64 lines
1.5 KiB
C#
64 lines
1.5 KiB
C#
// Some interfaces, one is a superset of the other
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public interface Node
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{
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int GetStat();
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}
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public interface FileNode : Node
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{
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int NotUsed();
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}
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// Some basic implementations, one is a superset of the other
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public class GenericNode : Node
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{
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public virtual int GetStat() { return 0; }
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}
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public class GenericFileNode : GenericNode , FileNode
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{
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public virtual int NotUsed() { return -1; }
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}
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// Now the ability to override a method depends on if we specify again that we
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// implement an interface -- although we must because we derive from a class
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// that does.
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public class WorkingTest : GenericFileNode , FileNode
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{
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public override int GetStat() { return 42; }
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}
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public class FailingTest : GenericFileNode
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{
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// This never gets called, but it builds, so what did we override?!!!
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public override int GetStat() { return 42; }
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}
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public class TestWrapper
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{
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static bool Test(Node inst, string name)
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{
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if(inst.GetStat() == 42)
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{
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System.Console.WriteLine("{0} -- Passed", name);
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return true;
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} else
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{
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System.Console.WriteLine("{0} -- FAILED", name);
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return false;
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}
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}
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public static int Main()
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{
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if( Test(new WorkingTest(), "WorkingTest")
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&& Test(new FailingTest(), "FailingTest") )
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return 0; // everything worked
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else
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return 1;
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}
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}
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