codegen: Fix support of dynamic DBus methods

codegen/valaccodemethodcallmodule.vala

@@ -296,6 +296,7 @@ public class Vala.CCodeMethodCallModule : CCodeAssignmentModule {
 			csizeof.add_argument (new CCodeIdentifier (get_ccode_name (array_type.element_type)));
 			in_arg_map.set (get_param_pos (0.1), csizeof);
 		} else if (m is DynamicMethod) {
+			emit_context.push_symbol (m);
 			m.clear_parameters ();
 			int param_nr = 1;
 			foreach (Expression arg in expr.get_argument_list ()) {
@@ -320,6 +321,7 @@ public class Vala.CCodeMethodCallModule : CCodeAssignmentModule {
 				param.accept (this);
 			}
 			generate_dynamic_method_wrapper ((DynamicMethod) m);
+			emit_context.pop_symbol ();
 		} else if (m is CreationMethod && context.profile == Profile.GOBJECT && m.parent_symbol is Class) {
 			ccode.add_assignment (get_this_cexpression (), new CCodeCastExpression (ccall, get_ccode_name (current_class) + "*"));
 
@@ -873,6 +875,11 @@ public class Vala.CCodeMethodCallModule : CCodeAssignmentModule {
 				ccode.add_expression (destroy_value (unary.inner.target_value));
 			}
 
+			// infer type of out-parameter from argument
+			if (ma.symbol_reference is DynamicMethod && unary.target_value.value_type == null) {
+				unary.target_value.value_type = unary.inner.value_type.copy ();
+			}
+
 			// assign new value
 			store_value (unary.inner.target_value, transform_value (unary.target_value, unary.inner.value_type, arg), expr.source_reference);
 

codegen/valagdbusclientmodule.vala

@@ -43,8 +43,6 @@ public class Vala.GDBusClientModule : GDBusModule {
 	}
 
 	public override void generate_dynamic_method_wrapper (DynamicMethod method) {
-		var dynamic_method = (DynamicMethod) method;
-
 		var func = new CCodeFunction (get_ccode_name (method));
 		func.modifiers = CCodeModifiers.STATIC;
 
@@ -54,10 +52,10 @@ public class Vala.GDBusClientModule : GDBusModule {
 
 		push_function (func);
 
-		if (dynamic_method.dynamic_type.data_type == dbus_proxy_type) {
+		if (method.dynamic_type.data_type == dbus_proxy_type) {
 			generate_marshalling (method, CallType.SYNC, null, method.name, -1);
 		} else {
-			Report.error (method.source_reference, "dynamic methods are not supported for `%s'".printf (dynamic_method.dynamic_type.to_string ()));
+			Report.error (method.source_reference, "dynamic methods are not supported for `%s'".printf (method.dynamic_type.to_string ()));
 		}
 
 		pop_function ();

tests/Makefile.am

@@ -510,6 +510,7 @@ TESTS = \
 	dbus/errors.test \
 	dbus/async.test \
 	dbus/async-errors.test \
+	dbus/dynamic-method.test \
 	dbus/enum-string-marshalling.vala \
 	dbus/signals.test \
 	dbus/filedescriptor.test \

tests/dbus/dynamic-method.test

@@ -0,0 +1,63 @@
+Packages: gio-2.0
+D-Bus
+
+Program: client
+
+async void run () {
+	try {
+		var bus = yield Bus.@get (BusType.SESSION);
+		dynamic DBusProxy test = yield new DBusProxy (bus, DBusProxyFlags.NONE, null, bus.get_unique_name (), "/org/example/test", "org.example.Test");
+		string s;
+		int i = test.do_foo (42, out s);
+		assert (i == 23);
+		assert (s == "foo");
+	} catch {
+	}
+
+	main_loop.quit ();
+}
+
+MainLoop main_loop;
+
+void main () {
+	main_loop = new MainLoop ();
+	run.begin ();
+	main_loop.run ();
+}
+
+Program: server
+
+[DBus (name = "org.example.Test")]
+class Test : Object {
+	public int do_foo (int i, out string s) throws Error {
+		assert (i == 42);
+		s = "foo";
+		return 23;
+	}
+}
+
+MainLoop main_loop;
+
+void client_exit (Pid pid, int status) {
+	// client finished, terminate server
+	assert (status == 0);
+	main_loop.quit ();
+}
+
+void main () {
+	var conn = Bus.get_sync (BusType.SESSION);
+	conn.register_object ("/org/example/test", new Test ());
+
+	// try to register service in session bus
+	var request_result = conn.call_sync ("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", "RequestName",
+	                                      new Variant ("(su)", "org.example.Test", 0x4), null, 0, -1);
+	assert ((uint) request_result.get_child_value (0) == 1);
+
+	// server ready, spawn client
+	Pid client_pid;
+	Process.spawn_async (null, { "dbus_dynamic_method_client" }, null, SpawnFlags.DO_NOT_REAP_CHILD, null, out client_pid);
+	ChildWatch.add (client_pid, client_exit);
+
+	main_loop = new MainLoop ();
+	main_loop.run ();
+}

vala/valamemberaccess.vala

@@ -398,6 +398,7 @@ public class Vala.MemberAccess : Expression {
 						m.add_error_type (err);
 						m.access = SymbolAccessibility.PUBLIC;
 						m.add_parameter (new Parameter.with_ellipsis ());
+						m.this_parameter = new Parameter ("this", dynamic_object_type.copy ());
 						dynamic_object_type.type_symbol.scope.add (null, m);
 						symbol_reference = m;
 					}