1 files changed, 44 insertions, 0 deletions
diff --git a/src/brussel.common/RTTI.hpp b/src/brussel.common/RTTI.hpp
new file mode 100644
index 0000000..bd9475b
--- /dev/null
+++ b/src/brussel.common/RTTI.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <cassert>
+
+template <typename T, typename TBase>
+bool is_a(TBase* t) {
+	assert(t != nullptr);
+	return T::IsInstance(t);
+}
+
+template <typename T, typename TBase>
+bool is_a_nullable(TBase* t) {
+	if (t) {
+		return is_a<T, TBase>(t);
+	} else {
+		return false;
+	}
+}
+
+template <typename T, typename TBase>
+T* dyn_cast(TBase* t) {
+	assert(t != nullptr);
+	if (T::IsInstance(t)) {
+		return static_cast<T*>(t);
+	} else {
+		return nullptr;
+	}
+}
+
+template <typename T, typename TBase>
+const T* dyn_cast(const TBase* t) {
+	assert(t != nullptr);
+	if (T::IsInstance(t)) {
+		return static_cast<const T*>(t);
+	} else {
+		return nullptr;
+	}
+}
+
+template <typename T, typename TBase>
+T* dyn_cast_nullable(TBase* t) {
+	if (!t) return nullptr;
+	return dyn_cast<T, TBase>(t);
+}