Commit | Line | Data |
8d732f30 |
1 | package Eval::WithLexicals::WithHintPersistence; |
2 | use Moo::Role; |
3 | use Sub::Quote; |
4 | |
9aa1478d |
5 | our $VERSION = '1.002000'; # 1.2.0 |
8d732f30 |
6 | $VERSION = eval $VERSION; |
7 | |
8 | # Used localised |
9 | our($hints, %hints); |
10 | |
11 | has hints => ( |
12 | is => 'rw', |
13 | default => quote_sub q{ {} }, |
14 | ); |
15 | |
16 | has _first_eval => ( |
17 | is => 'rw', |
18 | default => quote_sub q{ 1 }, |
19 | ); |
20 | |
21 | around eval => sub { |
22 | my $orig = shift; |
23 | my($self) = @_; |
24 | |
25 | local *Eval::WithLexicals::Cage::capture_hints; |
26 | local $Eval::WithLexicals::Cage::hints = { %{$self->hints} }; |
27 | |
28 | my @ret = $orig->(@_); |
29 | |
30 | $self->hints({ Eval::WithLexicals::Cage::capture_hints() }); |
31 | |
32 | @ret; |
33 | }; |
34 | |
35 | # XXX: Sub::Quote::capture_unroll without 'my' |
36 | use B(); |
37 | sub _capture_unroll_global { |
38 | my ($from, $captures, $indent) = @_; |
39 | join( |
40 | '', |
41 | map { |
42 | /^([\@\%\$])/ |
43 | or die "capture key should start with \@, \% or \$: $_"; |
44 | (' ' x $indent).qq{${_} = ${1}{${from}->{${\B::perlstring $_}}};\n}; |
45 | } keys %$captures |
46 | ); |
47 | } |
48 | |
49 | sub setup_code { |
50 | my($self) = @_; |
51 | # Only run the prelude on the first eval, hints will be set after |
52 | # that. |
53 | if($self->_first_eval) { |
54 | $self->_first_eval(0); |
55 | return $self->prelude; |
56 | } else { |
57 | # Seems we can't use the technique of passing via @_ for code in a BEGIN |
58 | # block |
59 | return q[ BEGIN { ], |
60 | _capture_unroll_global('$Eval::WithLexicals::Cage::hints', $self->hints, 2), |
61 | q[ } ], |
62 | } |
63 | }; |
64 | |
65 | around capture_code => sub { |
66 | my $orig = shift; |
67 | my($self) = @_; |
68 | |
69 | ( q{ sub Eval::WithLexicals::Cage::capture_hints { |
70 | no warnings 'closure'; |
71 | my($hints, %hints); |
72 | BEGIN { $hints = $^H; %hints = %^H; } |
73 | return q{$^H} => \$hints, q{%^H} => \%hints; |
74 | } }, |
75 | $orig->(@_) ) |
76 | }; |
77 | |
78 | =head1 NAME |
79 | |
80 | Eval::WithLexicals::WithHintPersistence - Persist compile hints between evals |
81 | |
82 | =head1 SYNOPSIS |
83 | |
84 | use Eval::WithLexicals; |
85 | |
86 | my $eval = Eval::WithLexicals->with_plugins("HintPersistence")->new; |
87 | |
88 | =head1 DESCRIPTION |
89 | |
90 | Persist pragams and other compile hints between evals (for example the |
91 | L<strict> and L<warnings> flags in effect). |
92 | |
93 | Saves and restores the C<$^H> and C<%^H> variables. |
94 | |
95 | =head1 METHODS |
96 | |
97 | =head2 hints |
98 | |
99 | $eval->hints('$^H') |
100 | |
101 | Returns the internal hints hash, keys are C<$^H> and C<%^H> for the hint bits |
102 | and hint hash respectively. |
103 | |
104 | =cut |
105 | |
106 | 1; |