some reformatting

make-pages/Info.hs

@@ -182,30 +182,31 @@ instance FromYAML NsfwFilter where
   parseYAML = YAML.withStr "nsfw filter" readNsfwFilter
 
 
-data ArtistFilter = Me | NotMe | AllW deriving (Eq, Show)
+data ArtistFilter = Me | NotMe | AllA deriving (Eq, Show)
 
 readArtistFilter :: (IsString str, Eq str, Alternative f)
                  => str -> f ArtistFilter
 readArtistFilter "me"     = pure Me
 readArtistFilter "not-me" = pure NotMe
-readArtistFilter "all"    = pure AllW
+readArtistFilter "all"    = pure AllA
 readArtistFilter _        = empty
 
 matchArtist :: ArtistFilter -> Info -> Bool
 matchArtist Me    = #mine
 matchArtist NotMe = #notMine
-matchArtist AllW  = const True
+matchArtist AllA  = const True
 
 noFilters :: GalleryFilters
 noFilters =
-  GalleryFilters {nsfw = AllN, artist = AllW, require = [], exclude = []}
+  GalleryFilters {nsfw = AllN, artist = AllA, require = [], exclude = []}
 
 matchFilters :: GalleryFilters -> Info -> Bool
 matchFilters (GalleryFilters {nsfw, artist, require, exclude}) i =
   matchNsfw nsfw i && matchArtist artist i &&
-  all (\t -> HashSet.member t tags) require &&
-  all (\t -> not $ HashSet.member t tags) exclude
-  where tags = HashSet.fromList $ #tags i
+  all (∊ tags) require && all (∉ tags) exclude
+ where
+  tags = HashSet.fromList $ #tags i
+  (∊) = HashSet.member; x ∉ xs = not $ x ∊ xs
 
 
 instance FromYAML GalleryInfo where
@@ -218,7 +219,7 @@ instance FromYAML GalleryInfo where
 instance FromYAML GalleryFilters where
   parseYAML = YAML.withMap "gallery filters" \m ->
     GalleryFilters <$> m .:? "nsfw"    .!= AllN
-                   <*> m .:? "artist"  .!= AllW
+                   <*> m .:? "artist"  .!= AllA
                    <*> m .:? "require" .!= []
                    <*> m .:? "exclude" .!= []
 
@@ -246,11 +247,10 @@ instance FromYAML IndexInfo where
 data Pair a b = Pair !a !b
 
 instance (FromYAML a, FromYAML b) => FromYAML (Pair a b) where
-  parseYAML =
-    YAML.withMap "single-pair map" \m ->
-      case Map.toList m of
-        [(a, b)] -> Pair <$> parseYAML a <*> parseYAML b
-        _        -> fail "expected exactly one pair"
+  parseYAML = YAML.withMap "single-pair map" \m ->
+    case Map.toList m of
+      [(a, b)] -> Pair <$> parseYAML a <*> parseYAML b
+      _        -> fail "expected exactly one pair"
 
 
 instance FromYAML Day where