+sub _wrap {
+ my ($name, $proto, $i, $args, $cr, $opts) = @_;
+ while ($proto =~ s/(\\?)(\[[^\]]+\]|[^\];])//) {
+ my ($ref, $p) = ($1, $2);
+ $p = $1 if $p =~ /^\[([^\]]+)\]/;
+ my $cur = '$_[' . $i . ']';
+ if ($ref) {
+ if (length $p > 1) {
+ return 'my $r = ' . $opts->{ref} . '(' . $cur . '); '
+ . join ' els',
+ map( {
+ "if (\$r eq '" . $reftypes{$_} ."') { "
+ . _wrap($name, $proto, ($i + 1),
+ $args . $_ . '{' . $cur . '}, ',
+ $cr, $opts)
+ . ' }'
+ } split //, $p),
+ 'e { ' . $opts->{wrong_ref} . ' }'
+ } else {
+ $args .= $p . '{' . $cur . '}, ';
+ }
+ } elsif ($p =~ /[\@\%]/) {
+ $args .= '@_[' . $i . '..$#_]';
+ } elsif ($p =~ /\&/) {
+ my %h = do { my $c; map { $_ => $c++ } @$cr };
+ my $j;
+ if (not exists $h{$i}) {
+ push @$cr, $i;
+ $j = $#{$cr};
+ } else {
+ $j = int $h{$i};
+ }
+ $args .= 'sub{&{$c[' . $j . ']}}, ';
+ } elsif ($p eq '_') {
+ $args .= '((@_ > ' . $i . ') ? ' . $cur . ' : $_), ';
+ } else {
+ $args .= $cur . ', ';
+ }
+ ++$i;
+ }
+ $args =~ s/,\s*$//;
+ return $name . '(' . $args . ')';
+}
+
+sub _check_name {
+ my $name = $_[0];
+ croak 'No subroutine specified' unless $name;
+ my $proto;
+ my $r = ref $name;
+ if (!$r) {
+ $proto = prototype $name;
+ } elsif ($r eq 'HASH') {
+ croak 'Forced prototype hash reference must contain exactly one key/value pair' unless keys %$name == 1;
+ ($name, $proto) = %$name;
+ } else {
+ croak 'Unhandled ' . $r . ' reference as first argument';
+ }