Re: RFC: Is there more to alias?

POD seemed to imply this wasn't supported (by not saying it was), but I wanted to ask in case it was obvious... can implicit assignment to $_ be aliased? As in

for alias my $line (<DATA>) {}
[download]

I'd probably never want to alias $_, just a curiosity.

I don't see anything about filehandles in the POD, either, as in

alias my $line = <DATA>;
while ( defined( alias my $line = <DATA> ) ) {}
[download]

I'm not sure what I'd expect from the first, but the second involves another implicit assignment to $_. Would that work as 'expected'?

Deref is especially cool and I look forward to that very much. ++

--Solo

--
You said you wanted to be around when I made a mistake; well, this could be it, sweetheart.

Comment on Re: RFC: Is there more to alias? Select or Download Code

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Re^2: RFC: Is there more to alias? by Solo (Deacon) on Aug 25, 2004 at 16:59 UTC
Attempting to follow xmath's advice and try myself. Unfortunately, I'm out of my league with xs compilation errors. (I can build Date::Calc, so it's not an environment problem.) Are there compiler options I'm missing? Read more... (6 kB)	[reply] [d/l]
Re^3: RFC: Is there more to alias? by xmath (Hermit) on Aug 25, 2004 at 18:05 UTC
I think I've fixed the problem, and I've uploaded a fresh version. See if this helps. As for your original questions.. I have read your original post several times, and I have honestly no idea what you're trying to accomplish.... `for alias my $line (<DATA>) {}` This is a syntax error. And "for" already aliases, so what's the deal here? On top of that, why would you need an alias to the temporary var that contains the line anyway? `alias my $line = <DATA>; while ( defined( alias my $line = <DATA> ) ) {}` [download] These work, but again I don't see the point.. why alias $line to the read line? To prevent copying the line? I think perl already optimizes that away. Maybe I'm just missing something, in which case please enlighten me.	[reply] [d/l] [select]
Re^4: RFC: Is there more to alias? by Solo (Deacon) on Aug 25, 2004 at 20:23 UTC
Thanks, I'll try the new version. And I don't think you're missing anything... hope I didn't make you spin too many cycles on that. As I said it was a curiosity: A way to give $_ a 'pretty name' in a for or while loop. You're saying it's already the same to do: `for $line (<DATA>) {} # or for alias $line (<DATA>) {}` [download] Ok. /shrug. I naively saw the named subroutine arguments as roughly the same thing. I am enlightened. =) --Solo -- You said you wanted to be around when I made a mistake; well, this could be it, sweetheart.	[reply] [d/l]


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