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: gf_asm_pdetoolbc.m
    path of file: ./repos/getfem/interface/src/octave
    
    the code of the file until where you have to start completion: function [Q,G,H,R,F]=gf_asm_pdetoolbc(mf_u, mf_d, b, e, f_expr)
%  FUNCTION [Q,G,H,R,F]=gf_asm_pdetoolbc(mf_u, mf_d, b, e, f_expr)
%  'pdetool style' assembling of boundary conditions
%  See gf_asm
%  Copyright (C) 1999-2017 Yves Renard
%
%  This file is a part of GetFEM++
%

    
function [Q,G,H,R,F]=gf_asm_pdetoolbc(mf_u, mf_d, b, e, f_expr)
%  FUNCTION [Q,G,H,R,F]=gf_asm_pdetoolbc(mf_u, mf_d, b, e, f_expr)
%  'pdetool style' assembling of boundary conditions
%  See gf_asm
%  Copyright (C) 1999-2017 Yves Renard
%
%  This file is a part of GetFEM++
%
%  GetFEM++  is  free software;  you  can  redistribute  it  and/or modify it
%  under  the  terms  of the  GNU  Lesser General Public License as published
%  by  the  Free Software Foundation;  either version 3 of the License,  or
%  (at your option) any later version along with the GCC Runtime Library
%  Exception either version 3.1 or (at your option) any later version.
%  This program  is  distributed  in  the  hope  that it will be useful,  but
%  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
%  or  FITNESS  FOR  A PARTICULAR PURPOSE.  See the GNU Lesser General Public
%  License and GCC Runtime Library Exception for more details.
%  You  should  have received a copy of the GNU Lesser General Public License
%  along  with  this program;  if not, write to the Free Software Foundation,
%  Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
% $Id$  
  if (nargin < 4), error('not enough input arguments'); end