Summary: Create lightweight SCALARs with get/set callbacks

Description:
This module provides a single lvalue function, sentinel, which yields a
scalar that invoke callbacks to get or set its value. Primarily this is
useful to create lvalue object accessors or other functions, to invoke
actual code when a new value is set, rather than simply updating a
scalar variable.

URL: https://metacpan.org/release/Sentinel
License: GPL+ or Artistic

Maintainer: nobody