vala: Non nullable enum types are simple types

Fixes a regression of 5b6345a6386b05aaf3f11cb3572940413eb878a8

Fixes https://gitlab.gnome.org/GNOME/vala/issues/1268

4 files changed, 71 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 396565164..0087ad5f1 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -101,6 +101,7 @@ TESTS = \
 	constants/array-type-invalid.test \
 	constants/glog.vala \
 	constants/member-access.vala \
+	constants/member-access-enum.vala \
 	constants/strings.vala \
 	namespace/unique.vala \
 	arrays/cast-silent-invalid.test \
@@ -322,6 +323,7 @@ TESTS = \
 	control-semantic/variadic-argument-invalid.test \
 	enums/default-gtype.vala \
 	enums/enum_only.vala \
+	enums/enum-boxed.vala \
 	enums/enum-no-gtype.vala \
 	enums/enum-gtype-too-short.test \
 	enums/enums.vala \
diff --git a/tests/constants/member-access-enum.vala b/tests/constants/member-access-enum.vala
new file mode 100644
index 000000000..e0acb412f
--- /dev/null
+++ b/tests/constants/member-access-enum.vala
@@ -0,0 +1,27 @@
+enum Foo {
+	MANAM = 23,
+	MINIM = 42
+}
+
+const Foo FOO = Foo.MANAM;
+const Foo FAZ = Foo.MINIM;
+
+class Bar {
+	public unowned Foo? foo;
+
+	public Bar (Foo _foo) {
+		foo = _foo;
+	}
+}
+
+void main () {
+	Bar bar;
+	{
+		bar = new Bar (FOO);
+	}
+	assert (bar.foo == 23);
+	{
+		bar.foo = FAZ;
+	}
+	assert (bar.foo == 42);
+}
diff --git a/tests/enums/enum-boxed.vala b/tests/enums/enum-boxed.vala
new file mode 100644
index 000000000..75c1ceaa6
--- /dev/null
+++ b/tests/enums/enum-boxed.vala
@@ -0,0 +1,39 @@
+enum Foo {
+	BAR = 23
+}
+
+const Foo FOO = Foo.BAR;
+
+[Flags]
+enum Bar {
+	FOO = 42
+}
+
+const Bar BAR = Bar.FOO;
+
+void main () {
+	{
+		Foo? foo = Foo.BAR;
+		assert (foo == 23);
+	}
+	{
+		Foo? foo = FOO;
+		assert (foo == 23);
+	}
+	{
+		var foo = (Foo?) FOO;
+		assert (foo == 23);
+	}
+	{
+		Bar? bar = Bar.FOO;
+		assert (bar == 42);
+	}
+	{
+		Bar? bar = BAR;
+		assert (bar == 42);
+	}
+	{
+		var bar = (Bar?) BAR;
+		assert (bar == 42);
+	}
+}
diff --git a/vala/valadatatype.vala b/vala/valadatatype.vala
index b465fa0df..0385ea618 100644
--- a/vala/valadatatype.vala
+++ b/vala/valadatatype.vala
@@ -464,6 +464,9 @@ public abstract class Vala.DataType : CodeNode {
 		if (s != null && s.is_simple_type ()) {
 			return !nullable;
 		}
+		if (type_symbol is Enum) {
+			return !nullable;
+		}
 		return false;
 	}