.. efun:: int to_int(string)
  int to_int(float)
  int to_int(int)
  int to_int(closure)
  (int)<value>

  Floats are truncated to integer values; strings with leading digits are converted to integers up to the first non-digit; lfun-closures are converted into their function index (not adjusted for inheritance); variable closure are converted into their variable index; integers are just returned.

  Regarding floats, it is important to keep rounding effects in mind: ``to_int(3.1*10.0)`` does not return ``31``, but instead ``30``, because internally the result of the multiplication is ``30.999999``.

  The function supports the ``0x``, ``0o`` and ``0b`` base prefixes.

  .. limit:: The cast notation only works if the precise type of <value> is known at compile-time. This will not be fixed--use the function form instead.

  :history 3.2.1@2 introduced:
  :history 3.2.11/3.3.611 changed: added support for the base prefixes.

  .. seealso:: :efun:`to_string`, :efun:`sscanf`