On Sat, Feb 05, 2005 at 04:30:58PM +0800, Autrijus Tang wrote:
: So it turns out that A03 says that semicolons within "brackets" defaults
: to a list-of-list builder. Curiously, it is missing from S03, and the
: behaviour is not documented in detail.
That's because it's still a bit hand-wavey.
: Currently I assume the "brackets" above listish generators -- (), [], {}
: -- but not blocks under list context. That is:
:
: sub foo { 1 ; 2 ; 3 } # returns 3
: sub bar { ( 1 ; 2 ; 3 ) } # returns ([1],[2],[3])
:
: Is this the correct understanding?
Yes, unless it returns [[1],[2],[3]] instead. (What you have written is
context dependent.)
: If so, S03 needs to be patched to say that (and more).
S09 talks about it some. Basically semicolon is useful where you want
to talk about a list of lists, such as in a multidimensional slice.
Larry
