File Coverage

blib/lib/Acme/DWIM.pm

Criterion	Covered	Total	%
statement	10	24	41.6
branch	0	2	0.0
condition			n/a
subroutine	2	4	50.0
pod	0	3	0.0
total	12	33	36.3

package Acme::DWIM;
$VERSION = '1.05';
my $dwimity = " \t"x4;
my $dwimop = '...';
my $string = qr< (?:["][^"\\]*(?:\\.[^"\\]*)*["]
	          | ['][^'\\]*(?:\\.[^'\\]*)*[']
		 )
	       >sx;

sub dwim {
	local $_ = pop;
	my $table;
	my $odd=0;
	use Data::Dumper 'Dumper';
	my @bits = split qr<(?!\s*\bx)($string|[\$\@%]\w+|[])}[({\w\s;/]+)>;
	for ($b=0;$b<@bits;$b+=2) {
		next unless $bits[$b];
		$table .= $bits[$b]."\n";
		$bits[$b] = $dwimop;
	}
	$_ = join "", @bits;
	$table = unpack "b*", $table;
	$table =~ tr/01/ \t/;
	$table =~ s/(.{8})/\n~$1/g;
	"$_\n~$dwimity$table";
}

sub undwim {
	local ($_,$table) = $_[0] =~ /(.*?)\n~$dwimity\n(.*)/sm;
	$table =~ s/[~\n]//g;
	$table =~ tr/ \t/01/;
	my @table = split /\n/, pack "b*", $table;
	s/\Q$dwimop/shift @table/ge;
	$_
}

sub dwum { $_[0] =~ /^$dwimity/ }
open 0 or print "Can't enDWIM '$0'\n" and exit;
(my $code = join "", <0>) =~ s/(.*)^\s*use\s+Acme::DWIM\s*;(\s*?)\n//sm;
my $pre = $1;
my $dwum = $2||"" eq $dwimity;
local $SIG{__WARN__} = \&dwum;
do {eval $pre . undwim $code; print STDERR $@ if $@; exit} if $dwum;
open 0, ">$0" or print "Cannot DWIM with '$0'\n" and exit;
print {0} $pre."use Acme::DWIM;$dwimity\n", dwim $code and exit;
__END__