BackRefNode.java revision 953:221a84ef44c0
126240Swpaul/* 226240Swpaul * Permission is hereby granted, free of charge, to any person obtaining a copy of 350477Speter * this software and associated documentation files (the "Software"), to deal in 426240Swpaul * the Software without restriction, including without limitation the rights to 530908Scharnier * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 630908Scharnier * of the Software, and to permit persons to whom the Software is furnished to do 770022Sru * so, subject to the following conditions: 830908Scharnier * 930908Scharnier * The above copyright notice and this permission notice shall be included in all 1030908Scharnier * copies or substantial portions of the Software. 1130908Scharnier * 1268963Sru * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 1330908Scharnier * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 1495083Scharnier * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 1595083Scharnier * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 1695083Scharnier * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 1726240Swpaul * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 1826240Swpaul * SOFTWARE. 1930908Scharnier */ 2026240Swpaulpackage jdk.nashorn.internal.runtime.regexp.joni.ast; 2130908Scharnier 2230908Scharnierimport jdk.nashorn.internal.runtime.regexp.joni.ScanEnvironment; 2330908Scharnier 2430908Scharnierpublic final class BackRefNode extends StateNode { 2530908Scharnier public final int backRef; 26 27 public BackRefNode(final int backRef, final ScanEnvironment env) { 28 this.backRef = backRef; 29 30 if (backRef <= env.numMem && env.memNodes[backRef] == null) { 31 setRecursion(); /* /...(\1).../ */ 32 } 33 } 34 35 @Override 36 public int getType() { 37 return BREF; 38 } 39 40 @Override 41 public String getName() { 42 return "Back Ref"; 43 } 44 45 @Override 46 public String toString(final int level) { 47 final StringBuilder value = new StringBuilder(super.toString(level)); 48 value.append("\n back: ").append(backRef); 49 return value.toString(); 50 } 51} 52