On Sat, Aug 14, 2010 at 12:15 PM, Florian Weimer
* Bryan O'Sullivan:
If you know it's text and not binary data you are working with, you should still use Data.Text. There are a few good reasons.
1. The API is more correct. For instance, if you use Text.toUpper on a string containing latin1 "ß" (eszett, sharp S), you'll get the two-character sequence "SS", which is correct. Using Char8.map Char.toUpper here gives the wrong answer.
Data.Text ist still incorrect for some scripts:
$ LANG=tr_TR.UTF-8 ghci GHCi, version 6.12.1: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Prelude> import Data.Text Prelude Data.Text> toUpper $ pack "i" Loading package array-0.3.0.0 ... linking ... done. Loading package containers-0.3.0.0 ... linking ... done. Loading package deepseq-1.1.0.0 ... linking ... done. Loading package bytestring-0.9.1.5 ... linking ... done. Loading package text-0.7.2.1 ... linking ... done. "I" Prelude Data.Text>
Yes. We need locale support for that one. I think Bryan is planning to add it. -- Johan