使用不会抛出超载.

bool exists(const path& p, system::error_code& ec) noexcept;

但是，您将需要检查输出参数，因此这可能比捕获异常还要耗费更多精力.这取决于您要完成的工作.

You will want to check the output parameter however, so this may be more work than catching an exception. It depends what you're trying to accomplish.