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Postings from January 2011
> The only exception for non-core-like functions that I find
> sensible is using the empty prototype for constant functions:
> $ perl -wE 'sub FOO {3}; say FOO+1'
> 3
> $ perl -wE 'sub FOO () {3}; say FOO+1'
> 4
> Without the prototype the "FOO+1" is parsed as "FOO(+1)"
> instead of "FOO()+1".
Even that is only if you just happen to have a forward
declaration of the function. Otherwise it's a filehandle
literal in the dative slot:
% perl -wE 'say FOO+1; sub FOO {3}'
say() on unopened filehandle FOO at -e line 1.
% perl -wE 'say FOO(+1); sub FOO {3}'
3
% perl -wE 'say FOO()+1; sub FOO {3}'
4
--tom
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