public static function fromJSON()

in codegen/syntax/AliasDeclaration.hack [49:145]
97 lines of code
1 McCabe index (conditional complexity)

  public static function fromJSON(
    dict<arraykey, mixed> $json,
    string $file,
    int $initial_offset,
    string $source,
    string $_type_hint,
  ): this {
    $offset = $initial_offset;
    $attribute_spec = Node::fromJSON(
      ($json['alias_attribute_spec'] ?? dict['kind' => 'missing'])
        as dict<_, _>,
      $file,
      $offset,
      $source,
      'OldAttributeSpecification',
    );
    $offset += $attribute_spec?->getWidth() ?? 0;
    $keyword = Node::fromJSON(
      ($json['alias_keyword']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'Token',
    );
    $keyword = $keyword as nonnull;
    $offset += $keyword->getWidth();
    $name = Node::fromJSON(
      ($json['alias_name']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'NameToken',
    );
    $name = $name as nonnull;
    $offset += $name->getWidth();
    $generic_parameter = Node::fromJSON(
      ($json['alias_generic_parameter'] ?? dict['kind' => 'missing'])
        as dict<_, _>,
      $file,
      $offset,
      $source,
      'TypeParameters',
    );
    $offset += $generic_parameter?->getWidth() ?? 0;
    $constraint = Node::fromJSON(
      ($json['alias_constraint'] ?? dict['kind' => 'missing']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'TypeConstraint',
    );
    $offset += $constraint?->getWidth() ?? 0;
    $equal = Node::fromJSON(
      ($json['alias_equal']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'EqualToken',
    );
    $equal = $equal as nonnull;
    $offset += $equal->getWidth();
    $type = Node::fromJSON(
      ($json['alias_type']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'ITypeSpecifier',
    );
    $type = $type as nonnull;
    $offset += $type->getWidth();
    $semicolon = Node::fromJSON(
      ($json['alias_semicolon']) as dict<_, _>,
      $file,
      $offset,
      $source,
      'SemicolonToken',
    );
    $semicolon = $semicolon as nonnull;
    $offset += $semicolon->getWidth();
    $source_ref = shape(
      'file' => $file,
      'source' => $source,
      'offset' => $initial_offset,
      'width' => $offset - $initial_offset,
    );
    return new static(
      /* HH_IGNORE_ERROR[4110] */ $attribute_spec,
      /* HH_IGNORE_ERROR[4110] */ $keyword,
      /* HH_IGNORE_ERROR[4110] */ $name,
      /* HH_IGNORE_ERROR[4110] */ $generic_parameter,
      /* HH_IGNORE_ERROR[4110] */ $constraint,
      /* HH_IGNORE_ERROR[4110] */ $equal,
      /* HH_IGNORE_ERROR[4110] */ $type,
      /* HH_IGNORE_ERROR[4110] */ $semicolon,
      $source_ref,
    );
  }