core: Move isAlphaNum to Compat module

Author: wismill

unicode-data/Changelog.md

@@ -15,6 +15,11 @@
 - Removed deprecated `Unicode.Char.Numeric.isNumber`.
   Use `Unicode.Char.Numeric.Compat.isNumber` instead.
 
+### Deprecations
+
+- `Unicode.Char.General.isAlphaNum`.
+  Use `Unicode.Char.General.Compat.isAlphaNum` instead.
+
 ## 0.5.0 (July 2024)
 
 - Fix the inlining of `Addr#` literals and reduce their size. This results in

unicode-data/bench/Unicode/Char/General/CompatBench.hs

@@ -20,6 +20,10 @@ benchmarks r = bgroupWithCharRange "Unicode.Char.General.Compat" r $ \chars ->
       [ Bench "base"         Char.isAlpha
       , Bench "unicode-data" GC.isAlpha
       ]
+    , bgroupWithChars "isAlphaNum" chars
+      [ Bench "base"         Char.isAlphaNum
+      , Bench "unicode-data" GC.isAlphaNum
+      ]
     , bgroupWithChars "isLetter" chars
       [ Bench "base"         Char.isLetter
       , Bench "unicode-data" GC.isLetter

unicode-data/bench/Unicode/Char/GeneralBench.hs

@@ -25,10 +25,6 @@ benchmarks r = bgroupWithCharRange "Unicode.Char.General" r $ \chars ->
     , bgroupWithChars "isAlphabetic" chars
       [ Bench "unicode-data" G.isAlphabetic
       ]
-    , bgroupWithChars "isAlphaNum" chars
-      [ Bench "base"         Char.isAlphaNum
-      , Bench "unicode-data" G.isAlphaNum
-      ]
     , bgroupWithChars "isControl" chars
       [ Bench "base"         Char.isControl
       , Bench "unicode-data" G.isControl

unicode-data/lib/Unicode/Char.hs

@@ -47,7 +47,7 @@ where
 import Data.Char (chr, ord)
 import Unicode.Char.Case hiding (Unfold(..), Step(..))
 import Unicode.Char.Case.Compat
-import Unicode.Char.General
+import Unicode.Char.General hiding (isAlphaNum)
 import Unicode.Char.General.Compat
 import Unicode.Char.Identifiers
 import Unicode.Char.Numeric

unicode-data/lib/Unicode/Char/General.hs

@@ -100,11 +100,12 @@ import Control.Exception (assert)
 import Data.Bits ((.&.))
 import Data.Char (isAscii, isLatin1, isAsciiUpper, isAsciiLower, ord)
 import Data.Ix (Ix)
-import Unicode.Internal.Division (quotRem28)
 
+import qualified Unicode.Char.General.Compat as Compat
 import qualified Unicode.Internal.Char.DerivedCoreProperties as P
 import qualified Unicode.Internal.Char.PropList as P
 import qualified Unicode.Internal.Char.UnicodeData.GeneralCategory as UC
+import Unicode.Internal.Division (quotRem28)
 
 --------------------------------------------------------------------------------
 -- General Category
@@ -381,20 +382,19 @@ following 'GeneralCategory's, or 'False' otherwise:
 
 prop> isAlphaNum c == Data.Char.isAlphaNum c
 
+__Note:__ this function is incompatible with 'isAlphabetic':
+
+>>> isAlphabetic '\x345'
+True
+>>> isAlphaNum '\x345'
+False
+
 @since 0.3.0
 -}
+{-# INLINE isAlphaNum #-}
+{-# DEPRECATED isAlphaNum "Use Unicode.Char.General.Compat.isAlphaNum instead." #-}
 isAlphaNum :: Char -> Bool
-isAlphaNum c =
-    let !cp = ord c
-    -- NOTE: The guard constant is updated at each Unicode revision.
-    --       It must be < 0x40000 to be accepted by generalCategoryPlanes0To3.
-    in cp <= UC.MaxIsAlphaNum &&
-        let !gc = UC.generalCategoryPlanes0To3 cp
-        in gc <= UC.OtherLetter ||
-           (UC.DecimalNumber <= gc && gc <= UC.OtherNumber)
-    -- Use the following in case the previous code is not valid anymore:
-    -- gc <= UC.OtherLetter || (UC.DecimalNumber <= gc && gc <= UC.OtherNumber)
-    -- where !gc = UC.generalCategory c
+isAlphaNum = Compat.isAlphaNum
 
 {-| Selects control characters, which are the non-printing characters
 of the Latin-1 subset of Unicode.

unicode-data/lib/Unicode/Char/General/Compat.hs

@@ -13,20 +13,64 @@
 --
 module Unicode.Char.General.Compat
     ( isAlpha
+    , isAlphaNum
     , isLetter
     , isSpace
     ) where
 
 import Data.Char (ord)
 import qualified Unicode.Internal.Char.UnicodeData.GeneralCategory as UC
 
+-- $setup
+-- import qualified Unicode.Char.General
+
 -- | Same as 'isLetter'.
 --
 -- @since 0.3.0
 {-# INLINE isAlpha #-}
 isAlpha :: Char -> Bool
 isAlpha = isLetter
 
+{-| Selects alphabetic or numeric Unicode characters.
+
+This function returns 'True' if its argument has one of the
+following 'GeneralCategory's, or 'False' otherwise:
+
+* 'UppercaseLetter'
+* 'LowercaseLetter'
+* 'TitlecaseLetter'
+* 'ModifierLetter'
+* 'OtherLetter'
+* 'DecimalNumber'
+* 'LetterNumber'
+* 'OtherNumber'
+
+prop> isAlphaNum c == Data.Char.isAlphaNum c
+
+__Note:__ this function is incompatible with 'Unicode.Char.General.isAlphabetic':
+
+>>> Unicode.Char.General.isAlphabetic '\x345'
+True
+>>> isAlphaNum '\x345'
+False
+
+@since 0.6.0 moved to Compat module
+
+@since 0.3.0
+-}
+isAlphaNum :: Char -> Bool
+isAlphaNum c =
+    let !cp = ord c
+    -- NOTE: The guard constant is updated at each Unicode revision.
+    --       It must be < 0x40000 to be accepted by generalCategoryPlanes0To3.
+    in cp <= UC.MaxIsAlphaNum &&
+        let !gc = UC.generalCategoryPlanes0To3 cp
+        in gc <= UC.OtherLetter ||
+           (UC.DecimalNumber <= gc && gc <= UC.OtherNumber)
+    -- Use the following in case the previous code is not valid anymore:
+    -- gc <= UC.OtherLetter || (UC.DecimalNumber <= gc && gc <= UC.OtherNumber)
+    -- where !gc = UC.generalCategory c
+
 {-| Selects alphabetic Unicode characters (lower-case, upper-case and title-case
 letters, plus letters of caseless scripts and modifiers letters).