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+// Copyright 2014 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+// may be used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#if !defined(UTILS_FORMAT_CONTAINERS_IPP)
+#define UTILS_FORMAT_CONTAINERS_IPP
+
+#include "utils/format/containers.hpp"
+
+#include <ostream>
+
+
+/// Injects the object into a stream.
+///
+/// \param output The stream into which to inject the object.
+/// \param object The object to format.
+///
+/// \return The output stream.
+template< typename K, typename V >
+std::ostream&
+std::operator<<(std::ostream& output, const std::map< K, V >& object)
+{
+ output << "map(";
+ typename std::map< K, V >::size_type counter = 0;
+ for (typename std::map< K, V >::const_iterator iter = object.begin();
+ iter != object.end(); ++iter, ++counter) {
+ if (counter != 0)
+ output << ", ";
+ output << (*iter).first << "=" << (*iter).second;
+ }
+ output << ")";
+ return output;
+}
+
+
+/// Injects the object into a stream.
+///
+/// \param output The stream into which to inject the object.
+/// \param object The object to format.
+///
+/// \return The output stream.
+template< typename T1, typename T2 >
+std::ostream&
+std::operator<<(std::ostream& output, const std::pair< T1, T2 >& object)
+{
+ output << "pair(" << object.first << ", " << object.second << ")";
+ return output;
+}
+
+
+/// Injects the object into a stream.
+///
+/// \param output The stream into which to inject the object.
+/// \param object The object to format.
+///
+/// \return The output stream.
+template< typename T >
+std::ostream&
+std::operator<<(std::ostream& output, const std::shared_ptr< T > object)
+{
+ if (object.get() == NULL) {
+ output << "<NULL>";
+ } else {
+ output << *object;
+ }
+ return output;
+}
+
+
+/// Injects the object into a stream.
+///
+/// \param output The stream into which to inject the object.
+/// \param object The object to format.
+///
+/// \return The output stream.
+template< typename T >
+std::ostream&
+std::operator<<(std::ostream& output, const std::set< T >& object)
+{
+ output << "set(";
+ typename std::set< T >::size_type counter = 0;
+ for (typename std::set< T >::const_iterator iter = object.begin();
+ iter != object.end(); ++iter, ++counter) {
+ if (counter != 0)
+ output << ", ";
+ output << (*iter);
+ }
+ output << ")";
+ return output;
+}
+
+
+/// Injects the object into a stream.
+///
+/// \param output The stream into which to inject the object.
+/// \param object The object to format.
+///
+/// \return The output stream.
+template< typename T >
+std::ostream&
+std::operator<<(std::ostream& output, const std::vector< T >& object)
+{
+ output << "[";
+ for (typename std::vector< T >::size_type i = 0; i < object.size(); ++i) {
+ if (i != 0)
+ output << ", ";
+ output << object[i];
+ }
+ output << "]";
+ return output;
+}
+
+
+#endif // !defined(UTILS_FORMAT_CONTAINERS_IPP)