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.TH base 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
base \- Establish IS\-A relationship with base classes at compile time
Allows you to both load one or more modules, while setting up inheritance from
those modules at the same time. Roughly similar in effect to
\& push @ISA, qw(Foo Bar);
If any of the listed modules are not loaded yet, \fIbase\fR silently attempts to
\&\f(CW\*(C`require\*(C'\fR them (and silently continues if the \f(CW\*(C`require\*(C'\fR failed). Whether to
\&\f(CW\*(C`require\*(C'\fR a base class module is determined by the absence of a global variable
\&\f(CW$VERSION\fR in the base package. If \f(CW$VERSION\fR is not detected even after loading
it, <base> will define \f(CW$VERSION\fR in the base package, setting it to the string
\&\f(CW\*(C`\-1, set by base.pm\*(C'\fR.
Will also initialize the fields if one of the base classes has it.
Multiple inheritence of fields is \fB\s-1NOT\s0\fR supported, if two or more
base classes each have inheritable fields the 'base' pragma will
croak. See fields, public and protected for a description of
.ie n .IP "Base class package ""%s"" is empty." 4
.el .IP "Base class package ``%s'' is empty." 4
.IX Item "Base class package %s is empty."
base.pm was unable to require the base package, because it was not
This module was introduced with Perl 5.004_04.
Due to the limitations of the implementation, you must use
base \fIbefore\fR you declare any of your own fields.