Indicates an abstract type. No instances can be created for an abstract type
The type is deprecated and may be removed in a
future version. A warning will be emitted if it is instantiated while
running with G_ENABLE_DIAGNOSTIC=1. Since 2.76
Indicates a final type. A final type is a non-derivable leaf node in a deep derivable type hierarchy tree. Since: 2.70
No special flags. Since: 2.74
Indicates an abstract value type, i.e. a type
that introduces a value table, but can't be used for
g_value_init()
Bit masks used to check or determine characteristics of a type.