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// Compiler options: -langversion:experimental
using System;
class TypePattern
{
public static int Main ()
{
object o = 3;
bool r = o is System.String t1;
if (t1 != null)
return 1;
if (r)
return 2;
if (o is string t2)
return 3;
if (t2 != null)
return 4;
object o2 = (int?) 4;
bool r2 = o2 is byte? t3;
if (t3 != null)
return 5;
if (r2)
return 6;
long? l = 5;
bool r3 = l is long t4;
if (t4 != 5)
return 7;
if (!r3)
return 8;
Console.WriteLine ("ok");
return 0;
}
}
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