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package main;
use strict;
use warnings;
# ABSTRACT: retain previous results to be able to refer to them later
use mop;
=head1 SYNOPSIS
; .replyrc
[ResultCache]
variable = r
=head1 DESCRIPTION
This plugin caches the results of successful evaluations, and provides them in
a lexical array (by default C<@res>, although this can be changed via the
C<variable> option). This means that you can, for instance, access the value
returned by the previous line with C<$res[-1]>. It also modifies the output to
include an indication of where the value is stored, for later reference.
=cut
class Reply::Plugin::ResultCache extends Reply::Plugin {
has $results = [];
has $variable = 'res';
method execute ($next, @args) {
my @res = $next->(@args);
if (@res == 1) {
push @$results, $res[0];
}
elsif (@res > 1) {
push @$results, \@res;
}
return @res;
}
method mangle_result ($result) {
return unless defined $result;
return '$' . $variable . '[' . $#$results . '] = ' . $result;
}
method lexical_environment {
return { "\@$variable" => [ @$results ] };
}
}
1;
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