[mercury-users] Debug messages

[Philippe Teuwen]

> how can I make my program output some trace-data without using the
> io_state?

This was discussed last month.
Check in the archives of January
for the thread "Paper on Mercury from AI practitioner's standpoint":
http://www.cs.mu.oz.au/research/mercury/mailing-lists/mercury-users/mercury-users.200501/index.html

Especially Ralph Becket's mail with an "unsafe.m" file, very easy to use,
or Peter Ross's mail with as attachment a full solution "à la" log4j
(surprisingly called called log4m)

hope it helps

Phil


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