Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 16675:0fc43b066eee
SL/SourceAttribution: correct some omissions, and in particular add new node SLParenExpressionNode to represent a parenthesized expression; this is semantically neutral of course, but needed to account correctly for the text of such an expression (as opposed to its contents).
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Fri, 01 Aug 2014 16:30:22 -0700 |
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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 { |
7509 | 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 (. factory.startFunction(t); .) |
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70 "(" |
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71 [ |
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72 identifier (. factory.addFormalParameter(t); .) |
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73 { |
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74 "," |
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75 identifier (. factory.addFormalParameter(t); .) |
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76 } |
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77 ] |
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78 ")" |
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79 Block<out SLStatementNode body, false> (. factory.finishFunction(body); .) |
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80 . |
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81 |
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82 |
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83 |
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84 Block<out SLStatementNode result, boolean inLoop> |
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85 = (. factory.startBlock(); |
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86 List<SLStatementNode> body = new ArrayList<>(); .) |
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87 "{" (. int start = t.charPos; .) |
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88 { |
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89 Statement<out SLStatementNode s, inLoop> (. body.add(s); .) |
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90 } |
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91 "}" (. int length = (t.charPos + t.val.length()) - start; .) |
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92 (. result = factory.finishBlock(body, start, length); .) |
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93 . |
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94 |
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95 |
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96 Statement<out SLStatementNode result, boolean inLoop> |
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97 = (. result = null; .) |
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98 ( |
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99 WhileStatement<out result> |
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100 | |
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101 "break" (. if (inLoop) { result = factory.createBreak(t); } else { SemErr("break used outside of loop"); } .) |
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102 ";" |
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103 | |
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104 "continue" (. if (inLoop) { result = factory.createContinue(t); } else { SemErr("continue used outside of loop"); } .) |
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105 ";" |
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106 | |
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107 IfStatement<out result, inLoop> |
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108 | |
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109 ReturnStatement<out result> |
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111 Expression<out result> ";" |
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112 ) |
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113 . |
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114 |
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115 |
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116 WhileStatement<out SLStatementNode result> |
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117 = |
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118 "while" (. Token whileToken = t; .) |
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119 "(" |
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120 Expression<out SLExpressionNode condition> |
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121 ")" |
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122 Block<out SLStatementNode body, true> (. result = factory.createWhile(whileToken, condition, body); .) |
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123 . |
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124 |
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125 |
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126 IfStatement<out SLStatementNode result, boolean inLoop> |
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127 = |
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128 "if" |
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129 "(" (. Token ifToken = t; .) |
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130 Expression<out SLExpressionNode condition> |
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131 ")" |
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132 Block<out SLStatementNode thenPart, inLoop> (. SLStatementNode elsePart = null; .) |
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133 [ |
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134 "else" |
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135 Block<out elsePart, inLoop> |
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136 ] (. result = factory.createIf(ifToken, condition, thenPart, elsePart); .) |
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137 . |
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138 |
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139 |
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140 ReturnStatement<out SLStatementNode result> |
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141 = |
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142 "return" (. Token returnToken = t; |
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143 SLExpressionNode value = null; .) |
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144 [ |
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145 Expression<out value> |
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146 ] (. result = factory.createReturn(returnToken, value); .) |
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147 ";" |
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148 . |
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149 |
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151 Expression<out SLExpressionNode result> |
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152 = |
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153 LogicTerm<out result> |
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154 { |
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155 "||" (. Token op = t; .) |
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156 LogicTerm<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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157 } |
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158 . |
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159 |
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160 |
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161 LogicTerm<out SLExpressionNode result> |
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162 = |
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163 LogicFactor<out result> |
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164 { |
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165 "&&" (. Token op = t; .) |
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166 LogicFactor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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167 } |
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168 . |
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169 |
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170 |
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171 LogicFactor<out SLExpressionNode result> |
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172 = |
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173 Arithmetic<out result> |
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174 [ |
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175 ("<" | "<=" | ">" | ">=" | "==" | "!=" ) (. Token op = t; .) |
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176 Arithmetic<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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177 ] |
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178 . |
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179 |
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180 |
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181 Arithmetic<out SLExpressionNode result> |
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182 = |
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183 Term<out result> |
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184 { |
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185 ("+" | "-") (. Token op = t; .) |
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186 Term<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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187 } |
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188 . |
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189 |
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190 |
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191 Term<out SLExpressionNode result> |
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192 = |
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193 Factor<out result> |
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194 { |
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195 ("*" | "/") (. Token op = t; .) |
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196 Factor<out SLExpressionNode right> (. result = factory.createBinary(op, result, right); .) |
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197 } |
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198 . |
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199 |
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200 |
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201 Factor<out SLExpressionNode result> |
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202 = (. result = null; .) |
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203 ( |
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204 identifier (. Token nameToken = t; .) |
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205 ( |
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206 "(" (. List<SLExpressionNode> parameters = new ArrayList<>(); |
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207 SLExpressionNode parameter; .) |
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208 [ |
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209 Expression<out parameter> (. parameters.add(parameter); .) |
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210 { |
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211 "," |
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212 Expression<out parameter> (. parameters.add(parameter); .) |
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213 } |
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214 ] |
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215 ")" (. Token finalToken = t; .) |
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216 (. result = factory.createCall(nameToken, parameters, finalToken); .) |
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217 | |
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218 "=" |
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219 Expression<out SLExpressionNode value> (. result = factory.createAssignment(nameToken, value); .) |
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220 | |
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221 (. result = factory.createRead(nameToken); .) |
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222 ) |
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223 | |
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224 stringLiteral (. result = factory.createStringLiteral(t); .) |
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225 | |
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226 numericLiteral (. result = factory.createNumericLiteral(t); .) |
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227 | |
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228 "(" (. int start = t.charPos; .) |
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229 Expression<out result> (. SLExpressionNode expr = result; .) |
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230 ")" (. int length = (t.charPos + t.val.length()) - start; .) |
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231 (. result = factory.createParenExpression(expr, start, length); .) |
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698cd036a1ca
Added a ternary operator to simple language to test short circuit specialization.
Christian Humer <christian.humer@gmail.com>
parents:
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232 ) |
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213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
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233 . |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
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234 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
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235 |
213c1297a814
Simple Language: A simple dynamic programming language to demonstrate Truffle features
Christian Wimmer <christian.wimmer@oracle.com>
parents:
diff
changeset
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236 END SimpleLanguage. |