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.. rst-class:: align-right

built-in method

.. index:: pair: findall/4; Built-in method .. _methods_findall_4:

findall/4

Description

::

findall(Template, Goal, List, Tail)

Variant of the :ref:methods_findall_3 method that allows passing the tail of the results list. It succeeds returning the tail argument when the goal has no solutions.

This built-in meta-predicate is declared as a private method and thus cannot be used as a message to an object.

Meta-predicate template

::

findall(*, 0, *, *)

Modes and number of proofs

::

findall(?term, +callable, ?list, ?term) - zero_or_one

Errors

| Goal is a variable: | instantiation_error | Goal is neither a variable nor a callable term: | type_error(callable, Goal) | Goal is a call to a non-existing predicate: | existence_error(procedure, Predicate)

Examples

| To find all solutions in the context of the object or category containing the call: | findall(Template, Goal, List, Tail) | To find all solutions of sending a message to :term:self: | findall(Template, ::Message, List, Tail) | To find all solutions of sending a message to an explicit object: | findall(Template, Object::Message, List, Tail)

.. seealso::

:ref:methods_bagof_3, :ref:methods_findall_3, :ref:methods_forall_2, :ref:methods_setof_3