You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: subsasgn_check.m
    path of file: ./repos/PsPM/src/ext/matlabbatch/@cfg_repeat
    
    the code of the file until where you have to start completion: function [sts, val] = subsasgn_check(item,subs,val)

% function [sts, val] = subsasgn_check(item,subs,val)
%
% This code is part of a batch job configuration system for MATLAB. See 
%      help matlabbatch
% for a general overview.
%_______________________________________________________________________

    
function [sts, val] = subsasgn_check(item,subs,val)

% function [sts, val] = subsasgn_check(item,subs,val)
%
% This code is part of a batch job configuration system for MATLAB. See 
%      help matlabbatch
% for a general overview.
%_______________________________________________________________________
% Copyright (C) 2007 Freiburg Brain Imaging

% Volkmar Glauche
% $Id: subsasgn_check.m 380 2016-11-08 07:47:23Z tmoser $

rev = '$Rev: 380 $'; %#ok
sts = true;
switch subs(1).subs
    case {'num'}
        sts = subsasgn_check_num(val);
    case {'values'}
        sts = ~cfg_get_defaults('cfg_item.checkval') || subsasgn_check_valcfg(subs,val,[0 Inf]);
    case {'val'}
        % Check maximum number of elements - don't limit minimum number
        sts = ~cfg_get_defaults('cfg_item.checkval') || subsasgn_check_valcfg(subs,val,[0 item.num(2)]);
        % Could also check whether added element is one from 'values' list
end