Will it be possible to write a GCC frontend in D?

[rempas]

I'm using a book called "modern compiler design (version 2)" to 
learn how to create compiler and I thought about learning and 
applying this knowledge on writing a GCC frontend just for fun to 
see where this gets me. However, I've seen some tutorials and 
I've seen people doing it in C++. Now, I want to do it in D (of 
course!). My problem is that I don't if the headers are using C++ 
features because If this is possible then I won't be able to use 
ImportC to "automatically" get bindings to use in D. Any ideas?