SWI-Prolog -- findall/3

Documentation
- Reference manual
  - Built-in Predicates
    - Finding all Solutions to a Goal
      - findall/3
      - findall/4
      - findnsols/4
      - findnsols/5
      - bagof/3
      - setof/3
- Packages

Availability:built-in

[ISO]findall(+Template, :Goal, -Bag)

Create a list of the instantiations Template gets successively on backtracking over Goal and unify the result with Bag. Succeeds with an empty list if Goal has no solutions.

findall/3 is equivalent to bagof/3 with all free variables appearing in Goal scoped to the Goal with an existential (caret) operator (^), except that bagof/3 fails when Goal has no solutions.