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diff --git a/gmp-6.3.0/demos/perl/GMP/Mpq.pm b/gmp-6.3.0/demos/perl/GMP/Mpq.pm
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+# GMP mpq module.
+
+# Copyright 2001 Free Software Foundation, Inc.
+#
+#  This file is part of the GNU MP Library.
+#
+#  The GNU MP Library is free software; you can redistribute it and/or modify
+#  it under the terms of either:
+#
+#    * 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.
+#
+#  or
+#
+#    * the GNU General Public License as published by the Free Software
+#      Foundation; either version 2 of the License, or (at your option) any
+#      later version.
+#
+#  or both in parallel, as here.
+#
+#  The GNU MP Library 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 General Public License
+#  for more details.
+#
+#  You should have received copies of the GNU General Public License and the
+#  GNU Lesser General Public License along with the GNU MP Library.  If not,
+#  see https://www.gnu.org/licenses/.
+
+
+package GMP::Mpq;
+
+require GMP;
+require Exporter;
+@ISA = qw(GMP Exporter);
+@EXPORT = qw();
+@EXPORT_OK = qw();
+%EXPORT_TAGS = ('all' => [qw(canonicalize den inv mpq num)],
+		'constants'   => [@EXPORT],
+		'noconstants' => [@EXPORT] );
+Exporter::export_ok_tags('all');
+
+use overload
+    '+'   => \&overload_add,     '+='  => \&overload_addeq,
+    '-'   => \&overload_sub,     '-='  => \&overload_subeq,
+    '*'   => \&overload_mul,     '*='  => \&overload_muleq,
+    '/'   => \&overload_div,     '/='  => \&overload_diveq,
+    '**'  => \&overload_pow,     '**=' => \&overload_poweq,
+    '<<'  => \&overload_lshift,  '<<=' => \&overload_lshifteq,
+    '>>'  => \&overload_rshift,  '>>=' => \&overload_rshifteq,
+
+    'bool' => \&overload_bool,
+    'not'  => \&overload_not,
+    '!'    => \&overload_not,
+    '=='   => \&overload_eq,
+    '!='   => \&overload_ne,
+    '<=>'  => \&overload_spaceship,
+    '++'   => \&overload_inc,
+    '--'   => \&overload_dec,
+    'abs'  => \&overload_abs,
+    'neg'  => \&overload_neg,
+    '='    => \&overload_copy,
+    '""'   => \&overload_string;
+
+my $constants = { };
+
+sub import {
+  foreach (@_) {
+    if ($_ eq ':constants') {
+      overload::constant ('integer' => \&overload_constant,
+			  'binary'  => \&overload_constant,
+			  'float'   => \&overload_constant);
+    } elsif ($_ eq ':noconstants') {
+      overload::remove_constant ('integer' => \&overload_constant,
+				 'binary'  => \&overload_constant,
+				 'float'   => \&overload_constant);
+    }
+  }
+  goto &Exporter::import;
+}
+
+1;
+__END__
+
+
+# Local variables:
+# perl-indent-level: 2
+# End: