"use constant" defines constants something like this:
sub NAME() { return 42;}
The prototype prevents anything following a reference to the constant from being accepted as an argument. What's more, Perl will inline the function call if the return value is a constant _expression_ in most cases. The Posix module is almost entirely in XS, and clearly the part that defines the constants does not use prototypes.
--
Eric Amick
Columbia, MD
Eric Amick
Columbia, MD
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