Lexically disable autovivification
When an undefined variable is dereferenced, it gets silently upgraded to an array or hash reference (depending of the type of the dereferencing). This behaviour is called autovivification and usually does what you mean but it may be unnatural or surprising because your variables get populated behind your back. This is especially true when several levels of dereferencing are involved, in which case all levels are vivified up to the last, or when it happens in intuitively read-only constructs like
exists. The pragma provided by this package lets you disable autovivification for some constructs and optionally throws a warning or an error when it would have happened.
- Website: https://metacpan.org/release/autovivification
- Licenses: GPL 1+
- Package source: gnu/packages/perl.scm
- Builds: See build status
- Issues: See known issues
perl-autovivification 0.18 as follows:
guix install email@example.com
Or install the latest version:
guix install perl-autovivification
You can also install packages in augmented, pure or containerized environments for development or simply to try them out without polluting your user profile. See the
guix shell documentation for more information.