38 lines
525 B
C#
38 lines
525 B
C#
using System;
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public abstract class A<T>
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{
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public abstract A<MM> For<MM> () where MM : T;
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}
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public class B<U, X, V> : A<V>
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where V : X
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where X : U
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{
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readonly A<U> _inner;
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public B (A<U> inner)
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{
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_inner = inner;
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}
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public override A<PP> For<PP> () // base constraint is copied as PP : V
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{
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return _inner.For<PP> ();
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}
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}
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public class Test : A<Test>
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{
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public static void Main ()
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{
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var t = new Test ();
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new B<Test, Test, Test> (t).For<Test> ();
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}
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public override A<QQ> For<QQ> ()
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{
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return null;
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}
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}
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