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    "
        MACRO_CALL
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "foo"
          BANG "!"
          WHITESPACE " "
          TOKEN_TREE
            L_PAREN "("
            WHITESPACE "\n        "
            IDENT "bar"
            COMMA ","
            WHITESPACE " "
            STRING "\"baz\""
            COMMA ","
            WHITESPACE " "
            INT_NUMBER "1"
            COMMA ","
            WHITESPACE " "
            FLOAT_NUMBER "2.0"
        WHITESPACE "\n    "
        R_CURLY "}"
  WHITESPACE " "
  COMMENT "//~ ERROR incorrect close delimiter"
  WHITESPACE "\n"
  ERROR
    R_CURLY "}"
  WHITESPACE "\n"
error 49: unmatched `}`
error 92: unmatched `}`