3party/sqlpp11
0
0
Fork 0
mirror of https://github.com/rbock/sqlpp11.git synced 2024-11-15 20:31:16 +08:00
Code Issues Projects Releases Wiki Activity

Add serializer for value_or_null

Browse Source
This commit is contained in:
rbock 2018-06-28 19:20:09 +02:00
parent ef01958b19
commit 8d05e4e05e
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
include/sqlpp11/value_or_null.h
View File

@ -52,6 +52,27 @@ namespace sqlpp
bool _is_null; bool _is_null;
}; };
template <typename Context, typename ValueType>
struct serializer_t<Context, value_or_null_t<ValueType>>
{
using _serialize_check = consistent_t;
using Operand = value_or_null_t<ValueType>;
static Context& _(const Operand& t, Context& context)
{
if (t._is_null)
{
context << "NULL";
}
else
{
serialize(wrap_operand_t<typename ValueType::_cpp_value_type>{t._value}, context);
}
return context;
}
};
template <typename T> template <typename T>
auto value_or_null(T t) -> value_or_null_t<value_type_of<wrap_operand_t<T>>> auto value_or_null(T t) -> value_or_null_t<value_type_of<wrap_operand_t<T>>>
{ {