Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api.codegen/src/com/oracle/truffle/api/codegen/TypeCheck.java @ 9220:97ad6d3e7557
Codegen API changes. Executed child nodes are now defined using @NodeChildren instead of fields.
author | Christian Humer <christian.humer@gmail.com> |
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date | Sat, 20 Apr 2013 12:16:22 +0200 |
parents | 5e3d1a68664e |
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rev | line source |
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Truffle API to specify type-specalized Node classes; annotation processor for automatic code generation of the type-specialized Node classes during the build process
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1 /* |
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.api.codegen; |
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24 |
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25 import java.lang.annotation.*; |
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26 |
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27 /** |
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28 * <p> |
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29 * Provides a way to define a custom type check for a defined type. The name of the annotated method |
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30 * must fit to the pattern is${typeName} (eg. isInteger), where ${typeName} must be a valid type |
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31 * defined in the parent {@link TypeSystem}. The annotated method must have exactly one argument |
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32 * where the type of the argument is the generic type {@link Object} or a more specific one from the |
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33 * {@link TypeSystem}. You can define multiple overloaded {@link TypeCheck} methods for the same |
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34 * type. This can be used to reduce the boxing overhead in type conversions. |
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35 * </p> |
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36 * |
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37 * <p> |
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38 * By default the system generates type checks for all types in the parent {@link TypeSystem} which |
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39 * look like the follows: |
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40 * |
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41 * <pre> |
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42 * {@literal @}TypeCheck |
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43 * boolean is${typeName}(Object value) { |
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44 * return value instanceof ${typeName}; |
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45 * } |
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46 * </pre> |
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47 * |
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48 * </p> |
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49 * |
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50 * <b>Example:</b> |
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51 * <p> |
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52 * A type check for BigInteger with one overloaded optimized variant to reduce boxing. |
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53 * </p> |
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54 * |
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55 * <pre> |
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56 * |
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57 * |
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58 * {@literal @}TypeSystem(types = {int.class, BigInteger.class, String.class}, nodeBaseClass = TypedNode.class) |
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59 * public abstract class Types { |
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60 * |
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61 * {@literal @}TypeCheck |
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62 * public boolean isBigInteger(Object value) { |
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63 * return value instanceof Integer || value instanceof BigInteger; |
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64 * } |
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65 * |
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66 * {@literal @}TypeCheck |
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67 * public boolean isBigInteger(int value) { |
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68 * return true; |
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69 * } |
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70 * |
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71 * } |
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72 * </pre> |
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73 * |
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74 * |
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75 */ |
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76 @Retention(RetentionPolicy.CLASS) |
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77 @Target({ElementType.METHOD}) |
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78 public @interface TypeCheck { |
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79 |
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80 } |