How can I emulate destructuring in C++?

后端未结

关注

 5  1239

轻奢々 2020-12-29 01:44

In JavaScript ES6, there is a language feature known as destructuring. It exists across many other languages as well.

In JavaScript ES6, it looks like this:

5条回答

情话喂你 (楼主)

2020-12-29 02:08

Mostly there with std::map and std::tie:

#include 
#include 
#include 
using namespace std;

// an abstact object consisting of key-value pairs
struct thing
{
    std::map kv;
};


int main()
{
    thing animal;
    animal.kv["species"] = "dog";
    animal.kv["sound"] = "woof";

    auto species = std::tie(animal.kv["species"], animal.kv["sound"]);

    std::cout << "The " << std::get<0>(species) << " says " << std::get<1>(species) << '\n';

    return 0;
}

0 讨论(0)

查看其它5个回答