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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 18411:dc2e000bed40

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SL: add basic support for creating objects and accessing properties
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:02:58 +0100
parents f444ef4684ec
children cfb85e1f4ca5
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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
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24 /*
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25 * This is the grammar of SL that is used to automatically generate the Parser.java and Scanner.java
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26 * files. You can download the parser generator Coco/R from http://ssw.jku.at/coco/. Then run
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27 * "java -jar Coco.jar SimpleLanguage.atg"
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28 */
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29
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30 COMPILER SimpleLanguage
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31
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32 CHARACTERS
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33
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34 letter = 'A'..'Z' + 'a'..'z'.
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35 nonZeroDigit = "123456789".
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36 digit = "0123456789".
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37 cr = '\r'.
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38 lf = '\n'.
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39 tab = '\t'.
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40 stringChar = ANY - "\"" - '\\' - cr - lf.
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41
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42 TOKENS
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43
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44 identifier = letter {letter | digit}.
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45 stringLiteral = "\"" { stringChar } "\"".
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46 numericLiteral = "0" | nonZeroDigit { digit }.
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47
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48 PRAGMAS
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49
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50 COMMENTS FROM "/*" TO "*/"
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51 COMMENTS FROM "//" TO lf
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52 IGNORE cr + lf + tab
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53
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54 PRODUCTIONS
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55
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56
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57 SimpleLanguage
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58 =
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59 Function
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60 {
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61 Function
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62 }
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63 .
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64
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65
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66 Function
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67 =
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68 "function"
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69 identifier (. Token identifierToken = t; .)
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70 "(" (. int bodyStartPos = t.charPos; .)
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71 (. factory.startFunction(identifierToken, bodyStartPos); .)
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72 [
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73 identifier (. factory.addFormalParameter(t); .)
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74 {
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75 ","
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76 identifier (. factory.addFormalParameter(t); .)
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77 }
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78 ]
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79 ")"
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80 Block<out SLStatementNode body, false> (. factory.finishFunction(body); .)
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81 .
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82
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83
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84
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85 Block<out SLStatementNode result, boolean inLoop>
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86 = (. factory.startBlock();
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87 List<SLStatementNode> body = new ArrayList<>(); .)
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88 "{" (. int start = t.charPos; .)
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89 {
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90 Statement<out SLStatementNode s, inLoop> (. body.add(s); .)
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91 }
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92 "}" (. int length = (t.charPos + t.val.length()) - start; .)
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93 (. result = factory.finishBlock(body, start, length); .)
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94 .
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95
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96
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97 Statement<out SLStatementNode result, boolean inLoop>
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98 = (. result = null; .)
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99 (
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100 WhileStatement<out result>
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101 |
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102 "break" (. if (inLoop) { result = factory.createBreak(t); } else { SemErr("break used outside of loop"); } .)
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103 ";"
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104 |
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105 "continue" (. if (inLoop) { result = factory.createContinue(t); } else { SemErr("continue used outside of loop"); } .)
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106 ";"
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107 |
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108 IfStatement<out result, inLoop>
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109 |
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110 ReturnStatement<out result>
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111 |
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112 Expression<out result> ";"
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113 )
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114 .
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115
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116
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117 WhileStatement<out SLStatementNode result>
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118 =
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119 "while" (. Token whileToken = t; .)
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120 "("
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121 Expression<out SLExpressionNode condition>
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122 ")"
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123 Block<out SLStatementNode body, true> (. result = factory.createWhile(whileToken, condition, body); .)
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124 .
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125
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126
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127 IfStatement<out SLStatementNode result, boolean inLoop>
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128 =
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129 "if" (. Token ifToken = t; .)
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130 "("
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131 Expression<out SLExpressionNode condition>
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132 ")"
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133 Block<out SLStatementNode thenPart, inLoop> (. SLStatementNode elsePart = null; .)
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134 [
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135 "else"
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136 Block<out elsePart, inLoop>
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137 ] (. result = factory.createIf(ifToken, condition, thenPart, elsePart); .)
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138 .
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139
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140
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141 ReturnStatement<out SLStatementNode result>
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142 =
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143 "return" (. Token returnToken = t;
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144 SLExpressionNode value = null; .)
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145 [
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146 Expression<out value>
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147 ] (. result = factory.createReturn(returnToken, value); .)
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148 ";"
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149 .
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150
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151
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152 Expression<out SLExpressionNode result>
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153 =
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154 LogicTerm<out result>
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155 {
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156 "||" (. Token op = t; .)
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157 LogicTerm<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .)
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158 }
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159 .
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160
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161
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162 LogicTerm<out SLExpressionNode result>
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163 =
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164 LogicFactor<out result>
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165 {
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166 "&&" (. Token op = t; .)
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167 LogicFactor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .)
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168 }
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169 .
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170
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171
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172 LogicFactor<out SLExpressionNode result>
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173 =
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174 Arithmetic<out result>
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175 [
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176 ("<" | "<=" | ">" | ">=" | "==" | "!=" ) (. Token op = t; .)
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177 Arithmetic<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .)
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178 ]
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179 .
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180
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181
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182 Arithmetic<out SLExpressionNode result>
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183 =
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184 Term<out result>
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185 {
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186 ("+" | "-") (. Token op = t; .)
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187 Term<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .)
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188 }
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189 .
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190
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191
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192 Term<out SLExpressionNode result>
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193 =
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194 Factor<out result>
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195 {
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196 ("*" | "/") (. Token op = t; .)
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197 Factor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .)
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198 }
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199 .
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200
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201
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202 Factor<out SLExpressionNode result>
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203 = (. result = null; .)
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204 (
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205 identifier (. result = factory.createRead(t); .)
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206 [
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207 MemberExpression<out result, result, null, t>
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208 ]
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209 |
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210 stringLiteral (. result = factory.createStringLiteral(t); .)
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211 |
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212 numericLiteral (. result = factory.createNumericLiteral(t); .)
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213 |
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214 "(" (. int start = t.charPos; .)
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215 Expression<out result> (. SLExpressionNode expr = result; .)
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216 ")" (. int length = (t.charPos + t.val.length()) - start; .)
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217 (. result = factory.createParenExpression(expr, start, length); .)
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218 )
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219 .
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220
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221
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222 MemberExpression<out SLExpressionNode result, SLExpressionNode receiver, SLExpressionNode assignmentReceiver, Token assignmentName>
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223 = (. result = null;
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224 Token nestedAssignmentName = null; .)
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225 (
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226 "(" (. List<SLExpressionNode> parameters = new ArrayList<>();
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227 SLExpressionNode parameter; .)
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228 [
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229 Expression<out parameter> (. parameters.add(parameter); .)
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230 {
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231 ","
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232 Expression<out parameter> (. parameters.add(parameter); .)
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233 }
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234 ]
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235 ")" (. Token finalToken = t; .)
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236 (. result = factory.createCall(receiver, parameters, finalToken); .)
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237 |
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238 "="
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239 Expression<out SLExpressionNode value> (. if (assignmentName == null) {
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240 SemErr("invalid assignment target");
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241 } else if (assignmentReceiver == null) {
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242 result = factory.createAssignment(assignmentName, value);
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243 } else {
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244 result = factory.createWriteProperty(assignmentReceiver, assignmentName, value);
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245 } .)
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246 |
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247 "."
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248 identifier
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249 (. result = factory.createReadProperty(receiver, t); .)
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250 (. nestedAssignmentName = t; .)
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251 )
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252 [
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253 MemberExpression<out result, result, receiver, nestedAssignmentName>
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254 ]
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255 .
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256
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257
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258 END SimpleLanguage.