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using System;
using System.Collections.Generic;
interface IFoo
{
int Foo(int c);
}
interface IAdd
{
int Add(int c);
}
// Only needed for writing IFoo.Foo code
class IFoo_Impl : IFoo
{
public int Foo(int c)
{
IAdd adder = (IAdd) this;
return adder.Add(c);
}
}
struct FooValue : IFoo, IAdd
{
public int val;
public int Foo(int c)
{
val +=c;
return val;
}
public int Add(int c)
{
val +=c;
return val;
}
}
interface IHorrible<T>
{
int GetLocalVal();
void SetLocalVal(int val);
int Horrible();
}
// Only needed for the default interface implementation
class IHorrible_Impl<T> : IHorrible<T>
{
public int GetLocalVal() { return 0; }
public void SetLocalVal(int val) {}
public int Horrible()
{
int val = GetLocalVal();
val++;
SetLocalVal(val);
return val;
}
}
struct HorribleCase<Z> : IHorrible<IList<Z>>, IHorrible<IEnumerable<Z>>
{
int localVal;
public int GetLocalVal() { return localVal; }
public void SetLocalVal(int val) { localVal = val; }
int IHorrible<IList<Z>>.Horrible() { return ++localVal; }
// Remove
int IHorrible<IEnumerable<Z>>.Horrible() { return ++localVal; }
}
class HorribleTest
{
public static int Horror<T,U>(T t) where T:IHorrible<U>
{
return t.Horrible() + t.Horrible();
}
public static void RunTest()
{
Test.Assert(Horror<HorribleCase<object>,IEnumerable<object>>(new HorribleCase<object>())) == 2, "Fail");
Test.Assert(Horror<HorribleCase<object>,IList<object>>(default(HorribleCase<object>)) == 3, "Fail");
}
}
/*
interface IFoo<T>
{
int Foo(int c);
}
interface IAdd
{
int Add(int c);
}
// Only needed for writing IFoo.Foo code
class IFoo_Impl<T> : IFoo<T>
{
public int Foo(int c)
{
IAdd adder = (IAdd) this;
return adder.Add(c);
}
}
struct FooValue<T> : IFoo<T>, IAdd
{
public int val;
public int Foo(int c)
{
val +=c;
return val;
}
public int Add(int c)
{
val +=c;
return val;
}
}
*/
class SimpleConstraintTest
{
public static int CallFoo_WithConstraints<T>(ref T foo, int val) where T : IFoo
{
return foo.Foo(val);
}
/*
public static int CallFoo_WithConstraints<T>(ref T foo, int val) where T : IFoo<object>
{
return foo.Foo(val);
}
*/
public static void RunTest()
{
FooValue foo = new FooValue();
foo.val = 10;
Console.WriteLine("Calling CallFoo_WithConstraints on FooValue - expecting IFoo::Foo");
Test.Assert(CallFoo_WithConstraints(ref foo, 10) == 20, "Calling CallFoo_WithConstraints on FooValue");
Test.Assert(foo.val == 10, "Expecting boxing on CallFoo_WithConstraints");
}
}
class Program
{
public static int Main()
{
HorribleTest.RunTest();
SimpleConstraintTest.RunTest();
return Test.Ret();
}
}
class Test
{
private static bool Pass = true;
public static int Ret()
{
return Pass? 100 : 101;
}
public static void Assert(bool cond, string msg)
{
if (cond)
{
Console.WriteLine("PASS");
}
else
{
Console.WriteLine("FAIL: " + msg);
Pass = false;
}
}
}
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