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Add a Monoid instance for Parser #58

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Merged
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Sep 13, 2020
Merged

Add a Monoid instance for Parser #58

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3 changes: 3 additions & 0 deletions src/Text/Parsing/StringParser.purs
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Expand Up @@ -103,3 +103,6 @@ try (Parser p) = Parser \(s@{ pos }) -> lmap (_ { pos = pos}) (p s)

instance semigroupParser :: Semigroup a => Semigroup (Parser a) where
append = lift2 append

instance monoidParser :: Monoid a => Monoid (Parser a) where
mempty = pure mempty