Merge pull request #1113 from redboltz/update_to_611

Update the version to 6.1.1.

.github/depends/zlib.sh

@@ -27,9 +27,9 @@ while getopts "b:t:p:" c; do
 done
 
 mkdir $prefix || exit 1
-wget https://zlib.net/zlib-1.2.13.tar.gz || exit 1
+wget https://zlib.net/zlib-1.3.1.tar.gz || exit 1
-tar -xf zlib-1.2.13.tar.gz || exit 1
+tar -xf zlib-1.3.1.tar.gz || exit 1
-cd zlib-1.2.13
+cd zlib-1.3.1
 
 build()
 {

.github/workflows/coverage.yml

@@ -56,6 +56,7 @@ jobs:
             -D MSGPACK_BUILD_TESTS=ON \
             -D CMAKE_BUILD_TYPE=Debug \
             -D MSGPACK_GEN_COVERAGE=ON \
+            -D MSGPACK_USE_STD_VARIANT_ADAPTOR=ON \
             -D CMAKE_PREFIX_PATH="$HOME/zlib-prefix/64;$HOME/boost-prefix/64" \
             -B build \
             -S . || exit 1

.github/workflows/gha.yml

@@ -145,6 +145,7 @@ jobs:
           3)
             export CXX="g++-10"
             export MSGPACK_CXX_VERSION="MSGPACK_CXX17=ON"
+            export MSGPACK_USE_STD_VARIANT_ADAPTOR="MSGPACK_USE_STD_VARIANT_ADAPTOR=ON"
             ;;
           4)
             export CXX="clang++-10"

.gitignore

@@ -49,3 +49,8 @@ Makefile
 /test/streaming_c
 /test/version
 /test/zone
+
+build
+*-build
+.cache
+compile_commands.json

CHANGELOG.md

@@ -1,3 +1,14 @@
+# 2024-04-02 version 6.1.1
+  * Fix compilation error when std::variant has the same types (#1112)
+  * Improve CI (#1090, #1110)
+  * Fix to avoid common function name's (has_as::check) ambiguity/conflict with other libraries' macros  (#1085)
+
+# 2023-07-08 version 6.1.0
+  * Remove dependency on boost in chrono.hpp (#1076)
+  * Add support for std::variant behavior (#1075)
+  * Fix msgpack::type::variant behavior to respect MessagePack format (#1071)
+  * Add rebind allocators (#1065)
+
 # 2023-03-02 version 6.0.0
 ## << breaking changes >>
   * Change CMake package name of C++ library to msgpack-cxx (#1054)

CMakeLists.txt

@@ -23,16 +23,17 @@ OPTION (MSGPACK_CXX14 "Using c++14 compiler" OFF)
 OPTION (MSGPACK_CXX17 "Using c++17 compiler" OFF)
 OPTION (MSGPACK_CXX20 "Using c++20 compiler" OFF)
 
-OPTION (MSGPACK_32BIT            "32bit compile"                        OFF)
+OPTION (MSGPACK_32BIT                   "32bit compile"                        OFF)
-OPTION (MSGPACK_USE_BOOST        "Use Boost libraried"                  ON)
+OPTION (MSGPACK_USE_BOOST               "Use Boost libraried"                  ON)
-OPTION (MSGPACK_USE_X3_PARSE     "Use Boost X3 parse"                   OFF)
+OPTION (MSGPACK_USE_X3_PARSE            "Use Boost X3 parse"                   OFF)
-OPTION (MSGPACK_BUILD_TESTS      "Build tests"                          OFF)
+OPTION (MSGPACK_BUILD_TESTS             "Build tests"                          OFF)
-OPTION (MSGPACK_BUILD_DOCS       "Build Doxygen documentation"          ON)
+OPTION (MSGPACK_BUILD_DOCS              "Build Doxygen documentation"          ON)
-OPTION (MSGPACK_FUZZ_REGRESSION  "Enable regression testing"            OFF)
+OPTION (MSGPACK_FUZZ_REGRESSION         "Enable regression testing"            OFF)
-OPTION (MSGPACK_BUILD_EXAMPLES   "Build msgpack examples"               OFF)
+OPTION (MSGPACK_BUILD_EXAMPLES          "Build msgpack examples"               OFF)
-OPTION (MSGPACK_GEN_COVERAGE     "Generate coverage report"             OFF)
+OPTION (MSGPACK_GEN_COVERAGE            "Generate coverage report"             OFF)
-OPTION (MSGPACK_USE_STATIC_BOOST "Statically link with boost libraries" OFF)
+OPTION (MSGPACK_USE_STATIC_BOOST        "Statically link with boost libraries" OFF)
-OPTION (MSGPACK_CHAR_SIGN        "Char sign to use (signed or unsigned)")
+OPTION (MSGPACK_CHAR_SIGN               "Char sign to use (signed or unsigned)")
+OPTION (MSGPACK_USE_STD_VARIANT_ADAPTOR "Enable the adaptor for std::variant"  OFF)
 
 SET (CMAKE_CXX_STANDARD_REQUIRED ON)
 
@@ -92,6 +93,10 @@ ELSE ()
     TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_DEFAULT_API_VERSION=3)
 ENDIF ()
 
+IF (MSGPACK_USE_STD_VARIANT_ADAPTOR)
+    TARGET_COMPILE_DEFINITIONS(msgpack-cxx INTERFACE MSGPACK_USE_STD_VARIANT_ADAPTOR)
+ENDIF ()
+
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     IF (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.1)
         INCLUDE (CheckCXXSourceCompiles)

Files.cmake

@@ -33,6 +33,7 @@ SET (msgpack-cxx_HEADERS
     include/msgpack/adaptor/cpp17/carray_byte.hpp
     include/msgpack/adaptor/cpp17/optional.hpp
     include/msgpack/adaptor/cpp17/string_view.hpp
+    include/msgpack/adaptor/cpp17/variant.hpp
     include/msgpack/adaptor/cpp17/vector_byte.hpp
     include/msgpack/adaptor/cpp20/span.hpp
     include/msgpack/adaptor/define.hpp
@@ -542,6 +543,7 @@ SET (msgpack-cxx_HEADERS
     include/msgpack/v1/adaptor/cpp17/carray_byte.hpp
     include/msgpack/v1/adaptor/cpp17/optional.hpp
     include/msgpack/v1/adaptor/cpp17/string_view.hpp
+    include/msgpack/v1/adaptor/cpp17/variant.hpp
     include/msgpack/v1/adaptor/cpp17/vector_byte.hpp
     include/msgpack/v1/adaptor/cpp20/span.hpp
     include/msgpack/v1/adaptor/define.hpp

README.md

@@ -1,7 +1,7 @@
 `msgpack` for C++
 ===================
 
-Version 6.0.0 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
+Version 6.1.1 [![Build Status](https://github.com/msgpack/msgpack-c/workflows/CI/badge.svg?branch=cpp_master)](https://github.com/msgpack/msgpack-c/actions) [![Build status](https://ci.appveyor.com/api/projects/status/8kstcgt79qj123mw/branch/cpp_master?svg=true)](https://ci.appveyor.com/project/redboltz/msgpack-c/branch/cpp_master)
 [![codecov](https://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master/graph/badge.svg)](https://codecov.io/gh/msgpack/msgpack-c/branch/cpp_master)
 
 It's like JSON but smaller and faster.

appveyor.yml

@@ -1,4 +1,4 @@
-version: 6.0.0.{build}
+version: 6.1.1.{build}
 
 branches:
   only:
@@ -23,10 +23,10 @@ environment:
       boost_subdir: lib32-msvc-14.0
 build_script:
   - ps: |
-      appveyor DownloadFile http://zlib.net/zlib-1.2.13.tar.gz -FileName zlib-1.2.13.tar.gz
+      appveyor DownloadFile http://zlib.net/zlib-1.3.1.tar.gz -FileName zlib-1.3.1.tar.gz
-      7z x zlib-1.2.13.tar.gz 2> $null
+      7z x zlib-1.3.1.tar.gz 2> $null
-      7z x zlib-1.2.13.tar 2> $null
+      7z x zlib-1.3.1.tar 2> $null
-      cd zlib-1.2.13
+      cd zlib-1.3.1
 
       md build
       md prefix
@@ -34,7 +34,7 @@ build_script:
 
       cmake `
           -G $env:msvc `
-          -D CMAKE_INSTALL_PREFIX="$env:APPVEYOR_BUILD_FOLDER\zlib-1.2.13\prefix" `
+          -D CMAKE_INSTALL_PREFIX="$env:APPVEYOR_BUILD_FOLDER\zlib-1.3.1\prefix" `
           ..
       if ($LastExitCode -ne 0) { exit $LastExitCode }
 
@@ -52,7 +52,7 @@ build_script:
           -D MSGPACK_BUILD_EXAMPLES=ON `
           -D MSGPACK_BUILD_TESTS=ON `
           -D CMAKE_EXE_LINKER_FLAGS=/LIBPATH:"$env:boost_prefix\$env:boost_subdir" `
-          -D CMAKE_PREFIX_PATH="$env:boost_prefix;$env:APPVEYOR_BUILD_FOLDER\zlib-1.2.13\prefix" `
+          -D CMAKE_PREFIX_PATH="$env:boost_prefix;$env:APPVEYOR_BUILD_FOLDER\zlib-1.3.1\prefix" `
           -D CMAKE_INSTALL_PREFIX="$env:APPVEYOR_BUILD_FOLDER\prefix" `
           -D CMAKE_CXX_FLAGS="/D_VARIADIC_MAX=10 /EHsc /DBOOST_ALL_DYN_LINK" `
           ..
@@ -62,5 +62,5 @@ build_script:
       if ($LastExitCode -ne 0) { exit $LastExitCode }
 
 test_script:
-- set PATH=%PATH%;%APPVEYOR_BUILD_FOLDER%\zlib-1.2.13\build\Release;%APPVEYOR_BUILD_FOLDER%\build\release;%boost_prefix%\%boost_subdir%
+- set PATH=%PATH%;%APPVEYOR_BUILD_FOLDER%\zlib-1.3.1\build\Release;%APPVEYOR_BUILD_FOLDER%\build\release;%boost_prefix%\%boost_subdir%
 - ctest -VV -C Release

ci/build_cmake.sh

@@ -21,6 +21,7 @@ cmake \
     -D MSGPACK_CHAR_SIGN=${CHAR_SIGN} \
     -D MSGPACK_DEFAULT_API_VERSION=${API_VERSION} \
     -D MSGPACK_USE_X3_PARSE=${X3_PARSE} \
+    -D MSGPACK_USE_STD_VARIANT_ADAPTOR=${STD_VARIANT_ADAPTOR} \
     -D CMAKE_CXX_FLAGS="${CXXFLAGS} ${ARCH_FLAG}" \
     -D CMAKE_INSTALL_PREFIX=$prefix_dir \
     -B $build_dir \

example/boost/CMakeLists.txt

@@ -1,4 +1,4 @@
-FIND_PACKAGE (Boost REQUIRED COMPONENTS system)
+FIND_PACKAGE (Boost REQUIRED)
 FIND_PACKAGE (Threads REQUIRED)
 FIND_PACKAGE (ZLIB REQUIRED)
 
@@ -22,7 +22,6 @@ FOREACH (source_file ${exec_PROGRAMS})
     )
     TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
         msgpack-cxx
-        Boost::system
         Threads::Threads
     )
     IF (ZLIB_FOUND)

example/x3/CMakeLists.txt

@@ -1,5 +1,5 @@
 IF (MSGPACK_USE_X3_PARSE AND MSGPACK_DEFAULT_API_VERSION VERSION_GREATER 1)
-    FIND_PACKAGE (Boost REQUIRED COMPONENTS context system)
+    FIND_PACKAGE (Boost REQUIRED COMPONENTS context)
     FIND_PACKAGE (Threads REQUIRED)
 
     LIST (APPEND exec_PROGRAMS
@@ -42,7 +42,6 @@ IF (MSGPACK_USE_X3_PARSE AND MSGPACK_DEFAULT_API_VERSION VERSION_GREATER 1)
         TARGET_LINK_LIBRARIES (${source_file_we} PRIVATE
             msgpack-cxx
             Boost::context
-            Boost::system
             Threads::Threads
         )
         IF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")

fuzz/CMakeLists.txt

@@ -1,5 +1,5 @@
 FIND_PACKAGE (Threads REQUIRED)
-FIND_PACKAGE (Boost REQUIRED COMPONENTS system filesystem unit_test_framework)
+FIND_PACKAGE (Boost REQUIRED COMPONENTS filesystem unit_test_framework)
 
 LIST (APPEND check_PROGRAMS
     regression_runner.cpp
@@ -19,7 +19,6 @@ FOREACH (source_file ${check_PROGRAMS})
         msgpack-cxx
         Threads::Threads
         Boost::filesystem
-        Boost::system
         Boost::unit_test_framework
     )
 

include/msgpack/adaptor/cpp17/variant.hpp

@@ -0,0 +1,16 @@
+//
+// MessagePack for C++ static resolution routine
+//
+// Copyright (C) 2023 Uy Ha
+//
+//    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)
+//
+
+#ifndef MSGPACK_TYPE_CPP17_VARIANT_HPP
+#define MSGPACK_TYPE_CPP17_VARIANT_HPP
+
+#include "msgpack/v1/adaptor/cpp17/variant.hpp"
+
+#endif // MSGPACK_TYPE_CPP17_VARIANT_HPP

include/msgpack/type.hpp

@@ -37,9 +37,7 @@
 #include "adaptor/cpp11/array_char.hpp"
 #include "adaptor/cpp11/array_unsigned_char.hpp"
 
-#if !defined(MSGPACK_NO_BOOST)
 #include "adaptor/cpp11/chrono.hpp"
-#endif // !defined(MSGPACK_NO_BOOST)
 
 #include "adaptor/cpp11/forward_list.hpp"
 #include "adaptor/cpp11/reference_wrapper.hpp"
@@ -63,6 +61,10 @@
 #include "adaptor/cpp17/carray_byte.hpp"
 #include "adaptor/cpp17/vector_byte.hpp"
 
+#if MSGPACK_HAS_INCLUDE(<variant>)
+#include "adaptor/cpp17/variant.hpp"
+#endif // MSGPACK_HAS_INCLUDE(<variant>)
+
 #if MSGPACK_HAS_INCLUDE(<span>)
 #include "adaptor/cpp20/span.hpp"
 #endif // MSGPACK_HAS_INCLUDE(<span>)

include/msgpack/v1/adaptor/boost/msgpack_variant.hpp

@@ -122,6 +122,12 @@ struct basic_variant :
         int_init(v);
     }
     basic_variant(unsigned long long v):base(uint64_t(v)) {}
+    basic_variant(float v) {
+        double_init(v);
+    }
+    basic_variant(double v) {
+        double_init(v);
+    }
 
     bool is_nil() const {
         return boost::get<msgpack::type::nil_t>(this) != MSGPACK_NULLPTR;
@@ -177,71 +183,50 @@ struct basic_variant :
     int64_t as_int64_t() const {
         return boost::get<int64_t>(*this);
     }
-    int64_t& as_int64_t() {
-        return boost::get<int64_t>(*this);
-    }
     uint64_t as_uint64_t() const {
         return boost::get<uint64_t>(*this);
     }
-    uint64_t& as_uint64_t() {
-        return boost::get<uint64_t>(*this);
-    }
     double as_double() const {
-        return boost::get<double>(*this);
+        if (is_double()) {
-    }
+            return boost::get<double>(*this);
-    double& as_double() {
+        }
-        return boost::get<double>(*this);
+        if (is_int64_t()) {
+            return static_cast<double>(boost::get<int64_t>(*this));
+        }
+        if (is_uint64_t()) {
+            return static_cast<double>(boost::get<uint64_t>(*this));
+        }
+        throw msgpack::type_error();
     }
     std::string const& as_string() const {
         return boost::get<std::string>(*this);
     }
-    std::string& as_string() {
-        return boost::get<std::string>(*this);
-    }
 #if (BOOST_VERSION / 100000) >= 1 && ((BOOST_VERSION / 100) % 1000) >= 53
     boost::string_ref const& as_boost_string_ref() const {
         return boost::get<boost::string_ref>(*this);
     }
-    boost::string_ref& as_boost_string_ref() {
-        return boost::get<boost::string_ref>(*this);
-    }
 #endif // (BOOST_VERSION / 100000) >= 1 && ((BOOST_VERSION / 100) % 1000) >= 53
     std::vector<char> const& as_vector_char() const {
         return boost::get<std::vector<char> >(*this);
     }
-    std::vector<char>& as_vector_char() {
-        return boost::get<std::vector<char> >(*this);
-    }
     raw_ref const& as_raw_ref() const {
         return boost::get<raw_ref>(*this);
     }
     ext const& as_ext() const {
         return boost::get<ext>(*this);
     }
-    ext& as_ext() {
-        return boost::get<ext>(*this);
-    }
     ext_ref const& as_ext_ref() const {
         return boost::get<ext_ref>(*this);
     }
     std::vector<basic_variant<STR, BIN, EXT> > const& as_vector() const {
         return boost::get<std::vector<basic_variant<STR, BIN, EXT> > >(*this);
     }
-    std::vector<basic_variant<STR, BIN, EXT> >& as_vector() {
-        return boost::get<std::vector<basic_variant<STR, BIN, EXT> > >(*this);
-    }
     std::map<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > const& as_map() const {
         return boost::get<std::map<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > >(*this);
     }
-    std::map<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> >& as_map() {
-        return boost::get<std::map<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > >(*this);
-    }
     std::multimap<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > const& as_multimap() const {
         return boost::get<std::multimap<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > >(*this);
     }
-    std::multimap<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> >& as_multimap() {
-        return boost::get<std::multimap<basic_variant<STR, BIN, EXT>, basic_variant<STR, BIN, EXT> > >(*this);
-    }
 private:
     template <typename T>
     void int_init(T v) {
@@ -252,6 +237,19 @@ private:
             static_cast<base&>(*this) = uint64_t(v);
         }
     }
+    void double_init(double v) {
+        if (v == v) { // check for nan
+            if (v >= 0 && v <= double(std::numeric_limits<uint64_t>::max()) && v == double(uint64_t(v))) {
+                static_cast<base&>(*this) = uint64_t(v);
+                return;
+            }
+            else if (v < 0 && v >= double(std::numeric_limits<int64_t>::min()) && v == double(int64_t(v))) {
+                static_cast<base&>(*this) = int64_t(v);
+                return;
+            }
+        }
+        static_cast<base&>(*this) = v;
+    }
 };
 
 template <typename STR, typename BIN, typename EXT>

include/msgpack/v1/adaptor/cpp11/chrono.hpp

@@ -11,17 +11,14 @@
 #ifndef MSGPACK_V1_TYPE_CPP11_CHRONO_HPP
 #define MSGPACK_V1_TYPE_CPP11_CHRONO_HPP
 
-#if !defined(MSGPACK_NO_BOOST)
-
 #include "msgpack/versioning.hpp"
 #include "msgpack/adaptor/adaptor_base.hpp"
 #include "msgpack/object.hpp"
 #include "msgpack/adaptor/check_container_size.hpp"
 
+#include <limits>
 #include <chrono>
 
-#include <boost/numeric/conversion/cast.hpp>
-
 namespace msgpack {
 
 /// @cond
@@ -30,6 +27,113 @@ MSGPACK_API_VERSION_NAMESPACE(v1) {
 
 namespace adaptor {
 
+namespace detail {
+template <
+    typename Target,
+    typename Source,
+    bool target_is_signed = std::is_signed<Target>::value,
+    bool source_is_signed = std::is_signed<Source>::value,
+    typename = typename std::enable_if<
+                   std::is_integral<Target>::value &&
+                   std::is_integral<Source>::value
+               >::type
+>
+struct would_underflow {
+    // The default case includes the cases that Source being unsigned, and since Source
+    // is unsigned, no underflow can happen
+    would_underflow(Source) : value{false} {}
+    bool value;
+};
+
+template <typename Target, typename Source>
+struct would_underflow<Target, Source, false, true> {
+    // When Source is signed and Target is unsigned, we only need to compare with 0 to
+    // detect underflow, this works correctly and also avoids warnings from the compiler
+    would_underflow(Source source) : value{source < 0} {}
+    bool value;
+};
+template <typename Target, typename Source>
+struct would_underflow<Target, Source, true, true> {
+    // When Source and Target are signed, the promotion rules apply sensibly so we do
+    // not need to do anything
+    would_underflow(Source source)
+        : value{source < std::numeric_limits<Target>::min()} {}
+    bool value;
+};
+
+template <
+    typename Target,
+    typename Source,
+    bool target_is_signed = std::is_signed<Target>::value,
+    bool source_is_signed = std::is_signed<Source>::value,
+    typename = typename std::enable_if<
+                   std::is_integral<Target>::value &&
+                   std::is_integral<Source>::value
+               >::type
+>
+struct would_overflow {
+    // The default case is Source and Target having the same signedness, the promotion
+    // rule also apply sensibly here so nothing special needs to be done
+    would_overflow(Source source)
+        : value{source > std::numeric_limits<Target>::max()} {}
+    bool value;
+};
+template <typename Target, typename Source>
+struct would_overflow <Target, Source, false, true> {
+    // When Target is unsigned and Source is signed, we cannot rely on the promotion
+    // rule.
+    would_overflow(Source source)
+        : value{
+              sizeof(Target) >= sizeof(Source)
+              // Given Source is signed, Target being unsigned and having at least the
+              // same size makes impossible to overflow
+              ? false
+              // Source being larger than Target makes it safe to cast the maximum value
+              // of Target to Source
+              : source > static_cast<Source>(std::numeric_limits<Target>::max())
+          } {}
+    bool value;
+};
+template <typename Target, typename Source>
+struct would_overflow <Target, Source, true, false> {
+    // When Target is signed and Source is unsigned, we cannot rely on the promotion
+    // rule.
+    would_overflow(Source source)
+        : value{
+              sizeof(Target) > sizeof(Source)
+              // Target being larger than Source makes it impossible to overflow
+              ? false
+              // Source being unsigned and having at least the size of Target makes it
+              // safe to cast the maximum value of Target to Source
+              : source > static_cast<Source>(std::numeric_limits<Target>::max())
+          } {}
+    bool value;
+};
+
+template <
+    typename Target,
+    typename Source,
+    typename = typename std::enable_if<
+                   std::is_integral<Target>::value &&
+                   std::is_integral<Source>::value
+               >::type
+>
+Target integral_cast(Source source) {
+    if (would_underflow<Target, Source>(source).value) {
+        throw std::underflow_error{
+            "casting from Source to Target causes an underflow error"
+        };
+    }
+    if(would_overflow<Target, Source>(source).value) {
+        throw std::overflow_error{
+            "casting from Source to Target causes an overflow error"
+        };
+    }
+
+    return static_cast<Target>(source);
+}
+} // namespace detail
+
 template <typename Clock, typename Duration>
 struct as<std::chrono::time_point<Clock, Duration>> {
     typename std::chrono::time_point<Clock, Duration> operator()(msgpack::object const& o) const {
@@ -45,7 +149,7 @@ struct as<std::chrono::time_point<Clock, Duration>> {
         case 8: {
             uint64_t value;
             _msgpack_load64(uint64_t, o.via.ext.data(), &value);
-            uint32_t nanosec = boost::numeric_cast<uint32_t>(value >> 34);
+            uint32_t nanosec = detail::integral_cast<uint32_t>(value >> 34);
             uint64_t sec = value & 0x00000003ffffffffLL;
             tp += std::chrono::duration_cast<Duration>(
                 std::chrono::nanoseconds(nanosec));
@@ -69,7 +173,7 @@ struct as<std::chrono::time_point<Clock, Duration>> {
                 else {
                     ++sec;
                     tp += std::chrono::seconds(sec);
-                    int64_t ns = boost::numeric_cast<int64_t>(nanosec) - 1000000000L;
+                    int64_t ns = detail::integral_cast<int64_t>(nanosec) - 1000000000L;
                     tp += std::chrono::duration_cast<Duration>(
                         std::chrono::nanoseconds(ns));
                 }
@@ -98,7 +202,7 @@ struct convert<std::chrono::time_point<Clock, Duration>> {
         case 8: {
             uint64_t value;
             _msgpack_load64(uint64_t, o.via.ext.data(), &value);
-            uint32_t nanosec = boost::numeric_cast<uint32_t>(value >> 34);
+            uint32_t nanosec = detail::integral_cast<uint32_t>(value >> 34);
             uint64_t sec = value & 0x00000003ffffffffLL;
             tp += std::chrono::duration_cast<Duration>(
                 std::chrono::nanoseconds(nanosec));
@@ -123,7 +227,7 @@ struct convert<std::chrono::time_point<Clock, Duration>> {
                 else {
                     ++sec;
                     tp += std::chrono::seconds(sec);
-                    int64_t ns = boost::numeric_cast<int64_t>(nanosec) - 1000000000L;
+                    int64_t ns = detail::integral_cast<int64_t>(nanosec) - 1000000000L;
                     tp += std::chrono::duration_cast<Duration>(
                         std::chrono::nanoseconds(ns));
                 }
@@ -142,7 +246,7 @@ template <typename Clock, typename Duration>
 struct pack<std::chrono::time_point<Clock, Duration>> {
     template <typename Stream>
     msgpack::packer<Stream>& operator()(msgpack::packer<Stream>& o, std::chrono::time_point<Clock, Duration> const& v) const {
-        int64_t count = boost::numeric_cast<int64_t>(v.time_since_epoch().count());
+        int64_t count = detail::integral_cast<int64_t>(v.time_since_epoch().count());
         int64_t nano_num =
             Duration::period::ratio::num *
             (1000000000L / Duration::period::ratio::den);
@@ -158,11 +262,11 @@ struct pack<std::chrono::time_point<Clock, Duration>> {
             / Duration::period::ratio::den;
 
         if ((sec >> 34) == 0) {
-            uint64_t data64 = (boost::numeric_cast<uint64_t>(nanosec) << 34) | boost::numeric_cast<uint64_t>(sec);
+            uint64_t data64 = (detail::integral_cast<uint64_t>(nanosec) << 34) | detail::integral_cast<uint64_t>(sec);
             if ((data64 & 0xffffffff00000000L) == 0) {
                 // timestamp 32
                 o.pack_ext(4, -1);
-                uint32_t data32 = boost::numeric_cast<uint32_t>(data64);
+                uint32_t data32 = detail::integral_cast<uint32_t>(data64);
                 char buf[4];
                 _msgpack_store32(buf, data32);
                 o.pack_ext_body(buf, 4);
@@ -181,7 +285,7 @@ struct pack<std::chrono::time_point<Clock, Duration>> {
             char buf[12];
 
 
-            _msgpack_store32(&buf[0], boost::numeric_cast<uint32_t>(nanosec));
+            _msgpack_store32(&buf[0], detail::integral_cast<uint32_t>(nanosec));
             _msgpack_store64(&buf[4], sec);
             o.pack_ext_body(buf, 12);
         }
@@ -192,7 +296,7 @@ struct pack<std::chrono::time_point<Clock, Duration>> {
 template <typename Clock, typename Duration>
 struct object_with_zone<std::chrono::time_point<Clock, Duration>> {
     void operator()(msgpack::object::with_zone& o, const std::chrono::time_point<Clock, Duration>& v) const {
-        int64_t count = boost::numeric_cast<int64_t>(v.time_since_epoch().count());
+        int64_t count = detail::integral_cast<int64_t>(v.time_since_epoch().count());
 
         int64_t nano_num =
             Duration::period::ratio::num *
@@ -208,14 +312,14 @@ struct object_with_zone<std::chrono::time_point<Clock, Duration>> {
             * Duration::period::ratio::num
             / Duration::period::ratio::den;
         if ((sec >> 34) == 0) {
-            uint64_t data64 = (boost::numeric_cast<uint64_t>(nanosec) << 34) | boost::numeric_cast<uint64_t>(sec);
+            uint64_t data64 = (detail::integral_cast<uint64_t>(nanosec) << 34) | detail::integral_cast<uint64_t>(sec);
             if ((data64 & 0xffffffff00000000L) == 0) {
                 // timestamp 32
                 o.type = msgpack::type::EXT;
                 o.via.ext.size = 4;
                 char* p = static_cast<char*>(o.zone.allocate_no_align(o.via.ext.size + 1));
                 p[0] = static_cast<char>(-1);
-                uint32_t data32 = boost::numeric_cast<uint32_t>(data64);
+                uint32_t data32 = detail::integral_cast<uint32_t>(data64);
                 _msgpack_store32(&p[1], data32);
                 o.via.ext.ptr = p;
             }
@@ -235,7 +339,7 @@ struct object_with_zone<std::chrono::time_point<Clock, Duration>> {
             o.via.ext.size = 12;
             char* p = static_cast<char*>(o.zone.allocate_no_align(o.via.ext.size + 1));
             p[0] = static_cast<char>(-1);
-            _msgpack_store32(&p[1], boost::numeric_cast<uint32_t>(nanosec));
+            _msgpack_store32(&p[1], detail::integral_cast<uint32_t>(nanosec));
             _msgpack_store64(&p[1 + 4], sec);
             o.via.ext.ptr = p;
         }
@@ -250,6 +354,4 @@ struct object_with_zone<std::chrono::time_point<Clock, Duration>> {
 
 } // namespace msgpack
 
-#endif // !defined(MSGPACK_NO_BOOST)
-
 #endif // MSGPACK_V1_TYPE_CPP11_CHRONO_HPP

include/msgpack/v1/adaptor/cpp17/variant.hpp

@@ -0,0 +1,151 @@
+//
+// MessagePack for C++ static resolution routine
+//
+// Copyright (C) 2023 Uy Ha
+//
+//    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)
+//
+
+#ifndef MSGPACK_V1_TYPE_VARIANT_HPP
+#define MSGPACK_V1_TYPE_VARIANT_HPP
+
+#if defined(MSGPACK_USE_STD_VARIANT_ADAPTOR)
+
+#include "msgpack/cpp_version.hpp"
+
+#if MSGPACK_CPP_VERSION >= 201703
+
+#include "msgpack/adaptor/adaptor_base.hpp"
+#include "msgpack/object.hpp"
+#include "msgpack/versioning.hpp"
+
+#include <variant>
+
+namespace msgpack {
+MSGPACK_API_VERSION_NAMESPACE(v1) {
+namespace adaptor {
+namespace detail {
+template <
+    typename Variant,
+    typename T,
+    typename... Ts,
+    std::size_t current_index,
+    std::size_t... indices
+>
+Variant construct_variant(
+    std::size_t index,
+    msgpack::object& object,
+    std::index_sequence<current_index, indices...>
+) {
+    if constexpr(sizeof...(Ts) == 0) {
+        return Variant{std::in_place_index<current_index>, object.as<T>()};
+    }
+    else {
+        if (index == current_index) {
+            return Variant{std::in_place_index<current_index>, object.as<T>()};
+        }
+        return construct_variant<Variant, Ts...>(
+            index,
+            object,
+            std::index_sequence<indices...>()
+        );
+    }
+}
+
+struct object_variant_overload {
+    object_variant_overload(msgpack::object& obj, msgpack::zone& zone)
+        : obj{obj}
+        , zone{zone} {}
+
+    template<typename T>
+    void operator()(T const& value) {
+        obj = msgpack::object(value, zone);
+    }
+
+    msgpack::object& obj;
+    msgpack::zone& zone;
+};
+} // namespace detail
+
+template <typename... Ts>
+struct as<std::variant<Ts...>, typename std::enable_if<(msgpack::has_as<Ts>::value && ...)>::type> {
+    std::variant<Ts...> operator()(msgpack::object const& o) const {
+        if (  o.type != msgpack::type::ARRAY
+           || o.via.array.size != 2
+           || o.via.array.ptr[0].type != msgpack::type::POSITIVE_INTEGER
+           || o.via.array.ptr[0].via.u64 >= sizeof...(Ts)) {
+            throw msgpack::type_error{};
+        }
+
+        return detail::construct_variant<std::variant<Ts...>, Ts...>(
+            o.via.array.ptr[0].as<std::size_t>(),
+            o.via.array.ptr[1],
+            std::make_index_sequence<sizeof...(Ts)>()
+        );
+    }
+};
+
+template<typename... Ts>
+struct convert<std::variant<Ts...>> {
+    msgpack::object const& operator()(msgpack::object const& o, std::variant<Ts...>& v) const {
+        if (  o.type != msgpack::type::ARRAY
+           || o.via.array.size != 2
+           || o.via.array.ptr[0].type != msgpack::type::POSITIVE_INTEGER
+           || o.via.array.ptr[0].via.u64 >= sizeof...(Ts)) {
+            throw msgpack::type_error{};
+        }
+
+        v =  detail::construct_variant<std::variant<Ts...>, Ts...>(
+            o.via.array.ptr[0].as<std::size_t>(),
+            o.via.array.ptr[1],
+            std::make_index_sequence<sizeof...(Ts)>()
+        );
+        return o;
+    }
+};
+
+template <typename... Ts>
+struct pack<std::variant<Ts...>>{
+    template<typename Stream>
+    msgpack::packer<Stream>& operator()(
+        msgpack::packer<Stream>& o,
+        std::variant<Ts...> const& v
+    ) const {
+        o.pack_array(2);
+        o.pack_uint64(v.index());
+        std::visit([&o](auto const& value){o.pack(value);}, v);
+        return o;
+    }
+};
+
+
+template<typename... Ts>
+struct object_with_zone<std::variant<Ts...>> {
+    void operator()(
+        msgpack::object::with_zone& o,
+        std::variant<Ts...> const& v
+    ) const {
+        msgpack::object *p =
+            static_cast<msgpack::object *>(
+                o.zone.allocate_align(
+                    sizeof(msgpack::object) * 2,
+                    MSGPACK_ZONE_ALIGNOF(msgpack::object)
+                )
+            );
+
+        o.type = msgpack::type::ARRAY;
+        o.via.array.size = 2;
+        o.via.array.ptr = p;
+        o.via.array.ptr[0]= msgpack::object(v.index(), o.zone);
+        std::visit(detail::object_variant_overload(o.via.array.ptr[1], o.zone), v);
+    }
+};
+} // namespace adaptor
+}
+} // namespace msgpack
+
+#endif // MSGPACK_CPP_VERSION >= 201703
+#endif // defined(MSGPACK_USE_STD_VARIANT_ADAPTOR)
+#endif // MSGPACK_V1_TYPE_VARIANT_HPP

include/msgpack/v1/object_fwd.hpp

@@ -53,16 +53,16 @@ template <typename T>
 struct has_as {
 private:
     template <typename U>
-    static auto check(U*) ->
+    static auto check_(U*) ->
         // Check v1 specialization
         typename std::is_same<
             decltype(adaptor::as<U>()(std::declval<msgpack::object>())),
             T
         >::type;
     template <typename...>
-    static std::false_type check(...);
+    static std::false_type check_(...);
 public:
-    using type = decltype(check<T>(MSGPACK_NULLPTR));
+    using type = decltype(check_<T>(MSGPACK_NULLPTR));
     static constexpr bool value = type::value;
 };
 

include/msgpack/v1/pack.hpp

@@ -1138,11 +1138,11 @@ inline packer<Stream>& packer<Stream>::pack_unsigned_long_long(unsigned long lon
 template <typename Stream>
 inline packer<Stream>& packer<Stream>::pack_float(float d)
 {
-    if(d == d) { // check for nan 
+    if(d == d) { // check for nan
         // compare d to limits to avoid undefined behaviour
         if(d >= 0 && d <= float(std::numeric_limits<uint64_t>::max()) && d == float(uint64_t(d))) {
             pack_imp_uint64(uint64_t(d));
-            return *this;        
+            return *this;
         } else if(d < 0 && d >= float(std::numeric_limits<int64_t>::min()) && d == float(int64_t(d))) {
             pack_imp_int64(int64_t(d));
             return *this;
@@ -1160,11 +1160,11 @@ inline packer<Stream>& packer<Stream>::pack_float(float d)
 template <typename Stream>
 inline packer<Stream>& packer<Stream>::pack_double(double d)
 {
-    if(d == d) { // check for nan 
+    if(d == d) { // check for nan
         // compare d to limits to avoid undefined behaviour
         if(d >= 0 && d <= double(std::numeric_limits<uint64_t>::max()) && d == double(uint64_t(d))) {
             pack_imp_uint64(uint64_t(d));
-            return *this;        
+            return *this;
         } else if(d < 0 && d >= double(std::numeric_limits<int64_t>::min()) && d == double(int64_t(d))) {
             pack_imp_int64(int64_t(d));
             return *this;

include/msgpack/v2/object_fwd.hpp

@@ -79,7 +79,7 @@ template <typename T>
 struct has_as {
 private:
     template <typename U>
-    static auto check(U*) ->
+    static auto check_(U*) ->
         typename std::enable_if<
             // check v2 specialization
             std::is_same<
@@ -92,9 +92,9 @@ private:
             std::true_type
         >::type;
     template <typename...>
-    static std::false_type check(...);
+    static std::false_type check_(...);
 public:
-    using type = decltype(check<T>(MSGPACK_NULLPTR));
+    using type = decltype(check_<T>(MSGPACK_NULLPTR));
     static constexpr bool value = type::value;
 };
 

include/msgpack/v3/object_fwd.hpp

@@ -36,7 +36,7 @@ template <typename T>
 struct has_as {
 private:
     template <typename U>
-    static auto check(U*) ->
+    static auto check_(U*) ->
         typename std::enable_if<
             // check v3 specialization
             std::is_same<
@@ -52,9 +52,9 @@ private:
             std::true_type
         >::type;
     template <typename...>
-    static std::false_type check(...);
+    static std::false_type check_(...);
 public:
-    using type = decltype(check<T>(MSGPACK_NULLPTR));
+    using type = decltype(check_<T>(MSGPACK_NULLPTR));
     static constexpr bool value = type::value;
 };
 

include/msgpack/version_master.hpp

@@ -1,3 +1,3 @@
 #define MSGPACK_VERSION_MAJOR    6
-#define MSGPACK_VERSION_MINOR    0
+#define MSGPACK_VERSION_MINOR    1
-#define MSGPACK_VERSION_REVISION 0
+#define MSGPACK_VERSION_REVISION 1

test/CMakeLists.txt

@@ -1,6 +1,6 @@
 FIND_PACKAGE (Threads REQUIRED)
 FIND_PACKAGE (ZLIB)
-FIND_PACKAGE (Boost REQUIRED COMPONENTS unit_test_framework system)
+FIND_PACKAGE (Boost REQUIRED COMPONENTS unit_test_framework)
 
 LIST (APPEND check_PROGRAMS
     array_ref.cpp
@@ -79,7 +79,6 @@ FOREACH (source_file ${check_PROGRAMS})
 
     TARGET_LINK_LIBRARIES (${source_file_we}
         msgpack-cxx
-        Boost::system
         Boost::unit_test_framework
         Threads::Threads
         ZLIB::ZLIB

test/boost_variant.cpp

@@ -264,7 +264,7 @@ BOOST_AUTO_TEST_CASE(pack_convert_variant_float)
     BOOST_CHECK(val2.is_double());
     BOOST_CHECK(fabs(12.34 - val2.as_double()) <= kEPS);
     BOOST_CHECK_NO_THROW(boost::get<double>(val2));
-    BOOST_CHECK(fabs(val2.as_double() - val2.as_double()) <= kEPS);
+    BOOST_CHECK(fabs(val1.as_double() - val2.as_double()) <= kEPS);
 }
 
 BOOST_AUTO_TEST_CASE(object_variant_float)
@@ -277,7 +277,8 @@ BOOST_AUTO_TEST_CASE(object_variant_float)
     BOOST_CHECK(val2.is_double());
     BOOST_CHECK(fabs(12.34 - val2.as_double()) <= kEPS);
     BOOST_CHECK_NO_THROW(boost::get<double>(val2));
-    BOOST_CHECK(fabs(val2.as_double() - val2.as_double()) <= kEPS);
+    BOOST_CHECK(fabs(val1.as_double() - val2.as_double()) <= kEPS);
+    BOOST_CHECK(val1 == val2);
 }
 
 BOOST_AUTO_TEST_CASE(object_with_zone_variant_float)
@@ -291,7 +292,116 @@ BOOST_AUTO_TEST_CASE(object_with_zone_variant_float)
     BOOST_CHECK(val2.is_double());
     BOOST_CHECK(fabs(12.34 - val2.as_double()) <= kEPS);
     BOOST_CHECK_NO_THROW(boost::get<double>(val2));
-    BOOST_CHECK(fabs(val2.as_double() - val2.as_double()) <= kEPS);
+    BOOST_CHECK(fabs(val1.as_double() - val2.as_double()) <= kEPS);
+    BOOST_CHECK(val1 == val2);
+}
+
+BOOST_AUTO_TEST_CASE(pack_convert_variant_float_zero_atdp_positive)
+{
+    std::stringstream ss;
+    msgpack::type::variant val1 = 12.0;
+    BOOST_CHECK(val1.is_uint64_t());
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), 12);
+    BOOST_CHECK(fabs(12.0 - val1.as_double()) <= kEPS);
+
+    msgpack::pack(ss, val1);
+
+    std::string const& str = ss.str();
+    msgpack::object_handle oh =
+        msgpack::unpack(str.data(), str.size());
+    msgpack::type::variant val2 = oh.get().as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_uint64_t());
+    BOOST_CHECK_EQUAL(val2.as_uint64_t(), 12);
+    BOOST_CHECK_NO_THROW(boost::get<uint64_t>(val2));
+    BOOST_CHECK(fabs(12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), val2.as_uint64_t());
+}
+
+BOOST_AUTO_TEST_CASE(object_variant_float_zero_atdp_positive)
+{
+    msgpack::type::variant val1 = 12.0;
+    BOOST_CHECK(val1.is_uint64_t());
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), 12);
+    BOOST_CHECK(fabs(12.0 - val1.as_double()) <= kEPS);
+    msgpack::object obj(val1);
+    msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_uint64_t());
+    BOOST_CHECK_EQUAL(val2.as_uint64_t(), 12);
+    BOOST_CHECK_NO_THROW(boost::get<uint64_t>(val2));
+    BOOST_CHECK(fabs(12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), val2.as_uint64_t());
+    BOOST_CHECK(val1 == val2);
+}
+
+BOOST_AUTO_TEST_CASE(object_with_zone_variant_float_zero_atdp_positive)
+{
+    msgpack::zone z;
+    msgpack::type::variant val1 = 12.0;
+    BOOST_CHECK(val1.is_uint64_t());
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), 12);
+    BOOST_CHECK(fabs(12.0 - val1.as_double()) <= kEPS);
+    msgpack::object obj(val1, z);
+    msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_uint64_t());
+    BOOST_CHECK_EQUAL(val2.as_uint64_t(), 12);
+    BOOST_CHECK_NO_THROW(boost::get<uint64_t>(val2));
+    BOOST_CHECK_EQUAL(val1.as_uint64_t(), val2.as_uint64_t());
+    BOOST_CHECK(fabs(12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK(val1 == val2);
+}
+
+BOOST_AUTO_TEST_CASE(pack_convert_variant_float_zero_atdp_negative)
+{
+    std::stringstream ss;
+    msgpack::type::variant val1 = -12.0;
+    BOOST_CHECK(val1.is_int64_t());
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), -12);
+    BOOST_CHECK(fabs(-12.0 - val1.as_double()) <= kEPS);
+
+    msgpack::pack(ss, val1);
+
+    std::string const& str = ss.str();
+    msgpack::object_handle oh =
+        msgpack::unpack(str.data(), str.size());
+    msgpack::type::variant val2 = oh.get().as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_int64_t());
+    BOOST_CHECK_EQUAL(val2.as_int64_t(), -12);
+    BOOST_CHECK_NO_THROW(boost::get<int64_t>(val2));
+    BOOST_CHECK(fabs(-12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), val2.as_int64_t());
+}
+
+BOOST_AUTO_TEST_CASE(object_variant_float_zero_atdp_negative)
+{
+    msgpack::type::variant val1 = -12.0;
+    BOOST_CHECK(val1.is_int64_t());
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), -12);
+    BOOST_CHECK(fabs(-12.0 - val1.as_double()) <= kEPS);
+    msgpack::object obj(val1);
+    msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_int64_t());
+    BOOST_CHECK_EQUAL(val2.as_int64_t(), -12);
+    BOOST_CHECK_NO_THROW(boost::get<int64_t>(val2));
+    BOOST_CHECK(fabs(-12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), val2.as_int64_t());
+    BOOST_CHECK(val1 == val2);
+}
+
+BOOST_AUTO_TEST_CASE(object_with_zone_variant_float_zero_atdp_negative)
+{
+    msgpack::zone z;
+    msgpack::type::variant val1 = -12.0;
+    BOOST_CHECK(val1.is_int64_t());
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), -12);
+    BOOST_CHECK(fabs(-12.0 - val1.as_double()) <= kEPS);
+    msgpack::object obj(val1, z);
+    msgpack::type::variant val2 = obj.as<msgpack::type::variant>();
+    BOOST_CHECK(val2.is_int64_t());
+    BOOST_CHECK_EQUAL(val2.as_int64_t(), -12);
+    BOOST_CHECK_NO_THROW(boost::get<int64_t>(val2));
+    BOOST_CHECK(fabs(-12.0 - val2.as_double()) <= kEPS);
+    BOOST_CHECK_EQUAL(val1.as_int64_t(), val2.as_int64_t());
+    BOOST_CHECK(val1 == val2);
 }
 
 // str

test/msgpack_cpp11.cpp

@@ -252,6 +252,9 @@ struct equal_to : std::equal_to<Key> {
 template <class Key>
 struct set_allocator : std::allocator<Key> {
     using std::allocator<Key>::allocator;
+
+    template<class U>
+    struct rebind { using other = set_allocator<U>; };
 };
 
 // C++ named requirement Allocator implies that the first template type
@@ -262,6 +265,9 @@ struct set_allocator : std::allocator<Key> {
 template <typename KeyValuePair>
 struct map_allocator_impl : std::allocator<KeyValuePair> {
     using std::allocator<KeyValuePair>::allocator;
+
+    template<class U>
+    struct rebind { using other = map_allocator_impl<U>; };
 };
 
 template <class Key, class T>
@@ -270,6 +276,9 @@ using map_allocator = map_allocator_impl<std::pair<const Key, T>>;
 template <class T>
 struct allocator : std::allocator<T> {
     using std::allocator<T>::allocator;
+
+    template<class U>
+    struct rebind { using other = allocator<U>; };
 };
 
 } // namespace test
@@ -861,8 +870,6 @@ BOOST_AUTO_TEST_CASE(no_def_con_array_simple_buffer)
     BOOST_CHECK(val1 == val2);
 }
 
-#if !defined(MSGPACK_NO_BOOST)
-
 BOOST_AUTO_TEST_CASE(system_clock)
 {
     std::chrono::system_clock::time_point val1;
@@ -1428,8 +1435,6 @@ BOOST_AUTO_TEST_CASE(high_resolution_clock_impl_now)
     BOOST_CHECK(val1 == val3);
 }
 
-#endif // !defined(MSGPACK_NO_BOOST)
-
 
 BOOST_AUTO_TEST_CASE(timespec_pack_convert_zero)
 {

test/msgpack_cpp17.cpp

@@ -461,4 +461,52 @@ BOOST_AUTO_TEST_CASE(carray_byte_object_with_zone)
     }
 }
 
+#if defined(MSGPACK_USE_STD_VARIANT_ADAPTOR)
+
+BOOST_AUTO_TEST_CASE(variant_pack_unpack_as) {
+    std::stringstream ss;
+    std::variant<bool, int, float, double> val1{1.0};
+    msgpack::pack(ss, val1);
+    std::string const& str = ss.str();
+    msgpack::object_handle oh =
+        msgpack::unpack(str.data(), str.size());
+    std::variant<bool, int, float, double> val2 =
+        oh.get().as<std::variant<bool, int, float, double> >();
+    BOOST_CHECK(val1 == val2);
+    BOOST_CHECK_THROW((oh.get().as<std::variant<bool>>()), msgpack::type_error);
+
+    {
+      std::stringstream same_ss;
+      std::variant<int, float, int> same_expected{std::in_place_index<2>, 2};
+      msgpack::pack(same_ss, same_expected);
+      std::string const& same_str = same_ss.str();
+      msgpack::object_handle same_oh =
+          msgpack::unpack(same_str.data(), same_str.size());
+      std::variant<int, float, int> same_actual = same_oh->as<std::variant<int, float, int>>();
+      BOOST_CHECK(same_expected == same_actual);
+    }
+
+    {
+      std::stringstream same_ss;
+      std::variant<int, int> same_expected{std::in_place_index<1>, 2};
+      msgpack::pack(same_ss, same_expected);
+      std::string const& same_str = same_ss.str();
+      msgpack::object_handle same_oh =
+          msgpack::unpack(same_str.data(), same_str.size());
+      std::variant<int, int> same_actual = same_oh->as<std::variant<int, int>>();
+      BOOST_CHECK(same_expected == same_actual);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(variant_with_zone) {
+    msgpack::zone z;
+    std::variant<bool, int, float, double> val1{1.0};
+    msgpack::object obj(val1, z);
+    std::variant<bool, int, float, double> val2 = obj.as<std::variant<bool, int, float, double>>();
+    BOOST_CHECK(val1 == val2);
+    BOOST_CHECK_THROW((obj.as<std::variant<bool>>()), msgpack::type_error);
+}
+
+#endif // defined(MSGPACK_USE_STD_VARIANT_ADAPTOR)
+
 #endif // MSGPACK_CPP_VERSION >= 201703