Void initialization

[Timon Gehr]

On 12/20/2011 07:12 PM, bearophile wrote:
> Stewart Gordon:
>
>> On 19/12/2011 12:12, bearophile wrote:
>
>>> Try something like this (untested):
>>>
>>> alias float TF;
>>> TF[] f = (cast(TF*)std.gc.malloc(x * TF.sizeof))[0 .. x];
>> <snip>
>>
>> I fail to see any real difference from the OP's code:
>>
>> - Why the alias?
>
> Because in that code I have used three times a type (TF), auto allows to remove only one of them. The alias is not the best solution (a better solution is to put that code into a templated function), but repeating the same generic type more than one time is usually a source of bugs.
>
>
>> - std.gc.malloc returns the array with correct length according to my quick test, so the
>> use of [0..x] is redundant
>
> Really? Well, as I have said I have not tested that code.
> Generally GC functions return a void*, so to create an array I think you need to slice it... What is the code of your quick test?
>
>
>> - using TF.sizeof instead of 4 might fix things if on the user's platform float isn't 4
>> bytes long.
>
> In D I think float is always 4 bytes long.
>
>
>>   Otherwise, while using .sizeof instead of a hard-coded number is better
>> practice, it isn't going to get rid of an AV.
>
> I don't know what an AV is.
>
> Bye,
> bearophile

Access Violation.