comparison DEPENDENCIES/generic/include/boost/units/detail/heterogeneous_conversion.hpp @ 16:2665513ce2d3

Add boost headers

+// Boost.Units - A C++ library for zero-overhead dimensional analysis and 
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UNITS_DETAIL_HETEROGENEOUS_CONVERSION_HPP
+#define BOOST_UNITS_DETAIL_HETEROGENEOUS_CONVERSION_HPP
+
+#include <boost/mpl/minus.hpp>
+#include <boost/mpl/times.hpp>
+
+#include <boost/units/static_rational.hpp>
+#include <boost/units/homogeneous_system.hpp>
+#include <boost/units/detail/linear_algebra.hpp>
+
+namespace boost {
+
+namespace units {
+
+namespace detail {
+
+struct solve_end {
+    template<class Begin, class Y>
+    struct apply {
+        typedef dimensionless_type type;
+    };
+};
+
+struct no_solution {};
+
+template<class X1, class X2, class Next>
+struct solve_normal {
+    template<class Begin, class Y>
+    struct apply {
+        typedef typename Begin::next next;
+        typedef list<
+            typename mpl::minus<
+                typename mpl::times<X1, Y>::type,
+                typename mpl::times<X2, typename Begin::item>::type
+            >::type,
+            typename Next::template apply<next, Y>::type
+        > type;
+    };
+};
+
+template<class Next>
+struct solve_leading_zeroes {
+    template<class Begin>
+    struct apply {
+        typedef list<
+            typename Begin::item,
+            typename Next::template apply<typename Begin::next>::type
+        > type;
+    };
+    typedef solve_leading_zeroes type;
+};
+
+template<>
+struct solve_leading_zeroes<no_solution> {
+    typedef no_solution type;
+};
+
+template<class Next>
+struct solve_first_non_zero {
+    template<class Begin>
+    struct apply {
+        typedef typename Next::template apply<
+            typename Begin::next,
+            typename Begin::item
+        >::type type;
+    };
+};
+
+template<class Next>
+struct solve_internal_zero {
+    template<class Begin, class Y>
+    struct apply {
+        typedef list<
+            typename Begin::item,
+            typename Next::template apply<typename Begin::next, Y>::type
+        > type;
+    };
+};
+
+template<class T>
+struct make_solve_list_internal_zero {
+    template<class Next, class X>
+    struct apply {
+        typedef solve_normal<T, X, Next> type;
+    };
+};
+
+template<>
+struct make_solve_list_internal_zero<static_rational<0> > {
+    template<class Next, class X>
+    struct apply {
+        typedef solve_internal_zero<Next> type;
+    };
+};
+
+template<int N>
+struct make_solve_list_normal {
+    template<class Begin, class X>
+    struct apply {
+        typedef typename make_solve_list_internal_zero<
+            typename Begin::item
+        >::template apply<
+            typename make_solve_list_normal<N-1>::template apply<typename Begin::next, X>::type,
+            X
+        >::type type;
+    };
+};
+
+template<>
+struct make_solve_list_normal<0> {
+    template<class Begin, class X>
+    struct apply {
+        typedef solve_end type;
+    };
+};
+
+template<int N>
+struct make_solve_list_leading_zeroes;
+
+template<class T>
+struct make_solve_list_first_non_zero {
+    template<class Begin, int N>
+    struct apply {
+        typedef solve_first_non_zero<
+            typename make_solve_list_normal<N-1>::template apply<
+                typename Begin::next,
+                typename Begin::item
+            >::type
+        > type;
+    };
+};
+
+template<>
+struct make_solve_list_first_non_zero<static_rational<0> > {
+    template<class Begin, int N>
+    struct apply {
+        typedef typename solve_leading_zeroes<
+            typename make_solve_list_leading_zeroes<N-1>::template apply<
+                typename Begin::next
+            >::type
+        >::type type;
+    };
+};
+
+template<int N>
+struct make_solve_list_leading_zeroes {
+    template<class Begin>
+    struct apply {
+        typedef typename make_solve_list_first_non_zero<typename Begin::item>::template apply<Begin, N>::type type;
+    };
+};
+
+template<>
+struct make_solve_list_leading_zeroes<0> {
+    template<class Begin>
+    struct apply {
+        typedef no_solution type;
+    };
+};
+
+template<int N>
+struct try_add_unit_impl {
+    template<class Begin, class L>
+    struct apply {
+        typedef typename try_add_unit_impl<N-1>::template apply<typename Begin::next, L>::type next;
+        typedef typename Begin::item::template apply<next>::type type;
+        BOOST_STATIC_ASSERT((next::size::value - 1 == type::size::value));
+    };
+};
+
+template<>
+struct try_add_unit_impl<0> {
+    template<class Begin, class L>
+    struct apply {
+        typedef L type;
+    };
+};
+
+template<int N>
+struct make_homogeneous_system_impl;
+
+template<class T, bool is_done>
+struct make_homogeneous_system_func;
+
+template<class T>
+struct make_homogeneous_system_func<T, false> {
+    template<class Begin, class Current, class Units, class Dimensions, int N>
+    struct apply {
+        typedef typename make_homogeneous_system_impl<N-1>::template apply<
+            typename Begin::next,
+            list<T, Current>,
+            list<typename Begin::item, Units>,
+            Dimensions
+        >::type type;
+    };
+};
+
+template<class T>
+struct make_homogeneous_system_func<T, true> {
+    template<class Begin, class Current, class Units, class Dimensions, int N>
+    struct apply {
+        typedef list<typename Begin::item, Units> type;
+    };
+};
+
+template<>
+struct make_homogeneous_system_func<no_solution, false> {
+    template<class Begin, class Current, class Units, class Dimensions, int N>
+    struct apply {
+        typedef typename make_homogeneous_system_impl<N-1>::template apply<
+            typename Begin::next,
+            Current,
+            Units,
+            Dimensions
+        >::type type;
+    };
+};
+
+template<>
+struct make_homogeneous_system_func<no_solution, true> {
+    template<class Begin, class Current, class Units, class Dimensions, int N>
+    struct apply {
+        typedef typename make_homogeneous_system_impl<N-1>::template apply<
+            typename Begin::next,
+            Current,
+            Units,
+            Dimensions
+        >::type type;
+    };
+};
+
+template<int N>
+struct make_homogeneous_system_impl {
+    template<class Begin, class Current, class Units, class Dimensions>
+    struct apply {
+        typedef typename expand_dimensions<Dimensions::size::value>::template apply<
+            Dimensions,
+            typename Begin::item::dimension_type
+        >::type dimensions;
+        typedef typename try_add_unit_impl<Current::size::value>::template apply<Current, dimensions>::type new_element;
+        typedef typename make_solve_list_leading_zeroes<new_element::size::value>::template apply<new_element>::type new_func;
+        typedef typename make_homogeneous_system_func<
+            new_func,
+            ((Current::size::value)+1) == (Dimensions::size::value)
+        >::template apply<Begin, Current, Units, Dimensions, N>::type type;
+    };
+};
+
+template<>
+struct make_homogeneous_system_impl<0> {
+    template<class Begin, class Current, class Units, class Dimensions>
+    struct apply {
+        typedef Units type;
+    };
+};
+
+template<class Units>
+struct make_homogeneous_system {
+    typedef typename find_base_dimensions<Units>::type base_dimensions;
+    typedef homogeneous_system<
+        typename insertion_sort<
+            typename make_homogeneous_system_impl<
+                Units::size::value
+            >::template apply<
+                Units,
+                dimensionless_type,
+                dimensionless_type,
+                base_dimensions
+            >::type
+        >::type
+    > type;
+};
+
+template<int N>
+struct extract_base_units {
+    template<class Begin, class T>
+    struct apply {
+        typedef list<
+            typename Begin::item::tag_type,
+            typename extract_base_units<N-1>::template apply<typename Begin::next, T>::type
+        > type;
+    };
+};
+
+template<>
+struct extract_base_units<0> {
+    template<class Begin, class T>
+    struct apply {
+        typedef T type;
+    };
+};
+
+}
+
+}
+
+}
+
+#endif