Is there a reason not to redefine `log-debug` et al as macros that evaluate their arguments lazily?
Sort of like this; (if ((current-logging-level) . is-equal-or-above? . 'debug) (log-debug arg ...) (void)) Because I find that my use of these functions often looks like this: (log-debug "Value = ~a" (expensive-operation-for-logging-purposes)) The problem is that when I change to a lower logging level, the (expensive-operation) is still evaluated. I asked a similar question about hash-ref! not long ago. The answer was that you can get lazy evaluation by wrapping the default argument in a lambda, like so: (hash-ref! hashtable key (λ () (expression-that-produces-value))) But it seems there's no equivalent idiom for `log-debug` et al. ____________________ Racket Users list: http://lists.racket-lang.org/users
