-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Malcolm Wallace wrote: > Isaac Dupree <[EMAIL PROTECTED]> wrote: > >> know how close GHC's stage1 code >> is to compilability with other compilers? > > AFAIK, ghc's source code primarily uses only two main extensions beyond > the Haskell language - unboxed values, and pattern guards. To a large > extent, GHCi will also rely on having its own runtime system available, > but then that is not a stage-1 issue.
Oh my, pattern guards were implemented in GHC that long ago? seems so. And seems that hugs, yhc and nhc98 don't implement them presently (not sure about jhc as I don't have a working copy presently, http://hackage.haskell.org/trac/haskell-prime/wiki/HaskellExtensions says no, but it's in development enough that they could probably be implemented in it reasonably...) - From my inspection so far, the only uses of unboxed values are in stage2, and in those few Fast* library modules which can/already have "ifdef ghc" sections. I'll make them have as close as possible to matching strictness characteristics (e.g. fastOr, FastMutInt's contents) ; although I can't make them automatically, when passed as arguments, be strict as is the nature of the unboxed. Aside from cpp, GHC also requires unsafePerformIO - both for efficient FastString comparison/storage, and for various GLOBAL_VARs. Isaac -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGXABHHgcxvIWYTTURAv+tAJ4/qna1j495BZtOCppODl2p4He2jACfWpJV Wav0ZaLu5S3K+AbsnbdQg3o= =hVZI -----END PGP SIGNATURE----- _______________________________________________ Cvs-ghc mailing list [email protected] http://www.haskell.org/mailman/listinfo/cvs-ghc
