File: virtual_inheritance.cc

package info (click to toggle)
gcc-avr 1%3A5.4.0%2BAtmel3.6.2-3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 589,884 kB
  • sloc: ansic: 2,775,581; ada: 756,757; cpp: 723,977; f90: 117,673; asm: 66,897; makefile: 62,756; xml: 44,466; sh: 29,549; exp: 23,315; objc: 15,216; fortran: 10,901; pascal: 4,185; python: 4,093; perl: 2,969; awk: 2,811; ml: 2,385; cs: 879; yacc: 316; lex: 198; haskell: 112; lisp: 8
file content (48 lines) | stat: -rw-r--r-- 857 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
// { dg-do run }

#include <assert.h>
struct V {
  V(): virtual_value(-123) {}
  int virtual_value;
  virtual int access_vv() { return virtual_value; }
};

struct A: virtual public V {
  A():value(123) {}
    int value;
    virtual int access() { return value; }
};
struct B: virtual public V {
  B():value(456) {}
    int value;
    virtual int access() { return value; }
};
struct C : public A, public B {
  C():better_value(789) {}
    int better_value;
    virtual int access() { return better_value; }
};
struct D: public A, public B {
  D():better_virtual_value(-345) {}
  int better_virtual_value;
  virtual int access_vv() { return better_virtual_value; }
};

int use(B *b)
{
    return b->access();
}

int v_use(V * v)
{
  return v->access_vv();
}

int main()
{
  C c;
  assert(v_use(&c) == -123);
  D d;
  assert(v_use(&d) == -345);
  return 0;
}