gistfile1.cpp

#include <functional>
#include <cstdio>

std::function<void (void)> func;

struct A
{
    A(int n_) : n(n_)
    {
        printf("%p A()\n", this);
    }

    A(const A &a) : n(a.n)
    {
        printf("%p A(A &a) %p\n", this, &a);
    }

    A(const A &&a) : n(a.n)
    {
        printf("%p A(A &&a) %p\n", this, &a);
    }

    ~A()
    {
        printf("%p ~A()\n", this);
    }

    int n;
};

void f(const A &a)
{
    printf("hi %d! @ %p\n", a.n, &a);
}

void setup(int n)
{
    A a(n);

    f(a);

    func = [=]{ f(a); };
}

int main(int argc, char *argv[])
{
    setup(10);

    puts("func()");
    func();

    setup(20);

    func();

    return 0;
}

gistfile2.txt

clang++ -std=c++11 -stdlib=libc++ f.cpp -O3
0x7fff506d1930 A()
hi 10! @ 0x7fff506d1930
0x7fff506d1928 A(A &a) 0x7fff506d1930
0x7fff506d1938 A(A &&a) 0x7fff506d1928
0x7fe608c000e8 A(A &&a) 0x7fff506d1938
0x7fff506d1938 ~A()
0x7fff506d1928 ~A()
0x7fff506d1930 ~A()
func()
hi 10! @ 0x7fe608c000e8
0x7fff506d19a0 A()
hi 20! @ 0x7fff506d19a0
0x7fff506d19a0 ~A()
hi 10! @ 0x7fe608c000e8
0x7fe608c000e8 ~A()