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%%
%% This is file `int_set_to_EAN_control_digit.tex',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% GS1.dtx (with options: `test,int.set.to.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}
\ExplSyntaxOn
\seq_new:N \l_testa_seq
\tl_new:N \l_control_tl
\GS_set_code_digit_seq:Nn \l_testa_seq {ISBN 978-3-86541-459-5}
\seq_pop_right:NN \l_testa_seq \l_control_tl
\int_new:N \l_control_int
\int_set_to_EAN_control_digit:NN \l_control_int \l_testa_seq
Control~digit~should~be~\tl_use:N \l_control_tl{} ~
\int_compare:nNnTF { \l_control_tl } { = } { \l_control_int }
{
~and~is~\int_use:N \l_control_int .
}
{
~but~it~\int_use:N \l_control_int .
\msg_error:nnn { GS1/test } { function }
{ \int_set_to_EAN_control_digit:NN }
}
\ExplSyntaxOff
\end{document}
%%
%%
%% End of file `int_set_to_EAN_control_digit.tex'.
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