changes after pre-review

[SVN r1503]

test/enable_if_lazy_test.cpp

@@ -0,0 +1,93 @@
+//
+//    Copyright 2003 © The Trustees of Indiana University.  All rights
+//    reserved.
+//
+//    See the file enable_if_LICENSE for licensing conditions.
+//
+//    Authors: Jaakko Järvi (jajarvi@osl.iu.edu)
+//             Jeremiah Willcock (jewillco@osl.iu.edu)
+//             Andrew Lumsdaine (lums@osl.iu.edu)
+//
+
+#include <boost/test/minimal.hpp>
+#include <boost/mpl/not.hpp>
+
+#include <boost/utility/enable_if.hpp>
+#include <boost/type_traits/is_arithmetic.hpp>
+
+using boost::lazy_enable_if;
+using boost::lazy_disable_if;
+
+using boost::lazy_enable_if_c;
+using boost::lazy_disable_if_c;
+
+using boost::is_arithmetic;
+
+template <class T>
+struct some_traits {
+  BOOST_STATIC_CONSTANT(bool, value = false);
+};
+
+template <>
+struct some_traits<int> {
+  BOOST_STATIC_CONSTANT(bool, value = true);
+  typedef bool type;
+};
+
+template <>
+struct some_traits<double> {
+  BOOST_STATIC_CONSTANT(bool, value = true);
+  typedef bool type;
+};
+
+template <class T>
+struct make_bool {
+  typedef bool type;
+};
+
+template <>
+struct make_bool<int> {};
+
+template <>
+struct make_bool<double> {};
+
+namespace A {
+
+  template<class T>
+  typename lazy_enable_if<some_traits<T>, some_traits<T> >::type
+  foo(T t) { return true; }
+
+  template<class T>
+  typename lazy_enable_if_c<some_traits<T>::value, some_traits<T> >::type
+  foo2(T t) { return true; }
+}
+
+namespace B {
+  template<class T>
+  typename lazy_disable_if<some_traits<T>, make_bool<T> >::type
+  foo(T t) { return false; }
+
+  template<class T>
+  typename lazy_disable_if_c<some_traits<T>::value, make_bool<T> >::type
+  foo2(T t) { return false; }
+}
+
+int test_main(int, char*[])
+{
+  using namespace A;
+  using namespace B;
+  BOOST_TEST(foo(1));
+  BOOST_TEST(foo(1.0));
+
+  BOOST_TEST(!foo("1"));  
+  BOOST_TEST(!foo(static_cast<void*>(0)));  
+
+  BOOST_TEST(foo2(1));
+  BOOST_TEST(foo2(1.0));
+
+  BOOST_TEST(!foo2("1"));  
+  BOOST_TEST(!foo2(static_cast<void*>(0)));  
+
+  return 0;
+}
+