[ новости /+++ | форум | теги | ]

NAME

     Tie::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.

     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.









Поиск по тексту MAN-ов: 


























Партнёры:










Хостинг:










Закладки на сайте

Проследить за страницей


Created 1996-2024 by Maxim Chirkov

Добавить, Поддержать, Вебмастеру