Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 9393:6a2a9eac243a
Correctly adjust probabilities when swapping if nodes.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 28 Apr 2013 22:58:54 +0200 |
parents | b6a87711eca0 |
children | 71991b7a0f14 |
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Simple Language: A simple dynamic programming language to demonstrate Truffle features
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1 COMPILER SimpleLanguage |
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2 |
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3 CHARACTERS |
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4 |
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5 letter = 'A'..'Z' + 'a'..'z'. |
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6 nonZeroDigit = "123456789". |
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7 digit = "0123456789". |
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8 cr = '\r'. |
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9 lf = '\n'. |
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10 tab = '\t'. |
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11 stringChar = ANY - "\"" - '\\' - cr - lf. |
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12 |
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13 TOKENS |
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14 |
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15 identifier = letter {letter | digit}. |
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16 stringLiteral = "\"" { stringChar } "\"". |
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17 numericLiteral = "0" | nonZeroDigit { digit }. |
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18 |
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19 PRAGMAS |
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20 |
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21 COMMENTS FROM "/*" TO "*/" |
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22 COMMENTS FROM "//" TO lf |
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23 IGNORE cr + lf + tab |
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24 |
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25 PRODUCTIONS |
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26 |
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27 SimpleLanguage |
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28 = |
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29 Function |
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30 { |
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32 } |
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33 . |
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34 |
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35 Function |
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36 = |
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37 "function" (. factory.startFunction(); .) |
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38 identifier (. String name = t.val; .) |
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39 Block<out StatementNode body> (. factory.createFunction(body, name); .) |
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40 . |
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41 |
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42 Block<out StatementNode result> |
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43 = (. List<StatementNode> statements = new ArrayList<>(); .) |
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44 "{" |
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45 { |
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46 Statement<out StatementNode statement> (. statements.add(statement); .) |
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47 } |
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48 "}" (. result = factory.createBlock(statements); .) |
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49 . |
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50 |
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51 Statement<out StatementNode result> |
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52 = (. result = null; .) |
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53 ( |
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54 WhileStatement<out result> |
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55 | |
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56 AssignmentStatement<out result> |
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57 | |
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58 OutputStatement<out result> |
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59 | |
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60 ReturnStatement<out result> |
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61 ) |
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62 . |
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63 |
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64 WhileStatement<out StatementNode result> |
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65 = |
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66 "while" |
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67 "(" |
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68 Expression<out ConditionNode condition> |
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69 ")" |
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70 Block<out StatementNode body> (. result = factory.createWhile(condition, body); .) |
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71 . |
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72 |
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73 AssignmentStatement<out StatementNode result> |
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74 = |
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75 identifier (. String name = t.val; .) |
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76 "=" |
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77 Expression<out TypedNode rvalue> |
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78 ";" (. result = factory.createAssignment(name, rvalue); .) |
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79 . |
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80 |
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81 OutputStatement<out StatementNode result> |
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82 = (. List<TypedNode> expressions = new ArrayList<>(); .) |
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83 "print" |
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84 { |
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85 Expression<out TypedNode value> (. expressions.add(value); .) |
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86 } |
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87 ";" (. result = factory.createPrint(expressions); .) |
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88 . |
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90 ReturnStatement<out StatementNode result> |
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91 = |
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92 "return" |
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93 Expression<out TypedNode value> ";" (. result = factory.createReturn(value); .) |
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94 . |
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95 |
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96 Expression<out TypedNode result> |
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97 = |
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98 ValueExpression<out result> |
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99 [ |
7509 | 100 ("<" | ">" | "<=" | ">=" | "==" | "!=" ) (. String op = t.val; .) |
101 ValueExpression<out TypedNode right> (. result = factory.createBinary(op, result, right); .) | |
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102 ] |
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103 . |
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104 |
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105 ValueExpression<out TypedNode result> |
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106 = |
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107 Term<out result> |
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108 { |
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109 ("+" | "-") (. String op = t.val; .) |
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110 Term<out TypedNode right> (. result = factory.createBinary(op, result, right); .) |
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111 } |
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112 . |
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113 |
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114 Term<out TypedNode result> |
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115 = |
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116 Factor<out result> |
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117 { |
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118 ("*" | "/") (. String op = t.val; .) |
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119 Factor<out TypedNode right> (. result = factory.createBinary(op, result, right); .) |
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120 } |
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121 . |
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122 |
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123 Factor<out TypedNode result> |
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124 = (. result = null; .) |
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125 ( |
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126 TimeRef<out result> |
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127 | |
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128 VariableRef<out result> |
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129 | |
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130 StringLiteral<out result> |
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131 | |
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132 NumericLiteral<out result> |
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133 | |
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134 Ternary<out result> |
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135 | |
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136 "(" Expression<out result> ")" |
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137 ) |
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138 . |
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139 |
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140 Ternary<out TypedNode result> (. TypedNode condition, thenPart, elsePart; .) |
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141 = |
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142 "#" Expression<out condition> "?" Expression<out thenPart> ":" Expression<out elsePart> |
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143 (. result = factory.createTernary(condition, thenPart, elsePart); .) |
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144 . |
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145 |
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146 TimeRef<out TypedNode result> |
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147 = |
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148 "time" (. result = factory.createTime(); .) |
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149 . |
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150 |
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151 VariableRef<out TypedNode result> |
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152 = |
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153 identifier (. result = factory.createLocal(t.val); .) |
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154 . |
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155 |
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156 StringLiteral<out TypedNode result> |
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157 = |
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158 stringLiteral (. result = factory.createStringLiteral(t.val.substring(1, t.val.length() - 1)); .) |
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159 . |
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160 |
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161 NumericLiteral<out TypedNode result> |
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162 = |
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163 numericLiteral (. result = factory.createNumericLiteral(t.val); .) |
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164 . |
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165 |
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166 END SimpleLanguage. |