Vector of function with lambda functions

Question

This code is not correct:

std::vector<int (*)(int)> fv;

for (int i=0; i<10; i++)
{
   auto g = [i](int n) -> int
   {
      return n+i;
   };

   fv.push_back(&g);
}

because lambda functions is not of type int (*)(int) but is an object. My question is: what type I must put in vector<...>?

Answer 1

您可以使用库类型std::function。

例如：

#include <vector>
#include <functional>

void foo() {
  std::vector<std::function<int(int)>> fv;

  for (int i = 0; i < 10; ++i) {
    fv.emplace_back([i](int n) {
      return n + i;
    });
  }
}