Why is D unpopular?

[Ola Fosheim Grøstad]

On Sunday, 15 May 2022 at 12:41:20 UTC, zjh wrote:
> On Sunday, 15 May 2022 at 12:33:23 UTC, zjh wrote:
>
>>95%.
>
> It can be completely implemented that ,original 20 
> modifications needed, but now only `1/2` modification is needed.
> This can be achieved through various `matching macros` auto 
> convert.Like Atila's `dpp` convert.

I think macro expansion should be done in the lexer, differences 
between C and D should be resolved in the parser and in the 
static analysis after parsing. All content of the macro can be 
assumed to be proper C, but things that are passed in as 
parameters can refer to D-code and that is where you need to be 
careful and perhaps introduce new language constructs if it turns 
out that the analysis is too difficult or even change the 
semantics of the D language (difficult to say in advance).

I don't think one should encourage to use this feature until it 
is done, as then you have no way to change the approach and you 
risk being stuck with something that is inadequate.

I think this is a clear cut case of: be prepared to do it 
properly or don't do it at all.