On 08/20/2012 07:56 AM, Ángel González wrote:
> On 20/08/12 02:01, Rasmus Lerdorf wrote:
>> I would still like to understand what this generator keyword would
>> actually do. I don't see how it would work. Would a function marked
>> generator somehow not be allowed to return normally or to finish and not
>> return anything? How could this be enforced? I am completely against any
>> keyword that is essentially documentation-only.
>>
>> -Rasmus
> Given that such function could "return several times", seems a different
> enough function type to have its keyword.
> You could not decorate it and rely instead on the presence of the yield
> keyword, but parsers will thank knowing about it from the start rather
> than realising at mid-parsing that the function is a completely
> different beast.
So how about something like this:
generator function f() {
echo "Hello World";
}
generator function f() {
return 1;
}
generator function f($arg) {
if(f!$arg) yield 1;
else if($arg<0) return 1;
else return;
}
What does the generator keyword mean in each of these cases? Anything?
Nothing? Would I see a difference either at compile-time or at execute
time if I left it out?
-Rasmus
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