-v for error only

[DigitalDesigns]

On Tuesday, 19 June 2018 at 12:44:26 UTC, Nicholas Wilson wrote:
> On Tuesday, 19 June 2018 at 08:40:03 UTC, DigitalDesigns wrote:
>> There needs to be a switch, if their isn't one already, where 
>> only errors are verbose.
>>
>> When I use the -v switch it not only expands the error trace 
>> like it should but also adds all kinds of additional 
>> meaningless info(semantic3, module list, etc). All this 
>> additional information is generally useless and obscures the 
>> main point of using -v which is to get a deeper error trace.
>>
>> When doing a lot of compile time work and using pragma msg, it 
>> can make things worse.
>>
>> It would be nice if there was something in between the two 
>> extremes: Only shows longer error traces and only most 
>> important compiler verbosity. Better yet, implement a 
>> verbosity level -v1, ..., -v9 give 9 zones and one can enable 
>> any number of zones -v158 enables the errors for zones 1 5 and 
>> 8. Could use hex for more zones: -v14aef.
>>
>> Anyways, I guess it's more of a dream feature...
>
> The info is not useless, it very useful when debugging the 
> compiler :)
>
> What additional info do you get with -v that helps?
> (I ask having only really used LDC's -vv for debugging it 
> (which produces waaaay more output than DMD))

It may or may not be helpful. Just because it can show a lot of 
shit doesn't mean it should because it is not always helpful 
under all circumstances.