5 sub _clean_eval { eval $_[0] }
11 our @EXPORT = qw(quote_sub unquote_sub quoted_from_sub);
13 our %QUOTE_OUTSTANDING;
18 my ($from, $captures, $indent) = @_;
23 or die "capture key should start with \@, \% or \$: $_";
24 (' ' x $indent).qq{my ${_} = ${1}{${from}->{${\perlstring $_}}};\n};
29 sub _unquote_all_outstanding {
30 return unless %QUOTE_OUTSTANDING;
31 my ($assembled_code, @assembled_captures, @localize_these) = '';
32 foreach my $outstanding (keys %QUOTE_OUTSTANDING) {
33 my ($name, $code, $captures) = @{$QUOTE_OUTSTANDING{$outstanding}};
35 push @localize_these, $name if $name;
39 if (keys %$captures) {
40 my $ass_cap_count = @assembled_captures;
41 $make_sub .= capture_unroll("\$_[1][${ass_cap_count}]", $captures, 2);
42 push @assembled_captures, $captures;
45 my $o_quoted = perlstring $outstanding;
48 # disable the 'variable $x will not stay shared' warning since
49 # we're not letting it escape from this scope anyway so there's
50 # nothing trying to share it
51 ? " no warnings 'closure';\n sub ${name} {\n"
52 : " \$Sub::Quote::QUOTED{${o_quoted}}[3] = sub {\n"
55 $make_sub .= " }".($name ? '' : ';')."\n";
57 $make_sub .= " \$Sub::Quote::QUOTED{${o_quoted}}[3] = \\&${name}\n";
60 $assembled_code .= $make_sub;
62 my $debug_code = $assembled_code;
63 if (@localize_these) {
65 "# localizing: ".join(', ', @localize_these)."\n"
67 $assembled_code = join("\n",
68 (map { "local *${_};" } @localize_these),
69 'eval '.perlstring($assembled_code).'; die $@ if $@;'
72 $ENV{SUB_QUOTE_DEBUG} && warn $assembled_code;
74 $assembled_code .= "\n1;";
75 unless (_clean_eval $assembled_code, \@assembled_captures) {
76 die "Eval went very, very wrong:\n\n${debug_code}\n\n$@";
78 $ENV{SUB_QUOTE_DEBUG} && warn $debug_code;
79 %QUOTE_OUTSTANDING = ();
83 # HOLY DWIMMERY, BATMAN!
84 # $name => $code => \%captures => \%options
85 # $name => $code => \%captures
87 # $code => \%captures => \%options
90 (ref($_[-1]) eq 'HASH' and ref($_[-2]) eq 'HASH')
93 my $captures = pop if ref($_[-1]) eq 'HASH';
94 undef($captures) if $captures && !keys %$captures;
98 my $deferred = defer_sub +($options->{no_install} ? undef : $name) => sub {
99 unquote_sub($outstanding);
101 $outstanding = "$deferred";
102 $QUOTE_OUTSTANDING{$outstanding} = $QUOTED{$outstanding} = [
103 $name, $code, $captures
108 sub quoted_from_sub {
115 _unquote_all_outstanding;