initial check in

test_copy_elision.cpp

@@ -0,0 +1,77 @@
+#include <iostream>
+#include <exception>
+#include <string>
+#include <algorithm>
+
+class copy_tracker
+{
+	int v;
+public:
+	copy_tracker()
+		: v(0)
+	{
+		std::cout << "copy_tracker::copy_tracker()" << std::endl;
+	}
+
+	copy_tracker( const copy_tracker& c )
+		: v( c.v )
+	{
+		std::cout << "copy_tracker::copy_tracker( copy_tracker& c )" << std::endl;
+	}
+
+	void use_object()
+	{
+		std::cout << v << std::endl;
+	}
+};
+
+copy_tracker copy_tracker_return_by_value2()
+{
+	return copy_tracker();
+}
+
+copy_tracker copy_tracker_return_by_value()
+{
+	return copy_tracker_return_by_value2();
+}
+
+void copy_tracker_pass_by_value2(copy_tracker o)
+{
+	return o.use_object();
+}
+
+void copy_tracker_pass_by_value(copy_tracker o)
+{
+	return copy_tracker_pass_by_value2(o);
+}
+
+void test_copy_tracker()
+{
+	std::cout << "Return by value and assign." << std::endl;
+	copy_tracker o = copy_tracker_return_by_value();
+	std::cout << "Pass lvalue." << std::endl;
+	copy_tracker_pass_by_value( o );
+	std::cout << "Pass rvalue." << std::endl;
+	const copy_tracker& o2 = copy_tracker_return_by_value();
+	copy_tracker_pass_by_value2( o2 );
+	std::cout << "Pass rvalue 2." << std::endl;
+	copy_tracker_pass_by_value2( copy_tracker_return_by_value() );
+}
+
+int main ( void )
+{try{
+
+	test_copy_tracker();
+	return 0;
+}
+catch ( const std::exception& e )
+{
+	std::cerr << std::endl
+			<< "std::exception(\"" << e.what() << "\")." << std::endl;
+}
+catch ( ... )
+{
+	std::cerr  << std::endl
+			<< "unknown exception." << std::endl;
+}}
+