Perl eval
From Teknologisk videncenter
Perl eval can be used as try and catch exception handling.
eval
{
# try
};
if($@)
{
# catch
}
Throwing an exception
eval
{
# try
die "Exception text to be catched";
};
if($@)
{
# catch
}
Example
#!/usr/bin/perl
eval
{
my $res = 1/0;
};
if($@)
{
print("Help - I'm dying\n");
print(" Perl Script.: $0\n");
print(" Perl verson.: $]\n");
print(" Error #.....: ",$@,"\n");
exit;
}
Yields
Help - I'm dying Perl Script.: C:\Programmer\Perl Express\Debug\temp6.cgi Perl verson.: 5.010001 Error #.....: Illegal division by zero at C:\Programmer\Perl Express\Debug\temp6.cgi line 5.