why $ is need to access array [negative index]?
schveiguy at gmail.com
Fri Sep 18 21:04:25 UTC 2020
On 9/18/20 4:46 PM, mw wrote:
> On Friday, 18 September 2020 at 20:06:01 UTC, Steven Schveighoffer wrote:
>> I would say no. The indexing code lowers to a machine instruction.
>> Making it so a negative value means something else means every single
>> indexing operation is going to have to check whether it's negative,
>> and if so do something completely different.
> Currently we have range check on every single indexing operation
> already; so the trade-off here is: adding one more check v.s. the
> convenience it buys.
This currently disables the bounds checks. If your proposed feature went
in, then it would still have to check the index for sign.
More information about the Digitalmars-d