mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2025-06-08 07:06:52 +02:00
start work on webconsole with templates
Signed-off-by: R4SAS <r4sas@i2pmail.org>
This commit is contained in:
R4SAS
parent
47460d86b2
commit
a843be75f3
60 changed files with 24925 additions and 38 deletions
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@ -0,0 +1,25 @@
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#pragma once
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#include <nlohmann/detail/iterators/primitive_iterator.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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/*!
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@brief an iterator value
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@note This structure could easily be a union, but MSVC currently does not allow
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unions members with complex constructors, see https://github.com/nlohmann/json/pull/105.
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*/
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template<typename BasicJsonType> struct internal_iterator
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{
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/// iterator for JSON objects
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typename BasicJsonType::object_t::iterator object_iterator {};
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/// iterator for JSON arrays
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typename BasicJsonType::array_t::iterator array_iterator {};
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/// generic iterator for all other types
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primitive_iterator_t primitive_iterator {};
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};
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} // namespace detail
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} // namespace nlohmann
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739
libi2pd_webconsole/nlohmann/detail/iterators/iter_impl.hpp
Normal file
739
libi2pd_webconsole/nlohmann/detail/iterators/iter_impl.hpp
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#pragma once
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#include <iterator> // iterator, random_access_iterator_tag, bidirectional_iterator_tag, advance, next
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#include <type_traits> // conditional, is_const, remove_const
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#include <nlohmann/detail/exceptions.hpp>
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#include <nlohmann/detail/iterators/internal_iterator.hpp>
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#include <nlohmann/detail/iterators/primitive_iterator.hpp>
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#include <nlohmann/detail/macro_scope.hpp>
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#include <nlohmann/detail/meta/cpp_future.hpp>
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#include <nlohmann/detail/meta/type_traits.hpp>
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#include <nlohmann/detail/value_t.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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// forward declare, to be able to friend it later on
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template<typename IteratorType> class iteration_proxy;
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template<typename IteratorType> class iteration_proxy_value;
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/*!
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@brief a template for a bidirectional iterator for the @ref basic_json class
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This class implements a both iterators (iterator and const_iterator) for the
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@ref basic_json class.
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@note An iterator is called *initialized* when a pointer to a JSON value has
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been set (e.g., by a constructor or a copy assignment). If the iterator is
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default-constructed, it is *uninitialized* and most methods are undefined.
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**The library uses assertions to detect calls on uninitialized iterators.**
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@requirement The class satisfies the following concept requirements:
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-
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[BidirectionalIterator](https://en.cppreference.com/w/cpp/named_req/BidirectionalIterator):
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The iterator that can be moved can be moved in both directions (i.e.
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incremented and decremented).
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@since version 1.0.0, simplified in version 2.0.9, change to bidirectional
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iterators in version 3.0.0 (see https://github.com/nlohmann/json/issues/593)
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*/
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template<typename BasicJsonType>
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class iter_impl // NOLINT(cppcoreguidelines-special-member-functions,hicpp-special-member-functions)
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{
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/// the iterator with BasicJsonType of different const-ness
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using other_iter_impl = iter_impl<typename std::conditional<std::is_const<BasicJsonType>::value, typename std::remove_const<BasicJsonType>::type, const BasicJsonType>::type>;
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/// allow basic_json to access private members
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friend other_iter_impl;
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friend BasicJsonType;
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friend iteration_proxy<iter_impl>;
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friend iteration_proxy_value<iter_impl>;
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using object_t = typename BasicJsonType::object_t;
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using array_t = typename BasicJsonType::array_t;
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// make sure BasicJsonType is basic_json or const basic_json
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static_assert(is_basic_json<typename std::remove_const<BasicJsonType>::type>::value,
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"iter_impl only accepts (const) basic_json");
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public:
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/// The std::iterator class template (used as a base class to provide typedefs) is deprecated in C++17.
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/// The C++ Standard has never required user-defined iterators to derive from std::iterator.
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/// A user-defined iterator should provide publicly accessible typedefs named
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/// iterator_category, value_type, difference_type, pointer, and reference.
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/// Note that value_type is required to be non-const, even for constant iterators.
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using iterator_category = std::bidirectional_iterator_tag;
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/// the type of the values when the iterator is dereferenced
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using value_type = typename BasicJsonType::value_type;
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/// a type to represent differences between iterators
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using difference_type = typename BasicJsonType::difference_type;
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/// defines a pointer to the type iterated over (value_type)
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using pointer = typename std::conditional<std::is_const<BasicJsonType>::value,
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typename BasicJsonType::const_pointer,
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typename BasicJsonType::pointer>::type;
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/// defines a reference to the type iterated over (value_type)
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using reference =
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typename std::conditional<std::is_const<BasicJsonType>::value,
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typename BasicJsonType::const_reference,
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typename BasicJsonType::reference>::type;
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iter_impl() = default;
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~iter_impl() = default;
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iter_impl(iter_impl&&) noexcept = default;
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iter_impl& operator=(iter_impl&&) noexcept = default;
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/*!
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@brief constructor for a given JSON instance
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@param[in] object pointer to a JSON object for this iterator
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@pre object != nullptr
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@post The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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explicit iter_impl(pointer object) noexcept : m_object(object)
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{
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JSON_ASSERT(m_object != nullptr);
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switch (m_object->m_type)
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{
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case value_t::object:
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{
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m_it.object_iterator = typename object_t::iterator();
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break;
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}
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case value_t::array:
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{
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m_it.array_iterator = typename array_t::iterator();
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break;
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}
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case value_t::null:
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case value_t::string:
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case value_t::boolean:
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case value_t::number_integer:
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case value_t::number_unsigned:
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case value_t::number_float:
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case value_t::binary:
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case value_t::discarded:
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default:
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{
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m_it.primitive_iterator = primitive_iterator_t();
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break;
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}
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}
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}
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/*!
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@note The conventional copy constructor and copy assignment are implicitly
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defined. Combined with the following converting constructor and
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assignment, they support: (1) copy from iterator to iterator, (2)
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copy from const iterator to const iterator, and (3) conversion from
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iterator to const iterator. However conversion from const iterator
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to iterator is not defined.
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*/
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/*!
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@brief const copy constructor
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@param[in] other const iterator to copy from
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@note This copy constructor had to be defined explicitly to circumvent a bug
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occurring on msvc v19.0 compiler (VS 2015) debug build. For more
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information refer to: https://github.com/nlohmann/json/issues/1608
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*/
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iter_impl(const iter_impl<const BasicJsonType>& other) noexcept
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: m_object(other.m_object), m_it(other.m_it)
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{}
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/*!
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@brief converting assignment
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@param[in] other const iterator to copy from
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@return const/non-const iterator
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@note It is not checked whether @a other is initialized.
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*/
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iter_impl& operator=(const iter_impl<const BasicJsonType>& other) noexcept
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{
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if (&other != this)
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{
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m_object = other.m_object;
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m_it = other.m_it;
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}
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return *this;
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}
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/*!
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@brief converting constructor
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@param[in] other non-const iterator to copy from
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@note It is not checked whether @a other is initialized.
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*/
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iter_impl(const iter_impl<typename std::remove_const<BasicJsonType>::type>& other) noexcept
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: m_object(other.m_object), m_it(other.m_it)
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{}
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/*!
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@brief converting assignment
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@param[in] other non-const iterator to copy from
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@return const/non-const iterator
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@note It is not checked whether @a other is initialized.
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*/
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iter_impl& operator=(const iter_impl<typename std::remove_const<BasicJsonType>::type>& other) noexcept // NOLINT(cert-oop54-cpp)
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{
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m_object = other.m_object;
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m_it = other.m_it;
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return *this;
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}
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JSON_PRIVATE_UNLESS_TESTED:
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/*!
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@brief set the iterator to the first value
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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void set_begin() noexcept
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{
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JSON_ASSERT(m_object != nullptr);
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switch (m_object->m_type)
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{
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case value_t::object:
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{
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m_it.object_iterator = m_object->m_value.object->begin();
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break;
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}
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case value_t::array:
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{
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m_it.array_iterator = m_object->m_value.array->begin();
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break;
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}
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case value_t::null:
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{
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// set to end so begin()==end() is true: null is empty
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m_it.primitive_iterator.set_end();
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break;
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}
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case value_t::string:
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case value_t::boolean:
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case value_t::number_integer:
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case value_t::number_unsigned:
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case value_t::number_float:
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case value_t::binary:
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case value_t::discarded:
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default:
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{
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m_it.primitive_iterator.set_begin();
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break;
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}
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}
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}
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/*!
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@brief set the iterator past the last value
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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void set_end() noexcept
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{
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JSON_ASSERT(m_object != nullptr);
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switch (m_object->m_type)
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{
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case value_t::object:
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{
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m_it.object_iterator = m_object->m_value.object->end();
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break;
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}
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case value_t::array:
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{
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m_it.array_iterator = m_object->m_value.array->end();
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break;
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}
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case value_t::null:
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case value_t::string:
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case value_t::boolean:
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case value_t::number_integer:
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case value_t::number_unsigned:
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case value_t::number_float:
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case value_t::binary:
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case value_t::discarded:
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default:
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{
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m_it.primitive_iterator.set_end();
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break;
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}
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}
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}
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public:
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/*!
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@brief return a reference to the value pointed to by the iterator
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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reference operator*() const
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{
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JSON_ASSERT(m_object != nullptr);
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switch (m_object->m_type)
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{
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case value_t::object:
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{
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JSON_ASSERT(m_it.object_iterator != m_object->m_value.object->end());
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return m_it.object_iterator->second;
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}
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case value_t::array:
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{
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JSON_ASSERT(m_it.array_iterator != m_object->m_value.array->end());
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return *m_it.array_iterator;
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}
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case value_t::null:
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JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
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case value_t::string:
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case value_t::boolean:
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case value_t::number_integer:
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case value_t::number_unsigned:
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case value_t::number_float:
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case value_t::binary:
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case value_t::discarded:
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default:
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{
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if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
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{
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return *m_object;
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}
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JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
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}
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}
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}
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/*!
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@brief dereference the iterator
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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pointer operator->() const
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{
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JSON_ASSERT(m_object != nullptr);
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switch (m_object->m_type)
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{
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case value_t::object:
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{
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JSON_ASSERT(m_it.object_iterator != m_object->m_value.object->end());
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return &(m_it.object_iterator->second);
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}
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case value_t::array:
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{
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JSON_ASSERT(m_it.array_iterator != m_object->m_value.array->end());
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return &*m_it.array_iterator;
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}
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case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
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case value_t::binary:
|
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case value_t::discarded:
|
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default:
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{
|
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if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.is_begin()))
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||||
{
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return m_object;
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}
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JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
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}
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}
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}
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/*!
|
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@brief post-increment (it++)
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
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*/
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iter_impl const operator++(int) // NOLINT(readability-const-return-type)
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{
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auto result = *this;
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++(*this);
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return result;
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}
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||||
|
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/*!
|
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@brief pre-increment (++it)
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@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
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*/
|
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iter_impl& operator++()
|
||||
{
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||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
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switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
{
|
||||
std::advance(m_it.object_iterator, 1);
|
||||
break;
|
||||
}
|
||||
|
||||
case value_t::array:
|
||||
{
|
||||
std::advance(m_it.array_iterator, 1);
|
||||
break;
|
||||
}
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
{
|
||||
++m_it.primitive_iterator;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief post-decrement (it--)
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl const operator--(int) // NOLINT(readability-const-return-type)
|
||||
{
|
||||
auto result = *this;
|
||||
--(*this);
|
||||
return result;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief pre-decrement (--it)
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl& operator--()
|
||||
{
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
{
|
||||
std::advance(m_it.object_iterator, -1);
|
||||
break;
|
||||
}
|
||||
|
||||
case value_t::array:
|
||||
{
|
||||
std::advance(m_it.array_iterator, -1);
|
||||
break;
|
||||
}
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
{
|
||||
--m_it.primitive_iterator;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: equal
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
template < typename IterImpl, detail::enable_if_t < (std::is_same<IterImpl, iter_impl>::value || std::is_same<IterImpl, other_iter_impl>::value), std::nullptr_t > = nullptr >
|
||||
bool operator==(const IterImpl& other) const
|
||||
{
|
||||
// if objects are not the same, the comparison is undefined
|
||||
if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
|
||||
{
|
||||
JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers", *m_object));
|
||||
}
|
||||
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
return (m_it.object_iterator == other.m_it.object_iterator);
|
||||
|
||||
case value_t::array:
|
||||
return (m_it.array_iterator == other.m_it.array_iterator);
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
return (m_it.primitive_iterator == other.m_it.primitive_iterator);
|
||||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: not equal
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
template < typename IterImpl, detail::enable_if_t < (std::is_same<IterImpl, iter_impl>::value || std::is_same<IterImpl, other_iter_impl>::value), std::nullptr_t > = nullptr >
|
||||
bool operator!=(const IterImpl& other) const
|
||||
{
|
||||
return !operator==(other);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: smaller
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
bool operator<(const iter_impl& other) const
|
||||
{
|
||||
// if objects are not the same, the comparison is undefined
|
||||
if (JSON_HEDLEY_UNLIKELY(m_object != other.m_object))
|
||||
{
|
||||
JSON_THROW(invalid_iterator::create(212, "cannot compare iterators of different containers", *m_object));
|
||||
}
|
||||
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
JSON_THROW(invalid_iterator::create(213, "cannot compare order of object iterators", *m_object));
|
||||
|
||||
case value_t::array:
|
||||
return (m_it.array_iterator < other.m_it.array_iterator);
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
return (m_it.primitive_iterator < other.m_it.primitive_iterator);
|
||||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: less than or equal
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
bool operator<=(const iter_impl& other) const
|
||||
{
|
||||
return !other.operator < (*this);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: greater than
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
bool operator>(const iter_impl& other) const
|
||||
{
|
||||
return !operator<=(other);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief comparison: greater than or equal
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
bool operator>=(const iter_impl& other) const
|
||||
{
|
||||
return !operator<(other);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief add to iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl& operator+=(difference_type i)
|
||||
{
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
JSON_THROW(invalid_iterator::create(209, "cannot use offsets with object iterators", *m_object));
|
||||
|
||||
case value_t::array:
|
||||
{
|
||||
std::advance(m_it.array_iterator, i);
|
||||
break;
|
||||
}
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
{
|
||||
m_it.primitive_iterator += i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief subtract from iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl& operator-=(difference_type i)
|
||||
{
|
||||
return operator+=(-i);
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief add to iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl operator+(difference_type i) const
|
||||
{
|
||||
auto result = *this;
|
||||
result += i;
|
||||
return result;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief addition of distance and iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
friend iter_impl operator+(difference_type i, const iter_impl& it)
|
||||
{
|
||||
auto result = it;
|
||||
result += i;
|
||||
return result;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief subtract from iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
iter_impl operator-(difference_type i) const
|
||||
{
|
||||
auto result = *this;
|
||||
result -= i;
|
||||
return result;
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief return difference
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
difference_type operator-(const iter_impl& other) const
|
||||
{
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
JSON_THROW(invalid_iterator::create(209, "cannot use offsets with object iterators", *m_object));
|
||||
|
||||
case value_t::array:
|
||||
return m_it.array_iterator - other.m_it.array_iterator;
|
||||
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
return m_it.primitive_iterator - other.m_it.primitive_iterator;
|
||||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief access to successor
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
reference operator[](difference_type n) const
|
||||
{
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
switch (m_object->m_type)
|
||||
{
|
||||
case value_t::object:
|
||||
JSON_THROW(invalid_iterator::create(208, "cannot use operator[] for object iterators", *m_object));
|
||||
|
||||
case value_t::array:
|
||||
return *std::next(m_it.array_iterator, n);
|
||||
|
||||
case value_t::null:
|
||||
JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
|
||||
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
{
|
||||
if (JSON_HEDLEY_LIKELY(m_it.primitive_iterator.get_value() == -n))
|
||||
{
|
||||
return *m_object;
|
||||
}
|
||||
|
||||
JSON_THROW(invalid_iterator::create(214, "cannot get value", *m_object));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief return the key of an object iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
const typename object_t::key_type& key() const
|
||||
{
|
||||
JSON_ASSERT(m_object != nullptr);
|
||||
|
||||
if (JSON_HEDLEY_LIKELY(m_object->is_object()))
|
||||
{
|
||||
return m_it.object_iterator->first;
|
||||
}
|
||||
|
||||
JSON_THROW(invalid_iterator::create(207, "cannot use key() for non-object iterators", *m_object));
|
||||
}
|
||||
|
||||
/*!
|
||||
@brief return the value of an iterator
|
||||
@pre The iterator is initialized; i.e. `m_object != nullptr`.
|
||||
*/
|
||||
reference value() const
|
||||
{
|
||||
return operator*();
|
||||
}
|
||||
|
||||
JSON_PRIVATE_UNLESS_TESTED:
|
||||
/// associated JSON instance
|
||||
pointer m_object = nullptr;
|
||||
/// the actual iterator of the associated instance
|
||||
internal_iterator<typename std::remove_const<BasicJsonType>::type> m_it {};
|
||||
};
|
||||
} // namespace detail
|
||||
} // namespace nlohmann
|
||||
189
libi2pd_webconsole/nlohmann/detail/iterators/iteration_proxy.hpp
Normal file
189
libi2pd_webconsole/nlohmann/detail/iterators/iteration_proxy.hpp
Normal file
|
|
@ -0,0 +1,189 @@
|
|||
#pragma once
|
||||
|
||||
#include <cstddef> // size_t
|
||||
#include <iterator> // input_iterator_tag
|
||||
#include <string> // string, to_string
|
||||
#include <tuple> // tuple_size, get, tuple_element
|
||||
#include <utility> // move
|
||||
|
||||
#include <nlohmann/detail/meta/type_traits.hpp>
|
||||
#include <nlohmann/detail/value_t.hpp>
|
||||
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
template<typename string_type>
|
||||
void int_to_string( string_type& target, std::size_t value )
|
||||
{
|
||||
// For ADL
|
||||
using std::to_string;
|
||||
target = to_string(value);
|
||||
}
|
||||
template<typename IteratorType> class iteration_proxy_value
|
||||
{
|
||||
public:
|
||||
using difference_type = std::ptrdiff_t;
|
||||
using value_type = iteration_proxy_value;
|
||||
using pointer = value_type * ;
|
||||
using reference = value_type & ;
|
||||
using iterator_category = std::input_iterator_tag;
|
||||
using string_type = typename std::remove_cv< typename std::remove_reference<decltype( std::declval<IteratorType>().key() ) >::type >::type;
|
||||
|
||||
private:
|
||||
/// the iterator
|
||||
IteratorType anchor;
|
||||
/// an index for arrays (used to create key names)
|
||||
std::size_t array_index = 0;
|
||||
/// last stringified array index
|
||||
mutable std::size_t array_index_last = 0;
|
||||
/// a string representation of the array index
|
||||
mutable string_type array_index_str = "0";
|
||||
/// an empty string (to return a reference for primitive values)
|
||||
const string_type empty_str{};
|
||||
|
||||
public:
|
||||
explicit iteration_proxy_value(IteratorType it) noexcept
|
||||
: anchor(std::move(it))
|
||||
{}
|
||||
|
||||
/// dereference operator (needed for range-based for)
|
||||
iteration_proxy_value& operator*()
|
||||
{
|
||||
return *this;
|
||||
}
|
||||
|
||||
/// increment operator (needed for range-based for)
|
||||
iteration_proxy_value& operator++()
|
||||
{
|
||||
++anchor;
|
||||
++array_index;
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
/// equality operator (needed for InputIterator)
|
||||
bool operator==(const iteration_proxy_value& o) const
|
||||
{
|
||||
return anchor == o.anchor;
|
||||
}
|
||||
|
||||
/// inequality operator (needed for range-based for)
|
||||
bool operator!=(const iteration_proxy_value& o) const
|
||||
{
|
||||
return anchor != o.anchor;
|
||||
}
|
||||
|
||||
/// return key of the iterator
|
||||
const string_type& key() const
|
||||
{
|
||||
JSON_ASSERT(anchor.m_object != nullptr);
|
||||
|
||||
switch (anchor.m_object->type())
|
||||
{
|
||||
// use integer array index as key
|
||||
case value_t::array:
|
||||
{
|
||||
if (array_index != array_index_last)
|
||||
{
|
||||
int_to_string( array_index_str, array_index );
|
||||
array_index_last = array_index;
|
||||
}
|
||||
return array_index_str;
|
||||
}
|
||||
|
||||
// use key from the object
|
||||
case value_t::object:
|
||||
return anchor.key();
|
||||
|
||||
// use an empty key for all primitive types
|
||||
case value_t::null:
|
||||
case value_t::string:
|
||||
case value_t::boolean:
|
||||
case value_t::number_integer:
|
||||
case value_t::number_unsigned:
|
||||
case value_t::number_float:
|
||||
case value_t::binary:
|
||||
case value_t::discarded:
|
||||
default:
|
||||
return empty_str;
|
||||
}
|
||||
}
|
||||
|
||||
/// return value of the iterator
|
||||
typename IteratorType::reference value() const
|
||||
{
|
||||
return anchor.value();
|
||||
}
|
||||
};
|
||||
|
||||
/// proxy class for the items() function
|
||||
template<typename IteratorType> class iteration_proxy
|
||||
{
|
||||
private:
|
||||
/// the container to iterate
|
||||
typename IteratorType::reference container;
|
||||
|
||||
public:
|
||||
/// construct iteration proxy from a container
|
||||
explicit iteration_proxy(typename IteratorType::reference cont) noexcept
|
||||
: container(cont) {}
|
||||
|
||||
/// return iterator begin (needed for range-based for)
|
||||
iteration_proxy_value<IteratorType> begin() noexcept
|
||||
{
|
||||
return iteration_proxy_value<IteratorType>(container.begin());
|
||||
}
|
||||
|
||||
/// return iterator end (needed for range-based for)
|
||||
iteration_proxy_value<IteratorType> end() noexcept
|
||||
{
|
||||
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
|
||||
{
|
||||
#if defined(__clang__)
|
||||
// Fix: https://github.com/nlohmann/json/issues/1401
|
||||
#pragma clang diagnostic push
|
||||
#pragma clang diagnostic ignored "-Wmismatched-tags"
|
||||
#endif
|
||||
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 >> ()));
|
||||
};
|
||||
#if defined(__clang__)
|
||||
#pragma clang diagnostic pop
|
||||
#endif
|
||||
} // namespace std
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
#pragma once
|
||||
|
||||
#include <iterator> // random_access_iterator_tag
|
||||
|
||||
#include <nlohmann/detail/meta/void_t.hpp>
|
||||
#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&;
|
||||
};
|
||||
} // namespace detail
|
||||
} // namespace nlohmann
|
||||
|
|
@ -0,0 +1,119 @@
|
|||
#pragma once
|
||||
|
||||
#include <cstddef> // ptrdiff_t
|
||||
#include <iterator> // reverse_iterator
|
||||
#include <utility> // declval
|
||||
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
//////////////////////
|
||||
// reverse_iterator //
|
||||
//////////////////////
|
||||
|
||||
/*!
|
||||
@brief a template for a reverse iterator class
|
||||
|
||||
@tparam Base the base iterator type to reverse. Valid types are @ref
|
||||
iterator (to create @ref reverse_iterator) and @ref const_iterator (to
|
||||
create @ref const_reverse_iterator).
|
||||
|
||||
@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).
|
||||
- [OutputIterator](https://en.cppreference.com/w/cpp/named_req/OutputIterator):
|
||||
It is possible to write to the pointed-to element (only if @a Base is
|
||||
@ref iterator).
|
||||
|
||||
@since version 1.0.0
|
||||
*/
|
||||
template<typename Base>
|
||||
class json_reverse_iterator : public std::reverse_iterator<Base>
|
||||
{
|
||||
public:
|
||||
using difference_type = std::ptrdiff_t;
|
||||
/// shortcut to the reverse iterator adapter
|
||||
using base_iterator = std::reverse_iterator<Base>;
|
||||
/// the reference type for the pointed-to element
|
||||
using reference = typename Base::reference;
|
||||
|
||||
/// create reverse iterator from iterator
|
||||
explicit json_reverse_iterator(const typename base_iterator::iterator_type& it) noexcept
|
||||
: base_iterator(it) {}
|
||||
|
||||
/// create reverse iterator from base class
|
||||
explicit json_reverse_iterator(const base_iterator& it) noexcept : base_iterator(it) {}
|
||||
|
||||
/// post-increment (it++)
|
||||
json_reverse_iterator const operator++(int) // NOLINT(readability-const-return-type)
|
||||
{
|
||||
return static_cast<json_reverse_iterator>(base_iterator::operator++(1));
|
||||
}
|
||||
|
||||
/// pre-increment (++it)
|
||||
json_reverse_iterator& operator++()
|
||||
{
|
||||
return static_cast<json_reverse_iterator&>(base_iterator::operator++());
|
||||
}
|
||||
|
||||
/// post-decrement (it--)
|
||||
json_reverse_iterator const operator--(int) // NOLINT(readability-const-return-type)
|
||||
{
|
||||
return static_cast<json_reverse_iterator>(base_iterator::operator--(1));
|
||||
}
|
||||
|
||||
/// pre-decrement (--it)
|
||||
json_reverse_iterator& operator--()
|
||||
{
|
||||
return static_cast<json_reverse_iterator&>(base_iterator::operator--());
|
||||
}
|
||||
|
||||
/// add to iterator
|
||||
json_reverse_iterator& operator+=(difference_type i)
|
||||
{
|
||||
return static_cast<json_reverse_iterator&>(base_iterator::operator+=(i));
|
||||
}
|
||||
|
||||
/// add to iterator
|
||||
json_reverse_iterator operator+(difference_type i) const
|
||||
{
|
||||
return static_cast<json_reverse_iterator>(base_iterator::operator+(i));
|
||||
}
|
||||
|
||||
/// subtract from iterator
|
||||
json_reverse_iterator operator-(difference_type i) const
|
||||
{
|
||||
return static_cast<json_reverse_iterator>(base_iterator::operator-(i));
|
||||
}
|
||||
|
||||
/// return difference
|
||||
difference_type operator-(const json_reverse_iterator& other) const
|
||||
{
|
||||
return base_iterator(*this) - base_iterator(other);
|
||||
}
|
||||
|
||||
/// access to successor
|
||||
reference operator[](difference_type n) const
|
||||
{
|
||||
return *(this->operator+(n));
|
||||
}
|
||||
|
||||
/// return the key of an object iterator
|
||||
auto key() const -> decltype(std::declval<Base>().key())
|
||||
{
|
||||
auto it = --this->base();
|
||||
return it.key();
|
||||
}
|
||||
|
||||
/// return the value of an iterator
|
||||
reference value() const
|
||||
{
|
||||
auto it = --this->base();
|
||||
return it.operator * ();
|
||||
}
|
||||
};
|
||||
} // namespace detail
|
||||
} // namespace nlohmann
|
||||
|
|
@ -0,0 +1,123 @@
|
|||
#pragma once
|
||||
|
||||
#include <cstddef> // ptrdiff_t
|
||||
#include <limits> // numeric_limits
|
||||
|
||||
#include <nlohmann/detail/macro_scope.hpp>
|
||||
|
||||
namespace nlohmann
|
||||
{
|
||||
namespace detail
|
||||
{
|
||||
/*
|
||||
@brief an iterator for primitive JSON types
|
||||
|
||||
This class models an iterator for primitive JSON types (boolean, number,
|
||||
string). It's only purpose is to allow the iterator/const_iterator classes
|
||||
to "iterate" over primitive values. Internally, the iterator is modeled by
|
||||
a `difference_type` variable. Value begin_value (`0`) models the begin,
|
||||
end_value (`1`) models past the end.
|
||||
*/
|
||||
class primitive_iterator_t
|
||||
{
|
||||
private:
|
||||
using difference_type = std::ptrdiff_t;
|
||||
static constexpr difference_type begin_value = 0;
|
||||
static constexpr difference_type end_value = begin_value + 1;
|
||||
|
||||
JSON_PRIVATE_UNLESS_TESTED:
|
||||
/// iterator as signed integer type
|
||||
difference_type m_it = (std::numeric_limits<std::ptrdiff_t>::min)();
|
||||
|
||||
public:
|
||||
constexpr difference_type get_value() const noexcept
|
||||
{
|
||||
return m_it;
|
||||
}
|
||||
|
||||
/// set iterator to a defined beginning
|
||||
void set_begin() noexcept
|
||||
{
|
||||
m_it = begin_value;
|
||||
}
|
||||
|
||||
/// set iterator to a defined past the end
|
||||
void set_end() noexcept
|
||||
{
|
||||
m_it = end_value;
|
||||
}
|
||||
|
||||
/// return whether the iterator can be dereferenced
|
||||
constexpr bool is_begin() const noexcept
|
||||
{
|
||||
return m_it == begin_value;
|
||||
}
|
||||
|
||||
/// return whether the iterator is at end
|
||||
constexpr bool is_end() const noexcept
|
||||
{
|
||||
return m_it == end_value;
|
||||
}
|
||||
|
||||
friend constexpr bool operator==(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
|
||||
{
|
||||
return lhs.m_it == rhs.m_it;
|
||||
}
|
||||
|
||||
friend constexpr bool operator<(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
|
||||
{
|
||||
return lhs.m_it < rhs.m_it;
|
||||
}
|
||||
|
||||
primitive_iterator_t operator+(difference_type n) noexcept
|
||||
{
|
||||
auto result = *this;
|
||||
result += n;
|
||||
return result;
|
||||
}
|
||||
|
||||
friend constexpr difference_type operator-(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
|
||||
{
|
||||
return lhs.m_it - rhs.m_it;
|
||||
}
|
||||
|
||||
primitive_iterator_t& operator++() noexcept
|
||||
{
|
||||
++m_it;
|
||||
return *this;
|
||||
}
|
||||
|
||||
primitive_iterator_t const operator++(int) noexcept // NOLINT(readability-const-return-type)
|
||||
{
|
||||
auto result = *this;
|
||||
++m_it;
|
||||
return result;
|
||||
}
|
||||
|
||||
primitive_iterator_t& operator--() noexcept
|
||||
{
|
||||
--m_it;
|
||||
return *this;
|
||||
}
|
||||
|
||||
primitive_iterator_t const operator--(int) noexcept // NOLINT(readability-const-return-type)
|
||||
{
|
||||
auto result = *this;
|
||||
--m_it;
|
||||
return result;
|
||||
}
|
||||
|
||||
primitive_iterator_t& operator+=(difference_type n) noexcept
|
||||
{
|
||||
m_it += n;
|
||||
return *this;
|
||||
}
|
||||
|
||||
primitive_iterator_t& operator-=(difference_type n) noexcept
|
||||
{
|
||||
m_it -= n;
|
||||
return *this;
|
||||
}
|
||||
};
|
||||
} // namespace detail
|
||||
} // namespace nlohmann
|
||||
Loading…
Add table
Add a link
Reference in a new issue