ImportC can now automatically run the preprocessor

[max haughton]

On Monday, 16 May 2022 at 05:11:42 UTC, Walter Bright wrote:
> On 5/15/2022 8:59 PM, max haughton wrote:
>> One thing I'd also like to note is that once the C has been 
>> turned into the D AST you actually can almost get it to emit D 
>> code that represents the C
>
> "almost" is the operative word, here :-/
>
> One of the motivations for ImportC (as opposed to C=>D 
> translations that htod, dstep, and dpp do) is that the 
> semantics can be an exact match to C.

The semantics will be an exact match because I'm talking about 
merely making the dmd AST dumping feature better versus a new 
tool. It basically already works it's just that you have to make 
it not emit `import object` and also fix a bug in the dmd parser 
because extern(C) doesn't work inside a function parameter or 
something to that effect.