I don't count 'user errors' as errors. So I wouldn't mess with die (I keep that for errors in the code).
What I often do in these cases is for the method/sub to return a hash.
(
success => 0,
data => q{whatever},
message => q{something horrible happened},
)
my %result = validate($arg1, $arg2);
if ($result{success}){
# woot! we can continue
# do something with $result{data}
}
else{
# try again
send_screen_back($result{message});
}
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