是否可以定义一个通用的求幂运算符，其接口如下:
> 10^3 // 1000
> 2.71^2 // 7.3441
> 3.14^(-3.14) // 0.027..
According to the docs it's possible to extend classes with infix functions:
// Define extension to Int
infix fun Int.exp(exponent: Int): Int {
...
}
但他们不允许像^这样的符号
Unfortunately, you cannot define new operators, there's only a predefined set of those that can be overloaded. Some operators might be added to this set later, there's an open issue for that in the Kotlin issue tracker.
However, you can use backticked names to define infix extension functions which look like operators (much less pretty though):
infix fun Int.`^`(exponent: Int): Int = ...
Usage:
5 `^` 3
Note that infix functions have precedence lower than that of operators, thus
1 + 1 `^` 3 == 8