Made unsupported expressions a separate type for disambiguation to fix issues with unsupported features.

tests/TestPDDLTranslation.cpp

@@ -0,0 +1,21 @@
+#include <gtest/gtest.h>
+
+#include <boost/iostreams/stream.hpp>
+#include <boost/iostreams/device/null.hpp>
+
+#include <plasp/pddl/Description.h>
+#include <plasp/pddl/TranslatorASP.h>
+
+using namespace plasp::pddl;
+
+boost::iostreams::stream<boost::iostreams::null_sink> nullStream((boost::iostreams::null_sink()));
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+TEST(PDDLTranslationTests, CheckIssues)
+{
+	// Check that translating domains without typing information works
+	const auto description = Description::fromFile("data/issues/issue-4.pddl");
+	const auto translator = TranslatorASP(description, nullStream);
+	ASSERT_NO_THROW(translator.translate());
+}