elm/compiler/SourceSyntax/PrettyPrint.hs

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385 B
Haskell

module SourceSyntax.PrettyPrint where
import Text.PrettyPrint
import qualified SourceSyntax.Helpers as Help
class Pretty a where
pretty :: a -> Doc
instance Pretty () where
pretty () = empty
commaCat docs = cat (punctuate comma docs)
commaSep docs = sep (punctuate comma docs)
parensIf bool doc = if bool then parens doc else doc
variable x = parensIf (Help.isOp x) (text x)