sender/1

Description

sender(Sender)

Returns the object that has sent the message under processing. Note that this predicate implies an instantiation between its argument and the corresponding implicit context argument in the predicate containing the call. This instantiation occurs at the clause head, not at the clause body.

Template and modes

sender(?object_identifier)

Errors

(none)

Examples

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

test :-
    sender(Sender),
    write('executing a method to answer a message sent by '),
    writeq(Sender), nl.