c++ - std::pair 是否存在类似 std::tie 的东西？

Question

例如元组:

#include <tuple>        // std::tuple, std::make_tuple, std::tie

int num;
char letter;
std::tuple<int,char> num_letter;

num_letter = std::make_tuple(10, 'a');
std::tie(num, letter) = num_letter;  // unpack num_letter into num and letter

有没有与pairs等价的东西？

// ...
num_letter = std::make_pair(10, 'a');
std::pair_tie(num, letter) = num_letter;

Answer 1

其实pairs的代码是完全一样的，因为std::tuple有operator = with std::pair as an argument .

num_letter = std::make_pair(10, 'a');
std::tie(num, letter) = num_letter;