Remove CompilationUnitElement.getElementAt().

pkg/analyzer/lib/src/dart/element/element.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
-import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
 import 'package:analyzer/src/dart/constant/value.dart';
 import 'package:analyzer/src/dart/element/handle.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/error/codes.dart' show CompileTimeErrorCode;
 import 'package:analyzer/src/generated/constant.dart' show EvaluationResultImpl;
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, AnalysisEngine;
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
@@ skipping 1303 matching lines @@
    * A list containing all of the types contained in this compilation unit.
    */
   List<ClassElement> _types;
 
   /**
    * A list containing all of the variables contained in this compilation unit.
    */
   List<TopLevelVariableElement> _variables;
 
   /**
-   * A map from offsets to elements of this unit at these offsets.
-   */
-  final Map<int, Element> _offsetToElementMap = new HashMap<int, Element>();
-
-  /**
    * Resynthesized explicit top-level property accessors.
    */
   UnitExplicitTopLevelAccessors _explicitTopLevelAccessors;
 
   /**
    * Resynthesized explicit top-level variables.
    */
   UnitExplicitTopLevelVariables _explicitTopLevelVariables;
 
   /**
@@ skipping 253 matching lines @@
   }
 
   @override
   bool operator ==(Object object) =>
       object is CompilationUnitElementImpl && source == object.source;
 
   @override
   T accept<T>(ElementVisitor<T> visitor) =>
       visitor.visitCompilationUnitElement(this);
 
-  /**
-   * This method is invoked after this unit was incrementally resolved.
-   */
-  void afterIncrementalResolution() {
-    _offsetToElementMap.clear();
-  }
-
   @override
   void appendTo(StringBuffer buffer) {
     if (source == null) {
       buffer.write("{compilation unit}");
     } else {
       buffer.write(source.fullName);
     }
   }
 
   @override
@@ skipping 51 matching lines @@
     for (ClassElement type in _enums) {
       EnumElementImpl typeImpl = type;
       if (typeImpl.identifier == identifier) {
         return typeImpl;
       }
     }
     return null;
   }
 
   @override
-  Element getElementAt(int offset) {
-    if (_offsetToElementMap.isEmpty) {
-      accept(new _BuildOffsetToElementMap(_offsetToElementMap));
-    }
-    return _offsetToElementMap[offset];
-  }
-
-  @override
   ClassElement getEnum(String enumName) {
     for (ClassElement enumDeclaration in _enums) {
       if (enumDeclaration.name == enumName) {
         return enumDeclaration;
       }
     }
     return null;
   }
 
   @override
@@ skipping 7349 matching lines @@
 
   @override
   DartObject computeConstantValue() => null;
 
   @override
   void visitChildren(ElementVisitor visitor) {
     super.visitChildren(visitor);
     _initializer?.accept(visitor);
   }
 }
-
-/**
- * A visitor that visit all the elements recursively and fill the given [map].
- */
-class _BuildOffsetToElementMap extends GeneralizingElementVisitor {
-  final Map<int, Element> map;
-
-  _BuildOffsetToElementMap(this.map);
-
-  @override
-  void visitElement(Element element) {
-    int offset = element.nameOffset;
-    if (offset != -1) {
-      map[offset] = element;
-    }
-    super.visitElement(element);
-  }
-}