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The problem one often faces is where at first sight standards and/or best practices conflict. In this case, there are at least three potentially conflicting factors that may need to be considered: 1) avoiding excessive nested blocks in terms of length and depth, 2) having a single point of return or exit from a routine or subroutine and 3) avoiding goto. Example:
sub fred { # meeting all three requirements:- my ($t, $u, $v, $w, $x, $y) = @_; somelogger( 5, "fred", "start of fred"); my $ok = method1($t); $ok &&= method2($u); my $pid = open my $ph, "/somewhere/program $v |"; my $output = ''; $ok &&= method3( <$ph>, \$output ); close $ph; waitpid $ph,0; # and so on for functionality using $w, $x and $y (in worst case s +cenario) # if goto were used to jump to the exit point the # label would have been here. if ($ok) { somelogger( 5, "fred", "fred completed successfully"); } else { somelogger( 5, "fred", "error during fred"); } return $ok; }
The point is that if goto were avoided using ifs, there would be one nesting level per error condition. Using &&= enables the code to cascade (without extra nested blocks) to the end whenever an error occurs. But many might consider the &&= too techy for the average programmer. Any thoughts, alternatives?

One world, one people

In reply to Re: Number of times I've used goto in Perl by (anonymized user)
in thread Number of times I've used goto in Perl by vroom

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