| // Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'package:analyzer/dart/element/element.dart'; |
| import 'package:analyzer/dart/element/nullability_suffix.dart'; |
| import 'package:analyzer/dart/element/type.dart'; |
| import 'package:analyzer/dart/element/type_provider.dart'; |
| import 'package:analyzer/src/dart/constant/value.dart'; |
| import 'package:analyzer/src/dart/element/type.dart'; |
| import 'package:analyzer/src/generated/type_system.dart'; |
| import 'package:meta/meta.dart'; |
| |
| /// Provide common functionality shared by the various TypeProvider |
| /// implementations. |
| abstract class TypeProviderBase implements TypeProvider { |
| @override |
| List<InterfaceType> get nonSubtypableTypes => <InterfaceType>[ |
| boolType, |
| doubleType, |
| intType, |
| nullType, |
| numType, |
| stringType |
| ]; |
| |
| @override |
| bool isObjectGetter(String id) { |
| PropertyAccessorElement element = objectType.element.getGetter(id); |
| return (element != null && !element.isStatic); |
| } |
| |
| @override |
| bool isObjectMember(String id) { |
| return isObjectGetter(id) || isObjectMethod(id); |
| } |
| |
| @override |
| bool isObjectMethod(String id) { |
| MethodElement element = objectType.element.getMethod(id); |
| return (element != null && !element.isStatic); |
| } |
| } |
| |
| class TypeProviderImpl extends TypeProviderBase { |
| final LibraryElement _coreLibrary; |
| final LibraryElement _asyncLibrary; |
| |
| /// If `true`, then NNBD types are returned. |
| /// If `false`, then legacy types are returned. |
| final bool isNonNullableByDefault; |
| |
| ClassElement _boolElement; |
| ClassElement _doubleElement; |
| ClassElement _futureElement; |
| ClassElement _futureOrElement; |
| ClassElement _intElement; |
| ClassElement _iterableElement; |
| ClassElement _listElement; |
| ClassElement _mapElement; |
| ClassElement _nullElement; |
| ClassElement _numElement; |
| ClassElement _objectElement; |
| ClassElement _setElement; |
| ClassElement _streamElement; |
| ClassElement _stringElement; |
| ClassElement _symbolElement; |
| |
| InterfaceType _boolType; |
| InterfaceType _deprecatedType; |
| InterfaceType _doubleType; |
| InterfaceType _functionType; |
| InterfaceType _futureDynamicType; |
| InterfaceType _futureNullType; |
| InterfaceType _futureOrNullType; |
| InterfaceType _futureOrType; |
| InterfaceType _futureType; |
| InterfaceType _intType; |
| InterfaceType _iterableDynamicType; |
| InterfaceType _iterableObjectType; |
| InterfaceType _iterableType; |
| InterfaceType _listType; |
| InterfaceType _mapType; |
| InterfaceType _mapObjectObjectType; |
| DartObjectImpl _nullObject; |
| InterfaceType _nullType; |
| InterfaceType _numType; |
| InterfaceType _objectType; |
| InterfaceType _setType; |
| InterfaceType _stackTraceType; |
| InterfaceType _streamDynamicType; |
| InterfaceType _streamType; |
| InterfaceType _stringType; |
| InterfaceType _symbolType; |
| InterfaceType _typeType; |
| |
| InterfaceTypeImpl _nullStar; |
| |
| InterfaceType _iterableForSetMapDisambiguation; |
| InterfaceType _mapForSetMapDisambiguation; |
| |
| Set<ClassElement> _nonSubtypableClasses; |
| |
| /// Initialize a newly created type provider to provide the types defined in |
| /// the given [coreLibrary] and [asyncLibrary]. |
| TypeProviderImpl({ |
| @required LibraryElement coreLibrary, |
| @required LibraryElement asyncLibrary, |
| @required bool isNonNullableByDefault, |
| }) : _coreLibrary = coreLibrary, |
| _asyncLibrary = asyncLibrary, |
| isNonNullableByDefault = isNonNullableByDefault; |
| |
| TypeProviderImpl get asLegacy { |
| if (isNonNullableByDefault) { |
| return TypeProviderImpl( |
| coreLibrary: _coreLibrary, |
| asyncLibrary: _asyncLibrary, |
| isNonNullableByDefault: false, |
| ); |
| } else { |
| return this; |
| } |
| } |
| |
| TypeProviderImpl get asNonNullableByDefault { |
| if (isNonNullableByDefault) { |
| return this; |
| } else { |
| return TypeProviderImpl( |
| coreLibrary: _coreLibrary, |
| asyncLibrary: _asyncLibrary, |
| isNonNullableByDefault: true, |
| ); |
| } |
| } |
| |
| @override |
| ClassElement get boolElement { |
| return _boolElement ??= _getClassElement(_coreLibrary, 'bool'); |
| } |
| |
| @override |
| InterfaceType get boolType { |
| _boolType ??= _getType(_coreLibrary, "bool"); |
| return _boolType; |
| } |
| |
| @override |
| DartType get bottomType { |
| if (isNonNullableByDefault) { |
| return NeverTypeImpl.instance; |
| } |
| return NeverTypeImpl.instanceLegacy; |
| } |
| |
| @override |
| InterfaceType get deprecatedType { |
| _deprecatedType ??= _getType(_coreLibrary, "Deprecated"); |
| return _deprecatedType; |
| } |
| |
| @override |
| ClassElement get doubleElement { |
| return _doubleElement ??= _getClassElement(_coreLibrary, "double"); |
| } |
| |
| @override |
| InterfaceType get doubleType { |
| _doubleType ??= _getType(_coreLibrary, "double"); |
| return _doubleType; |
| } |
| |
| @override |
| DartType get dynamicType => DynamicTypeImpl.instance; |
| |
| @override |
| InterfaceType get functionType { |
| _functionType ??= _getType(_coreLibrary, "Function"); |
| return _functionType; |
| } |
| |
| @override |
| InterfaceType get futureDynamicType { |
| _futureDynamicType ??= InterfaceTypeImpl( |
| element: futureElement, |
| typeArguments: [dynamicType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _futureDynamicType; |
| } |
| |
| @override |
| ClassElement get futureElement { |
| return _futureElement ??= _getClassElement(_asyncLibrary, 'Future'); |
| } |
| |
| @override |
| InterfaceType get futureNullType { |
| _futureNullType ??= InterfaceTypeImpl( |
| element: futureElement, |
| typeArguments: [nullType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _futureNullType; |
| } |
| |
| @override |
| ClassElement get futureOrElement { |
| return _futureOrElement ??= _getClassElement(_asyncLibrary, 'FutureOr'); |
| } |
| |
| @override |
| InterfaceType get futureOrNullType { |
| _futureOrNullType ??= InterfaceTypeImpl( |
| element: futureOrElement, |
| typeArguments: [nullType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _futureOrNullType; |
| } |
| |
| @override |
| InterfaceType get futureOrType { |
| _futureOrType ??= _getType(_asyncLibrary, "FutureOr"); |
| return _futureOrType; |
| } |
| |
| @override |
| InterfaceType get futureType { |
| _futureType ??= _getType(_asyncLibrary, "Future"); |
| return _futureType; |
| } |
| |
| @override |
| ClassElement get intElement { |
| return _intElement ??= _getClassElement(_coreLibrary, "int"); |
| } |
| |
| @override |
| InterfaceType get intType { |
| _intType ??= _getType(_coreLibrary, "int"); |
| return _intType; |
| } |
| |
| @override |
| InterfaceType get iterableDynamicType { |
| _iterableDynamicType ??= InterfaceTypeImpl( |
| element: iterableElement, |
| typeArguments: [dynamicType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _iterableDynamicType; |
| } |
| |
| @override |
| ClassElement get iterableElement { |
| return _iterableElement ??= _getClassElement(_coreLibrary, 'Iterable'); |
| } |
| |
| /// Return the type that should be used during disambiguation between `Set` |
| /// and `Map` literals. If NNBD enabled, use `Iterable<Object?, Object?>`, |
| /// otherwise use `Iterable<Object*, Object*>*`. |
| InterfaceType get iterableForSetMapDisambiguation { |
| if (_iterableForSetMapDisambiguation == null) { |
| var objectType = objectElement.instantiate( |
| typeArguments: const [], |
| nullabilitySuffix: _questionOrStarSuffix, |
| ); |
| _iterableForSetMapDisambiguation = iterableElement.instantiate( |
| typeArguments: [ |
| objectType, |
| ], |
| nullabilitySuffix: _questionOrStarSuffix, |
| ); |
| } |
| return _iterableForSetMapDisambiguation; |
| } |
| |
| @override |
| InterfaceType get iterableObjectType { |
| _iterableObjectType ??= InterfaceTypeImpl( |
| element: iterableElement, |
| typeArguments: [objectType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _iterableObjectType; |
| } |
| |
| @override |
| InterfaceType get iterableType { |
| _iterableType ??= _getType(_coreLibrary, "Iterable"); |
| return _iterableType; |
| } |
| |
| @override |
| ClassElement get listElement { |
| return _listElement ??= _getClassElement(_coreLibrary, 'List'); |
| } |
| |
| @override |
| InterfaceType get listType { |
| _listType ??= _getType(_coreLibrary, "List"); |
| return _listType; |
| } |
| |
| @override |
| ClassElement get mapElement { |
| return _mapElement ??= _getClassElement(_coreLibrary, 'Map'); |
| } |
| |
| /// Return the type that should be used during disambiguation between `Set` |
| /// and `Map` literals. If NNBD enabled, use `Map<Object?, Object?>`, |
| /// otherwise use `Map<Object*, Object*>*`. |
| InterfaceType get mapForSetMapDisambiguation { |
| if (_mapForSetMapDisambiguation == null) { |
| var objectType = objectElement.instantiate( |
| typeArguments: const [], |
| nullabilitySuffix: _questionOrStarSuffix, |
| ); |
| _mapForSetMapDisambiguation = mapElement.instantiate( |
| typeArguments: [ |
| objectType, |
| objectType, |
| ], |
| nullabilitySuffix: _questionOrStarSuffix, |
| ); |
| } |
| return _mapForSetMapDisambiguation; |
| } |
| |
| @override |
| InterfaceType get mapObjectObjectType { |
| _mapObjectObjectType ??= InterfaceTypeImpl( |
| element: mapElement, |
| typeArguments: [objectType, objectType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _mapObjectObjectType; |
| } |
| |
| @override |
| InterfaceType get mapType { |
| _mapType ??= _getType(_coreLibrary, "Map"); |
| return _mapType; |
| } |
| |
| @override |
| DartType get neverType => NeverTypeImpl.instance; |
| |
| @override |
| Set<ClassElement> get nonSubtypableClasses => _nonSubtypableClasses ??= { |
| boolElement, |
| doubleElement, |
| futureOrElement, |
| intElement, |
| nullElement, |
| numElement, |
| stringElement, |
| }; |
| |
| @override |
| ClassElement get nullElement { |
| return _nullElement ??= _getClassElement(_coreLibrary, 'Null'); |
| } |
| |
| @deprecated |
| @override |
| DartObjectImpl get nullObject { |
| if (_nullObject == null) { |
| _nullObject = DartObjectImpl( |
| TypeSystemImpl( |
| implicitCasts: false, |
| isNonNullableByDefault: false, |
| strictInference: false, |
| typeProvider: this, |
| ), |
| nullType, |
| NullState.NULL_STATE, |
| ); |
| } |
| return _nullObject; |
| } |
| |
| InterfaceTypeImpl get nullStar { |
| return _nullStar ??= nullElement.instantiate( |
| typeArguments: const [], |
| nullabilitySuffix: NullabilitySuffix.star, |
| ); |
| } |
| |
| @override |
| InterfaceType get nullType { |
| _nullType ??= _getType(_coreLibrary, "Null"); |
| return _nullType; |
| } |
| |
| @override |
| ClassElement get numElement { |
| return _numElement ??= _getClassElement(_coreLibrary, 'num'); |
| } |
| |
| @override |
| InterfaceType get numType { |
| _numType ??= _getType(_coreLibrary, "num"); |
| return _numType; |
| } |
| |
| ClassElement get objectElement { |
| return _objectElement ??= _getClassElement(_coreLibrary, 'Object'); |
| } |
| |
| @override |
| InterfaceType get objectType { |
| _objectType ??= _getType(_coreLibrary, "Object"); |
| return _objectType; |
| } |
| |
| @override |
| ClassElement get setElement { |
| return _setElement ??= _getClassElement(_coreLibrary, 'Set'); |
| } |
| |
| @override |
| InterfaceType get setType { |
| return _setType ??= _getType(_coreLibrary, "Set"); |
| } |
| |
| @override |
| InterfaceType get stackTraceType { |
| _stackTraceType ??= _getType(_coreLibrary, "StackTrace"); |
| return _stackTraceType; |
| } |
| |
| @override |
| InterfaceType get streamDynamicType { |
| _streamDynamicType ??= InterfaceTypeImpl( |
| element: streamElement, |
| typeArguments: [dynamicType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| return _streamDynamicType; |
| } |
| |
| @override |
| ClassElement get streamElement { |
| return _streamElement ??= _getClassElement(_asyncLibrary, 'Stream'); |
| } |
| |
| @override |
| InterfaceType get streamType { |
| _streamType ??= _getType(_asyncLibrary, "Stream"); |
| return _streamType; |
| } |
| |
| @override |
| ClassElement get stringElement { |
| return _stringElement ??= _getClassElement(_coreLibrary, 'String'); |
| } |
| |
| @override |
| InterfaceType get stringType { |
| _stringType ??= _getType(_coreLibrary, "String"); |
| return _stringType; |
| } |
| |
| @override |
| ClassElement get symbolElement { |
| return _symbolElement ??= _getClassElement(_coreLibrary, 'Symbol'); |
| } |
| |
| @override |
| InterfaceType get symbolType { |
| _symbolType ??= _getType(_coreLibrary, "Symbol"); |
| return _symbolType; |
| } |
| |
| @override |
| InterfaceType get typeType { |
| _typeType ??= _getType(_coreLibrary, "Type"); |
| return _typeType; |
| } |
| |
| @override |
| VoidType get voidType => VoidTypeImpl.instance; |
| |
| NullabilitySuffix get _nullabilitySuffix { |
| if (isNonNullableByDefault) { |
| return NullabilitySuffix.none; |
| } else { |
| return NullabilitySuffix.star; |
| } |
| } |
| |
| NullabilitySuffix get _questionOrStarSuffix { |
| return isNonNullableByDefault |
| ? NullabilitySuffix.question |
| : NullabilitySuffix.star; |
| } |
| |
| @override |
| InterfaceType futureOrType2(DartType valueType) { |
| return futureOrElement.instantiate( |
| typeArguments: [valueType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType futureType2(DartType valueType) { |
| return futureElement.instantiate( |
| typeArguments: [valueType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType iterableType2(DartType elementType) { |
| return iterableElement.instantiate( |
| typeArguments: [elementType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType listType2(DartType elementType) { |
| return listElement.instantiate( |
| typeArguments: [elementType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType mapType2(DartType keyType, DartType valueType) { |
| return mapElement.instantiate( |
| typeArguments: [keyType, valueType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType setType2(DartType elementType) { |
| return setElement.instantiate( |
| typeArguments: [elementType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| @override |
| InterfaceType streamType2(DartType elementType) { |
| return streamElement.instantiate( |
| typeArguments: [elementType], |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| |
| /// Return the class with the given [name] from the given [library], or |
| /// throw a [StateError] if there is no class with the given name. |
| ClassElement _getClassElement(LibraryElement library, String name) { |
| var element = library.getType(name); |
| if (element == null) { |
| throw StateError('No definition of type $name'); |
| } |
| return element; |
| } |
| |
| /// Return the type with the given [name] from the given [library], or |
| /// throw a [StateError] if there is no class with the given name. |
| InterfaceType _getType(LibraryElement library, String name) { |
| var element = _getClassElement(library, name); |
| |
| var typeArguments = const <DartType>[]; |
| var typeParameters = element.typeParameters; |
| if (typeParameters.isNotEmpty) { |
| typeArguments = typeParameters.map((e) { |
| return TypeParameterTypeImpl( |
| element: e, |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| }).toList(growable: false); |
| } |
| |
| return InterfaceTypeImpl( |
| element: element, |
| typeArguments: typeArguments, |
| nullabilitySuffix: _nullabilitySuffix, |
| ); |
| } |
| } |