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Add restriction for tuple specialization of to_json

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This commit fix the issue #1825

Signed-off-by: Camille Bégué <c.begue@samsung.com>
This commit is contained in:
Camille Bégué
2019-10-31 18:39:01 +01:00
parent 3790bd9ae0
commit 8b686b30eb
4 changed files with 38 additions and 6 deletions
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6
include/nlohmann/detail/conversions/to_json.hpp
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@@ -322,10 +322,10 @@ void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...>
j = { std::get<Idx>(t)... };
}
template<typename BasicJsonType, typename... Args>
void to_json(BasicJsonType& j, const std::tuple<Args...>& t)
template<typename BasicJsonType, typename T, enable_if_t<is_constructible_tuple<BasicJsonType, T>::value, int > = 0>
void to_json(BasicJsonType& j, const T& t)
{
to_json_tuple_impl(j, t, index_sequence_for<Args...> {});
to_json_tuple_impl(j, t, make_index_sequence<std::tuple_size<T>::value> {});
}
struct to_json_fn