As long as you check the performance impact on 32-bit, sounds good to me. Edward
Excerpts from Herbert Valerio Riedel's message of 2014-06-21 11:09:44 +0100: > Hello Simon (et al.), > > While doing #9224[1] as a finger-exercise to extend the lexer to support > base-2 integer literals, I got stuck on the lexer extension map being > represented as an 'Int', which (in GHC) is only guaranteed to hold least > 32bits. > > -- for reasons of efficiency, flags indicating language extensions (eg, > -- -fglasgow-exts or -XParallelArrays) are represented by a bitmap > -- stored in an unboxed Int > > However, as all 32bits are already taken up by language extensions, and > I'd need a 33th bit, I'm wondering how to proceed. Can we replace the > 'Int' by an 'Int64' (or even better a Word64, ideally with a newtype or > at least a type-synonym around it?) which would give us a bit more > headroom while being semantically sound even for 'bitSize Int == 32'? > > [1]: https://ghc.haskell.org/trac/ghc/ticket/9224 > > Cheers, > hvr _______________________________________________ ghc-devs mailing list [email protected] http://www.haskell.org/mailman/listinfo/ghc-devs
