Tie::Handle(3) Perl Programmers Reference Guide Tie::Handle(3)NAMETie::Handle - base class definitions for tied handles
SYNOPSIS
package NewHandle;
require Tie::Handle;
@ISA = (Tie::Handle);
sub READ { ... } # Provide a needed method
sub TIEHANDLE { ... } # Overrides inherited method
package main;
tie *FH, 'NewHandle';
DESCRIPTION
This module provides some skeletal methods for handle-
tying classes. See the perltie manpage for a list of the
functions required in tying a handle to a package. The
basic Tie::Handle package provides a new method, as well
as methods TIESCALAR, FETCH and STORE. The new method is
provided as a means of grandfathering, for classes that
forget to provide their own TIESCALAR method.
For developers wishing to write their own tied-handle
classes, the methods are summarized below. The the perltie
manpage section not only documents these, but has sample
code as well:
TIEHANDLE classname, LIST
The method invoked by the command tie *glob,
classname. Associates a new glob instance with the
specified class. LIST would represent additional
arguments (along the lines of the AnyDBM_File manpage
and compatriots) needed to complete the association.
WRITE this, scalar, length, offset
Write length bytes of data from scalar starting at
offset.
PRINT this, LIST
Print the values in LIST
PRINTF this, format, LIST
Print the values in LIST using format
READ this, scalar, length, offset
Read length bytes of data into scalar starting at
offset.
16/Sep/1999 perl 5.005, patch 03 1
Tie::Handle(3) Perl Programmers Reference Guide Tie::Handle(3)
READLINE this
Read a single line
GETC this
Get a single character
DESTROY this
Free the storage associated with the tied handle
referenced by this. This is rarely needed, as Perl
manages its memory quite well. But the option exists,
should a class wish to perform specific actions upon
the destruction of an instance.
MORE INFORMATION
The the perltie manpage section contains an example of
tying handles.
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