Not only does it slow down the program due to the virtual function indirect call, it is also an opaque wall where no metaprogram can get past.
它
仅因为虚拟函数的间接调用降低了
序的速度，它还是一堵透明的墙，
编无法穿过它。
序Not only does it slow down the program due to the virtual function indirect call, it is also an opaque wall where no metaprogram can get past.
它仅因为虚拟函数的间接调用降低了序的速度，它还是一堵透明的墙，编无法穿过它。
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