I can get the GDC to give me the source code with all the templates extended but no other work has been done?

Suppose I have a file foo.d

that creates a bunch of templates. Is there a way that I can ask GDC (in particular) to give me foo.d

all the templates it has created, but nothing is done? The GCC option -E

obviously doesn't work as D templates are not extended by the C preprocessor, but I'm not sure which option I should try (or if it even exists).