Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SLNodeFactory.java @ 16687:7c8ddb4233cd
SL/SourceAttribution: restore some attribution fixes that were lost in a tussle with hg; turn off tracing code in SL tests.
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Mon, 04 Aug 2014 18:53:21 -0700 |
parents | 888907296590 |
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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 * 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.parser; |
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24 |
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25 import java.math.*; |
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26 import java.util.*; |
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27 |
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28 import com.oracle.truffle.api.frame.*; |
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29 import com.oracle.truffle.api.nodes.*; |
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30 import com.oracle.truffle.api.source.*; |
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31 import com.oracle.truffle.sl.nodes.*; |
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32 import com.oracle.truffle.sl.nodes.call.*; |
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33 import com.oracle.truffle.sl.nodes.controlflow.*; |
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34 import com.oracle.truffle.sl.nodes.expression.*; |
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35 import com.oracle.truffle.sl.nodes.instrument.*; |
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36 import com.oracle.truffle.sl.nodes.local.*; |
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37 import com.oracle.truffle.sl.runtime.*; |
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38 |
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39 /** |
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40 * Helper class used by the SL {@link Parser} to create nodes. The code is factored out of the |
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41 * automatically generated parser to keep the attributed grammar of SL small. |
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42 */ |
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43 public class SLNodeFactory { |
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44 |
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45 /** |
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46 * Local variable names that are visible in the current block. Variables are not visible outside |
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47 * of their defining block, to prevent the usage of undefined variables. Because of that, we can |
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48 * decide during parsing if a name references a local variable or is a function name. |
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49 */ |
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50 static class LexicalScope { |
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51 protected final LexicalScope outer; |
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52 protected final Map<String, FrameSlot> locals; |
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53 |
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54 public LexicalScope(LexicalScope outer) { |
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55 this.outer = outer; |
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56 this.locals = new HashMap<>(); |
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57 if (outer != null) { |
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58 locals.putAll(outer.locals); |
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59 } |
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60 } |
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61 } |
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62 |
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63 /* State while parsing a source unit. */ |
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64 private final SLContext context; |
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65 private final Source source; |
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66 |
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67 /* State while parsing a function. */ |
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68 private int functionStartPos; |
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69 private String functionName; |
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70 private int functionBodyStartPos; // includes parameter list |
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71 private int parameterCount; |
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72 private FrameDescriptor frameDescriptor; |
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73 private List<SLStatementNode> methodNodes; |
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74 |
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75 /* State while parsing a block. */ |
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76 private LexicalScope lexicalScope; |
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77 |
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78 private final SLNodeProber prober; |
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79 |
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80 public SLNodeFactory(SLContext context, Source source, SLNodeProber prober) { |
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81 this.context = context; |
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82 this.source = source; |
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83 this.prober = prober; |
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84 } |
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85 |
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86 public void startFunction(Token nameToken, int bodyStartPos) { |
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87 assert functionStartPos == 0; |
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88 assert functionName == null; |
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89 assert functionBodyStartPos == 0; |
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90 assert parameterCount == 0; |
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91 assert frameDescriptor == null; |
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92 assert lexicalScope == null; |
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93 |
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94 functionStartPos = nameToken.charPos; |
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95 functionName = nameToken.val; |
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96 functionBodyStartPos = bodyStartPos; |
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97 frameDescriptor = new FrameDescriptor(); |
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98 methodNodes = new ArrayList<>(); |
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99 startBlock(); |
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100 } |
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101 |
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102 public void addFormalParameter(Token nameToken) { |
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103 /* |
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104 * Method parameters are assigned to local variables at the beginning of the method. This |
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105 * ensures that accesses to parameters are specialized the same way as local variables are |
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106 * specialized. |
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107 */ |
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108 final SourceSection src = srcFromToken(nameToken); |
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109 final SLReadArgumentNode readArg = new SLReadArgumentNode(src, parameterCount); |
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110 methodNodes.add(createAssignment(nameToken, readArg)); |
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111 parameterCount++; |
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112 } |
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113 |
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114 public void finishFunction(SLStatementNode bodyNode) { |
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115 methodNodes.add(bodyNode); |
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116 final int bodyEndPos = bodyNode.getSourceSection().getCharEndIndex(); |
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117 final SourceSection functionSrc = source.createSection(functionName, functionStartPos, bodyEndPos - functionStartPos); |
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118 final SLStatementNode methodBlock = finishBlock(methodNodes, functionBodyStartPos, bodyEndPos - functionBodyStartPos); |
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119 assert lexicalScope == null : "Wrong scoping of blocks in parser"; |
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120 |
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121 final SLFunctionBodyNode functionBodyNode = new SLFunctionBodyNode(functionSrc, methodBlock); |
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122 final SLRootNode rootNode = new SLRootNode(frameDescriptor, functionBodyNode, functionName); |
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123 |
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124 context.getFunctionRegistry().register(functionName, rootNode); |
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125 |
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126 functionStartPos = 0; |
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127 functionName = null; |
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128 functionBodyStartPos = 0; |
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129 parameterCount = 0; |
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130 frameDescriptor = null; |
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131 lexicalScope = null; |
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132 } |
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133 |
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134 public void startBlock() { |
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135 lexicalScope = new LexicalScope(lexicalScope); |
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136 } |
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137 |
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138 public SLStatementNode finishBlock(List<SLStatementNode> bodyNodes, int startPos, int length) { |
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139 lexicalScope = lexicalScope.outer; |
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140 |
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141 List<SLStatementNode> flattenedNodes = new ArrayList<>(bodyNodes.size()); |
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142 flattenBlocks(bodyNodes, flattenedNodes); |
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143 |
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144 final SourceSection src = source.createSection("block", startPos, length); |
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145 return new SLBlockNode(src, flattenedNodes.toArray(new SLStatementNode[flattenedNodes.size()])); |
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146 } |
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147 |
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148 private void flattenBlocks(Iterable<? extends Node> bodyNodes, List<SLStatementNode> flattenedNodes) { |
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149 for (Node n : bodyNodes) { |
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150 if (n instanceof SLBlockNode) { |
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151 flattenBlocks(n.getChildren(), flattenedNodes); |
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152 } else { |
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153 flattenedNodes.add((SLStatementNode) n); |
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154 } |
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155 } |
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156 } |
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157 |
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158 public SLStatementNode createBreak(Token breakToken) { |
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159 return new SLBreakNode(srcFromToken(breakToken)); |
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160 } |
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161 |
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162 public SLStatementNode createContinue(Token continueToken) { |
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163 return new SLContinueNode(srcFromToken(continueToken)); |
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164 } |
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165 |
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166 public SLStatementNode createWhile(Token whileToken, SLExpressionNode conditionNode, SLStatementNode bodyNode) { |
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167 final int start = whileToken.charPos; |
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168 final int end = bodyNode.getSourceSection().getCharEndIndex(); |
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169 return new SLWhileNode(source.createSection(whileToken.val, start, end - start), conditionNode, bodyNode); |
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170 } |
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171 |
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172 public SLStatementNode createIf(Token ifToken, SLExpressionNode conditionNode, SLStatementNode thenPartNode, SLStatementNode elsePartNode) { |
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173 final int start = ifToken.charPos; |
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174 final int end = elsePartNode == null ? thenPartNode.getSourceSection().getCharEndIndex() : elsePartNode.getSourceSection().getCharEndIndex(); |
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175 |
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176 // if (prober != null) { |
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177 // SLStatementNode wrappedThenNode = prober.probeAsStatement(thenPartNode); |
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178 // // SLStatementNode wrappedElseNode = prober.probeAsStatement(elsePartNode); |
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179 // return new SLIfNode(source.createSection(t.val, start, end - start), conditionNode, |
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180 // wrappedThenNode, elsePartNode); |
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181 // } |
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182 |
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183 return new SLIfNode(source.createSection(ifToken.val, start, end - start), conditionNode, thenPartNode, elsePartNode); |
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184 } |
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185 |
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186 public SLStatementNode createReturn(Token t, SLExpressionNode valueNode) { |
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187 final int start = t.charPos; |
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188 final int length = valueNode == null ? t.val.length() : valueNode.getSourceSection().getCharEndIndex() - start; |
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189 return new SLReturnNode(source.createSection(t.val, start, length), valueNode); |
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190 } |
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191 |
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192 public SLExpressionNode createBinary(Token opToken, SLExpressionNode leftNode, SLExpressionNode rightNode) { |
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193 int start = leftNode.getSourceSection().getCharIndex(); |
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194 int length = rightNode.getSourceSection().getCharEndIndex() - start; |
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195 final SourceSection src = source.createSection(opToken.val, start, length); |
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196 switch (opToken.val) { |
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197 case "+": |
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198 return SLAddNodeFactory.create(src, leftNode, rightNode); |
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199 case "*": |
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200 return SLMulNodeFactory.create(src, leftNode, rightNode); |
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201 case "/": |
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202 return SLDivNodeFactory.create(src, leftNode, rightNode); |
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203 case "-": |
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204 return SLSubNodeFactory.create(src, leftNode, rightNode); |
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205 case "<": |
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206 return SLLessThanNodeFactory.create(src, leftNode, rightNode); |
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207 case "<=": |
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208 return SLLessOrEqualNodeFactory.create(src, leftNode, rightNode); |
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209 case ">": |
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210 return SLLogicalNotNodeFactory.create(src, SLLessOrEqualNodeFactory.create(null, leftNode, rightNode)); |
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211 case ">=": |
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212 return SLLogicalNotNodeFactory.create(src, SLLessThanNodeFactory.create(null, leftNode, rightNode)); |
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213 case "==": |
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214 return SLEqualNodeFactory.create(src, leftNode, rightNode); |
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215 case "!=": |
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216 return SLLogicalNotNodeFactory.create(src, SLEqualNodeFactory.create(null, leftNode, rightNode)); |
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217 case "&&": |
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218 return SLLogicalAndNodeFactory.create(src, leftNode, rightNode); |
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219 case "||": |
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220 return SLLogicalOrNodeFactory.create(src, leftNode, rightNode); |
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221 default: |
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222 throw new RuntimeException("unexpected operation: " + opToken.val); |
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223 } |
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224 } |
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225 |
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226 public SLExpressionNode createCall(Token nameToken, List<SLExpressionNode> parameterNodes, Token finalToken) { |
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227 final int startPos = nameToken.charPos; |
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228 final int endPos = finalToken.charPos + finalToken.val.length(); |
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229 final SourceSection src = source.createSection(nameToken.val, startPos, endPos - startPos); |
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230 SLExpressionNode functionNode = createRead(nameToken); |
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231 if (prober != null) { |
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232 SLExpressionNode wrappedNode = prober.probeAsCall(functionNode, nameToken.val); |
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233 return SLInvokeNode.create(src, wrappedNode, parameterNodes.toArray(new SLExpressionNode[parameterNodes.size()])); |
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234 } |
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235 return SLInvokeNode.create(src, functionNode, parameterNodes.toArray(new SLExpressionNode[parameterNodes.size()])); |
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236 } |
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237 |
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238 public SLExpressionNode createAssignment(Token nameToken, SLExpressionNode valueNode) { |
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239 FrameSlot frameSlot = frameDescriptor.findOrAddFrameSlot(nameToken.val); |
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240 lexicalScope.locals.put(nameToken.val, frameSlot); |
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241 final int start = nameToken.charPos; |
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242 final int length = valueNode.getSourceSection().getCharEndIndex() - start; |
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243 if (prober != null) { |
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244 final SLExpressionNode wrappedNode = prober.probeAsLocalAssignment(valueNode, nameToken.val); |
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245 return SLWriteLocalVariableNodeFactory.create(source.createSection("=", start, length), wrappedNode, frameSlot); |
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246 } |
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247 return SLWriteLocalVariableNodeFactory.create(source.createSection("=", start, length), valueNode, frameSlot); |
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248 } |
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249 |
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250 public SLExpressionNode createRead(Token nameToken) { |
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251 final FrameSlot frameSlot = lexicalScope.locals.get(nameToken.val); |
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252 final SourceSection src = srcFromToken(nameToken); |
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253 if (frameSlot != null) { |
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254 /* Read of a local variable. */ |
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255 return SLReadLocalVariableNodeFactory.create(src, frameSlot); |
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256 } else { |
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257 /* Read of a global name. In our language, the only global names are functions. */ |
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258 return new SLFunctionLiteralNode(src, context.getFunctionRegistry().lookup(nameToken.val)); |
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259 } |
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260 } |
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261 |
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262 public SLExpressionNode createStringLiteral(Token literalToken) { |
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263 /* Remove the trailing and ending " */ |
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264 String literal = literalToken.val; |
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265 assert literal.length() >= 2 && literal.startsWith("\"") && literal.endsWith("\""); |
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266 final SourceSection src = srcFromToken(literalToken); |
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267 literal = literal.substring(1, literal.length() - 1); |
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268 |
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269 return new SLStringLiteralNode(src, literal); |
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270 } |
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271 |
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272 public SLExpressionNode createNumericLiteral(Token literalToken) { |
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273 final SourceSection src = srcFromToken(literalToken); |
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274 try { |
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275 /* Try if the literal is small enough to fit into a long value. */ |
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276 return new SLLongLiteralNode(src, Long.parseLong(literalToken.val)); |
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277 } catch (NumberFormatException ex) { |
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278 /* Overflow of long value, so fall back to BigInteger. */ |
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279 return new SLBigIntegerLiteralNode(src, new BigInteger(literalToken.val)); |
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280 } |
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281 } |
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282 |
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283 public SLExpressionNode createParenExpression(SLExpressionNode expressionNode, int start, int length) { |
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284 final SourceSection src = source.createSection("()", start, length); |
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285 return new SLParenExpressionNode(src, expressionNode); |
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286 } |
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287 |
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288 /** |
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289 * Creates source description of a single token. |
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290 */ |
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291 private SourceSection srcFromToken(Token token) { |
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292 return source.createSection(token.val, token.charPos, token.val.length()); |
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293 } |
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294 |
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295 } |