arrays - 如何将数组传递给 std::make_tuple？

Question

这该怎么做:

#include <tuple>

std::tuple<double, int[2]> f()
{
    return std::make_tuple(0., {1, 2});
}

int main()
{
    f();
    return 0;
}

could not convert 'std::make_tuple<{}>()' from 'std::tuple<>' to 'std::tuple'

编译器不知道该怎么做吗？

Answer 1

如果您需要使用“编译时向量”，请尝试 array .

#include <array>
// ...

std::tuple<double, std::array<int, 2>> f() {
  return std::make_tuple(0., std::array<int, 2>{1, 2});
}

As an aggregate type, it can be initialized with aggregate-initialization given at most N initializers that are convertible to T.