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Here are some small things you could di in order to improve your design: First of all, you have a typo: you wrote Map::Iiterator begin(); instead of Map::Iterator begin();. You use KeyType and DataT …

Since you have access to a C++11 compiler, you should use the standard type trait std::is_enum in the default version of your template instead of just writing is_enum = false. … Also, it should be constexpr: template<typename T> struct enum_properties { static constexpr bool is_enum = std::is_enum<T>::value; // ... }; Now, you don't have any mean to know whether T is …

Using it should allow you to always be safe but also to be safe when possible: template < typename Tp, int M, int N> void zero( cv::Matx<Tp, M, N>& m ) { std::fill(std::begin(m.val), std::end(m.val) … If you don't use a C++11 standard library, you can implement it as follows instead: template < typename Tp, int M, int N> void zero( cv::Matx<Tp, M, N>& m ) { std::fill(m.val, m.val + M*N, 0); } For …

Step, bool IsIncreasing > struct integer_range_impl; template< typename Integer, Integer... … <std::size_t, Begin, End, Step>; Here is an example of how this template integer range can be used: #include <array> #include <iostream> #include <iterator> #include <numeric> template<typename T, …

I was writing some geometry-related code again and had a closer look at my function supposed to compute the Euclidean distance between two points (N-dimensional points by the way, hence the N template … Here is a simplified version: template<std::size_t N, typename T> auto distance(const Point<N, T>& lhs, const Point<N, T>& rhs) -> T { T res{}; for (std::size_t i = 0 ; i < N ; ++i) { …

arguments whose types have been deduced, I would have passed args by universal reference (now officially called forwarding reference) and used std::forward to forward the results to the following functions: template … and quite long to explain how it works exactly - you can find a great explanation in the answer linked above -, but the main point is that using this particular recipe implements perfect forwarding: template …

Therefore, you function declaration should be along these lines: template< typename T, typename InputIt, typename OutputIt, typename Distance, typename Compare = typename Comp<T, Distance … :size_t n, Distance dist, Compare comp = Compare()); That said, the standard library algorithms also tend to return the first iterator of the output range, so the declaration would become: template …

In other words, make DenseBase take a Derived template parameter which corresponds to the type of the derived class: template <typename T, std::size_t M, std::size_t N, typename Derived> class DenseBase … { // ... } Then make the derived classes feed their own type to this template parameter: template <typename Parent, typename T, std::size_t N> class Rowview : public DenseBase<T, 1, N, Rowview< …

instead if not providing the body triggers some warnings so that you don't have to repeat the return type: static constexpr auto check(T *) -> typename std::is_same<decltype(std::declval<caller>().template …

The intersect function First of all, I do believe that intersect should only be a free function that takes any number of mathematical objects and returns whether these objects intersect at some point …

>::type; Here is the template utility I wrote to detect whether a template has a specialization for a given type, for SFINAE purpose: template< template<typename...> class, typename, typename … =void > struct is_specialized: std::false_type {}; template< template<typename...> class Template, typename T > struct is_specialized<Template, T, std::void_t<decltype(Template<T>{})>>: …

The code is rather tiny so there isn't much to say, but I still have a couple of remarks: Since you're using C++17, you can take advantage of variable templates to simplify your static assertions a …

(Args); typedef std::tuple<std::decay_t<Args>...> AllArgs; }; template<typename StreamValueGetter, typename Action, typename Stream, std::size_t... … action(StreamValueGetter::template get<std::tuple_element_t<S, ArgumentTuple>>(stream)...); } template<typename StreamValueGetter, typename Action, typename Stream> void callFunctor(Stream& stream, Action …

struct decreasing_integer_range; template<typename Int, Int... … static_assert(N == 2, ""); } template<std::size_t N> void test(std::integer_sequence<int, -3, -2, -1, 0, 1>) { static_assert(N == 3, ""); } template<std::size_t N> void test(std::integer_sequence …

For example, you could turn this piece of code: template<typename T, typename S, typename ...Args> void apply(T *t, const S & setter, const Args &... args) { t->set(setter); apply(t, args...); } … into this one: template<typename T, typename S, typename ...Args> void apply(T *t, const S & setter, Args &&... args) { t->set(setter); apply(t, std::forward<Args>(args)...); } std::unique_ptr …