Mercurial > hg > truffle
view graal/com.oracle.graal.phases/src/com/oracle/graal/phases/LazyName.java @ 21219:a4d68add31f6
Add SSADestructionPhase.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Mon, 20 Apr 2015 16:02:38 +0200 |
parents | f3510d0dcf67 |
children | b1530a6cce8c |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.phases; import com.oracle.graal.debug.*; /** * A name whose {@link String} value is computed only when it is needed. This is useful in * combination with debugging facilities such as {@link Debug#scope(Object)} where the * {@link String} value of a name is only needed if debugging is enabled. */ public abstract class LazyName implements CharSequence { private String value; public int length() { return toString().length(); } public char charAt(int index) { return toString().charAt(index); } public CharSequence subSequence(int start, int end) { return toString().subSequence(start, end); } @Override public final String toString() { if (value == null) { value = createString(); } return value; } /** * Creates the {@link String} value of this name. */ protected abstract String createString(); }