Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api.codegen/src/com/oracle/truffle/api/codegen/TypeSystem.java @ 8884:51a8368d0231
Adapt to changes in hotspot makefiles : pass our JAVA_HOME as ALT_BOOTDIR (so that things are built with a 'safe' jdk) and our jdk copy as JAVA_HOME (so that the jvm gets installed there)
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Sun, 07 Apr 2013 13:30:37 +0200 |
parents | 33e08aca06ff |
children | 8b2573c8d47f |
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/* * Copyright (c) 2012, 2012, 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.truffle.api.codegen; import java.lang.annotation.*; /** * <p> * Annotates a type system class that represents type information for a node. Generates code for * converting and managing types. Methods contained in the type system may be annotated with * {@link TypeCast} or {@link TypeCheck}. These methods alter the default behavior of the type * system. * </p> * * * <b>Example:</b> * <p> * Shows a <code>@TypeSystem</code> definition with three types. In this example BigIntegers can be * also treated as integers if their bit width is less than 32. * </p> * * <pre> * * {@literal @}TypeSystem(types = {int.class, BigInteger.class, String.class}, nodeBaseClass = TypedNode.class) * public abstract class Types { * * {@literal @}TypeCheck * public boolean isInteger(Object value) { * return value instanceof Integer || (value instanceof BigInteger && ((BigInteger) value).bitLength() < Integer.SIZE); * } * * {@literal @}TypeCast * public int asInteger(Object value) { * if (value instanceof Integer) { * return (int) value; * } else { * return ((BigInteger) value).intValue(); * } * } * } * </pre> * * @see TypeCast * @see TypeCheck */ @Retention(RetentionPolicy.CLASS) @Target({ElementType.TYPE}) public @interface TypeSystem { /** * Sets the types contained by this type system. The order of types also determines the order of * specialization. */ Class[] value(); }