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package Reply::Plugin::LexicalPersistence;
use strict;
use warnings;
# ABSTRACT: persists lexical variables between lines
use base 'Reply::Plugin';
use PadWalker 'peek_sub', 'closed_over';
=head1 SYNOPSIS
; .replyrc
[LexicalPersistence]
=head1 DESCRIPTION
This plugin persists the values of lexical variables between input lines. For
instance, with this plugin you can enter C<my $x = 2> into the Reply shell, and
then use C<$x> as expected in subsequent lines.
=cut
sub new {
my $class = shift;
my %opts = @_;
my $self = $class->SUPER::new(@_);
$self->{env} = {};
return $self;
}
sub compile {
my $self = shift;
my ($next, $line, %args) = @_;
my ($code) = $next->($line, %args);
my $new_env = peek_sub($code);
delete $new_env->{$_} for keys %{ closed_over($code) };
$self->{env} = {
%{ $self->{env} },
%$new_env,
};
return $code;
}
sub lexical_environment {
my $self = shift;
return $self->{env};
}
1;
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