foreach counter now must be size_t ?

[Nicholas Wilson]

On Monday, 4 February 2019 at 22:26:08 UTC, Johan Engelen wrote:
> This code now gives a deprecation message (>= 2.084):
> ```
> void foo(int[] arr) {
>     foreach (uint i, ref elem; arr) { }
> }
> ```
> Deprecation: foreach: loop index implicitly converted from 
> `size_t` to `uint`
>
> This is in contrast to the spec that says that "The index must 
> be of int, uint, long or ulong type, it cannot be ref, and it 
> is set to be the index of the array element."
> https://dlang.org/spec/statement.html#foreach_over_arrays
>
> Did someone forget to update the spec? Or is it a frontend bug?
>
> -Johan

Thats a spec problem. The behaviour is very much deliberate.