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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/SLMain.java @ 21468:99942eac9c6d

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Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Fri, 22 May 2015 13:41:10 +0200
parents 2170de9acab0
children 286aef83a9a7
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1 /*
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2 * Copyright (c) 2012, 2015, 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.sl;
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24
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25 import java.io.*;
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26 import java.math.*;
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27 import java.util.Scanner;
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28
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29 import com.oracle.truffle.api.*;
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30 import com.oracle.truffle.api.dsl.*;
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31 import com.oracle.truffle.api.instrument.*;
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32 import com.oracle.truffle.api.nodes.*;
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33 import com.oracle.truffle.api.source.*;
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34 import com.oracle.truffle.api.tools.*;
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35 import com.oracle.truffle.api.vm.TruffleVM;
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36 import com.oracle.truffle.sl.builtins.*;
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37 import com.oracle.truffle.sl.factory.*;
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38 import com.oracle.truffle.sl.nodes.*;
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39 import com.oracle.truffle.sl.nodes.call.*;
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40 import com.oracle.truffle.sl.nodes.controlflow.*;
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41 import com.oracle.truffle.sl.nodes.expression.*;
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42 import com.oracle.truffle.sl.nodes.instrument.*;
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43 import com.oracle.truffle.sl.nodes.local.*;
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44 import com.oracle.truffle.sl.parser.*;
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45 import com.oracle.truffle.sl.runtime.*;
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46
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47 /**
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48 * SL is a simple language to demonstrate and showcase features of Truffle. The implementation is as
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49 * simple and clean as possible in order to help understanding the ideas and concepts of Truffle.
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50 * The language has first class functions, but no object model.
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51 * <p>
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52 * SL is dynamically typed, i.e., there are no type names specified by the programmer. SL is
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53 * strongly typed, i.e., there is no automatic conversion between types. If an operation is not
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54 * available for the types encountered at run time, a type error is reported and execution is
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55 * stopped. For example, {@code 4 - "2"} results in a type error because subtraction is only defined
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56 * for numbers.
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57 *
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58 * <p>
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59 * <b>Types:</b>
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60 * <ul>
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61 * <li>Number: arbitrary precision integer numbers. The implementation uses the Java primitive type
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62 * {@code long} to represent numbers that fit into the 64 bit range, and {@link BigInteger} for
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63 * numbers that exceed the range. Using a primitive type such as {@code long} is crucial for
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64 * performance.
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65 * <li>Boolean: implemented as the Java primitive type {@code boolean}.
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66 * <li>String: implemented as the Java standard type {@link String}.
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67 * <li>Function: implementation type {@link SLFunction}.
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68 * <li>Null (with only one value {@code null}): implemented as the singleton
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69 * {@link SLNull#SINGLETON}.
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70 * </ul>
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71 * The class {@link SLTypes} lists these types for the Truffle DSL, i.e., for type-specialized
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72 * operations that are specified using Truffle DSL annotations.
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73 *
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74 * <p>
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75 * <b>Language concepts:</b>
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76 * <ul>
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77 * <li>Literals for {@link SLBigIntegerLiteralNode numbers} , {@link SLStringLiteralNode strings},
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78 * and {@link SLFunctionLiteralNode functions}.
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79 * <li>Basic arithmetic, logical, and comparison operations: {@link SLAddNode +}, {@link SLSubNode
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80 * -}, {@link SLMulNode *}, {@link SLDivNode /}, {@link SLLogicalAndNode logical and},
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81 * {@link SLLogicalOrNode logical or}, {@link SLEqualNode ==}, !=, {@link SLLessThanNode &lt;},
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82 * {@link SLLessOrEqualNode &le;}, &gt;, &ge;.
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83 * <li>Local variables: local variables must be defined (via a {@link SLWriteLocalVariableNode
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84 * write}) before they can be used (by a {@link SLReadLocalVariableNode read}). Local variables are
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85 * not visible outside of the block where they were first defined.
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86 * <li>Basic control flow statements: {@link SLBlockNode blocks}, {@link SLIfNode if},
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87 * {@link SLWhileNode while} with {@link SLBreakNode break} and {@link SLContinueNode continue},
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88 * {@link SLReturnNode return}.
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89 * <li>Function calls: {@link SLInvokeNode invocations} are efficiently implemented with
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90 * {@link SLDispatchNode polymorphic inline caches}.
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91 * </ul>
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92 *
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93 * <p>
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94 * <b>Syntax and parsing:</b><br>
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95 * The syntax is described as an attributed grammar. The {@link Parser} and {@link Scanner} are
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96 * automatically generated by the parser generator Coco/R (available from <a
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97 * href="http://ssw.jku.at/coco/">http://ssw.jku.at/coco/</a>). The grammar contains semantic
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98 * actions that build the AST for a method. To keep these semantic actions short, they are mostly
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99 * calls to the {@link SLNodeFactory} that performs the actual node creation. All functions found in
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100 * the SL source are added to the {@link SLFunctionRegistry}, which is accessible from the
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101 * {@link SLContext}.
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102 *
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103 * <p>
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104 * <b>Builtin functions:</b><br>
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105 * Library functions that are available to every SL source without prior definition are called
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106 * builtin functions. They are added to the {@link SLFunctionRegistry} when the {@link SLContext} is
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107 * created. There current builtin functions are
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108 * <ul>
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109 * <li>{@link SLReadlnBuiltin readln}: Read a String from the {@link SLContext#getInput() standard
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110 * input}.
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111 * <li>{@link SLPrintlnBuiltin println}: Write a value to the {@link SLContext#getOutput() standard
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112 * output}.
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113 * <li>{@link SLNanoTimeBuiltin nanoTime}: Returns the value of a high-resolution time, in
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114 * nanoseconds.
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115 * <li>{@link SLDefineFunctionBuiltin defineFunction}: Parses the functions provided as a String
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116 * argument and adds them to the function registry. Functions that are already defined are replaced
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117 * with the new version.
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118 * </ul>
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119 *
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120 * <p>
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121 * <b>Tools:</b><br>
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122 * The use of some of Truffle's support for developer tools (based on the Truffle Instrumentation
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123 * Framework) are demonstrated in this file, for example:
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124 * <ul>
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125 * <li>a {@linkplain NodeExecCounter counter for node executions}, tabulated by node type; and</li>
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126 * <li>a simple {@linkplain CoverageTracker code coverage engine}.</li>
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127 * </ul>
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128 * In each case, the tool is enabled if a corresponding local boolean variable in this file is set
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129 * to {@code true}. Results are printed at the end of the execution using each tool's
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130 * <em>default printer</em>.
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131 *
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132 */
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133 @TruffleLanguage.Registration(name = "sl", mimeType = "application/x-sl")
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134 public class SLMain extends TruffleLanguage {
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135 private final SLContext context;
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136
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137 public SLMain() {
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138 this.context = SLContextFactory.create(new BufferedReader(new InputStreamReader(System.in)), System.out);
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139 }
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140
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141 /* Demonstrate per-type tabulation of node execution counts */
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142 private static boolean nodeExecCounts = false;
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143 /* Demonstrate per-line tabulation of STATEMENT node execution counts */
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144 private static boolean statementCounts = false;
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145 /* Demonstrate per-line tabulation of STATEMENT coverage */
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146 private static boolean coverage = false;
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147
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148 /**
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149 * The main entry point. Use the mx command "mx sl" to run it with the correct class path setup.
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150 */
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151 public static void main(String[] args) throws IOException {
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152 TruffleVM vm = TruffleVM.create();
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153 assert vm.getLanguages().containsKey("application/x-sl");
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154
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155 int repeats = 1;
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156 if (args.length >= 2) {
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157 repeats = Integer.parseInt(args[1]);
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158 }
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159
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160 while (repeats-- > 0) {
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161 if (args.length == 0) {
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162 vm.eval("application/x-sl", new InputStreamReader(System.in));
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163 } else {
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164 vm.eval(new File(args[0]).toURI());
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165 }
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166 }
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167 }
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168
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169 /**
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170 * Parse and run the specified SL source. Factored out in a separate method so that it can also
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171 * be used by the unit test harness.
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172 */
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173 public static long run(SLContext context, Source source, PrintStream logOutput, int repeats) {
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174 if (logOutput != null) {
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175 logOutput.println("== running on " + Truffle.getRuntime().getName());
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176 // logOutput.println("Source = " + source.getCode());
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177 }
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178
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179 if (statementCounts || coverage) {
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180 Probe.registerASTProber(new SLStandardASTProber());
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181 }
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182
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183 NodeExecCounter nodeExecCounter = null;
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184 if (nodeExecCounts) {
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185 nodeExecCounter = new NodeExecCounter();
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186 nodeExecCounter.install();
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187 }
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188
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189 NodeExecCounter statementExecCounter = null;
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190 if (statementCounts) {
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191 statementExecCounter = new NodeExecCounter(StandardSyntaxTag.STATEMENT);
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192 statementExecCounter.install();
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193 }
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194
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195 CoverageTracker coverageTracker = null;
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196 if (coverage) {
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197 coverageTracker = new CoverageTracker();
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198 coverageTracker.install();
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199 }
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200
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201 /* Parse the SL source file. */
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202 Parser.parseSL(context, source);
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diff changeset
203
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204 /* Lookup our main entry point, which is per definition always named "main". */
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205 SLFunction main = context.getFunctionRegistry().lookup("main");
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206 if (main.getCallTarget() == null) {
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207 throw new SLException("No function main() defined in SL source file.");
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208 }
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209
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210 /* Change to true if you want to see the AST on the console. */
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211 boolean printASTToLog = false;
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212 /* Change to true if you want to see source attribution for the AST to the console */
16687
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diff changeset
213 boolean printSourceAttributionToLog = false;
13862
f9b934e1e172 SL: Make SL use the new UnsupportedSpecializationException#getSuppliedNodes() for error messages; Disabled dumping by default to IGV.
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diff changeset
214 /* Change to dump the AST to IGV over the network. */
f9b934e1e172 SL: Make SL use the new UnsupportedSpecializationException#getSuppliedNodes() for error messages; Disabled dumping by default to IGV.
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diff changeset
215 boolean dumpASTToIGV = false;
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diff changeset
216
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217 printScript("before execution", context, logOutput, printASTToLog, printSourceAttributionToLog, dumpASTToIGV);
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diff changeset
218 long totalRuntime = 0;
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219 try {
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220 for (int i = 0; i < repeats; i++) {
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221 long start = System.nanoTime();
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222 /* Call the main entry point, without any arguments. */
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diff changeset
223 try {
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64dcb92ee75a Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
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diff changeset
224 Object result = main.getCallTarget().call();
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225 if (result != SLNull.SINGLETON) {
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diff changeset
226 context.getOutput().println(result);
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227 }
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228 } catch (UnsupportedSpecializationException ex) {
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229 context.getOutput().println(formatTypeError(ex));
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230 }
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231 long end = System.nanoTime();
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diff changeset
232 totalRuntime += end - start;
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233
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234 if (logOutput != null && repeats > 1) {
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235 logOutput.println("== iteration " + (i + 1) + ": " + ((end - start) / 1000000) + " ms");
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236 }
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237 }
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238
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239 } finally {
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240 printScript("after execution", context, logOutput, printASTToLog, printSourceAttributionToLog, dumpASTToIGV);
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241 }
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242 if (nodeExecCounter != null) {
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243 nodeExecCounter.print(System.out);
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244 nodeExecCounter.dispose();
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245 }
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246 if (statementExecCounter != null) {
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247 statementExecCounter.print(System.out);
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248 statementExecCounter.dispose();
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249 }
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250 if (coverageTracker != null) {
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251 coverageTracker.print(System.out);
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252 coverageTracker.dispose();
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253 }
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254 return totalRuntime;
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255 }
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256
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257 /**
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258 * When dumpASTToIGV is true: dumps the AST of all functions to the IGV visualizer, via a socket
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259 * connection. IGV can be started with the mx command "mx igv".
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260 * <p>
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261 * When printASTToLog is true: prints the ASTs to the console.
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262 */
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263 private static void printScript(String groupName, SLContext context, PrintStream logOutput, boolean printASTToLog, boolean printSourceAttributionToLog, boolean dumpASTToIGV) {
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264 if (dumpASTToIGV) {
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265 GraphPrintVisitor graphPrinter = new GraphPrintVisitor();
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266 graphPrinter.beginGroup(groupName);
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267 for (SLFunction function : context.getFunctionRegistry().getFunctions()) {
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268 RootCallTarget callTarget = function.getCallTarget();
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269 if (callTarget != null) {
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270 graphPrinter.beginGraph(function.toString()).visit(callTarget.getRootNode());
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271 }
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272 }
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273 graphPrinter.printToNetwork(true);
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274 }
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275 if (printASTToLog && logOutput != null) {
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276 for (SLFunction function : context.getFunctionRegistry().getFunctions()) {
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277 RootCallTarget callTarget = function.getCallTarget();
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278 if (callTarget != null) {
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279 logOutput.println("=== " + function);
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280 NodeUtil.printTree(logOutput, callTarget.getRootNode());
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281 }
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282 }
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283 }
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284 if (printSourceAttributionToLog && logOutput != null) {
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285 for (SLFunction function : context.getFunctionRegistry().getFunctions()) {
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286 RootCallTarget callTarget = function.getCallTarget();
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287 if (callTarget != null) {
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288 logOutput.println("=== " + function);
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289 NodeUtil.printSourceAttributionTree(logOutput, callTarget.getRootNode());
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290 }
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291 }
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292 }
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293 }
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294
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295 /**
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296 * Provides a user-readable message for run-time type errors. SL is strongly typed, i.e., there
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297 * are no automatic type conversions of values. Therefore, Truffle does the type checking for
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298 * us: if no matching node specialization for the actual values is found, then we have a type
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299 * error. Specialized nodes use the {@link UnsupportedSpecializationException} to report that no
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300 * specialization was found. We therefore just have to convert the information encapsulated in
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301 * this exception in a user-readable form.
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302 */
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303 private static String formatTypeError(UnsupportedSpecializationException ex) {
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304 StringBuilder result = new StringBuilder();
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305 result.append("Type error");
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306 if (ex.getNode() != null && ex.getNode().getSourceSection() != null) {
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307 SourceSection ss = ex.getNode().getSourceSection();
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308 if (ss != null && !(ss instanceof NullSourceSection)) {
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309 result.append(" at ").append(ss.getSource().getName()).append(" line ").append(ss.getStartLine()).append(" col ").append(ss.getStartColumn());
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310 }
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311 }
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312 result.append(": operation");
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313 if (ex.getNode() != null) {
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314 NodeInfo nodeInfo = SLContext.lookupNodeInfo(ex.getNode().getClass());
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315 if (nodeInfo != null) {
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316 result.append(" \"").append(nodeInfo.shortName()).append("\"");
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317 }
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318 }
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319 result.append(" not defined for");
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320
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diff changeset
321 String sep = " ";
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diff changeset
322 for (int i = 0; i < ex.getSuppliedValues().length; i++) {
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diff changeset
323 Object value = ex.getSuppliedValues()[i];
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diff changeset
324 Node node = ex.getSuppliedNodes()[i];
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diff changeset
325 if (node != null) {
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326 result.append(sep);
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327 sep = ", ";
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328
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329 if (value instanceof Long || value instanceof BigInteger) {
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diff changeset
330 result.append("Number ").append(value);
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diff changeset
331 } else if (value instanceof Boolean) {
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332 result.append("Boolean ").append(value);
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diff changeset
333 } else if (value instanceof String) {
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diff changeset
334 result.append("String \"").append(value).append("\"");
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diff changeset
335 } else if (value instanceof SLFunction) {
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336 result.append("Function ").append(value);
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337 } else if (value == SLNull.SINGLETON) {
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diff changeset
338 result.append("NULL");
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339 } else if (value == null) {
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340 // value is not evaluated because of short circuit evaluation
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diff changeset
341 result.append("ANY");
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342 } else {
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343 result.append(value);
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344 }
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345 }
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346 }
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diff changeset
347 return result.toString();
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348 }
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349
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350 @Override
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351 protected Object eval(Source code) throws IOException {
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352 context.executeMain(code);
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353 return null;
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354 }
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355
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356 @Override
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357 protected Object findExportedSymbol(String globalName) {
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358 return null;
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diff changeset
359 }
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diff changeset
360
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diff changeset
361 @Override
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
362 protected Object getLanguageGlobal() {
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
363 return null;
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
364 }
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
365
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
366 @Override
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
367 protected boolean isObjectOfLanguage(Object object) {
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
368 return false;
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
369 }
99942eac9c6d Introducing TruffleVM - a central place to invoke code in any registered TruffleLanguage.
Jaroslav Tulach <jaroslav.tulach@oracle.com>
parents: 20956
diff changeset
370
7292
213c1297a814 Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff changeset
371 }