feat: clearer whitespace parsing

src/Language/Json.hs

@@ -70,6 +70,7 @@ instance Arbitrary PrintableValue where
 null :: Parser Value
 null = do
   Parser.exact "null"
+  whitespace
   pure Null
 
 true :: Parser Bool
@@ -83,7 +84,7 @@ false = do
   pure False
 
 boolean :: Parser Bool
-boolean = true <|> false
+boolean = (true <|> false) <* whitespace
 
 digit :: Parser Int
 digit = Char.digitToInt <$> Parser.oneOf (Parser.char <$> ['0'..'9'])
@@ -138,6 +139,7 @@ number = do
          decimalPartLength = length . show $ part
          in fromIntegral (integerPart * 10 ^ decimalPartLength + part) % 10 ^ decimalPartLength
 
+  whitespace
   pure $ concatRational * fromIntegral @Integer (applySign factor (10 ^ Maybe.fromMaybe 0 power))
 
 -- >>> import Language.Json.Parser
@@ -153,6 +155,7 @@ string = do
   _ <- Parser.exact "\""
   str <- many stringChar
   _ <- Parser.exact "\""
+  whitespace
 
   pure $ Text.pack str
 
@@ -209,15 +212,21 @@ value = Parser.oneOf
 document :: Parser Value
 document = whitespace *> value <* whitespace <* Parser.eof
 
-keyvalue :: Parser (Text, Value)
-keyvalue = do
+comma :: Parser Char
+comma = Parser.char ',' <* whitespace
+
+keyValue :: Parser (Text, Value)
+keyValue = do
+  -- name
   name <- string
 
-  whitespace
-  _ <- Parser.char ':'
-  whitespace
+  -- separator
+  Parser.char ':' *> whitespace
 
+  -- value
   val <- value
+
+  -- result
   pure (name, val)
 
 object :: Parser (Map Text Value)
@@ -225,7 +234,7 @@ object = do
   _ <- Parser.char '{'
   whitespace
 
-  members <- (keyvalue <* whitespace) `Parser.sepBy` (Parser.char ',' <* whitespace)
+  members <- (keyValue <* whitespace) `Parser.sepBy` comma
 
   _ <- Parser.char '}'
   pure $ Map.fromList members
@@ -238,7 +247,7 @@ array = do
   _ <- Parser.char '['
 
   whitespace
-  elements <- (value <* whitespace) `Parser.sepBy` (Parser.char ',' <* whitespace)
+  elements <- value `Parser.sepBy` comma
 
   _ <- Parser.char ']'
   pure $ Array.listArray (0, fromIntegral $ length elements - 1) elements