Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/AlwaysValidAssumption.java @ 21522:28cbfacd0518
Merge
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Thu, 28 May 2015 17:44:05 +0200 |
parents | 1c446564d36c |
children |
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/* * Copyright (c) 2013, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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.truffle.api.utilities; import com.oracle.truffle.api.*; import com.oracle.truffle.api.nodes.*; /** * An assumption that is always valid. Used as a placeholder where an assumption is needed but never * invalidated. */ public final class AlwaysValidAssumption implements Assumption { public static final AlwaysValidAssumption INSTANCE = new AlwaysValidAssumption(); private AlwaysValidAssumption() { } @Override public void check() throws InvalidAssumptionException { } @Override public void invalidate() { throw new UnsupportedOperationException("Cannot invalidate this assumption - it is always valid"); } @Override public String getName() { return getClass().getName(); } @Override public boolean isValid() { return true; } }