93 lines
1.4 KiB
C#
93 lines
1.4 KiB
C#
using System;
|
|
|
|
interface I
|
|
{
|
|
void Foo (bool expected);
|
|
}
|
|
|
|
struct S : I
|
|
{
|
|
bool flag;
|
|
|
|
public void Foo (bool expected)
|
|
{
|
|
Console.WriteLine (flag);
|
|
if (expected != flag)
|
|
throw new ApplicationException ();
|
|
|
|
flag = true;
|
|
}
|
|
}
|
|
|
|
class Program
|
|
{
|
|
static void M<T> (T x)
|
|
{
|
|
object s = x?.ToString ();
|
|
System.Console.WriteLine (s);
|
|
|
|
var h = x?.GetHashCode ();
|
|
System.Console.WriteLine (h);
|
|
}
|
|
|
|
static void M2<T> (T[] x)
|
|
{
|
|
object s = x?.ToString ();
|
|
System.Console.WriteLine (s);
|
|
|
|
var h = x?.GetHashCode ();
|
|
System.Console.WriteLine (h);
|
|
}
|
|
|
|
static void M2_2<T> (T[] x)
|
|
{
|
|
object s = x[0]?.ToString ();
|
|
System.Console.WriteLine (s);
|
|
|
|
var h = x[0]?.GetHashCode ();
|
|
System.Console.WriteLine (h);
|
|
}
|
|
|
|
static void M3<T> (T? x) where T : struct
|
|
{
|
|
object s = x?.ToString ();
|
|
System.Console.WriteLine (s);
|
|
|
|
var h = x?.GetHashCode ();
|
|
System.Console.WriteLine (h);
|
|
}
|
|
|
|
static void TestAddress_1<T> (T t) where T : I
|
|
{
|
|
t?.Foo (false);
|
|
t?.Foo (true);
|
|
}
|
|
|
|
static void TestAddress_2<T> (T[] t) where T : I
|
|
{
|
|
t[0]?.Foo (false);
|
|
t[0]?.Foo (true);
|
|
}
|
|
|
|
static void Main()
|
|
{
|
|
M<string> (null);
|
|
M (1);
|
|
M("X");
|
|
|
|
M2<int> (null);
|
|
M2<string> (null);
|
|
M2 (new [] { 1 });
|
|
M2 (new [] { "x" });
|
|
|
|
M2_2 (new string [1]);
|
|
M2_2 (new int [1]);
|
|
|
|
M3<int> (1);
|
|
M3<byte> (null);
|
|
|
|
TestAddress_1 (new S ());
|
|
var ar = new [] { new S () };
|
|
TestAddress_2 (ar);
|
|
}
|
|
} |