File: ExtraPrettyParentheses.hs

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haskell-src-exts 1.23.1-5
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data Q a = Q a a

-- In this example, the pretty-printer should insert extra parentheses around
-- the negative literal pattern.
x * - 1 = negate x

-- In these examples, the pretty-printer should not insert extra parentheses.
Just x <> Nothing = Just x
f (- 1 `Q` _) = ()