common-lisp:standard-object, common-lisp:t

None

Values of this CFFI foreign type g-type identify the C GType. The g-type type is designated by its name, a string, or a numeric identifier. Functions accept g-type type designators as a string or integer and return them as a string. The g-type-name and g-type-from-name functions are used to convert between the name and the numeric identifier. Numeric identifier of g-type may be different between different program runs. But string identifier of a g-type type does not change.

+g-type-double+ => 60
(g-type-name +g-type-double+) => "gdouble"
(g-type-from-name "gdouble") => #<GTYPE :name "gdouble" :id 60>