(GPL-1.0-or-later or Artistic-1.0-perl) and MIT and UCD
This package is the shared library for perl.
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The functions exported by this module deal with runtime handling of Perl modules, which are normally handled at compile time. This module avoids using any other modules, so that it can be used in low-level infrastructure
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.
Minimal try/catch with proper preservation of $@
This module provides bare bones try/catch statements that are designed to minimize common mistakes with eval blocks, and NOTHING else.
Loads one of several alternate underlying implementations for a module
This module abstracts out the process of choosing one of several underlying implementations for a module. This can be used to provide XS and pure Perl implementations of a module, or it could be used to load an implementation for a given OS or any other case of needing to provide multiple implementations.