chennels prototyped

include/gp/vfs/channel_fs.hpp

@@ -9,7 +9,21 @@ namespace gp {
 	class self_filling_channel{
 		error_function on_error;
 		pop_function filler;
-	public:
+		
+		gp::buffer<char>::associated_iterator push(gp::buffer<char> input) {
+			return filler(input);
+		}
+		gp::buffer<char>::associated_iterator pop(gp::buffer<char> dest) {
+			on_error();
+			return dest.begin();
+		}
+	};
+
+	template<typename error_function, typename push_function>
+	class input_channel{
+		error_function on_error;
+		push_function filler;
+		
 		gp::buffer<char>::associated_iterator push(gp::buffer<char> input) {
 			on_error();
 			return input.begin();