- prepare_goal(+Goal0, -Goal1, +Options) is semidet[multifile, library(pengines)]
- Pre-preparation hook for running Goal0. The hook runs in the context
of the pengine. Goal is the raw goal given to ask. The returned
Goal1 is subject to goal expansion (expand_goal/2) and sandbox
validation (safe_goal/1) prior to execution. If this goal fails,
Goal0 is used for further processing.
- Arguments:
-
| Options | - provides the options as given to ask |
- pengines:prepare_goal(+GoalIn, -GoalOut, +Options) is semidet[multifile, wordlist(trace)]
- Handle the
breakpoints(List) option to set breakpoints prior to
execution of the query. If breakpoints are present and enabled,
the goal is executed in debug mode. List is a list, holding a
dict for each source that has breakpoints. The dict contains
these keys:
file is the source file. For the current Pengine source
this is pengine://<pengine>/src.breakpoints is a list of lines (integers) where to put
break points.