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// c++1x tutorial
// created by changkun at shiyanlou.com
// lambda expression
#include <iostream>
#include <utility>
void learn_lambda_func_1() {
    int value_1 = 1;
    auto copy_value_1 = [value_1] {
        return value_1;
    value_1 = 100;
    auto stored_value_1 = copy_value_1();
    // 这时, stored_value_1 == 1, 而 value_1 == 100.
    // 因为 copy_value_1 在创建时就保存了一份 value_1 的拷贝
void learn_lambda_func_2() {
    int value_2 = 1;
    auto copy_value_2 = [&value_2] {
        return value_2;
    value_2 = 100;
    auto stored_value_2 = copy_value_2();
    // 这时, stored_value_2 == 100, value_1 == 100.
    // 因为 copy_value_2 保存的是引用
int main() {
    learn_lambda_func_1();
    learn_lambda_func_2();
    auto important = std::make_unique<int>(1);
    auto add = [v1 = 1, v2 = std::move(important)](int x, int y) -> int {
        return x+y+v1+(*v2);
    std::cout << add(3,4) << std::endl;
    // 泛型 lambda
    auto generic = [](auto x, auto y) {
        return x+y;
    generic(1, 2);
    generic(1.1, 2.2);
    return 0;

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