pce_begin_class/3

pce_begin_class(+Term, +Super)

pce_begin_class(+Term, +Super, +Doc)

Start declaration of a class. Together with pce_end_class/0 (or pce_end_class/1) this directive brackets the definition of a Prolog-defined class. A Prolog source module may contain any number of these pairs, defining any number of XPCE classes.

Term defines both the class name and the term structure when an instance of the class is transformed into a Prolog term. The term has the form

+Class(...+Selector...)

where Class denotes the class name and the optional list of selectors gives the (argument-free) get-behaviours used to obtain the arguments of the term representation. See Object->Term.

The description term may be prefixed with the meta-class to be used. For example, the following declaration ensures the meta-class is my_meta_class:

my_meta_class:myobject

Super is the name of the super-class. It must be the name of a defined XPCE class or a class declared via pce_autoload/2.

Doc is an approximately 40-character summary documentation string visible in the manual tool.