SOURCE_FILE
  STATIC
    STATIC_KW "static"
    WHITESPACE " "
    ERROR
      UNDERSCORE "_"
    COLON ":"
    WHITESPACE " "
    PATH_TYPE
      PATH
        PATH_SEGMENT
          NAME_REF
            IDENT "i32"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    LITERAL
      INT_NUMBER "5"
    SEMICOLON ";"
  WHITESPACE "\n"
error 7: expected a name