Re: sunday afternoon whishlist

[HyperHacker <hyperhacker@...>]

On Tue, Jun 8, 2010 at 19:57, David Manura <dm.lua@math2.org> wrote:
> On Mon, May 10, 2010 at 2:26 AM, Juris Kalnins <juris@mt.lv> wrote:
>>> Could x[] be syntactic sugar for x[#x+1] ?  ...
>> Actually, it would be more powerful to have [] operator take arbitrary
>> number of values, just like () does.
>
> With these extensions, "t[f()] = 1" might have different meanings
> depending on whether f() returns 0, 1, or > 1 values.
>
> The existing ways to express matrix get/set syntax in Lua [1-2] are
> either less efficient or less clean than m[a,b]=c .  Even with good
> syntax, questions of efficiency remain though [3].
>
> [1] http://lua-users.org/lists/lua-l/2009-11/msg00285.html
>     "help to (slightly) modify Lua interpreter"
> [2] http://lua-users.org/lists/lua-l/2008-07/msg00604.html
>     "How do I get two dimensional array access notation for my
> (matrix) userdata?"
> [3] http://lua-users.org/lists/lua-l/2009-08/msg00048.html
>     "matrix operations and temporary objects?"
>

There is a patch on the wiki that allows t[1,2,3] as syntactical sugar
for t[1][2][3]. I don't think it does anything special with t[]
though.

-- 
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