Output(3) User Contributed Perl Documentation Output(3)NAMESGMLS::Output - Stack-based Output Procedures
SYNOPSIS
use SGMLS::Output;
To print a string to the current output destination:
output($data);
To push a new output level to the filehandle DATA:
push_output('handle',DATA);
To push a new output level to the file "foo.data" (which will be opened
and closed automatically):
push_output('file','foo.data');
To push a new output level to a pipe to the shell command "sort":
push_output('pipe','sort');
To push a new output level appending to the file "foo.data":
push_output('append','foo.data');
To push a new output level to an empty string:
push_output('string');
To push a new output level appending to the string "David is ":
push_output('string',"David is ");
To push a new output level to The Great Beyond:
push_output('nul');
To revert to the previous output level:
pop_output();
To revert to the previous output level, returning the contents of an
output string:
$data = pop_output();
DESCRIPTION
This library allows redirectable, stack-based output to files, pipes,
handles, strings, or nul. It is especially useful for packages like
SGMLS, since handlers for individual SGML elements can temporarily
change and restore the default output destination. It is also
particularly useful for capturing the contents of an element (and its
sub-elements) in a string.
Example:
sgmls('<title>', sub{ push_output('string'); });
sgmls('</title>', sub{ $title = pop_output(); });
In between, anything sent to output (such as CDATA) will be accumulated
in the string returned from pop_output().
Example:
sgmls('<tei.header>', sub { push_output('nul'); });
sgmls('</tei.header>', sub { pop_output(); });
All output will be ignored until the header has finished.
AUTHOR AND COPYRIGHT
Copyright 1994 and 1995 by David Megginson, "dmeggins@aix1.uottawa.ca".
Distributed under the terms of the Gnu General Public License (version
2, 1991) -- see the file "COPYING" which is included in the SGMLS.pm
distribution.
SEE ALSO:
SGMLS.
perl v5.18.0 2013-07-09 Output(3)
