codegen: Use get_value_*_function() in GSignalModule.generate_marshaller()

This makes sure to pick up the intended function like the generated ones
for fundamental classes.

Fixes https://gitlab.gnome.org/GNOME/vala/issues/468

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/objects/signals-fundamental-return.vala b/tests/objects/signals-fundamental-return.vala
new file mode 100644
index 000000000..d73ed03fb
--- /dev/null
+++ b/tests/objects/signals-fundamental-return.vala
@@ -0,0 +1,28 @@
+class Maman {
+}
+
+interface IBar : Maman {
+}
+
+class Bar : Maman, IBar {
+}
+
+class Foo {
+	public signal Foo on_foo ();
+	public signal IBar on_bar ();
+}
+
+void main () {
+	var foo = new Foo ();
+	foo.on_foo.connect (() => {
+		return new Foo ();
+	});
+	foo.on_bar.connect (() => {
+		return new Bar ();
+	});
+
+	var bar = foo.on_foo ();
+	assert (bar is Foo);
+	var bar2 = foo.on_bar ();
+	assert (bar2 is IBar);
+}