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| 1 // Copyright (c) 2013, 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 dart2js.js_emitter; | |
| 6 | |
| 7 /// This class should morph into something that makes it easy to build | |
| 8 /// JavaScript representations of libraries, class-sides, and instance-sides. | |
| 9 /// Initially, it is just a placeholder for code that is moved from | |
| 10 /// [CodeEmitterTask]. | |
| 11 class ContainerBuilder extends CodeEmitterHelper { | |
| 12 final Map<Element, Element> staticGetters = new Map<Element, Element>(); | |
| 13 | |
| 14 bool needsSuperGetter(FunctionElement element) => | |
| 15 compiler.codegenWorld.methodsNeedingSuperGetter.contains(element); | |
| 16 | |
| 17 /** | |
| 18 * Generate stubs to handle invocation of methods with optional | |
| 19 * arguments. | |
| 20 * | |
| 21 * A method like [: foo([x]) :] may be invoked by the following | |
| 22 * calls: [: foo(), foo(1), foo(x: 1) :]. See the sources of this | |
| 23 * function for detailed examples. | |
| 24 */ | |
| 25 void addParameterStub(FunctionElement member, | |
| 26 Selector selector, | |
| 27 AddStubFunction addStub, | |
| 28 Set<String> alreadyGenerated) { | |
| 29 FunctionSignature parameters = member.functionSignature; | |
| 30 int positionalArgumentCount = selector.positionalArgumentCount; | |
| 31 if (positionalArgumentCount == parameters.parameterCount) { | |
| 32 assert(selector.namedArgumentCount == 0); | |
| 33 return; | |
| 34 } | |
| 35 if (parameters.optionalParametersAreNamed | |
| 36 && selector.namedArgumentCount == parameters.optionalParameterCount) { | |
| 37 // If the selector has the same number of named arguments as the element, | |
| 38 // we don't need to add a stub. The call site will hit the method | |
| 39 // directly. | |
| 40 return; | |
| 41 } | |
| 42 JavaScriptConstantCompiler handler = backend.constants; | |
| 43 List<String> names = selector.getOrderedNamedArguments(); | |
| 44 | |
| 45 String invocationName = namer.invocationName(selector); | |
| 46 if (alreadyGenerated.contains(invocationName)) return; | |
| 47 alreadyGenerated.add(invocationName); | |
| 48 | |
| 49 bool isInterceptedMethod = backend.isInterceptedMethod(member); | |
| 50 | |
| 51 // If the method is intercepted, we need to also pass the actual receiver. | |
| 52 int extraArgumentCount = isInterceptedMethod ? 1 : 0; | |
| 53 // Use '$receiver' to avoid clashes with other parameter names. Using | |
| 54 // '$receiver' works because [:namer.safeName:] used for getting parameter | |
| 55 // names never returns a name beginning with a single '$'. | |
| 56 String receiverArgumentName = r'$receiver'; | |
| 57 | |
| 58 // The parameters that this stub takes. | |
| 59 List<jsAst.Parameter> parametersBuffer = | |
| 60 new List<jsAst.Parameter>(selector.argumentCount + extraArgumentCount); | |
| 61 // The arguments that will be passed to the real method. | |
| 62 List<jsAst.Expression> argumentsBuffer = | |
| 63 new List<jsAst.Expression>( | |
| 64 parameters.parameterCount + extraArgumentCount); | |
| 65 | |
| 66 int count = 0; | |
| 67 if (isInterceptedMethod) { | |
| 68 count++; | |
| 69 parametersBuffer[0] = new jsAst.Parameter(receiverArgumentName); | |
| 70 argumentsBuffer[0] = js('#', receiverArgumentName); | |
| 71 emitter.interceptorEmitter.interceptorInvocationNames.add(invocationName); | |
| 72 } | |
| 73 | |
| 74 int optionalParameterStart = positionalArgumentCount + extraArgumentCount; | |
| 75 // Includes extra receiver argument when using interceptor convention | |
| 76 int indexOfLastOptionalArgumentInParameters = optionalParameterStart - 1; | |
| 77 | |
| 78 int parameterIndex = 0; | |
| 79 parameters.orderedForEachParameter((ParameterElement element) { | |
| 80 String jsName = backend.namer.safeName(element.name); | |
| 81 assert(jsName != receiverArgumentName); | |
| 82 if (count < optionalParameterStart) { | |
| 83 parametersBuffer[count] = new jsAst.Parameter(jsName); | |
| 84 argumentsBuffer[count] = js('#', jsName); | |
| 85 } else { | |
| 86 int index = names.indexOf(element.name); | |
| 87 if (index != -1) { | |
| 88 indexOfLastOptionalArgumentInParameters = count; | |
| 89 // The order of the named arguments is not the same as the | |
| 90 // one in the real method (which is in Dart source order). | |
| 91 argumentsBuffer[count] = js('#', jsName); | |
| 92 parametersBuffer[optionalParameterStart + index] = | |
| 93 new jsAst.Parameter(jsName); | |
| 94 } else { | |
| 95 ConstantExpression constant = handler.getConstantForVariable(element); | |
| 96 if (constant == null) { | |
| 97 argumentsBuffer[count] = | |
| 98 emitter.constantReference(new NullConstantValue()); | |
| 99 } else { | |
| 100 ConstantValue value = constant.value; | |
| 101 if (!value.isNull) { | |
| 102 // If the value is the null constant, we should not pass it | |
| 103 // down to the native method. | |
| 104 indexOfLastOptionalArgumentInParameters = count; | |
| 105 } | |
| 106 argumentsBuffer[count] = emitter.constantReference(value); | |
| 107 } | |
| 108 } | |
| 109 } | |
| 110 count++; | |
| 111 }); | |
| 112 | |
| 113 var body; // List or jsAst.Statement. | |
| 114 if (member.hasFixedBackendName) { | |
| 115 body = emitter.nativeEmitter.generateParameterStubStatements( | |
| 116 member, isInterceptedMethod, invocationName, | |
| 117 parametersBuffer, argumentsBuffer, | |
| 118 indexOfLastOptionalArgumentInParameters); | |
| 119 } else if (member.isInstanceMember) { | |
| 120 if (needsSuperGetter(member)) { | |
| 121 ClassElement superClass = member.enclosingClass; | |
| 122 String methodName = namer.getNameOfInstanceMember(member); | |
| 123 // When redirecting, we must ensure that we don't end up in a subclass. | |
| 124 // We thus can't just invoke `this.foo$1.call(filledInArguments)`. | |
| 125 // Instead we need to call the statically resolved target. | |
| 126 // `<class>.prototype.bar$1.call(this, argument0, ...)`. | |
| 127 body = js.statement( | |
| 128 'return #.prototype.#.call(this, #);', | |
| 129 [backend.namer.elementAccess(superClass), methodName, | |
| 130 argumentsBuffer]); | |
| 131 } else { | |
| 132 body = js.statement( | |
| 133 'return this.#(#);', | |
| 134 [namer.getNameOfInstanceMember(member), argumentsBuffer]); | |
| 135 } | |
| 136 } else { | |
| 137 body = js.statement('return #(#)', | |
| 138 [namer.elementAccess(member), argumentsBuffer]); | |
| 139 } | |
| 140 | |
| 141 jsAst.Fun function = js('function(#) { #; }', [parametersBuffer, body]); | |
| 142 | |
| 143 addStub(selector, function); | |
| 144 } | |
| 145 | |
| 146 void addParameterStubs(FunctionElement member, AddStubFunction defineStub, | |
| 147 [bool canTearOff = false]) { | |
| 148 if (member.enclosingElement.isClosure) { | |
| 149 ClosureClassElement cls = member.enclosingElement; | |
| 150 if (cls.supertype.element == backend.boundClosureClass) { | |
| 151 compiler.internalError(cls.methodElement, 'Bound closure1.'); | |
| 152 } | |
| 153 if (cls.methodElement.isInstanceMember) { | |
| 154 compiler.internalError(cls.methodElement, 'Bound closure2.'); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 // We fill the lists depending on the selector. For example, | |
| 159 // take method foo: | |
| 160 // foo(a, b, {c, d}); | |
| 161 // | |
| 162 // We may have multiple ways of calling foo: | |
| 163 // (1) foo(1, 2); | |
| 164 // (2) foo(1, 2, c: 3); | |
| 165 // (3) foo(1, 2, d: 4); | |
| 166 // (4) foo(1, 2, c: 3, d: 4); | |
| 167 // (5) foo(1, 2, d: 4, c: 3); | |
| 168 // | |
| 169 // What we generate at the call sites are: | |
| 170 // (1) foo$2(1, 2); | |
| 171 // (2) foo$3$c(1, 2, 3); | |
| 172 // (3) foo$3$d(1, 2, 4); | |
| 173 // (4) foo$4$c$d(1, 2, 3, 4); | |
| 174 // (5) foo$4$c$d(1, 2, 3, 4); | |
| 175 // | |
| 176 // The stubs we generate are (expressed in Dart): | |
| 177 // (1) foo$2(a, b) => foo$4$c$d(a, b, null, null) | |
| 178 // (2) foo$3$c(a, b, c) => foo$4$c$d(a, b, c, null); | |
| 179 // (3) foo$3$d(a, b, d) => foo$4$c$d(a, b, null, d); | |
| 180 // (4) No stub generated, call is direct. | |
| 181 // (5) No stub generated, call is direct. | |
| 182 // | |
| 183 // We need to pay attention if this stub is for a function that has been | |
| 184 // invoked from a subclass. Then we cannot just redirect, since that | |
| 185 // would invoke the methods of the subclass. We have to compile to: | |
| 186 // (1) foo$2(a, b) => MyClass.foo$4$c$d.call(this, a, b, null, null) | |
| 187 // (2) foo$3$c(a, b, c) => MyClass.foo$4$c$d(this, a, b, c, null); | |
| 188 // (3) foo$3$d(a, b, d) => MyClass.foo$4$c$d(this, a, b, null, d); | |
| 189 | |
| 190 Set<Selector> selectors = member.isInstanceMember | |
| 191 ? compiler.codegenWorld.invokedNames[member.name] | |
| 192 : null; // No stubs needed for static methods. | |
| 193 | |
| 194 /// Returns all closure call selectors renamed to match this member. | |
| 195 Set<Selector> callSelectorsAsNamed() { | |
| 196 if (!canTearOff) return null; | |
| 197 Set<Selector> callSelectors = compiler.codegenWorld.invokedNames[ | |
| 198 namer.closureInvocationSelectorName]; | |
| 199 if (callSelectors == null) return null; | |
| 200 return callSelectors.map((Selector callSelector) { | |
| 201 return new Selector.call( | |
| 202 member.name, member.library, | |
| 203 callSelector.argumentCount, callSelector.namedArguments); | |
| 204 }).toSet(); | |
| 205 } | |
| 206 if (selectors == null) { | |
| 207 selectors = callSelectorsAsNamed(); | |
| 208 if (selectors == null) return; | |
| 209 } else { | |
| 210 Set<Selector> callSelectors = callSelectorsAsNamed(); | |
| 211 if (callSelectors != null) { | |
| 212 selectors = selectors.union(callSelectors); | |
| 213 } | |
| 214 } | |
| 215 Set<Selector> untypedSelectors = new Set<Selector>(); | |
| 216 if (selectors != null) { | |
| 217 for (Selector selector in selectors) { | |
| 218 if (!selector.appliesUnnamed(member, compiler.world)) continue; | |
| 219 if (untypedSelectors.add(selector.asUntyped)) { | |
| 220 // TODO(ahe): Is the last argument to [addParameterStub] needed? | |
| 221 addParameterStub(member, selector, defineStub, new Set<String>()); | |
| 222 } | |
| 223 } | |
| 224 } | |
| 225 if (canTearOff) { | |
| 226 selectors = compiler.codegenWorld.invokedNames[ | |
| 227 namer.closureInvocationSelectorName]; | |
| 228 if (selectors != null) { | |
| 229 for (Selector selector in selectors) { | |
| 230 selector = new Selector.call( | |
| 231 member.name, member.library, | |
| 232 selector.argumentCount, selector.namedArguments); | |
| 233 if (!selector.appliesUnnamed(member, compiler.world)) continue; | |
| 234 if (untypedSelectors.add(selector)) { | |
| 235 // TODO(ahe): Is the last argument to [addParameterStub] needed? | |
| 236 addParameterStub(member, selector, defineStub, new Set<String>()); | |
| 237 } | |
| 238 } | |
| 239 } | |
| 240 } | |
| 241 } | |
| 242 | |
| 243 /** | |
| 244 * Documentation wanted -- johnniwinther | |
| 245 * | |
| 246 * Invariant: [member] must be a declaration element. | |
| 247 */ | |
| 248 void emitCallStubForGetter(Element member, | |
| 249 Set<Selector> selectors, | |
| 250 AddPropertyFunction addProperty) { | |
| 251 assert(invariant(member, member.isDeclaration)); | |
| 252 LibraryElement memberLibrary = member.library; | |
| 253 // If the method is intercepted, the stub gets the | |
| 254 // receiver explicitely and we need to pass it to the getter call. | |
| 255 bool isInterceptedMethod = backend.isInterceptedMethod(member); | |
| 256 bool isInterceptorClass = | |
| 257 backend.isInterceptorClass(member.enclosingClass); | |
| 258 | |
| 259 const String receiverArgumentName = r'$receiver'; | |
| 260 | |
| 261 jsAst.Expression buildGetter() { | |
| 262 jsAst.Expression receiver = | |
| 263 js(isInterceptorClass ? receiverArgumentName : 'this'); | |
| 264 if (member.isGetter) { | |
| 265 String getterName = namer.getterName(member); | |
| 266 if (isInterceptedMethod) { | |
| 267 return js('this.#(#)', [getterName, receiver]); | |
| 268 } | |
| 269 return js('#.#()', [receiver, getterName]); | |
| 270 } else { | |
| 271 String fieldName = namer.instanceFieldPropertyName(member); | |
| 272 return js('#.#', [receiver, fieldName]); | |
| 273 } | |
| 274 } | |
| 275 | |
| 276 // Two selectors may match but differ only in type. To avoid generating | |
| 277 // identical stubs for each we track untyped selectors which already have | |
| 278 // stubs. | |
| 279 Set<Selector> generatedSelectors = new Set<Selector>(); | |
| 280 for (Selector selector in selectors) { | |
| 281 if (selector.applies(member, compiler.world)) { | |
| 282 selector = selector.asUntyped; | |
| 283 if (generatedSelectors.contains(selector)) continue; | |
| 284 generatedSelectors.add(selector); | |
| 285 | |
| 286 String invocationName = namer.invocationName(selector); | |
| 287 Selector callSelector = new Selector.callClosureFrom(selector); | |
| 288 String closureCallName = namer.invocationName(callSelector); | |
| 289 | |
| 290 List<jsAst.Parameter> parameters = <jsAst.Parameter>[]; | |
| 291 List<jsAst.Expression> arguments = <jsAst.Expression>[]; | |
| 292 if (isInterceptedMethod) { | |
| 293 parameters.add(new jsAst.Parameter(receiverArgumentName)); | |
| 294 } | |
| 295 | |
| 296 for (int i = 0; i < selector.argumentCount; i++) { | |
| 297 String name = 'arg$i'; | |
| 298 parameters.add(new jsAst.Parameter(name)); | |
| 299 arguments.add(js('#', name)); | |
| 300 } | |
| 301 | |
| 302 jsAst.Fun function = js( | |
| 303 'function(#) { return #.#(#); }', | |
| 304 [ parameters, buildGetter(), closureCallName, arguments]); | |
| 305 | |
| 306 compiler.dumpInfoTask.registerElementAst(member, | |
| 307 addProperty(invocationName, function)); | |
| 308 } | |
| 309 } | |
| 310 } | |
| 311 | |
| 312 /** | |
| 313 * Documentation wanted -- johnniwinther | |
| 314 * | |
| 315 * Invariant: [member] must be a declaration element. | |
| 316 */ | |
| 317 void emitExtraAccessors(Element member, ClassBuilder builder) { | |
| 318 assert(invariant(member, member.isDeclaration)); | |
| 319 if (member.isGetter || member.isField) { | |
| 320 Set<Selector> selectors = compiler.codegenWorld.invokedNames[member.name]; | |
| 321 if (selectors != null && !selectors.isEmpty) { | |
| 322 emitCallStubForGetter(member, selectors, builder.addProperty); | |
| 323 } | |
| 324 } | |
| 325 } | |
| 326 | |
| 327 void addMember(Element member, ClassBuilder builder) { | |
| 328 assert(invariant(member, member.isDeclaration)); | |
| 329 | |
| 330 if (member.isField) { | |
| 331 addMemberField(member, builder); | |
| 332 } else if (member.isFunction || | |
| 333 member.isGenerativeConstructorBody || | |
| 334 member.isGenerativeConstructor || | |
| 335 member.isAccessor) { | |
| 336 addMemberMethod(member, builder); | |
| 337 } else { | |
| 338 compiler.internalError(member, | |
| 339 'Unexpected kind: "${member.kind}".'); | |
| 340 } | |
| 341 if (member.isInstanceMember) emitExtraAccessors(member, builder); | |
| 342 } | |
| 343 | |
| 344 void addMemberMethod(FunctionElement member, ClassBuilder builder) { | |
| 345 MemberInfo info = analyzeMemberMethod(member); | |
| 346 if (info != null) { | |
| 347 addMemberMethodFromInfo(info, builder); | |
| 348 } | |
| 349 } | |
| 350 | |
| 351 MemberInfo analyzeMemberMethod(FunctionElement member) { | |
| 352 if (member.isAbstract) return null; | |
| 353 jsAst.Expression code = backend.generatedCode[member]; | |
| 354 if (code == null) return null; | |
| 355 String name = namer.getNameOfMember(member); | |
| 356 | |
| 357 FunctionSignature parameters = member.functionSignature; | |
| 358 bool needsStubs = !parameters.optionalParameters.isEmpty; | |
| 359 bool canTearOff = false; | |
| 360 bool isClosure = false; | |
| 361 bool isNotApplyTarget = !member.isFunction || | |
| 362 member.isConstructor || | |
| 363 member.isAccessor; | |
| 364 String tearOffName; | |
| 365 | |
| 366 final bool canBeReflected = backend.isAccessibleByReflection(member); | |
| 367 | |
| 368 if (isNotApplyTarget) { | |
| 369 canTearOff = false; | |
| 370 } else if (member.isInstanceMember) { | |
| 371 if (member.enclosingClass.isClosure) { | |
| 372 canTearOff = false; | |
| 373 isClosure = true; | |
| 374 } else { | |
| 375 // Careful with operators. | |
| 376 canTearOff = | |
| 377 compiler.codegenWorld.hasInvokedGetter(member, compiler.world) || | |
| 378 (canBeReflected && !member.isOperator); | |
| 379 assert(!needsSuperGetter(member) || canTearOff); | |
| 380 tearOffName = namer.getterName(member); | |
| 381 } | |
| 382 } else { | |
| 383 canTearOff = | |
| 384 compiler.codegenWorld.staticFunctionsNeedingGetter.contains(member) || | |
| 385 canBeReflected; | |
| 386 tearOffName = namer.getStaticClosureName(member); | |
| 387 } | |
| 388 final bool canBeApplied = compiler.enabledFunctionApply && | |
| 389 compiler.world.getMightBePassedToApply(member); | |
| 390 | |
| 391 final bool needStructuredInfo = | |
| 392 canTearOff || canBeReflected || canBeApplied; | |
| 393 | |
| 394 if (canTearOff) { | |
| 395 assert(invariant(member, !member.isGenerativeConstructor)); | |
| 396 assert(invariant(member, !member.isGenerativeConstructorBody)); | |
| 397 assert(invariant(member, !member.isConstructor)); | |
| 398 } | |
| 399 | |
| 400 return new MemberInfo( | |
| 401 member, | |
| 402 name, | |
| 403 parameters, | |
| 404 code, | |
| 405 needsStubs: needsStubs, | |
| 406 canTearOff: canTearOff, | |
| 407 isClosure: isClosure, | |
| 408 tearOffName: tearOffName, | |
| 409 canBeReflected: canBeReflected, | |
| 410 canBeApplied: canBeApplied, | |
| 411 needStructuredInfo: needStructuredInfo); | |
| 412 | |
| 413 } | |
| 414 | |
| 415 void addMemberMethodFromInfo(MemberInfo info, ClassBuilder builder) { | |
| 416 final FunctionElement member = info.member; | |
| 417 final String name = info.name; | |
| 418 final FunctionSignature parameters = info.parameters; | |
| 419 jsAst.Expression code = info.code; | |
| 420 final bool needsStubs = info.needsStubs; | |
| 421 final bool canTearOff = info.canTearOff; | |
| 422 final bool isClosure = info.isClosure; | |
| 423 final String tearOffName = info.tearOffName; | |
| 424 final bool canBeReflected = info.canBeReflected; | |
| 425 final bool canBeApplied = info.canBeApplied; | |
| 426 final bool needStructuredInfo = info.needStructuredInfo; | |
| 427 | |
| 428 emitter.interceptorEmitter.recordMangledNameOfMemberMethod(member, name); | |
| 429 | |
| 430 if (!needStructuredInfo) { | |
| 431 compiler.dumpInfoTask.registerElementAst(member, | |
| 432 builder.addProperty(name, code)); | |
| 433 if (needsStubs) { | |
| 434 addParameterStubs( | |
| 435 member, | |
| 436 (Selector selector, jsAst.Fun function) { | |
| 437 compiler.dumpInfoTask.registerElementAst(member, | |
| 438 builder.addProperty(namer.invocationName(selector), function))
; | |
| 439 }); | |
| 440 } | |
| 441 return; | |
| 442 } | |
| 443 | |
| 444 | |
| 445 // This element is needed for reflection or needs additional stubs. So we | |
| 446 // need to retain additional information. | |
| 447 | |
| 448 // The information is stored in an array with this format: | |
| 449 // | |
| 450 // 1. The JS function for this member. | |
| 451 // 2. First stub. | |
| 452 // 3. Name of first stub. | |
| 453 // ... | |
| 454 // M. Call name of this member. | |
| 455 // M+1. Call name of first stub. | |
| 456 // ... | |
| 457 // N. Getter name for tearOff. | |
| 458 // N+1. (Required parameter count << 1) + (member.isAccessor ? 1 : 0). | |
| 459 // N+2. (Optional parameter count << 1) + | |
| 460 // (parameters.optionalParametersAreNamed ? 1 : 0). | |
| 461 // N+3. Index to function type in constant pool. | |
| 462 // N+4. First default argument. | |
| 463 // ... | |
| 464 // O. First parameter name (if needed for reflection or Function.apply). | |
| 465 // ... | |
| 466 // P. Unmangled name (if reflectable). | |
| 467 // P+1. First metadata (if reflectable). | |
| 468 // ... | |
| 469 // TODO(ahe): Consider one of the parameter counts can be replaced by the | |
| 470 // length property of the JavaScript function object. | |
| 471 | |
| 472 List<jsAst.Expression> expressions = <jsAst.Expression>[]; | |
| 473 | |
| 474 String callSelectorString = 'null'; | |
| 475 if (member.isFunction) { | |
| 476 Selector callSelector = new Selector.fromElement(member).toCallSelector(); | |
| 477 callSelectorString = '"${namer.invocationName(callSelector)}"'; | |
| 478 } | |
| 479 | |
| 480 // On [requiredParameterCount], the lower bit is set if this method can be | |
| 481 // called reflectively. | |
| 482 int requiredParameterCount = parameters.requiredParameterCount << 1; | |
| 483 if (member.isAccessor) requiredParameterCount++; | |
| 484 | |
| 485 int optionalParameterCount = parameters.optionalParameterCount << 1; | |
| 486 if (parameters.optionalParametersAreNamed) optionalParameterCount++; | |
| 487 | |
| 488 expressions.add(code); | |
| 489 | |
| 490 // TODO(sra): Don't use LiteralString for non-strings. | |
| 491 List tearOffInfo = [new jsAst.LiteralString(callSelectorString)]; | |
| 492 | |
| 493 if (needsStubs || canTearOff) { | |
| 494 addParameterStubs(member, (Selector selector, jsAst.Fun function) { | |
| 495 expressions.add(function); | |
| 496 if (member.isInstanceMember) { | |
| 497 Set invokedSelectors = | |
| 498 compiler.codegenWorld.invokedNames[member.name]; | |
| 499 expressions.add(js.string(namer.invocationName(selector))); | |
| 500 } else { | |
| 501 expressions.add(js('null')); | |
| 502 // TOOD(ahe): Since we know when reading static data versus instance | |
| 503 // data, we can eliminate this element. | |
| 504 } | |
| 505 Set<Selector> callSelectors = compiler.codegenWorld.invokedNames[ | |
| 506 namer.closureInvocationSelectorName]; | |
| 507 Selector callSelector = selector.toCallSelector(); | |
| 508 String callSelectorString = 'null'; | |
| 509 if (canTearOff && callSelectors != null && | |
| 510 callSelectors.contains(callSelector)) { | |
| 511 callSelectorString = '"${namer.invocationName(callSelector)}"'; | |
| 512 } | |
| 513 tearOffInfo.add(new jsAst.LiteralString(callSelectorString)); | |
| 514 }, canTearOff); | |
| 515 } | |
| 516 | |
| 517 jsAst.Expression memberTypeExpression; | |
| 518 if (canTearOff || canBeReflected) { | |
| 519 DartType memberType; | |
| 520 if (member.isGenerativeConstructorBody) { | |
| 521 var body = member; | |
| 522 memberType = body.constructor.type; | |
| 523 } else { | |
| 524 memberType = member.type; | |
| 525 } | |
| 526 if (memberType.containsTypeVariables) { | |
| 527 jsAst.Expression thisAccess = js(r'this.$receiver'); | |
| 528 memberTypeExpression = | |
| 529 backend.rti.getSignatureEncoding(memberType, thisAccess); | |
| 530 } else { | |
| 531 memberTypeExpression = | |
| 532 js.number(emitter.metadataEmitter.reifyType(memberType)); | |
| 533 } | |
| 534 } else { | |
| 535 memberTypeExpression = js('null'); | |
| 536 } | |
| 537 | |
| 538 expressions | |
| 539 ..addAll(tearOffInfo) | |
| 540 ..add((tearOffName == null || member.isAccessor) | |
| 541 ? js("null") : js.string(tearOffName)) | |
| 542 ..add(js.number(requiredParameterCount)) | |
| 543 ..add(js.number(optionalParameterCount)) | |
| 544 ..add(memberTypeExpression) | |
| 545 ..addAll(emitter.metadataEmitter | |
| 546 .reifyDefaultArguments(member).map(js.number)); | |
| 547 | |
| 548 if (canBeReflected || canBeApplied) { | |
| 549 parameters.forEachParameter((Element parameter) { | |
| 550 expressions.add( | |
| 551 js.number(emitter.metadataEmitter.reifyName(parameter.name))); | |
| 552 if (backend.mustRetainMetadata) { | |
| 553 Iterable<int> metadataIndices = | |
| 554 parameter.metadata.map((MetadataAnnotation annotation) { | |
| 555 ConstantValue constant = | |
| 556 backend.constants.getConstantForMetadata(annotation).value; | |
| 557 backend.constants.addCompileTimeConstantForEmission(constant); | |
| 558 return emitter.metadataEmitter.reifyMetadata(annotation); | |
| 559 }); | |
| 560 expressions.add( | |
| 561 new jsAst.ArrayInitializer.from(metadataIndices.map(js.number))); | |
| 562 } | |
| 563 }); | |
| 564 } | |
| 565 if (canBeReflected) { | |
| 566 jsAst.LiteralString reflectionName; | |
| 567 if (member.isConstructor) { | |
| 568 String reflectionNameString = emitter.getReflectionName(member, name); | |
| 569 reflectionName = | |
| 570 new jsAst.LiteralString( | |
| 571 '"new ${Elements.reconstructConstructorName(member)}"'); | |
| 572 } else { | |
| 573 reflectionName = | |
| 574 js.string(namer.privateName(member.library, member.name)); | |
| 575 } | |
| 576 expressions | |
| 577 ..add(reflectionName) | |
| 578 ..addAll(emitter.metadataEmitter | |
| 579 .computeMetadata(member).map(js.number)); | |
| 580 } else if (isClosure && canBeApplied) { | |
| 581 expressions.add(js.string(namer.privateName(member.library, | |
| 582 member.name))); | |
| 583 } | |
| 584 jsAst.ArrayInitializer arrayInit = | |
| 585 new jsAst.ArrayInitializer.from(expressions); | |
| 586 compiler.dumpInfoTask.registerElementAst(member, | |
| 587 builder.addProperty(name, arrayInit)); | |
| 588 } | |
| 589 | |
| 590 void addMemberField(VariableElement member, ClassBuilder builder) { | |
| 591 // For now, do nothing. | |
| 592 } | |
| 593 } | |
| 594 | |
| 595 class MemberInfo { | |
| 596 final FunctionElement member; | |
| 597 | |
| 598 final String name; | |
| 599 | |
| 600 final FunctionSignature parameters; | |
| 601 | |
| 602 final jsAst.Expression code; | |
| 603 | |
| 604 final bool needsStubs; | |
| 605 | |
| 606 final bool canTearOff; | |
| 607 | |
| 608 final bool isClosure; | |
| 609 | |
| 610 final String tearOffName; | |
| 611 | |
| 612 final bool canBeReflected; | |
| 613 | |
| 614 final bool canBeApplied; | |
| 615 | |
| 616 final bool needStructuredInfo; | |
| 617 | |
| 618 MemberInfo( | |
| 619 this.member, | |
| 620 this.name, | |
| 621 this.parameters, | |
| 622 this.code, | |
| 623 {this.needsStubs, | |
| 624 this.canTearOff, | |
| 625 this.isClosure, | |
| 626 this.tearOffName, | |
| 627 this.canBeReflected, | |
| 628 this.canBeApplied, | |
| 629 this.needStructuredInfo}) { | |
| 630 assert(member != null); | |
| 631 assert(name != null); | |
| 632 assert(parameters != null); | |
| 633 assert(code != null); | |
| 634 assert(needsStubs != null); | |
| 635 assert(canTearOff != null); | |
| 636 assert(isClosure != null); | |
| 637 assert(tearOffName != null || !canTearOff); | |
| 638 assert(canBeReflected != null); | |
| 639 assert(canBeApplied != null); | |
| 640 assert(needStructuredInfo != null); | |
| 641 } | |
| 642 } | |
| 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