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3.2.27 diedie Outside of an eval, this function prints the concatenated value
of Equivalent examples: die "Can't cd to spool: $!\n" unless chdir '/usr/spool/news'; chdir '/usr/spool/news' or die "Can't cd to spool: $!\n" (The second form is generally preferred, since the important part is the chdir.) Within an eval, the function sets the $@ variable equal to the error message that would have been produced otherwise, and aborts the eval, which then returns the undefined value. The die function can thus be used to raise named exceptions that can be caught at a higher level in the program. See the section on the eval function later in this chapter. If the final value of die "/etc/games is no good"; die "/etc/games is no good, stopped"; which produces, respectively: /etc/games is no good at canasta line 123. /etc/games is no good, stopped at canasta line 123. If you want your own error messages reporting the filename and linenumber, use
the die '"', __FILE__, '", line ', __LINE__, ", phooey on you!\n"; This produces output like: "canasta", line 38, phooey on you! |