Re: Does 'D' language supports 'C' like VLA?

[John Colvin via Digitalmars-d]

On Monday, 13 April 2015 at 17:02:13 UTC, CraigDillabaugh wrote:

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;

Eww.

auto arr = new int[3];

Also, I think he's referring to something slightly different.