Add tests from testsuite/tests/h98

[ghc-base.git] / GHC / Unicode.hs

diff --git a/GHC/Unicode.hs b/GHC/Unicode.hs
index 20d2b09..b34f677 100644 (file)
--- a/GHC/Unicode.hs
+++ b/GHC/Unicode.hs
@@ -1,6 +1,7 @@
-{-# OPTIONS -fno-implicit-prelude #-}
+{-# LANGUAGE CPP, NoImplicitPrelude, ForeignFunctionInterface #-}
 {-# OPTIONS -#include "WCsubst.h" #-}
 {-# OPTIONS_HADDOCK hide #-}
+
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  GHC.Unicode
@@ -29,10 +30,8 @@ module GHC.Unicode (
   ) where
 
 import GHC.Base
-import GHC.Real  (fromIntegral)
-import GHC.Int
-import GHC.Word
-import GHC.Num   (fromInteger)
+import GHC.Real        (fromIntegral)
+import Foreign.C.Types (CInt)
 
 #include "HsBaseConfig.h"
 
@@ -64,8 +63,8 @@ isControl               :: Char -> Bool
 -- (letters, numbers, marks, punctuation, symbols and spaces).
 isPrint                 :: Char -> Bool
 
--- | Selects white-space characters in the Latin-1 range.
--- (In Unicode terms, this includes spaces and some control characters.)
+-- | Returns 'True' for any Unicode space character, and the control
+-- characters @\\t@, @\\n@, @\\r@, @\\f@, @\\v@.
 isSpace                 :: Char -> Bool
 -- isSpace includes non-breaking space
 -- Done with explicit equalities both for efficiency, and to avoid a tiresome
@@ -135,8 +134,6 @@ toTitle                 :: Char -> Char
 
 -- Regardless of the O/S and Library, use the functions contained in WCsubst.c
 
-type CInt = HTYPE_INT
-
 isAlpha    c = iswalpha (fromIntegral (ord c)) /= 0
 isAlphaNum c = iswalnum (fromIntegral (ord c)) /= 0
 --isSpace    c = iswspace (fromIntegral (ord c)) /= 0
@@ -149,9 +146,6 @@ toLower c = chr (fromIntegral (towlower (fromIntegral (ord c))))
 toUpper c = chr (fromIntegral (towupper (fromIntegral (ord c))))
 toTitle c = chr (fromIntegral (towtitle (fromIntegral (ord c))))
 
-foreign import ccall unsafe "u_iswdigit"
-  iswdigit :: CInt -> CInt
-
 foreign import ccall unsafe "u_iswalpha"
   iswalpha :: CInt -> CInt