ambiguous function

Unfortunately, once you start writing general predicates describing the values you would like to handle within a particular function body, it becomes easy to create ambiguous conditions.

不幸的是，一旦您开始编写通用的断言来描述自己希望在某个特定的函数体中处理的值时，就很容易创建一些模糊的条件。

There is more than one function that matches and none of the matches is clearly best. This case is also an error; the call is ambiguous .

存在多个与实参匹配的函数，但没有一个是明显的最佳选择。这种情况也是，该调用具有二义性。

If after looking at each argument there is no single function that is preferable, then the call is in error. The compiler will complain that the call is ambiguous.

如果在检查了所有实参后，仍找不到唯一最佳匹配函数，则该调用错误。编译器将提示该调用具有二义性。