What is the type of lambda functions? C ++

Question

See my code:

#include <iostream>
#include <typeinfo>

int main() {
    auto x = [](int a, int b) -> bool{return a<b;};
    std::cout<<typeid(decltype(x)).name()<<std::endl;
}

And it prints Z4mainEUliiE_. Can anyone explain who? And what is the actual type of x ??

Answer 1

The actual lambda type is indicated as a "unique closure type" that matches the lambda expression.

His name is not indicated. Its layout is not even fully defined. This is an almost completely defined type of implementation, a name that usually does not know and does not care.

And when you think about it, you (the developer) do not need to know what its "actual name" is. You can refer to it just fine:

using my_lambda_type = decltype(x);

---

, , , std::type_info::name . .

(++ - ), .