move enable_if tests into their own subdirectory

[SVN r25649]

enable_if/test/lazy_test.cpp

@@ -0,0 +1,100 @@
+// Boost enable_if library
+
+// Copyright 2003 <20> The Trustees of Indiana University.
+
+// 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)
+
+//    Authors: Jaakko J<>rvi (jajarvi at osl.iu.edu)
+//             Jeremiah Willcock (jewillco at osl.iu.edu)
+//             Andrew Lumsdaine (lums at osl.iu.edu)
+
+// Testing all variations of lazy_enable_if.
+
+#include <boost/test/minimal.hpp>
+#include <boost/mpl/not.hpp>
+
+#include <boost/utility/enable_if.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+using boost::lazy_enable_if;
+using boost::lazy_disable_if;
+
+using boost::lazy_enable_if_c;
+using boost::lazy_disable_if_c;
+
+
+template <class T>
+struct is_int_or_double {
+  BOOST_STATIC_CONSTANT(bool, 
+    value = (boost::is_same<T, int>::value || 
+             boost::is_same<T, double>::value));
+};
+
+template <class T>
+struct some_traits {
+  typedef typename T::does_not_exist type;
+};
+
+template <>
+struct some_traits<int> {
+  typedef bool type;
+};
+
+template <>
+struct some_traits<double> {
+  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<is_int_or_double<T>, some_traits<T> >::type
+  foo(T t) { return true; }
+
+  template<class T>
+  typename lazy_enable_if_c<is_int_or_double<T>::value, some_traits<T> >::type
+  foo2(T t) { return true; }
+}
+
+namespace B {
+  template<class T>
+  typename lazy_disable_if<is_int_or_double<T>, make_bool<T> >::type
+  foo(T t) { return false; }
+
+  template<class T>
+  typename lazy_disable_if_c<is_int_or_double<T>::value, make_bool<T> >::type
+  foo2(T t) { return false; }
+}
+
+int test_main(int, char*[])
+{
+  using namespace A;
+  using namespace B;
+  BOOST_CHECK(foo(1));
+  BOOST_CHECK(foo(1.0));
+
+  BOOST_CHECK(!foo("1"));  
+  BOOST_CHECK(!foo(static_cast<void*>(0)));  
+
+  BOOST_CHECK(foo2(1));
+  BOOST_CHECK(foo2(1.0));
+
+  BOOST_CHECK(!foo2("1"));  
+  BOOST_CHECK(!foo2(static_cast<void*>(0)));  
+
+  return 0;
+}
+