# -*- coding: utf-8 -*-
# Copyright (C) 2011-2012 Rocky Bernstein <rocky@cpan.org>
use warnings; no warnings 'redefine'; no warnings 'once';
use rlib '../../../../..';
package Devel::Trepan::CmdProcessor::Command::Set::Variable;
use Devel::Trepan::CmdProcessor::Command::Subcmd::Core;
use PadWalker qw(peek_our peek_my);
use strict;
use vars qw(@ISA @SUBCMD_VARS);
@ISA = qw(Devel::Trepan::CmdProcessor::Command::Subcmd);
# Values inherited from parent
use vars @Devel::Trepan::CmdProcessor::Command::Subcmd::SUBCMD_VARS;
## FIXME: do automatically.
our $CMD = "set variable";
our $HELP = <<"HELP";
${CMD} VARIABLE_NAME VALUE
Set a 'my' or 'our' variable. VALUE must be a constant.
Examples:
$CMD \$foo 20
$CMD \@ARY = (1,2,3)
HELP
our $SHORT_HELP = "Set a 'my' or 'our' variable";
use constant MIN_ARGS => 2;
use constant MAX_ARGS => undef;
use constant NEED_STACK => 1;
our $MIN_ABBREV = length('var');
sub set_var($$$)
{
my ($var_name, $ref, $value) = @_;
my $type = substr($var_name, 1, 1);
if ('$' eq $type) {
${$ref->{$var_name}} = $value;
} elsif ('@' eq $type) {
@{$ref->{$var_name}} = @{$value};
} elsif ('%' eq $type) {
%{$ref->{$var_name}} = %{$value};
} else {
${$ref->{$var_name}} = $value;
}
}
sub run($$)
{
my ($self, $args) = @_;
my $proc = $self->{proc};
my @args = @$args;
shift @args; shift @args;
my $var_name = shift @args;
shift @args if $args[0] eq '=';
my $value = join(' ', @args);
my $i;
while (my ($pkg, $file, $line, $fn) = caller($i++)) { ; };
my $diff = $i - $DB::stack_depth;
# FIXME: 4 is a magic fixup constant, also found in DB::finish.
# Remove it.
my $our_hash = peek_our($diff + $proc->{frame_index} + 4);
my $my_hash = peek_my($diff + $proc->{frame_index} + 4);
if (exists($my_hash->{$var_name})) {
set_var($var_name, $my_hash, $value);
} elsif (exists($our_hash->{$var_name})) {
set_var($var_name, $my_hash, $value);
} else {
$proc->errmsg("Can't find $var_name as a 'my' or 'our' variable");
}
}
unless (caller) {
require Devel::Trepan;
# Demo it.
# require_relative '../../mock'
# my($dbgr, $parent_cmd) = MockDebugger::setup('show');
# $cmd = __PACKAGE__->new(parent_cmd);
# $cmd->run(@$cmd->prefix);
}
# Suppress a "used-once" warning;
$HELP || scalar @SUBCMD_VARS;