parameters: (yielded: _Yieldable)
docstring: Convert a yielded object into a `.Future`.
  
      The default implementation accepts lists, dictionaries, and
      Futures. This has the side effect of starting any coroutines that
      did not start themselves, similar to `asyncio.ensure_future`.
  
      If the `~functools.singledispatch` library is available, this function
      may be extended to support additional types. For example::
  
          @convert_yielded.register(asyncio.Future)
          def _(asyncio_future):
              return tornado.platform.asyncio.to_tornado_future(asyncio_future)
  
      .. versionadded:: 4.1
docstring_summary: Convert a yielded object into a `.Future`.
docstring_tokens: Convert a yielded object into a . Future .
function: def convert_yielded(yielded: _Yieldable) -> Future:
      """Convert a yielded object into a `.Future`.
  
      The default implementation accepts lists, dictionaries, and
      Futures. This has the side effect of starting any coroutines that
      did not start themselves, similar to `asyncio.ensure_future`.
  
      If the `~functools.singledispatch` library is available, this function
      may be extended to support additional types. For example::
  
          @convert_yielded.register(asyncio.Future)
          def _(asyncio_future):
              return tornado.platform.asyncio.to_tornado_future(asyncio_future)
  
      .. versionadded:: 4.1
  
      """
      if yielded is None or yielded is moment:
          return moment
      elif yielded is _null_future:
          return _null_future
      elif isinstance(yielded, (list, dict)):
          return multi(yielded)  # type: ignore
      elif is_future(yielded):
          return typing.cast(Future, yielded)
      elif isawaitable(yielded):
          return _wrap_awaitable(yielded)  # type: ignore
      else:
          raise BadYieldError("yielded unknown object %r" % (yielded,))
function_tokens: def convert_yielded ( yielded : _Yieldable ) -> Future : if yielded is None or yielded is moment : return moment elif yielded is _null_future : return _null_future elif isinstance ( yielded , ( list , dict ) ) : return multi ( yielded ) # type: ignore elif is_future ( yielded ) : return typing . cast ( Future , yielded ) elif isawaitable ( yielded ) : return _wrap_awaitable ( yielded ) # type: ignore else : raise BadYieldError ( "yielded unknown object %r" % ( yielded , ) )