Is there a pragma or command line option to ask DMD to show a warning when it implicitly casts from long to ulong ?

Fri Dec 15 21:29:10 UTC 2017

On Friday, December 15, 2017 20:40:10 Ecstatic Coder via Digitalmars-d-learn 
wrote:
> It's taken me some time to find an implicit cast bug ("if
> (my_sometimes_negative_index >= this_array.length)"), while a
> simple C++-like implicit-cast warning would have allowed me to
> find this nasty bug WAY sooner...

No.

https://issues.dlang.org/show_bug.cgi?id=259

- Jonathan M Davis