Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 10085:9d15ca2f38d1
fix == on Register value
author | Mick Jordan <mick.jordan@oracle.com> |
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date | Tue, 18 Jun 2013 14:17:45 -0700 |
parents | ba02d19dd3cc |
children | 29e9a5d18c70 |
rev | line source |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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1 /* |
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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4 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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5 * This code is free software; you can redistribute it and/or modify it |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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6 * under the terms of the GNU General Public License version 2 only, as |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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7 * published by the Free Software Foundation. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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8 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
a4b84ba6dc2e
Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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13 * accompanied this code). |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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14 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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15 * You should have received a copy of the GNU General Public License version |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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18 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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21 * questions. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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22 */ |
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23 package com.oracle.truffle.api.nodes; |
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24 |
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25 import java.lang.annotation.*; |
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26 import java.util.*; |
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27 |
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28 import com.oracle.truffle.api.*; |
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29 |
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30 /** |
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31 * Abstract base class for all Truffle nodes. |
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32 */ |
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33 public abstract class Node implements Cloneable { |
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34 |
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35 /** |
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36 * Utility constant representing an empty node array. |
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37 */ |
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38 public static final Node[] EMPTY_ARRAY = new Node[0]; |
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39 |
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40 private Node parent; |
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41 |
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42 private SourceSection sourceSection; |
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43 |
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44 /** |
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45 * Marks array fields that are children of this node. |
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46 */ |
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47 @Retention(RetentionPolicy.RUNTIME) |
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48 @Target({ElementType.FIELD}) |
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49 public @interface Children { |
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50 } |
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51 |
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52 /** |
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53 * Marks fields that represent child nodes of this node. |
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54 */ |
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55 @Retention(RetentionPolicy.RUNTIME) |
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56 @Target({ElementType.FIELD}) |
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57 public @interface Child { |
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58 } |
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59 |
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60 /** |
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61 * Assigns a link to a guest language source section to this node. |
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62 * |
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63 * @param section the object representing a section in guest language source code |
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64 */ |
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65 public final void assignSourceSection(SourceSection section) { |
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66 if (sourceSection != null) { |
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67 throw new IllegalStateException("Source section is already assigned."); |
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68 } |
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69 this.sourceSection = section; |
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70 } |
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71 |
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72 /** |
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73 * Clears any previously assigned guest language source code from this node. |
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74 */ |
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75 public final void clearSourceSection() { |
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76 this.sourceSection = null; |
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77 } |
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78 |
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79 /** |
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80 * Retrieves the guest language source code section that is currently assigned to this node. |
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81 * |
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82 * @return the assigned source code section |
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83 */ |
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84 public final SourceSection getSourceSection() { |
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85 return sourceSection; |
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86 } |
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87 |
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88 /** |
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89 * Method that updates the link to the parent in the array of specified new child nodes to this |
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90 * node. |
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91 * |
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92 * @param newChildren the array of new children whose parent should be updated |
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93 * @return the array of new children |
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94 */ |
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95 protected final <T extends Node> T[] adoptChildren(T[] newChildren) { |
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96 if (newChildren != null) { |
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97 for (T n : newChildren) { |
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98 adoptChild(n); |
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99 } |
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100 } |
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101 return newChildren; |
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102 } |
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103 |
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104 /** |
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105 * Method that updates the link to the parent in the specified new child node to this node. |
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106 * |
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107 * @param newChild the new child whose parent should be updated |
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108 * @return the new child |
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109 */ |
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110 protected final <T extends Node> T adoptChild(T newChild) { |
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111 if (newChild != null) { |
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112 ((Node) newChild).parent = this; |
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113 } |
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114 return newChild; |
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115 } |
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116 |
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117 /** |
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118 * Returns properties of this node interesting for debugging and can be overwritten by |
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119 * subclasses to add their own custom properties. |
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120 * |
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121 * @return the properties as a key/value hash map |
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122 */ |
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123 public Map<String, Object> getDebugProperties() { |
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124 Map<String, Object> properties = new HashMap<>(); |
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125 return properties; |
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126 } |
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127 |
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128 /** |
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129 * The current parent node of this node. |
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130 * |
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131 * @return the parent node |
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132 */ |
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133 public final Node getParent() { |
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134 return parent; |
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135 } |
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136 |
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137 /** |
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138 * Replaces this node with another node. If there is a source section (see |
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139 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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140 * |
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141 * @param newNode the new node that is the replacement |
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142 * @param reason a description of the reason for the replacement |
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143 * @return the new node |
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144 */ |
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145 @SuppressWarnings({"unchecked"}) |
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146 public final <T extends Node> T replace(T newNode, String reason) { |
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147 assert this.getParent() != null; |
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148 if (sourceSection != null) { |
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149 // Pass on the source section to the new node. |
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150 newNode.assignSourceSection(sourceSection); |
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151 } |
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152 onReplace(newNode, reason); |
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153 return (T) this.getParent().replaceChild(this, newNode); |
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154 } |
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155 |
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156 private <T extends Node> T replaceChild(T oldChild, T newChild) { |
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157 NodeUtil.replaceChild(this, oldChild, newChild); |
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158 adoptChild(newChild); |
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159 return newChild; |
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160 } |
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161 |
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162 /** |
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163 * Replaces this node with another node. If there is a source section (see |
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164 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node. |
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165 * |
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166 * @param newNode the new node that is the replacement |
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167 * @return the new node |
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168 */ |
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169 public final <T extends Node> T replace(T newNode) { |
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170 return replace(newNode, ""); |
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171 } |
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172 |
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173 /** |
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174 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the |
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175 * node is rewritten. This method is invoked before the actual replace has happened. |
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176 * |
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177 * @param newNode the replacement node |
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178 * @param reason the reason the replace supplied |
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179 */ |
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180 protected void onReplace(Node newNode, String reason) { |
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181 } |
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182 |
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183 /** |
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184 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all |
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185 * child nodes. |
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186 * |
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187 * @param nodeVisitor the visitor |
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188 */ |
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189 public final void accept(NodeVisitor nodeVisitor) { |
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190 if (nodeVisitor.visit(this)) { |
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191 for (Node child : this.getChildren()) { |
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192 if (child != null) { |
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193 child.accept(nodeVisitor); |
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194 } |
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195 } |
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196 } |
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197 } |
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198 |
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199 /** |
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200 * Iterator over the children of this node. |
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201 * |
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202 * @return the iterator |
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203 */ |
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204 public final Iterable<Node> getChildren() { |
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205 final Node node = this; |
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206 return new Iterable<Node>() { |
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207 |
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208 public Iterator<Node> iterator() { |
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209 return new NodeUtil.NodeIterator(node); |
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210 } |
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211 }; |
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212 } |
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213 |
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214 /** |
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215 * Creates a shallow copy of this node. |
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216 * |
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217 * @return the new copy |
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218 */ |
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219 public Node copy() { |
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220 try { |
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221 return (Node) super.clone(); |
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222 } catch (CloneNotSupportedException e) { |
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223 return null; |
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224 } |
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225 } |
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226 |
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227 /** |
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228 * This method must never be called. It enforces that {@link Object#clone} is not directly |
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229 * called by subclasses. Use the {@link #copy()} method instead. |
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230 */ |
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231 @Override |
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232 @Deprecated |
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233 protected final Object clone() throws CloneNotSupportedException { |
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234 throw new IllegalStateException("This method should never be called, use the copy method instead!"); |
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235 } |
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236 |
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237 /** |
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238 * Converts this node to a textual representation useful for debugging. |
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239 */ |
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240 @Override |
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241 public String toString() { |
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242 StringBuilder sb = new StringBuilder(getClass().getSimpleName()); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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243 Map<String, Object> properties = getDebugProperties(); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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244 boolean hasProperties = false; |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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245 for (Map.Entry<String, Object> entry : properties.entrySet()) { |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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246 sb.append(hasProperties ? "," : "<"); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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247 hasProperties = true; |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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248 sb.append(entry.getKey()).append("=").append(entry.getValue()); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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249 } |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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250 if (hasProperties) { |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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251 sb.append(">"); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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252 } |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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253 sb.append("@").append(Integer.toHexString(hashCode())); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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254 return sb.toString(); |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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255 } |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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256 } |