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feat: Rebase feature/optional to develop (#4036)

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* 🚧 conversions for std::optional

* 🏁 fix <optional> inclusion

* 💚 overwork tests

* Use JSON_HAS_CPP_17 only after it has been defined

* ✅ update tests

* 🏁 include right <optional> header

* ♻️ do not include experimental headers

* Add missing #endif after rebase

* Fix failing test

* Only define conversion to std::optional when JSON_USE_IMPLICIT_CONVERSION is disabled.

* missing endif

* Remove Wfloat-equal suppress

* amalgamate

* Move include of optional out of macro_scope; probably does not make sense to be there

* Make clang-tidy happy

* Suppress lint instead of changing to 'contains'

---------

Co-authored-by: Niels Lohmann <mail@nlohmann.me>
Co-authored-by: Markus Palonen <markus.palonen@gmail.com>
This commit is contained in:
Fredrik Sandhei
2024-11-16 17:19:33 +01:00
committed by GitHub
parent fd20975a94
commit 060414037e
4 changed files with 172 additions and 0 deletions
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41
single_include/nlohmann/json.hpp
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@ -162,6 +162,9 @@
#include <forward_list> // forward_list
#include <iterator> // inserter, front_inserter, end
#include <map> // map
#ifdef JSON_HAS_CPP_17
#include <optional> // optional
#endif
#include <string> // string
#include <tuple> // tuple, make_tuple
#include <type_traits> // is_arithmetic, is_same, is_enum, underlying_type, is_convertible
@ -169,6 +172,7 @@
#include <utility> // pair, declval
#include <valarray> // valarray
// #include <nlohmann/detail/exceptions.hpp>
// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++
@ -4696,6 +4700,24 @@ inline void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
n = nullptr;
}
#ifdef JSON_HAS_CPP_17
#ifndef JSON_USE_IMPLICIT_CONVERSIONS
template<typename BasicJsonType, typename T>
void from_json(const BasicJsonType& j, std::optional<T>& opt)
{
if (j.is_null())
{
opt = std::nullopt;
}
else
{
opt.emplace(j.template get<T>());
}
}
#endif // JSON_USE_IMPLICIT_CONVERSIONS
#endif // JSON_HAS_CPP_17
// overloads for basic_json template parameters
template < typename BasicJsonType, typename ArithmeticType,
enable_if_t < std::is_arithmetic<ArithmeticType>::value&&
@ -5162,6 +5184,9 @@ NLOHMANN_JSON_NAMESPACE_END
#include <algorithm> // copy
#include <iterator> // begin, end
#ifdef JSON_HAS_CPP_17
#include <optional> // optional
#endif
#include <string> // string
#include <tuple> // tuple, get
#include <type_traits> // is_same, is_constructible, is_floating_point, is_enum, underlying_type
@ -5663,6 +5688,22 @@ struct external_constructor<value_t::object>
// to_json //
/////////////
#ifdef JSON_HAS_CPP_17
template<typename BasicJsonType, typename T,
enable_if_t<std::is_constructible<BasicJsonType, T>::value, int> = 0>
void to_json(BasicJsonType& j, const std::optional<T>& opt)
{
if (opt.has_value())
{
j = *opt;
}
else
{
j = nullptr;
}
}
#endif
template<typename BasicJsonType, typename T,
enable_if_t<std::is_same<T, typename BasicJsonType::boolean_t>::value, int> = 0>
inline void to_json(BasicJsonType& j, T b) noexcept