Help language development. Donate to The Perl Foundation
Hash::Restricted - trait for restricting keys in hashes
use Hash::Restricted;
my %h is restricted = a => 42, b => 666;
%h<c> = 317; # dies
my %h is restricted<a b>;
%h<a> = 42;
%h<b> = 666;
%h<c> = 317; # dies
Hash::Restricted provides a is restricted trait on Maps and Hashes as an easy way to restrict which keys are going to be allowed in the Map / Hash.
If you do not specify any keys with is restricted, it will limit to the keys that were specified when the Map / Hash was initialized.
If you do specify keys, then those will be the keys that will be allowed.
Elizabeth Mattijsen [email protected]
Source can be located at: https://github.com/lizmat/Hash-Restricted . Comments and Pull Requests are welcome.
Copyright 2018, 2020 Elizabeth Mattijsen
This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.