLast(node); | |
| 601 }); | |
| 602 } | |
| 603 return builder.toLink(); | |
| 604 } | |
| 605 | |
| 606 internalCompileArgument(Node node) { | |
| 607 return compileArgument(mapping[node]); | |
| 608 } | |
| 609 | |
| 610 Link<Node> nodes = computeCallNodesFromParameters(); | |
| 611 | |
| 612 // Synthesize a selector for the call. | |
| 613 // TODO(ngeoffray): Should the resolver do it instead? | |
| 614 List<String> namedParameters; | |
| 615 if (signature.optionalParametersAreNamed) { | |
| 616 namedParameters = | |
| 617 signature.optionalParameters.mapToList((e) => e.name); | |
| 618 } | |
| 619 Selector selector = new Selector.call(callee.name, | |
| 620 caller.library, | |
| 621 signature.parameterCount, | |
| 622 namedParameters); | |
| 623 | |
| 624 return selector.addArgumentsToList(nodes, | |
| 625 list, | |
| 626 callee, | |
| 627 internalCompileArgument, | |
| 628 compileConstant, | |
| 629 world); | |
| 630 } | |
| 631 | |
| 632 static bool sameNames(List<String> first, List<String> second) { | |
| 633 for (int i = 0; i < first.length; i++) { | |
| 634 if (first[i] != second[i]) return false; | |
| 635 } | |
| 636 return true; | |
| 637 } | |
| 638 | |
| 639 bool match(SelectorKind kind, | |
| 640 String name, | |
| 641 LibraryElement library, | |
| 642 int argumentCount, | |
| 643 List<String> namedArguments) { | |
| 644 return this.kind == kind | |
| 645 && this.name == name | |
| 646 && identical(this.library, library) | |
| 647 && this.argumentCount == argumentCount | |
| 648 && this.namedArguments.length == namedArguments.length | |
| 649 && sameNames(this.namedArguments, namedArguments); | |
| 650 } | |
| 651 | |
| 652 static int computeHashCode(SelectorKind kind, | |
| 653 String name, | |
| 654 LibraryElement library, | |
| 655 int argumentCount, | |
| 656 List<String> namedArguments) { | |
| 657 // Add bits from name and kind. | |
| 658 int hash = mixHashCodeBits(name.hashCode, kind.hashCode); | |
| 659 // Add bits from the library. | |
| 660 if (library != null) hash = mixHashCodeBits(hash, library.hashCode); | |
| 661 // Add bits from the unnamed arguments. | |
| 662 hash = mixHashCodeBits(hash, argumentCount); | |
| 663 // Add bits from the named arguments. | |
| 664 int named = namedArguments.length; | |
| 665 hash = mixHashCodeBits(hash, named); | |
| 666 for (int i = 0; i < named; i++) { | |
| 667 hash = mixHashCodeBits(hash, namedArguments[i].hashCode); | |
| 668 } | |
| 669 return hash; | |
| 670 } | |
| 671 | |
| 672 // TODO(kasperl): Move this out so it becomes useful in other places too? | |
| 673 static int mixHashCodeBits(int existing, int value) { | |
| 674 // Spread the bits of value. Try to stay in the 30-bit range to | |
| 675 // avoid overflowing into a more expensive integer representation. | |
| 676 int h = value & 0x1fffffff; | |
| 677 h += ((h & 0x3fff) << 15) ^ 0x1fffcd7d; | |
| 678 h ^= (h >> 10); | |
| 679 h += ((h & 0x3ffffff) << 3); | |
| 680 h ^= (h >> 6); | |
| 681 h += ((h & 0x7ffffff) << 2) + ((h & 0x7fff) << 14); | |
| 682 h ^= (h >> 16); | |
| 683 // Combine the two hash values. | |
| 684 int high = existing >> 15; | |
| 685 int low = existing & 0x7fff; | |
| 686 return ((high * 13) ^ (low * 997) ^ h) & SMI_MASK; | |
| 687 } | |
| 688 | |
| 689 List<String> getOrderedNamedArguments() { | |
| 690 if (namedArguments.isEmpty) return namedArguments; | |
| 691 if (!_orderedNamedArguments.isEmpty) return _orderedNamedArguments; | |
| 692 | |
| 693 _orderedNamedArguments.addAll(namedArguments); | |
| 694 _orderedNamedArguments.sort((String first, String second) { | |
| 695 return first.compareTo(second); | |
| 696 }); | |
| 697 return _orderedNamedArguments; | |
| 698 } | |
| 699 | |
| 700 String namedArgumentsToString() { | |
| 701 if (namedArgumentCount > 0) { | |
| 702 StringBuffer result = new StringBuffer(); | |
| 703 for (int i = 0; i < namedArgumentCount; i++) { | |
| 704 if (i != 0) result.write(', '); | |
| 705 result.write(namedArguments[i]); | |
| 706 } | |
| 707 return "[$result]"; | |
| 708 } | |
| 709 return ''; | |
| 710 } | |
| 711 | |
| 712 String toString() { | |
| 713 String named = ''; | |
| 714 String type = ''; | |
| 715 if (namedArgumentCount > 0) named = ', named=${namedArgumentsToString()}'; | |
| 716 if (mask != null) type = ', mask=$mask'; | |
| 717 return 'Selector($kind, $name, ' | |
| 718 'arity=$argumentCount$named$type)'; | |
| 719 } | |
| 720 | |
| 721 Selector extendIfReachesAll(Compiler compiler) { | |
| 722 return new TypedSelector( | |
| 723 compiler.typesTask.dynamicType, this, compiler.world); | |
| 724 } | |
| 725 | |
| 726 Selector toCallSelector() => new Selector.callClosureFrom(this); | |
| 727 } | |
| 728 | |
| 729 class TypedSelector extends Selector { | |
| 730 final Selector asUntyped; | |
| 731 final TypeMask mask; | |
| 732 | |
| 733 TypedSelector.internal(this.mask, Selector selector, int hashCode) | |
| 734 : asUntyped = selector, | |
| 735 super.internal(selector.kind, | |
| 736 selector.name, | |
| 737 selector.library, | |
| 738 selector.argumentCount, | |
| 739 selector.namedArguments, | |
| 740 selector._orderedNamedArguments, | |
| 741 hashCode) { | |
| 742 assert(mask != null); | |
| 743 assert(asUntyped.mask == null); | |
| 744 } | |
| 745 | |
| 746 static Map<Selector, Map<TypeMask, TypedSelector>> canonicalizedValues = | |
| 747 new Map<Selector, Map<TypeMask, TypedSelector>>(); | |
| 748 | |
| 749 factory TypedSelector(TypeMask mask, Selector selector, World world) { | |
| 750 // TODO(johnniwinther): Allow more TypeSelector kinds during resoluton. | |
| 751 assert(world.isClosed || mask.isExact); | |
| 752 if (selector.mask == mask) return selector; | |
| 753 Selector untyped = selector.asUntyped; | |
| 754 Map<TypeMask, TypedSelector> map = canonicalizedValues.putIfAbsent(untyped, | |
| 755 () => new Map<TypeMask, TypedSelector>()); | |
| 756 TypedSelector result = map[mask]; | |
| 757 if (result == null) { | |
| 758 int hashCode = Selector.mixHashCodeBits(untyped.hashCode, mask.hashCode); | |
| 759 result = map[mask] = new TypedSelector.internal(mask, untyped, hashCode); | |
| 760 } | |
| 761 return result; | |
| 762 } | |
| 763 | |
| 764 factory TypedSelector.exact( | |
| 765 ClassElement base, Selector selector, World world) | |
| 766 => new TypedSelector(new TypeMask.exact(base, world), selector, | |
| 767 world); | |
| 768 | |
| 769 factory TypedSelector.subclass( | |
| 770 ClassElement base, Selector selector, World world) | |
| 771 => new TypedSelector(new TypeMask.subclass(base, world), | |
| 772 selector, world); | |
| 773 | |
| 774 factory TypedSelector.subtype( | |
| 775 ClassElement base, Selector selector, World world) | |
| 776 => new TypedSelector(new TypeMask.subtype(base, world), | |
| 777 selector, world); | |
| 778 | |
| 779 bool appliesUnnamed(Element element, World world) { | |
| 780 assert(sameNameHack(element, world)); | |
| 781 // [TypedSelector] are only used after resolution. | |
| 782 if (!element.isClassMember) return false; | |
| 783 | |
| 784 // A closure can be called through any typed selector: | |
| 785 // class A { | |
| 786 // get foo => () => 42; | |
| 787 // bar() => foo(); // The call to 'foo' is a typed selector. | |
| 788 // } | |
| 789 if (element.enclosingClass.isClosure) { | |
| 790 return appliesUntyped(element, world); | |
| 791 } | |
| 792 | |
| 793 if (!mask.canHit(element, this, world)) return false; | |
| 794 return appliesUntyped(element, world); | |
| 795 } | |
| 796 | |
| 797 Selector extendIfReachesAll(Compiler compiler) { | |
| 798 bool canReachAll = compiler.enabledInvokeOn | |
| 799 && mask.needsNoSuchMethodHandling(this, compiler.world); | |
| 800 return canReachAll | |
| 801 ? new TypedSelector( | |
| 802 compiler.typesTask.dynamicType, this, compiler.world) | |
| 803 : this; | |
| 804 } | |
| 805 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 694353007:
Move dart2js from sdk/lib/_internal/compiler to pkg/compiler (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart