Viewing file:  is_base_of.C (1.66 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
// { dg-do run }
#include <cassert>
class A1
{
double a;
double b;
};
class A2
{
double a;
double b;
};
class B
: private A1 { };
class C
: private A1, private A2 { };
union U
{
double a;
double b;
};
template<typename T, typename U>
bool
f()
{ return __is_base_of(T, U); }
template<typename T, typename U>
class My
{
public:
bool
f()
{ return !!__is_base_of(T, U); }
};
template<typename T, typename U>
class My2
{
public:
static const bool trait = __is_base_of(T, U);
};
template<typename T, typename U>
const bool My2<T, U>::trait;
template<typename T, typename U, bool b = __is_base_of(T, U)>
struct My3_help
{ static const bool trait = b; };
template<typename T, typename U, bool b>
const bool My3_help<T, U, b>::trait;
template<typename T, typename U>
class My3
{
public:
bool
f()
{ return My3_help<T, U>::trait; }
};
#define PTEST(T, U) (__is_base_of(T, U) && f<T, U>() \
&& My<T, U>().f() && My2<T, U>::trait && My3<T, U>().f())
#define NTEST(T, U) (!__is_base_of(T, U) && !f<T, U>() \
&& !My<T, U>().f() && !My2<T, U>::trait && !My3<T, U>().f())
int main()
{
assert (NTEST (int, A1));
assert (NTEST (A1, void));
assert (PTEST (A1, A1));
assert (NTEST (A1*, A1*));
assert (NTEST (A1&, A1&));
assert (PTEST (A1, B));
assert (NTEST (B, A1));
assert (PTEST (A1, C));
assert (PTEST (A2, C));
assert (NTEST (C, A1));
assert (PTEST (A1, const B));
assert (NTEST (const B, A1));
assert (PTEST (A1, volatile C));
assert (PTEST (volatile A2, const C));
assert (NTEST (const volatile C, A1));
assert (NTEST (U, U));
return 0;
}
|
