Make default constructors constexpr

test/sp_constexpr_test.cpp

@@ -0,0 +1,71 @@
+//
+// sp_constexpr_test.cpp
+//
+// Copyright 2017 Peter Dimov
+//
+// 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
+//
+
+#include <boost/config.hpp>
+
+#if defined( BOOST_NO_CXX11_CONSTEXPR )
+
+int main()
+{
+}
+
+#else
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+struct X: public boost::enable_shared_from_this<X>
+{
+};
+
+struct Z
+{
+    Z();
+};
+
+static Z z;
+
+static boost::shared_ptr<X> p1;
+static boost::weak_ptr<X> p2;
+
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+  static boost::shared_ptr<X> p3( nullptr );
+#endif
+
+Z::Z()
+{
+    p1.reset( new X );
+    p2 = p1;
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+    p3.reset( new X );
+#endif
+}
+
+int main()
+{
+    BOOST_TEST( p1.get() != 0 );
+    BOOST_TEST_EQ( p1.use_count(), 1 );
+
+    BOOST_TEST_EQ( p2.use_count(), 1 );
+    BOOST_TEST_EQ( p2.lock(), p1 );
+
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+
+    BOOST_TEST( p3.get() != 0 );
+    BOOST_TEST_EQ( p3.use_count(), 1 );
+
+#endif
+
+    return boost::report_errors();
+}
+
+#endif // #if defined( BOOST_NO_CXX11_CONSEXPR )