Logtalk reference manual
Built-in method: this/1

this/1

Description

this(This)

Unifies its argument with the identifier of the object that contains the predicate clause whose body is being executed (or the object importing the category that contains the predicate clause). This private method is implemented as a unification between its argument and the corresponding implicit execution-context argument in the predicate containing the call. This unification occurs at the clause head, not at the clause body. This method is useful for avoiding hard-coding references to an object identifier or for retrieving all object parameters with a single call when using parametric objects. See also parameter/2.

Template and modes

this(?object_identifier)

Errors

(none)

Examples

% after compilation, the write/1 call will be the first goal on the clause body:

test :-
    this(This),
    write('executing a definition contained in '),
    writeq(This), nl.