Initial checkin

IDEHelper/Tests/src/Interfaces.bf

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+using System;
+
+namespace Tests
+{
+	class Interfaces
+	{
+		interface IFaceA
+		{
+			int FuncA(int a) mut;
+			int FuncA2() mut { return 0; }
+		}
+
+		interface IFaceB : IFaceA
+		{
+			void FuncB(int a) mut
+			{
+				FuncA(a + 100);
+			}
+		}
+
+		concrete interface IFaceC
+		{
+			concrete IFaceA GetConcreteIA();
+		}
+
+		struct StructA : IFaceB
+		{
+			public int mA = 10;
+
+			int IFaceA.FuncA(int a) mut
+			{
+				mA += a;
+				return mA;
+			}
+		}
+
+		struct StructB : IFaceC
+		{
+			public StructA GetConcreteIA()
+			{
+				return StructA();
+			}
+		}
+
+		static int UseIA<T>(mut T val, int a) where T : IFaceA
+		{
+			return val.FuncA(a);
+		}
+
+		static int UseIA2<T>(mut T val) where T : IFaceA
+		{
+			return val.FuncA2();
+		}
+
+		static void UseIB<T>(mut T val, int a) where T : IFaceB
+		{
+			val.FuncB(a);
+		}
+
+		class ClassA : IFaceA
+		{
+			public int FuncA(int a)
+			{
+				return 5;
+			}
+
+			public virtual int FuncA2()
+			{
+				return 50;
+			}
+		}
+
+		class ClassB : ClassA
+		{
+			public new int FuncA(int a)
+			{
+				return 6;
+			}
+
+			public override int FuncA2()
+			{
+				return 60;
+			}
+		}
+
+		class ClassC : ClassA, IFaceA
+		{
+			public new int FuncA(int a)
+			{
+				return 7;
+			}
+
+			public override int FuncA2()
+			{
+				return 70;
+			}
+		}
+
+		[Test]
+		public static void TestBasics()
+		{
+			StructA sa = .();
+			UseIB(mut sa, 9);
+			Test.Assert(sa.mA == 119);
+
+			ClassA ca = scope ClassA();
+			ClassB cb = scope ClassB();
+			ClassA cba = cb;
+			ClassC cc = scope ClassC();
+			ClassA cca = cc;
+
+			Test.Assert(UseIA(ca, 100) == 5);
+			Test.Assert(UseIA(cb, 100) == 5);
+			Test.Assert(UseIA(cba, 100) == 5);
+			Test.Assert(UseIA((IFaceA)cba, 100) == 5);
+			Test.Assert(UseIA(cc, 100) == 7);
+			Test.Assert(UseIA(cca, 100) == 5);
+
+			Test.Assert(UseIA2(ca) == 50);
+			Test.Assert(UseIA2(cb) == 60);
+			Test.Assert(UseIA2(cba) == 60);
+			Test.Assert(UseIA2((IFaceA)cba) == 60);
+			Test.Assert(UseIA2(cc) == 70);
+			Test.Assert(UseIA2(cca) == 70);
+		}
+	}
+}