Documented in perldata, somewhere under "Scalar value constructors":

The special literals __FILE__, __LINE__, and __PACKAGE__ represent the current filename, line number, and package name at that point in your program. They may be used only as separate tokens; they will not be interpolated into strings. If there is no current package (due to an empty package; directive), __PACKAGE__ is the undefined value.

In reply to Re: Equivalent of C by bart
in thread Equivalent of C by limartin

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