SOURCE_FILE
  STRUCT
    STRUCT_KW "struct"
    WHITESPACE " "
    NAME
      IDENT "S"
    GENERIC_PARAM_LIST
      L_ANGLE "<"
      ERROR
        INT_NUMBER "90"
  WHITESPACE " "
  ERROR
    PLUS "+"
  WHITESPACE " "
  ERROR
    INT_NUMBER "2"
  ERROR
    R_ANGLE ">"
  WHITESPACE " "
  ERROR
    L_CURLY "{"
    WHITESPACE "\n    "
    EXPR_STMT
      PATH_EXPR
        PATH
          PATH_SEGMENT
            NAME_REF
              IDENT "f"
    ERROR
      COLON ":"
    WHITESPACE " "
    PATH_EXPR
      PATH
        PATH_SEGMENT
          NAME_REF
            IDENT "u32"
    WHITESPACE "\n"
    R_CURLY "}"
  WHITESPACE "\n\n"
  STRUCT
    STRUCT_KW "struct"
    WHITESPACE " "
    NAME
      IDENT "T"
    SEMICOLON ";"
  WHITESPACE "\n"
error 9: expected generic parameter
error 11: expected R_ANGLE
error 11: expected `;`, `{`, or `(`
error 12: expected an item
error 14: expected an item
error 15: expected an item
error 17: expected an item
error 24: expected SEMICOLON
error 24: expected expression