examples/tools/demo-defsys.lisp. First, load this file to define the system. Then evaluate in the Listener:
(compile-system "demo" :load t)
Note: for another way to compile and load a system, see The System Browser.
my-functionis now highlighted orange, indicating that the next step is to call this function. Notice how the current stepping position is always highlighted orange.
Figure 26.2 Stepper backtrace showing the next step
my-functionitself, but for the moment simply choose Debug > Stepper > Step again, which steps to the point where the function call returns. The Backtrace area shows the return value, 12, when you expand the status item.
Note how the Step command always steps only inside the current form, and does not step into other functions.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011