使用初始化列表分配字符串

Question

• 你能解释一下，为什么会有差异？
• 什么意思PKcE？

代码：

#include <iostream>
#include <typeinfo>
using namespace std;

int main() {
    string s {"IDE"};
    std::cout<<typeid(s).name()<<std::endl;

    auto S{"IDE"};      // why do not deduced as string?
    std::cout<<typeid(S).name()<<std::endl;

    auto c = {"IDE"};  // why do not deduced as string?
    std::cout<<typeid(c).name()<<std::endl;   

    auto C {string{"IDE"}}; // why do not deduced as string?
    std::cout<<typeid(C).name()<<std::endl; 

    auto Z = string{"IDE"};
    std::cout<<typeid(Z).name()<<std::endl; 

}

输出：

Ss
St16initializer_listIPKcE
St16initializer_listIPKcE
St16initializer_listISsE
Ss

Answer 1

string s {"IDE"};  // Type of s is explicit - std::string

auto S{"IDE"};     // Type of S is an initializer list consisting of one char const*.

auto c = {"IDE"};  // Type of c is same as above.

auto C {string{"IDE"}}; // Type of C is an initializer list consisting of one std::string

auto Z = string{"IDE"}; // Type of Z is std::string

我不知道PKcE代表什么。我只能猜测P代表指针，K代表const，c代表字符。不知道E可能代表什么。