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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 16675:0fc43b066eee

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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>
date Fri, 01 Aug 2014 16:30:22 -0700
parents abe7128ca473
children d654cd5ed05a
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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 (. 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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110 |
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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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150
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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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232 )
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233 .
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234
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235
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236 END SimpleLanguage.