On Sun, Jul 29, 2012 at 7:04 PM, Richard Cobbe <co...@ccs.neu.edu> wrote: > I'm working on an application that involves processing a lot of Unicode > data, and I'm finding the built-in Show implementation for Char to be > really inconvenient. Specifically, it renders all characters at U+0080 and > above with decimal escapes: > > Prelude> '\x80' > '\128' > > This is annoying because all of the Unicode charts give the code points in > hex, and indeed the charts are split into different PDFs at numbers that > are nice and round in hex but not in decimal. So in order to figure out > which character I'm looking at, I have to convert back to hex and then look > it up in the charts. > > Is there any way to ask GHC to render super-ASCII characters with their > hexadecimal escapes, instead? I'm perfectly happy to write my own custom > Show instance, but I don't know how to hook that into ghci's REPL (or, for > that matter, the routines that HUnit uses to generate the messages on > failed tests, etc.). > > I'm using GHC 7.4.1 on MacOS 10.7.4.
In GHC HEAD there is a new flag -interactive-print that allows to change the function used for printing values in GHCi. It will be in 7.6.1. That won't help with HUnit output, though. BR, Paolo _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
