TMP Random Access Container

tmp_random_access_expt.cpp

#define STATIC_ASSERT(expr) { char assertion_stage[((expr) ? 0:-1)]; }

#define RANDOM_ACCESS_CONTAINER_META(KEY_TYPE, val_type, name) \
	template<KEY_TYPE KEY> \
	struct meta_container_##name##_{ \
		typedef val_type value_type; \
		typedef KEY_TYPE key_type; \
		static const value_type value = static_cast<value_type>(0); \
	}; \
	typedef KEY_TYPE meta_container_##name##_key_type_; \
	typedef val_type meta_container_##name##_val_type_;

#define RANDOM_ACCESS_INSERT(name, key, val) \
	template<> struct meta_container_##name##_<key>{ \
		typedef meta_container_##name##_val_type_ value_type; \
		typedef meta_container_##name##_key_type_ key_type; \
		static const value_type value = val; \
	};

#define RANDOM_ACCESS_GET(name, key) meta_container_##name##_<key>::value

RANDOM_ACCESS_CONTAINER_META(int, int, TMP_INT_MAP);

RANDOM_ACCESS_INSERT(TMP_INT_MAP, 5, 15);
RANDOM_ACCESS_INSERT(TMP_INT_MAP, 6, 18);
RANDOM_ACCESS_INSERT(TMP_INT_MAP, 7, 21);


int main(){

	STATIC_ASSERT ( RANDOM_ACCESS_GET(TMP_INT_MAP, 5) == 15 );
	STATIC_ASSERT ( RANDOM_ACCESS_GET(TMP_INT_MAP, 6) == 18 );
	STATIC_ASSERT ( RANDOM_ACCESS_GET(TMP_INT_MAP, 7) == 21 );
	STATIC_ASSERT ( RANDOM_ACCESS_GET(TMP_INT_MAP, 1) == 0 );

	return 0;
}