Integer promotion issue

[Walter Bright]

On 9/8/2021 5:19 AM, HuskyNator wrote:
> On Sunday, 26 January 2020 at 23:16:40 UTC, Walter Bright wrote:
>> On 1/26/2020 5:01 AM, Guillaume Piolat wrote:
>>> Pretty sure a LOT of code would break if C++ or D would abandon this rule
>>
>> Worst of all, the breakage would be silent.
> 
> Could this be added as a compiler flag?
> This would probably fix a lot of annoyances, without causing issues in older 
> codebases.

Every such flag doubles the amount of testing required. And global behavior 
flags like this will have essentially unpredictable results on the code.