Class::WhiteHole(3) User Contributed Perl Documentation Class::WhiteHole(3)NAME
Class::WhiteHole - base class to treat unhandled method calls as errors
SYNOPSIS
package Bar;
# DBI inherits from DynaLoader which inherits from AutoLoader
# Bar wants to avoid this accidental inheritance of AutoLoader.
use base qw(Class::WhiteHole DBI);
DESCRIPTION
Its possible to accidentally inherit an AUTOLOAD method. Often this will happen if a class somewhere in the chain uses AutoLoader or
defines one of their own. This can lead to confusing error messages when method lookups fail.
Sometimes you want to avoid this accidental inheritance. In that case, inherit from Class::WhiteHole. All unhandled methods will produce
normal Perl error messages.
BUGS &; CAVEATS
Be sure to have Class::WhiteHole before the class from which you're inheriting AUTOLOAD in the ISA. Usually you'll want Class::WhiteHole
to come first.
If your class inherits autoloaded routines this class may cause them to stop working. Choose wisely before using.
White holes are only a hypothesis and may not really exist.
COPYRIGHT
Copyright 2000 Michael G Schwern <schwern@pobox.com> all rights reserved. This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
AUTHOR
Michael G Schwern <schwern@pobox.com>
SEE ALSO
Class::BlackHole
perl v5.12.1 2003-05-28 Class::WhiteHole(3)
Check Out this Related Man Page
Class::Accessor::Fast(3) User Contributed Perl Documentation Class::Accessor::Fast(3)NAME
Class::Accessor::Fast - Faster, but less expandable, accessors
SYNOPSIS
package Foo;
use base qw(Class::Accessor::Fast);
# The rest is the same as Class::Accessor but without set() and get().
DESCRIPTION
This is a faster but less expandable version of Class::Accessor. Class::Accessor's generated accessors require two method calls to
accompish their task (one for the accessor, another for get() or set()). Class::Accessor::Fast eliminates calling set()/get() and does the
access itself, resulting in a somewhat faster accessor.
The downside is that you can't easily alter the behavior of your accessors, nor can your subclasses. Of course, should you need this
later, you can always swap out Class::Accessor::Fast for Class::Accessor.
Read the documentation for Class::Accessor for more info.
EFFICIENCY
"EFFICIENCY" in Class::Accessor for an efficiency comparison.
AUTHORS
Copyright 2007 Marty Pauley <marty+perl@kasei.com>
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. That means either (a) the GNU
General Public License or (b) the Artistic License.
ORIGINAL AUTHOR
Michael G Schwern <schwern@pobox.com>
SEE ALSO
Class::Accessor
perl v5.16.2 2009-09-15 Class::Accessor::Fast(3)
Hi,
In multi-level inheritance:
class A {
public:
void fun() { cout << "A" << endl; }
};
class B : public A {
public:
void fun() { cout << "A" << endl; }
};
class C : public B { };
int main() {
C c;
c.fun(); // Ans: A
} (1 Reply)
When I try to save the configuration for the wireless settings of RHEL 5.9 Network Manager it throws an unhandled exception with the following detail.
Component: system-config-network
Version: 1.3.99.21
Summary: TBf6c835f4 NCHardwareList.py:482:save:AttributeError: HwWireless instance has no... (4 Replies)
Hello All,
I am a learner in C++. I was testing my inheritance knowledge with following piece of code.
#include <iostream>
using namespace std;
class base
{
public :
void display()
{
cout << "In base display()" << endl;
}
void display(int k)
{... (2 Replies)