I want this so badly, please implement

[Adam D. Ruppe via Digitalmars-d]

Just make RangeError tell report the index and length, where 
easy. For ordinary arrays, both are size_t so it can be trivially 
passed by value without thinking about ownership or anything.

And it would save me hours.

https://issues.dlang.org/show_bug.cgi?id=15889


I would like to know the index on associative arrays too, but I 
understand that can be more difficult.

But if you guys implement it for regular array for the next 
release, I would be exceedingly joyous.