(cffi:defcstruct param-spec-float
  (:parent-instance (:pointer (:struct param-spec)))
  (:minimum :float)
  (:maximum :float)
  (:default-value :float)
  (:epsilon :float))  

:parent-instance

Private g:param-spec portion.

:minimum

The single float for the minimum value.

:maximum

The single float for the maximum value.

:default-value

The single float for the default value.

:epsilon

The single float, values closer than epsilon will be considered identical, the default value is 1e-30.