SOURCE_FILE@0..19
  FN@0..18
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..4
      IDENT@3..4 "f"
    PARAM_LIST@4..6
      L_PAREN@4..5 "("
      R_PAREN@5..6 ")"
    WHITESPACE@6..7 " "
    BLOCK_EXPR@7..18
      L_CURLY@7..8 "{"
      WHITESPACE@8..9 " "
      PATH_EXPR@9..16
        PATH@9..16
          PATH_SEGMENT@9..16
            NAME_REF@9..10
              IDENT@9..10 "S"
            GENERIC_ARG_LIST@10..16
              COLON2@10..12 "::"
              L_ANGLE@12..13 "<"
              CONST_ARG@13..15
                PREFIX_EXPR@13..15
                  MINUS@13..14 "-"
                  LITERAL@14..15
                    INT_NUMBER@14..15 "1"
              R_ANGLE@15..16 ">"
      WHITESPACE@16..17 " "
      R_CURLY@17..18 "}"
  WHITESPACE@18..19 "\n"