Front page | perl.perl5.porters |
Postings from July 2010
On Thu, Jul 15, 2010 at 3:43 PM, Jan Dubois <jand@activestate.com> wrote: > On Thu, 15 Jul 2010, Jan Dubois wrote: >> On Thu, 15 Jul 2010, David Golden wrote: >> Precedence and associativity are all about how the parser would insert >> parenthesis into an expression to disambiguate its meaning; it does not >> for example change the commutative property of addition: (a + b) has to >> be the same as (b + a), otherwise the operation is no longer an addition. > > Please ignore the part about the commutative property. While true, it is > unrelated to the rest of the argument in that post. Sorry about that. I was amusedly thinking that it's not guaranteed to hold true when "evaluating" "a" and "b" have magic anyway. (e.g. "a" is tied to increment when evaluated and "b" is tied to do something as a function of a. And then we come full circle to the debate that spawned this thread about what can be assumed about order of evalution. :-) -- DavidThread Previous | Thread Next