Re: tables with multiple indeces?
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- Subject: Re: tables with multiple indeces?
- From: Chris Marrin <chris@...>
- Date: 2006年3月20日 11:00:46 -0800
Gavin Kistner wrote:
On Mar 20, 2006, at 8:41 AM, Chris Marrin wrote:
This WILL happen if you do this:
t[{1,2,3}]
As a silly idea, to simplify the syntax, how about:
t{ 1, 2, 3 }
Where 't' is actually a closure function wrapping up a table of your
choosing?
Or t can still be a table, whose metatable has a __call method. This
will call the method with a single table param. The question is what do
you want to do with this. If you say:
local a = t{1,2,3}
Then presumably you are dereferencing the table in some interesting way,
and the __call function can do that for reasonable results. But this:
t{1,2,3} = 12
is not legal Lua syntax. Unfortunately, a Lua function cannot return an
'lvalue' (in C nomemclature). Seems like it would be useful to allow a
function call to be on the left side of an assignment statement. By
default this:
f(a,b) = 12+14
could translate to:
f( {a,b}, {12+14} )
Using tables would make it easy to separate the input params from the
right-side expression.
Just a thought...
--
chris marrin ,"",ドル
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"As a general rule,don't solve puzzles that open portals to Hell"'