SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "main"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        RECORD_EXPR
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "S"
          WHITESPACE " "
          RECORD_EXPR_FIELD_LIST
            L_CURLY "{"
            WHITESPACE " "
            RECORD_EXPR_FIELD
              ATTR
                POUND "#"
                L_BRACK "["
                META
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "cfg"
                  TOKEN_TREE
                    L_PAREN "("
                    IDENT "test"
                    R_PAREN ")"
                R_BRACK "]"
              WHITESPACE " "
              NAME_REF
                IDENT "field"
              COLON ":"
              WHITESPACE " "
              LITERAL
                INT_NUMBER "1"
            WHITESPACE " "
            R_CURLY "}"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
