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Merge branch 'develop' of https://github.com/nlohmann/json into bon8

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This commit is contained in:
Niels Lohmann
2021-10-17 15:27:48 +02:00
parent cec6b21695 67c8ead923
commit d997d1b275
85 changed files with 698 additions and 346 deletions
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18
include/nlohmann/detail/conversions/from_json.hpp
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@@ -19,6 +19,10 @@
#include <nlohmann/detail/meta/type_traits.hpp>
#include <nlohmann/detail/value_t.hpp>
#ifdef JSON_HAS_CPP_17
#include <filesystem>
#endif
namespace nlohmann
{
namespace detail
@@ -169,7 +173,7 @@ void from_json(const BasicJsonType& j, std::valarray<T>& l)
}
template<typename BasicJsonType, typename T, std::size_t N>
auto from_json(const BasicJsonType& j, T (&arr)[N]) // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
auto from_json(const BasicJsonType& j, T (&arr)[N]) // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
-> decltype(j.template get<T>(), void())
{
for (std::size_t i = 0; i < N; ++i)
@@ -444,6 +448,18 @@ void from_json(const BasicJsonType& j, std::unordered_map<Key, Value, Hash, KeyE
}
}
#ifdef JSON_HAS_CPP_17
template<typename BasicJsonType>
void from_json(const BasicJsonType& j, std::filesystem::path& p)
{
if (JSON_HEDLEY_UNLIKELY(!j.is_string()))
{
JSON_THROW(type_error::create(302, "type must be string, but is " + std::string(j.type_name()), j));
}
p = *j.template get_ptr<const typename BasicJsonType::string_t*>();
}
#endif
struct from_json_fn
{
template<typename BasicJsonType, typename T>

13
include/nlohmann/detail/conversions/to_json.hpp
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@@ -9,11 +9,16 @@
#include <valarray> // valarray
#include <vector> // vector
#include <nlohmann/detail/macro_scope.hpp>
#include <nlohmann/detail/iterators/iteration_proxy.hpp>
#include <nlohmann/detail/meta/cpp_future.hpp>
#include <nlohmann/detail/meta/type_traits.hpp>
#include <nlohmann/detail/value_t.hpp>
#ifdef JSON_HAS_CPP_17
#include <filesystem>
#endif
namespace nlohmann
{
namespace detail
@@ -386,6 +391,14 @@ void to_json(BasicJsonType& j, const T& t)
to_json_tuple_impl(j, t, make_index_sequence<std::tuple_size<T>::value> {});
}
#ifdef JSON_HAS_CPP_17
template<typename BasicJsonType>
void to_json(BasicJsonType& j, const std::filesystem::path& p)
{
j = p.string();
}
#endif
struct to_json_fn
{
template<typename BasicJsonType, typename T>

42
include/nlohmann/detail/macro_scope.hpp
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@@ -1,7 +1,8 @@
#pragma once
#include <utility> // pair
#include <utility> // declval, pair
#include <nlohmann/thirdparty/hedley/hedley.hpp>
#include <nlohmann/detail/meta/detected.hpp>
// This file contains all internal macro definitions
// You MUST include macro_unscope.hpp at the end of json.hpp to undef all of them
@@ -292,6 +293,45 @@
inline void to_json(nlohmann::json& nlohmann_json_j, const Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_TO, __VA_ARGS__)) } \
inline void from_json(const nlohmann::json& nlohmann_json_j, Type& nlohmann_json_t) { NLOHMANN_JSON_EXPAND(NLOHMANN_JSON_PASTE(NLOHMANN_JSON_FROM, __VA_ARGS__)) }
// inspired from https://stackoverflow.com/a/26745591
// allows to call any std function as if (e.g. with begin):
// using std::begin; begin(x);
//
// it allows using the detected idiom to retrieve the return type
// of such an expression
#define NLOHMANN_CAN_CALL_STD_FUNC_IMPL(std_name) \
namespace detail { \
using std::std_name; \
\
template<typename... T> \
using result_of_##std_name = decltype(std_name(std::declval<T>()...)); \
} \
\
namespace detail2 { \
struct std_name##_tag \
{ \
}; \
\
template<typename... T> \
std_name##_tag std_name(T&&...); \
\
template<typename... T> \
using result_of_##std_name = decltype(std_name(std::declval<T>()...)); \
\
template<typename... T> \
struct would_call_std_##std_name \
{ \
static constexpr auto const value = ::nlohmann::detail:: \
is_detected_exact<std_name##_tag, result_of_##std_name, T...>::value; \
}; \
} /* namespace detail2 */ \
\
template<typename... T> \
struct would_call_std_##std_name : detail2::would_call_std_##std_name<T...> \
{ \
}
#ifndef JSON_USE_IMPLICIT_CONVERSIONS
#define JSON_USE_IMPLICIT_CONVERSIONS 1
#endif

1
include/nlohmann/detail/macro_unscope.hpp
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@@ -19,5 +19,6 @@
#undef NLOHMANN_BASIC_JSON_TPL_DECLARATION
#undef NLOHMANN_BASIC_JSON_TPL
#undef JSON_EXPLICIT
#undef NLOHMANN_CAN_CALL_STD_FUNC_IMPL
#include <nlohmann/thirdparty/hedley/hedley_undef.hpp>

8
include/nlohmann/detail/meta/call_std/begin.hpp Normal file
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@@ -0,0 +1,8 @@
#pragma once
#include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
NLOHMANN_CAN_CALL_STD_FUNC_IMPL(begin);
} // namespace nlohmann

8
include/nlohmann/detail/meta/call_std/end.hpp Normal file
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@@ -0,0 +1,8 @@
#pragma once
#include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
NLOHMANN_CAN_CALL_STD_FUNC_IMPL(end);
} // namespace nlohmann

105
include/nlohmann/detail/meta/type_traits.hpp
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@@ -5,8 +5,11 @@
#include <utility> // declval
#include <tuple> // tuple
#include <nlohmann/detail/iterators/iterator_traits.hpp>
#include <nlohmann/detail/macro_scope.hpp>
#include <nlohmann/detail/iterators/iterator_traits.hpp>
#include <nlohmann/detail/meta/call_std/begin.hpp>
#include <nlohmann/detail/meta/call_std/end.hpp>
#include <nlohmann/detail/meta/cpp_future.hpp>
#include <nlohmann/detail/meta/detected.hpp>
#include <nlohmann/json_fwd.hpp>
@@ -79,9 +82,6 @@ using reference_t = typename T::reference;
template<typename T>
using iterator_category_t = typename T::iterator_category;
template<typename T>
using iterator_t = typename T::iterator;
template<typename T, typename... Args>
using to_json_function = decltype(T::to_json(std::declval<Args>()...));
@@ -217,6 +217,31 @@ struct is_iterator_traits<iterator_traits<T>>
is_detected<reference_t, traits>::value;
};
template<typename T>
struct is_range
{
private:
using t_ref = typename std::add_lvalue_reference<T>::type;
using iterator = detected_t<result_of_begin, t_ref>;
using sentinel = detected_t<result_of_end, t_ref>;
// to be 100% correct, it should use https://en.cppreference.com/w/cpp/iterator/input_or_output_iterator
// and https://en.cppreference.com/w/cpp/iterator/sentinel_for
// but reimplementing these would be too much work, as a lot of other concepts are used underneath
static constexpr auto is_iterator_begin =
is_iterator_traits<iterator_traits<iterator>>::value;
public:
static constexpr bool value = !std::is_same<iterator, nonesuch>::value && !std::is_same<sentinel, nonesuch>::value && is_iterator_begin;
};
template<typename R>
using iterator_t = enable_if_t<is_range<R>::value, result_of_begin<decltype(std::declval<R&>())>>;
template<typename T>
using range_value_t = value_type_t<iterator_traits<iterator_t<T>>>;
// The following implementation of is_complete_type is taken from
// https://blogs.msdn.microsoft.com/vcblog/2015/12/02/partial-support-for-expression-sfinae-in-vs-2015-update-1/
// and is written by Xiang Fan who agreed to using it in this library.
@@ -284,60 +309,37 @@ struct is_constructible_object_type
: is_constructible_object_type_impl<BasicJsonType,
ConstructibleObjectType> {};
template<typename BasicJsonType, typename CompatibleStringType,
typename = void>
struct is_compatible_string_type_impl : std::false_type {};
template<typename BasicJsonType, typename CompatibleStringType>
struct is_compatible_string_type_impl <
BasicJsonType, CompatibleStringType,
enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
value_type_t, CompatibleStringType>::value >>
struct is_compatible_string_type
{
static constexpr auto value =
is_constructible<typename BasicJsonType::string_t, CompatibleStringType>::value;
};
template<typename BasicJsonType, typename ConstructibleStringType>
struct is_compatible_string_type
: is_compatible_string_type_impl<BasicJsonType, ConstructibleStringType> {};
template<typename BasicJsonType, typename ConstructibleStringType,
typename = void>
struct is_constructible_string_type_impl : std::false_type {};
template<typename BasicJsonType, typename ConstructibleStringType>
struct is_constructible_string_type_impl <
BasicJsonType, ConstructibleStringType,
enable_if_t<is_detected_exact<typename BasicJsonType::string_t::value_type,
value_type_t, ConstructibleStringType>::value >>
struct is_constructible_string_type
{
static constexpr auto value =
is_constructible<ConstructibleStringType,
typename BasicJsonType::string_t>::value;
};
template<typename BasicJsonType, typename ConstructibleStringType>
struct is_constructible_string_type
: is_constructible_string_type_impl<BasicJsonType, ConstructibleStringType> {};
template<typename BasicJsonType, typename CompatibleArrayType, typename = void>
struct is_compatible_array_type_impl : std::false_type {};
template<typename BasicJsonType, typename CompatibleArrayType>
struct is_compatible_array_type_impl <
BasicJsonType, CompatibleArrayType,
enable_if_t < is_detected<value_type_t, CompatibleArrayType>::value&&
enable_if_t <
is_detected<iterator_t, CompatibleArrayType>::value&&
// This is needed because json_reverse_iterator has a ::iterator type...
// Therefore it is detected as a CompatibleArrayType.
// The real fix would be to have an Iterable concept.
!is_iterator_traits <
iterator_traits<CompatibleArrayType >>::value >>
is_iterator_traits<iterator_traits<detected_t<iterator_t, CompatibleArrayType>>>::value&&
// special case for types like std::filesystem::path whose iterator's value_type are themselves
// c.f. https://github.com/nlohmann/json/pull/3073
!std::is_same<CompatibleArrayType, detected_t<range_value_t, CompatibleArrayType>>::value >>
{
static constexpr bool value =
is_constructible<BasicJsonType,
typename CompatibleArrayType::value_type>::value;
range_value_t<CompatibleArrayType>>::value;
};
template<typename BasicJsonType, typename CompatibleArrayType>
@@ -359,28 +361,29 @@ struct is_constructible_array_type_impl <
BasicJsonType, ConstructibleArrayType,
enable_if_t < !std::is_same<ConstructibleArrayType,
typename BasicJsonType::value_type>::value&&
!is_compatible_string_type<BasicJsonType, ConstructibleArrayType>::value&&
is_default_constructible<ConstructibleArrayType>::value&&
(std::is_move_assignable<ConstructibleArrayType>::value ||
std::is_copy_assignable<ConstructibleArrayType>::value)&&
is_detected<value_type_t, ConstructibleArrayType>::value&&
is_detected<iterator_t, ConstructibleArrayType>::value&&
is_complete_type <
detected_t<value_type_t, ConstructibleArrayType >>::value >>
is_iterator_traits<iterator_traits<detected_t<iterator_t, ConstructibleArrayType>>>::value&&
is_detected<range_value_t, ConstructibleArrayType>::value&&
// special case for types like std::filesystem::path whose iterator's value_type are themselves
// c.f. https://github.com/nlohmann/json/pull/3073
!std::is_same<ConstructibleArrayType, detected_t<range_value_t, ConstructibleArrayType>>::value&&
is_complete_type <
detected_t<range_value_t, ConstructibleArrayType >>::value >>
{
static constexpr bool value =
// This is needed because json_reverse_iterator has a ::iterator type,
// furthermore, std::back_insert_iterator (and other iterators) have a
// base class `iterator`... Therefore it is detected as a
// ConstructibleArrayType. The real fix would be to have an Iterable
// concept.
!is_iterator_traits<iterator_traits<ConstructibleArrayType>>::value &&
using value_type = range_value_t<ConstructibleArrayType>;
(std::is_same<typename ConstructibleArrayType::value_type,
typename BasicJsonType::array_t::value_type>::value ||
has_from_json<BasicJsonType,
typename ConstructibleArrayType::value_type>::value ||
has_non_default_from_json <
BasicJsonType, typename ConstructibleArrayType::value_type >::value);
static constexpr bool value =
std::is_same<value_type,
typename BasicJsonType::array_t::value_type>::value ||
has_from_json<BasicJsonType,
value_type>::value ||
has_non_default_from_json <
BasicJsonType,
value_type >::value;
};
template<typename BasicJsonType, typename ConstructibleArrayType>

7
include/nlohmann/detail/output/serializer.hpp
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@@ -811,8 +811,8 @@ class serializer
// erase thousands separator
if (thousands_sep != '\0')
{
auto* const end = std::remove(number_buffer.begin(),
number_buffer.begin() + len, thousands_sep);
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::remove returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto end = std::remove(number_buffer.begin(), number_buffer.begin() + len, thousands_sep);
std::fill(end, number_buffer.end(), '\0');
JSON_ASSERT((end - number_buffer.begin()) <= len);
len = (end - number_buffer.begin());
@@ -821,7 +821,8 @@ class serializer
// convert decimal point to '.'
if (decimal_point != '\0' && decimal_point != '.')
{
auto* const dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
// NOLINTNEXTLINE(readability-qualified-auto,llvm-qualified-auto): std::find returns an iterator, see https://github.com/nlohmann/json/issues/3081
const auto dec_pos = std::find(number_buffer.begin(), number_buffer.end(), decimal_point);
if (dec_pos != number_buffer.end())
{
*dec_pos = '.';

26
include/nlohmann/json.hpp
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@@ -1,7 +1,7 @@
/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++
| | |__ | | | | | | version 3.10.2
| | |__ | | | | | | version 3.10.4
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@@ -32,7 +32,7 @@ SOFTWARE.
#define NLOHMANN_JSON_VERSION_MAJOR 3
#define NLOHMANN_JSON_VERSION_MINOR 10
#define NLOHMANN_JSON_VERSION_PATCH 2
#define NLOHMANN_JSON_VERSION_PATCH 4
#include <algorithm> // all_of, find, for_each
#include <cstddef> // nullptr_t, ptrdiff_t, size_t
@@ -1065,7 +1065,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
object = nullptr; // silence warning, see #821
if (JSON_HEDLEY_UNLIKELY(t == value_t::null))
{
JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.10.2", basic_json())); // LCOV_EXCL_LINE
JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.10.4", basic_json())); // LCOV_EXCL_LINE
}
break;
}
@@ -3069,7 +3069,7 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
ValueType get_impl(detail::priority_tag<0> /*unused*/) const noexcept(noexcept(
JSONSerializer<ValueType>::from_json(std::declval<const basic_json_t&>(), std::declval<ValueType&>())))
{
ValueType ret{};
auto ret = ValueType();
JSONSerializer<ValueType>::from_json(*this, ret);
return ret;
}
@@ -3695,15 +3695,25 @@ class basic_json // NOLINT(cppcoreguidelines-special-member-functions,hicpp-spec
if (idx >= m_value.array->size())
{
#if JSON_DIAGNOSTICS
// remember array size before resizing
const auto previous_size = m_value.array->size();
// remember array size & capacity before resizing
const auto old_size = m_value.array->size();
const auto old_capacity = m_value.array->capacity();
#endif
m_value.array->resize(idx + 1);
#if JSON_DIAGNOSTICS
// set parent for values added above
set_parents(begin() + static_cast<typename iterator::difference_type>(previous_size), static_cast<typename iterator::difference_type>(idx + 1 - previous_size));
if (JSON_HEDLEY_UNLIKELY(m_value.array->capacity() != old_capacity))
{
// capacity has changed: update all parents
set_parents();
}
else
{
// set parent for values added above
set_parents(begin() + static_cast<typename iterator::difference_type>(old_size), static_cast<typename iterator::difference_type>(idx + 1 - old_size));
}
#endif
assert_invariant();
}
return m_value.array->operator[](idx);