c++ - 为什么错误: ‘locate_zone’ is not a member of ‘std::chrono’

Question

代码:

//test.cpp
#include<chrono>
#include<string>
using namespace std;
int main(){
  string str("Europe/Oslo");
  std::chrono::locate_zone(str);
}

编译:

/tools/gcc/6.3.0/bin/g++ --std=c++11 test.cpp

输出:

test.cpp: In function ‘int main()’:

test.cpp:6:3: 错误:“locate_zone”不是“std::chrono”的成员 std::chrono::locate_zone(str); ^~~

Answer 1

您现在可以使用 Howard Hinnant's free, open source, time zone library 来体验这个 C++20 特性.

您需要将命名空间从 std::chrono 更改为 date:

#include "date/tz.h"
#include<chrono>
#include<string>
using namespace std;
int main(){
  string str("Europe/Oslo");
  date::locate_zone(str);
}

Some installation required.

Help is available.