RuntimeAttrs类的构造函数。
RuntimeAttrs() = delete; RuntimeAttrs(const RuntimeAttrs &) = delete; RuntimeAttrs(RuntimeAttrs &&) = delete; RuntimeAttrs &operator=(const RuntimeAttrs &) = delete; RuntimeAttrs &operator=(RuntimeAttrs &&) = delete;
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POD类型，当前不允许通过调用构造函数显式构造，可通过显式申请内存构造。