On Sun, Feb 17, 2008 at 10:42:34PM +0100, Jonathan Worthington wrote:
> And while I'm rambling about this kinda stuff, I discovered this because I
> was actually looking at cases where we pass blocks off to things like grep.
>
> my @b = @a.grep: { $_ > 42 };
>
> I'm thinking that $_ is really a parameter to this block, so in grep you'd
> do "if $condition($elem) { ... }" to invoke the conditional block. However,
> I guess we'd better make it an optional parameter, otherwise you can't
> write stuff like:
>
> sub pointless($call) {
> $call();
> }
> pointless { say "foo" };
When you can't know, we parse a block to something like:
<-> $_ = OUTER:<$_> {...}
Larry
