1 files changed, 159 insertions, 0 deletions
diff --git a/src/boost/libs/variant2/test/variant_subset.cpp b/src/boost/libs/variant2/test/variant_subset.cpp
new file mode 100644
index 00000000..90c9bc21
--- /dev/null
+++ b/src/boost/libs/variant2/test/variant_subset.cpp
@@ -0,0 +1,159 @@
+
+// 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
+
+#if defined(_MSC_VER)
+# pragma warning( disable: 4702 ) // unreachable code
+#endif
+
+#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;
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+
+struct X1
+{
+    int v;
+
+    X1(): v(0) {}
+    explicit X1(int v): v(v) {}
+    X1(X1 const& r): v(r.v) {}
+    X1(X1&& r): v(r.v) {}
+    X1& operator=( X1 const& r ) { v = r.v; return *this; }
+    X1& operator=( X1&& r ) { v = r.v; return *this; }
+};
+
+inline bool operator==( X1 const& a, X1 const& b ) { return a.v == b.v; }
+
+STATIC_ASSERT( !std::is_nothrow_default_constructible<X1>::value );
+STATIC_ASSERT( !std::is_nothrow_copy_constructible<X1>::value );
+STATIC_ASSERT( !std::is_nothrow_move_constructible<X1>::value );
+STATIC_ASSERT( !std::is_nothrow_copy_assignable<X1>::value );
+STATIC_ASSERT( !std::is_nothrow_move_assignable<X1>::value );
+
+struct X2
+{
+    int v;
+
+    X2(): v(0) {}
+    explicit X2(int v): v(v) {}
+    X2(X2 const& r): v(r.v) {}
+    X2(X2&& r): v(r.v) {}
+    X2& operator=( X2 const& r ) { v = r.v; return *this; }
+    X2& operator=( X2&& r ) { v = r.v; return *this; }
+};
+
+inline bool operator==( X2 const& a, X2 const& b ) { return a.v == b.v; }
+
+STATIC_ASSERT( !std::is_nothrow_default_constructible<X2>::value );
+STATIC_ASSERT( !std::is_nothrow_copy_constructible<X2>::value );
+STATIC_ASSERT( !std::is_nothrow_move_constructible<X2>::value );
+STATIC_ASSERT( !std::is_nothrow_copy_assignable<X2>::value );
+STATIC_ASSERT( !std::is_nothrow_move_assignable<X2>::value );
+
+int main()
+{
+    {
+        variant<int, float> v1( 1 );
+
+        variant<int> v2 = v1.subset<int>();
+
+        BOOST_TEST( holds_alternative<int>( v2 ) );
+        BOOST_TEST_EQ( get<int>( v1 ), get<int>( v2 ) );
+
+        BOOST_TEST_THROWS( v1.subset<float>(), bad_variant_access );
+
+        variant<int> v3 = std::move(v1).subset<int>();
+
+        BOOST_TEST( holds_alternative<int>( v3 ) );
+        BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
+
+        BOOST_TEST_THROWS( std::move(v1).subset<float>(), bad_variant_access );
+    }
+
+    {
+        variant<int, float> const v1( 1 );
+
+        variant<int> v2 = v1.subset<int>();
+
+        BOOST_TEST( holds_alternative<int>( v2 ) );
+        BOOST_TEST_EQ( get<int>( v1 ), get<int>( v2 ) );
+
+        BOOST_TEST_THROWS( v1.subset<float>(), bad_variant_access );
+
+        variant<int> v3 = std::move(v1).subset<int>();
+
+        BOOST_TEST( holds_alternative<int>( v3 ) );
+        BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
+
+        BOOST_TEST_THROWS( std::move(v1).subset<float>(), bad_variant_access );
+    }
+
+    {
+        variant<int, float> v1( 1 );
+
+        variant<int, float> v2 = v1.subset<int, float>();
+
+        BOOST_TEST( holds_alternative<int>( v2 ) );
+        BOOST_TEST_EQ( get<int>( v1 ), get<int>( v2 ) );
+
+        variant<int, float> v3 = std::move(v1).subset<int, float>();
+
+        BOOST_TEST( holds_alternative<int>( v3 ) );
+        BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
+    }
+
+    {
+        variant<int, float> v1( 1 );
+
+        variant<float, int> v2 = v1.subset<float, int>();
+
+        BOOST_TEST( holds_alternative<int>( v2 ) );
+        BOOST_TEST_EQ( get<int>( v1 ), get<int>( v2 ) );
+
+        variant<float, int> v3 = std::move(v1).subset<float, int>();
+
+        BOOST_TEST( holds_alternative<int>( v3 ) );
+        BOOST_TEST_EQ( get<int>( v2 ), get<int>( v3 ) );
+    }
+
+    {
+        variant<int, float, std::string> v1( "s1" );
+
+        variant<int, std::string> v2 = v1.subset<int, std::string>();
+
+        BOOST_TEST( holds_alternative<std::string>( v2 ) );
+        BOOST_TEST_EQ( get<std::string>( v1 ), get<std::string>( v2 ) );
+
+        variant<float, std::string> v3 = std::move(v1).subset<float, std::string>();
+
+        BOOST_TEST( holds_alternative<std::string>( v3 ) );
+        BOOST_TEST_EQ( get<std::string>( v2 ), get<std::string>( v3 ) );
+    }
+
+    {
+        variant<int, int, float, float, X1, X2> v1{ X1{1} };
+
+        variant<X1, X2> v2 = v1.subset<X1, X2>();
+
+        BOOST_TEST( holds_alternative<X1>( v2 ) );
+        BOOST_TEST_EQ( get<X1>( v1 ).v, get<X1>( v2 ).v );
+
+        variant<X1, X2> v3 = std::move( v1 ).subset<X1, X2>();
+
+        BOOST_TEST( holds_alternative<X1>( v3 ) );
+        BOOST_TEST_EQ( get<X1>( v2 ).v, get<X1>( v3 ).v );
+    }
+
+    return boost::report_errors();
+}