mirror of
https://github.com/nlohmann/json
synced 2024-11-22 12:00:05 +00:00
447 lines
15 KiB
C++
447 lines
15 KiB
C++
// __ _____ _____ _____
|
|
// __| | __| | | | JSON for Modern C++
|
|
// | | |__ | | | | | | version 3.11.2
|
|
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
|
|
//
|
|
// SPDX-FileCopyrightText: 2013-2022 Niels Lohmann <https://nlohmann.me>
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
#pragma once
|
|
|
|
#include <algorithm> // copy
|
|
#include <iterator> // begin, end
|
|
#include <string> // string
|
|
#include <tuple> // tuple, get
|
|
#include <type_traits> // is_same, is_constructible, is_floating_point, is_enum, underlying_type
|
|
#include <utility> // move, forward, declval, pair
|
|
#include <valarray> // valarray
|
|
#include <vector> // vector
|
|
|
|
#include <nlohmann/detail/iterators/iteration_proxy.hpp>
|
|
#include <nlohmann/detail/macro_scope.hpp>
|
|
#include <nlohmann/detail/meta/cpp_future.hpp>
|
|
#include <nlohmann/detail/meta/std_fs.hpp>
|
|
#include <nlohmann/detail/meta/type_traits.hpp>
|
|
#include <nlohmann/detail/value_t.hpp>
|
|
|
|
NLOHMANN_JSON_NAMESPACE_BEGIN
|
|
namespace detail
|
|
{
|
|
|
|
//////////////////
|
|
// constructors //
|
|
//////////////////
|
|
|
|
/*
|
|
* Note all external_constructor<>::construct functions need to call
|
|
* j.m_value.destroy(j.m_type) to avoid a memory leak in case j contains an
|
|
* allocated value (e.g., a string). See bug issue
|
|
* https://github.com/nlohmann/json/issues/2865 for more information.
|
|
*/
|
|
|
|
template<value_t> struct external_constructor;
|
|
|
|
template<>
|
|
struct external_constructor<value_t::boolean>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::boolean_t b) noexcept
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::boolean;
|
|
j.m_value = b;
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::string>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, const typename BasicJsonType::string_t& s)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::string;
|
|
j.m_value = s;
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::string_t&& s)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::string;
|
|
j.m_value = std::move(s);
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template < typename BasicJsonType, typename CompatibleStringType,
|
|
enable_if_t < !std::is_same<CompatibleStringType, typename BasicJsonType::string_t>::value,
|
|
int > = 0 >
|
|
static void construct(BasicJsonType& j, const CompatibleStringType& str)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::string;
|
|
j.m_value.string = j.template create<typename BasicJsonType::string_t>(str);
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::binary>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, const typename BasicJsonType::binary_t& b)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::binary;
|
|
j.m_value = typename BasicJsonType::binary_t(b);
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::binary_t&& b)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::binary;
|
|
j.m_value = typename BasicJsonType::binary_t(std::move(b));
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::number_float>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::number_float_t val) noexcept
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::number_float;
|
|
j.m_value = val;
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::number_unsigned>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::number_unsigned_t val) noexcept
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::number_unsigned;
|
|
j.m_value = val;
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::number_integer>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::number_integer_t val) noexcept
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::number_integer;
|
|
j.m_value = val;
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::array>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, const typename BasicJsonType::array_t& arr)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::array;
|
|
j.m_value = arr;
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::array;
|
|
j.m_value = std::move(arr);
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template < typename BasicJsonType, typename CompatibleArrayType,
|
|
enable_if_t < !std::is_same<CompatibleArrayType, typename BasicJsonType::array_t>::value,
|
|
int > = 0 >
|
|
static void construct(BasicJsonType& j, const CompatibleArrayType& arr)
|
|
{
|
|
using std::begin;
|
|
using std::end;
|
|
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::array;
|
|
j.m_value.array = j.template create<typename BasicJsonType::array_t>(begin(arr), end(arr));
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, const std::vector<bool>& arr)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::array;
|
|
j.m_value = value_t::array;
|
|
j.m_value.array->reserve(arr.size());
|
|
for (const bool x : arr)
|
|
{
|
|
j.m_value.array->push_back(x);
|
|
j.set_parent(j.m_value.array->back());
|
|
}
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType, typename T,
|
|
enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
|
|
static void construct(BasicJsonType& j, const std::valarray<T>& arr)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::array;
|
|
j.m_value = value_t::array;
|
|
j.m_value.array->resize(arr.size());
|
|
if (arr.size() > 0)
|
|
{
|
|
std::copy(std::begin(arr), std::end(arr), j.m_value.array->begin());
|
|
}
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
template<>
|
|
struct external_constructor<value_t::object>
|
|
{
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, const typename BasicJsonType::object_t& obj)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::object;
|
|
j.m_value = obj;
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
static void construct(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
|
|
{
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::object;
|
|
j.m_value = std::move(obj);
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
|
|
template < typename BasicJsonType, typename CompatibleObjectType,
|
|
enable_if_t < !std::is_same<CompatibleObjectType, typename BasicJsonType::object_t>::value, int > = 0 >
|
|
static void construct(BasicJsonType& j, const CompatibleObjectType& obj)
|
|
{
|
|
using std::begin;
|
|
using std::end;
|
|
|
|
j.m_value.destroy(j.m_type);
|
|
j.m_type = value_t::object;
|
|
j.m_value.object = j.template create<typename BasicJsonType::object_t>(begin(obj), end(obj));
|
|
j.set_parents();
|
|
j.assert_invariant();
|
|
}
|
|
};
|
|
|
|
/////////////
|
|
// to_json //
|
|
/////////////
|
|
|
|
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
|
|
{
|
|
external_constructor<value_t::boolean>::construct(j, b);
|
|
}
|
|
|
|
template < typename BasicJsonType, typename BoolRef,
|
|
enable_if_t <
|
|
((std::is_same<std::vector<bool>::reference, BoolRef>::value
|
|
&& !std::is_same <std::vector<bool>::reference, typename BasicJsonType::boolean_t&>::value)
|
|
|| (std::is_same<std::vector<bool>::const_reference, BoolRef>::value
|
|
&& !std::is_same <detail::uncvref_t<std::vector<bool>::const_reference>,
|
|
typename BasicJsonType::boolean_t >::value))
|
|
&& std::is_convertible<const BoolRef&, typename BasicJsonType::boolean_t>::value, int > = 0 >
|
|
inline void to_json(BasicJsonType& j, const BoolRef& b) noexcept
|
|
{
|
|
external_constructor<value_t::boolean>::construct(j, static_cast<typename BasicJsonType::boolean_t>(b));
|
|
}
|
|
|
|
template<typename BasicJsonType, typename CompatibleString,
|
|
enable_if_t<std::is_constructible<typename BasicJsonType::string_t, CompatibleString>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, const CompatibleString& s)
|
|
{
|
|
external_constructor<value_t::string>::construct(j, s);
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, typename BasicJsonType::string_t&& s)
|
|
{
|
|
external_constructor<value_t::string>::construct(j, std::move(s));
|
|
}
|
|
|
|
template<typename BasicJsonType, typename FloatType,
|
|
enable_if_t<std::is_floating_point<FloatType>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, FloatType val) noexcept
|
|
{
|
|
external_constructor<value_t::number_float>::construct(j, static_cast<typename BasicJsonType::number_float_t>(val));
|
|
}
|
|
|
|
template<typename BasicJsonType, typename CompatibleNumberUnsignedType,
|
|
enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_unsigned_t, CompatibleNumberUnsignedType>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, CompatibleNumberUnsignedType val) noexcept
|
|
{
|
|
external_constructor<value_t::number_unsigned>::construct(j, static_cast<typename BasicJsonType::number_unsigned_t>(val));
|
|
}
|
|
|
|
template<typename BasicJsonType, typename CompatibleNumberIntegerType,
|
|
enable_if_t<is_compatible_integer_type<typename BasicJsonType::number_integer_t, CompatibleNumberIntegerType>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, CompatibleNumberIntegerType val) noexcept
|
|
{
|
|
external_constructor<value_t::number_integer>::construct(j, static_cast<typename BasicJsonType::number_integer_t>(val));
|
|
}
|
|
|
|
#if !JSON_DISABLE_ENUM_SERIALIZATION
|
|
template<typename BasicJsonType, typename EnumType,
|
|
enable_if_t<std::is_enum<EnumType>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, EnumType e) noexcept
|
|
{
|
|
using underlying_type = typename std::underlying_type<EnumType>::type;
|
|
external_constructor<value_t::number_integer>::construct(j, static_cast<underlying_type>(e));
|
|
}
|
|
#endif // JSON_DISABLE_ENUM_SERIALIZATION
|
|
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, const std::vector<bool>& e)
|
|
{
|
|
external_constructor<value_t::array>::construct(j, e);
|
|
}
|
|
|
|
template < typename BasicJsonType, typename CompatibleArrayType,
|
|
enable_if_t < is_compatible_array_type<BasicJsonType,
|
|
CompatibleArrayType>::value&&
|
|
!is_compatible_object_type<BasicJsonType, CompatibleArrayType>::value&&
|
|
!is_compatible_string_type<BasicJsonType, CompatibleArrayType>::value&&
|
|
!std::is_same<typename BasicJsonType::binary_t, CompatibleArrayType>::value&&
|
|
!is_basic_json<CompatibleArrayType>::value,
|
|
int > = 0 >
|
|
inline void to_json(BasicJsonType& j, const CompatibleArrayType& arr)
|
|
{
|
|
external_constructor<value_t::array>::construct(j, arr);
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, const typename BasicJsonType::binary_t& bin)
|
|
{
|
|
external_constructor<value_t::binary>::construct(j, bin);
|
|
}
|
|
|
|
template<typename BasicJsonType, typename T,
|
|
enable_if_t<std::is_convertible<T, BasicJsonType>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, const std::valarray<T>& arr)
|
|
{
|
|
external_constructor<value_t::array>::construct(j, std::move(arr));
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, typename BasicJsonType::array_t&& arr)
|
|
{
|
|
external_constructor<value_t::array>::construct(j, std::move(arr));
|
|
}
|
|
|
|
template < typename BasicJsonType, typename CompatibleObjectType,
|
|
enable_if_t < is_compatible_object_type<BasicJsonType, CompatibleObjectType>::value&& !is_basic_json<CompatibleObjectType>::value, int > = 0 >
|
|
inline void to_json(BasicJsonType& j, const CompatibleObjectType& obj)
|
|
{
|
|
external_constructor<value_t::object>::construct(j, obj);
|
|
}
|
|
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
|
|
{
|
|
external_constructor<value_t::object>::construct(j, std::move(obj));
|
|
}
|
|
|
|
template <
|
|
typename BasicJsonType, typename T, std::size_t N,
|
|
enable_if_t < !std::is_constructible<typename BasicJsonType::string_t,
|
|
const T(&)[N]>::value, // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
|
|
int > = 0 >
|
|
inline void to_json(BasicJsonType& j, const T(&arr)[N]) // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
|
|
{
|
|
external_constructor<value_t::array>::construct(j, arr);
|
|
}
|
|
|
|
template < typename BasicJsonType, typename T1, typename T2, enable_if_t < std::is_constructible<BasicJsonType, T1>::value&& std::is_constructible<BasicJsonType, T2>::value, int > = 0 >
|
|
inline void to_json(BasicJsonType& j, const std::pair<T1, T2>& p)
|
|
{
|
|
j = { p.first, p.second };
|
|
}
|
|
|
|
// for https://github.com/nlohmann/json/pull/1134
|
|
template<typename BasicJsonType, typename T,
|
|
enable_if_t<std::is_same<T, iteration_proxy_value<typename BasicJsonType::iterator>>::value, int> = 0>
|
|
inline void to_json(BasicJsonType& j, const T& b)
|
|
{
|
|
j = { {b.key(), b.value()} };
|
|
}
|
|
|
|
template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
|
|
inline void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...> /*unused*/)
|
|
{
|
|
j = { std::get<Idx>(t)... };
|
|
}
|
|
|
|
template<typename BasicJsonType, typename T, enable_if_t<is_constructible_tuple<BasicJsonType, T>::value, int > = 0>
|
|
inline void to_json(BasicJsonType& j, const T& t)
|
|
{
|
|
to_json_tuple_impl(j, t, make_index_sequence<std::tuple_size<T>::value> {});
|
|
}
|
|
|
|
#if JSON_HAS_FILESYSTEM || JSON_HAS_EXPERIMENTAL_FILESYSTEM
|
|
template<typename BasicJsonType>
|
|
inline void to_json(BasicJsonType& j, const std_fs::path& p)
|
|
{
|
|
j = p.string();
|
|
}
|
|
#endif
|
|
|
|
struct to_json_fn
|
|
{
|
|
template<typename BasicJsonType, typename T>
|
|
auto operator()(BasicJsonType& j, T&& val) const noexcept(noexcept(to_json(j, std::forward<T>(val))))
|
|
-> decltype(to_json(j, std::forward<T>(val)), void())
|
|
{
|
|
return to_json(j, std::forward<T>(val));
|
|
}
|
|
};
|
|
} // namespace detail
|
|
|
|
#ifndef JSON_HAS_CPP_17
|
|
/// namespace to hold default `to_json` function
|
|
/// to see why this is required:
|
|
/// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
|
|
namespace // NOLINT(cert-dcl59-cpp,fuchsia-header-anon-namespaces,google-build-namespaces)
|
|
{
|
|
#endif
|
|
JSON_INLINE_VARIABLE constexpr const auto& to_json = // NOLINT(misc-definitions-in-headers)
|
|
detail::static_const<detail::to_json_fn>::value;
|
|
#ifndef JSON_HAS_CPP_17
|
|
} // namespace
|
|
#endif
|
|
|
|
NLOHMANN_JSON_NAMESPACE_END
|