Does 'D' language supports 'C' like VLA?
CraigDillabaugh via Digitalmars-d
digitalmars-d at puremagic.com
Mon Apr 13 10:02:12 PDT 2015
On Monday, 13 April 2015 at 16:53:55 UTC, BS & LD wrote:
> As you know in 'C' you can create a variable-length-array using
> variably modified type and a run-time variable allocating a
> storage for it - the same way for any local (normally using the
> stack).
>
> However in 'D' I don't see such feature. Code like this fails:
>
> void main()
> {
> size_t szArr = 3;
>
> int[szArr] arr;
> }
>
> With this error message:
>
> error: variable szArr cannot be read at compile time
> int[szArr] arr;
>
> Life example -
> http://melpon.org/wandbox/permlink/a6CzBhYk88FohKlf
>
> Note: I'm also amazed why 'D' compiler can't detect that
> 'szArr' is a constant anyway.
This likely belongs in D.learn. What you are looking for is:
int[] arr;
arr.length = 3;
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