Why not have a -staticcov (or -ctcov) flag to dmd that produces compile time code coverage?
This will work for most code (with the exception of virtual methods called from a base class -- anything else?): it'll just produce 1 or 0 depending for each line compiled in, depending on whether it's reachable from main file.

Likewise, with the recent addition of minimal code coverage for unittest we could have:

dmd -cov=83 -unittest -main -run std/file.d
dmd -staticcov=83 -unittest -main -run std/file.d

Further enhancements: compile time caller/callee graph.

Thanks for your feedback!

timotheecour:

> Why not have a -staticcov (or -ctcov) flag to dmd that produces compile time code coverage?

This seems a note fit to be added to this:

http://d.puremagic.com/issues/show_bug.cgi?id=9721

Bye,
bearophile