Install libclass-contract-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libclass-contract-perl
Description:
Perl Design-by-Contract OO module
The Class::Contract module implements strong encapsulation, static inheritance, and design-by-contract condition checking for object-oriented Perl. The module provides a declarative syntax for attribute, method, constructor, and destructor definitions at both the object and class level. Pre-conditions, post-conditions, and class invariants are also fully supported.
Homepage: https://metacpan.org/release/Class-Contract
Version: 1.14-8
Section: universe/perl