Esempio n. 1
0
 /**
  * Concatenates one or more foreach-able object into an Iterator.
  * If no objects provided, returns an empty iterator.
  * \AppendIterators provided will be deep copied.
  * 		This means changes to \AppendIterator parameters will not be reflected
  * 		in the resulting \Iterator.
  * @return \Iterator
  */
 public static function concat()
 {
     $argCount = \func_num_args();
     if ($argCount === 0) {
         return new \EmptyIterator();
     } elseif ($argCount === 1) {
         return Iterators::ensureIsIterator(\func_get_args()[0]);
     } else {
         $retval = new \AppendIterator();
         //Workaround for AppendIterator bugs
         //https://bugs.php.net/bug.php?id=49104
         //https://bugs.php.net/bug.php?id=62212
         $retval->append(new \ArrayIterator([0]));
         unset($retval->getArrayIterator()[0]);
         $recursiveAttach = static function ($iter) use(&$recursiveAttach, $retval) {
             foreach ($iter as $concatedIter) {
                 if ($concatedIter instanceof \AppendIterator) {
                     $recursiveAttach($concatedIter->getArrayIterator());
                 } elseif ($concatedIter instanceof \EmptyIterator) {
                     //Do not add it.
                 } else {
                     $retval->append($concatedIter);
                 }
             }
             return $retval;
         };
         return (new \Yasca\Core\FunctionPipe())->wrap(\func_get_args())->pipe([Iterators::_class, 'ensureIsIterator'])->pipe([Iterators::_class, 'select'], [Iterators::_class, 'ensureIsIterator'])->pipe($recursiveAttach)->unwrap();
     }
 }
	public function from($values){
		if ($this->iterator === null){
			$this->iterator = Iterators::ensureIsIterator($values);

			//TODO: More intelligent handling of RecursiveIterators
			if ($this->iterator instanceof \RecursiveIterator){
				$this->iterator = new \RecursiveIteratorIterator($this->iterator);
			}
		} else {
			throw new IteratorException('Iterator already assigned');
		}
		return $this;
	}