Re: Access to parameterized type
- From: Justin Cormack <justin@xxxxxxxxxxxxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Sun, 2 Sep 2012 18:17:29 +0100
On Sun, Sep 2, 2012 at 5:12 PM, William Adams <william_a_adams@xxxxxxx> wrote:
> local function makevec(ct)
> local tp = ffi.typeof("struct { int n; int Capacity; $ Data[?]; }", ct);
> tp = ffi.metatype(tp, kvec_mt);
> return tp;
> end
I have always used the VLA structure for this type of thing. It maked
sense to me - you have something of variable size.
But why have you got a makevec and a __new? Cant you pass both type
and number to an initializer at the same time? I guess it is less
modular, but not sure it matters...
When I was experimenting with slice
(https://github.com/justincormack/slice) I used a Lua table with
metatable, so I could keep the type hanging around for future use (I
could have used the data[0] thing but it would fail on a zero length
array).
Justin
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