1 files changed, 22 insertions, 0 deletions
diff --git a/src/plugins/xml/XmlOutput.cpp b/src/plugins/xml/XmlOutput.cpp
index e67ec19..80b3af5 100644
--- a/src/plugins/xml/XmlOutput.cpp
+++ b/src/plugins/xml/XmlOutput.cpp
@@ -514,6 +514,23 @@ static Rooted<Element> transformEnumType(Handle<Element> parent,
 	return enumType;
 }
 
+static Rooted<Element> transformConstant(Handle<Element> parent,
+                                         Handle<Typesystem> t,
+                                         Handle<Constant> c, TransformParams &P)
+{
+	// create an xml element for the constant.
+	Rooted<Element> constant{new Element(P.mgr, parent, "constant")};
+	addNameAttribute(c, constant->getAttributes());
+	// add the type reference
+	{
+		std::string typeRef = getTypeRef(t, c->getType());
+		constant->getAttributes().emplace("type", typeRef);
+	}
+	// add the value
+	constant->getAttributes().emplace("value", toString(c->getValue(), P));
+	return constant;
+}
+
 Rooted<Element> transformTypesystem(Handle<Element> parent,
                                     Handle<Typesystem> t, TransformParams &P)
 {
@@ -560,6 +577,11 @@ Rooted<Element> transformTypesystem(Handle<Element> parent,
 			typesystem->addChild(type);
 		}
 	}
+	// transform all constants.
+	for (auto c : t->getConstants()) {
+		Rooted<Element> constant = transformConstant(typesystem, t, c, P);
+		typesystem->addChild(constant);
+	}
 	// return the transformed Ontology.
 	return typesystem;
 }