SOURCE_FILE
  CONST
    CONST_KW "const"
    WHITESPACE " "
    NAME
      IDENT "A"
    COLON ":"
    WHITESPACE " "
    REF_TYPE
      AMP "&"
      SLICE_TYPE
        L_BRACK "["
        PATH_TYPE
          PATH
            PATH_SEGMENT
              NAME_REF
                IDENT "i64"
        R_BRACK "]"
    WHITESPACE " "
    EQ "="
    WHITESPACE " "
    REF_EXPR
      AMP "&"
      ARRAY_EXPR
        L_BRACK "["
        LITERAL
          INT_NUMBER "1"
        COMMA ","
        WHITESPACE " "
        LITERAL
          ATTR
            POUND "#"
            L_BRACK "["
            META
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "cfg"
              TOKEN_TREE
                L_PAREN "("
                IDENT "test"
                R_PAREN ")"
            R_BRACK "]"
          WHITESPACE " "
          INT_NUMBER "2"
        R_BRACK "]"
    SEMICOLON ";"
  WHITESPACE "\n"
