Can GCC optimize methods of a class with compile-time constant variables?

GCC编译时常数可以与变量的一类方法优化？

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GCC provides a built-in function that you can use to determine whether a value is a constant at compile-time.

在编译时，可以使用GCC提供的一个内置函数判断一个值是否是常量。

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The standardese way of looking at things is simply that the value you supply as a template argument must be a constant known at compile time.

standardese看待事物的方式是，您提供作为一个模板参数的值必须在编译时是已知常数。

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