added ctors and constexpr to CompileOptional

include/CompileOptional.h

@@ -6,24 +6,39 @@
 #define CONST_CONTAINER_COMPILEOPTIONAL_H_
 
 #include <type_traits>
+#include <initializer_list>
 
 namespace cc {
-	template<typename, bool Cond = false>
+	template<typename T, bool Cond = false>
 	class CompileOptional {};
 	
 	template<typename T>
 	class CompileOptional<T, false> {
 		public:
 			using defined = std::false_type;
+			using value_type = T;
+			
+			constexpr CompileOptional() = default;
+			constexpr CompileOptional(const value_type& value) {}
+			template<typename ...Args>
+			constexpr CompileOptional(Args... args) {}
 	};
 
 	template<typename T>
 	class CompileOptional<T, true> {
 		public:
 			using defined = std::true_type;
-			operator T&() { return _data; }
+			using value_type = T;
+			
+			constexpr CompileOptional() = default;
+			constexpr CompileOptional(const value_type& value) : _value(value) {}
+			constexpr CompileOptional(value_type&& value) : _value(value) {}
+			template<typename ...Args>
+			constexpr CompileOptional(Args... args) : _value( { std::forward<Args>(args)... } ) {}
+			 
+			constexpr operator T&() { return _value; }
 		private:
-			T _data;
+			T _value;
 	};
 	
 }