Hi Monks,

I'd like to make a return from subroutine by the code running in a BLOCK.

I noticed how grep is working in the question:

sub working
{
    my @a = (1);
    grep { print "grep\n"; return 'leave' } @a;
    print "Still here #1\n";
}
working;

__DATA__
grep

[download]

So, "Still here #1" is never shown.

grep is a Perl function, but I'd like to get such behaviour in a BLOCK of my own subroutine. Below is my example:

sub mygrep (&@) {
    my $code = shift;
    my @result;
    foreach $_ (@_) {
        push(@result, $_) if &$code;
    }
    @result;
}

sub notworking
{
    my @a = (1);
    mygrep { print "mygrep\n"; return 'leave' } @a;
    print "Still here #2\n";
}

notworking;

__DATA__
mygrep
Still here #2

[download]

And this is nothing like original grep makes.

So, the question is: How to run a code in BLOCK passed to a subroutine and call return in a caller?

In reply to Bare BLOCK vrs. grep BLOCK by powerin

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