codegen: Allow passing/retrieving any delegate to/from varargs parameter

Initialize target/notify cvalues of delegate-typed arguments/result of
inferred varargs parameters and va_list.arg() calls.

Only the actual function pointer will be passed or retrieved. The target
and destroy values will be null.

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/methods/varargs-delegate.vala b/tests/methods/varargs-delegate.vala
new file mode 100644
index 000000000..a797d4c5d
--- /dev/null
+++ b/tests/methods/varargs-delegate.vala
@@ -0,0 +1,30 @@
+delegate string Foo ();
+
+string foo (void* data) {
+	return "foo";
+}
+
+void bar (int first, ...) {
+	assert (first == 23);
+	var args = va_list ();
+	Foo** out_func = args.arg ();
+	*out_func = (Foo*) foo;
+}
+
+void baz (int first, ...) {
+	assert (first == 42);
+	var args = va_list ();
+	Foo func = args.arg ();
+	assert (func () == "foo");
+}
+
+void main () {
+	{
+		Foo func;
+		bar (23, out func);
+		assert (func () == "foo");
+	}
+	{
+		baz (42, foo);
+	}
+}