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Re^7: 5.26 sigil reference syntax in subfunction

by dave_the_m (Monsignor)
on Nov 02, 2017 at 10:01 UTC ( #1202618=note: print w/replies, xml ) Need Help??


in reply to Re^6: 5.26 sigil reference syntax in subfunction
in thread 5.26 sigil reference syntax in subfunction

That example is neither short nor complete, so once again I'll have to speculate about what it is you're trying to achieve.

In the following code:

sub f { my ($r) = @_; $r->{level3} = 1; } my $rh; f($rh->{level1}{level2});
I'm guessing you'd like it to autovivify all three levels of hash, so that the effect is the same as
rh->{level1}{level2}){level3} = 1;
If so, that can be achieved with
f(\$rh->{level1}{level2}->%*);

Dave.

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Re^8: 5.26 sigil reference syntax in subfunction
by chenhonkhonk (Acolyte) on Nov 02, 2017 at 14:50 UTC
    use strict; use warnings; my @options_lines = (); my %files = (); my $key = ""; open (OPTIONSFILE, "<", ".\\include\\options.h"); while (<OPTIONSFILE>){ push ( @options_lines,"$_"); } close (OPTIONSFILE); assign_column_names_to_file( \@options_lines, \%{ $files{'options'}{'c +olumns'} } ); foreach $key (sort keys $files{'options'}{'columns'}{'config'}->%* ){ print "columns: $key\n"; } print "\nExiting\n"; exit 0; ############################################################# sub assign_column_names_to_file{ # \@options_lines, $file{'options'}-> +{columns} (hash reference) ##rewrite based on difopt my ($options_lines, $columnhash) = @_; #array ref, hash ref # this function populates a reference to a hash which has all the +column names, numbers, and states my $regex__cfg_names = qr"^(\/\*\+\*\/\s+\/\*\|)(.*)\*\/\r?$"; my $horizontal_offset = 116; #magic number, could calculate dynami +cally #my $horizontal_offset = 0; my @letters = (); my @config_names = (); my @columns = (); my $i = 0; my $j = 0; my $line; foreach $line (@$options_lines) { # read config names at top of file into $config_name if ($line =~ m/${regex__cfg_names}/) { #$horizontal_offset = length($1); #print (length($1 . "\n") - 1); undef @letters; @letters = split (/ ?/, $2); # for ($i = 0; $i <= $#letters; $i++) { for ($i = 0; $i < @letters; $i++) { if( $letters[$i] ne " " ){ $config_names[$i] .= $letters[$i]; } #print STDERR "\nConfig Name:".$config_names [$i]; } } } for( $i = 0; $i < @config_names ; $i++){ if( $config_names[$i] =~ m/.*ooo.*/ ){ next; } else { $$columnhash{'config'}{"$config_names[$i]"}{'column number +'} = $horizontal_offset + $i * 2; $$columnhash{'column number'}{$horizontal_offset + $i * 2} +{'config'} = "$config_names[$i]"; for( $j = 0; $j < @$options_lines; $j++){ if ( (length $$options_lines[$j] > $horizontal_offset ++ $i * 2 ) && (substr($$options_lines[$j], $horizontal_offset + $i * +2, 1) ne " ") ){ $$columnhash{'column number'}{$horizontal_offs +et + $i * 2}{'states'}{$j} = substr($$options_lines[$j], $horizontal_ +offset + $i * 2, 1); $$columnhash{'config'}{"$config_names[$i]"}{'r +owstates'}{$j} = substr($$options_lines[$j], $horizontal_offset + $i +* 2, 1); } } } } foreach $key ( keys $$columnhash{'column number'}->%* ){ #foreach $key (sort keys %{ $$columnhash{'config'} } ){ print "$key\n"; } return 0; }

    This is literally the entire code. Not sure what more you were expecting. I have left in accessing inside and outside the sub to demonstrate the inconsistent syntax. Particularly inside the function, the new syntax is not helpful, and is more than confusing because I have to pay attention to the front and back of hashes.

    Additionally, in upper function, I must use \%{} if I want to pass the hash reference - and it must be bracketed because of precedence compared to the first $.

      You have repeatedly failed to answer my questions, or to provide a short, complete, self-contained example, or to explain exactly what your issue is.

      I'm out.

      Dave.

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