sop / asn1

lib/ASN1/Type/Primitive/BMPString.php

Indentation +23 added lines, -23 removed lines

@@ -15,29 +15,29 @@
  */
 class BMPString extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_BMP_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_BMP_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        // UCS-2 has fixed with of 2 octets (16 bits)
-        if (strlen($string) % 2 !== 0) {
-            return false;
-        }
-        return true;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		// UCS-2 has fixed with of 2 octets (16 bits)
+		if (strlen($string) % 2 !== 0) {
+			return false;
+		}
+		return true;
+	}
 }

lib/ASN1/Type/Primitive/UniversalString.php

Indentation +23 added lines, -23 removed lines

@@ -14,29 +14,29 @@
  */
 class UniversalString extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_UNIVERSAL_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_UNIVERSAL_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        // UCS-4 has fixed with of 4 octets (32 bits)
-        if (strlen($string) % 4 != 0) {
-            return false;
-        }
-        return true;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		// UCS-4 has fixed with of 4 octets (32 bits)
+		if (strlen($string) % 4 != 0) {
+			return false;
+		}
+		return true;
+	}
 }

lib/ASN1/Type/Primitive/UTF8String.php

Indentation +19 added lines, -19 removed lines

@@ -14,25 +14,25 @@
  */
 class UTF8String extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_UTF8_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_UTF8_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        return mb_check_encoding($string, "UTF-8");
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		return mb_check_encoding($string, "UTF-8");
+	}
 }

lib/ASN1/Type/Primitive/T61String.php

Indentation +21 added lines, -21 removed lines

@@ -12,27 +12,27 @@
  */
 class T61String extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_T61_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_T61_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        // allow everything since there's literally
-        // thousands of allowed characters (16 bit composed characters)
-        return true;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		// allow everything since there's literally
+		// thousands of allowed characters (16 bit composed characters)
+		return true;
+	}
 }

lib/ASN1/Type/Primitive/VisibleString.php

Indentation +19 added lines, -19 removed lines

@@ -12,25 +12,25 @@
  */
 class VisibleString extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_VISIBLE_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_VISIBLE_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        return preg_match('/[^\x20-\x7e]/', $string) == 0;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		return preg_match('/[^\x20-\x7e]/', $string) == 0;
+	}
 }

lib/ASN1/Type/Primitive/ObjectDescriptor.php

Indentation +20 added lines, -20 removed lines

@@ -12,26 +12,26 @@
  */
 class ObjectDescriptor extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $descriptor
-     */
-    public function __construct(string $descriptor)
-    {
-        $this->_string = $descriptor;
-        $this->_typeTag = self::TYPE_OBJECT_DESCRIPTOR;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $descriptor
+	 */
+	public function __construct(string $descriptor)
+	{
+		$this->_string = $descriptor;
+		$this->_typeTag = self::TYPE_OBJECT_DESCRIPTOR;
+	}
     
-    /**
-     * Get the object descriptor.
-     *
-     * @return string
-     */
-    public function descriptor(): string
-    {
-        return $this->_string;
-    }
+	/**
+	 * Get the object descriptor.
+	 *
+	 * @return string
+	 */
+	public function descriptor(): string
+	{
+		return $this->_string;
+	}
 }

lib/ASN1/Type/Primitive/NumericString.php

Indentation +19 added lines, -19 removed lines

@@ -12,25 +12,25 @@
  */
 class NumericString extends PrimitiveString
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Constructor.
-     *
-     * @param string $string
-     */
-    public function __construct(string $string)
-    {
-        $this->_typeTag = self::TYPE_NUMERIC_STRING;
-        parent::__construct($string);
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param string $string
+	 */
+	public function __construct(string $string)
+	{
+		$this->_typeTag = self::TYPE_NUMERIC_STRING;
+		parent::__construct($string);
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected function _validateString(string $string): bool
-    {
-        return preg_match('/[^0-9 ]/', $string) == 0;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected function _validateString(string $string): bool
+	{
+		return preg_match('/[^0-9 ]/', $string) == 0;
+	}
 }

lib/ASN1/Type/TaggedType.php

Spacing +1 added lines, -1 removed lines

@@ -22,7 +22,7 @@
      * {@inheritdoc}
      */
     protected static function _decodeFromDER(Identifier $identifier, string $data,
-        int &$offset): ElementBase
+        int & $offset): ElementBase
     {
         $idx = $offset;
         $type = new DERTaggedType($identifier, $data, $idx);

Indentation +77 added lines, -77 removed lines

@@ -17,85 +17,85 @@
  */
 abstract class TaggedType extends Element
 {
-    /**
-     *
-     * {@inheritdoc}
-     */
-    protected static function _decodeFromDER(Identifier $identifier, string $data,
-        int &$offset): ElementBase
-    {
-        $idx = $offset;
-        $type = new DERTaggedType($identifier, $data, $idx);
-        $length = Length::expectFromDER($data, $idx)->intLength();
-        $offset = $idx + $length;
-        return $type;
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 */
+	protected static function _decodeFromDER(Identifier $identifier, string $data,
+		int &$offset): ElementBase
+	{
+		$idx = $offset;
+		$type = new DERTaggedType($identifier, $data, $idx);
+		$length = Length::expectFromDER($data, $idx)->intLength();
+		$offset = $idx + $length;
+		return $type;
+	}
     
-    /**
-     * Check whether element supports explicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return ExplicitTagging
-     */
-    public function expectExplicit($expectedTag = null): ExplicitTagging
-    {
-        $el = $this;
-        if (!$el instanceof ExplicitTagging) {
-            throw new \UnexpectedValueException(
-                "Element doesn't implement explicit tagging.");
-        }
-        if (isset($expectedTag)) {
-            $el->expectTagged($expectedTag);
-        }
-        return $el;
-    }
+	/**
+	 * Check whether element supports explicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return ExplicitTagging
+	 */
+	public function expectExplicit($expectedTag = null): ExplicitTagging
+	{
+		$el = $this;
+		if (!$el instanceof ExplicitTagging) {
+			throw new \UnexpectedValueException(
+				"Element doesn't implement explicit tagging.");
+		}
+		if (isset($expectedTag)) {
+			$el->expectTagged($expectedTag);
+		}
+		return $el;
+	}
     
-    /**
-     * Get the wrapped inner element employing explicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function asExplicit($expectedTag = null): UnspecifiedType
-    {
-        return $this->expectExplicit($expectedTag)->explicit();
-    }
+	/**
+	 * Get the wrapped inner element employing explicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function asExplicit($expectedTag = null): UnspecifiedType
+	{
+		return $this->expectExplicit($expectedTag)->explicit();
+	}
     
-    /**
-     * Check whether element supports implicit tagging.
-     *
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return ImplicitTagging
-     */
-    public function expectImplicit($expectedTag = null): ImplicitTagging
-    {
-        $el = $this;
-        if (!$el instanceof ImplicitTagging) {
-            throw new \UnexpectedValueException(
-                "Element doesn't implement implicit tagging.");
-        }
-        if (isset($expectedTag)) {
-            $el->expectTagged($expectedTag);
-        }
-        return $el;
-    }
+	/**
+	 * Check whether element supports implicit tagging.
+	 *
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return ImplicitTagging
+	 */
+	public function expectImplicit($expectedTag = null): ImplicitTagging
+	{
+		$el = $this;
+		if (!$el instanceof ImplicitTagging) {
+			throw new \UnexpectedValueException(
+				"Element doesn't implement implicit tagging.");
+		}
+		if (isset($expectedTag)) {
+			$el->expectTagged($expectedTag);
+		}
+		return $el;
+	}
     
-    /**
-     * Get the wrapped inner element employing implicit tagging.
-     *
-     * @param int $tag Type tag of the inner element
-     * @param int|null $expectedTag Optional outer tag expectation
-     * @param int $expectedClass Optional inner type class expectation
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function asImplicit(int $tag, $expectedTag = null,
-        int $expectedClass = Identifier::CLASS_UNIVERSAL): UnspecifiedType
-    {
-        return $this->expectImplicit($expectedTag)->implicit($tag,
-            $expectedClass);
-    }
+	/**
+	 * Get the wrapped inner element employing implicit tagging.
+	 *
+	 * @param int $tag Type tag of the inner element
+	 * @param int|null $expectedTag Optional outer tag expectation
+	 * @param int $expectedClass Optional inner type class expectation
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function asImplicit(int $tag, $expectedTag = null,
+		int $expectedClass = Identifier::CLASS_UNIVERSAL): UnspecifiedType
+	{
+		return $this->expectImplicit($expectedTag)->implicit($tag,
+			$expectedClass);
+	}
 }

lib/ASN1/Type/Structure.php

Spacing +2 added lines, -2 removed lines

@@ -91,7 +91,7 @@ 
      * @return self
      */
     protected static function _decodeFromDER(Identifier $identifier, string $data,
-        int &$offset): ElementBase
+        int & $offset): ElementBase
     {
         $idx = $offset;
         if (!$identifier->isConstructed()) {
@@ -236,7 +236,7 @@ 
     {
         if (!isset($this->_unspecifiedTypes)) {
             $this->_unspecifiedTypes = array_map(
-                function (Element $el) {
+                function(Element $el) {
                     return new UnspecifiedType($el);
                 }, $this->_elements);
         }

Indentation +310 added lines, -310 removed lines

@@ -14,336 +14,336 @@
  * Base class for the constructed types.
  */
 abstract class Structure extends Element implements 
-    \Countable,
-    \IteratorAggregate
+	\Countable,
+	\IteratorAggregate
 {
-    use UniversalClass;
+	use UniversalClass;
     
-    /**
-     * Array of elements in the structure.
-     *
-     * @var Element[] $_elements
-     */
-    protected $_elements;
+	/**
+	 * Array of elements in the structure.
+	 *
+	 * @var Element[] $_elements
+	 */
+	protected $_elements;
     
-    /**
-     * Lookup table for the tagged elements.
-     *
-     * @var TaggedType[]|null $_taggedMap
-     */
-    private $_taggedMap;
+	/**
+	 * Lookup table for the tagged elements.
+	 *
+	 * @var TaggedType[]|null $_taggedMap
+	 */
+	private $_taggedMap;
     
-    /**
-     * Cache variable of elements wrapped into UnspecifiedType objects.
-     *
-     * @var UnspecifiedType[]|null $_unspecifiedTypes
-     */
-    private $_unspecifiedTypes;
+	/**
+	 * Cache variable of elements wrapped into UnspecifiedType objects.
+	 *
+	 * @var UnspecifiedType[]|null $_unspecifiedTypes
+	 */
+	private $_unspecifiedTypes;
     
-    /**
-     * Constructor.
-     *
-     * @param Element ...$elements Any number of elements
-     */
-    public function __construct(Element ...$elements)
-    {
-        $this->_elements = $elements;
-    }
+	/**
+	 * Constructor.
+	 *
+	 * @param Element ...$elements Any number of elements
+	 */
+	public function __construct(Element ...$elements)
+	{
+		$this->_elements = $elements;
+	}
     
-    /**
-     * Clone magic method.
-     */
-    public function __clone()
-    {
-        // clear cache-variables
-        $this->_taggedMap = null;
-        $this->_unspecifiedTypes = null;
-    }
+	/**
+	 * Clone magic method.
+	 */
+	public function __clone()
+	{
+		// clear cache-variables
+		$this->_taggedMap = null;
+		$this->_unspecifiedTypes = null;
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::isConstructed()
-     * @return bool
-     */
-    public function isConstructed(): bool
-    {
-        return true;
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::isConstructed()
+	 * @return bool
+	 */
+	public function isConstructed(): bool
+	{
+		return true;
+	}
     
-    /**
-     *
-     * @see \ASN1\Element::_encodedContentDER()
-     * @return string
-     */
-    protected function _encodedContentDER(): string
-    {
-        $data = "";
-        foreach ($this->_elements as $element) {
-            $data .= $element->toDER();
-        }
-        return $data;
-    }
+	/**
+	 *
+	 * @see \ASN1\Element::_encodedContentDER()
+	 * @return string
+	 */
+	protected function _encodedContentDER(): string
+	{
+		$data = "";
+		foreach ($this->_elements as $element) {
+			$data .= $element->toDER();
+		}
+		return $data;
+	}
     
-    /**
-     *
-     * {@inheritdoc}
-     * @see \ASN1\Element::_decodeFromDER()
-     * @return self
-     */
-    protected static function _decodeFromDER(Identifier $identifier, string $data,
-        int &$offset): ElementBase
-    {
-        $idx = $offset;
-        if (!$identifier->isConstructed()) {
-            throw new DecodeException(
-                "Structured element must have constructed bit set.");
-        }
-        $length = Length::expectFromDER($data, $idx);
-        $end = $idx + $length->intLength();
-        $elements = [];
-        while ($idx < $end) {
-            $elements[] = Element::fromDER($data, $idx);
-            // check that element didn't overflow length
-            if ($idx > $end) {
-                throw new DecodeException(
-                    "Structure's content overflows length.");
-            }
-        }
-        $offset = $idx;
-        // return instance by static late binding
-        return new static(...$elements);
-    }
+	/**
+	 *
+	 * {@inheritdoc}
+	 * @see \ASN1\Element::_decodeFromDER()
+	 * @return self
+	 */
+	protected static function _decodeFromDER(Identifier $identifier, string $data,
+		int &$offset): ElementBase
+	{
+		$idx = $offset;
+		if (!$identifier->isConstructed()) {
+			throw new DecodeException(
+				"Structured element must have constructed bit set.");
+		}
+		$length = Length::expectFromDER($data, $idx);
+		$end = $idx + $length->intLength();
+		$elements = [];
+		while ($idx < $end) {
+			$elements[] = Element::fromDER($data, $idx);
+			// check that element didn't overflow length
+			if ($idx > $end) {
+				throw new DecodeException(
+					"Structure's content overflows length.");
+			}
+		}
+		$offset = $idx;
+		// return instance by static late binding
+		return new static(...$elements);
+	}
     
-    /**
-     * Explode DER structure to DER encoded components that it contains.
-     *
-     * @param string $data
-     * @throws DecodeException
-     * @return string[]
-     */
-    public static function explodeDER(string $data): array
-    {
-        $offset = 0;
-        $identifier = Identifier::fromDER($data, $offset);
-        if (!$identifier->isConstructed()) {
-            throw new DecodeException("Element is not constructed.");
-        }
-        $length = Length::expectFromDER($data, $offset)->intLength();
-        $end = $offset + $length;
-        $parts = [];
-        while ($offset < $end) {
-            // start of the element
-            $idx = $offset;
-            // skip identifier
-            Identifier::fromDER($data, $offset);
-            // decode element length
-            $length = Length::expectFromDER($data, $offset)->intLength();
-            // extract der encoding of the element
-            $parts[] = substr($data, $idx, $offset - $idx + $length);
-            // update offset over content
-            $offset += $length;
-        }
-        return $parts;
-    }
+	/**
+	 * Explode DER structure to DER encoded components that it contains.
+	 *
+	 * @param string $data
+	 * @throws DecodeException
+	 * @return string[]
+	 */
+	public static function explodeDER(string $data): array
+	{
+		$offset = 0;
+		$identifier = Identifier::fromDER($data, $offset);
+		if (!$identifier->isConstructed()) {
+			throw new DecodeException("Element is not constructed.");
+		}
+		$length = Length::expectFromDER($data, $offset)->intLength();
+		$end = $offset + $length;
+		$parts = [];
+		while ($offset < $end) {
+			// start of the element
+			$idx = $offset;
+			// skip identifier
+			Identifier::fromDER($data, $offset);
+			// decode element length
+			$length = Length::expectFromDER($data, $offset)->intLength();
+			// extract der encoding of the element
+			$parts[] = substr($data, $idx, $offset - $idx + $length);
+			// update offset over content
+			$offset += $length;
+		}
+		return $parts;
+	}
     
-    /**
-     * Get self with an element at the given index replaced by another.
-     *
-     * @param int $idx Element index
-     * @param Element $el New element to insert into the structure
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withReplaced(int $idx, Element $el): self
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have element at index $idx.");
-        }
-        $obj = clone $this;
-        $obj->_elements[$idx] = $el;
-        return $obj;
-    }
+	/**
+	 * Get self with an element at the given index replaced by another.
+	 *
+	 * @param int $idx Element index
+	 * @param Element $el New element to insert into the structure
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withReplaced(int $idx, Element $el): self
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have element at index $idx.");
+		}
+		$obj = clone $this;
+		$obj->_elements[$idx] = $el;
+		return $obj;
+	}
     
-    /**
-     * Get self with an element inserted before the given index.
-     *
-     * @param int $idx Element index
-     * @param Element $el New element to insert into the structure
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withInserted(int $idx, Element $el): self
-    {
-        if (count($this->_elements) < $idx || $idx < 0) {
-            throw new \OutOfBoundsException("Index $idx is out of bounds.");
-        }
-        $obj = clone $this;
-        array_splice($obj->_elements, $idx, 0, [$el]);
-        return $obj;
-    }
+	/**
+	 * Get self with an element inserted before the given index.
+	 *
+	 * @param int $idx Element index
+	 * @param Element $el New element to insert into the structure
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withInserted(int $idx, Element $el): self
+	{
+		if (count($this->_elements) < $idx || $idx < 0) {
+			throw new \OutOfBoundsException("Index $idx is out of bounds.");
+		}
+		$obj = clone $this;
+		array_splice($obj->_elements, $idx, 0, [$el]);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element appended to the end.
-     *
-     * @param Element $el Element to insert into the structure
-     * @return self
-     */
-    public function withAppended(Element $el): self
-    {
-        $obj = clone $this;
-        array_push($obj->_elements, $el);
-        return $obj;
-    }
+	/**
+	 * Get self with an element appended to the end.
+	 *
+	 * @param Element $el Element to insert into the structure
+	 * @return self
+	 */
+	public function withAppended(Element $el): self
+	{
+		$obj = clone $this;
+		array_push($obj->_elements, $el);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element prepended in the beginning.
-     *
-     * @param Element $el Element to insert into the structure
-     * @return self
-     */
-    public function withPrepended(Element $el): self
-    {
-        $obj = clone $this;
-        array_unshift($obj->_elements, $el);
-        return $obj;
-    }
+	/**
+	 * Get self with an element prepended in the beginning.
+	 *
+	 * @param Element $el Element to insert into the structure
+	 * @return self
+	 */
+	public function withPrepended(Element $el): self
+	{
+		$obj = clone $this;
+		array_unshift($obj->_elements, $el);
+		return $obj;
+	}
     
-    /**
-     * Get self with an element at the given index removed.
-     *
-     * @param int $idx Element index
-     * @throws \OutOfBoundsException
-     * @return self
-     */
-    public function withoutElement(int $idx): self
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have element at index $idx.");
-        }
-        $obj = clone $this;
-        array_splice($obj->_elements, $idx, 1);
-        return $obj;
-    }
+	/**
+	 * Get self with an element at the given index removed.
+	 *
+	 * @param int $idx Element index
+	 * @throws \OutOfBoundsException
+	 * @return self
+	 */
+	public function withoutElement(int $idx): self
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have element at index $idx.");
+		}
+		$obj = clone $this;
+		array_splice($obj->_elements, $idx, 1);
+		return $obj;
+	}
     
-    /**
-     * Get elements in the structure.
-     *
-     * @return UnspecifiedType[]
-     */
-    public function elements(): array
-    {
-        if (!isset($this->_unspecifiedTypes)) {
-            $this->_unspecifiedTypes = array_map(
-                function (Element $el) {
-                    return new UnspecifiedType($el);
-                }, $this->_elements);
-        }
-        return $this->_unspecifiedTypes;
-    }
+	/**
+	 * Get elements in the structure.
+	 *
+	 * @return UnspecifiedType[]
+	 */
+	public function elements(): array
+	{
+		if (!isset($this->_unspecifiedTypes)) {
+			$this->_unspecifiedTypes = array_map(
+				function (Element $el) {
+					return new UnspecifiedType($el);
+				}, $this->_elements);
+		}
+		return $this->_unspecifiedTypes;
+	}
     
-    /**
-     * Check whether the structure has an element at the given index, optionally
-     * satisfying given tag expectation.
-     *
-     * @param int $idx Index 0..n
-     * @param int|null $expectedTag Optional type tag expectation
-     * @return bool
-     */
-    public function has(int $idx, $expectedTag = null): bool
-    {
-        if (!isset($this->_elements[$idx])) {
-            return false;
-        }
-        if (isset($expectedTag)) {
-            if (!$this->_elements[$idx]->isType($expectedTag)) {
-                return false;
-            }
-        }
-        return true;
-    }
+	/**
+	 * Check whether the structure has an element at the given index, optionally
+	 * satisfying given tag expectation.
+	 *
+	 * @param int $idx Index 0..n
+	 * @param int|null $expectedTag Optional type tag expectation
+	 * @return bool
+	 */
+	public function has(int $idx, $expectedTag = null): bool
+	{
+		if (!isset($this->_elements[$idx])) {
+			return false;
+		}
+		if (isset($expectedTag)) {
+			if (!$this->_elements[$idx]->isType($expectedTag)) {
+				return false;
+			}
+		}
+		return true;
+	}
     
-    /**
-     * Get the element at the given index, optionally checking that the element
-     * has a given tag.
-     *
-     * <strong>NOTE!</strong> Expectation checking is deprecated and should be
-     * done with <code>UnspecifiedType</code>.
-     *
-     * @param int $idx Index 0..n
-     * @param int|null $expectedTag Optional type tag expectation
-     * @throws \OutOfBoundsException If element doesn't exists
-     * @throws \UnexpectedValueException If expectation fails
-     * @return UnspecifiedType
-     */
-    public function at(int $idx, $expectedTag = null): UnspecifiedType
-    {
-        if (!isset($this->_elements[$idx])) {
-            throw new \OutOfBoundsException(
-                "Structure doesn't have an element at index $idx.");
-        }
-        $element = $this->_elements[$idx];
-        if (isset($expectedTag)) {
-            $element->expectType($expectedTag);
-        }
-        return new UnspecifiedType($element);
-    }
+	/**
+	 * Get the element at the given index, optionally checking that the element
+	 * has a given tag.
+	 *
+	 * <strong>NOTE!</strong> Expectation checking is deprecated and should be
+	 * done with <code>UnspecifiedType</code>.
+	 *
+	 * @param int $idx Index 0..n
+	 * @param int|null $expectedTag Optional type tag expectation
+	 * @throws \OutOfBoundsException If element doesn't exists
+	 * @throws \UnexpectedValueException If expectation fails
+	 * @return UnspecifiedType
+	 */
+	public function at(int $idx, $expectedTag = null): UnspecifiedType
+	{
+		if (!isset($this->_elements[$idx])) {
+			throw new \OutOfBoundsException(
+				"Structure doesn't have an element at index $idx.");
+		}
+		$element = $this->_elements[$idx];
+		if (isset($expectedTag)) {
+			$element->expectType($expectedTag);
+		}
+		return new UnspecifiedType($element);
+	}
     
-    /**
-     * Check whether the structure contains a context specific element with a
-     * given tag.
-     *
-     * @param int $tag Tag number
-     * @return bool
-     */
-    public function hasTagged(int $tag): bool
-    {
-        // lazily build lookup map
-        if (!isset($this->_taggedMap)) {
-            $this->_taggedMap = [];
-            foreach ($this->_elements as $element) {
-                if ($element->isTagged()) {
-                    $this->_taggedMap[$element->tag()] = $element;
-                }
-            }
-        }
-        return isset($this->_taggedMap[$tag]);
-    }
+	/**
+	 * Check whether the structure contains a context specific element with a
+	 * given tag.
+	 *
+	 * @param int $tag Tag number
+	 * @return bool
+	 */
+	public function hasTagged(int $tag): bool
+	{
+		// lazily build lookup map
+		if (!isset($this->_taggedMap)) {
+			$this->_taggedMap = [];
+			foreach ($this->_elements as $element) {
+				if ($element->isTagged()) {
+					$this->_taggedMap[$element->tag()] = $element;
+				}
+			}
+		}
+		return isset($this->_taggedMap[$tag]);
+	}
     
-    /**
-     * Get a context specific element tagged with a given tag.
-     *
-     * @param int $tag
-     * @throws \LogicException If tag doesn't exists
-     * @return TaggedType
-     */
-    public function getTagged(int $tag): TaggedType
-    {
-        if (!$this->hasTagged($tag)) {
-            throw new \LogicException("No tagged element for tag $tag.");
-        }
-        return $this->_taggedMap[$tag];
-    }
+	/**
+	 * Get a context specific element tagged with a given tag.
+	 *
+	 * @param int $tag
+	 * @throws \LogicException If tag doesn't exists
+	 * @return TaggedType
+	 */
+	public function getTagged(int $tag): TaggedType
+	{
+		if (!$this->hasTagged($tag)) {
+			throw new \LogicException("No tagged element for tag $tag.");
+		}
+		return $this->_taggedMap[$tag];
+	}
     
-    /**
-     *
-     * @see \Countable::count()
-     * @return int
-     */
-    public function count(): int
-    {
-        return count($this->_elements);
-    }
+	/**
+	 *
+	 * @see \Countable::count()
+	 * @return int
+	 */
+	public function count(): int
+	{
+		return count($this->_elements);
+	}
     
-    /**
-     * Get an iterator for the UnspecifiedElement objects.
-     *
-     * @see \IteratorAggregate::getIterator()
-     * @return \ArrayIterator
-     */
-    public function getIterator(): \ArrayIterator
-    {
-        return new \ArrayIterator($this->elements());
-    }
+	/**
+	 * Get an iterator for the UnspecifiedElement objects.
+	 *
+	 * @see \IteratorAggregate::getIterator()
+	 * @return \ArrayIterator
+	 */
+	public function getIterator(): \ArrayIterator
+	{
+		return new \ArrayIterator($this->elements());
+	}
 }