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.IX Title "Mail::Message::Head::Delayed 3"
.TH Mail::Message::Head::Delayed 3 2026-04-11 "perl v5.42.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
Mail::Message::Head::Delayed \- a not\-read header of a Mail::Message
.SH INHERITANCE
.IX Header "INHERITANCE"
.Vb 1
\& Mail::Message::Head::Delayed realizes a Mail::Message::Head::Complete
\&
\& Mail::Message::Head::Delayed
\&   is a Mail::Message::Head
\&   is a Mail::Reporter
.Ve
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 4
\&  my $delayed = Mail::Message::Head::Delayed\->new(...)
\&  $delayed\->isa(\*(AqMail::Message::Head\*(Aq)  # true
\&  $delayed\->guessBodySize               # undef
\&  $delayed\->isDelayed                   # true
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
This object is used as place\-holder, to be replaced
by a Mail::Message::Head when someone accesses the header of a message.
.PP
Extends "DESCRIPTION" in Mail::Message::Head.
.SH OVERLOADED
.IX Header "OVERLOADED"
Extends "OVERLOADED" in Mail::Message::Head.
.IP "overload: \fB""""\fR stringifaction" 4
.IX Item "overload: """" stringifaction"
Inherited, see "OVERLOADED" in Mail::Message::Head
.IP "overload: \fBbool\fR true/false" 4
.IX Item "overload: bool true/false"
Inherited, see "OVERLOADED" in Mail::Message::Head
.SH METHODS
.IX Header "METHODS"
Extends "METHODS" in Mail::Message::Head.
.SS Constructors
.IX Subsection "Constructors"
Extends "Constructors" in Mail::Message::Head.
.ie n .IP $class\->\fBbuild\fR($fields) 4
.el .IP \f(CW$class\fR\->\fBbuild\fR($fields) 4
.IX Item "$class->build($fields)"
You cannot create a delayed header with fields.
Improves base, see "Constructors" in Mail::Message::Head
.ie n .IP $class\->\fBnew\fR(%options) 4
.el .IP \f(CW$class\fR\->\fBnew\fR(%options) 4
.IX Item "$class->new(%options)"
Inherited, see "Constructors" in Mail::Message::Head
.SS Attributes
.IX Subsection "Attributes"
Extends "Attributes" in Mail::Message::Head.
.SS "The header"
.IX Subsection "The header"
Extends "The header" in Mail::Message::Head.
.ie n .IP $obj\->\fBisDelayed\fR() 4
.el .IP \f(CW$obj\fR\->\fBisDelayed\fR() 4
.IX Item "$obj->isDelayed()"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP $obj\->\fBisEmpty\fR() 4
.el .IP \f(CW$obj\fR\->\fBisEmpty\fR() 4
.IX Item "$obj->isEmpty()"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP $obj\->\fBisModified\fR() 4
.el .IP \f(CW$obj\fR\->\fBisModified\fR() 4
.IX Item "$obj->isModified()"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP $obj\->\fBknownNames\fR() 4
.el .IP \f(CW$obj\fR\->\fBknownNames\fR() 4
.IX Item "$obj->knownNames()"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP "$obj\->\fBmessage\fR( [$message] )" 4
.el .IP "\f(CW$obj\fR\->\fBmessage\fR( [$message] )" 4
.IX Item "$obj->message( [$message] )"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP "$obj\->\fBmodified\fR( [BOOLEAN] )" 4
.el .IP "\f(CW$obj\fR\->\fBmodified\fR( [BOOLEAN] )" 4
.IX Item "$obj->modified( [BOOLEAN] )"
Inherited, see "The header" in Mail::Message::Head
.ie n .IP $obj\->\fBorderedFields\fR() 4
.el .IP \f(CW$obj\fR\->\fBorderedFields\fR() 4
.IX Item "$obj->orderedFields()"
Inherited, see "The header" in Mail::Message::Head
.SS "Access to the header"
.IX Subsection "Access to the header"
Extends "Access to the header" in Mail::Message::Head.
.ie n .IP "$obj\->\fBget\fR( $name, [$index] )" 4
.el .IP "\f(CW$obj\fR\->\fBget\fR( \f(CW$name\fR, [$index] )" 4
.IX Item "$obj->get( $name, [$index] )"
Get the information about the header line \f(CW$name\fR.  Realization will
take place.
Improves base, see "Access to the header" in Mail::Message::Head
.ie n .IP "$obj\->\fBstudy\fR( $name, [$index] )" 4
.el .IP "\f(CW$obj\fR\->\fBstudy\fR( \f(CW$name\fR, [$index] )" 4
.IX Item "$obj->study( $name, [$index] )"
Inherited, see "Access to the header" in Mail::Message::Head
.SS "About the body"
.IX Subsection "About the body"
Extends "About the body" in Mail::Message::Head.
.ie n .IP $obj\->\fBguessBodySize\fR() 4
.el .IP \f(CW$obj\fR\->\fBguessBodySize\fR() 4
.IX Item "$obj->guessBodySize()"
On a delayed head, this returns \f(CW\*(C`undef\*(C'\fR, because when there is no header
there is also no body.
.Sp
For messages in directory or network organized folders,
\&\fBMail::Message::size()\fR 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
.ie n .IP $obj\->\fBguessTimeStamp\fR() 4
.el .IP \f(CW$obj\fR\->\fBguessTimeStamp\fR() 4
.IX Item "$obj->guessTimeStamp()"
Make a guess about when the message was originally posted.
On a delayed head, this returns \f(CW\*(C`undef\*(C'\fR.
For messages in directory or network organized folders,
\&\fBMail::Message::timestamp()\fR usually will give a figure without much cost.
.ie n .IP $obj\->\fBisMultipart\fR() 4
.el .IP \f(CW$obj\fR\->\fBisMultipart\fR() 4
.IX Item "$obj->isMultipart()"
Inherited, see "About the body" in Mail::Message::Head
.SS Internals
.IX Subsection "Internals"
Extends "Internals" in Mail::Message::Head.
.ie n .IP $obj\->\fBaddNoRealize\fR($field) 4
.el .IP \f(CW$obj\fR\->\fBaddNoRealize\fR($field) 4
.IX Item "$obj->addNoRealize($field)"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBaddOrderedFields\fR($fields) 4
.el .IP \f(CW$obj\fR\->\fBaddOrderedFields\fR($fields) 4
.IX Item "$obj->addOrderedFields($fields)"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBfileLocation\fR() 4
.el .IP \f(CW$obj\fR\->\fBfileLocation\fR() 4
.IX Item "$obj->fileLocation()"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBload\fR() 4
.el .IP \f(CW$obj\fR\->\fBload\fR() 4
.IX Item "$obj->load()"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBmoveLocation\fR($distance) 4
.el .IP \f(CW$obj\fR\->\fBmoveLocation\fR($distance) 4
.IX Item "$obj->moveLocation($distance)"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBread\fR($parser) 4
.el .IP \f(CW$obj\fR\->\fBread\fR($parser) 4
.IX Item "$obj->read($parser)"
Inherited, see "Internals" in Mail::Message::Head
.ie n .IP $obj\->\fBsetNoRealize\fR($field) 4
.el .IP \f(CW$obj\fR\->\fBsetNoRealize\fR($field) 4
.IX Item "$obj->setNoRealize($field)"
Not possible.
Improves base, see "Internals" in Mail::Message::Head
.SS "Error handling"
.IX Subsection "Error handling"
Extends "Error handling" in Mail::Message::Head.
.ie n .IP $obj\->\fBAUTOLOAD\fR() 4
.el .IP \f(CW$obj\fR\->\fBAUTOLOAD\fR() 4
.IX Item "$obj->AUTOLOAD()"
Inherited, see "Error handling" in Mail::Reporter
.ie n .IP $obj\->\fBnotImplemented\fR() 4
.el .IP \f(CW$obj\fR\->\fBnotImplemented\fR() 4
.IX Item "$obj->notImplemented()"
Inherited, see "Error handling" in Mail::Reporter
.SS Cleanup
.IX Subsection "Cleanup"
Extends "Cleanup" in Mail::Message::Head.
.ie n .IP $obj\->\fBDESTROY\fR() 4
.el .IP \f(CW$obj\fR\->\fBDESTROY\fR() 4
.IX Item "$obj->DESTROY()"
Inherited, see "Cleanup" in Mail::Reporter
.SH DETAILS
.IX Header "DETAILS"
Extends "DETAILS" in Mail::Message::Head.
.SH DIAGNOSTICS
.IX Header "DIAGNOSTICS"
.IP "Error: attempt to set field on a delayed header." 4
.IX Item "Error: attempt to set field on a delayed header."
Cast by \f(CWsetNoRealize()\fR
.IP "Error: cannot \fBbuild()\fR a delayed header." 4
.IX Item "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 \f(CWbuild()\fR
.ie n .IP "Error: class $package does not implement method $method." 4
.el .IP "Error: class \f(CW$package\fR does not implement method \f(CW$method\fR." 4
.IX Item "Error: class $package does not implement method $method."
Fatal error: the specific \f(CW$package\fR (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 \f(CWnotImplemented()\fR
.SH "SEE ALSO"
.IX Header "SEE ALSO"
This module is part of Mail\-Box version 4.02,
built on April 10, 2026. Website: \fIhttp://perl.overmeer.net/CPAN/\fR
.SH LICENSE
.IX Header "LICENSE"
For contributors see file ChangeLog.
.PP
This software is copyright (c) 2001\-2026 by Mark Overmeer.
.PP
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.