I like statement modifiers at the end for simple things like an early return, or throwing an exception. To handle longer lines I use indention:
die 'Detailed error messages are important, especially when this error
But with the long exception you showed I might do:
error => 'Detailed error messages are important, especially when t
+his error happens',
) if $oops;
I often hear that switching the order is difficult and that it is a good reason not to use the trailing conditional. In practice, I haven't found that switching the conditional around to be that onerous. A good text editor makes it easy. If switching was so hard you would see more of this:
die "Ach, food poisoning";
) if $ptomaine;
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