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:[email protected]] On Behalf Of Andrew
Gibiansky
Sent: 04 January 2014 17:30
To: Erik de Castro Lopo
Cc: [email protected]
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
<[email protected]<mailto:[email protected]>> 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/
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