C++14 implementation status

[Marc Glisse]

On Mon, 10 Jun 2013, Ed Smith-Rowland wrote:

> The real pickle for dynarray is that, AFAICT, if you really want to support 
> arrays on the stack you would need to intercept construction of dynarray in 
> the front end and have the front end pass an appropriately sized VLA pointer 
> to dynarray basically.  (The VLA/alloca'd array must be built in the calling 
> stack frame not the ctor frame).

Note that an alternative implementation might be possible using an 
extension that would allow default argument values to refer to previous 
arguments, like:

   void f(int n, void *p=alloca(n));

where alloca would happen in the caller's frame. Using the always_inline 
attribute could be another one.

It is probably better to introduce the magic anyway, just mentioning it.

-- 
Marc Glisse