Validation: simplification from new Parser functions (errorParser and <:>).

src/App/Validation/DNS.purs

@@ -1,6 +1,6 @@
 module App.Validation.DNS where
 
-import Prelude (apply, between, bind, map, pure, ($), (-), (<), (<<<))
+import Prelude (apply, between, bind, map, pure, ($), (-), (<))
 
 import Control.Alt ((<|>))
 import Data.Array as A
@@ -13,11 +13,11 @@ import App.ResourceRecord (ResourceRecord)
 import GenericParser.SomeParsers as SomeParsers
 import GenericParser.Parser as G
 import GenericParser.DomainParser.Common (DomainError) as DomainParser
-import GenericParser.DomainParser (label, sub_eof) as DomainParser
+import GenericParser.DomainParser (sub_eof) as DomainParser
 import GenericParser.IPAddress as IPAddress
 import GenericParser.RFC5234 as RFC5234
 
--- | **History**
+-- | **History:**
 -- | The module once used dedicated types for each type of RR.
 -- | That comes with several advantages.
 -- | First, type verification was a thing, and function were dedicated to a certain type of record.
@@ -152,7 +152,7 @@ txt_parser = do pos <- G.current_position
                 e <- G.tryMaybe SomeParsers.eof
                 pos2 <- G.current_position
                 case e of
-                  Nothing -> G.Parser \i -> G.failureError i.position (Just TXTInvalidCharacter)
+                  Nothing -> G.errorParser $ Just TXTInvalidCharacter
                   Just _ -> do
                     let nbchar = pos2 - pos
                     if nbchar < max_txt

src/App/Validation/Email.purs

@@ -2,7 +2,6 @@ module App.Validation.Email where
 
 import Prelude
 
-import Control.Alt ((<|>))
 import Data.Either (Either(..))
 import Data.Maybe (Maybe(..))
 import Data.Validation.Semigroup (V, invalid, toEither)
@@ -31,12 +30,12 @@ parse (G.Parser p) str c = case p { string: str, position: 0 } of
 
 parse_full_email :: G.Parser EmailParsingError String
 parse_full_email = do
-  email_address <- RFC5322.address <|> G.Parser \i -> G.failureError i.position (Just CannotParse)
-  _ <- SomeParsers.eof <|> G.Parser \i -> G.failureError i.position (Just CannotEntirelyParse)
+  email_address <- RFC5322.address  G.<:> \_ -> CannotParse
+  _ <- SomeParsers.eof              G.<:> \_ -> CannotEntirelyParse
   pos <- G.current_position
-  if pos < min_email_size || pos > max_email_size
-  then G.Parser \i -> G.failureError i.position (Just $ Size min_email_size max_email_size pos)
-  else pure email_address
+  if between min_email_size max_email_size pos
+  then pure email_address
+  else G.errorParser $ Just $ Size min_email_size max_email_size pos
 
 parserEmail :: String -> V (Array Error) String
 parserEmail str = parse parse_full_email str ParsingError