Restrict any -> Protocol conversion. Protocol <-> looks at parent. Detect duplicate method definitions for protocols.

test/test_suite/dynamic/any_cast.c3

@@ -0,0 +1,22 @@
+module test;
+
+protocol Abc : Def
+{}
+
+protocol Def
+{}
+
+fn void! test()
+{
+	any* x;
+	Abc* d = x; // #error: cannot implicitly be converted to 'Abc*'
+}
+
+
+fn void! test2()
+{
+	Abc* x;
+	any* d = x;
+	Def* e = x;
+	x = e; // #error: is not a parent protocol of 'Def'
+}

test/test_suite/dynamic/duplicate_definition.c3

@@ -0,0 +1,12 @@
+module test;
+
+protocol Abc
+{
+	fn void abc();
+	fn void abc(); // #error: Duplicate definition
+}
+fn void! main()
+{
+	Abc* g;
+	g.abc();
+}