A matter of inout

[Dmitry Olshansky]

On 27-Jul-12 19:53, bearophile wrote:
> This program used to compile in DMD 2.059:
>
>
> import std.stdio;
> inout(T[]) forwardDifference(T)(inout(T[]) s, in int n) pure {
>      foreach (_; 0 .. n)
>          s[] -= s[1 .. $];
>      return s[0 .. $-n];
> }
> void main() {
>      immutable A = [90.5, 47, 58, 29, 22, 32, 55, 5, 55, 73.5];
>      foreach (level; 0 .. A.length)
>          writeln(forwardDifference(A.dup, level));
> }
>
>
> Now it gives:
>
> test.d(5): Error: slice s[] is not mutable
> test.d(12): Error: template instance test.forwardDifference!(double)
> error instantiating
>
> Is it a 2.060 regression (or it's caused by a bug fix)?
>

If it compiled before then I'd think it's a regression.



-- 
Dmitry Olshansky