61 lines
1017 B
C#
61 lines
1017 B
C#
using System;
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using System.Linq.Expressions;
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struct Foo
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{
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public static bool operator > (Foo d1, Foo d2)
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{
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throw new ApplicationException ();
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}
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public static bool operator < (Foo d1, Foo d2)
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{
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throw new ApplicationException ();
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}
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public static bool operator == (Foo d1, Foo d2)
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{
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throw new ApplicationException ();
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}
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public static bool operator != (Foo d1, Foo d2)
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{
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throw new ApplicationException ();
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}
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public static Foo operator + (Foo d1, Foo d2)
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{
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throw new ApplicationException ();
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}
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}
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class C
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{
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public static int Main()
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{
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Foo f;
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Expression<Func<bool>> e = () => f > null;
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if (e.Compile ().Invoke ())
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return 1;
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e = () => f < null;
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if (e.Compile ().Invoke ())
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return 2;
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e = () => f == null;
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if (e.Compile ().Invoke ())
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return 3;
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e = () => f != null;
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if (!e.Compile ().Invoke ())
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return 4;
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Expression<Func<Foo?>> e2 = () => f + null;
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if (e2.Compile ().Invoke () != null)
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return 5;
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Console.WriteLine ("OK");
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return 0;
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}
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}
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