(GPL-1.0-or-later or Artistic-1.0-perl) and MIT and UCD
Sub::Identify allows you to retrieve the real name of code references. For this, it uses Perl's introspection mechanism, provided by the B module.
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This package is the shared library for perl.
Common Scalar and List utility subroutines
This package contains a selection of subroutines that people have expressed would be nice to have in the perl core, but the usage would not really be high enough to warrant the use of a keyword, and the size so small such that being individual extensions would be wasteful.
The Carp routines are useful in your own modules because they act like die() or warn(), but with a message which is more likely to be useful to a user of your module. In the case of cluck, confess, and longmess that context is a summary of every call in the call-stack. For a shorter message you can use carp or croak which report the error as being from where your module was called. There is no guarantee that that is where the error was, but it is a good educated guess.
When subclassing a class, you occasionally want to dispatch control to the superclass - at least conditionally and temporarily. This module provides an easier, cleaner way for class methods to access their ancestor's implementation.