The vars pragma does more than "exempting" variables from the strict pragma. It creates an entry in the current package's symbol table for the named variable.

That's important, because it's how you locate variables inside a package. (Variables declared with my or localized are bound to a particular lexical scope -- they don't live in the symbol table. I'm simplifying things here by ignoring what happens when you localize a variable in the symbol table.)

The upshot of it is, import works by creating an alias in the current package's symbol table to point to a thingie in another package's symbol table.

Since lexical variables don't live in a symbol table, that doesn't work.

The important thing to remember is that namespaces use symbol tables, which are not the same thing as lexical scopes. I can get away with this jargon because you mention the Camel. :)

In reply to Re: use strict and exporting package variables by chromatic
in thread use strict and exporting package variables by Anonymous Monk

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