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Postings from June 2012
On 25 June 2012 22:51, Father Chrysostomos via RT <perlbug-followup@perl.org> wrote: > On Mon Jun 25 13:38:28 2012, rurban wrote: >> On Mon, Jun 25, 2012 at 10:33 AM, Father Chrysostomos via RT >> <perlbug-followup@perl.org> wrote: >> > On Mon Jun 25 07:29:17 2012, rurban wrote: >> >> On Sun Jun 24 22:44:27 2012, doy wrote: >> >> > Fixed in 8b8c1fb. It looks like this was a bug that was fixed during >> >> the >> >> > course of MAD development, but was added back into the core with >> >> #ifdef >> >> > PERL_MAD just because it was different from the existing core code. >> >> > >> >> > (Also, for future reference: 'stub' is the name of the internal perl >> >> > opcode which generates the '()' construct. See �perl -MO=Concise - >> >> E'my >> >> > @x = ()'� for instance.) >> >> >> >> I disagree. >> >> >> >> The error message is not weird, it is consistent with all perls, >> > >> > Not mad builds. >> >> Then make MAD consistent with the default non-mad. > > That could break code for anyone who is using mad. > >> >> >> and it should be an error. >> > >> > Why? If my can take a list, why not an empty one? >> >> my is perl's declaration syntax. It expects one or many lexical >> variable names, not zero. >> lexicals are our default, non lexicals are warned. >> Empty declarations are syntax errors, if "my ();" or "my ;" > > I’m afraid your answer is tautological. Why *shouldn’t* it be allowed > to take an empty list? > > Allowing an empty list provides a clear benefit and makes things more > consistent. What problems could it cause? It would make debugging difficult. Consider generated code, etc. I am with Reini on this one, and ill drag in Larry too. Im pretty sure if Larry thought that my (); should be legal it already would be. That my behaves "a little different" isn't new, we allow the special use of undef in a my() declaration: my ($x,undef,$y)= @l; I contend that allowing my (); would make debugging difficult. I also contend that it is meaningless/absurd to "declare zero items". Does C allow you to write: int; ? Yves -- perl -Mre=debug -e "/just|another|perl|hacker/"Thread Previous | Thread Next