Possible error in Capture List and Classes

[lopezzot]

Dear Federico,

perhaps an error in 05.Basic_Concepts_IV.pdf slide 33.

auto lambda3 = [this]() { return data; }; // copy by-reference, return 2

it returns 1, not 2.
For instance, the following prints 1 with -std=c++20:

#include <iostream>

class A {
    public:
        int data = 1;

        void f(){
            int var = 2;
            auto lambda3 = [this](){return data;};
            std::cout<<lambda3()<<std::endl;
        }
};   

int main(){
    A a;
    a.f();
    return 0;
}

[lopezzot]

And perhaps another little mistake in 03.Basic_Concepts_II.pdf slide 17.

struct A {int x; int y;};
A array[10] = { {1,2}, {5,6}, {7,1} };
for (auto [x1, y1] : array) cout<<x1<<","<<y1<<" "; //print:1,2 5,6 7,1

I suppose it is A array[] instead of A array[10]. Otherwise it prints

1 2
5 6
7 1
0 0
0 0
0 0
0 0
0 0
0 0
0 0

[lopezzot]

And maybe another one in 07.Object_Oriented_II.pdf slide 26.

static_cast<B&>(a1).f(); // print "A" downcasting

It actually prints "B", not "A". I suppose you meant:

static_cast<B&>(a).f(); // print "A" downcasting

[federico-busato]

Hi @lopezzot, many thanks for pointing out all these issues. I will fix them soon.

[lopezzot]

You are welcome and thanks for this excellent course.