Fix std::array<T,0> (#848)

* Fix std::array<T,0>

* Add unittests for std::array<T,0>

* update std::array

.github/workflows/ci-macos.yml

@@ -10,18 +10,18 @@ jobs:
         include:
           - CMAKE_OPTIONS: '-DWITH_WERROR=OFF -DSKIP_PORTABILITY_TEST=ON -DSKIP_PERFORMANCE_COMPARISON=ON'
             COMPILER: 'clang++'
-            XCODE_VERSION: 11
-            NAME: macos-latest-clang-xcode11
+            XCODE_VERSION: 15
+            NAME: macos-latest-clang-xcode15
 
           - CMAKE_OPTIONS: '-DWITH_WERROR=OFF -DSKIP_PORTABILITY_TEST=ON -DSKIP_PERFORMANCE_COMPARISON=ON'
             COMPILER: 'clang++'
-            XCODE_VERSION: 12
-            NAME: macos-latest-clang-xcode12
+            XCODE_VERSION: 16
+            NAME: macos-latest-clang-xcode16
     name: ${{ matrix.name }}
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - uses: maxim-lobanov/setup-xcode@v1
       with:

.github/workflows/ci.yml

@@ -4,7 +4,6 @@ on: [push, pull_request]
 jobs:
   test_cereal_linux:
     runs-on: ubuntu-latest
-    container: ${{ matrix.CONTAINER }}
     strategy:
       fail-fast: false
       matrix:
@@ -164,75 +163,75 @@ jobs:
     name: ${{ matrix.name }}
 
     steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-
+    - name: Check out the repo
+      uses: actions/checkout@v4
     - name: install deps and test
-      shell: bash
-      env:
-        CMAKE_OPTIONS: ${{ matrix.CMAKE_OPTIONS }}
-        COMPILER: ${{ matrix.COMPILER }}
-        EXTRA_APT_PACKAGES: ${{ matrix.EXTRA_APT_PACKAGES }}
-        LLVM_APT_SOURCE: ${{ matrix.LLVM_APT_SOURCE }}
-      run: |
-        set -ex
-        apt-get update -y
-        DEBIAN_FRONTEND=noninteractive TZ=America/Los_Angeles apt-get install -y software-properties-common wget python3-pip make apt-transport-https
+      uses: addnab/docker-run-action@v3
+      with:
+        image: ${{ matrix.CONTAINER }}
+        options: -v ${{ github.workspace }}:/var/workspace 
+        shell: bash
+        run: |
+          set -ex
+          apt-get update -y
+          DEBIAN_FRONTEND=noninteractive TZ=America/Los_Angeles apt-get install -y software-properties-common wget python3-pip make apt-transport-https
 
-        # Add apt repositories for older Ubuntu
-        . /etc/os-release
-        if [[ "${VERSION_ID}" == "16.04" ]]; then
-          add-apt-repository ppa:ubuntu-toolchain-r/test -y
-          add-apt-repository ppa:mhier/libboost-latest -y
-        fi
-
-        if [[ "${LLVM_APT_SOURCE}" != "" ]]; then
-          wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
-          add-apt-repository "${LLVM_APT_SOURCE}"
-        fi
-
-        apt-get update -y
-
-        # Install apt packages
-        apt-get install libboost-serialization-dev libboost-dev ${EXTRA_APT_PACKAGES} -y
-        pip3 install cmake
-
-        # Set compiler and env variables
-        export CXX=${COMPILER}
-        ${CXX} --version
-        DEPS_DIR="${PWD}/deps"
-        mkdir -p "${DEPS_DIR}"
-        pushd "${DEPS_DIR}"
-        JOBS=2
-
-        # Install the right version of libc++
-        LLVM_INSTALL=${DEPS_DIR}/llvm/install
-        # if in linux and compiler clang and llvm not installed
-        if [[ "${CXX}" == "clang"* && -n "$(ls -A ${LLVM_INSTALL})" ]]; then
-          if   [[ "${CXX}" == "clang++-3.6" ]]; then LLVM_VERSION="3.6.2";
-          elif [[ "${CXX}" == "clang++-3.7" ]]; then LLVM_VERSION="3.7.1";
-          elif [[ "${CXX}" == "clang++-3.8" ]]; then LLVM_VERSION="3.8.1";
-          elif [[ "${CXX}" == "clang++-3.9" ]]; then LLVM_VERSION="3.9.1";
+          # Add apt repositories for older Ubuntu
+          . /etc/os-release
+          if [[ "${VERSION_ID}" == "16.04" ]]; then
+            add-apt-repository ppa:ubuntu-toolchain-r/test -y
+            add-apt-repository ppa:mhier/libboost-latest -y
           fi
-          LLVM_URL="http://llvm.org/releases/${LLVM_VERSION}/llvm-${LLVM_VERSION}.src.tar.xz"
-          LIBCXX_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxx-${LLVM_VERSION}.src.tar.xz"
-          LIBCXXABI_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxxabi-${LLVM_VERSION}.src.tar.xz"
-          mkdir -p llvm llvm/build llvm/projects/libcxx llvm/projects/libcxxabi
-          wget -O - ${LLVM_URL} | tar --strip-components=1 -xJ -C llvm
-          wget -O - ${LIBCXX_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxx
-          wget -O - ${LIBCXXABI_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxxabi
-          (cd llvm/build && cmake .. -DCMAKE_INSTALL_PREFIX=${LLVM_INSTALL})
-          (cd llvm/build/projects/libcxx && make install -j2)
-          (cd llvm/build/projects/libcxxabi && make install -j2)
-          export CXXFLAGS="-isystem ${LLVM_INSTALL}/include/c++/v1"
-          export LDFLAGS="-L ${LLVM_INSTALL}/lib -l c++ -l c++abi"
-          export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${LLVM_INSTALL}/lib"
-        fi
 
-        popd
+          if [[ "${{ matrix.LLVM_APT_SOURCE }}" != "" ]]; then
+            wget -qO - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
+            add-apt-repository "${{ matrix.LLVM_APT_SOURCE }}"
+          fi
 
-        # Build cereal and test
-        cmake --version
-        mkdir build && cd build
-        cmake ${CMAKE_OPTIONS} .. && make -j4 VERBOSE=1
-        ctest . --output-on-failure
+          apt-get update -y
+
+          # Install apt packages
+          apt-get install libboost-serialization-dev libboost-dev ${{ matrix.EXTRA_APT_PACKAGES }} -y
+          pip3 install --upgrade "pip < 21.0"
+          pip3 install cmake
+
+          # Set compiler and env variables
+          cd /var/workspace
+          export CXX=${{ matrix.COMPILER }}
+          ${CXX} --version
+          DEPS_DIR="${PWD}/deps"
+          mkdir -p "${DEPS_DIR}"
+          pushd "${DEPS_DIR}"
+          JOBS=2
+
+          # Install the right version of libc++
+          LLVM_INSTALL=${DEPS_DIR}/llvm/install
+          # if in linux and compiler clang and llvm not installed
+          if [[ "${CXX}" == "clang"* && -n "$(ls -A ${LLVM_INSTALL})" ]]; then
+            if   [[ "${CXX}" == "clang++-3.6" ]]; then LLVM_VERSION="3.6.2";
+            elif [[ "${CXX}" == "clang++-3.7" ]]; then LLVM_VERSION="3.7.1";
+            elif [[ "${CXX}" == "clang++-3.8" ]]; then LLVM_VERSION="3.8.1";
+            elif [[ "${CXX}" == "clang++-3.9" ]]; then LLVM_VERSION="3.9.1";
+            fi
+            LLVM_URL="http://llvm.org/releases/${LLVM_VERSION}/llvm-${LLVM_VERSION}.src.tar.xz"
+            LIBCXX_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxx-${LLVM_VERSION}.src.tar.xz"
+            LIBCXXABI_URL="http://llvm.org/releases/${LLVM_VERSION}/libcxxabi-${LLVM_VERSION}.src.tar.xz"
+            mkdir -p llvm llvm/build llvm/projects/libcxx llvm/projects/libcxxabi
+            wget -O - ${LLVM_URL} | tar --strip-components=1 -xJ -C llvm
+            wget -O - ${LIBCXX_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxx
+            wget -O - ${LIBCXXABI_URL} | tar --strip-components=1 -xJ -C llvm/projects/libcxxabi
+            (cd llvm/build && cmake .. -DCMAKE_INSTALL_PREFIX=${LLVM_INSTALL})
+            (cd llvm/build/projects/libcxx && make install -j2)
+            (cd llvm/build/projects/libcxxabi && make install -j2)
+            export CXXFLAGS="-isystem ${LLVM_INSTALL}/include/c++/v1"
+            export LDFLAGS="-L ${LLVM_INSTALL}/lib -l c++ -l c++abi"
+            export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${LLVM_INSTALL}/lib"
+          fi
+
+          popd
+
+          # Build cereal and test
+          cmake --version
+          mkdir build && cd build
+          cmake ${{ matrix.CMAKE_OPTIONS }} .. && make -j4 VERBOSE=1
+          ctest . --output-on-failure

.gitignore

@@ -28,6 +28,8 @@
 *.pdb
 *.idb
 *\build_*
+.vs/
+CMakeSettings.json
 
 # misc files mostly used for testing
 out.txt

CMakeLists.txt

@@ -6,9 +6,13 @@ if(PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
     set(CEREAL_MASTER_PROJECT ON)
 endif()
 
-
-if(APPLE)
-    option(SKIP_PORTABILITY_TEST "Skip portability (32 bit) tests" ON)
+option(SKIP_PORTABILITY_TEST "Skip portability (32 bit) tests" OFF)
+include(CheckCXXCompilerFlag)
+set(CMAKE_REQUIRED_FLAGS "-m32")
+check_cxx_compiler_flag("-m32" COMPILER_SUPPORT_M32)
+unset(CMAKE_REQUIRED_FLAGS)
+if(NOT COMPILER_SUPPORT_M32)
+    set(SKIP_PORTABILITY_TEST ON CACHE BOOL "Skip portability (32 bit) tests" FORCE)
 endif()
 
 option(BUILD_DOC "Build documentation" ON)
@@ -87,9 +91,15 @@ if(CEREAL_INSTALL)
         ${configFile}
         INSTALL_DESTINATION ${configInstallDestination}
     )
-    write_basic_package_version_file(
-        ${versionFile}
-        COMPATIBILITY SameMajorVersion
+    if(${CMAKE_VERSION} VERSION_GREATER 3.13)
+        write_basic_package_version_file("${versionFile}" COMPATIBILITY SameMajorVersion ARCH_INDEPENDENT)
+    else()
+        write_basic_package_version_file("${versionFile}" COMPATIBILITY SameMajorVersion)
+    endif()
+    configure_file(
+        ${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}.pc.in
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc
+        @ONLY
     )
 
     install(FILES ${configFile} ${versionFile} DESTINATION ${configInstallDestination})
@@ -98,6 +108,10 @@ if(CEREAL_INSTALL)
         NAMESPACE "cereal::"
         DESTINATION ${configInstallDestination}
     )
+    install(
+        FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc
+        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig
+    )
 endif()
 
 

cereal.pc.in

@@ -0,0 +1,8 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PROJECT_NAME@
+Description: cereal is a header-only C++11 serialization library
+URL: https://uscilab.github.io/cereal/
+Version: @PROJECT_VERSION@
+Cflags: -I"${includedir}"

include/cereal/archives/json.hpp

@@ -188,7 +188,7 @@ namespace cereal
 
         auto base64string = base64::encode( reinterpret_cast<const unsigned char *>( data ), size );
         saveValue( base64string );
-      };
+      }
 
       //! @}
       /*! @name Internal Functionality
@@ -261,6 +261,13 @@ namespace cereal
       //! Saves a nullptr to the current node
       void saveValue(std::nullptr_t)        { itsWriter.Null();                                                          }
 
+      template <class T> inline
+      typename std::enable_if<!std::is_same<T, int64_t>::value && std::is_same<T, long long>::value, void>::type
+      saveValue(T val)     { itsWriter.Int64(val); }
+      template <class T> inline
+      typename std::enable_if<!std::is_same<T, uint64_t>::value && std::is_same<T, unsigned long long>::value, void>::type
+      saveValue(T val)     { itsWriter.Uint64(val); }
+
     private:
       // Some compilers/OS have difficulty disambiguating the above for various flavors of longs, so we provide
       // special overloads to handle these cases.
@@ -310,6 +317,8 @@ namespace cereal
                                           !std::is_same<T, unsigned long>::value,
                                           !std::is_same<T, std::int64_t>::value,
                                           !std::is_same<T, std::uint64_t>::value,
+                                          !std::is_same<T, long long>::value,
+                                          !std::is_same<T, unsigned long long>::value,
                                           (sizeof(T) >= sizeof(long double) || sizeof(T) >= sizeof(long long))> = traits::sfinae> inline
       void saveValue(T const & t)
       {
@@ -465,7 +474,7 @@ namespace cereal
 
         std::memcpy( data, decoded.data(), decoded.size() );
         itsNextName = nullptr;
-      };
+      }
 
     private:
       //! @}
@@ -659,6 +668,12 @@ namespace cereal
       //! Loads a nullptr from the current node
       void loadValue(std::nullptr_t&)   { search(); CEREAL_RAPIDJSON_ASSERT(itsIteratorStack.back().value().IsNull()); ++itsIteratorStack.back(); }
 
+      template <class T> inline
+      typename std::enable_if<!std::is_same<T, int64_t>::value && std::is_same<T, long long>::value, void>::type
+      loadValue(T & val)     { search(); val = itsIteratorStack.back().value().GetInt64(); ++itsIteratorStack.back(); }
+      template <class T> inline
+      typename std::enable_if<!std::is_same<T, uint64_t>::value && std::is_same<T, unsigned long long>::value, void>::type
+      loadValue(T & val)     { search(); val = itsIteratorStack.back().value().GetUint64(); ++itsIteratorStack.back(); }
       // Special cases to handle various flavors of long, which tend to conflict with
       // the int32_t or int64_t on various compiler/OS combinations.  MSVC doesn't need any of this.
       #ifndef _MSC_VER
@@ -714,6 +729,8 @@ namespace cereal
                                           !std::is_same<T, unsigned long>::value,
                                           !std::is_same<T, std::int64_t>::value,
                                           !std::is_same<T, std::uint64_t>::value,
+                                          !std::is_same<T, long long>::value,
+                                          !std::is_same<T, unsigned long long>::value,
                                           (sizeof(T) >= sizeof(long double) || sizeof(T) >= sizeof(long long))> = traits::sfinae>
       inline void loadValue(T & val)
       {

include/cereal/archives/xml.hpp

@@ -136,7 +136,7 @@ namespace cereal
               */
           //! @{
 
-          //! Sets the precision used for floaing point numbers
+          //! Sets the precision used for floating point numbers
           Options & precision( int value ){ itsPrecision = value; return * this; }
           //! Whether to indent each line of XML
           Options & indent( bool enable ){ itsIndent = enable; return *this; }

include/cereal/cereal.hpp

@@ -176,7 +176,7 @@ namespace cereal
         a serialization function.  Classes with no data members are considered to be
         empty.  Be warned that if this is enabled and you attempt to serialize an
         empty class with improperly formed serialize or load/save functions, no
-        static error will occur - the error will propogate silently and your
+        static error will occur - the error will propagate silently and your
         intended serialization functions may not be called.  You can manually
         ensure that your classes that have custom serialization are correct
         by using the traits is_output_serializable and is_input_serializable
@@ -391,7 +391,7 @@ namespace cereal
           point to the same data.
 
           @internal
-          @param sharedPointer The shared pointer itself (the adress is taked via get()).
+          @param sharedPointer The shared pointer itself (the address is taken via get()).
                                The archive takes a copy to prevent the memory location to be freed
                                as long as the address is used as id. This is needed to prevent CVE-2020-11105.
           @return A key that uniquely identifies the pointer */
@@ -820,7 +820,7 @@ namespace cereal
 
           @internal
           @param id The unique id that was serialized for the polymorphic type
-          @return The string identifier for the tyep */
+          @return The string identifier for the type */
       inline std::string getPolymorphicName(std::uint32_t const id)
       {
         auto name = itsPolymorphicTypeMap.find( id );
@@ -837,7 +837,7 @@ namespace cereal
 
           @internal
           @param id The unique identifier for the polymorphic type
-          @param name The name associated with the tyep */
+          @param name The name associated with the type */
       inline void registerPolymorphicName(std::uint32_t const id, std::string const & name)
       {
         std::uint32_t const stripped_id = id & ~detail::msb_32bit;

include/cereal/details/polymorphic_impl.hpp

@@ -64,7 +64,7 @@
   #define CEREAL_BIND_TO_ARCHIVES_UNUSED_FUNCTION static void unused() { (void)b; }
 #endif
 
-//! Binds a polymorhic type to all registered archives
+//! Binds a polymorphic type to all registered archives
 /*! This binds a polymorphic type to all compatible registered archives that
     have been registered with CEREAL_REGISTER_ARCHIVE.  This must be called
     after all archives are registered (usually after the archives themselves
@@ -277,8 +277,8 @@ namespace cereal
 
         // Find all chainable unregistered relations
         /* The strategy here is to process only the nodes in the class hierarchy graph that have been
-           affected by the new insertion. The aglorithm iteratively processes a node an ensures that it
-           is updated with all new shortest length paths. It then rocesses the parents of the active node,
+           affected by the new insertion. The algorithm iteratively processes a node an ensures that it
+           is updated with all new shortest length paths. It then processes the parents of the active node,
            with the knowledge that all children have already been processed.
 
            Note that for the following, we'll use the nomenclature of parent and child to not confuse with
@@ -335,7 +335,7 @@ namespace cereal
                 auto parentChildPath = checkRelation( parent, child );
 
                 // Search all paths from the child to its own children (finalChild),
-                // looking for a shorter parth from parent to finalChild
+                // looking for a shorter path from parent to finalChild
                 for( auto const & finalChildPair : baseMap[child] )
                 {
                   const auto finalChild = finalChildPair.first;
@@ -812,7 +812,7 @@ namespace cereal
 
         Since the compiler needs to check all possible overloads, the
         other overloads created via CEREAL_REGISTER_ARCHIVE, which will have
-        lower precedence due to requring a conversion from int to (Archive*),
+        lower precedence due to requiring a conversion from int to (Archive*),
         will cause their return types to be instantiated through the static object
         mechanisms even though they are never called.
 

include/cereal/macros.hpp

@@ -141,7 +141,7 @@
 #endif
 
 //! Checks if C++14 is available
-#if __cplusplus >= 201402L
+#if (__cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L))
 #define CEREAL_HAS_CPP14
 #endif
 

include/cereal/types/array.hpp

@@ -42,7 +42,7 @@ namespace cereal
                           && std::is_arithmetic<T>::value, void>::type
   CEREAL_SAVE_FUNCTION_NAME( Archive & ar, std::array<T, N> const & array )
   {
-    ar( binary_data( array.data(), sizeof(array) ) );
+    ar( binary_data( array.data(), N*sizeof(T) ) );
   }
 
   //! Loading for std::array primitive types
@@ -52,7 +52,7 @@ namespace cereal
                           && std::is_arithmetic<T>::value, void>::type
   CEREAL_LOAD_FUNCTION_NAME( Archive & ar, std::array<T, N> & array )
   {
-    ar( binary_data( array.data(), sizeof(array) ) );
+    ar( binary_data( array.data(), N*sizeof(T) ) );
   }
 
   //! Saving for std::array all other types

include/cereal/types/memory.hpp

@@ -286,7 +286,7 @@ namespace cereal
     {
       // Storage type for the pointer - since we can't default construct this type,
       // we'll allocate it using std::aligned_storage and use a custom deleter
-      using ST = typename std::aligned_storage<sizeof(T), CEREAL_ALIGNOF(T)>::type;
+      using AlignedStorage = typename std::aligned_storage<sizeof(T), CEREAL_ALIGNOF(T)>::type;
 
       // Valid flag - set to true once construction finishes
       //  This prevents us from calling the destructor on
@@ -296,13 +296,13 @@ namespace cereal
       // Allocate our storage, which we will treat as
       //  uninitialized until initialized with placement new
       using NonConstT = typename std::remove_const<T>::type;
-      std::shared_ptr<NonConstT> ptr(reinterpret_cast<NonConstT *>(new ST()),
+      std::shared_ptr<NonConstT> ptr(reinterpret_cast<NonConstT *>(new AlignedStorage()),
           [=]( NonConstT * t )
           {
             if( *valid )
               t->~T();
 
-            delete reinterpret_cast<ST *>( t );
+            delete reinterpret_cast<AlignedStorage*>( t );
           } );
 
       // Register the pointer
@@ -377,11 +377,11 @@ namespace cereal
       using NonConstT = typename std::remove_const<T>::type;
       // Storage type for the pointer - since we can't default construct this type,
       // we'll allocate it using std::aligned_storage
-      using ST = typename std::aligned_storage<sizeof(NonConstT), CEREAL_ALIGNOF(NonConstT)>::type;
+      using AlignedStorage = typename std::aligned_storage<sizeof(NonConstT), CEREAL_ALIGNOF(NonConstT)>::type;
 
-      // Allocate storage - note the ST type so that deleter is correct if
+      // Allocate storage - note the AlignedStorage type so that deleter is correct if
       //                    an exception is thrown before we are initialized
-      std::unique_ptr<ST> stPtr( new ST() );
+      std::unique_ptr<AlignedStorage> stPtr( new AlignedStorage() );
 
       // Use wrapper to enter into "data" nvp of ptr_wrapper
       memory_detail::LoadAndConstructLoadWrapper<Archive, NonConstT> loadWrapper( reinterpret_cast<NonConstT *>( stPtr.get() ) );

sandbox/performance.cpp

@@ -258,7 +258,7 @@ random_value(std::mt19937 & gen)
 {
   std::string s(std::uniform_int_distribution<int>(3, 30)(gen), ' ');
   for(char & c : s)
-    c = std::uniform_int_distribution<char>(' ', '~')(gen);
+    c = static_cast<char>( std::uniform_int_distribution<int>(' ', '~')(gen) );
   return s;
 }
 
@@ -277,7 +277,7 @@ std::string random_binary_string(std::mt19937 & gen)
 {
   std::string s(N, ' ');
   for(auto & c : s )
-    c = std::uniform_int_distribution<char>('0', '1')(gen);
+    c = static_cast<char>( std::uniform_int_distribution<int>( '0', '1' )(gen) );
   return s;
 }
 

sandbox/sandbox.cpp

@@ -714,7 +714,7 @@ int main()
     std::ifstream ss("xml_ordering.out");
     cereal::XMLInputArchive ar(ss);
 
-    // Output prodered out of order, try to load in order 1 2 3 4
+    // Output out of order, try to load in order 1 2 3 4
     double one;
     double two;
     double three;

sandbox/sandbox_vs.cpp

@@ -77,7 +77,7 @@ CEREAL_SETUP_ARCHIVE_TRAITS(Archive, Archive)
 struct Test
 {
   template <class Archive>
-  void serialzize( Archive & )
+  void serialize( Archive & )
   {
     std::cout << "hey there" << std::endl;
   }

unittests/array.cpp

@@ -31,22 +31,26 @@ TEST_SUITE_BEGIN("array");
 
 TEST_CASE("binary_array")
 {
-  test_array<cereal::BinaryInputArchive, cereal::BinaryOutputArchive>();
+  test_array<cereal::BinaryInputArchive, cereal::BinaryOutputArchive, 0>();
+  test_array<cereal::BinaryInputArchive, cereal::BinaryOutputArchive, 100>();
 }
 
 TEST_CASE("portable_binary_array")
 {
-  test_array<cereal::PortableBinaryInputArchive, cereal::PortableBinaryOutputArchive>();
+  test_array<cereal::PortableBinaryInputArchive, cereal::PortableBinaryOutputArchive, 0>();
+  test_array<cereal::PortableBinaryInputArchive, cereal::PortableBinaryOutputArchive, 100>();
 }
 
 TEST_CASE("xml_array")
 {
-  test_array<cereal::XMLInputArchive, cereal::XMLOutputArchive>();
+  test_array<cereal::XMLInputArchive, cereal::XMLOutputArchive, 0>();
+  test_array<cereal::XMLInputArchive, cereal::XMLOutputArchive, 100>();
 }
 
 TEST_CASE("json_array")
 {
-  test_array<cereal::JSONInputArchive, cereal::JSONOutputArchive>();
+  test_array<cereal::JSONInputArchive, cereal::JSONOutputArchive, 0>();
+  test_array<cereal::JSONInputArchive, cereal::JSONOutputArchive, 100>();
 }
 
 TEST_SUITE_END();

unittests/array.hpp

@@ -28,7 +28,7 @@
 #define CEREAL_TEST_ARRAY_H_
 #include "common.hpp"
 
-template <class IArchive, class OArchive> inline
+template <class IArchive, class OArchive, size_t N> inline
 void test_array()
 {
   std::random_device rd;
@@ -36,23 +36,23 @@ void test_array()
 
   for(int ii=0; ii<100; ++ii)
   {
-    std::array<int, 100> o_podarray;
+    std::array<int, N> o_podarray;
     for(auto & elem : o_podarray)
       elem = random_value<int>(gen);
 
-    std::array<StructInternalSerialize, 100> o_iserarray;
+    std::array<StructInternalSerialize, N> o_iserarray;
     for(auto & elem : o_iserarray)
       elem = StructInternalSerialize( random_value<int>(gen), random_value<int>(gen) );
 
-    std::array<StructInternalSplit, 100> o_isplarray;
+    std::array<StructInternalSplit, N> o_isplarray;
     for(auto & elem : o_isplarray)
       elem = StructInternalSplit( random_value<int>(gen), random_value<int>(gen) );
 
-    std::array<StructExternalSerialize, 100> o_eserarray;
+    std::array<StructExternalSerialize, N> o_eserarray;
     for(auto & elem : o_eserarray)
       elem = StructExternalSerialize( random_value<int>(gen), random_value<int>(gen) );
 
-    std::array<StructExternalSplit, 100> o_esplarray;
+    std::array<StructExternalSplit, N> o_esplarray;
     for(auto & elem : o_esplarray)
       elem = StructExternalSplit( random_value<int>(gen), random_value<int>(gen) );
 
@@ -67,11 +67,11 @@ void test_array()
       oar(o_esplarray);
     }
 
-    std::array<int, 100> i_podarray;
-    std::array<StructInternalSerialize, 100> i_iserarray;
-    std::array<StructInternalSplit, 100>     i_isplarray;
-    std::array<StructExternalSerialize, 100> i_eserarray;
-    std::array<StructExternalSplit, 100>     i_esplarray;
+    std::array<int, N> i_podarray;
+    std::array<StructInternalSerialize, N> i_iserarray;
+    std::array<StructInternalSplit, N>     i_isplarray;
+    std::array<StructExternalSerialize, N> i_eserarray;
+    std::array<StructExternalSplit, N>     i_esplarray;
 
     std::istringstream is(os.str());
     {

unittests/map.hpp

@@ -62,7 +62,7 @@ void test_map()
 
     std::map<int8_t, StructExternalSplit> o_esplmap;
     for(int j=0; j<100; ++j)
-      o_esplmap.insert({random_value<char>(gen),  { random_value<int>(gen), random_value<int>(gen) }});
+      o_esplmap.insert({random_value<int8_t>(gen),  { random_value<int>(gen), random_value<int>(gen) }});
 
     std::ostringstream os;
     {

unittests/multimap.hpp

@@ -71,7 +71,7 @@ void test_multimap()
     std::multimap<int8_t, StructExternalSplit> o_esplmultimap;
     for(int j=0; j<100; ++j)
     {
-      auto key = random_value<char>(gen);
+      auto key = random_value<int8_t>(gen);
       o_esplmultimap.insert({key,  { random_value<int>(gen), random_value<int>(gen) }});
       o_esplmultimap.insert({key,  { random_value<int>(gen), random_value<int>(gen) }});
     }

unittests/pod.cpp

@@ -49,4 +49,14 @@ TEST_CASE("json_pod")
   test_pod<cereal::JSONInputArchive, cereal::JSONOutputArchive>();
 }
 
+TEST_CASE("xml_pod_serialization")
+{
+  test_pod_serialization<cereal::XMLInputArchive, cereal::XMLOutputArchive>();
+}
+
+TEST_CASE("json_pod_serialization")
+{
+  test_pod_serialization<cereal::JSONInputArchive, cereal::JSONOutputArchive>();
+}
+
 TEST_SUITE_END();

unittests/pod.hpp

@@ -144,4 +144,72 @@ void test_pod()
   }
 }
 
+template <class IArchive, class OArchive, class T1, class T2>
+void test_pod_serialization(std::mt19937& gen)
+{
+  T1 const o_t1 = random_value<T1>(gen);
+  T2 const o_t2 = o_t1;
+
+  std::ostringstream os1;
+  {
+    OArchive oar(os1);
+    oar(o_t1);
+  }
+
+  std::ostringstream os2;
+  {
+    OArchive oar(os2);
+    oar(o_t2);
+  }
+
+  CHECK_EQ(os1.str(), os2.str());
+
+  T1 i_t1 = T1();
+  T2 i_t2 = T2();
+  CHECK_EQ(os1.str(), os2.str());
+  std::istringstream is1(os1.str());
+  {
+    IArchive iar(is1);
+    iar(i_t1);
+  }
+  CHECK_EQ(o_t1, i_t1);
+
+  std::istringstream is2(os2.str());
+  {
+    IArchive iar(is2);
+    iar(i_t2);
+  }
+  CHECK_EQ(o_t2, i_t2);
+}
+
+template <class IArchive, class OArchive>
+void test_pod_serialization()
+{
+  std::random_device rd;
+  std::mt19937 gen(rd());
+  for (size_t i = 0; i < 100; ++i) {
+    test_pod_serialization<IArchive, OArchive, int8_t, int16_t>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, uint16_t>(gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, int32_t>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, uint32_t>(gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, int64_t>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, uint64_t>(gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, long>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, unsigned long>(gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, long long>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, unsigned long long>(
+        gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, int>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, unsigned int>(gen);
+
+    test_pod_serialization<IArchive, OArchive, int8_t, short>(gen);
+    test_pod_serialization<IArchive, OArchive, uint8_t, unsigned short>(gen);
+  }
+}
+
 #endif // CEREAL_TEST_POD_H_

unittests/unordered_map.hpp

@@ -54,7 +54,7 @@ void test_unordered_map()
 
     std::unordered_map<int8_t, StructExternalSplit> o_esplunordered_map;
     for(int j=0; j<100; ++j)
-      o_esplunordered_map.insert({random_value<char>(gen),  { random_value<int>(gen), random_value<int>(gen) }});
+      o_esplunordered_map.insert({random_value<int8_t>(gen),  { random_value<int>(gen), random_value<int>(gen) }});
 
     std::ostringstream os;
     {

unittests/unordered_multimap.hpp

@@ -71,7 +71,7 @@ void test_unordered_multimap()
     std::unordered_multimap<int8_t, StructExternalSplit> o_esplunordered_multimap;
     for(int j=0; j<100; ++j)
     {
-      auto key = random_value<char>(gen);
+      auto key = random_value<int8_t>(gen);
       o_esplunordered_multimap.insert({key,  { random_value<int>(gen), random_value<int>(gen) }});
       o_esplunordered_multimap.insert({key,  { random_value<int>(gen), random_value<int>(gen) }});
     }