lessandro · December 20, 2015 14:29
diff --git a/gistfile1.cpp b/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;
 }
diff --git a/gistfile2.txt b/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()