replace constructor by from/to_json: string_t
This commit is contained in:
Théo DELRIEU
parent
6b89785fba
commit
bbe40641a3
2 changed files with 100 additions and 184 deletions
142
src/json.hpp
142
src/json.hpp
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@ -217,6 +217,18 @@ struct external_constructor<value_t::boolean>
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j.assert_invariant();
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}
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};
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template <>
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struct external_constructor<value_t::string>
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{
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template <typename Json>
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static void construct(Json &j, const typename Json::string_t& s)
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{
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j.m_type = value_t::string;
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j.m_value = s;
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j.assert_invariant();
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}
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};
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// very useful construct against boilerplate (more boilerplate needed than in
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// C++17: http://en.cppreference.com/w/cpp/types/void_t)
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template <typename...> struct make_void
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@ -328,12 +340,14 @@ struct is_compatible_array_type
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{
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// the check for CompatibleArrayType = void is done in
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// `is_compatible_object_type`, but we need the conjunction here as well
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static auto constexpr value = is_compatible_array_type_impl <
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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has_value_type<CompatibleArrayType>,
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has_iterator<CompatibleArrayType>>::value,
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BasicJson, CompatibleArrayType >::value;
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static auto constexpr value = is_compatible_array_type_impl<
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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negation<std::is_constructible<typename BasicJson::string_t,
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CompatibleArrayType>>,
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has_value_type<CompatibleArrayType>,
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has_iterator<CompatibleArrayType>>::value,
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BasicJson, CompatibleArrayType>::value;
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};
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template <bool, typename, typename>
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@ -376,7 +390,6 @@ struct is_compatible_basic_json_type
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static auto constexpr value =
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is_unscoped_enum<T>::value or
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std::is_same<T, BasicJson>::value or
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std::is_constructible<typename BasicJson::string_t, T>::value or
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is_compatible_array_type<BasicJson, T>::value or
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is_compatible_object_type<typename BasicJson::object_t, T>::value or
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is_compatible_float_type<typename BasicJson::number_float_t, T>::value or
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@ -457,6 +470,15 @@ void to_json(Json &j, typename Json::boolean_t b) noexcept
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external_constructor<value_t::boolean>::construct(j, b);
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}
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template <typename Json, typename CompatibleString,
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enable_if_t<std::is_constructible<typename Json::string_t,
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CompatibleString>::value,
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int> = 0>
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void to_json(Json &j, const CompatibleString &s)
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{
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external_constructor<value_t::string>::construct(j, s);
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::boolean_t& b)
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{
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@ -465,6 +487,14 @@ void from_json(Json const& j, typename Json::boolean_t& b)
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b = *const_cast<Json&>(j).template get_ptr<typename Json::boolean_t*>();
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::string_t& s)
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{
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if (!j.is_string())
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throw std::domain_error("type must be string, but is " + type_name(j));
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s = *const_cast<Json&>(j).template get_ptr<typename Json::string_t*>();
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}
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struct to_json_fn
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{
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// is it really useful to mark those as constexpr?
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@ -1680,90 +1710,6 @@ class basic_json
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JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
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}
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/*!
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@brief create a string (explicit)
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Create an string JSON value with a given content.
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@param[in] val a value for the string
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the constructor with an @ref
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string_t parameter.,basic_json__string_t}
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@sa @ref basic_json(const typename string_t::value_type*) -- create a
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string value from a character pointer
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@sa @ref basic_json(const CompatibleStringType&) -- create a string value
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from a compatible string container
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@since version 1.0.0
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*/
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basic_json(const string_t& val)
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: m_type(value_t::string), m_value(val)
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{
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assert_invariant();
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}
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/*!
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@brief create a string (explicit)
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Create a string JSON value with a given content.
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@param[in] val a literal value for the string
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the constructor with string literal
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parameter.,basic_json__string_t_value_type}
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@sa @ref basic_json(const string_t&) -- create a string value
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@sa @ref basic_json(const CompatibleStringType&) -- create a string value
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from a compatible string container
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@since version 1.0.0
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*/
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basic_json(const typename string_t::value_type* val)
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: basic_json(string_t(val))
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{
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assert_invariant();
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}
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/*!
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@brief create a string (implicit)
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Create a string JSON value with a given content.
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@param[in] val a value for the string
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@tparam CompatibleStringType an string type which is compatible to @ref
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string_t, for instance `std::string`.
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the construction of a string value
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from a compatible type.,basic_json__CompatibleStringType}
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@sa @ref basic_json(const string_t&) -- create a string value
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@sa @ref basic_json(const typename string_t::value_type*) -- create a
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string value from a character pointer
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@since version 1.0.0
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*/
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template<class CompatibleStringType, typename std::enable_if<
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std::is_constructible<string_t, CompatibleStringType>::value, int>::type = 0>
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basic_json(const CompatibleStringType& val)
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: basic_json(string_t(val))
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{
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assert_invariant();
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}
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/*!
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@brief create an integer number (explicit)
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@ -11505,9 +11451,21 @@ basic_json_parser_66:
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}
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private:
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friend bool operator==(json_pointer const &lhs,
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json_pointer const &rhs) noexcept
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{
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return lhs.reference_tokens == rhs.reference_tokens;
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}
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friend bool operator!=(json_pointer const &lhs,
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json_pointer const &rhs) noexcept
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{
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return !(lhs == rhs);
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}
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/// the reference tokens
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std::vector<std::string> reference_tokens {};
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};
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};
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//////////////////////////
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// JSON Pointer support //
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@ -217,6 +217,18 @@ struct external_constructor<value_t::boolean>
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j.assert_invariant();
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}
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};
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template <>
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struct external_constructor<value_t::string>
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{
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template <typename Json>
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static void construct(Json &j, const typename Json::string_t& s)
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{
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j.m_type = value_t::string;
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j.m_value = s;
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j.assert_invariant();
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}
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};
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// very useful construct against boilerplate (more boilerplate needed than in
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// C++17: http://en.cppreference.com/w/cpp/types/void_t)
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template <typename...> struct make_void
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@ -328,12 +340,14 @@ struct is_compatible_array_type
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{
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// the check for CompatibleArrayType = void is done in
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// `is_compatible_object_type`, but we need the conjunction here as well
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static auto constexpr value = is_compatible_array_type_impl <
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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has_value_type<CompatibleArrayType>,
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has_iterator<CompatibleArrayType>>::value,
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BasicJson, CompatibleArrayType >::value;
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static auto constexpr value = is_compatible_array_type_impl<
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conjunction<negation<is_compatible_object_type<
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typename BasicJson::object_t, CompatibleArrayType>>,
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negation<std::is_constructible<typename BasicJson::string_t,
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CompatibleArrayType>>,
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has_value_type<CompatibleArrayType>,
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has_iterator<CompatibleArrayType>>::value,
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BasicJson, CompatibleArrayType>::value;
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};
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template <bool, typename, typename>
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@ -376,7 +390,6 @@ struct is_compatible_basic_json_type
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static auto constexpr value =
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is_unscoped_enum<T>::value or
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std::is_same<T, BasicJson>::value or
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std::is_constructible<typename BasicJson::string_t, T>::value or
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is_compatible_array_type<BasicJson, T>::value or
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is_compatible_object_type<typename BasicJson::object_t, T>::value or
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is_compatible_float_type<typename BasicJson::number_float_t, T>::value or
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@ -457,6 +470,15 @@ void to_json(Json &j, typename Json::boolean_t b) noexcept
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external_constructor<value_t::boolean>::construct(j, b);
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}
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template <typename Json, typename CompatibleString,
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enable_if_t<std::is_constructible<typename Json::string_t,
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CompatibleString>::value,
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int> = 0>
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void to_json(Json &j, const CompatibleString &s)
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{
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external_constructor<value_t::string>::construct(j, s);
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::boolean_t& b)
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{
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@ -465,6 +487,14 @@ void from_json(Json const& j, typename Json::boolean_t& b)
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b = *const_cast<Json&>(j).template get_ptr<typename Json::boolean_t*>();
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::string_t& s)
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{
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if (!j.is_string())
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throw std::domain_error("type must be string, but is " + type_name(j));
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s = *const_cast<Json&>(j).template get_ptr<typename Json::string_t*>();
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}
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struct to_json_fn
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{
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// is it really useful to mark those as constexpr?
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@ -1681,90 +1711,6 @@ class basic_json
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JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
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}
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/*!
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@brief create a string (explicit)
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Create an string JSON value with a given content.
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@param[in] val a value for the string
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the constructor with an @ref
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string_t parameter.,basic_json__string_t}
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@sa @ref basic_json(const typename string_t::value_type*) -- create a
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string value from a character pointer
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@sa @ref basic_json(const CompatibleStringType&) -- create a string value
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from a compatible string container
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@since version 1.0.0
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*/
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basic_json(const string_t& val)
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: m_type(value_t::string), m_value(val)
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{
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assert_invariant();
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}
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/*!
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@brief create a string (explicit)
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Create a string JSON value with a given content.
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@param[in] val a literal value for the string
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the constructor with string literal
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parameter.,basic_json__string_t_value_type}
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@sa @ref basic_json(const string_t&) -- create a string value
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@sa @ref basic_json(const CompatibleStringType&) -- create a string value
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from a compatible string container
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@since version 1.0.0
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*/
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basic_json(const typename string_t::value_type* val)
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: basic_json(string_t(val))
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{
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assert_invariant();
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}
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/*!
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@brief create a string (implicit)
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Create a string JSON value with a given content.
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@param[in] val a value for the string
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@tparam CompatibleStringType an string type which is compatible to @ref
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string_t, for instance `std::string`.
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@complexity Linear in the size of the passed @a val.
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@throw std::bad_alloc if allocation for string value fails
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@liveexample{The following code shows the construction of a string value
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from a compatible type.,basic_json__CompatibleStringType}
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@sa @ref basic_json(const string_t&) -- create a string value
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@sa @ref basic_json(const typename string_t::value_type*) -- create a
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string value from a character pointer
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@since version 1.0.0
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*/
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template<class CompatibleStringType, typename std::enable_if<
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std::is_constructible<string_t, CompatibleStringType>::value, int>::type = 0>
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basic_json(const CompatibleStringType& val)
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: basic_json(string_t(val))
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{
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assert_invariant();
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}
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/*!
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@brief create an integer number (explicit)
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@ -11131,9 +11077,21 @@ class basic_json
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}
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private:
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friend bool operator==(json_pointer const &lhs,
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json_pointer const &rhs) noexcept
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{
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return lhs.reference_tokens == rhs.reference_tokens;
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}
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friend bool operator!=(json_pointer const &lhs,
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json_pointer const &rhs) noexcept
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{
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return !(lhs == rhs);
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}
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/// the reference tokens
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std::vector<std::string> reference_tokens {};
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};
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};
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//////////////////////////
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// JSON Pointer support //
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