metaprogram

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

从OO到泛型到模板元编到产生式编；

2.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的速度，还是一堵不透明的墙，元编无法穿。