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package Reply::Plugin::Hints;
my $default_hints;
my $default_hinthash;
my $default_warning_bits;
BEGIN {
$default_hints = $^H;
$default_hinthash = \%^H;
$default_warning_bits = ${^WARNING_BITS};
}
use strict;
use warnings;
# ABSTRACT: persists lexical hints across input lines
use base 'Reply::Plugin';
=head1 SYNOPSIS
; .replyrc
[Hints]
=head1 DESCRIPTION
This plugin persists the values of various compile time lexical hints between
evaluated lines. This means, for instance, that entering a line like C<use
strict> at the Reply prompt will cause C<strict> to be enabled for all future
lines (at least until C<no strict> is given).
=cut
sub new {
my $class = shift;
my $self = $class->SUPER::new(@_);
$self->{hints} = $default_hints;
$self->{hinthash} = $default_hinthash;
$self->{warning_bits} = $default_warning_bits;
return $self;
}
sub mangle_line {
my $self = shift;
my ($line) = @_;
my $package = __PACKAGE__;
return <<LINE;
BEGIN {
\$^H = \$${package}::hints;
\%^H = \%\$${package}::hinthash;
\${^WARNING_BITS} = \$${package}::warning_bits;
}
$line
;
BEGIN {
\$${package}::hints = \$^H;
\$${package}::hinthash = \\\%^H;
\$${package}::warning_bits = \${^WARNING_BITS};
}
LINE
}
sub compile {
my $self = shift;
my ($next, $line, %args) = @_;
# XXX it'd be nice to avoid using globals here, but we can't use
# eval_closure's environment parameter since we need to access the
# information in a BEGIN block
our $hints = $self->{hints};
our $hinthash = $self->{hinthash};
our $warning_bits = $self->{warning_bits};
my @result = $next->($line, %args);
$self->{hints} = $hints;
$self->{hinthash} = $hinthash;
$self->{warning_bits} = $warning_bits;
return @result;
}
1;
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