ActivePerl Documentation
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Getting Started
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SGMLS::Output - Stack-based Output Procedures |
NAME
SGMLS::Output - Stack-based Output Procedures
SUPPORTED PLATFORMS
- Windows
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 the SGMLS manpage, 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:
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SGMLS::Output - Stack-based Output Procedures |