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annotate truffle/com.oracle.truffle.sl/src/com/oracle/truffle/sl/runtime/SLContext.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 597953a8e6f0
children 8dddde8b20d4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, 2014, 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 * The Universal Permissive License (UPL), Version 1.0
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6 *
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7 * Subject to the condition set forth below, permission is hereby granted to any
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8 * person obtaining a copy of this software, associated documentation and/or
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9 * data (collectively the "Software"), free of charge and under any and all
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10 * copyright rights in the Software, and any and all patent rights owned or
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11 * freely licensable by each licensor hereunder covering either (i) the
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12 * unmodified Software as contributed to or provided by such licensor, or (ii)
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13 * the Larger Works (as defined below), to deal in both
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14 *
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15 * (a) the Software, and
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16 *
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17 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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18 * one is included with the Software each a "Larger Work" to which the Software
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19 * is contributed by such licensors),
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20 *
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21 * without restriction, including without limitation the rights to copy, create
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22 * derivative works of, display, perform, and distribute the Software and make,
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23 * use, sell, offer for sale, import, export, have made, and have sold the
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24 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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25 * either these or other terms.
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26 *
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27 * This license is subject to the following condition:
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28 *
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29 * The above copyright notice and either this complete permission notice or at a
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30 * minimum a reference to the UPL must be included in all copies or substantial
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31 * portions of the Software.
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32 *
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33 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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34 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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35 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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36 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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37 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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38 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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39 * SOFTWARE.
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40 */
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41 package com.oracle.truffle.sl.runtime;
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42
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43 import com.oracle.truffle.api.ExecutionContext;
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44 import com.oracle.truffle.api.dsl.NodeFactory;
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45 import com.oracle.truffle.api.frame.FrameDescriptor;
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46 import com.oracle.truffle.api.nodes.NodeInfo;
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47 import com.oracle.truffle.api.object.DynamicObject;
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48 import com.oracle.truffle.api.object.Layout;
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49 import com.oracle.truffle.api.object.Shape;
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50 import com.oracle.truffle.api.source.Source;
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51 import com.oracle.truffle.sl.SLLanguage;
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52 import com.oracle.truffle.sl.builtins.SLAssertFalseBuiltinFactory;
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53 import com.oracle.truffle.sl.builtins.SLAssertTrueBuiltinFactory;
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54 import com.oracle.truffle.sl.builtins.SLBuiltinNode;
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55 import com.oracle.truffle.sl.builtins.SLDefineFunctionBuiltinFactory;
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56 import com.oracle.truffle.sl.builtins.SLHelloEqualsWorldBuiltinFactory;
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57 import com.oracle.truffle.sl.builtins.SLNanoTimeBuiltinFactory;
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58 import com.oracle.truffle.sl.builtins.SLNewObjectBuiltinFactory;
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59 import com.oracle.truffle.sl.builtins.SLPrintlnBuiltin;
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60 import com.oracle.truffle.sl.builtins.SLPrintlnBuiltinFactory;
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61 import com.oracle.truffle.sl.builtins.SLReadlnBuiltin;
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62 import com.oracle.truffle.sl.builtins.SLReadlnBuiltinFactory;
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63 import com.oracle.truffle.sl.builtins.SLStackTraceBuiltinFactory;
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64 import com.oracle.truffle.sl.nodes.SLExpressionNode;
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65 import com.oracle.truffle.sl.nodes.SLRootNode;
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66 import com.oracle.truffle.sl.nodes.local.SLReadArgumentNode;
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67 import com.oracle.truffle.sl.parser.Parser;
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68 import com.oracle.truffle.sl.parser.SLNodeFactory;
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69 import java.io.BufferedReader;
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70 import java.io.PrintWriter;
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71 import java.math.BigInteger;
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72
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73 /**
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74 * The run-time state of SL during execution. One context is instantiated before any source code is
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75 * parsed, and this context is passed around to all methods that need access to it. For example, the
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76 * context is used during {@link SLNodeFactory parsing} and by {@link SLBuiltinNode#getContext()
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77 * builtin functions}.
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78 * <p>
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79 * It would be an error to have two different context instances during the execution of one script.
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80 * However, if two separate scripts run in one Java VM at the same time, they have a different
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81 * context. Therefore, the context is not a singleton.
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82 */
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83 public final class SLContext extends ExecutionContext {
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84 private static final Layout LAYOUT = Layout.createLayout();
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85
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86 private final SLLanguage language;
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87 private final BufferedReader input;
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88 private final PrintWriter output;
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89 private final SLFunctionRegistry functionRegistry;
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90 private final Shape emptyShape;
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91
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92 public SLContext(SLLanguage language, BufferedReader input, PrintWriter output) {
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93 this(language, input, output, true);
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94 }
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95
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96 public SLContext(SLLanguage language) {
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97 this(language, null, null, false);
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98 }
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99
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100 private SLContext(SLLanguage language, BufferedReader input, PrintWriter output, boolean installBuiltins) {
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101 this.language = language;
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102 this.input = input;
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103 this.output = output;
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104 this.functionRegistry = new SLFunctionRegistry();
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105 installBuiltins(installBuiltins);
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106
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107 this.emptyShape = LAYOUT.createShape(new SLObjectType());
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108 }
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109
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110 /**
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111 * Returns the default input, i.e., the source for the {@link SLReadlnBuiltin}. To allow unit
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112 * testing, we do not use {@link System#in} directly.
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113 */
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114 public BufferedReader getInput() {
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115 return input;
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116 }
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117
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118 /**
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119 * The default default, i.e., the output for the {@link SLPrintlnBuiltin}. To allow unit
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120 * testing, we do not use {@link System#out} directly.
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121 */
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122 public PrintWriter getOutput() {
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123 return output;
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124 }
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125
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126 /**
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127 * Returns the registry of all functions that are currently defined.
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128 */
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129 public SLFunctionRegistry getFunctionRegistry() {
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130 return functionRegistry;
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131 }
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132
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133 public SLLanguage getLanguage() {
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134 return language;
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135 }
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136
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137 /**
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138 * Adds all builtin functions to the {@link SLFunctionRegistry}. This method lists all
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139 * {@link SLBuiltinNode builtin implementation classes}.
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140 */
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141 private void installBuiltins(boolean registerRootNodes) {
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142 installBuiltin(SLReadlnBuiltinFactory.getInstance(), registerRootNodes);
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143 installBuiltin(SLPrintlnBuiltinFactory.getInstance(), registerRootNodes);
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144 installBuiltin(SLNanoTimeBuiltinFactory.getInstance(), registerRootNodes);
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145 installBuiltin(SLDefineFunctionBuiltinFactory.getInstance(), registerRootNodes);
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146 installBuiltin(SLStackTraceBuiltinFactory.getInstance(), registerRootNodes);
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147 installBuiltin(SLHelloEqualsWorldBuiltinFactory.getInstance(), registerRootNodes);
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148 installBuiltin(SLAssertTrueBuiltinFactory.getInstance(), registerRootNodes);
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149 installBuiltin(SLAssertFalseBuiltinFactory.getInstance(), registerRootNodes);
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150 installBuiltin(SLNewObjectBuiltinFactory.getInstance(), registerRootNodes);
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151 }
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152
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153 public void installBuiltin(NodeFactory<? extends SLBuiltinNode> factory, boolean registerRootNodes) {
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154 /*
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155 * The builtin node factory is a class that is automatically generated by the Truffle DSL.
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156 * The signature returned by the factory reflects the signature of the @Specialization
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157 * methods in the builtin classes.
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158 */
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159 int argumentCount = factory.getExecutionSignature().size();
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160 SLExpressionNode[] argumentNodes = new SLExpressionNode[argumentCount];
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161 /*
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162 * Builtin functions are like normal functions, i.e., the arguments are passed in as an
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163 * Object[] array encapsulated in SLArguments. A SLReadArgumentNode extracts a parameter
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164 * from this array.
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165 */
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166 for (int i = 0; i < argumentCount; i++) {
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167 argumentNodes[i] = new SLReadArgumentNode(null, i);
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168 }
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169 /* Instantiate the builtin node. This node performs the actual functionality. */
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170 SLBuiltinNode builtinBodyNode = factory.createNode(argumentNodes, this);
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171 /* The name of the builtin function is specified via an annotation on the node class. */
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172 String name = lookupNodeInfo(builtinBodyNode.getClass()).shortName();
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173 /* Wrap the builtin in a RootNode. Truffle requires all AST to start with a RootNode. */
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174 SLRootNode rootNode = new SLRootNode(this, new FrameDescriptor(), builtinBodyNode, name);
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175
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176 if (registerRootNodes) {
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177 /* Register the builtin function in our function registry. */
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178 getFunctionRegistry().register(name, rootNode);
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179 } else {
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180 // make sure the function is known
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181 getFunctionRegistry().lookup(name);
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182 }
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183 }
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184
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185 public static NodeInfo lookupNodeInfo(Class<?> clazz) {
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186 if (clazz == null) {
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187 return null;
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188 }
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189 NodeInfo info = clazz.getAnnotation(NodeInfo.class);
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190 if (info != null) {
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191 return info;
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192 } else {
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193 return lookupNodeInfo(clazz.getSuperclass());
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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 * Evaluate a source, causing any definitions to be registered (but not executed).
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199 *
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200 * @param source The {@link Source} to parse.
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201 */
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202 public void evalSource(Source source) {
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203 Parser.parseSL(this, source);
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204 }
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205
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206 public DynamicObject createObject() {
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207 return LAYOUT.newInstance(emptyShape);
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208 }
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209
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210 public static boolean isSLObject(Object value) {
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211 return LAYOUT.getType().isInstance(value);
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212 }
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213
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214 public static DynamicObject castSLObject(Object value) {
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215 return LAYOUT.getType().cast(value);
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216 }
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217
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218 public static Object fromForeignValue(Object a) {
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219 if (a instanceof Long || a instanceof BigInteger) {
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220 return a;
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221 } else if (a instanceof Number) {
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222 return ((Number) a).longValue();
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223 }
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224 return a;
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225 }
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226 }