Diff: perltoot(1) - Waikato Linux Users Group

Differences between current version and predecessor to the previous major change of perltoot(1).

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Newer page:	version 2	Last edited on Monday, June 3, 2002 6:50:52 pm	by perry
Older page:	version 1	Last edited on Monday, June 3, 2002 6:50:52 pm	by perry	Revert

@@ -945,9 +945,9 @@

However, there is one particular area where

MI in Perl is rampant: borrowing another

class's class methods. This is rather common, especially

with some bundled ``objectless'' classes, like Exporter,

-DynaLoader, AutoLoader, and SelfLoader. These classes do not

+! DynaLoader, ! AutoLoader, and ! SelfLoader. These classes do not

provide constructors; they exist only so you may inherit

their class methods. (It's not entirely clear why

inheritance was done here rather than traditional module

importation.)

@@ -957,10 +957,10 @@

@ISA:

package POSIX;

-@ISA = qw(Exporter DynaLoader);

-The POSIX module isn't really an object module, but then, neither are Exporter or DynaLoader. They're just lending their classes' behaviours to POSIX .

+@ISA = qw(Exporter ! DynaLoader);

+The POSIX module isn't really an object module, but then, neither are Exporter or ! DynaLoader. They're just lending their classes' behaviours to POSIX .

Why don't people use MI for object methods

much? One reason is that it can have complicated

@@ -1485,9 +1485,9 @@

The need for the our declaration is because what Alias does is play with package globals with the same name as the fields. To use globals while use strict is in effect, you have to predeclare them. These package variables are localized to the block enclosing the ''attr()'' call just as if you'd used a ''local()'' on them. However, that means that they're still considered global variables with temporary values, just as with any other ''local()''.

It would be nice to combine Alias with something like

-Class::Struct or Class::MethodMaker.

+Class::Struct or Class::! MethodMaker.

!!NOTES

__Object Terminology__

@@ -1555,10 +1555,10 @@

Some modules which might prove interesting are

Class::Accessor, Class::Class, Class::Contract,

-Class::Data::Inheritable, Class::MethodMaker and

-Tie::SecureHash

+Class::Data::Inheritable, Class::! MethodMaker and

+Tie::! SecureHash