您可以提供一个明确的模板参数:

You can give an explicit template argument:

bar<int(int)>(3, foo);

或将模棱两可的函数名强制转换为可以从中推导出模板参数的类型:

or cast the ambiguous function name to a type from which the template argument can be deduced:

bar(3, static_cast<int(*)(int)>(foo));

或将其包装在另一个函数(或函数对象)中以消除歧义

or wrap it in another function (or function object) to remove the ambiguity

bar(3, [](int x){return foo(x);});