accessors::ro - create 'classic' read-only accessor methods in caller's package.

       Steve Purkis <spurkis@cpan.org>

       Classes  using  blessed  scalarrefs,  arrayrefs,  etc.  are  not  supported for sake of simplicity.  Only
       hashrefs are supported.

       The accessors::ro pragma lets you create simple classic read-only accessors at compile-time.

       The generated methods look like this:

         sub foo {
             my $self = shift;
             return $self->{foo};
         }

       They always return the current value, just like accessors::ro.

       accessors::ro - create 'classic' read-only accessor methods in caller's package.

       There is little-to-noperformacehit when using generated accessors; in fact there is usuallyaperformancegain.

       •   typically 5-15%faster than hard-coded accessors (like the above example).

       •   typically 0-15%slower than optimized accessors (less readable).

       •   typically a small performance hit at startup (accessors are created at compile-time).

       •   uses the same anonymous sub to reduce memory consumption (sometimes by 80%).

       See the benchmark tests included with this distribution for more details.

       accessors, accessors::rw, accessors::classic, accessors::chained, base

perl v5.36.0                                       2022-10-13                                 accessors::ro(3pm)

         package Foo;
         use accessors::ro qw( foo bar baz );

         my $obj = bless { foo => 'read only? ' }, 'Foo';

         # values are read-only, so set is disabled:
         print "oh my!\n" if $obj->foo( "set?" ) eq 'read only? ';

         # if you really need to change the vars,
         # you must use direct-variable-access:
         $obj->{bar} = 'i need a drink ';
         $obj->{baz} = 'now';

         # always returns the current value:
         print $obj->foo, $obj->bar, $obj->baz, "!\n";