Merge from trunk: added basic rvalue support and marked some functions with BOOST_NOEXCEPT (fixes #7620)

[SVN r81455]
2026-02-09 11:42:15 +00:00 · 2012-11-21 14:47:12 +00:00
parent 5b34fe155f
commit 591ae9bf26
5 changed files with 538 additions and 20 deletions
--- a/test/rvalue_test.cpp
+++ b/test/rvalue_test.cpp
@@ -0,0 +1,137 @@
+//-----------------------------------------------------------------------------
+// boost-libs variant/test/rvalue_test.cpp source file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2012
+// Antony Polukhin
+//
+// 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"
+
+#include "boost/test/minimal.hpp"
+#include "boost/variant.hpp"
+
+// This test requires BOOST_HAS_RVALUE_REFS
+
+#ifndef BOOST_HAS_RVALUE_REFS
+
+void run()
+{
+    BOOST_CHECK(true);
+}
+
+#else 
+
+class move_copy_conting_class {
+public:
+    static unsigned int moves_count;
+    static unsigned int copy_count;
+
+    move_copy_conting_class(){}
+    move_copy_conting_class(move_copy_conting_class&&) {
+        ++ moves_count;
+    }
+
+    move_copy_conting_class& operator=(move_copy_conting_class&&) {
+        ++ moves_count;
+        return *this;
+    }
+
+    move_copy_conting_class(const move_copy_conting_class&) {
+        ++ copy_count;
+    }
+    move_copy_conting_class& operator=(const move_copy_conting_class&) {
+        ++ copy_count;
+        return *this;
+    }
+};
+
+unsigned int move_copy_conting_class::moves_count = 0;
+unsigned int move_copy_conting_class::copy_count = 0;
+
+void run()
+{
+    typedef boost::variant<int, move_copy_conting_class> variant_I_type;
+    variant_I_type v1, v2;
+    
+    // Assuring that `move_copy_conting_class` was not created
+    BOOST_CHECK(move_copy_conting_class::copy_count == 0);
+    BOOST_CHECK(move_copy_conting_class::moves_count == 0);
+    
+    v1 = move_copy_conting_class();
+    // Assuring that `move_copy_conting_class` was moved at least once
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+    
+    unsigned int total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
+    move_copy_conting_class var;
+    v1 = 0;
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v1 = var;
+    // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
+    BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
+
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v2 = static_cast<variant_I_type&&>(v1);
+    // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+    BOOST_CHECK(move_copy_conting_class::copy_count == 0);
+
+    v1 = move_copy_conting_class();
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v2 = static_cast<variant_I_type&&>(v1);
+    // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+    BOOST_CHECK(move_copy_conting_class::copy_count == 0);
+    total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v1 = v2;
+    // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
+    BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
+
+
+    typedef boost::variant<move_copy_conting_class, int> variant_II_type;
+    variant_II_type v3;
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v1 = static_cast<variant_II_type&&>(v3);
+    // Assuring that `move_copy_conting_class` in v3 was moved at least once (v1 and v3 have different types)
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    v2 = static_cast<variant_I_type&&>(v1);
+    // Assuring that `move_copy_conting_class` in v1 was moved at least once (v1 and v3 have different types)
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    variant_I_type v5(static_cast<variant_I_type&&>(v1));
+    // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
+    BOOST_CHECK(move_copy_conting_class::moves_count != 0);
+    BOOST_CHECK(move_copy_conting_class::copy_count == 0);
+
+    total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
+    move_copy_conting_class::moves_count = 0;
+    move_copy_conting_class::copy_count = 0;
+    variant_I_type v6(v1);
+    // Assuring that move constructor moves/copyes value not more times than copy constructor
+    BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
+}
+
+
+#endif
+
+
+int test_main(int , char* [])
+{
+   run();
+   return 0;
+}