Has there been any discussion of how to create code in Perl 6 that's there
under some conditions, but not there under others? I'm thinking of the
spiritual equivalent of #ifdef, only Perlish.
In Perl 5, there were many attempts to use such a feature for debugging and
assertions. What everyone wanted to do was write code like this:
debug("Doing foo with $bar and $baz");
foo($bar, $baz);
And then have the entire call to debug() just plain disappear when the
program was run with a certain flag, or when a particular constant was set,
or whatever. The closest we got in Perl 5, AFAIK, was stuff this:
use constant DEBUG => 0;
...
debug("Doing foo with $bar and $baz") if DEBUG;
foo($bar, $baz);
But all those "if DEBUG"s or "DEBUG &&"s were a pain. So I'm wondering what
the solution will be in Perl 6.
-John
