81 lines
945 B
C#
81 lines
945 B
C#
using System;
|
|
|
|
enum E : sbyte
|
|
{
|
|
V = 1
|
|
}
|
|
|
|
struct S
|
|
{
|
|
public static bool operator == (S s, S i)
|
|
{
|
|
throw new ApplicationException ();
|
|
}
|
|
|
|
public static bool operator != (S s, S i)
|
|
{
|
|
throw new ApplicationException ();
|
|
}
|
|
|
|
public static implicit operator int? (S s)
|
|
{
|
|
throw new ApplicationException ();
|
|
}
|
|
|
|
public static implicit operator E? (S s)
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
class C
|
|
{
|
|
public static int Main ()
|
|
{
|
|
E? a = E.V;
|
|
E? a_n = null;
|
|
E? b = E.V;
|
|
E? b_n = null;
|
|
|
|
if (a != b)
|
|
return 1;
|
|
|
|
if (a == a_n)
|
|
return 2;
|
|
|
|
if (a_n != b_n)
|
|
return 3;
|
|
|
|
E e = (E) 4;
|
|
S s;
|
|
if (e == s)
|
|
return 10;
|
|
|
|
if (s == e)
|
|
return 11;
|
|
|
|
if (e > s)
|
|
return 12;
|
|
|
|
if (s > e)
|
|
return 13;
|
|
|
|
if ((s & e) != null)
|
|
return 14;
|
|
|
|
if ((s & e) != null)
|
|
return 15;
|
|
|
|
var res1 = (E?) 1 == null;
|
|
if (res1)
|
|
return 16;
|
|
|
|
var res2 = null == (E?) 1;
|
|
if (res2)
|
|
return 17;
|
|
|
|
Console.WriteLine ("ok");
|
|
|
|
return 0;
|
|
}
|
|
} |