1/* 2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package jdk.nashorn.internal.ir; 27 28/** 29 * Interface implemented by all nodes that have flags in 30 * a lexical context. This is needed as we sometimes have to save 31 * the setting of flags in the lexical context until a block 32 * is completely finished and its final version (after multiple 33 * copy on writes) is placed in the lexical context 34 * 35 * @param <T> lexical context node that can have flags set during code generation 36 */ 37public interface Flags<T extends LexicalContextNode> { 38 39 /** 40 * Get all flags of a LexicalContextNode 41 * @return flags 42 */ 43 public int getFlags(); 44 45 /** 46 * Check if a flag is set in a lexical context node 47 * @param flag flag to check 48 * @return flags 49 */ 50 public boolean getFlag(int flag); 51 52 /** 53 * Clear a flag of a LexicalContextNode 54 * @param lc lexical context 55 * @param flag flag to clear 56 * @return the new LexicalContext node if flags were changed, same otherwise 57 */ 58 public T clearFlag(final LexicalContext lc, int flag); 59 60 /** 61 * Set a flag of a LexicalContextNode 62 * @param lc lexical context 63 * @param flag flag to set 64 * @return the new LexicalContext node if flags were changed, same otherwise 65 */ 66 public T setFlag(final LexicalContext lc, int flag); 67 68 /** 69 * Set all flags of a LexicalContextNode, overwriting previous flags 70 * @param lc lexical context 71 * @param flags new flags value 72 * @return the new LexicalContext node if flags were changed, same otherwise 73 */ 74 public T setFlags(final LexicalContext lc, int flags); 75} 76