76 lines
901 B
C#
76 lines
901 B
C#
//
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// Conversions involving type parameters (26.7.4).
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// This is a compilation-only test since some of the explict
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// conversions would trigger an InvalidCastException.
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//
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using System;
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interface Foo
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{
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void Hello ();
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}
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class A
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{ }
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class B : A, Foo
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{
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public void Hello ()
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{ }
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public static implicit operator C (B b)
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{
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return new C ();
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}
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}
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class C
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{
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public static explicit operator B (C c)
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{
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return new B ();
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}
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}
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class Test
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{
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static void Simple<T> (T t)
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{
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object o = t;
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t = (T) o;
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Foo foo = (Foo) t;
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t = (T) foo;
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}
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static void Interface<T> (T t)
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where T : Foo
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{
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Foo foo = t;
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}
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static void Class<T> (T t)
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where T : B
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{
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B b = t;
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A a = t;
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Foo foo = t;
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t = (T) b;
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t = (T) a;
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t = (T) foo;
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C c = t;
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t = (T) c;
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}
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static void Array<T> (T[] t)
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{
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object o = t;
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Array a = t;
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t = (T []) o;
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t = (T []) a;
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}
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public static void Main ()
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{ }
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}
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