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<?php |
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namespace Vanderlee\Comprehend\Core; |
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use Vanderlee\Comprehend\Parser\Parser; |
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use Vanderlee\Comprehend\Parser\Structure\Choice; |
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use Vanderlee\Comprehend\Parser\Structure\Sequence; |
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use Vanderlee\Comprehend\Parser\Terminal\Char; |
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use Vanderlee\Comprehend\Parser\Terminal\Text; |
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/** |
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* Process arguments |
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* |
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* @author Martijn |
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*/ |
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trait ArgumentsTrait |
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{ |
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/** |
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* Parser array argument |
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* |
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* @param mixed $argument |
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* @param bool $arrayToSequence |
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* @return Parser|Choice|Sequence |
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*/ |
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private static function getArrayArgument($argument, $arrayToSequence) |
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{ |
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if (empty($argument)) { |
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throw new \InvalidArgumentException('Empty array argument'); |
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} |
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if (count($argument) === 1) { |
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return self::getArgument(reset($argument)); |
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} |
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return $arrayToSequence |
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? new Sequence(...$argument) |
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: new Choice(...$argument); |
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} |
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/** |
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* Parse string argument |
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* |
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* @param mixed $argument |
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* @return Char|Text |
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*/ |
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private static function getStringArgument($argument) |
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{ |
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if (strlen($argument) === 0) { |
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throw new \InvalidArgumentException('Empty argument'); |
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} |
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if (strlen($argument) === 1) { |
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return new Char($argument); |
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} |
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return new Text($argument); |
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} |
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/** |
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* Convert the argument to a parser |
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* |
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* @param mixed $argument |
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* @param bool $arrayToSequence if argument is an array, convert to Sequence (`true`) or Choice (`false`) |
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* @return Parser |
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*/ |
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protected static function getArgument($argument, $arrayToSequence = true) |
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{ |
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if (is_array($argument)) { |
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return self::getArrayArgument($argument, $arrayToSequence); |
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} |
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if (is_string($argument)) { |
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return self::getStringArgument($argument); |
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} |
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if (is_int($argument)) { |
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return new Char($argument); |
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} |
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if ($argument instanceof Parser) { |
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return $argument; |
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} |
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throw new \InvalidArgumentException(sprintf('Invalid argument type `%1$s`', |
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is_object($argument) |
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? get_class($argument) |
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: gettype($argument))); |
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} |
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/** |
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* Parse an array of arguments |
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* |
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* @param array $arguments |
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* @param bool $arrayToSequence |
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* @return array |
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*/ |
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protected static function getArguments($arguments, $arrayToSequence = true) |
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{ |
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return array_map(function ($argument) use ($arrayToSequence) { |
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return self::getArgument($argument, $arrayToSequence); |
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}, $arguments); |
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} |
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} |
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vanderlee /
Comprehend
