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Surprising collation sort when using UpperFirst #16

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robinp opened this issue Jul 29, 2015 · 0 comments

robinp commented Jul 29, 2015

I would expect that specifying UpperFirst would sort the capital before the lower, regardless of the following character. Do you have any insight?

:set -XOverloadedStrings
import qualified Data.Text.ICU as ICU
import qualified Data.Text.ICU.Collate as I
ICU.collate (ICU.collatorWith (ICU.Locale "de_DE") [I.CaseFirst (Just I.UpperFirst)]) "muller" "Müller"
-- LT
ICU.collate (ICU.collatorWith (ICU.Locale "de_DE") [I.CaseFirst (Just I.UpperFirst)]) "muller" "Muller"
-- GT

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