D compiler equivilent of "gcc -E" for debug/view template instantiation(generated) code?

[dangbinghoo]

On Friday, 30 July 2021 at 10:20:36 UTC, Stefan Koch wrote:
> On Friday, 30 July 2021 at 09:30:13 UTC, Mike Parker wrote:
>> On Friday, 30 July 2021 at 08:38:24 UTC, dangbinghoo wrote:
>>>
>>>
>>> but, where's these switch option documented? it seems it not 
>>> appears in dmd --help or man dmd, or online document 
>>> https://dlang.org/dmd-linux.html
>>>
>>>
>>
>> That's what he meant by "hidden" switch. I don't know why it 
>> isn't documented, but it probably should be.
>
> The reason why it's not documented is because we don't want 
> people to rely on the format of the output.
> I guess if we put that disclaimer in the docs we could ...

ok, that is reasonable. thanks!