Carp::Ensure

One useful feature of Perl is its lack of strict type checking, unlike in C++. However, sometimes it is necessary to ensure that subroutines receive the expected type of arguments or return expected values. That is where the Carp::Ensure module comes in handy. With this module, you can check that every value has the type you expect, and fine-tune the type checking from basic checks to more detailed checks.

The module includes checking routines for commonly used types, but you may also add your own checking routines to suit your program's specific needs. The types are described by a simple grammar, which picks up what you already know from the Perl type system.

The synopsis of the module includes examples of how to use it, including checking for specific types in debug mode, checking arrays and hashes, and ensuring parameters are of a certain type or undefined. The subroutines are also checked to ensure they receive the expected arguments.

Overall, the Carp::Ensure module is a useful tool for ensuring that your code is functioning as expected and receiving the appropriate inputs and outputs.