1 | <?php |
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23 | final class LogicalOperatorProcessor |
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24 | { |
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25 | /** |
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26 | * @var array Of operator precedences & associativity. |
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27 | */ |
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28 | private $operatorPrecedence = [ |
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29 | Token::LOGICAL_OR => [ |
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30 | 'precedence' => 0, |
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31 | 'associativity' => 'left' |
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32 | ], |
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33 | Token::LOGICAL_AND => [ |
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34 | 'precedence' => 1, |
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35 | 'associativity' => 'left' |
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36 | ] |
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37 | ]; |
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38 | |||
39 | /** |
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40 | * Accepts an array of VersionRanges & logical operator tokens & returns a single version range implementing those |
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41 | * constraints. |
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42 | * |
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43 | * @param array $tokenList |
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44 | * |
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45 | * @return VersionRangeInterface |
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46 | */ |
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47 | 3 | public function run(array $tokenList) |
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53 | |||
54 | /** |
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55 | * Accepts an array of ComparatorVersions & logical operators in reverse polish notation & returns a single |
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56 | * instance of a class implementing VersionRangeInterface. |
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57 | * |
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58 | * @param array $resultList |
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59 | * |
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60 | * @return VersionRangeInterface |
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61 | */ |
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62 | 3 | private function buildRanges(array $resultList) |
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90 | |||
91 | /** |
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92 | * Re-order token stream into reverse polish notation. |
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93 | * |
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94 | * @param array $tokenList |
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95 | * |
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96 | * @return array of ComparatorVersions and logical operator tokens |
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97 | */ |
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98 | 3 | private function shuntingYard(array $tokenList) |
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136 | |||
137 | /** |
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138 | * Returns true if we have an operator on the stack. |
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139 | * |
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140 | * @param \SplStack $stack |
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141 | * @return bool |
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142 | */ |
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143 | 3 | private function hasOperator(\SplStack $stack) |
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147 | |||
148 | /** |
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149 | * Returns true if the first operator has lower precedence than the second. |
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150 | * |
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151 | * @param Token $operator1 |
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152 | * @param Token $operator2 |
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153 | * |
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154 | * @return bool |
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155 | */ |
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156 | 1 | private function hasLowerPrecedence(Token $operator1, Token $operator2) |
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166 | } |
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167 |