Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SLNodeFactory.java @ 15728:22f56c3eadb7
CodeInstalled not need to assert_leaf_type when asserting abstract_with_unique_concrete_subtype
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Sat, 17 May 2014 14:56:13 +0200 |
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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.*; |
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29 import com.oracle.truffle.api.frame.*; |
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30 import com.oracle.truffle.api.nodes.*; |
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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.local.*; |
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36 import com.oracle.truffle.sl.runtime.*; |
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37 |
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38 /** |
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39 * Helper class used by the SL {@link Parser} to create nodes. The code is factored out of the |
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40 * automatically generated parser to keep the attributed grammar of SL small. |
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41 */ |
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42 public class SLNodeFactory { |
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43 |
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44 /** |
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45 * Local variable names that are visible in the current block. Variables are not visible outside |
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46 * of their defining block, to prevent the usage of undefined variables. Because of that, we can |
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47 * decide during parsing if a name references a local variable or is a function name. |
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48 */ |
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49 static class LexicalScope { |
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50 protected final LexicalScope outer; |
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51 protected final Map<String, FrameSlot> locals; |
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52 |
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53 public LexicalScope(LexicalScope outer) { |
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54 this.outer = outer; |
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55 this.locals = new HashMap<>(); |
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56 if (outer != null) { |
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57 locals.putAll(outer.locals); |
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58 } |
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59 } |
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60 } |
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61 |
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62 /* State while parsing a source unit. */ |
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63 private final SLContext context; |
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64 private final Source source; |
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65 |
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66 /* State while parsing a function. */ |
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67 private String functionName; |
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68 private int parameterCount; |
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69 private FrameDescriptor frameDescriptor; |
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70 private List<SLStatementNode> methodNodes; |
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71 |
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72 /* State while parsing a block. */ |
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73 private LexicalScope lexicalScope; |
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74 |
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75 public SLNodeFactory(SLContext context, Source source) { |
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76 this.context = context; |
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77 this.source = source; |
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78 } |
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79 |
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80 public void startFunction(Token nameToken) { |
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81 assert functionName == null; |
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82 assert parameterCount == 0; |
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83 assert frameDescriptor == null; |
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84 assert lexicalScope == null; |
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85 |
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86 functionName = nameToken.val; |
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87 frameDescriptor = new FrameDescriptor(); |
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88 methodNodes = new ArrayList<>(); |
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89 startBlock(); |
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90 } |
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91 |
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92 public void addFormalParameter(Token nameToken) { |
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93 /* |
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94 * Method parameters are assigned to local variables at the beginning of the method. This |
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95 * ensures that accesses to parameters are specialized the same way as local variables are |
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96 * specialized. |
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97 */ |
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98 SLReadArgumentNode readArg = assignSource(nameToken, new SLReadArgumentNode(parameterCount)); |
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99 methodNodes.add(createAssignment(nameToken, readArg)); |
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100 parameterCount++; |
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101 } |
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102 |
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103 public void finishFunction(SLStatementNode bodyNode) { |
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104 methodNodes.add(bodyNode); |
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105 SLStatementNode methodBlock = finishBlock(methodNodes); |
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106 assert lexicalScope == null : "Wrong scoping of blocks in parser"; |
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107 |
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108 SLFunctionBodyNode functionBodyNode = new SLFunctionBodyNode(methodBlock); |
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109 SLRootNode rootNode = new SLRootNode(frameDescriptor, functionBodyNode, functionName); |
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110 |
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111 context.getFunctionRegistry().register(functionName, rootNode); |
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112 |
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113 functionName = null; |
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114 parameterCount = 0; |
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115 frameDescriptor = null; |
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116 lexicalScope = null; |
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117 } |
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118 |
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119 public void startBlock() { |
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120 lexicalScope = new LexicalScope(lexicalScope); |
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121 } |
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122 |
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123 public SLStatementNode finishBlock(List<SLStatementNode> bodyNodes) { |
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124 lexicalScope = lexicalScope.outer; |
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125 |
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126 List<SLStatementNode> flattenedNodes = new ArrayList<>(bodyNodes.size()); |
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127 flattenBlocks(bodyNodes, flattenedNodes); |
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128 if (flattenedNodes.size() == 1) { |
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129 /* A block containing one other node is unnecessary, we can just that other node. */ |
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130 return flattenedNodes.get(0); |
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131 } else { |
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132 return new SLBlockNode(flattenedNodes.toArray(new SLStatementNode[flattenedNodes.size()])); |
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133 } |
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134 } |
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135 |
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136 private void flattenBlocks(Iterable<? extends Node> bodyNodes, List<SLStatementNode> flattenedNodes) { |
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137 for (Node n : bodyNodes) { |
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138 if (n instanceof SLBlockNode) { |
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139 flattenBlocks(n.getChildren(), flattenedNodes); |
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140 } else { |
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141 flattenedNodes.add((SLStatementNode) n); |
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142 } |
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143 } |
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144 } |
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145 |
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146 public SLStatementNode createBreak(Token t) { |
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147 return assignSource(t, new SLBreakNode()); |
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148 } |
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149 |
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150 public SLStatementNode createContinue(Token t) { |
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151 return assignSource(t, new SLContinueNode()); |
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152 } |
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153 |
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154 public SLStatementNode createWhile(Token t, SLExpressionNode conditionNode, SLStatementNode bodyNode) { |
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155 return assignSource(t, new SLWhileNode(conditionNode, bodyNode)); |
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156 } |
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157 |
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158 public SLStatementNode createIf(Token t, SLExpressionNode conditionNode, SLStatementNode thenPartNode, SLStatementNode elsePartNode) { |
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159 return assignSource(t, new SLIfNode(conditionNode, thenPartNode, elsePartNode)); |
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160 } |
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161 |
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162 public SLStatementNode createReturn(Token t, SLExpressionNode valueNode) { |
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163 return assignSource(t, new SLReturnNode(valueNode)); |
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164 } |
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165 |
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166 public SLExpressionNode createBinary(Token opToken, SLExpressionNode leftNode, SLExpressionNode rightNode) { |
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167 switch (opToken.val) { |
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168 case "+": |
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169 return assignSource(opToken, SLAddNodeFactory.create(leftNode, rightNode)); |
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170 case "*": |
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171 return assignSource(opToken, SLMulNodeFactory.create(leftNode, rightNode)); |
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172 case "/": |
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173 return assignSource(opToken, SLDivNodeFactory.create(leftNode, rightNode)); |
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174 case "-": |
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175 return assignSource(opToken, SLSubNodeFactory.create(leftNode, rightNode)); |
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176 case "<": |
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177 return assignSource(opToken, SLLessThanNodeFactory.create(leftNode, rightNode)); |
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178 case "<=": |
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179 return assignSource(opToken, SLLessOrEqualNodeFactory.create(leftNode, rightNode)); |
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180 case ">": |
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181 return assignSource(opToken, SLLogicalNotNodeFactory.create(assignSource(opToken, SLLessOrEqualNodeFactory.create(leftNode, rightNode)))); |
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182 case ">=": |
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183 return assignSource(opToken, SLLogicalNotNodeFactory.create(assignSource(opToken, SLLessThanNodeFactory.create(leftNode, rightNode)))); |
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184 case "==": |
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185 return assignSource(opToken, SLEqualNodeFactory.create(leftNode, rightNode)); |
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186 case "!=": |
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187 return assignSource(opToken, SLLogicalNotNodeFactory.create(assignSource(opToken, SLEqualNodeFactory.create(leftNode, rightNode)))); |
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188 case "&&": |
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189 return assignSource(opToken, SLLogicalAndNodeFactory.create(leftNode, rightNode)); |
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190 case "||": |
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191 return assignSource(opToken, SLLogicalOrNodeFactory.create(leftNode, rightNode)); |
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192 default: |
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193 throw new RuntimeException("unexpected operation: " + opToken.val); |
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194 } |
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195 } |
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196 |
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197 public SLExpressionNode createCall(Token nameToken, List<SLExpressionNode> parameterNodes) { |
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198 SLExpressionNode functionNode = createRead(nameToken); |
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199 return assignSource(nameToken, SLInvokeNode.create(functionNode, parameterNodes.toArray(new SLExpressionNode[parameterNodes.size()]))); |
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200 } |
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201 |
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202 public SLExpressionNode createAssignment(Token nameToken, SLExpressionNode valueNode) { |
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203 FrameSlot frameSlot = frameDescriptor.findOrAddFrameSlot(nameToken.val); |
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204 lexicalScope.locals.put(nameToken.val, frameSlot); |
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205 return assignSource(nameToken, SLWriteLocalVariableNodeFactory.create(valueNode, frameSlot)); |
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206 } |
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207 |
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208 public SLExpressionNode createRead(Token nameToken) { |
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209 FrameSlot frameSlot = lexicalScope.locals.get(nameToken.val); |
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210 if (frameSlot != null) { |
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211 /* Read of a local variable. */ |
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212 return assignSource(nameToken, SLReadLocalVariableNodeFactory.create(frameSlot)); |
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213 } else { |
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214 /* Read of a global name. In our language, the only global names are functions. */ |
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215 return assignSource(nameToken, new SLFunctionLiteralNode(context.getFunctionRegistry().lookup(nameToken.val))); |
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216 } |
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217 } |
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218 |
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219 public SLExpressionNode createStringLiteral(Token literalToken) { |
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220 /* Remove the trailing and ending " */ |
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221 String literal = literalToken.val; |
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222 assert literal.length() >= 2 && literal.startsWith("\"") && literal.endsWith("\""); |
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223 literal = literal.substring(1, literal.length() - 1); |
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224 |
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225 return assignSource(literalToken, new SLStringLiteralNode(literal)); |
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226 } |
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227 |
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228 public SLExpressionNode createNumericLiteral(Token literalToken) { |
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229 try { |
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230 /* Try if the literal is small enough to fit into a long value. */ |
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231 return assignSource(literalToken, new SLLongLiteralNode(Long.parseLong(literalToken.val))); |
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232 } catch (NumberFormatException ex) { |
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233 /* Overflow of long value, so fall back to BigInteger. */ |
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234 return assignSource(literalToken, new SLBigIntegerLiteralNode(new BigInteger(literalToken.val))); |
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235 } |
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236 } |
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237 |
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238 private <T extends Node> T assignSource(Token t, T node) { |
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239 assert functionName != null; |
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240 assert t != null; |
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241 |
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242 int startLine = t.line; |
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243 int startColumn = t.col; |
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244 int charLength = t.val.length(); |
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245 SourceSection sourceSection = source.createSection(functionName, startLine, startColumn, 0, charLength); |
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246 |
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247 node.assignSourceSection(sourceSection); |
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248 return node; |
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249 } |
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250 } |