extending foreach for keyed ranges and other usage of datastructures

[monkyyy]

On Thursday, 16 May 2024 at 18:15:09 UTC, Quirin Schroll wrote:
> On Wednesday, 15 May 2024 at 20:27:12 UTC, monkyyy wrote:
>> extend the api of foreach to allow for 
>> `foreach(key,value;data)` for user data types,
>>  and user defined "autodecoding"
>>
>> […]
>
> Can’t `opApply` not already do that?

opApply cant effect T[] to have int indexes and range.enumerate 
has problems with strings; and if you have key,value pairs you 
must always use it in all foreaches even if you only use value 
while slices get special treatment