On Mon, Feb 17, 2014 at 11:07:07AM +0100, Erik Hesselink wrote:
Hi Richard,
Where is your Parser module located?
The Happy source for the Parser module is in the src directory with the rest of the files for the executable.
Remember that your code will be compiled twice this way. What is, in my opinion, a better setup, is put the shared code in a library (like you had), and then have a shallow executable in the same package that depends on the library. The test-suite can then also depend on the library. All three should have distinct source dirs.
Having most functionality in a library is a good design principle anyway: it makes it easier to re-use it in a different way later, and makes sure you think about API boundaries and such.
In principle, I agree. However, it's not obvious that there's actually any code that's suitable for re-use in this case (except for stuff I've already moved out to other libraries, in separate Cabal packages). And I'm not sure that I get many of the benefits of thinking about API boundaries, because I have to expose modules from the library if I want to write unit tests for them, even if they're not really part of the library's public interface. However, that seems to be the best way to go, so I'll leave it at that. Thanks! Richard