Constant HASKELL 

pub const HASKELL: &str = r#"
    (function
      name: (variable) @name) @function

    (signature
      name: (variable) @name) @signature

    (type_synomym
      name: (type) @name) @type

    (newtype
      name: (type) @name) @newtype

    (adt
      name: (type) @name) @data

    (class
      name: (type) @name) @class
"#;

Haskell symbol extraction query