Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 13821:b16ec83edc73
Documentation and more refactoring of Simple Language
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Wed, 29 Jan 2014 20:45:43 -0800 |
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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 COMPILER SimpleLanguage |
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25 |
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26 CHARACTERS |
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27 |
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28 letter = 'A'..'Z' + 'a'..'z'. |
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29 nonZeroDigit = "123456789". |
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30 digit = "0123456789". |
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31 cr = '\r'. |
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32 lf = '\n'. |
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33 tab = '\t'. |
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34 stringChar = ANY - "\"" - '\\' - cr - lf. |
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35 |
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36 TOKENS |
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37 |
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38 identifier = letter {letter | digit}. |
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39 stringLiteral = "\"" { stringChar } "\"". |
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40 numericLiteral = "0" | nonZeroDigit { digit }. |
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41 |
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42 PRAGMAS |
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43 |
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44 COMMENTS FROM "/*" TO "*/" |
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45 COMMENTS FROM "//" TO lf |
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46 IGNORE cr + lf + tab |
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47 |
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48 PRODUCTIONS |
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49 |
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50 |
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51 SimpleLanguage |
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52 = |
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53 Function |
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54 { |
7509 | 55 Function |
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56 } |
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57 . |
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58 |
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59 |
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60 Function |
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61 = |
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62 "function" |
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63 identifier (. factory.startFunction(t); .) |
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64 "(" |
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65 [ |
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66 identifier (. factory.addFormalParameter(t); .) |
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67 { |
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68 "," |
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69 identifier (. factory.addFormalParameter(t); .) |
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70 } |
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71 ] |
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72 ")" |
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73 Block<out SLStatementNode body> (. factory.finishFunction(body); .) |
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74 . |
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75 |
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76 |
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77 |
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78 Block<out SLStatementNode result> |
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79 = (. factory.startBlock(); |
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80 List<SLStatementNode> body = new ArrayList<>(); .) |
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81 "{" |
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82 { |
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83 Statement<out SLStatementNode s> (. body.add(s); .) |
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84 } |
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85 "}" (. result = factory.finishBlock(body); .) |
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86 . |
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87 |
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88 |
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89 Statement<out SLStatementNode result> |
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90 = (. result = null; .) |
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91 ( |
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92 WhileStatement<out result> |
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93 | |
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94 "break" (. result = factory.createBreak(t); .) |
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95 ";" |
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96 | |
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97 "continue" (. result = factory.createContinue(t); .) |
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98 ";" |
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99 | |
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100 IfStatement<out result> |
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101 | |
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102 ReturnStatement<out result> |
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103 | |
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104 Expression<out result> ";" |
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105 ) |
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106 . |
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107 |
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108 |
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109 WhileStatement<out SLStatementNode result> |
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110 = |
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111 "while" |
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112 "(" (. Token whileToken = t; .) |
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113 Expression<out SLExpressionNode condition> |
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114 ")" |
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115 Block<out SLStatementNode body> (. result = factory.createWhile(whileToken, condition, body); .) |
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116 . |
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117 |
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118 |
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119 IfStatement<out SLStatementNode result> |
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120 = |
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121 "if" |
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122 "(" (. Token ifToken = t; .) |
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123 Expression<out SLExpressionNode condition> |
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124 ")" |
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125 Block<out SLStatementNode thenPart> (. SLStatementNode elsePart = null; .) |
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126 [ |
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127 "else" |
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128 Block<out elsePart> |
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129 ] (. result = factory.createIf(ifToken, condition, thenPart, elsePart); .) |
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130 . |
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131 |
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132 |
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133 ReturnStatement<out SLStatementNode result> |
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134 = |
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135 "return" (. Token returnToken = t; |
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136 SLExpressionNode value = null; .) |
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137 [ |
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138 Expression<out value> |
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139 ] (. result = factory.createReturn(returnToken, value); .) |
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140 ";" |
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141 . |
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142 |
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144 Expression<out SLExpressionNode result> |
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145 = |
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146 LogicTerm<out result> |
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147 { |
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148 "||" (. Token op = t; .) |
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149 LogicTerm<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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150 } |
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151 . |
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152 |
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153 |
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154 LogicTerm<out SLExpressionNode result> |
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155 = |
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156 LogicFactor<out result> |
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157 { |
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158 "&&" (. Token op = t; .) |
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159 LogicFactor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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160 } |
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161 . |
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162 |
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163 |
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164 LogicFactor<out SLExpressionNode result> |
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165 = |
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166 Arithmetic<out result> |
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167 [ |
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168 ("<" | "<=" | ">" | ">=" | "==" | "!=" ) (. Token op = t; .) |
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169 Arithmetic<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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170 ] |
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171 . |
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172 |
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173 |
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174 Arithmetic<out SLExpressionNode result> |
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175 = |
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176 Term<out result> |
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177 { |
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178 ("+" | "-") (. Token op = t; .) |
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179 Term<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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180 } |
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181 . |
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182 |
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183 |
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184 Term<out SLExpressionNode result> |
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185 = |
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186 Factor<out result> |
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187 { |
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188 ("*" | "/") (. Token op = t; .) |
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189 Factor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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190 } |
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191 . |
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192 |
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193 |
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194 Factor<out SLExpressionNode result> |
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195 = (. result = null; .) |
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196 ( |
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197 identifier (. Token nameToken = t; .) |
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198 ( |
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199 "(" (. List<SLExpressionNode> parameters = new ArrayList<>(); |
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200 SLExpressionNode parameter; .) |
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201 [ |
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202 Expression<out parameter> (. parameters.add(parameter); .) |
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203 { |
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204 "," |
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205 Expression<out parameter> (. parameters.add(parameter); .) |
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206 } |
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207 ] (. result = factory.createCall(nameToken, parameters); .) |
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208 ")" |
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209 | |
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210 "=" |
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211 Expression<out SLExpressionNode value> (. result = factory.createAssignment(nameToken, value); .) |
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212 | |
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213 (. result = factory.createRead(nameToken); .) |
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214 ) |
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215 | |
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216 stringLiteral (. result = factory.createStringLiteral(t); .) |
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217 | |
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218 numericLiteral (. result = factory.createNumericLiteral(t); .) |
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219 | |
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220 "(" Expression<out result> ")" |
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221 ) |
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222 . |
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223 |
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224 |
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225 END SimpleLanguage. |