diff options
author | Norbert Preining <preining@logic.at> | 2010-05-12 16:51:27 +0000 |
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committer | Norbert Preining <preining@logic.at> | 2010-05-12 16:51:27 +0000 |
commit | b645030efc22e13c2498a1522083634ab91b2de1 (patch) | |
tree | c75c7a71998200d419af56eb755dac2f5115b585 /Master/tlpkg/tlperl.old/lib/SelectSaver.pm | |
parent | 44ccd4efc5352f9eb1099ba357708e7b5ff03b83 (diff) |
move tlperl to tlperl.old
git-svn-id: svn://tug.org/texlive/trunk@18209 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/tlperl.old/lib/SelectSaver.pm')
-rw-r--r-- | Master/tlpkg/tlperl.old/lib/SelectSaver.pm | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl.old/lib/SelectSaver.pm b/Master/tlpkg/tlperl.old/lib/SelectSaver.pm new file mode 100644 index 00000000000..1207b88a4a2 --- /dev/null +++ b/Master/tlpkg/tlperl.old/lib/SelectSaver.pm @@ -0,0 +1,54 @@ +package SelectSaver; + +our $VERSION = '1.01'; + +=head1 NAME + +SelectSaver - save and restore selected file handle + +=head1 SYNOPSIS + + use SelectSaver; + + { + my $saver = new SelectSaver(FILEHANDLE); + # FILEHANDLE is selected + } + # previous handle is selected + + { + my $saver = new SelectSaver; + # new handle may be selected, or not + } + # previous handle is selected + +=head1 DESCRIPTION + +A C<SelectSaver> object contains a reference to the file handle that +was selected when it was created. If its C<new> method gets an extra +parameter, then that parameter is selected; otherwise, the selected +file handle remains unchanged. + +When a C<SelectSaver> is destroyed, it re-selects the file handle +that was selected when it was created. + +=cut + +require 5.000; +use Carp; +use Symbol; + +sub new { + @_ >= 1 && @_ <= 2 or croak 'usage: new SelectSaver [FILEHANDLE]'; + my $fh = select; + my $self = bless \$fh, $_[0]; + select qualify($_[1], caller) if @_ > 1; + $self; +} + +sub DESTROY { + my $self = $_[0]; + select $$self; +} + +1; |