vector类型变量在main之前初始化

C++初始化普通成员的特点来调用静态初始化函数。当然，这需要定义一个额外的静态成员变量来辅助一下。

#include <iostream>
#include <string>
#include <vector>

class Test1
{
public:
	Test1()
	{
		std::cout << "Test1 constructor..." << std::endl;
	};
	virtual ~Test1()
	{
		std::cout << "Test1 deconstructor..." << std::endl;
	};
};

class Test2 
{
public:
	static std::vector<std::string> stringList;
private:
	static bool __init;
	static bool init() 
	{
		stringList.push_back("string1...");
		stringList.push_back("string2...");
		stringList.push_back("string3...");

		return true;
	}
};

Test1 test1;

std::vector<std::string> Test2::stringList;
bool Test2::__init = Test2::init();

int main()
{
	std::cout << Test2::stringList.size() << std::endl;
	return EXIT_SUCCESS;
}