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perl-Eval-Closure - Safely and cleanly create closures via string eval

Description:

String eval is often used for dynamic code generation. For instance, Moose uses
it heavily, to generate inlined versions of accessors and constructors, which
speeds code up at runtime by a significant amount. String eval is not without
its issues however - it's difficult to control the scope it's used in (which
determines which variables are in scope inside the eval), and it can be quite
slow, especially if doing a large number of evals.

This module attempts to solve both of those problems. It provides an
eval_closure function, which evals a string in a clean environment, other than
a fixed list of specified variables. It also caches the result of the eval, so
that doing repeated evals of the same source, even with a different
environment, will be much faster (but note that the description is part of the
string to be evaled, so it must also be the same (or non-existent) if caching
is to work properly).

Packages

- Update to 0.11
  - Support lexical subs on 5.18+
  - Fix pod links
  - Add "alias => 1" option for making closure variables actually alias the
    closed over variables (so the variable referenced in the environment
    hashref will actually be updated by changes made in the closure)
- Classify buildreqs by usage
- Use %license
- Make %files list more explicit
- Update %description
- Don't need to remove empty directories from the buildroot

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