Moved minimum_category to the public namespace. Added tests.

test/Jamfile.v2

@@ -3,28 +3,28 @@
 # file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
 test-suite iterator
-  : 
+  :
     # These first two tests will run last, and are expected to fail
     # for many less-capable compilers.
-  
+
     [ compile-fail interoperable_fail.cpp ]
     # test uses expected success, so that we catch unrelated
     # compilation problems.
-    [ run is_convertible_fail.cpp ]  
+    [ run is_convertible_fail.cpp ]
 
     [ run zip_iterator_test.cpp
-        : : : 
-        
+        : : :
+
         # stlport's debug mode generates long symbols which overwhelm
         # vc6
-        #<msvc-stlport><*><runtime-build>release 
+        #<msvc-stlport><*><runtime-build>release
     ]
-      
+
     # These tests should work for just about everything.
     [ compile is_lvalue_iterator.cpp ]
     [ compile is_readable_iterator.cpp ]
     [ compile pointee.cpp ]
-      
+
     [ run unit_tests.cpp ]
     [ run concept_tests.cpp ]
     [ run iterator_adaptor_cc.cpp ]
@@ -41,9 +41,12 @@ test-suite iterator
     [ run counting_iterator_test.cpp ]
     [ run interoperable.cpp ]
     [ run iterator_traits_test.cpp ]
-    [ run permutation_iterator_test.cpp : : : # <stlport-iostream>on 
+    [ run permutation_iterator_test.cpp : : : # <stlport-iostream>on
     ]
     [ run function_input_iterator_test.cpp ]
-      
+
     [ run generator_iterator_test.cpp ]
+
+    [ run minimum_category.cpp ]
+    [ compile-fail minimum_category_compile_fail.cpp ]
 ;

test/minimum_category.cpp

@@ -0,0 +1,22 @@
+// Copyright Andrey Semashev 2014.
+//
+// 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/iterator/minimum_category.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <iterator>
+
+using boost::is_same;
+using boost::iterators::minimum_category;
+
+int main(int, char*[])
+{
+    BOOST_TEST_TRAIT_TRUE((is_same<minimum_category<std::forward_iterator_tag, std::random_access_iterator_tag>::type, std::forward_iterator_tag>));
+    BOOST_TEST_TRAIT_TRUE((is_same<minimum_category<std::random_access_iterator_tag, std::forward_iterator_tag>::type, std::forward_iterator_tag>));
+    BOOST_TEST_TRAIT_TRUE((is_same<minimum_category<std::random_access_iterator_tag, std::random_access_iterator_tag>::type, std::random_access_iterator_tag>));
+
+    return boost::report_errors();
+}

test/minimum_category_compile_fail.cpp

@@ -0,0 +1,19 @@
+// Copyright Andrey Semashev 2014.
+//
+// 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/iterator/minimum_category.hpp>
+
+using boost::iterators::minimum_category;
+
+struct A {};
+struct B {};
+
+int main(int, char*[])
+{
+    minimum_category<A, B>::type cat;
+
+    return 0;
+}

test/unit_tests.cpp

@@ -7,7 +7,7 @@
 
 #include "static_assert_same.hpp"
 
-#include <boost/iterator/detail/minimum_category.hpp>
+#include <boost/iterator/minimum_category.hpp>
 
 struct X { int a; };
 
@@ -29,7 +29,7 @@ void operator_arrow_test()
 template <class T, class U, class Min>
 struct static_assert_min_cat
   : static_assert_same<
-       typename boost::iterators::detail::minimum_category<T,U>::type, Min
+       typename boost::iterators::minimum_category<T,U>::type, Min
     >
 {};