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nlohmann-json: 3.4.0 -> 3.5.0

Browse source 
https://github.com/nlohmann/json/releases/tag/v3.5.0
This commit is contained in:
Will Dietz 2018-12-21 22:38:06 -06:00
parent e78511743e
commit 3f8b78a84d
1 changed files with 276 additions and 144 deletions
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268
src/nlohmann/json.hpp
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@ -1,7 +1,7 @@
/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++
| | |__ | | | | | | version 3.4.0
| | |__ | | | | | | version 3.5.0
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -31,7 +31,7 @@ SOFTWARE.
#define NLOHMANN_JSON_HPP
#define NLOHMANN_JSON_VERSION_MAJOR 3
#define NLOHMANN_JSON_VERSION_MINOR 4
#define NLOHMANN_JSON_VERSION_MINOR 5
#define NLOHMANN_JSON_VERSION_PATCH 0
#include <algorithm> // all_of, find, for_each
@ -41,7 +41,7 @@ SOFTWARE.
#include <functional> // hash, less
#include <initializer_list> // initializer_list
#include <iosfwd> // istream, ostream
#include <iterator> // iterator_traits, random_access_iterator_tag
#include <iterator> // random_access_iterator_tag
#include <numeric> // accumulate
#include <string> // string, stoi, to_string
#include <utility> // declval, forward, move, pair, swap
@ -324,12 +324,10 @@ constexpr T static_const<T>::value;
// #include <nlohmann/json_fwd.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/meta/detected.hpp>
// #include <nlohmann/detail/iterators/iterator_traits.hpp>
#include <type_traits>
#include <iterator> // random_access_iterator_tag
// #include <nlohmann/detail/meta/void_t.hpp>
@ -346,6 +344,63 @@ template <typename ...Ts> using void_t = typename make_void<Ts...>::type;
} // namespace detail
} // namespace nlohmann
// #include <nlohmann/detail/meta/cpp_future.hpp>
namespace nlohmann
{
namespace detail
{
template <typename It, typename = void>
struct iterator_types {};
template <typename It>
struct iterator_types <
It,
void_t<typename It::difference_type, typename It::value_type, typename It::pointer,
typename It::reference, typename It::iterator_category >>
{
using difference_type = typename It::difference_type;
using value_type = typename It::value_type;
using pointer = typename It::pointer;
using reference = typename It::reference;
using iterator_category = typename It::iterator_category;
};
// This is required as some compilers implement std::iterator_traits in a way that
// doesn't work with SFINAE. See https://github.com/nlohmann/json/issues/1341.
template <typename T, typename = void>
struct iterator_traits
{
};
template <typename T>
struct iterator_traits < T, enable_if_t < !std::is_pointer<T>::value >>
: iterator_types<T>
{
};
template <typename T>
struct iterator_traits<T*, enable_if_t<std::is_object<T>::value>>
{
using iterator_category = std::random_access_iterator_tag;
using value_type = T;
using difference_type = ptrdiff_t;
using pointer = T*;
using reference = T&;
};
}
}
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/meta/detected.hpp>
#include <type_traits>
// #include <nlohmann/detail/meta/void_t.hpp>
// http://en.cppreference.com/w/cpp/experimental/is_detected
namespace nlohmann
@ -522,10 +577,10 @@ template <typename T, typename = void>
struct is_iterator_traits : std::false_type {};
template <typename T>
struct is_iterator_traits<std::iterator_traits<T>>
struct is_iterator_traits<iterator_traits<T>>
{
private:
using traits = std::iterator_traits<T>;
using traits = iterator_traits<T>;
public:
static constexpr auto value =
@ -642,7 +697,7 @@ struct is_compatible_array_type_impl <
// Therefore it is detected as a CompatibleArrayType.
// The real fix would be to have an Iterable concept.
not is_iterator_traits<
std::iterator_traits<CompatibleArrayType>>::value >>
iterator_traits<CompatibleArrayType>>::value >>
{
static constexpr bool value =
std::is_constructible<BasicJsonType,
@ -679,7 +734,7 @@ struct is_constructible_array_type_impl <
// Therefore it is detected as a ConstructibleArrayType.
// The real fix would be to have an Iterable concept.
not is_iterator_traits <
std::iterator_traits<ConstructibleArrayType >>::value and
iterator_traits<ConstructibleArrayType >>::value and
(std::is_same<typename ConstructibleArrayType::value_type, typename BasicJsonType::array_t::value_type>::value or
has_from_json<BasicJsonType,
@ -1594,26 +1649,24 @@ constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::va
#include <cstddef> // size_t
#include <string> // string, to_string
#include <iterator> // input_iterator_tag
#include <tuple> // tuple_size, get, tuple_element
// #include <nlohmann/detail/value_t.hpp>
// #include <nlohmann/detail/meta/type_traits.hpp>
namespace nlohmann
{
namespace detail
{
/// proxy class for the items() function
template<typename IteratorType> class iteration_proxy
template <typename IteratorType> class iteration_proxy_value
{
private:
/// helper class for iteration
class iteration_proxy_internal
{
public:
using difference_type = std::ptrdiff_t;
using value_type = iteration_proxy_internal;
using pointer = iteration_proxy_internal*;
using reference = iteration_proxy_internal&;
using value_type = iteration_proxy_value;
using pointer = value_type * ;
using reference = value_type & ;
using iterator_category = std::input_iterator_tag;
private:
@ -1629,16 +1682,16 @@ template<typename IteratorType> class iteration_proxy
const std::string empty_str = "";
public:
explicit iteration_proxy_internal(IteratorType it) noexcept : anchor(it) {}
explicit iteration_proxy_value(IteratorType it) noexcept : anchor(it) {}
/// dereference operator (needed for range-based for)
iteration_proxy_internal& operator*()
iteration_proxy_value& operator*()
{
return *this;
}
/// increment operator (needed for range-based for)
iteration_proxy_internal& operator++()
iteration_proxy_value& operator++()
{
++anchor;
++array_index;
@ -1647,13 +1700,13 @@ template<typename IteratorType> class iteration_proxy
}
/// equality operator (needed for InputIterator)
bool operator==(const iteration_proxy_internal& o) const noexcept
bool operator==(const iteration_proxy_value& o) const noexcept
{
return anchor == o.anchor;
}
/// inequality operator (needed for range-based for)
bool operator!=(const iteration_proxy_internal& o) const noexcept
bool operator!=(const iteration_proxy_value& o) const noexcept
{
return anchor != o.anchor;
}
@ -1691,8 +1744,12 @@ template<typename IteratorType> class iteration_proxy
{
return anchor.value();
}
};
};
/// proxy class for the items() function
template<typename IteratorType> class iteration_proxy
{
private:
/// the container to iterate
typename IteratorType::reference container;
@ -1702,20 +1759,55 @@ template<typename IteratorType> class iteration_proxy
: container(cont) {}
/// return iterator begin (needed for range-based for)
iteration_proxy_internal begin() noexcept
iteration_proxy_value<IteratorType> begin() noexcept
{
return iteration_proxy_internal(container.begin());
return iteration_proxy_value<IteratorType>(container.begin());
}
/// return iterator end (needed for range-based for)
iteration_proxy_internal end() noexcept
iteration_proxy_value<IteratorType> end() noexcept
{
return iteration_proxy_internal(container.end());
return iteration_proxy_value<IteratorType>(container.end());
}
};
// Structured Bindings Support
// For further reference see https://blog.tartanllama.xyz/structured-bindings/
// And see https://github.com/nlohmann/json/pull/1391
template <std::size_t N, typename IteratorType, enable_if_t<N == 0, int> = 0>
auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.key())
{
return i.key();
}
// Structured Bindings Support
// For further reference see https://blog.tartanllama.xyz/structured-bindings/
// And see https://github.com/nlohmann/json/pull/1391
template <std::size_t N, typename IteratorType, enable_if_t<N == 1, int> = 0>
auto get(const nlohmann::detail::iteration_proxy_value<IteratorType>& i) -> decltype(i.value())
{
return i.value();
}
} // namespace detail
} // namespace nlohmann
// The Addition to the STD Namespace is required to add
// Structured Bindings Support to the iteration_proxy_value class
// For further reference see https://blog.tartanllama.xyz/structured-bindings/
// And see https://github.com/nlohmann/json/pull/1391
namespace std
{
template <typename IteratorType>
class tuple_size<::nlohmann::detail::iteration_proxy_value<IteratorType>>
: public std::integral_constant<std::size_t, 2> {};
template <std::size_t N, typename IteratorType>
class tuple_element<N, ::nlohmann::detail::iteration_proxy_value<IteratorType >>
{
public:
using type = decltype(
get<N>(std::declval <
::nlohmann::detail::iteration_proxy_value<IteratorType >> ()));
};
}
namespace nlohmann
{
@ -1994,9 +2086,9 @@ void to_json(BasicJsonType& j, typename BasicJsonType::object_t&& obj)
template <
typename BasicJsonType, typename T, std::size_t N,
enable_if_t<not std::is_constructible<typename BasicJsonType::string_t,
const T (&)[N]>::value,
const T(&)[N]>::value,
int> = 0 >
void to_json(BasicJsonType& j, const T (&arr)[N])
void to_json(BasicJsonType& j, const T(&arr)[N])
{
external_constructor<value_t::array>::construct(j, arr);
}
@ -2004,21 +2096,21 @@ void to_json(BasicJsonType& j, const T (&arr)[N])
template<typename BasicJsonType, typename... Args>
void to_json(BasicJsonType& j, const std::pair<Args...>& p)
{
j = {p.first, p.second};
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, typename iteration_proxy<typename BasicJsonType::iterator>::iteration_proxy_internal>::value, int> = 0>
template < typename BasicJsonType, typename T,
enable_if_t<std::is_same<T, iteration_proxy_value<typename BasicJsonType::iterator>>::value, int> = 0>
void to_json(BasicJsonType& j, const T& b)
{
j = {{b.key(), b.value()}};
j = { {b.key(), b.value()} };
}
template<typename BasicJsonType, typename Tuple, std::size_t... Idx>
void to_json_tuple_impl(BasicJsonType& j, const Tuple& t, index_sequence<Idx...> /*unused*/)
{
j = {std::get<Idx>(t)...};
j = { std::get<Idx>(t)... };
}
template<typename BasicJsonType, typename... Args>
@ -2058,6 +2150,7 @@ constexpr const auto& to_json = detail::static_const<detail::to_json_fn>::value;
#include <string> // string, char_traits
#include <type_traits> // enable_if, is_base_of, is_pointer, is_integral, remove_pointer
#include <utility> // pair, declval
#include <cstdio> //FILE *
// #include <nlohmann/detail/macro_scope.hpp>
@ -2094,6 +2187,27 @@ struct input_adapter_protocol
/// a type to simplify interfaces
using input_adapter_t = std::shared_ptr<input_adapter_protocol>;
/*!
Input adapter for stdio file access. This adapter read only 1 byte and do not use any
buffer. This adapter is a very low level adapter.
*/
class file_input_adapter : public input_adapter_protocol
{
public:
explicit file_input_adapter(std::FILE* f) noexcept
: m_file(f)
{}
std::char_traits<char>::int_type get_character() noexcept override
{
return std::fgetc(m_file);
}
private:
/// the file pointer to read from
std::FILE* m_file;
};
/*!
Input adapter for a (caching) istream. Ignores a UFT Byte Order Mark at
beginning of input. Does not support changing the underlying std::streambuf
@ -2109,8 +2223,8 @@ class input_stream_adapter : public input_adapter_protocol
~input_stream_adapter() override
{
// clear stream flags; we use underlying streambuf I/O, do not
// maintain ifstream flags
is.clear();
// maintain ifstream flags, except eof
is.clear(is.rdstate() & std::ios::eofbit);
}
explicit input_stream_adapter(std::istream& i)
@ -2128,7 +2242,13 @@ class input_stream_adapter : public input_adapter_protocol
// end up as the same value, eg. 0xFFFFFFFF.
std::char_traits<char>::int_type get_character() override
{
return sb.sbumpc();
auto res = sb.sbumpc();
// set eof manually, as we don't use the istream interface.
if (res == EOF)
{
is.clear(is.rdstate() | std::ios::eofbit);
}
return res;
}
private:
@ -2336,7 +2456,8 @@ class input_adapter
{
public:
// native support
input_adapter(std::FILE* file)
: ia(std::make_shared<file_input_adapter>(file)) {}
/// input adapter for input stream
input_adapter(std::istream& i)
: ia(std::make_shared<input_stream_adapter>(i)) {}
@ -2380,7 +2501,7 @@ class input_adapter
/// input adapter for iterator range with contiguous storage
template<class IteratorType,
typename std::enable_if<
std::is_same<typename std::iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value,
std::is_same<typename iterator_traits<IteratorType>::iterator_category, std::random_access_iterator_tag>::value,
int>::type = 0>
input_adapter(IteratorType first, IteratorType last)
{
@ -2399,7 +2520,7 @@ class input_adapter
// assertion to check that each element is 1 byte long
static_assert(
sizeof(typename std::iterator_traits<IteratorType>::value_type) == 1,
sizeof(typename iterator_traits<IteratorType>::value_type) == 1,
"each element in the iterator range must have the size of 1 byte");
const auto len = static_cast<size_t>(std::distance(first, last));
@ -2423,7 +2544,7 @@ class input_adapter
/// input adapter for contiguous container
template<class ContiguousContainer, typename
std::enable_if<not std::is_pointer<ContiguousContainer>::value and
std::is_base_of<std::random_access_iterator_tag, typename std::iterator_traits<decltype(std::begin(std::declval<ContiguousContainer const>()))>::iterator_category>::value,
std::is_base_of<std::random_access_iterator_tag, typename iterator_traits<decltype(std::begin(std::declval<ContiguousContainer const>()))>::iterator_category>::value,
int>::type = 0>
input_adapter(const ContiguousContainer& c)
: input_adapter(std::begin(c), std::end(c)) {}
@ -3806,7 +3927,7 @@ scan_number_done:
{
// escape control characters
char cs[9];
snprintf(cs, 9, "<U+%.4X>", static_cast<unsigned char>(c));
(std::snprintf)(cs, 9, "<U+%.4X>", static_cast<unsigned char>(c));
result += cs;
}
else
@ -5486,24 +5607,21 @@ namespace detail
{
// forward declare, to be able to friend it later on
template<typename IteratorType> class iteration_proxy;
template<typename IteratorType> class iteration_proxy_value;
/*!
@brief a template for a bidirectional iterator for the @ref basic_json class
This class implements a both iterators (iterator and const_iterator) for the
@ref basic_json class.
@note An iterator is called *initialized* when a pointer to a JSON value has
been set (e.g., by a constructor or a copy assignment). If the iterator is
default-constructed, it is *uninitialized* and most methods are undefined.
**The library uses assertions to detect calls on uninitialized iterators.**
@requirement The class satisfies the following concept requirements:
-
[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
The iterator that can be moved can be moved in both directions (i.e.
incremented and decremented).
@since version 1.0.0, simplified in version 2.0.9, change to bidirectional
iterators in version 3.0.0 (see https://github.com/nlohmann/json/issues/593)
*/
@ -5514,6 +5632,7 @@ class iter_impl
friend iter_impl<typename std::conditional<std::is_const<BasicJsonType>::value, typename std::remove_const<BasicJsonType>::type, const BasicJsonType>::type>;
friend BasicJsonType;
friend iteration_proxy<iter_impl>;
friend iteration_proxy_value<iter_impl>;
using object_t = typename BasicJsonType::object_t;
using array_t = typename BasicJsonType::array_t;
@ -6081,7 +6200,6 @@ class iter_impl
};
} // namespace detail
} // namespace nlohmann
// #include <nlohmann/detail/iterators/iteration_proxy.hpp>
// #include <nlohmann/detail/iterators/json_reverse_iterator.hpp>
@ -6576,7 +6694,7 @@ class binary_reader
case 0x08: // boolean
{
return sax->boolean(static_cast<bool>(get()));
return sax->boolean(get() != 0);
}
case 0x0A: // null
@ -6599,7 +6717,7 @@ class binary_reader
default: // anything else not supported (yet)
{
char cr[3];
snprintf(cr, sizeof(cr), "%.2hhX", static_cast<unsigned char>(element_type));
(std::snprintf)(cr, sizeof(cr), "%.2hhX", static_cast<unsigned char>(element_type));
return sax->parse_error(element_type_parse_position, std::string(cr), parse_error::create(114, element_type_parse_position, "Unsupported BSON record type 0x" + std::string(cr)));
}
}
@ -6635,7 +6753,10 @@ class binary_reader
if (not is_array)
{
sax->key(key);
if (not sax->key(key))
{
return false;
}
}
if (JSON_UNLIKELY(not parse_bson_element_internal(element_type, element_type_parse_position)))
@ -8253,7 +8374,7 @@ class binary_reader
std::string get_token_string() const
{
char cr[3];
snprintf(cr, 3, "%.2hhX", static_cast<unsigned char>(current));
(std::snprintf)(cr, 3, "%.2hhX", static_cast<unsigned char>(current));
return std::string{cr};
}
@ -11134,13 +11255,13 @@ class serializer
{
if (codepoint <= 0xFFFF)
{
std::snprintf(string_buffer.data() + bytes, 7, "\\u%04x",
(std::snprintf)(string_buffer.data() + bytes, 7, "\\u%04x",
static_cast<uint16_t>(codepoint));
bytes += 6;
}
else
{
std::snprintf(string_buffer.data() + bytes, 13, "\\u%04x\\u%04x",
(std::snprintf)(string_buffer.data() + bytes, 13, "\\u%04x\\u%04x",
static_cast<uint16_t>(0xD7C0 + (codepoint >> 10)),
static_cast<uint16_t>(0xDC00 + (codepoint & 0x3FF)));
bytes += 12;
@ -11178,7 +11299,7 @@ class serializer
case error_handler_t::strict:
{
std::string sn(3, '\0');
snprintf(&sn[0], sn.size(), "%.2X", byte);
(std::snprintf)(&sn[0], sn.size(), "%.2X", byte);
JSON_THROW(type_error::create(316, "invalid UTF-8 byte at index " + std::to_string(i) + ": 0x" + sn));
}
@ -11259,7 +11380,7 @@ class serializer
case error_handler_t::strict:
{
std::string sn(3, '\0');
snprintf(&sn[0], sn.size(), "%.2X", static_cast<uint8_t>(s.back()));
(std::snprintf)(&sn[0], sn.size(), "%.2X", static_cast<uint8_t>(s.back()));
JSON_THROW(type_error::create(316, "incomplete UTF-8 string; last byte: 0x" + sn));
}
@ -11378,7 +11499,7 @@ class serializer
static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
// the actual conversion
std::ptrdiff_t len = snprintf(number_buffer.data(), number_buffer.size(), "%.*g", d, x);
std::ptrdiff_t len = (std::snprintf)(number_buffer.data(), number_buffer.size(), "%.*g", d, x);
// negative value indicates an error
assert(len > 0);
@ -13208,7 +13329,7 @@ class basic_json
object = nullptr; // silence warning, see #821
if (JSON_UNLIKELY(t == value_t::null))
{
JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.4.0")); // LCOV_EXCL_LINE
JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.5.0")); // LCOV_EXCL_LINE
}
break;
}
@ -16599,9 +16720,20 @@ class basic_json
Range-based for loop with `items()` function:
@code{cpp}
for (auto it : j_object.items())
for (auto& el : j_object.items())
{
std::cout << "key: " << it.key() << ", value:" << it.value() << '\n';
std::cout << "key: " << el.key() << ", value:" << el.value() << '\n';
}
@endcode
The `items()` function also allows to use
[structured bindings](https://en.cppreference.com/w/cpp/language/structured_binding)
(C++17):
@code{cpp}
for (auto& [key, val] : j_object.items())
{
std::cout << "key: " << key << ", value:" << val << '\n';
}
@endcode
@ -16619,7 +16751,7 @@ class basic_json
@complexity Constant.
@since version 3.1.0.
@since version 3.1.0, structured bindings support since 3.5.0.
*/
iteration_proxy<iterator> items() noexcept
{
@ -20110,7 +20242,7 @@ class basic_json
Thereby, `Target` is the current object; that is, the patch is applied to
the current value.
@param[in] patch the patch to apply
@param[in] apply_patch the patch to apply
@complexity Linear in the lengths of @a patch.
@ -20122,15 +20254,15 @@ class basic_json
@since version 3.0.0
*/
void merge_patch(const basic_json& patch)
void merge_patch(const basic_json& apply_patch)
{
if (patch.is_object())
if (apply_patch.is_object())
{
if (not is_object())
{
*this = object();
}
for (auto it = patch.begin(); it != patch.end(); ++it)
for (auto it = apply_patch.begin(); it != apply_patch.end(); ++it)
{
if (it.value().is_null())
{
@ -20144,7 +20276,7 @@ class basic_json
}
else
{
*this = patch;
*this = apply_patch;
}
}