parent 1b275ff

author Emily Pillmore <[email protected]> 1578367360 -0500
committer Emily Pillmore <[email protected]> 1612033171 -0500

Add elem combinator to api

Author: emilypi

src/Data/Text.hs

@@ -185,6 +185,7 @@ module Data.Text
     , filter
     , breakOnAll
     , find
+    , elem
     , partition
 
     -- , findSubstring
@@ -1503,6 +1504,13 @@ chunksOf k = go
 -------------------------------------------------------------------------------
 -- ** Searching with a predicate
 
+-- | /O(n)/ The 'elem' function takes a character and a 'Text', and
+-- returns 'True' if the element is found in the given 'Text', or
+-- 'False' otherwise.
+elem :: Char -> Text -> Bool
+elem c t = S.any (== c) (stream t)
+{-# INLINE elem #-}
+
 -- | /O(n)/ The 'find' function takes a predicate and a 'Text', and
 -- returns the first element matching the predicate, or 'Nothing' if
 -- there is no such element. Subject to fusion.

src/Data/Text/Lazy.hs

@@ -191,6 +191,7 @@ module Data.Text.Lazy
     -- * Searching
     , filter
     , find
+    , elem
     , breakOnAll
     , partition
 
@@ -1697,6 +1698,13 @@ find :: (Char -> Bool) -> Text -> Maybe Char
 find p t = S.findBy p (stream t)
 {-# INLINE find #-}
 
+-- | /O(n)/ The 'elem' function takes a character and a 'Text', and
+-- returns 'True' if the element is found in the given 'Text', or
+-- 'False' otherwise.
+elem :: Char -> Text -> Bool
+elem c t = S.any (== c) (stream t)
+{-# INLINE elem #-}
+
 -- | /O(n)/ The 'partition' function takes a predicate and a 'Text',
 -- and returns the pair of 'Text's with elements which do and do not
 -- satisfy the predicate, respectively; i.e.