pos_type: more constexpr

src/include/xpr/pos_type.cc.h

@@ -288,7 +288,8 @@ namespace CNORXZ
     	static constexpr decltype(auto) mks(const PosT& pos, std::index_sequence<Is...> is)
 	{
 	    if constexpr(is_static_pos_type<PosT>::value){
-		return SFPos<pos.val(),Is...> {};
+		constexpr PosT posx;
+		return SFPos<posx.val(),Is...> {};
 	    }
 	    else {
 		return mk(pos, &SFPos<0,Is...>::permutation[0]);
@@ -838,12 +839,21 @@ namespace CNORXZ
 	return std::get<I>(mP);
     }
 
+    template <class BPosT, class... OPosTs>
+    template <SizeT I>
+    constexpr decltype(auto) EPos<BPosT,OPosTs...>::constexprget(CSizeT<I> i) const
+    {
+	constexpr decltype(std::get<I>(mP).val()) x;
+	return x;
+    }
+
     template <class BPosT, class... OPosTs>
     template <SizeT... Is>
     constexpr decltype(auto) EPos<BPosT,OPosTs...>::ival(std::index_sequence<Is...> is) const
     {
 	if constexpr(is_static_pos_type<EPos<BPosT,OPosTs...>>::value){
-	    return std::index_sequence<std::get<Is>(mP).val()...>{};
+	    //return std::index_sequence<std::get<Is>(mP).val()...>{};
+	    return std::index_sequence<constexprget(CSizeT<Is>{})...>{};
 	}
 	else {
 	    return Arr<SizeT,is.size()> { (BPosT::val()+std::get<Is>(mP).val())... };

src/include/xpr/pos_type.h

@@ -286,6 +286,9 @@ namespace CNORXZ
     private:
 	Tuple<OPosTs...> mP;
 
+	template <SizeT I>
+	constexpr decltype(auto) constexprget(CSizeT<I> i) const;
+	
 	template <SizeT... Is>
 	constexpr decltype(auto) ival(std::index_sequence<Is...> is) const;