No runtime attribute?

[Stefan Koch via Digitalmars-d]

On Wednesday, 10 December 2014 at 10:46:58 UTC, bearophile wrote:
> The #[no_std] attribute is used to avoid the runtime in Rust.
>
> Do we have any use for a @noruntime attribute in D?
>
> All @noruntime functions are also @nogc (so you don't need to 
> put both attributes).
>
>
> This could give a compilation error:
>
> void foo(int[] a) @noruntime {
>     int[5] b = a[];
> }
>
> Bye,
> bearophile

In a similar vain.
It would be very nice if we could subsitute individual functions 
of the runtime library by  other functions or function pointers.