-dppr-cols=N changes the width of the output page; you could try a large number there. There isn't a setting meaning "infinity", sadly.
Simon From: Andrew Gibiansky [mailto:andrew.gibian...@gmail.com] Sent: 07 January 2014 03:04 To: Simon Peyton Jones Cc: Erik de Castro Lopo; ghc-devs@haskell.org Subject: Re: Changing GHC Error Message Wrapping Thanks Simon. In general I think multiline tuples should have many elements per line, but honestly the tuple case was a very specific example. If possible, I'd like to change the *overall* wrapping for *all* error messages - how does `sep` know when to break lines? there's clearly a numeric value for the number of columns somewhere, but where is it, and is it user-adjustable? For now I am just hacking around this by special-casing some error messages and "un-doing" the line wrapping by parsing the messages and joining lines back together. Thanks, Andrew On Mon, Jan 6, 2014 at 7:44 AM, Simon Peyton-Jones <simo...@microsoft.com<mailto:simo...@microsoft.com>> wrote: I think it's line 705 in types/TypeRep.lhs pprTcApp p pp tc tys | isTupleTyCon tc && tyConArity tc == length tys = pprPromotionQuote tc <> tupleParens (tupleTyConSort tc) (sep (punctuate comma (map (pp TopPrec) tys))) If you change 'sep' to 'fsep', you'll get behaviour more akin to paragraph-filling (hence the "f"). Give it a try. You'll get validation failure from the testsuite, but you can see whether you think the result is better or worse. In general, should multi-line tuples be printed with many elements per line, or just one? Simon From: ghc-devs [mailto:ghc-devs-boun...@haskell.org<mailto:ghc-devs-boun...@haskell.org>] On Behalf Of Andrew Gibiansky Sent: 04 January 2014 17:30 To: Erik de Castro Lopo Cc: ghc-devs@haskell.org<mailto:ghc-devs@haskell.org> Subject: Re: Changing GHC Error Message Wrapping Apologize for the broken image formatting. With the code I posted above, I get the following output: Couldn't match expected type `(GHC.Types.Int<http://GHC.Types.Int>, GHC.Types.Int<http://GHC.Types.Int>, GHC.Types.Int<http://GHC.Types.Int>, t0, t10, t20, t30, t40, t50, t60, t70, t80, t90)' with actual type `(t1, t2, t3)' I would like the types to be on the same line, or at least wrapped to a larger number of columns. Does anyone know how to do this, or where in the GHC source this wrapping is done? Thanks! Andrew On Sat, Jan 4, 2014 at 2:55 AM, Erik de Castro Lopo <mle...@mega-nerd.com<mailto:mle...@mega-nerd.com>> wrote: Carter Schonwald wrote: > hey andrew, your image link isn't working (i'm using gmail) I think the list software filters out image attachments. Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org<mailto:ghc-devs@haskell.org> http://www.haskell.org/mailman/listinfo/ghc-devs
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