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%%
%% This is file `GS_cut_EAN_control_digit.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% GS1.dtx (with options: `test,GS.cut.EAN.control.digit')
%%
%% EXPERIMENTAL CODE
%%
%% This Work depends on the correct version of expl3 release. If
%% you'll update expl3 you may need a update of this this Work too.
%%
%% Do not distribute this file without also distributing the
%% source files specified above.
%%
%% Do not distribute modified version of this file.
%%
%% File: GS1.dtx Copyright (C) 2012-2017 Markus Kohm
%%
%% It may be distributed and/or modified under the conditions of the
%% LaTeX Project Public License (LPPL), either version 1.3c of this
%% license or (at your option) any later version. The latest version
%% of this license is in the file
%%
%% http://www.latex-project.org/lppl.txt
%%
%% This file is part of the "GS1 bundle" (The Work in LPPL)
%% and all files in that bundle must be distributed together.
%%
%% The released version of this bundle is available from CTAN.
%%
%% -------------------------------------------------------------------------
\RequirePackage{expl3}[2017/05/29]
\GetIdInfo$Id: GS1.dtx 22 2017-07-15 18:03:18Z mjk $
{GS1 code handler and barcode generator}
\documentclass{article}
\usepackage{GS1}
\ExplSyntaxOn
\msg_new:nnn { GS1/test } { function }
{
Something~is~wrong~with~function~#1
\msg_line_context:~~of~\c_sys_jobname_str.tex.
}
\ExplSyntaxOff
\begin{document}
\raggedright
\ExplSyntaxOn
\seq_new:N \l_testa_seq
\GS_set_code_digit_seq:Nn \l_testa_seq {ISBN 978-3-86541-459-5}
With~control:~\seq_use:Nnnn \l_testa_seq { ,~ } { ,~} { ,~ }\\
\GS_set_code_digit_seq:Nn \l_testb_seq {ISBN 978-3-86541-459}
\GS_cut_EAN_control_digit:N \l_testa_seq
\seq_map_inline:Nn \l_testa_seq
{
\seq_pop_left:NN \l_testb_seq \l_tmpa_tl
\tl_set:Nn \l_tmpb_tl { #1 }
\tl_if_eq:NNF \l_tmpa_tl \l_tmpb_tl
{
\tl_show:N \l_testa_seq
\tl_show:N \l_testb_seq
\msg_fatal:nnn { GS1/test } { function }
{ \GS_cut_EAN_control_digit:N }
}
}
Without~control:~\seq_use:Nnnn \l_testa_seq { ,~ } { ,~} { ,~ }\\
\ExplSyntaxOff
\end{document}
%%
%%
%% End of file `GS_cut_EAN_control_digit.tex'.
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