     "LIBRARY:"
     "M:" "M::" "MACRO:" "MACRO::" "MAIN:" "MATH:"
     "MEMO:" "MEMO:" "METHOD:" "MIXIN:"
+    "NAN:"
     "OCT:"
     "POSTPONE:" "PREDICATE:" "PRIMITIVE:" "PRIVATE>" "PROVIDE:"
     "QUALIFIED-WITH:" "QUALIFIED:"

    "SINGLETON:" "SINGLETONS:" "SLOT:" "SPECIALIZED-ARRAY:" "SPECIALIZED-ARRAYS:" "STRING:" "STRUCT:" "SYMBOL:" "SYMBOLS:" "SYNTAX:"
    "TUPLE:" "t" "t?" "TYPEDEF:" "TYPED:" "TYPED::"
    "UNIFORM-TUPLE:" "UNION:" "UNION-STRUCT:" "USE:" "USING:"
    "VARS:" "VERTEX-FORMAT:"))

(defconst fuel-syntax--parsing-words-regex
  (regexp-opt fuel-syntax--parsing-words 'words))

   '("IN:" "USE:" "FROM:" "EXCLUDE:" "QUALIFIED:" "QUALIFIED-WITH:")))

(defconst fuel-syntax--int-constant-def-regex
  (fuel-syntax--second-word-regex '("ALIEN:" "CHAR:" "BIN:" "HEX:" "NAN:" "OCT:")))

(defconst fuel-syntax--type-definition-regex
  (fuel-syntax--second-word-regex
