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Class versioning working

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This commit is contained in:
Randolph Voorhies
2013-06-12 11:18:35 -07:00
parent c8c6846905
commit be5d1581d4
3 changed files with 34 additions and 18 deletions
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14
cereal.hpp
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@@ -22,7 +22,8 @@ namespace cereal
BinaryOutputArchive &>::type BinaryOutputArchive &>::type
operator & (T const & t) operator & (T const & t)
{ {
std::cout << "Member serialize" << std::endl; std::cout << "Member serialize. Version " << cereal_class_version(t) << std::endl;
//t.serialize(*this, traits::version<T>::value) //t.serialize(*this, traits::version<T>::value)
return *this; return *this;
} }
@@ -32,7 +33,8 @@ namespace cereal
BinaryOutputArchive &>::type BinaryOutputArchive &>::type
operator & (T const & t) operator & (T const & t)
{ {
std::cout << "Non member serialize" << std::endl; std::cout << "Non member serialize. Version " << cereal_class_version(t) << std::endl;
//serialize(*this, t, traits::version<T>::value) //serialize(*this, t, traits::version<T>::value)
return *this; return *this;
} }
@@ -42,7 +44,8 @@ namespace cereal
BinaryOutputArchive &>::type BinaryOutputArchive &>::type
operator & (T const & t) operator & (T const & t)
{ {
std::cout << "Member split" << std::endl; std::cout << "Member split. Version " << cereal_class_version(t) << std::endl;
//t.save(*this, traits::version<T>::value); //t.save(*this, traits::version<T>::value);
return *this; return *this;
} }
@@ -52,7 +55,7 @@ namespace cereal
BinaryOutputArchive &>::type BinaryOutputArchive &>::type
operator & (T const & t) operator & (T const & t)
{ {
std::cout << "Non member split" << std::endl; std::cout << "Non member split. Version " << cereal_class_version(t) << std::endl;
//save(*this, t, traits::version<T>::value); //save(*this, t, traits::version<T>::value);
return *this; return *this;
} }
@@ -73,4 +76,7 @@ namespace cereal
} }
}; };
#define CEREAL_CLASS_VERSION(classname, version) \
unsigned int constexpr cereal_class_version(classname const &) { return version; };
} }

34
test.cpp
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@@ -13,6 +13,7 @@ struct Test1
ar & a & b; ar & a & b;
} }
}; };
CEREAL_CLASS_VERSION(Test1, 1);
// ################################### // ###################################
struct Test2 struct Test2
@@ -32,6 +33,7 @@ struct Test2
ar & a & b; ar & a & b;
} }
}; };
CEREAL_CLASS_VERSION(Test2, 2);
// ################################### // ###################################
struct Test3 struct Test3
@@ -46,25 +48,29 @@ void serialize(Archive & ar, Test3 & t, unsigned int version)
//ar & t.a; //ar & t.a;
//ar & t.b; //ar & t.b;
} }
CEREAL_CLASS_VERSION(Test3, 3);
// ################################### namespace test4
struct Test4
{ {
int a; // ###################################
std::string b; struct Test4
{
}; int a;
std::string b;
};
template<class Archive> template<class Archive>
void save(Archive & ar, Test4 & t, unsigned int version) void save(Archive & ar, Test4 & t, unsigned int version)
{ {
ar & t.a & t.b; ar & t.a & t.b;
} }
template<class Archive> template<class Archive>
void load(Archive & ar, Test4 & t, unsigned int version) void load(Archive & ar, Test4 & t, unsigned int version)
{ {
ar & t.a & t.b; ar & t.a & t.b;
}
CEREAL_CLASS_VERSION(Test4, 4);
} }
// ###################################################################### // ######################################################################
@@ -75,7 +81,7 @@ int main()
Test1 t1; Test1 t1;
Test2 t2; Test2 t2;
Test3 t3; Test3 t3;
Test4 t4; test4::Test4 t4;
archive & t1; archive & t1;
archive & t2; archive & t2;

4
traits.hpp
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@@ -1,9 +1,13 @@
namespace cereal namespace cereal
{ {
template<typename T> unsigned int constexpr cereal_class_version(T const &) { return 0; };
namespace traits namespace traits
{ {
template<typename> struct Void { typedef void type; }; template<typename> struct Void { typedef void type; };
// ###################################################################### // ######################################################################
// Member Serialize // Member Serialize
template<typename T, class A, typename Sfinae = void> template<typename T, class A, typename Sfinae = void>