base(3)

NAME

       base - Establish IS-A relationship with base class at compile time

SYNOPSIS

           package Baz;
           use base qw(Foo Bar);

DESCRIPTION

       Roughly similar in effect to

           BEGIN {
               require Foo;
               require Bar;
               push @ISA, qw(Foo Bar);
           }

       Will also initialize the %FIELDS hash if one of the base classes has
       it.  Multiple inheritance of %FIELDS is not supported.  The 'base'
       pragma will croak if multiple base classes have a %FIELDS hash.  See
       fields for a description of this feature.

       When strict 'vars' is in scope base also let you assign to @ISA without
       having to declare @ISA with the 'vars' pragma first.

       If any of the base classes are not loaded yet, base silently "require"s
       them.  Whether to "require" a base class package is determined by the
       absence of a global $VERSION in the base package.  If $VERSION is not
       detected even after loading it, <base> will define $VERSION in the base
       package, setting it to the string "-1, set by base.pm".

HISTORY

       This module was introduced with Perl 5.004_04.

SEE ALSO

       fields

perl v5.8.0                       2002-06-01                           base(3)