C++ -> D converter mentioned in AMA

[Jacob Carlborg]

On 2013-10-04 08:37, Szymon Gatner wrote:

> Well, that is nothing Clang can't handle. The subset is what I was
> asking for -  there has to be something that tool handles correctly, right?

Of course Clang will be able to lex and parse it. But how should it be 
translated?

void foo (int a
#if BAR
,
int b
#endif
)
{ ... }

You cannot do the exact same thing in D:

void foo (int a
version (BAR)
{
     ,
     int b
}
)
{ ... }

Doing these crazy things are only possible with a preprocessor.

Then you need to duplicate the function, use a string mixin or something 
else that's ugly.

We can take a simpler example:

#if _WIN32
void foo (int);
#elif __APPLE__
void foo (long long);
#elif linux
void foo (long long);
#endif

Translating this manually it would look like this:

version (Windows)
     void foo (int);
else version (OSX)
     void foo (long);
else version (linux)
     void foo (long);

But how could this be translated automatically? In this case you would 
want to have all the above preprocessor macros enabled, at the same 
time. Or somehow run it multiple times with different macros enabled and 
merge them.

I don't know how the preprocessor API looks like in Clang. If you could 
search for hard coded identifiers or something similar.

-- 
/Jacob Carlborg