metaprogram

From OO to Generic Programming, Template Metaprogram, Generative Programming;

从OO到泛型到模板元到产生；

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.

不仅因为虚拟函数的间接调用降低了序的速度，还是一堵不透明的墙，元无法穿过。