Safely and Cleanly Create Closures Via String Eval
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's easy to miss compilation errors, since eval
catches them and sticks them in $@ instead.
This module attempts to solve these problems. It provides an 'eval_closure'
function, which evals a string in a clean environment, other than a fixed
list of specified variables. Compilation errors are rethrown automatically.
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