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 # we sort the keys in order to make debugging more predictable
33 foreach my $outstanding (sort keys %QUOTE_OUTSTANDING) {
34 my ($name, $code, $captures) = @{$QUOTE_OUTSTANDING{$outstanding}};
36 push @localize_these, $name if $name;
40 if (keys %$captures) {
41 my $ass_cap_count = @assembled_captures;
42 $make_sub .= capture_unroll("\$_[1][${ass_cap_count}]", $captures, 2);
43 push @assembled_captures, $captures;
46 my $o_quoted = perlstring $outstanding;
49 # disable the 'variable $x will not stay shared' warning since
50 # we're not letting it escape from this scope anyway so there's
51 # nothing trying to share it
52 ? " no warnings 'closure';\n sub ${name} {\n"
53 : " \$Sub::Quote::QUOTED{${o_quoted}}[3] = sub {\n"
56 $make_sub .= " }".($name ? '' : ';')."\n";
58 $make_sub .= " \$Sub::Quote::QUOTED{${o_quoted}}[3] = \\&${name}\n";
61 $assembled_code .= $make_sub;
63 my $debug_code = $assembled_code;
64 if (@localize_these) {
66 "# localizing: ".join(', ', @localize_these)."\n"
68 $assembled_code = join("\n",
69 (map { "local *${_};" } @localize_these),
70 'eval '.perlstring($assembled_code).'; die $@ if $@;'
73 $ENV{SUB_QUOTE_DEBUG} && warn $assembled_code;
75 $assembled_code .= "\n1;";
76 unless (_clean_eval $assembled_code, \@assembled_captures) {
77 die "Eval went very, very wrong:\n\n${debug_code}\n\n$@";
79 $ENV{SUB_QUOTE_DEBUG} && warn $debug_code;
80 %QUOTE_OUTSTANDING = ();
84 # HOLY DWIMMERY, BATMAN!
85 # $name => $code => \%captures => \%options
86 # $name => $code => \%captures
88 # $code => \%captures => \%options
91 (ref($_[-1]) eq 'HASH' and ref($_[-2]) eq 'HASH')
94 my $captures = pop if ref($_[-1]) eq 'HASH';
95 undef($captures) if $captures && !keys %$captures;
99 my $deferred = defer_sub +($options->{no_install} ? undef : $name) => sub {
100 unquote_sub($outstanding);
102 $outstanding = "$deferred";
103 $QUOTE_OUTSTANDING{$outstanding} = $QUOTED{$outstanding} = [
104 $name, $code, $captures
109 sub quoted_from_sub {
116 _unquote_all_outstanding;