Server IP : 85.214.239.14 / Your IP : 3.15.18.97 Web Server : Apache/2.4.62 (Debian) System : Linux h2886529.stratoserver.net 4.9.0 #1 SMP Tue Jan 9 19:45:01 MSK 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.18 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, MySQL : OFF | cURL : OFF | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : OFF Directory : /proc/3/root/proc/self/root/usr/share/perl5/ |
Upload File : |
# exceptions.pl # tchrist@convex.com # # This library is no longer being maintained, and is included for backward # compatibility with Perl 4 programs which may require it. # # In particular, this should not be used as an example of modern Perl # programming techniques. # # # Here's a little code I use for exception handling. It's really just # glorfied eval/die. The way to use use it is when you might otherwise # exit, use &throw to raise an exception. The first enclosing &catch # handler looks at the exception and decides whether it can catch this kind # (catch takes a list of regexps to catch), and if so, it returns the one it # caught. If it *can't* catch it, then it will reraise the exception # for someone else to possibly see, or to die otherwise. # # I use oddly named variables in order to make darn sure I don't conflict # with my caller. I also hide in my own package, and eval the code in his. # # The EXCEPTION: prefix is so you can tell whether it's a user-raised # exception or a perl-raised one (eval error). # # --tom # # examples: # if (&catch('/$user_input/', 'regexp', 'syntax error') { # warn "oops try again"; # redo; # } # # if ($error = &catch('&subroutine()')) { # catches anything # # &throw('bad input') if /^$/; sub catch { package exception; local($__code__, @__exceptions__) = @_; local($__package__) = caller; local($__exception__); eval "package $__package__; $__code__"; if ($__exception__ = &'thrown) { for (@__exceptions__) { return $__exception__ if /$__exception__/; } &'throw($__exception__); } } sub throw { local($exception) = @_; die "EXCEPTION: $exception\n"; } sub thrown { $@ =~ /^(EXCEPTION: )+(.+)/ && $2; } 1;