primitive vector types (permutation syntax)

[Christopher Wright]

Denis Koroskin wrote:
> On Sun, 22 Feb 2009 14:02:53 +0300, Mattias Holm 
> <hannibal.holm at gmail.com> wrote:
> 
>> I think that the following would work reasonably well:
>>
>>     allow the [] operator for arrays to take comma separated lists of 
>> indices.
>>
>> So the OpenCL like statement:
>>
>>     v.xyzw = v2.wzyx;
>>
>> will be written as:
>>
>>     v[0,1,2,3] = v2[3,2,1,0];
> 
> How would you implement it for user-defined types?

T[] opIndex(int[] indices) { ... }
void opIndexAssign(int[] indices, T[] values) { ... }