Mail::Message::Head::Delayed(3)            User Contributed Perl Documentation


NAME
       Mail::Message::Head::Delayed - a not-read header of a Mail::Message

INHERITANCE
        Mail::Message::Head::Delayed realizes a Mail::Message::Head::Complete

        Mail::Message::Head::Delayed
          is a Mail::Message::Head
          is a Mail::Reporter

SYNOPSIS
         my $delayed = Mail::Message::Head::Delayed->new(...)
         $delayed->isa('Mail::Message::Head')  # true
         $delayed->guessBodySize               # undef
         $delayed->isDelayed                   # true

DESCRIPTION
       This object is used as place-holder, to be replaced by a
       Mail::Message::Head when someone accesses the header of a message.

       Extends "DESCRIPTION" in Mail::Message::Head.

OVERLOADED
       Extends "OVERLOADED" in Mail::Message::Head.

       overload: "" stringifaction
           Inherited, see "OVERLOADED" in Mail::Message::Head

       overload: bool true/false
           Inherited, see "OVERLOADED" in Mail::Message::Head

METHODS
       Extends "METHODS" in Mail::Message::Head.

   Constructors
       Extends "Constructors" in Mail::Message::Head.

       $class->build($fields)
           You cannot create a delayed header with fields.  Improves base, see
           "Constructors" in Mail::Message::Head

       $class->new(%options)
           Inherited, see "Constructors" in Mail::Message::Head

   Attributes
       Extends "Attributes" in Mail::Message::Head.

   The header
       Extends "The header" in Mail::Message::Head.

       $obj->isDelayed()
           Inherited, see "The header" in Mail::Message::Head

       $obj->isEmpty()
           Inherited, see "The header" in Mail::Message::Head

       $obj->isModified()
           Inherited, see "The header" in Mail::Message::Head

       $obj->knownNames()
           Inherited, see "The header" in Mail::Message::Head

       $obj->message( [$message] )
           Inherited, see "The header" in Mail::Message::Head

       $obj->modified( [BOOLEAN] )
           Inherited, see "The header" in Mail::Message::Head

       $obj->orderedFields()
           Inherited, see "The header" in Mail::Message::Head

   Access to the header
       Extends "Access to the header" in Mail::Message::Head.

       $obj->get( $name, [$index] )
           Get the information about the header line $name.  Realization will
           take place.  Improves base, see "Access to the header" in
           Mail::Message::Head

       $obj->study( $name, [$index] )
           Inherited, see "Access to the header" in Mail::Message::Head

   About the body
       Extends "About the body" in Mail::Message::Head.

       $obj->guessBodySize()
           On a delayed head, this returns "undef", because when there is no
           header there is also no body.

           For messages in directory or network organized folders,
           Mail::Message::size() usually will give a figure for the whole
           message without much cost.  Subtract a few hundred bytes for the
           header, and you will get a good estimate.  Improves base, see
           "About the body" in Mail::Message::Head

       $obj->guessTimeStamp()
           Make a guess about when the message was originally posted.  On a
           delayed head, this returns "undef".  For messages in directory or
           network organized folders, Mail::Message::timestamp() usually will
           give a figure without much cost.

       $obj->isMultipart()
           Inherited, see "About the body" in Mail::Message::Head

   Internals
       Extends "Internals" in Mail::Message::Head.

       $obj->addNoRealize($field)
           Inherited, see "Internals" in Mail::Message::Head

       $obj->addOrderedFields($fields)
           Inherited, see "Internals" in Mail::Message::Head

       $obj->fileLocation()
           Inherited, see "Internals" in Mail::Message::Head

       $obj->load()
           Inherited, see "Internals" in Mail::Message::Head

       $obj->moveLocation($distance)
           Inherited, see "Internals" in Mail::Message::Head

       $obj->read($parser)
           Inherited, see "Internals" in Mail::Message::Head

       $obj->setNoRealize($field)
           Not possible.  Improves base, see "Internals" in
           Mail::Message::Head

   Error handling
       Extends "Error handling" in Mail::Message::Head.

       $obj->AUTOLOAD()
           Inherited, see "Error handling" in Mail::Reporter

       $obj->notImplemented()
           Inherited, see "Error handling" in Mail::Reporter

   Cleanup
       Extends "Cleanup" in Mail::Message::Head.

       $obj->DESTROY()
           Inherited, see "Cleanup" in Mail::Reporter

DETAILS
       Extends "DETAILS" in Mail::Message::Head.

DIAGNOSTICS
       Error: attempt to set field on a delayed header.
           Cast by setNoRealize()

       Error: cannot build() a delayed header.
           A delayed message header cannot contain any information, so cannot
           be build.  You can construct complete or subset headers.  Cast by
           build()

       Error: class $package does not implement method $method.
           Fatal error: the specific $package (or one of its superclasses)
           does not implement this method where it should. This message means
           that some other related classes do implement this method however
           the class at hand does not.  Probably you should investigate this
           and probably inform the author of the package.  Cast by
           notImplemented()

SEE ALSO
       This module is part of Mail-Box version 4.02, built on April 10, 2026.
       Website: http://perl.overmeer.net/CPAN/

LICENSE
       For contributors see file ChangeLog.

       This software is copyright (c) 2001-2026 by Mark Overmeer.

       This is free software; you can redistribute it and/or modify it under
       the same terms as the Perl 5 programming language system itself.

perl v5.42.2                      2026-04-11   Mail::Message::Head::Delayed(3)