adding fusion docs and tests

[SVN r34920]
2006-08-22 15:57:13 +00:00
parent 75b9d13a88
commit c31253d8c1
351 changed files with 42280 additions and 0 deletions
--- a/test/algorithm/fold.cpp
+++ b/test/algorithm/fold.cpp
@ -0,0 +1,110 @@
+/*=============================================================================
+    Copyright (c) 2001-2006 Joel de Guzman
+
+    Use, modification and distribution is subject to 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)
+==============================================================================*/
+#include <boost/detail/lightweight_test.hpp>
+#include <boost/fusion/sequence/container/vector/vector.hpp>
+#include <boost/fusion/sequence/adapted/mpl.hpp>
+#include <boost/fusion/sequence/io/out.hpp>
+#include <boost/fusion/sequence/intrinsic/at.hpp>
+#include <boost/fusion/algorithm/iteration/fold.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/next.hpp>
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/vector.hpp>
+
+using boost::mpl::if_;
+using boost::mpl::int_;
+using boost::is_same;
+
+struct add_ints_only
+{
+    template <typename T, typename State>
+    struct result
+    {
+        typedef State type;
+    };
+
+    template <typename T, typename State>
+    State const&
+    operator()(T const& x, State const& state) const
+    {
+        return state;
+    }
+
+    int
+    operator()(int x, int state) const
+    {
+        return x + state;
+    }
+};
+
+struct count_ints
+{
+    template <typename T, typename CountT>
+    struct result
+    {
+        typedef typename
+            if_<
+                is_same<T, int>
+              , typename boost::mpl::next<CountT>::type
+              , CountT
+            >::type
+        type;
+    };
+
+    template <typename T, typename CountT>
+    typename result<T, CountT>::type
+    operator()(T const&, CountT const&) const
+    {
+        typedef typename result<T, CountT>::type result;
+        return result();
+    }
+};
+
+int
+main()
+{
+    using namespace boost::fusion;
+    namespace fusion = boost::fusion;
+
+    {
+        typedef vector<int, char, int, double> vector_type;
+        vector_type v(12345, 'x', 678910, 3.36);
+        int result = fold(v, 0, add_ints_only());
+        std::cout << result << std::endl;
+        BOOST_TEST(result == 12345+678910);
+    }
+
+    {
+        typedef vector<int> vector_type;
+        vector_type v(12345);
+
+        int n = fusion::fold(v, int_<0>(), count_ints());
+        std::cout << n << std::endl;
+        BOOST_TEST(n == 1);
+    }
+
+    {
+        typedef vector<int, char, int, double, int> vector_type;
+        vector_type v(12345, 'x', 678910, 3.36, 8756);
+
+        int n = fusion::fold(v, int_<0>(), count_ints());
+        std::cout << n << std::endl;
+        BOOST_TEST(n == 3);
+    }
+
+    {
+        typedef boost::mpl::vector<int, char, int, double, int> mpl_vec;
+        int n = fusion::fold(mpl_vec(), int_<0>(), count_ints());
+        std::cout << n << std::endl;
+        BOOST_TEST(n == 3);
+    }
+
+    return boost::report_errors();
+}
+