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| 1 // Copyright (c) 2016, 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 library kernel.analyzer.loader; | |
| 5 | |
| 6 import 'dart:async'; | |
| 7 import 'dart:convert'; | |
| 8 import 'dart:io' as io; | |
| 9 | |
| 10 import 'package:analyzer/analyzer.dart'; | |
| 11 import 'package:analyzer/file_system/file_system.dart'; | |
| 12 import 'package:analyzer/file_system/physical_file_system.dart'; | |
| 13 import 'package:analyzer/source/package_map_resolver.dart'; | |
| 14 import 'package:analyzer/src/dart/scanner/scanner.dart'; | |
| 15 import 'package:analyzer/src/dart/sdk/sdk.dart'; | |
| 16 import 'package:analyzer/src/generated/engine.dart'; | |
| 17 import 'package:analyzer/src/generated/parser.dart'; | |
| 18 import 'package:analyzer/src/generated/sdk.dart'; | |
| 19 import 'package:analyzer/src/generated/source_io.dart'; | |
| 20 import 'package:analyzer/src/summary/summary_sdk.dart'; | |
| 21 import 'package:kernel/application_root.dart'; | |
| 22 import 'package:package_config/discovery.dart'; | |
| 23 import 'package:package_config/packages.dart'; | |
| 24 | |
| 25 import '../ast.dart' as ast; | |
| 26 import '../target/targets.dart' show Target; | |
| 27 import '../type_algebra.dart'; | |
| 28 import 'analyzer.dart'; | |
| 29 import 'ast_from_analyzer.dart'; | |
| 30 | |
| 31 /// Options passed to the Dart frontend. | |
| 32 class DartOptions { | |
| 33 /// True if user code should be loaded in strong mode. | |
| 34 bool strongMode; | |
| 35 | |
| 36 /// True if the Dart SDK should be loaded in strong mode. | |
| 37 bool strongModeSdk; | |
| 38 | |
| 39 /// Path to the sdk sources, ignored if sdkSummary is provided. | |
| 40 String sdk; | |
| 41 | |
| 42 /// Path to a summary of the sdk sources. | |
| 43 String sdkSummary; | |
| 44 | |
| 45 /// Path to the `.packages` file. | |
| 46 String packagePath; | |
| 47 | |
| 48 /// Root used to relativize app file-urls, making them machine agnostic. | |
| 49 ApplicationRoot applicationRoot; | |
| 50 | |
| 51 Map<Uri, Uri> customUriMappings; | |
| 52 | |
| 53 /// Environment definitions provided via `-Dkey=value`. | |
| 54 Map<String, String> declaredVariables; | |
| 55 | |
| 56 DartOptions( | |
| 57 {bool strongMode: false, | |
| 58 bool strongModeSdk, | |
| 59 this.sdk, | |
| 60 this.sdkSummary, | |
| 61 this.packagePath, | |
| 62 ApplicationRoot applicationRoot, | |
| 63 Map<Uri, Uri> customUriMappings, | |
| 64 Map<String, String> declaredVariables}) | |
| 65 : this.customUriMappings = customUriMappings ?? <Uri, Uri>{}, | |
| 66 this.declaredVariables = declaredVariables ?? <String, String>{}, | |
| 67 this.strongMode = strongMode, | |
| 68 this.strongModeSdk = strongModeSdk ?? strongMode, | |
| 69 this.applicationRoot = applicationRoot ?? new ApplicationRoot.none(); | |
| 70 } | |
| 71 | |
| 72 abstract class ReferenceLevelLoader { | |
| 73 ast.Library getLibraryReference(LibraryElement element); | |
| 74 ast.Class getClassReference(ClassElement element); | |
| 75 ast.Member getMemberReference(Element element); | |
| 76 ast.Class getRootClassReference(); | |
| 77 ast.Constructor getRootClassConstructorReference(); | |
| 78 ast.Class getCoreClassReference(String className); | |
| 79 ast.Constructor getCoreClassConstructorReference(String className, | |
| 80 {String constructorName, String library}); | |
| 81 ast.TypeParameter tryGetClassTypeParameter(TypeParameterElement element); | |
| 82 ast.Class getSharedMixinApplicationClass( | |
| 83 ast.Library library, ast.Class supertype, ast.Class mixin); | |
| 84 bool get strongMode; | |
| 85 | |
| 86 /// Whether or not to include redirecting factories in the output. | |
| 87 bool get ignoreRedirectingFactories; | |
| 88 } | |
| 89 | |
| 90 class DartLoader implements ReferenceLevelLoader { | |
| 91 final ast.Program program; | |
| 92 final ApplicationRoot applicationRoot; | |
| 93 final Bimap<ClassElement, ast.Class> _classes = | |
| 94 new Bimap<ClassElement, ast.Class>(); | |
| 95 final Bimap<Element, ast.Member> _members = new Bimap<Element, ast.Member>(); | |
| 96 final Map<TypeParameterElement, ast.TypeParameter> _classTypeParameters = | |
| 97 <TypeParameterElement, ast.TypeParameter>{}; | |
| 98 final Map<ast.Library, Map<String, ast.Class>> _mixinApplications = | |
| 99 <ast.Library, Map<String, ast.Class>>{}; | |
| 100 final Map<LibraryElement, ast.Library> _libraries = | |
| 101 <LibraryElement, ast.Library>{}; | |
| 102 final AnalysisContext context; | |
| 103 LibraryElement _dartCoreLibrary; | |
| 104 final List errors = []; | |
| 105 final List libraryElements = []; | |
| 106 | |
| 107 /// Classes that have been referenced, and must be promoted to type level | |
| 108 /// so as not to expose partially initialized classes. | |
| 109 final List<ast.Class> temporaryClassWorklist = []; | |
| 110 | |
| 111 final Map<LibraryElement, List<ClassElement>> mixinLibraryWorklist = {}; | |
| 112 | |
| 113 final bool ignoreRedirectingFactories; | |
| 114 | |
| 115 LibraryElement _libraryBeingLoaded = null; | |
| 116 ClassElement _classBeingPromotedToMixin = null; | |
| 117 | |
| 118 bool get strongMode => context.analysisOptions.strongMode; | |
| 119 | |
| 120 DartLoader(this.program, DartOptions options, Packages packages, | |
| 121 {DartSdk dartSdk, | |
| 122 AnalysisContext context, | |
| 123 this.ignoreRedirectingFactories: true}) | |
| 124 : this.context = | |
| 125 context ?? createContext(options, packages, dartSdk: dartSdk), | |
| 126 this.applicationRoot = options.applicationRoot; | |
| 127 | |
| 128 String getLibraryName(LibraryElement element) { | |
| 129 return element.name.isEmpty ? null : element.name; | |
| 130 } | |
| 131 | |
| 132 LibraryElement getLibraryElementFromUri(Uri uri) { | |
| 133 var source = context.sourceFactory.forUri2(uri); | |
| 134 if (source == null) return null; | |
| 135 return context.computeLibraryElement(source); | |
| 136 } | |
| 137 | |
| 138 ast.Library getLibraryReference(LibraryElement element) { | |
| 139 var uri = applicationRoot.relativeUri(element.source.uri); | |
| 140 var library = _libraries[element]; | |
| 141 if (library == null) { | |
| 142 library = new ast.Library(uri) | |
| 143 ..isExternal = true | |
| 144 ..name = getLibraryName(element) | |
| 145 ..fileUri = '${element.source.uri}'; | |
| 146 program.libraries.add(library..parent = program); | |
| 147 _libraries[element] = library; | |
| 148 } | |
| 149 return library; | |
| 150 } | |
| 151 | |
| 152 ast.Library getLibraryReferenceFromUri(Uri uri) { | |
| 153 return getLibraryReference(getLibraryElementFromUri(uri)); | |
| 154 } | |
| 155 | |
| 156 void _buildTopLevelMember( | |
| 157 ast.Member member, Element element, Declaration astNode) { | |
| 158 assert(member.parent != null); | |
| 159 new MemberBodyBuilder(this, member, element).build(astNode); | |
| 160 } | |
| 161 | |
| 162 /// True if [element] is in the process of being loaded by | |
| 163 /// [_buildLibraryBody]. | |
| 164 /// | |
| 165 /// If this is the case, we should avoid adding new members to the classes | |
| 166 /// in the library, since the AST builder will rebuild the member lists. | |
| 167 bool isLibraryBeingLoaded(LibraryElement element) { | |
| 168 return _libraryBeingLoaded == element; | |
| 169 } | |
| 170 | |
| 171 bool isClassBeingPromotedToMixin(ClassElement element) { | |
| 172 return _classBeingPromotedToMixin == element; | |
| 173 } | |
| 174 | |
| 175 void _buildLibraryBody(LibraryElement element, ast.Library library, | |
| 176 List<CompilationUnit> units) { | |
| 177 assert(_libraryBeingLoaded == null); | |
| 178 _libraryBeingLoaded = element; | |
| 179 var classes = <ast.Class>[]; | |
| 180 var procedures = <ast.Procedure>[]; | |
| 181 var fields = <ast.Field>[]; | |
| 182 | |
| 183 void loadClass(NamedCompilationUnitMember declaration) { | |
| 184 // [declaration] can be a ClassDeclaration, EnumDeclaration, or a | |
| 185 // ClassTypeAlias. | |
| 186 ClassElement element = declaration.element; | |
| 187 var node = getClassReference(element); | |
| 188 promoteToBodyLevel(node, element, declaration); | |
| 189 classes.add(node); | |
| 190 } | |
| 191 | |
| 192 void loadProcedure(FunctionDeclaration declaration) { | |
| 193 var element = declaration.element; | |
| 194 var node = getMemberReference(element); | |
| 195 _buildTopLevelMember(node, element, declaration); | |
| 196 procedures.add(node); | |
| 197 } | |
| 198 | |
| 199 void loadField(TopLevelVariableDeclaration declaration) { | |
| 200 for (var field in declaration.variables.variables) { | |
| 201 var element = field.element; | |
| 202 // Ignore fields inserted through error recovery. | |
| 203 if (element.name == '') continue; | |
| 204 var node = getMemberReference(element); | |
| 205 _buildTopLevelMember(node, element, field); | |
| 206 fields.add(node); | |
| 207 } | |
| 208 } | |
| 209 | |
| 210 for (var unit in units) { | |
| 211 for (CompilationUnitMember declaration in unit.declarations) { | |
| 212 if (declaration is ClassDeclaration || | |
| 213 declaration is EnumDeclaration || | |
| 214 declaration is ClassTypeAlias) { | |
| 215 loadClass(declaration); | |
| 216 } else if (declaration is FunctionDeclaration) { | |
| 217 loadProcedure(declaration); | |
| 218 } else if (declaration is TopLevelVariableDeclaration) { | |
| 219 loadField(declaration); | |
| 220 } else if (declaration is FunctionTypeAlias) { | |
| 221 // Nothing to do. Typedefs are handled lazily while constructing type | |
| 222 // references. | |
| 223 } else { | |
| 224 throw "unexpected node: ${declaration.runtimeType} $declaration"; | |
| 225 } | |
| 226 } | |
| 227 } | |
| 228 libraryElements.add(element); | |
| 229 _iterateTemporaryClassWorklist(); | |
| 230 // Ensure everything is stored in the original declaration order. | |
| 231 library.classes | |
| 232 ..clear() | |
| 233 ..addAll(classes) | |
| 234 ..addAll(_mixinApplications[library]?.values ?? const []); | |
| 235 library.fields | |
| 236 ..clear() | |
| 237 ..addAll(fields); | |
| 238 library.procedures | |
| 239 ..clear() | |
| 240 ..addAll(procedures); | |
| 241 _libraryBeingLoaded = null; | |
| 242 } | |
| 243 | |
| 244 LibraryElement getDartCoreLibrary() { | |
| 245 return _dartCoreLibrary ??= _findLibraryElement('dart:core'); | |
| 246 } | |
| 247 | |
| 248 LibraryElement _findLibraryElement(String uri) { | |
| 249 var source = context.sourceFactory.forUri(uri); | |
| 250 if (source == null) return null; | |
| 251 return context.computeLibraryElement(source); | |
| 252 } | |
| 253 | |
| 254 ast.Class getRootClassReference() { | |
| 255 return getCoreClassReference('Object'); | |
| 256 } | |
| 257 | |
| 258 ast.Constructor getRootClassConstructorReference() { | |
| 259 var element = getDartCoreLibrary().getType('Object').constructors[0]; | |
| 260 return getMemberReference(element); | |
| 261 } | |
| 262 | |
| 263 ast.Class getCoreClassReference(String className) { | |
| 264 return getClassReference(getDartCoreLibrary().getType(className)); | |
| 265 } | |
| 266 | |
| 267 ast.Constructor getCoreClassConstructorReference(String className, | |
| 268 {String constructorName, String library}) { | |
| 269 LibraryElement libraryElement = | |
| 270 library != null ? _findLibraryElement(library) : getDartCoreLibrary(); | |
| 271 ClassElement element = libraryElement.getType(className); | |
| 272 if (element == null) { | |
| 273 throw 'Missing core class $className from ${libraryElement.name}'; | |
| 274 } | |
| 275 var constructor = element.constructors.firstWhere((constructor) { | |
| 276 return (constructorName == null) | |
| 277 ? (constructor.nameLength == 0) | |
| 278 : (constructor.name == constructorName); | |
| 279 }); | |
| 280 return getMemberReference(constructor); | |
| 281 } | |
| 282 | |
| 283 ClassElement getClassElement(ast.Class node) { | |
| 284 return _classes.inverse[node]; | |
| 285 } | |
| 286 | |
| 287 void addMixinClassToLibrary(ast.Class class_, ast.Library library) { | |
| 288 assert(class_.parent == null); | |
| 289 library.addClass(class_); | |
| 290 var map = | |
| 291 _mixinApplications.putIfAbsent(library, () => <String, ast.Class>{}); | |
| 292 map[class_.name] = class_; | |
| 293 } | |
| 294 | |
| 295 /// Returns the IR for a class, at a temporary loading level. | |
| 296 /// | |
| 297 /// The returned class has the correct name, flags, type parameter arity, | |
| 298 /// and enclosing library. | |
| 299 ast.Class getClassReference(ClassElement element) { | |
| 300 var classNode = _classes[element]; | |
| 301 if (classNode != null) return classNode; | |
| 302 _classes[element] = classNode = new ast.Class( | |
| 303 name: element.name, | |
| 304 isAbstract: element.isAbstract, | |
| 305 fileUri: '${element.source.uri}')..fileOffset = element.nameOffset; | |
| 306 classNode.level = ast.ClassLevel.Temporary; | |
| 307 var library = getLibraryReference(element.library); | |
| 308 library.addClass(classNode); | |
| 309 // Initialize type parameter list without bounds. | |
| 310 for (var parameter in element.typeParameters) { | |
| 311 var parameterNode = new ast.TypeParameter(parameter.name); | |
| 312 _classTypeParameters[parameter] = parameterNode; | |
| 313 classNode.typeParameters.add(parameterNode); | |
| 314 parameterNode.parent = classNode; | |
| 315 } | |
| 316 // Ensure the class is at least promoted to type level before exposing it | |
| 317 // to kernel consumers. | |
| 318 temporaryClassWorklist.add(classNode); | |
| 319 return classNode; | |
| 320 } | |
| 321 | |
| 322 /// Ensures the supertypes and type parameter bounds have been generated for | |
| 323 /// the given class. | |
| 324 void promoteToTypeLevel(ast.Class classNode) { | |
| 325 if (classNode.level.index >= ast.ClassLevel.Type.index) return; | |
| 326 classNode.level = ast.ClassLevel.Type; | |
| 327 var element = getClassElement(classNode); | |
| 328 assert(element != null); | |
| 329 var library = getLibraryReference(element.library); | |
| 330 var scope = new ClassScope(this, library); | |
| 331 // Initialize bounds on type parameters. | |
| 332 for (int i = 0; i < classNode.typeParameters.length; ++i) { | |
| 333 var parameter = element.typeParameters[i]; | |
| 334 var parameterNode = classNode.typeParameters[i]; | |
| 335 parameterNode.bound = parameter.bound == null | |
| 336 ? scope.defaultTypeParameterBound | |
| 337 : scope.buildType(parameter.bound); | |
| 338 } | |
| 339 // Initialize supertypes. | |
| 340 Iterable<InterfaceType> mixins = element.mixins; | |
| 341 if (element.isMixinApplication && mixins.isNotEmpty) { | |
| 342 classNode.mixedInType = scope.buildSupertype(mixins.last); | |
| 343 mixins = mixins.take(mixins.length - 1); | |
| 344 } | |
| 345 if (element.supertype != null) { | |
| 346 ast.Supertype supertype = scope.buildSupertype(element.supertype); | |
| 347 bool useSharedMixin = true; | |
| 348 for (var mixin in mixins) { | |
| 349 var mixinType = scope.buildSupertype(mixin); | |
| 350 if (useSharedMixin && | |
| 351 areDistinctUnboundTypeVariables(supertype, mixinType)) { | |
| 352 // Use a shared mixin application class for this library. | |
| 353 var mixinClass = getSharedMixinApplicationClass( | |
| 354 scope.currentLibrary, supertype.classNode, mixinType.classNode); | |
| 355 if (mixinClass.fileOffset < 0) { | |
| 356 mixinClass.fileOffset = element.nameOffset; | |
| 357 } | |
| 358 supertype = new ast.Supertype( | |
| 359 mixinClass, | |
| 360 supertype.typeArguments.length > mixinType.typeArguments.length | |
| 361 ? supertype.typeArguments | |
| 362 : mixinType.typeArguments); | |
| 363 } else { | |
| 364 // Generate a new class specific for this mixin application. | |
| 365 var freshParameters = | |
| 366 getFreshTypeParameters(classNode.typeParameters); | |
| 367 var mixinClass = new ast.Class( | |
| 368 name: '${classNode.name}^${mixinType.classNode.name}', | |
| 369 isAbstract: true, | |
| 370 typeParameters: freshParameters.freshTypeParameters, | |
| 371 supertype: freshParameters.substituteSuper(supertype), | |
| 372 mixedInType: freshParameters.substituteSuper(mixinType), | |
| 373 fileUri: classNode.fileUri)..fileOffset = element.nameOffset; | |
| 374 mixinClass.level = ast.ClassLevel.Type; | |
| 375 addMixinClassToLibrary(mixinClass, classNode.enclosingLibrary); | |
| 376 supertype = new ast.Supertype(mixinClass, | |
| 377 classNode.typeParameters.map(makeTypeParameterType).toList()); | |
| 378 // This class cannot be used from anywhere else, so don't try to | |
| 379 // generate shared mixin applications using it. | |
| 380 useSharedMixin = false; | |
| 381 } | |
| 382 } | |
| 383 classNode.supertype = supertype; | |
| 384 for (var implementedType in element.interfaces) { | |
| 385 classNode.implementedTypes.add(scope.buildSupertype(implementedType)); | |
| 386 } | |
| 387 } | |
| 388 } | |
| 389 | |
| 390 void promoteToHierarchyLevel(ast.Class classNode) { | |
| 391 if (classNode.level.index >= ast.ClassLevel.Hierarchy.index) return; | |
| 392 promoteToTypeLevel(classNode); | |
| 393 classNode.level = ast.ClassLevel.Hierarchy; | |
| 394 var element = getClassElement(classNode); | |
| 395 if (element != null) { | |
| 396 // Ensure all instance members are at present. | |
| 397 for (var field in element.fields) { | |
| 398 if (!field.isStatic && !field.isSynthetic) { | |
| 399 getMemberReference(field); | |
| 400 } | |
| 401 } | |
| 402 for (var accessor in element.accessors) { | |
| 403 if (!accessor.isStatic && !accessor.isSynthetic) { | |
| 404 getMemberReference(accessor); | |
| 405 } | |
| 406 } | |
| 407 for (var method in element.methods) { | |
| 408 if (!method.isStatic && !method.isSynthetic) { | |
| 409 getMemberReference(method); | |
| 410 } | |
| 411 } | |
| 412 } | |
| 413 for (var supertype in classNode.supers) { | |
| 414 promoteToHierarchyLevel(supertype.classNode); | |
| 415 } | |
| 416 } | |
| 417 | |
| 418 void promoteToMixinLevel(ast.Class classNode, ClassElement element, | |
| 419 NamedCompilationUnitMember astNode) { | |
| 420 if (classNode.level.index >= ast.ClassLevel.Mixin.index) return; | |
| 421 _classBeingPromotedToMixin = element; | |
| 422 promoteToHierarchyLevel(classNode); | |
| 423 classNode.level = ast.ClassLevel.Mixin; | |
| 424 // Clear out the member references that were put in the class. | |
| 425 // The AST builder will load them all put back in the right order. | |
| 426 classNode..fields.clear()..procedures.clear()..constructors.clear(); | |
| 427 new ClassBodyBuilder(this, classNode, element).build(astNode); | |
| 428 _classBeingPromotedToMixin = null; | |
| 429 | |
| 430 // Ensure mixed-in classes are available. | |
| 431 for (var mixin in element.mixins) { | |
| 432 _ensureMixinBecomesLoaded(mixin.element); | |
| 433 } | |
| 434 } | |
| 435 | |
| 436 /// Ensures that [element] eventually becomes loaded at least at mixin level. | |
| 437 void _ensureMixinBecomesLoaded(ClassElement element) { | |
| 438 if (isClassBeingPromotedToMixin(element)) { | |
| 439 return; | |
| 440 } | |
| 441 var class_ = getClassReference(element); | |
| 442 if (class_.level.index >= ast.ClassLevel.Mixin.index) { | |
| 443 return; | |
| 444 } | |
| 445 var list = mixinLibraryWorklist[element.library] ??= <ClassElement>[]; | |
| 446 list.add(element); | |
| 447 } | |
| 448 | |
| 449 void promoteToBodyLevel(ast.Class classNode, ClassElement element, | |
| 450 NamedCompilationUnitMember astNode) { | |
| 451 if (classNode.level == ast.ClassLevel.Body) return; | |
| 452 promoteToMixinLevel(classNode, element, astNode); | |
| 453 classNode.level = ast.ClassLevel.Body; | |
| 454 // This frontend delivers the same contents for classes at body and mixin | |
| 455 // levels, even though as specified, the mixin level does not require all | |
| 456 // the static members to be present. So no additional work is needed. | |
| 457 } | |
| 458 | |
| 459 ast.TypeParameter tryGetClassTypeParameter(TypeParameterElement element) { | |
| 460 return _classTypeParameters[element]; | |
| 461 } | |
| 462 | |
| 463 Element getMemberElement(ast.Member node) { | |
| 464 return _members.inverse[node]; | |
| 465 } | |
| 466 | |
| 467 ast.Member getMemberReference(Element element) { | |
| 468 assert(element != null); | |
| 469 assert(element is! Member); // Use the "base element". | |
| 470 return _members[element] ??= _buildMemberReference(element); | |
| 471 } | |
| 472 | |
| 473 ast.Member _buildMemberReference(Element element) { | |
| 474 assert(element != null); | |
| 475 var member = _buildOrphanedMemberReference(element); | |
| 476 // Set the parent pointer and store it in the enclosing class or library. | |
| 477 // If the enclosing library is being built from the AST, do not add the | |
| 478 // member, since the AST builder will put it in there. | |
| 479 var parent = element.enclosingElement; | |
| 480 if (parent is ClassElement) { | |
| 481 var class_ = getClassReference(parent); | |
| 482 member.parent = class_; | |
| 483 if (!isLibraryBeingLoaded(element.library)) { | |
| 484 class_.addMember(member); | |
| 485 } | |
| 486 } else { | |
| 487 var library = getLibraryReference(element.library); | |
| 488 member.parent = library; | |
| 489 if (!isLibraryBeingLoaded(element.library)) { | |
| 490 library.addMember(member); | |
| 491 } | |
| 492 } | |
| 493 return member; | |
| 494 } | |
| 495 | |
| 496 ast.Member _buildOrphanedMemberReference(Element element) { | |
| 497 assert(element != null); | |
| 498 ClassElement classElement = element.enclosingElement is ClassElement | |
| 499 ? element.enclosingElement | |
| 500 : null; | |
| 501 TypeScope scope = classElement != null | |
| 502 ? new ClassScope(this, getLibraryReference(element.library)) | |
| 503 : new TypeScope(this); | |
| 504 if (classElement != null) { | |
| 505 getClassReference(classElement); | |
| 506 } | |
| 507 switch (element.kind) { | |
| 508 case ElementKind.CONSTRUCTOR: | |
| 509 ConstructorElement constructor = element; | |
| 510 if (constructor.isFactory) { | |
| 511 return new ast.Procedure( | |
| 512 _nameOfMember(constructor), | |
| 513 ast.ProcedureKind.Factory, | |
| 514 scope.buildFunctionInterface(constructor), | |
| 515 isAbstract: false, | |
| 516 isStatic: true, | |
| 517 isExternal: constructor.isExternal, | |
| 518 isConst: constructor.isConst, | |
| 519 fileUri: '${element.source.uri}') | |
| 520 ..fileOffset = element.nameOffset; | |
| 521 } | |
| 522 return new ast.Constructor(scope.buildFunctionInterface(constructor), | |
| 523 name: _nameOfMember(element), | |
| 524 isConst: constructor.isConst, | |
| 525 isExternal: constructor.isExternal) | |
| 526 ..fileOffset = element.nameOffset; | |
| 527 | |
| 528 case ElementKind.FIELD: | |
| 529 case ElementKind.TOP_LEVEL_VARIABLE: | |
| 530 VariableElement variable = element; | |
| 531 return new ast.Field(_nameOfMember(variable), | |
| 532 isStatic: variable.isStatic, | |
| 533 isFinal: variable.isFinal, | |
| 534 isConst: variable.isConst, | |
| 535 type: scope.buildType(variable.type), | |
| 536 fileUri: '${element.source.uri}')..fileOffset = element.nameOffset; | |
| 537 | |
| 538 case ElementKind.METHOD: | |
| 539 case ElementKind.GETTER: | |
| 540 case ElementKind.SETTER: | |
| 541 case ElementKind.FUNCTION: | |
| 542 if (element is FunctionElement && | |
| 543 element.enclosingElement is! CompilationUnitElement) { | |
| 544 throw 'Function $element is nested in ${element.enclosingElement} ' | |
| 545 'and hence is not a member'; | |
| 546 } | |
| 547 ExecutableElement executable = element; | |
| 548 return new ast.Procedure( | |
| 549 _nameOfMember(element), | |
| 550 _procedureKindOf(executable), | |
| 551 scope.buildFunctionInterface(executable), | |
| 552 isAbstract: executable.isAbstract, | |
| 553 isStatic: executable.isStatic, | |
| 554 isExternal: executable.isExternal, | |
| 555 fileUri: '${element.source.uri}')..fileOffset = element.nameOffset; | |
| 556 | |
| 557 default: | |
| 558 throw 'Unexpected member kind: $element'; | |
| 559 } | |
| 560 } | |
| 561 | |
| 562 ast.ProcedureKind _procedureKindOf(ExecutableElement element) { | |
| 563 if (element is PropertyAccessorElement) { | |
| 564 return element.isGetter | |
| 565 ? ast.ProcedureKind.Getter | |
| 566 : ast.ProcedureKind.Setter; | |
| 567 } | |
| 568 if (element is MethodElement) { | |
| 569 if (element.isOperator) return ast.ProcedureKind.Operator; | |
| 570 return ast.ProcedureKind.Method; | |
| 571 } | |
| 572 if (element is FunctionElement) { | |
| 573 return ast.ProcedureKind.Method; | |
| 574 } | |
| 575 if (element is ConstructorElement) { | |
| 576 assert(element.isFactory); | |
| 577 return ast.ProcedureKind.Factory; | |
| 578 } | |
| 579 throw 'Unexpected procedure: $element'; | |
| 580 } | |
| 581 | |
| 582 ast.Name _nameOfMember(Element element) { | |
| 583 // Use 'displayName' to avoid a trailing '=' for setters and 'name' to | |
| 584 // ensure unary minus is called 'unary-'. | |
| 585 String name = | |
| 586 element is PropertyAccessorElement ? element.displayName : element.name; | |
| 587 return new ast.Name(name, getLibraryReference(element.library)); | |
| 588 } | |
| 589 | |
| 590 /// True if the two types have form `C<T1 ... Tm>` and `D<T1 ... Tn>`, and | |
| 591 /// `T1 ... TN` are distinct type variables with no upper bound, where | |
| 592 /// `N = max(m,n)`. | |
| 593 bool areDistinctUnboundTypeVariables( | |
| 594 ast.Supertype first, ast.Supertype second) { | |
| 595 var seen = new Set<ast.TypeParameter>(); | |
| 596 if (first.typeArguments.length < second.typeArguments.length) { | |
| 597 var tmp = first; | |
| 598 first = second; | |
| 599 second = tmp; | |
| 600 } | |
| 601 for (int i = 0; i < first.typeArguments.length; ++i) { | |
| 602 var firstArg = first.typeArguments[i]; | |
| 603 if (!(firstArg is ast.TypeParameterType && | |
| 604 seen.add(firstArg.parameter) && | |
| 605 firstArg.parameter.bound is ast.DynamicType)) { | |
| 606 return false; | |
| 607 } | |
| 608 if (i < second.typeArguments.length && | |
| 609 firstArg != second.typeArguments[i]) { | |
| 610 return false; | |
| 611 } | |
| 612 } | |
| 613 return true; | |
| 614 } | |
| 615 | |
| 616 /// Returns the canonical mixin application of two classes, instantiated with | |
| 617 /// the same list of unbound type variables. | |
| 618 /// | |
| 619 /// Given two classes: | |
| 620 /// class C<C1 ... Cm> | |
| 621 /// class D<D1 ... Dn> | |
| 622 /// | |
| 623 /// This creates or reuses a mixin application class in the library of form: | |
| 624 /// | |
| 625 /// abstract class C&D<T1 ... TN> = C<T1 ... Tm> with D<T1 ... Tn> | |
| 626 /// | |
| 627 /// where `N = max(m,n)`. | |
| 628 /// | |
| 629 /// Such a class can in general contain type errors due to incompatible | |
| 630 /// inheritance from `C` and `D`. This method therefore should only be called | |
| 631 /// if a mixin application `C<S1 ... Sm> with D<S1 ... Sn>` is seen, where | |
| 632 /// `S1 ... SN` are distinct, unbound type variables. | |
| 633 ast.Class getSharedMixinApplicationClass( | |
| 634 ast.Library library, ast.Class superclass, ast.Class mixedInClass) { | |
| 635 // TODO(asgerf): Avoid potential name clash due to associativity. | |
| 636 // As it is, these mixins get the same name: | |
| 637 // (A with B) with C | |
| 638 // A with (B with C) | |
| 639 String name = '${superclass.name}&${mixedInClass.name}'; | |
| 640 return _mixinApplications | |
| 641 .putIfAbsent(library, () => <String, ast.Class>{}) | |
| 642 .putIfAbsent(name, () { | |
| 643 var fresh = | |
| 644 superclass.typeParameters.length >= mixedInClass.typeParameters.length | |
| 645 ? getFreshTypeParameters(superclass.typeParameters) | |
| 646 : getFreshTypeParameters(mixedInClass.typeParameters); | |
| 647 var typeArguments = | |
| 648 fresh.freshTypeParameters.map(makeTypeParameterType).toList(); | |
| 649 var superArgs = typeArguments.length != superclass.typeParameters.length | |
| 650 ? typeArguments.sublist(0, superclass.typeParameters.length) | |
| 651 : typeArguments; | |
| 652 var mixinArgs = typeArguments.length != mixedInClass.typeParameters.length | |
| 653 ? typeArguments.sublist(0, mixedInClass.typeParameters.length) | |
| 654 : typeArguments; | |
| 655 var result = new ast.Class( | |
| 656 name: name, | |
| 657 isAbstract: true, | |
| 658 typeParameters: fresh.freshTypeParameters, | |
| 659 supertype: new ast.Supertype(superclass, superArgs), | |
| 660 mixedInType: new ast.Supertype(mixedInClass, mixinArgs), | |
| 661 fileUri: library.fileUri); | |
| 662 result.level = ast.ClassLevel.Type; | |
| 663 library.addClass(result); | |
| 664 return result; | |
| 665 }); | |
| 666 } | |
| 667 | |
| 668 String formatErrorMessage( | |
| 669 AnalysisError error, String filename, LineInfo lines) { | |
| 670 var location = lines.getLocation(error.offset); | |
| 671 return '[error] ${error.message} ($filename, ' | |
| 672 'line ${location.lineNumber}, ' | |
| 673 'col ${location.columnNumber})'; | |
| 674 } | |
| 675 | |
| 676 void ensureLibraryIsLoaded(ast.Library node) { | |
| 677 _ensureLibraryIsLoaded(node); | |
| 678 _iterateMixinLibraryWorklist(); | |
| 679 } | |
| 680 | |
| 681 void _ensureLibraryIsLoaded(ast.Library node) { | |
| 682 if (!node.isExternal) return; | |
| 683 node.isExternal = false; | |
| 684 var source = context.sourceFactory | |
| 685 .forUri2(applicationRoot.absoluteUri(node.importUri)); | |
| 686 assert(source != null); | |
| 687 var element = context.computeLibraryElement(source); | |
| 688 var units = <CompilationUnit>[]; | |
| 689 bool reportErrors = node.importUri.scheme != 'dart'; | |
| 690 var tree = context.resolveCompilationUnit(source, element); | |
| 691 units.add(tree); | |
| 692 if (reportErrors) _processErrors(source); | |
| 693 for (var part in element.parts) { | |
| 694 var source = part.source; | |
| 695 units.add(context.resolveCompilationUnit(source, element)); | |
| 696 if (reportErrors) _processErrors(source); | |
| 697 } | |
| 698 _buildLibraryBody(element, node, units); | |
| 699 } | |
| 700 | |
| 701 void _processErrors(Source source) { | |
| 702 LineInfo lines; | |
| 703 for (var error in context.computeErrors(source)) { | |
| 704 if (error.errorCode is CompileTimeErrorCode || | |
| 705 error.errorCode is ParserErrorCode || | |
| 706 error.errorCode is ScannerErrorCode || | |
| 707 error.errorCode is StrongModeCode) { | |
| 708 lines ??= context.computeLineInfo(source); | |
| 709 errors.add(formatErrorMessage(error, source.shortName, lines)); | |
| 710 } | |
| 711 } | |
| 712 } | |
| 713 | |
| 714 void loadSdkInterface(ast.Program program, Target target) { | |
| 715 var requiredSdkMembers = target.requiredSdkClasses; | |
| 716 for (var libraryUri in requiredSdkMembers.keys) { | |
| 717 var source = context.sourceFactory.forUri2(Uri.parse(libraryUri)); | |
| 718 var libraryElement = context.computeLibraryElement(source); | |
| 719 for (var member in requiredSdkMembers[libraryUri]) { | |
| 720 var type = libraryElement.getType(member); | |
| 721 if (type == null) { | |
| 722 throw 'Could not find $member in $libraryUri'; | |
| 723 } | |
| 724 promoteToTypeLevel(getClassReference(type)); | |
| 725 } | |
| 726 } | |
| 727 _iterateTemporaryClassWorklist(); | |
| 728 _iterateMixinLibraryWorklist(); | |
| 729 } | |
| 730 | |
| 731 void loadEverything({Target target, bool compileSdk}) { | |
| 732 compileSdk ??= true; | |
| 733 if (compileSdk) { | |
| 734 ensureLibraryIsLoaded(getLibraryReference(getDartCoreLibrary())); | |
| 735 if (target != null) { | |
| 736 for (var uri in target.extraRequiredLibraries) { | |
| 737 var library = _findLibraryElement(uri); | |
| 738 if (library == null) { | |
| 739 errors.add('Could not find required library $uri'); | |
| 740 continue; | |
| 741 } | |
| 742 ensureLibraryIsLoaded(getLibraryReference(library)); | |
| 743 } | |
| 744 } | |
| 745 } | |
| 746 for (int i = 0; i < program.libraries.length; ++i) { | |
| 747 var library = program.libraries[i]; | |
| 748 if (compileSdk || library.importUri.scheme != 'dart') { | |
| 749 ensureLibraryIsLoaded(library); | |
| 750 } | |
| 751 } | |
| 752 } | |
| 753 | |
| 754 /// Builds a list of sources that have been loaded. | |
| 755 /// | |
| 756 /// This operation may be expensive and should only be used for diagnostics. | |
| 757 List<String> getLoadedFileNames() { | |
| 758 var list = <String>[]; | |
| 759 for (var library in program.libraries) { | |
| 760 LibraryElement element = context.computeLibraryElement(context | |
| 761 .sourceFactory | |
| 762 .forUri2(applicationRoot.absoluteUri(library.importUri))); | |
| 763 for (var unit in element.units) { | |
| 764 list.add(unit.source.fullName); | |
| 765 } | |
| 766 } | |
| 767 return list; | |
| 768 } | |
| 769 | |
| 770 void _iterateTemporaryClassWorklist() { | |
| 771 while (temporaryClassWorklist.isNotEmpty) { | |
| 772 var element = temporaryClassWorklist.removeLast(); | |
| 773 promoteToTypeLevel(element); | |
| 774 } | |
| 775 } | |
| 776 | |
| 777 void _iterateMixinLibraryWorklist() { | |
| 778 // The worklist groups classes in the same library together so that we | |
| 779 // request resolved ASTs for each library only once. | |
| 780 while (mixinLibraryWorklist.isNotEmpty) { | |
| 781 LibraryElement library = mixinLibraryWorklist.keys.first; | |
| 782 _libraryBeingLoaded = library; | |
| 783 List<ClassElement> classes = mixinLibraryWorklist.remove(library); | |
| 784 for (var class_ in classes) { | |
| 785 var classNode = getClassReference(class_); | |
| 786 promoteToMixinLevel(classNode, class_, class_.computeNode()); | |
| 787 } | |
| 788 _libraryBeingLoaded = null; | |
| 789 } | |
| 790 _iterateTemporaryClassWorklist(); | |
| 791 } | |
| 792 | |
| 793 ast.Procedure _getMainMethod(Uri uri) { | |
| 794 Source source = context.sourceFactory.forUri2(uri); | |
| 795 LibraryElement library = context.computeLibraryElement(source); | |
| 796 var mainElement = library.entryPoint; | |
| 797 if (mainElement == null) return null; | |
| 798 var mainMember = getMemberReference(mainElement); | |
| 799 if (mainMember is ast.Procedure && !mainMember.isAccessor) { | |
| 800 return mainMember; | |
| 801 } | |
| 802 // Top-level 'main' getters are not supported at the moment. | |
| 803 return null; | |
| 804 } | |
| 805 | |
| 806 ast.Procedure _makeMissingMainMethod(ast.Library library) { | |
| 807 var main = new ast.Procedure( | |
| 808 new ast.Name('main'), | |
| 809 ast.ProcedureKind.Method, | |
| 810 new ast.FunctionNode(new ast.ExpressionStatement(new ast.Throw( | |
| 811 new ast.StringLiteral('Program has no main method')))), | |
| 812 isStatic: true)..fileUri = library.fileUri; | |
| 813 library.addMember(main); | |
| 814 return main; | |
| 815 } | |
| 816 | |
| 817 void loadProgram(Uri mainLibrary, {Target target, bool compileSdk}) { | |
| 818 ast.Library library = getLibraryReferenceFromUri(mainLibrary); | |
| 819 ensureLibraryIsLoaded(library); | |
| 820 var mainMethod = _getMainMethod(mainLibrary); | |
| 821 loadEverything(target: target, compileSdk: compileSdk); | |
| 822 if (mainMethod == null) { | |
| 823 mainMethod = _makeMissingMainMethod(library); | |
| 824 } | |
| 825 program.mainMethod = mainMethod; | |
| 826 for (LibraryElement libraryElement in libraryElements) { | |
| 827 for (CompilationUnitElement compilationUnitElement | |
| 828 in libraryElement.units) { | |
| 829 var source = compilationUnitElement.source; | |
| 830 LineInfo lineInfo = context.computeLineInfo(source); | |
| 831 List<int> sourceCode; | |
| 832 try { | |
| 833 sourceCode = | |
| 834 const Utf8Encoder().convert(context.getContents(source).data); | |
| 835 } catch (e) { | |
| 836 // The source's contents could not be accessed. | |
| 837 sourceCode = const <int>[]; | |
| 838 } | |
| 839 program.uriToSource['${source.uri}'] = | |
| 840 new ast.Source(lineInfo.lineStarts, sourceCode); | |
| 841 } | |
| 842 } | |
| 843 } | |
| 844 | |
| 845 ast.Library loadLibrary(Uri uri) { | |
| 846 ast.Library library = getLibraryReferenceFromUri(uri); | |
| 847 ensureLibraryIsLoaded(library); | |
| 848 return library; | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 class Bimap<K, V> { | |
| 853 final Map<K, V> nodeMap = <K, V>{}; | |
| 854 final Map<V, K> inverse = <V, K>{}; | |
| 855 | |
| 856 bool containsKey(K key) => nodeMap.containsKey(key); | |
| 857 | |
| 858 V operator [](K key) => nodeMap[key]; | |
| 859 | |
| 860 void operator []=(K key, V value) { | |
| 861 assert(!nodeMap.containsKey(key)); | |
| 862 nodeMap[key] = value; | |
| 863 inverse[value] = key; | |
| 864 } | |
| 865 } | |
| 866 | |
| 867 /// Creates [DartLoader]s for a given configuration, while reusing the | |
| 868 /// [DartSdk] and [Packages] object if possible. | |
| 869 class DartLoaderBatch { | |
| 870 Packages packages; | |
| 871 DartSdk dartSdk; | |
| 872 | |
| 873 String lastSdk; | |
| 874 String lastPackagePath; | |
| 875 bool lastStrongMode; | |
| 876 | |
| 877 Future<DartLoader> getLoader(ast.Program program, DartOptions options, | |
| 878 {String packageDiscoveryPath}) async { | |
| 879 if (dartSdk == null || | |
| 880 lastSdk != options.sdk || | |
| 881 lastStrongMode != options.strongMode) { | |
| 882 lastSdk = options.sdk; | |
| 883 lastStrongMode = options.strongMode; | |
| 884 dartSdk = createDartSdk(options.sdk, strongMode: options.strongModeSdk); | |
| 885 } | |
| 886 if (packages == null || | |
| 887 lastPackagePath != options.packagePath || | |
| 888 packageDiscoveryPath != null) { | |
| 889 lastPackagePath = options.packagePath; | |
| 890 packages = await createPackages(options.packagePath, | |
| 891 discoveryPath: packageDiscoveryPath); | |
| 892 } | |
| 893 return new DartLoader(program, options, packages, dartSdk: dartSdk); | |
| 894 } | |
| 895 } | |
| 896 | |
| 897 Future<Packages> createPackages(String packagePath, | |
| 898 {String discoveryPath}) async { | |
| 899 if (packagePath != null) { | |
| 900 var absolutePath = new io.File(packagePath).absolute.path; | |
| 901 if (await new io.Directory(packagePath).exists()) { | |
| 902 return getPackagesDirectory(new Uri.file(absolutePath)); | |
| 903 } else if (await new io.File(packagePath).exists()) { | |
| 904 return loadPackagesFile(new Uri.file(absolutePath)); | |
| 905 } else { | |
| 906 throw 'Packages not found: $packagePath'; | |
| 907 } | |
| 908 } | |
| 909 if (discoveryPath != null) { | |
| 910 return findPackagesFromFile(Uri.parse(discoveryPath)); | |
| 911 } | |
| 912 return Packages.noPackages; | |
| 913 } | |
| 914 | |
| 915 AnalysisOptions createAnalysisOptions(bool strongMode) { | |
| 916 return new AnalysisOptionsImpl() | |
| 917 ..strongMode = strongMode | |
| 918 ..generateImplicitErrors = false | |
| 919 ..generateSdkErrors = false | |
| 920 ..preserveComments = false | |
| 921 ..hint = false | |
| 922 ..enableSuperMixins = true; | |
| 923 } | |
| 924 | |
| 925 DartSdk createDartSdk(String path, {bool strongMode, bool isSummary}) { | |
| 926 if (isSummary ?? false) { | |
| 927 return new SummaryBasedDartSdk(path, strongMode); | |
| 928 } | |
| 929 var resources = PhysicalResourceProvider.INSTANCE; | |
| 930 return new FolderBasedDartSdk(resources, resources.getFolder(path)) | |
| 931 ..context | |
| 932 .analysisOptions | |
| 933 .setCrossContextOptionsFrom(createAnalysisOptions(strongMode)); | |
| 934 } | |
| 935 | |
| 936 class CustomUriResolver extends UriResolver { | |
| 937 final ResourceUriResolver _resourceUriResolver; | |
| 938 final Map<Uri, Uri> _customUrlMappings; | |
| 939 | |
| 940 CustomUriResolver(this._resourceUriResolver, this._customUrlMappings); | |
| 941 | |
| 942 Source resolveAbsolute(Uri uri, [Uri actualUri]) { | |
| 943 // TODO(kustermann): Once dartk supports configurable imports we should be | |
| 944 // able to get rid of this. | |
| 945 if (uri.toString() == 'package:mojo/src/internal_contract.dart') { | |
| 946 uri = actualUri = Uri.parse('dart:mojo.internal'); | |
| 947 } | |
| 948 | |
| 949 Uri baseUri = uri; | |
| 950 String relative; | |
| 951 String path = uri.path; | |
| 952 int index = path.indexOf('/'); | |
| 953 if (index > 0) { | |
| 954 baseUri = uri.replace(path: path.substring(0, index)); | |
| 955 relative = path.substring(index + 1); | |
| 956 } | |
| 957 Uri baseMapped = _customUrlMappings[baseUri]; | |
| 958 if (baseMapped == null) return null; | |
| 959 | |
| 960 Uri mapped = relative != null ? baseMapped.resolve(relative) : baseMapped; | |
| 961 return _resourceUriResolver.resolveAbsolute(mapped, actualUri); | |
| 962 } | |
| 963 | |
| 964 Uri restoreAbsolute(Source source) { | |
| 965 return _resourceUriResolver.restoreAbsolute(source); | |
| 966 } | |
| 967 } | |
| 968 | |
| 969 AnalysisContext createContext(DartOptions options, Packages packages, | |
| 970 {DartSdk dartSdk}) { | |
| 971 bool fromSummary = options.sdkSummary != null; | |
| 972 dartSdk ??= createDartSdk(fromSummary ? options.sdkSummary : options.sdk, | |
| 973 strongMode: options.strongModeSdk, isSummary: fromSummary); | |
| 974 | |
| 975 var resourceProvider = PhysicalResourceProvider.INSTANCE; | |
| 976 var resourceUriResolver = new ResourceUriResolver(resourceProvider); | |
| 977 List<UriResolver> resolvers = []; | |
| 978 var customUriMappings = options.customUriMappings; | |
| 979 if (customUriMappings != null && customUriMappings.length > 0) { | |
| 980 resolvers | |
| 981 .add(new CustomUriResolver(resourceUriResolver, customUriMappings)); | |
| 982 } | |
| 983 resolvers.add(new DartUriResolver(dartSdk)); | |
| 984 resolvers.add(resourceUriResolver); | |
| 985 | |
| 986 if (packages != null) { | |
| 987 var folderMap = <String, List<Folder>>{}; | |
| 988 packages.asMap().forEach((String packagePath, Uri uri) { | |
| 989 String path = resourceProvider.pathContext.fromUri(uri); | |
| 990 folderMap[packagePath] = [resourceProvider.getFolder(path)]; | |
| 991 }); | |
| 992 resolvers.add(new PackageMapUriResolver(resourceProvider, folderMap)); | |
| 993 } | |
| 994 | |
| 995 AnalysisContext context = AnalysisEngine.instance.createAnalysisContext() | |
| 996 ..sourceFactory = new SourceFactory(resolvers) | |
| 997 ..analysisOptions = createAnalysisOptions(options.strongMode); | |
| 998 | |
| 999 options.declaredVariables.forEach((String name, String value) { | |
| 1000 context.declaredVariables.define(name, value); | |
| 1001 }); | |
| 1002 | |
| 1003 return context; | |
| 1004 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2756593004:
Start unraveling circularities between analyzer and front_end/kernel. (Closed)
