Variant

CMakeLists.txt

@@ -166,6 +166,7 @@ IF (MSGPACK_ENABLE_CXX)
         include/msgpack/adaptor/adaptor_base.hpp
         include/msgpack/adaptor/bool.hpp
         include/msgpack/adaptor/boost/fusion.hpp
+        include/msgpack/adaptor/boost/msgpack_variant.hpp
         include/msgpack/adaptor/boost/optional.hpp
         include/msgpack/adaptor/boost/string_ref.hpp
         include/msgpack/adaptor/char_ptr.hpp

example/CMakeLists.txt

@@ -1,3 +1,4 @@
 ADD_SUBDIRECTORY (c)
 ADD_SUBDIRECTORY (cpp03)
 ADD_SUBDIRECTORY (cpp11)
+ADD_SUBDIRECTORY (boost)

example/boost/CMakeLists.txt

@@ -0,0 +1,24 @@
+IF (MSGPACK_BOOST)
+    LIST (APPEND exec_PROGRAMS
+        msgpack_variant_capitalize.cpp
+        msgpack_variant_mapbased.cpp
+    )
+ENDIF ()
+
+FOREACH (source_file ${exec_PROGRAMS})
+    GET_FILENAME_COMPONENT (source_file_we ${source_file} NAME_WE)
+    ADD_EXECUTABLE (
+        ${source_file_we}
+        ${source_file}
+    )
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+        SET_PROPERTY (TARGET ${source_file_we} APPEND_STRING PROPERTY COMPILE_FLAGS "-Wall -Wextra -Werror -Wno-mismatched-tags -g -O3")
+    ENDIF ()
+    IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+        IF (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
+            STRING(REGEX REPLACE "/W[0-4]" "/W3 /WX" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+        ELSE ()
+            SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W3 /WX")
+        ENDIF ()
+    ENDIF ()
+ENDFOREACH ()

example/boost/msgpack_variant_capitalize.cpp

@@ -0,0 +1,102 @@
+// MessagePack for C++ example
+//
+// Copyright (C) 2015 KONDO Takatoshi
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+
+#include <string>
+#include <sstream>
+#include <iostream>
+#include <algorithm>
+#include <cctype>
+
+#include <msgpack.hpp>
+
+struct user {
+    std::string name;
+    int age;
+    std::string address;
+    MSGPACK_DEFINE(name, age, address);
+};
+
+struct proc:boost::static_visitor<void> {
+    void operator()(std::string& v) const {
+        std::cout << "  match std::string& v" << std::endl;
+        std::cout << "    v: " << v << std::endl;
+        std::cout << "    capitalize" << std::endl;
+        for (std::string::iterator it = v.begin(), end = v.end();
+             it != end;
+             ++it) {
+            *it = std::toupper(*it);
+        }
+    }
+    void operator()(std::vector<msgpack::type::variant>& v) const {
+        std::cout << "match vector (msgpack::type::ARRAY)" << std::endl;
+        std::vector<msgpack::type::variant>::iterator it = v.begin();
+        std::vector<msgpack::type::variant>::const_iterator end = v.end();
+        for (; it != end; ++it) {
+            boost::apply_visitor(*this, *it);
+        }
+    }
+    template <typename T>
+    void operator()(T const&) const {
+        std::cout << "  match others" << std::endl;
+    }
+};
+
+void print(std::string const& buf) {
+    for (std::string::const_iterator it = buf.begin(), end = buf.end();
+         it != end;
+         ++it) {
+        std::cout
+            << std::setw(2)
+            << std::hex
+            << std::setfill('0')
+            << (static_cast<int>(*it) & 0xff)
+            << ' ';
+    }
+    std::cout << std::dec << std::endl;
+}
+
+
+int main() {
+    std::stringstream ss1;
+    user u;
+    u.name = "Takatoshi Kondo";
+    u.age = 42;
+    u.address = "Tokyo, JAPAN";
+
+    std::cout << "Packing object." << std::endl;
+    msgpack::pack(ss1, u);
+    print(ss1.str());
+
+    msgpack::unpacked unp1 = msgpack::unpack(ss1.str().data(), ss1.str().size());
+    msgpack::object const& obj1 = unp1.get();
+    std::cout << "Unpacked msgpack object." << std::endl;
+    std::cout << obj1 << std::endl;
+
+    msgpack::type::variant v = obj1.as<msgpack::type::variant>();
+    std::cout << "Applying proc..." << std::endl;
+    boost::apply_visitor(proc(), v);
+
+    std::stringstream ss2;
+    std::cout << "Packing modified object." << std::endl;
+    msgpack::pack(ss2, v);
+    print(ss2.str());
+
+    msgpack::unpacked unp2 = msgpack::unpack(ss2.str().data(), ss2.str().size());
+    msgpack::object const& obj2 = unp2.get();
+    std::cout << "Modified msgpack object." << std::endl;
+    std::cout << obj2 << std::endl;
+}

example/boost/msgpack_variant_mapbased.cpp

@@ -0,0 +1,100 @@
+// MessagePack for C++ example
+//
+// Copyright (C) 2015 KONDO Takatoshi
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+
+#include <string>
+#include <sstream>
+#include <iostream>
+
+#include <msgpack.hpp>
+
+struct user {
+    std::string name;
+    int age;
+    std::string address;
+    MSGPACK_DEFINE_MAP(name, age, address);
+};
+
+struct proc:boost::static_visitor<void> {
+    // msgpack::type::MAP is converted to std::multimap, not std::map.
+    void operator()(std::multimap<msgpack::type::variant_ref, msgpack::type::variant_ref>& v) const {
+        std::cout << "match map" << std::endl;
+        std::multimap<msgpack::type::variant_ref, msgpack::type::variant_ref>::iterator it = v.begin();
+        std::multimap<msgpack::type::variant_ref, msgpack::type::variant_ref>::iterator end = v.end();
+        while(it != end) {
+            boost::string_ref const& key = boost::get<boost::string_ref>(it->first);
+            if (key == "name") {
+                boost::string_ref const& value = boost::get<boost::string_ref>(it->second);
+                if (value == "Takatoshi Kondo") {
+                    // You can add values to msgpack::type::variant_ref.
+                    v.insert(
+                        std::multimap<msgpack::type::variant_ref, msgpack::type::variant_ref>::value_type(
+                            std::string("role"),
+                            std::string("msgpack-c committer")
+                        )
+                    );
+                }
+                ++it;
+            }
+            else if (key == "age") {
+                // You can remove key-value pair from msgpack::type::variant_ref
+
+#if defined(MSGPACK_USE_CPP03)
+                v.erase(it++);
+#else  // defined(MSGPACK_USE_CPP03)
+#  if MSGPACK_LIB_STD_CXX
+                it = v.erase(std::multimap<msgpack::type::variant_ref, msgpack::type::variant_ref>::const_iterator(it));
+#  else  // MSGPACK_LIB_STD_CXX
+                it = v.erase(it);
+#  endif // MSGPACK_LIB_STD_CXX
+#endif // defined(MSGPACK_USE_CPP03)
+            }
+            else if (key == "address") {
+                // When you want to append string
+                // "Tokyo" -> "Tokyo, JAPAN"
+                // Use msgpack::type::variant instead of msgpack::type::varinat_ref
+                // or do as follows:
+                boost::string_ref const& value = boost::get<boost::string_ref>(it->second);
+                it->second = std::string(&value.front(), value.size()) + ", JAPAN";
+                ++it;
+            }
+        }
+    }
+    template <typename T>
+    void operator()(T const&) const {
+        std::cout << "  match others" << std::endl;
+    }
+};
+
+int main() {
+    std::stringstream ss;
+    user u;
+    u.name = "Takatoshi Kondo";
+    u.age = 42;
+    u.address = "Tokyo";
+    msgpack::pack(ss, u);
+
+    msgpack::unpacked unp = msgpack::unpack(ss.str().data(), ss.str().size());
+    msgpack::object const& obj = unp.get();
+    std::cout << "Unpacked msgpack object." << std::endl;
+    std::cout << obj << std::endl;
+    msgpack::type::variant_ref v = obj.as<msgpack::type::variant_ref>();
+    std::cout << "Applying proc..." << std::endl;
+    boost::apply_visitor(proc(), v);
+    msgpack::zone z;
+    std::cout << "Applied msgpack object." << std::endl;
+    std::cout << msgpack::object(v, z) << std::endl;
+}