Enforce style convention to apply and forEach functions and add recursive implementations

amdis/common/Apply.hpp

@@ -10,19 +10,19 @@
 
 namespace AMDiS
 {
-  namespace Tools
+  namespace Ranges
   {
     namespace Impl_
     {
       template <class Functor, class Tuple, std::size_t... I>
-      constexpr decltype(auto) apply_impl(Functor&& f, Tuple&& t, std::index_sequence<I...>)
+      constexpr decltype(auto) applyImpl(Functor&& f, Tuple&& t, std::index_sequence<I...>)
       {
         using std::get;
         return f(get<I>(FWD(t))...);
       }
 
       template <class Functor, std::size_t I0, std::size_t... I>
-      constexpr decltype(auto) apply_indices_impl(Functor&& f, index_t<I0>, std::index_sequence<I...>)
+      constexpr decltype(auto) applyIndicesImpl(Functor&& f, index_t<I0>, std::index_sequence<I...>)
       {
         return f(index_t<I0+I>{}...);
       }
@@ -31,35 +31,44 @@ namespace AMDiS
     template <class F, class Tuple>
     constexpr decltype(auto) apply(F&& f, Tuple&& t)
     {
-      return Impl_::apply_impl(FWD(f), FWD(t),
+      return Impl_::applyImpl(FWD(f), FWD(t),
           std::make_index_sequence<static_size_v<Tuple>>{});
     }
 
     template <class Functor, class... Args>
-    constexpr decltype(auto) apply_variadic(Functor&& f, Args&&... args)
+    constexpr decltype(auto) applyVariadic(Functor&& f, Args&&... args)
     {
-      return apply(FWD(f), std::forward_as_tuple(args...));
+      return Impl_::applyImpl(FWD(f), std::forward_as_tuple(args...),
+          std::make_index_sequence<sizeof...(Args)>{});
     }
 
     template <std::size_t N, class Functor>
-    constexpr decltype(auto) apply_indices(Functor&& f)
+    constexpr decltype(auto) applyIndices(Functor&& f)
     {
-      return Impl_::apply_indices_impl(FWD(f), index_t<0>{},
+      return Impl_::applyIndicesImpl(FWD(f), index_t<0>{},
           std::make_index_sequence<N>{});
     }
 
+    template <std::size_t I0, std::size_t I1, class Functor>
+    constexpr decltype(auto) applyIndices(Functor&& f)
+    {
+      return Impl_::applyIndicesImpl(FWD(f), index_t<I0>{},
+          std::make_index_sequence<I1-I0>{});
+    }
+
     template <class Functor, std::size_t N>
-    constexpr decltype(auto) apply_indices(Functor&& f, index_t<N>)
+    constexpr decltype(auto) applyIndices(Functor&& f, index_t<N>)
     {
-      return Impl_::apply_indices_impl(FWD(f), index_t<0>{},
+      return Impl_::applyIndicesImpl(FWD(f), index_t<0>{},
           std::make_index_sequence<N>{});
     }
 
     template <class Functor, std::size_t I0, std::size_t I1>
-    constexpr decltype(auto) apply_indices(Functor&& f, index_t<I0>, index_t<I1>)
+    constexpr decltype(auto) applyIndices(Functor&& f, index_t<I0>, index_t<I1>)
     {
-      return Impl_::apply_indices_impl(FWD(f), index_t<I0>{},
+      return Impl_::applyIndicesImpl(FWD(f), index_t<I0>{},
           std::make_index_sequence<I1-I0>{});
     }
-  }
+
+  } // end namespace Ranges
 } // end namespace AMDiS

amdis/common/CMakeLists.txt

@@ -24,6 +24,8 @@ install(FILES
     Math.hpp
     Order.hpp
     Range.hpp
+    RecursiveApply.hpp
+    RecursiveForEach.hpp
     QuadMath.hpp
     SharedPtr.hpp
     StaticSize.hpp

amdis/common/ForEach.hpp

@@ -7,36 +7,36 @@
 
 namespace AMDiS
 {
-  namespace Tools
+  namespace Ranges
   {
     template <class Functor, class... Args>
-    constexpr void for_variadic(Functor&& f, Args&&... args)
+    constexpr void forVariadic(Functor&& f, Args&&... args)
     {
       (f(FWD(args)),...);
     }
 
     template <std::size_t... I, class Tuple, class Functor>
-    constexpr void for_each(std::index_sequence<I...>, Tuple&& tuple, Functor&& f)
+    constexpr void forEach(std::index_sequence<I...>, Tuple&& tuple, Functor&& f)
     {
       using std::get;
       (f(get<I>(tuple)),...);
     }
 
     template <class Tuple, class Functor>
-    constexpr void for_each(Tuple&& tuple, Functor&& f)
+    constexpr void forEach(Tuple&& tuple, Functor&& f)
     {
-      Tools::for_each(std::make_index_sequence<static_size_v<Tuple>>{}, FWD(tuple), FWD(f));
+      Ranges::forEach(std::make_index_sequence<static_size_v<Tuple>>{}, FWD(tuple), FWD(f));
     }
 
     template <class T, std::size_t n, class Functor>
-    constexpr void for_each(std::array<T,n> const& a, Functor&& f)
+    constexpr void forEach(std::array<T,n> const& a, Functor&& f)
     {
       for (auto const& ai : a)
         f(ai);
     }
 
     template <class T, class Functor>
-    constexpr void for_each(std::vector<T> const& v, Functor&& f)
+    constexpr void forEach(std::vector<T> const& v, Functor&& f)
     {
       for (auto const& vi : v)
         f(vi);
@@ -44,28 +44,34 @@ namespace AMDiS
 
 
     template <std::size_t I0 = 0, std::size_t... I, class Functor>
-    constexpr void for_range(std::index_sequence<I...>, Functor&& f)
+    constexpr void forIndices(std::index_sequence<I...>, Functor&& f)
     {
       (f(index_t<I0+I>{}),...);
     }
 
     template <std::size_t I0, std::size_t I1, class Functor>
-    constexpr void for_range(index_t<I0>, index_t<I1>, Functor&& f)
+    constexpr void forIndices(index_t<I0>, index_t<I1>, Functor&& f)
     {
-      Tools::for_range<I0>(std::make_index_sequence<std::size_t(I1-I0)>{}, FWD(f));
+      Ranges::forIndices<I0>(std::make_index_sequence<std::size_t(I1-I0)>{}, FWD(f));
     }
 
     template <std::size_t N, class Functor>
-    constexpr void for_range(index_t<N>, Functor&& f)
+    constexpr void forIndices(index_t<N>, Functor&& f)
     {
-      Tools::for_range(std::make_index_sequence<N>{}, FWD(f));
+      Ranges::forIndices(std::make_index_sequence<N>{}, FWD(f));
     }
 
     template <std::size_t I0, std::size_t I1, class Functor>
-    constexpr void for_range(Functor&& f)
+    constexpr void forIndices(Functor&& f)
     {
-      Tools::for_range<I0>(std::make_index_sequence<std::size_t(I1-I0)>{}, FWD(f));
+      Ranges::forIndices<I0>(std::make_index_sequence<std::size_t(I1-I0)>{}, FWD(f));
     }
 
-  } // end namespace Tools
+    template <std::size_t N, class Functor>
+    constexpr void forIndices(Functor&& f)
+    {
+      Ranges::forIndices<0>(std::make_index_sequence<N>{}, FWD(f));
+    }
+
+  } // end namespace Ranges
 } // end namespace AMDiS

amdis/common/RecursiveApply.hpp

+#pragma once
+
+#include <array>
+#include <tuple>
+#include <vector>
+
+#include <dune/common/tuplevector.hh>
+#include <amdis/common/Apply.hpp>
+
+namespace AMDiS
+{
+  namespace Recursive
+  {
+    /// Default implementation of the recursive \ref map function.
+    template <class T>
+    struct Apply
+    {
+      template <class F>
+      static auto impl(F&& f, T const& t)
+      {
+        return f(t);
+      }
+    };
+
+    /// \brief Recursive application of a transformation functor `f` to a hierarchic
+    /// container of containers, returning the transformed container.
+    /**
+     * This utility function applies the given functor `f` to the "leaf" entries in
+     * a hierarchic container that returns a transformed container. Therefore, the
+     * container is traversed recursively, using specializations of the `Map<Container>::apply`
+     * class method. If no specialization is provided, the function is applied to the
+     * whole container or leaf entry, respectively.
+     **/
+    template <class F, class T>
+    auto apply(F&& f, T const& t)
+    {
+      return Apply<T>::impl(f,t);
+    }
+
+
+    // specializations for container types
+
+    template <class T, std::size_t n>
+    struct Apply<std::array<T,n>>
+    {
+      template <class F>
+      static auto impl(F&& f, std::array<T,n> const& a)
+      {
+        return Ranges::applyIndices<n>([&](auto... ii) {
+          return std::array{Recursive::apply(f,a[ii])...}; });
+      }
+    };
+
+    template <class... TT>
+    struct Apply<std::tuple<TT...>>
+    {
+      template <class F>
+      static auto impl(F&& f, std::tuple<TT...> const& t)
+      {
+        return Ranges::apply([&](auto const&... ti) {
+          return std::tuple{Recursive::apply(f,ti)...}; }, t);
+      }
+    };
+
+    template <class T1, class T2>
+    struct Apply<std::pair<T1,T2>>
+    {
+      template <class F>
+      static auto impl(F&& f, std::pair<T1,T2> const& t)
+      {
+        return std::pair{Recursive::apply(f,t.first),
+                         Recursive::apply(f,t.second)};
+      }
+    };
+
+    template <class... TT>
+    struct Apply<Dune::TupleVector<TT...>>
+    {
+      template <class F>
+      static auto impl(F&& f, Dune::TupleVector<TT...> const& t)
+      {
+        return Ranges::apply([&](auto const&... ti) {
+          return Dune::makeTupleVector(Recursive::apply(f,ti)...); }, t);
+      }
+    };
+
+    template <class T>
+    struct Apply<std::vector<T>>
+    {
+      template <class F>
+      static auto impl(F&& f, std::vector<T> const& v)
+      {
+        using U = TYPEOF(Recursive::apply(f,std::declval<T>()));
+        std::vector<U> out;
+        out.reserve(v.size());
+        for (std::size_t i = 0; i < v.size(); ++i)
+          out.emplace_back(Recursive::apply(f,v[i]));
+        return out;
+      }
+    };
+
+  } // end namespace Recursive
+} // end namespace AMDiS
\ No newline at end of file

amdis/common/RecursiveForEach.hpp

+#pragma once
+
+#include <array>
+#include <tuple>
+#include <vector>
+#include <type_traits>
+#include <utility>
+
+#include <dune/common/tuplevector.hh>
+#include <amdis/common/TypeTraits.hpp>
+
+namespace AMDiS
+{
+  namespace Recursive
+  {
+    /// Default implementation of the recursive \ref forEach function.
+    /**
+     * \tparam V  The type of the container/value decayed to the raw type
+     **/
+    template <class V>
+    struct ForEach
+    {
+      template <class Value, class F>
+      static void impl(Value&& v, F&& f)
+      {
+        f(v);
+      }
+    };
+
+    /// \brief Recursive application of a functor `f` to a hierarchic container of containers.
+    /**
+     * This utility function applies the given functor `f` to the "leaf" entries in
+     * a hierarchic container. Therefore, the container is traversed recursively,
+     * using specializations of the `ForEach<Container>::apply` class method.
+     * If no specialization is provided, the function is applied to the whole container
+     * or leaf entry, respectively.
+     **/
+    template <class Container, class F>
+    void forEach(Container&& container, F&& f)
+    {
+      ForEach<TYPEOF(container)>::impl(container,f);
+    }
+
+
+    // specializations for container types
+
+    template <class... TT>
+    struct ForEach<std::tuple<TT...>>
+    {
+      using indices = std::make_index_sequence<sizeof...(TT)>;
+
+      template <std::size_t... I, class Tuple, class F>
+      static void impl2(std::index_sequence<I...>, Tuple&& tuple, F&& f)
+      {
+        using std::get;
+        (Recursive::forEach(get<I>(tuple), f),...);
+      }
+
+      template <class Tuple, class F>
+      static void impl(Tuple&& tuple, F&& f)
+      {
+        impl2(indices{}, tuple, f);
+      }
+    };
+
+    template <class T1, class T2>
+    struct ForEach<std::pair<T1,T2>>
+    {
+      template <class Pair, class F>
+      static void impl(Pair&& pair, F&& f)
+      {
+        Recursive::forEach(pair.first, f);
+        Recursive::forEach(pair.second, f);
+      }
+    };
+
+    template <class... TT>
+    struct ForEach<Dune::TupleVector<TT...>>
+    {
+      template <class Tuple, class F>
+      static void impl(Tuple&& tuple, F&& f)
+      {
+        ForEach<std::tuple<TT...>>::impl(tuple, f);
+      }
+    };
+
+    template <class T, std::size_t n>
+    struct ForEach<std::array<T,n>>
+    {
+      template <class Array, class F>
+      static void impl(Array&& a, F&& f)
+      {
+        for (auto&& ai : a)
+          Recursive::forEach(ai, f);
+      }
+    };
+
+    template <class T>
+    struct ForEach<std::vector<T>>
+    {
+      template <class Vector, class F>
+      static void impl(Vector&& v, F&& f)
+      {
+        for (auto&& vi : v)
+          Recursive::forEach(vi, f);
+      }
+    };
+
+  } // end namespace Recursive
+} // end namespace AMDiS

amdis/functions/GlobalIdSet.hpp

@@ -370,7 +370,7 @@ namespace AMDiS
 
   public:
     NodeIdSet(GridView const& gridView)
-      : idsTuple_(Tools::apply_indices<children>([&](auto... i) {
+      : idsTuple_(Ranges::applyIndices<children>([&](auto... i) {
           return std::make_tuple(SubNodeIdSet<VALUE(i)>(gridView)...);
           }))
     {}
@@ -379,7 +379,7 @@ namespace AMDiS
     void bind(const Node& node)
     {
       node_ = &node;
-      Tools::for_range<0,children>([&](auto i) {
+      Ranges::forIndices<0,children>([&](auto i) {
         std::get<VALUE(i)>(idsTuple_).bind(node.child(i));
       });
     }
@@ -388,7 +388,7 @@ namespace AMDiS
     void unbind()
     {
       node_ = nullptr;
-      Tools::for_each(idsTuple_, [](auto& ids) {
+      Ranges::forEach(idsTuple_, [](auto& ids) {
         ids.unbind();
       });
     }
@@ -404,7 +404,7 @@ namespace AMDiS
     It fillIn(Twist const& twist, It it, size_type shift = 0) const
     {
       assert(node_ != nullptr);
-      Tools::for_each(idsTuple_, [&](auto const& ids)
+      Ranges::forEach(idsTuple_, [&](auto const& ids)
       {
         size_type subTreeSize = ids.size();
         it = ids.fillIn(twist, it, shift);

amdis/functions/HierarchicNodeToRangeMap.hpp

@@ -51,7 +51,7 @@ namespace AMDiS
     template <class TreePath>
     static auto transformTreePath(TreePath const& treePath)
     {
-      return Tools::apply([](auto... i) { return Dune::makeTupleVector(i...); }, treePath._data);
+      return Ranges::apply([](auto... i) { return Dune::makeTupleVector(i...); }, treePath._data);
     }
 #endif
   };

amdis/functions/Order.hpp

@@ -16,7 +16,7 @@ namespace AMDiS
     else if constexpr (N::isPower)
       return order(node.child(0u));
     else if constexpr (N::isComposite)
-      return Tools::apply_indices<N::degree()>([&](auto... ii) {
+      return Ranges::applyIndices<N::degree()>([&](auto... ii) {
         return Math::max(order(node.child(ii))...);
       });
     else {

amdis/gridfunctions/FunctorGridFunction.hpp

@@ -72,7 +72,7 @@ namespace AMDiS
     template <class Element>
     void bind(Element const& element)
     {
-      Tools::for_each(localFcts_, [&](auto& localFct) {
+      Ranges::forEach(localFcts_, [&](auto& localFct) {
         (*localFct).bind(element);
       });
     }
@@ -80,7 +80,7 @@ namespace AMDiS
     /// Calls \ref unbind for all localFunctions
     void unbind()
     {
-      Tools::for_each(localFcts_, [&](auto& localFct) {
+      Ranges::forEach(localFcts_, [&](auto& localFct) {
         (*localFct).unbind();
       });
     }
@@ -88,7 +88,7 @@ namespace AMDiS
     /// Applies the functor \ref fct_ to the evaluated localFunctions
     Range operator()(Domain const& x) const
     {
-      return Tools::apply([&](auto&&... localFct) { return fct_((*localFct)(x)...); }, localFcts_);
+      return Ranges::apply([&](auto&&... localFct) { return fct_((*localFct)(x)...); }, localFcts_);
     }
 
   public:
@@ -127,7 +127,7 @@ namespace AMDiS
     // d_i(f)[lgfs...] * lgfs_i
     auto term_i = [&](auto const _i)
     {
-      auto di_f = Tools::apply([&](auto const&... lgfs) {
+      auto di_f = Ranges::apply([&](auto const&... lgfs) {
         return makeFunctorGridFunction(partial(lf.fct(), _i), (*lgfs)...);
       }, lf.localFcts());
 
@@ -137,7 +137,7 @@ namespace AMDiS
     };