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: vgg_mexcompile.m
    path of file: ./repos/SelfExSR/external/imrender/vgg
    
    the code of the file until where you have to start completion: function okay = vgg_mexcompile(funcName, varargin)
%VGG_MEXCOMPILE  Mex compile helper function
%
%   okay = vgg_mexcompile(funcName)
%   okay = vgg_mexcompile(..., sourceList)
%   okay = vgg_mexcompile(..., lastCompiled)
%
% Compile mexed function, given an optional list of source files. Can
% optionally check if source files have been modified since the last
% compilation, and only compile if they have.
%
%IN:
%   funcName - string containg the name of the function to compile
%   sourceList - cell array of source files to be compiled. Default:
%                {[funcName '.cxx']}.
%   lastCompiled - datenum of the current mex file. Default: 0 (i.e. force
%                  compilation).
%
%OUT:
%   okay - 1: function compiled; 0: up-to-date, no need to compile; -1:
%          compilation failed.

% $Id: vgg_mexcompile.m,v 1.3 2009/09/13 20:34:58 ojw Exp $

% Set defaults for optional inputs
sourceList = [funcName '.cxx'];
lastCompiled = 0;
% Parse inputs

    
function okay = vgg_mexcompile(funcName, varargin)
%VGG_MEXCOMPILE  Mex compile helper function
%
%   okay = vgg_mexcompile(funcName)
%   okay = vgg_mexcompile(..., sourceList)
%   okay = vgg_mexcompile(..., lastCompiled)
%
% Compile mexed function, given an optional list of source files. Can
% optionally check if source files have been modified since the last
% compilation, and only compile if they have.
%
%IN:
%   funcName - string containg the name of the function to compile
%   sourceList - cell array of source files to be compiled. Default:
%                {[funcName '.cxx']}.
%   lastCompiled - datenum of the current mex file. Default: 0 (i.e. force
%                  compilation).
%
%OUT:
%   okay - 1: function compiled; 0: up-to-date, no need to compile; -1:
%          compilation failed.

% $Id: vgg_mexcompile.m,v 1.3 2009/09/13 20:34:58 ojw Exp $

% Set defaults for optional inputs
sourceList = [funcName '.cxx'];
lastCompiled = 0;
% Parse inputs
for a = 1:numel(varargin)
   if iscell(varargin{a}) && ischar(varargin{a}{1})
       sourceList = varargin{a};
   elseif isnumeric(varargin{a}) && isscalar(varargin{a})
       lastCompiled = varargin{a};
   end