1 | <?php |
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18 | abstract class BaseExpressionFunction extends ExpressionFunction |
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19 | { |
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20 | |||
21 | /** |
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22 | * @var string |
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23 | */ |
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24 | protected $name; |
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25 | |||
26 | /** |
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27 | * @var callable |
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28 | */ |
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29 | private $compiler; |
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30 | |||
31 | /** |
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32 | * @var callable |
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33 | */ |
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34 | private $evaluator; |
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35 | |||
36 | /** |
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37 | * BaseExpressionFunction constructor. |
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38 | */ |
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39 | final public function __construct() |
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43 | |||
44 | /** |
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45 | * Initialize the ExpressionFunction |
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46 | * |
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47 | * @return void |
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48 | */ |
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49 | abstract protected function init(); |
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50 | |||
51 | /** |
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52 | * @return string |
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53 | */ |
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54 | private function resolveName() : string |
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58 | |||
59 | /** |
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60 | * @return callable A callable able to compile the function |
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61 | */ |
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62 | private function resolveCompiler() : callable |
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66 | |||
67 | /** |
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68 | * @return callable A callable able to evaluate the function |
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69 | */ |
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70 | private function resolveEvaluator() : callable |
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74 | |||
75 | /** |
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76 | * @return callable |
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77 | */ |
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78 | abstract protected function provideCompiler() : callable; |
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79 | |||
80 | /** |
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81 | * @return callable |
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82 | */ |
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83 | abstract protected function provideEvaluator() : callable; |
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84 | |||
85 | /** |
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86 | * @return string |
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87 | */ |
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88 | final public function getName() : string |
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92 | |||
93 | /** |
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94 | * @return callable |
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95 | */ |
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96 | final public function getCompiler() : callable |
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100 | |||
101 | /** |
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102 | * @return callable |
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103 | */ |
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104 | final public function getEvaluator() : callable |
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108 | |||
109 | } |
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110 |