Logtalk reference manual
Built-in method: sender/1
Contents > Reference Manual > Built-in Methods > sender/1

## sender/1

#### Description

    sender(Sender)

Returns the object that has sent the message under processing. This private method is translated into a unification between its argument and the corresponding implicit context argument in the predicate containing the call. This unification occurs at the clause head when the argument is not instantiated (the most common case).

#### 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.

#### See also

`parameter/2`, `self/1`, `this/1`