PLOGHELP DEBUGGING                           Simon Nichols, October 1990

    ?- debugging.

The evaluable predicate debugging/0 displays a list of the currently
active spy-points. If spy-points are leashed, it also prints a message
to that effect. For example:

    ?- debugging.
    There are no spy-points
    yes

    ?- spy append.
    Spypoint placed on append/3
    yes

    ?- debugging.
    There are spy-points on the following procedures:
        append/3
    Spypoints are leashed
    yes

See PLOGHELP * SPY for information about the SPY debugging package.


-- RELATED DOCUMENTATION ----------------------------------------------

PLOGHELP * DEBUG
 Overview of the debugging facilities provided by POPLOG Prolog

PLOGHELP * LEASH
 Predicate which enables user interaction at spy-points

PLOGHELP * NODEBUG
 Predicate which removes all current spy-points

PLOGHELP * NOSPY
 Predicate which removes spy-points from specified predicates

PLOGHELP * QUIETSPY
 Predicate which disables the printing of messages when spy-points are
 set or removed

PLOGHELP * SPY
 How to set spy-points on predicates in order to debug them

PLOGHELP * UNLEASH
 Predicate which disables user interaction at spy-points


--- C.all/plog/help/debugging
--- Copyright University of Sussex 1990. All rights reserved. ----------