On Mon, Mar 17, 2014 at 2:45 PM, Simon Peyton Jones <[email protected]>wrote:
> | The one interesting case is T4306 which fails because the generated name > | $wupd is regarded as an infix name, and thus with my new code is > | rendered as > | > | ($wupd) :: GHC.Prim.Double# -> GHC.Prim.Double# > | > | instead of the old > | > | $wupd :: GHC.Prim.Double# -> GHC.Prim.Double# > > I think it'd also be ok just to accept this output too. These "$wxx" names > are generated by GHC and won't show up in user output. It doesn't much > matter displaying them in parens. > Do they show up in -ddump-simpl? It would be nice to keep that output as readable as possible, as there are quite a few of us that read it on a regular basis. > But changing isLexVarSym is probably equally fine too. I think (worth a > check) that it's only called for display purposes, and not in any > performance-critical parts. > > Whichever you choose, add a Note with isLexVarSym to explain the issue and > the choice. Does that mean that any operator that starts with $ will now not be considered infix for printing purposes? -- Johan
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