File: haskell.lang

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Description="Haskell"

Categories = {"source"}

Keywords={
  -- Type-level keywords
  { Id=1,
    List={"class", "data", "deriving", "instance", "default", "type", "newtype"}
  },
  -- Module-level keywords
  { Id=2,
    List={"module", "import", "where", "foreign", "qualified", "as", "hiding", "infix", "infixl", "infixr"}
  },
  -- Expression-level keywords
  { Id=4,
    List={"if", "then", "else", "case", "of", "do", "let", "in"}
  },
  -- Special syntax
  { Id=3,
    Regex=[[ [\[\](),;}]+|{(?!-) ]]
  },
}

Strings={
  Delimiter=[["|']],
}

-- Escape sequences only occur inside strings
-- strings ending with ' should not be confused with identifiers
-- TDOD check ' and "
function OnStateChange(oldState, newState, token, kwgroup)
  if newState==HL_ESC_SEQ and oldState~=HL_STRING or string.match(token, "%a+'" ) and oldState==HL_STRING then
    return HL_REJECT
  end

  return newState
end

Identifiers=[[ [a-zA-Z][a-zA-Z0-9_']* ]]

IgnoreCase=false

Comments={
  { Block=false,
    Delimiter= { [[--]] },
  },
  { Block=true,
    Nested=false,
    Delimiter= { [[\{\-]],[[\-\}]],}
  }
}

Operators=[[ `[a-z][a-zA-Z0-9_']*`|#(?!-})|[!$%&*+\./<=>?@^\|~-]+ ]]