docs: def ceil(x, context=None):
      """
      Return the next higher or equal integer to x.
  
      If the result is not exactly representable, it will be rounded according to
      the current context.  Note that the rounding step means that it's possible
      for the result to be smaller than ``x``.  For example::
  
          >>> x = 2**100 + 1
          >>> ceil(2**100 + 1) >= x
          False
  
      One way to be sure of getting a result that's greater than or equal to
      ``x`` is to use the ``RoundTowardPositive`` rounding mode::
  
          >>> with RoundTowardPositive:
          ...     x = 2**100 + 1
          ...     ceil(x) >= x
          ...
          True
  
      Similar comments apply to the :func:`floor`, :func:`round` and
      :func:`trunc` functions.
  
      .. note::
  
         This function corresponds to the MPFR function ``mpfr_rint_ceil``,
         not to ``mpfr_ceil``.
  
      """
      return _apply_function_in_current_context(
          BigFloat,
          mpfr.mpfr_rint_ceil,
          (BigFloat._implicit_convert(x),),
          context,
      )