| /******************************************************************************* |
| * Copyright (c) 2006, 2008 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.internal.core.dom.lrparser.symboltable; |
| |
| /** |
| * A facade for a FunctionalMap that is used just to track typedef |
| * declarations. |
| * |
| * This class acts like a set. No information needs to be associated |
| * with a typedef declaration, all we need to know is if the identifier |
| * has been declared as a typedef. |
| * |
| * @author Mike Kucera |
| */ |
| public class TypedefSymbolTable { |
| |
| /** |
| * Start with EMPTY_TABLE and build up a symbol table using add(). |
| */ |
| public static final TypedefSymbolTable EMPTY_TABLE = new TypedefSymbolTable(); |
| |
| // the map we are providing a facade for |
| private final FunctionalMap<String, Object> map; |
| |
| /** |
| * Constructors are private, start with EMPTY_TABLE |
| * and build it up using insert(). |
| */ |
| private TypedefSymbolTable() { |
| map = FunctionalMap.emptyMap(); |
| } |
| |
| private TypedefSymbolTable(FunctionalMap<String, Object> newRoot) { |
| map = newRoot; |
| } |
| |
| public TypedefSymbolTable add(String typedefIdent) { |
| return new TypedefSymbolTable(map.insert(typedefIdent, null)); |
| } |
| |
| public boolean contains(String typedef) { |
| return map.containsKey(typedef); |
| } |
| |
| public int size() { |
| return map.size(); |
| } |
| |
| public boolean isEmpty() { |
| return map.size() == 0; |
| } |
| |
| @Override |
| public String toString() { |
| return map.toString(); |
| } |
| |
| } |