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Adds between' combinator which acts like between but doesn't consume … #3

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Adds between' combinator which acts like between but doesn't consume … #3

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8 changes: 7 additions & 1 deletion Data/GraphQL/Parser.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -315,14 +315,20 @@ braces :: Parser a -> Parser a
braces = between "{" "}"

quotes :: Parser a -> Parser a
quotes = between "\"" "\""
quotes = between' "\"" "\""

brackets :: Parser a -> Parser a
brackets = between "[" "]"

between :: Parser Text -> Parser Text -> Parser a -> Parser a
between open close p = tok open *> p <* tok close

-- | Applies a parser between two given parsers, but does not swallow
-- whitespace after the opening token. Useful for whitespace-significant
-- sections, such as string literals.
between' :: Parser Text -> Parser Text -> Parser a -> Parser a
between' open close p = open *> p <* tok close

-- `empty` /= `pure mempty` for `Parser`.
optempty :: Monoid a => Parser a -> Parser a
optempty = option mempty
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