goto example for blog post

goto.c

void example()
{
    A *a;
    B *b = NULL;
 
    a = a_new();
 
    if (! a){
        goto end;
    }
 
    b = b_new(a);
    if (! b){
        goto end;
    }
 
    use_b(b);
 
end:
    b_delete(b);
    a_delete(a);
    puts("bye");
}