1 files changed, 103 insertions, 0 deletions
diff --git a/src/boost/libs/variant2/test/variant_default_construct.cpp b/src/boost/libs/variant2/test/variant_default_construct.cpp
new file mode 100644
index 00000000..894934cb
--- /dev/null
+++ b/src/boost/libs/variant2/test/variant_default_construct.cpp
@@ -0,0 +1,103 @@
+
+// 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/variant2/variant.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <utility>
+#include <string>
+
+using namespace boost::variant2;
+
+struct X
+{
+    X();
+};
+
+struct Y
+{
+    Y() = delete;
+};
+
+int main()
+{
+    {
+        variant<int> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), 0 );
+    }
+
+    {
+        variant<int const> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), 0 );
+    }
+
+    {
+        variant<int, float, std::string> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), 0 );
+    }
+
+    {
+        variant<int, int, std::string> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), 0 );
+    }
+
+    {
+        variant<std::string> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), std::string() );
+    }
+
+    {
+        variant<std::string const> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), std::string() );
+    }
+
+    {
+        variant<std::string, int, float> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), std::string() );
+    }
+
+    {
+        variant<std::string, std::string, float> v;
+
+        BOOST_TEST_EQ( v.index(), 0 );
+        BOOST_TEST_EQ( get<0>(v), std::string() );
+    }
+
+    {
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int const>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, X>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, float, X>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, int, X>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_nothrow_default_constructible<variant<int, X, X>>));
+
+        BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X>>));
+        BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int>>));
+        BOOST_TEST_TRAIT_FALSE((std::is_nothrow_default_constructible<variant<X, int, float>>));
+
+        BOOST_TEST_TRAIT_TRUE((std::is_default_constructible<variant<int, Y>>));
+        BOOST_TEST_TRAIT_FALSE((std::is_default_constructible<variant<Y, int>>));
+    }
+
+    return boost::report_errors();
+}