| // Copyright (c) 2020, 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/ast/ast.dart'; |
| import 'package:analyzer/dart/element/element.dart'; |
| import 'package:analyzer/src/dart/element/extensions.dart'; |
| import 'package:analyzer/src/generated/resolver.dart'; |
| |
| class LexicalLookup { |
| final ResolverVisitor _resolver; |
| |
| LexicalLookup(this._resolver); |
| |
| LexicalLookupResult perform({ |
| required SimpleIdentifier node, |
| required bool setter, |
| }) { |
| var id = node.name; |
| var scopeResult = _resolver.nameScope.lookup(id); |
| var scopeGetter = scopeResult.getter; |
| var scopeSetter = scopeResult.setter; |
| if (scopeGetter != null || scopeSetter != null) { |
| if (scopeGetter is VariableElement) { |
| return LexicalLookupResult(requested: scopeGetter); |
| } |
| if (setter) { |
| if (scopeSetter != null) { |
| return LexicalLookupResult( |
| requested: _resolver.toLegacyElement(scopeSetter), |
| ); |
| } |
| if (scopeGetter != null && !scopeGetter.isInstanceMember) { |
| return LexicalLookupResult( |
| recovery: _resolver.toLegacyElement(scopeGetter), |
| ); |
| } |
| } else { |
| if (scopeGetter != null) { |
| return LexicalLookupResult( |
| requested: _resolver.toLegacyElement(scopeGetter), |
| ); |
| } |
| if (scopeSetter != null && !scopeSetter.isInstanceMember) { |
| return LexicalLookupResult( |
| recovery: _resolver.toLegacyElement(scopeSetter), |
| ); |
| } |
| } |
| } |
| |
| var thisType = _resolver.thisType; |
| if (thisType == null) { |
| var recoveryElement = setter ? scopeGetter : scopeGetter; |
| return LexicalLookupResult( |
| recovery: _resolver.toLegacyElement(recoveryElement), |
| ); |
| } |
| |
| var propertyResult = _resolver.typePropertyResolver.resolve( |
| receiver: null, |
| receiverType: thisType, |
| name: id, |
| propertyErrorEntity: node, |
| nameErrorEntity: node, |
| ); |
| |
| if (setter) { |
| var setterElement = propertyResult.setter; |
| if (setterElement != null) { |
| return LexicalLookupResult( |
| requested: _resolver.toLegacyElement(setterElement), |
| ); |
| } else { |
| var recoveryElement = scopeGetter ?? propertyResult.getter; |
| return LexicalLookupResult( |
| recovery: _resolver.toLegacyElement(recoveryElement), |
| ); |
| } |
| } else { |
| var getterElement = propertyResult.getter; |
| if (getterElement != null) { |
| return LexicalLookupResult( |
| requested: _resolver.toLegacyElement(getterElement), |
| ); |
| } else { |
| var recoveryElement = scopeSetter ?? propertyResult.setter; |
| return LexicalLookupResult( |
| recovery: _resolver.toLegacyElement(recoveryElement), |
| ); |
| } |
| } |
| } |
| } |
| |
| class LexicalLookupResult { |
| final Element? requested; |
| final Element? recovery; |
| |
| LexicalLookupResult({this.requested, this.recovery}); |
| } |