What does the above quote from perldoc -f use try to say?

Some modules are pragmas. pragams affect the behaviour of code scope in which they are used rather than provide subs.

What kind of ordinary modules has file scope!?

Since you're using "ordinary" to mean not like a pragma, none do by definition.

What exactly might effective through the end of file refer to?

It equates end of file with end of the package, and thus to the end of the visibility of the imported functions.

In reply to Re^4: Using use itself -- file scope !? by ikegami
in thread Using constants... by willjones

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