[eclipse-clp-users] switching debugger on with trace

[Chris M. <Chr...@se...>]

I am reacquainting myself with ECLiPSe 7.0 after playing with SICSTUS for a while...

I SICSTUS I can insert a call to the predicate 'trace' anywhere in my code, and the debugger will awake and waits for my instructions there.

In ECLiPSe, trace seems to be a command, not a predicate, so I cannot do the same.
spy/1 must be applied to a whole predicate so it cannot be used to switch the debugger in between predicate calls. set_flag/3 also require a predicate

The best I can do to replicate that behaviour (after an hour of experimentation!) is to create my own mytrace/0 predicate:

p :- big_goal1, mytrace, buggy_goal, big_goal2.

big_goal1.
buggy_goal.
big_goal2.

mytrace.
:- spy mytrace/0.

This works as expected: the debugger switches itself on and I can creep through the rest of the code.
I could not get debug/1 on its own nor with set_flag/3 to work.


Is there a better way?

Thanks,
Chris
--
Dr Chris Meudec<http://www.echancrure.eu/> (he/him) Maitrise, PhD, MA (T&L)
Lecturer in Software Development
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