c++11 -- Initializer_list

类初始化时的构造函数的搜索顺序：

#include<initializer_list>
#include<iostream>
#include<string>
class cat
{
public:
	cat(int age, std::string name):age(age),name(name) {
		printf("%d,%s", age, name.c_str());
	}

private:
	int age;
	std::string name;
};



class dog {
public:
	int age;

	dog(int a) {
		age = a;
	}

	dog(const std::initializer_list<int>& vec) {
		age = *(vec.begin());
		std::cout << "Initializer_list constructor..." << std::endl;
	}

};

int main() {
	dog d1{ 3 };//initializer_list
	cat c1{ 2,"maomao" };//Aggregate Initailization

	std::cin.get();
}

注意：

initailizer_lis t的迭代器是一个const iterator ---》所以initializer_list里的值是不可以修改的！！

解决方法：把initializer_list隐式转换为vector