Initial commit

noarch/include/kangaru/predicate.hpp

@@ -0,0 +1,52 @@
+#ifndef KGR_KANGARU_INCLUDE_KANGARU_PREDICATE_HPP
+#define KGR_KANGARU_INCLUDE_KANGARU_PREDICATE_HPP
+
+#include "type_id.hpp"
+
+namespace kgr {
+
+struct All {
+	constexpr inline bool operator()(type_id_t) const {
+		return true;
+	}
+};
+
+template<typename First, typename... Ts>
+struct NoneOf {
+	constexpr bool operator()(type_id_t id) const {
+		return !compare<type_id<First>, type_id<Ts>...>(id);
+	}
+	
+private:
+	template<type_id_t comp, type_id_t second, type_id_t... others>
+	constexpr bool compare(type_id_t id) const {
+		return id == comp && compare<second, others...>(id);
+	}
+	
+	template<type_id_t comp>
+	constexpr bool compare(type_id_t id) const {
+		return id == comp;
+	}
+};
+
+template<typename First, typename... Ts>
+struct AnyOf {
+	constexpr bool operator()(type_id_t id) const {
+		return compare<type_id<First>, type_id<Ts>...>(id);
+	}
+	
+private:
+	template<type_id_t comp, type_id_t second, type_id_t... others>
+	constexpr bool compare(type_id_t id) const {
+		return id == comp && compare<second, others...>(id);
+	}
+	
+	template<type_id_t comp>
+	constexpr bool compare(type_id_t id) const {
+		return id == comp;
+	}
+};
+
+} // namespace kgr
+
+#endif // KGR_KANGARU_INCLUDE_KANGARU_PREDICATE_HPP