| // 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/src/summary2/declaration.dart'; |
| |
| class Scope { |
| final Scope parent; |
| final Map<String, Declaration> map; |
| |
| Scope(this.parent, this.map); |
| |
| Scope.top() : this(null, <String, Declaration>{}); |
| |
| void declare(String name, Declaration declaration) { |
| map[name] = declaration; |
| } |
| |
| void forEach(f(String name, Declaration declaration)) { |
| map.forEach(f); |
| } |
| |
| Declaration lookup(String name) { |
| var declaration = map[name]; |
| if (declaration != null) return declaration; |
| |
| if (parent == null) return null; |
| return parent.lookup(name); |
| } |
| } |