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Fix conversion to std::optional (#5052)

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* 🐛 fix conversion to std::optional

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🚨 fix warning

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* 🚨 fix warning

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-01-13 17:19:34 +01:00
committed by GitHub
parent 2bb9d59fde
commit e3014f162a
3 changed files with 19 additions and 2 deletions
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3
include/nlohmann/detail/conversions/from_json.hpp
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@@ -53,7 +53,8 @@ inline void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
}
#ifdef JSON_HAS_CPP_17
template<typename BasicJsonType, typename T>
template < typename BasicJsonType, typename T,
typename std::enable_if < !nlohmann::detail::is_basic_json<T>::value, int >::type = 0 >
void from_json(const BasicJsonType& j, std::optional<T>& opt)
{
if (j.is_null())