Type for GObject instances. The type parameter provides type safety.

GType identifier — opaque; use Type.equal to compare, Type.to_int for formatting

GValue container for generic values

GClosure for signal callbacks

Get the GType of an object

Unsafe cast between object types

Safe coercion to generic object

same a b is true iff a and b wrap the same underlying GObject pointer. Two extractions of the same GObject (e.g. successive Gobject.Value.get_object calls in a signal callback) allocate distinct OCaml custom blocks, so Stdlib.(==) always returns false. Use same when the intent is identity comparison.

Stdlib.(=), Stdlib.compare, and Hashtbl.hash also operate on pointer identity for obj values (the custom block installs a pointer-compare / pointer-hash); same is the explicit form.

Get reference count (for debugging)