Complex classes like Generator often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Generator, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types=1); |
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| 5 | class Generator |
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| 6 | { |
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| 7 | /** Single quote for string value **/ |
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| 8 | const QUOTE_SINGLE = "'"; |
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| 9 | |||
| 10 | /** Double quote for string value **/ |
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| 11 | const QUOTE_DOUBLE = '"'; |
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| 12 | |||
| 13 | /** No quote for string heredoc value **/ |
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| 14 | const QUOTE_NO = ''; |
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| 15 | |||
| 16 | |||
| 17 | /** @var string Generated code */ |
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| 18 | public $code = ''; |
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| 19 | |||
| 20 | /** @var integer Level of code line tabbing for new lines */ |
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| 21 | public $tabs = 0; |
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| 22 | |||
| 23 | /** @var string Current class name */ |
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| 24 | public $class; |
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| 25 | |||
| 26 | /** @var int Current conditions nesting level */ |
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| 27 | public $ifConditionLevel = 0; |
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| 28 | |||
| 29 | /** |
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| 30 | * Add simple text to current code position |
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| 31 | * @param string $text Text to add |
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| 32 | * @return self |
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| 33 | */ |
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| 34 | public function text($text = '') |
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| 40 | |||
| 41 | /** |
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| 42 | * Add current tabbing level to current line. |
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| 43 | * |
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| 44 | * @param string $endText Text to add after tabs |
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| 45 | * @param integer $tabs Amount of tabs to add |
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| 46 | * @param string $startText Text to add before tabs |
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| 47 | * @return Generator Chaining |
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| 48 | */ |
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| 49 | public function tabs($endText = '', $tabs = null, $startText = '') |
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| 59 | |||
| 60 | /** |
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| 61 | * Increase current code indentation. |
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| 62 | * |
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| 63 | * @param int $amount Indentation amount |
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| 64 | * |
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| 65 | * @return $this Chaining |
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| 66 | */ |
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| 67 | public function increaseIndentation($amount = 1) |
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| 73 | |||
| 74 | /** |
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| 75 | * Reduce current code indentation. |
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| 76 | * |
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| 77 | * @param int $amount Indentation amount |
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| 78 | * |
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| 79 | * @return $this Chaining |
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| 80 | */ |
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| 81 | public function decreaseIndentation($amount = 1) |
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| 87 | |||
| 88 | /** |
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| 89 | * Add new line to code. |
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| 90 | * |
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| 91 | * @param string $text Code to add to new line |
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| 92 | * @param integer $tabs Tabs count |
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| 93 | * @return self |
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| 94 | */ |
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| 95 | public function newLine($text = '', $tabs = null) |
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| 104 | |||
| 105 | /** |
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| 106 | * Add single line comment to code |
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| 107 | * @param string $text Comment text |
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| 108 | * @return self Chaining |
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| 109 | */ |
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| 110 | public function comment($text = '') |
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| 114 | |||
| 115 | /** |
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| 116 | * Add multi-line comment. If array with one line is passed |
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| 117 | * we create special syntax comment in one line, usually |
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| 118 | * used for class variable definition in more compact form. |
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| 119 | * |
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| 120 | * @param array $lines Array of comments lines |
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| 121 | * @return self Chaining |
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| 122 | */ |
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| 123 | public function multiComment(array $lines = array()) |
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| 146 | |||
| 147 | /** |
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| 148 | * Add one line variable definition comment. |
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| 149 | * |
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| 150 | * @param string $type Variable typeHint |
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| 151 | * @param string $description Variable description |
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| 152 | * @param string $name Variable name |
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| 153 | * @return self Chaining |
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| 154 | */ |
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| 155 | public function commentVar($type, $description, $name = '') |
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| 161 | |||
| 162 | /** |
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| 163 | * Add string value definition. |
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| 164 | * |
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| 165 | * @param string $value String value to add |
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| 166 | * @param string $tabs Tabs count |
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| 167 | * @param string $quote Type of quote |
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| 168 | * @return self Chaining |
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| 169 | */ |
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| 170 | public function stringValue($value, $tabs = null, $quote = self::QUOTE_SINGLE) |
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| 174 | |||
| 175 | /** |
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| 176 | * Add array values definition. |
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| 177 | * |
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| 178 | * @param array $items Array key-value pairs collection |
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| 179 | * @return self Chaining |
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| 180 | */ |
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| 181 | public function arrayValue(array $items = array()) |
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| 208 | |||
| 209 | /** |
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| 210 | * Add variable definition with array merging. |
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| 211 | * |
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| 212 | * @param string $name Variable name |
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| 213 | * @param array $value Array of key-value items for merging it to other array |
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| 214 | * @param string $arrayName Name of array to merge to, if no is specified - $name is used |
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| 215 | * @return self Chaining |
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| 216 | */ |
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| 217 | public function defArrayMerge($name, array $value, $arrayName = null) |
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| 226 | |||
| 227 | /** |
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| 228 | * Add variable definition. |
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| 229 | * |
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| 230 | * @param string $name Variable name |
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| 231 | * @param mixed $value Variable default value |
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| 232 | * @param string $after String to insert after variable definition |
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| 233 | * @param string $end Closing part of variable definition |
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| 234 | * @param string $quote Type of quote |
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| 235 | * @return Generator Chaining |
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| 236 | */ |
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| 237 | public function defVar($name, $value = null, $after = ' = ', $end = ';', $quote = self::QUOTE_SINGLE) |
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| 268 | |||
| 269 | /** |
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| 270 | * Add trait definition. |
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| 271 | * |
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| 272 | * @param string $name Trait name |
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| 273 | * @return self Chaining |
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| 274 | */ |
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| 275 | public function defTrait($name) |
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| 295 | |||
| 296 | /** |
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| 297 | * Add class definition. |
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| 298 | * |
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| 299 | * @param string $name Class name |
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| 300 | * @param string $extends Parent class name |
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| 301 | * @param array $implements Interfaces names collection |
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| 302 | * @return self Chaining |
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| 303 | */ |
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| 304 | public function defClass($name, $extends = null, array $implements = array()) |
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| 334 | |||
| 335 | /** |
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| 336 | * Close current class context. |
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| 337 | * |
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| 338 | * @return self Chaining |
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| 339 | */ |
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| 340 | public function endClass() |
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| 349 | |||
| 350 | /** |
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| 351 | * Define if statement condition. |
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| 352 | * |
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| 353 | * @param string $condition Condition statement |
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| 354 | * @return self Chaining |
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| 355 | */ |
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| 356 | public function defIfCondition($condition) |
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| 365 | |||
| 366 | /** |
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| 367 | * Define elseif statement condition. |
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| 368 | * |
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| 369 | * @param string $condition Condition statement |
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| 370 | * @return self Chaining |
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| 371 | */ |
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| 372 | public function defElseIfCondition($condition) |
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| 380 | |||
| 381 | /** |
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| 382 | * Define else statement. |
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| 383 | * |
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| 384 | * @return self Chaining |
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| 385 | */ |
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| 386 | public function defElseCondition() |
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| 394 | |||
| 395 | /** |
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| 396 | * Close if condition statement. |
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| 397 | * |
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| 398 | * @return self Chaining |
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| 399 | */ |
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| 400 | public function endIfCondition() |
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| 411 | |||
| 412 | /** |
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| 413 | * Add class variable definition. |
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| 414 | * |
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| 415 | * @param string $name Variable name |
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| 416 | * @param string $visibility Variable accessibility level |
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| 417 | * @param mixed $value Variable default value |
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| 418 | * @return self Chaining |
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| 419 | */ |
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| 420 | public function defClassVar($name, $visibility = 'public', $value = null) |
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| 428 | |||
| 429 | /** |
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| 430 | * Add class constant definition. |
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| 431 | * |
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| 432 | * @param string $name Constant name |
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| 433 | * @param string $value Variable default value |
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| 434 | * @return self Chaining |
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| 435 | */ |
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| 436 | public function defClassConst($name, $value) |
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| 440 | |||
| 441 | /** |
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| 442 | * Write file to disk |
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| 443 | * @param string $name Path to file |
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| 444 | * @param string $format Output file format |
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| 445 | */ |
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| 446 | public function write($name, $format = 'php') |
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| 456 | |||
| 457 | /** |
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| 458 | * Flush internal data and return it. |
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| 459 | * |
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| 460 | * @return string Current generated code |
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| 461 | */ |
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| 462 | public function flush() |
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| 473 | |||
| 474 | /** |
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| 475 | * Add class function definition. |
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| 476 | * |
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| 477 | * @param string $name Class function name |
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| 478 | * @param string $visibility Class function visibility |
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| 479 | * @param array $parameters Class function arguments |
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| 480 | * |
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| 481 | * @return $this Chaining |
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| 482 | * |
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| 483 | * @throws \InvalidArgumentException |
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| 484 | */ |
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| 485 | public function defClassFunction(string $name, string $visibility = 'public', array $parameters = [], $comments = []) |
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| 495 | |||
| 496 | /** |
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| 497 | * Close class function definition. |
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| 498 | * |
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| 499 | * @return $this Chaining |
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| 500 | */ |
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| 501 | public function endClassFunction() |
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| 507 | |||
| 508 | /** |
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| 509 | * Add function definition. |
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| 510 | * |
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| 511 | * @param string $name Function name |
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| 512 | * @param array $parameters Collection of parameters $typeHint => $paramName |
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| 513 | * @param string $prefix Function prefix |
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| 514 | * |
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| 515 | * @return Generator Chaining |
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| 516 | */ |
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| 517 | public function defFunction($name, array $parameters = [], $prefix = '', $comments = []) |
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| 537 | |||
| 538 | /** |
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| 539 | * Close current function context. |
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| 540 | * |
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| 541 | * @return self Chaining |
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| 542 | */ |
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| 543 | public function endFunction() |
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| 549 | |||
| 550 | /** |
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| 551 | * Constructor |
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| 552 | * @param string $namespace Code namespace |
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| 553 | */ |
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| 554 | public function __construct($namespace = null) |
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| 561 | |||
| 562 | /** |
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| 563 | * Add namespace declaration. |
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| 564 | * |
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| 565 | * @param string $name Namespace name |
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| 566 | * |
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| 567 | * @return $this Chaining |
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| 568 | */ |
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| 569 | public function defNamespace($name) |
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| 577 | } |
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| 578 | //[PHPCOMPRESSOR(remove,end)] |
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| 579 |