Removing the Current Focus from the Focus Stack

12.12.3 Removing the Current Focus from the Focus Stack

The function pop-focus removes the current focus from the focus stack and returns the module name of the current focus. If the focus stack is empty, then the symbol FALSE is returned.

Syntax

(pop-focus)

Example

CLIPS> (clear)
CLIPS> (list-focus-stack)
MAIN
CLIPS> (pop-focus)
MAIN
CLIPS> (defmodule A)
CLIPS> (defmodule B)
CLIPS> (focus A B)
TRUE
CLIPS> (list-focus-stack)
A
B
MAIN
CLIPS> (pop-focus)
A
CLIPS> (list-focus-stack)
B
CLIPS>