17 Oct
2007
17 Oct
'07
2:35 p.m.
Serge D. Mechveliani wrote:
People,
here is a more precise report about empty _export_ in ghc-6.8.1-candidate:
I use -------------------------------- module M1 (f, module M2) where import M2 () f = ... --------------------------------
in the situation when M1 imports some instances from M2 and reexports these instances.
And ghc-6.8.1-candidate reports
"Warning: The export item `module M2' exports nothing"
1) Can I fix anything here? 2) Should this warning be different?
The warning is true. The instances will be exported even if `module M2' is omitted from the export list, so that export item exports nothing. Isaac