Re: state of the cabal (preprocessors)

On Tue, Oct 26, 2004 at 05:33:41PM -0400, Isaac Jones wrote:

"Simon Marlow" writes:

...

3. We add CPP to the list of extensions in Cabal, so you can say {-# LANGUAGE CPP #-} to get C preprocessing in the current file, or add CPP to the list of extensions in the package description to get CPP on every file. That doesn't preclude also using a .cpp extension, but it means you don't have to.

For hugs this would mean preprocessing all files and putting the new .hs files into a temp directory and compiling these.

When you get to .hs, you're done (except for compiling ffi stubs) -- these are libraries ready for Hugs.

Hopefully, there will be directives in the preprocessed sources to refer back to the original source, and hugs should report errors against the original source lines rather than the preprocessed source lines. Is hugs able to do this already?

No, it doesn't understand LINE pragmas (nor #line).