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# Copyright (C) 2001-2018 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, 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 General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see <https://www.gnu.org/licenses/>. package Automake::General; use 5.006; use strict; use Exporter; use File::Basename; use vars qw (@ISA @EXPORT); @ISA = qw (Exporter); @EXPORT = qw (&uniq &none $me); # Variable we share with the main package. Be sure to have a single # copy of them: using 'my' together with multiple inclusion of this # package would introduce several copies. use vars qw ($me); $me = basename ($0); # END # --- # Exit nonzero whenever closing STDOUT fails. sub END { # This is required if the code might send any output to stdout # E.g., even --version or --help. So it's best to do it unconditionally. if (! close STDOUT) { print STDERR "$me: closing standard output: $!\n"; $? = 74; # EX_IOERR return; } } # @RES # uniq (@LIST) # ------------ # Return LIST with no duplicates. sub uniq (@) { my @res = (); my %seen = (); foreach my $item (@_) { if (! exists $seen{$item}) { $seen{$item} = 1; push (@res, $item); } } return wantarray ? @res : "@res"; } # $RES # none (&PRED, @LIST) # ------------ # Return 1 when no element in LIST satisfies predicate PRED otherwise 0. sub none (&@) { my ($pred, @list) = @_; my $res = 1; foreach my $item (@list) { if ($pred->($item)) { $res = 0; last; } } return $res; } 1; # for require
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