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/usr/share/perl5/LaTeXML/Package/tikz.sty.ltxml is in latexml 0.8.1-1.

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# -*- mode: Perl -*-
# /=====================================================================\ #
# |  tikz.sty                                                           | #
# | Implementation for LaTeXML                                          | #
# |=====================================================================| #
# | Part of LaTeXML:                                                    | #
# |  Public domain software, produced as part of work done by the       | #
# |  United States Government & not subject to copyright in the US.     | #
# |---------------------------------------------------------------------| #
# | Thanks to Silviu Vlad Oprea <s.oprea@jacobs-university.de>          | #
# | of the arXMLiv group for initial implementation                     | #
# |    http://arxmliv.kwarc.info/                                       | #
# | Released under the Gnu Public License                               | #
# | Released to the Public Domain                                       | #
# |---------------------------------------------------------------------| #
# | Bruce Miller <bruce.miller@nist.gov>                        #_#     | #
# | http://dlmf.nist.gov/LaTeXML/                              (o o)    | #
# \=========================================================ooo==U==ooo=/ #
package LaTeXML::Package::Pool;
use strict;
use warnings;
use LaTeXML::Package;

InputDefinitions('tikz', type => 'sty', noltxml => 1);

# Not absolutely necessary to redefine this, but it makes sure
# we load the file as definitions rather than content,
# with some slight efficiencies
##  \def\usetikzlibrary{\pgfutil@ifnextchar[{\use@tikzlibrary}{\use@@tikzlibrary}}%}
##  \def\use@tikzlibrary[#1]{\use@@tikzlibrary{#1}}
DefPrimitive('\use@@tikzlibrary{}', sub {
    my ($gullet, $libs) = @_;
    foreach my $lib (split(/,/, $libs = ToString(Expand($libs)))) {
      $lib =~ s/^\s+//; $lib =~ s/\s+$//;
      if ($lib && !LookupMeaning(T_CS('\tikz@library@' . $lib . '@loaded'))) {
        print STDERR "\nTIKZ LIBRARY $lib\n";
        Let(T_CS('\tikz@library@' . $lib . '@loaded'), T_CS('\pgfutil@empty'));
        my $barcc = LookupCatcode('|');
        AssignCatcode('|', CC_OTHER);
        InputDefinitions('tikzlibrary' . $lib . '.code.tex');
        AssignCatcode('|', $barcc);
      } }
    return; });

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