mirror of https://github.com/nlohmann/json.git
replace constructor by from/to_json: number_integer_t
Théo DELRIEU
parent
a32de3b528
commit
f00898331e
129
src/json.hpp
129
src/json.hpp
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@ -260,6 +260,18 @@ struct external_constructor<value_t::number_unsigned>
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}
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};
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template <>
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struct external_constructor<value_t::number_integer>
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{
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template <typename Json>
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static void construct(Json &j, typename Json::number_integer_t val) noexcept
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{
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j.m_type = value_t::number_integer;
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j.m_value = val;
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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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@ -387,6 +399,7 @@ struct is_compatible_integer_type_impl : std::false_type {};
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template <typename RealIntegerType, typename CompatibleNumberIntegerType>
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struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIntegerType>
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{
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// is there an assert somewhere on overflows?
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using RealLimits = std::numeric_limits<RealIntegerType>;
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using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
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@ -402,7 +415,7 @@ struct is_compatible_integer_type
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{
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static constexpr auto
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value = is_compatible_integer_type_impl <
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std::is_arithmetic<CompatibleNumberIntegerType>::value and
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std::is_integral<CompatibleNumberIntegerType>::value and
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not std::is_same<bool, CompatibleNumberIntegerType>::value,
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RealIntegerType, CompatibleNumberIntegerType > ::value;
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};
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@ -422,8 +435,7 @@ struct is_compatible_basic_json_type
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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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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_integer_type<typename BasicJson::number_integer_t, T>::value;
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is_compatible_object_type<typename BasicJson::object_t, T>::value;
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};
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template <typename T, typename BasicJson, typename PrimitiveIterator>
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@ -547,6 +559,16 @@ void to_json(Json &j, CompatibleNumberUnsignedType val) noexcept
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external_constructor<value_t::number_unsigned>::construct(j, val);
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}
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template <
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typename Json, typename CompatibleNumberIntegerType,
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enable_if_t<is_compatible_integer_type<typename Json::number_integer_t,
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CompatibleNumberIntegerType>::value,
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int> = 0>
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void to_json(Json &j, CompatibleNumberIntegerType val) noexcept
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{
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external_constructor<value_t::number_integer>::construct(j, val);
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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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@ -575,6 +597,12 @@ void from_json(Json const& j, typename Json::number_unsigned_t& val)
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get_arithmetic_value(j, val);
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::number_integer_t& val)
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{
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get_arithmetic_value(j, val);
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}
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// overload for arithmetic types, not chosen for basic_json template arguments (BooleanType, etc..)
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//
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// note: Is it really necessary to provide explicit overloads for boolean_t etc..
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@ -1820,64 +1848,6 @@ 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 an integer number (explicit)
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Create an integer number JSON value with a given content.
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@tparam T A helper type to remove this function via SFINAE in case @ref
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number_integer_t is the same as `int`. In this case, this constructor
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would have the same signature as @ref basic_json(const int value). Note
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the helper type @a T is not visible in this constructor's interface.
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@param[in] val an integer to create a JSON number from
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@complexity Constant.
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@liveexample{The example below shows the construction of an integer
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number value.,basic_json__number_integer_t}
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@sa @ref basic_json(const int) -- create a number value (integer)
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@sa @ref basic_json(const CompatibleNumberIntegerType) -- create a number
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value (integer) from a compatible number type
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@since version 1.0.0
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*/
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template<typename T, typename std::enable_if<
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not (std::is_same<T, int>::value) and
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std::is_same<T, number_integer_t>::value, int>::type = 0>
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basic_json(const number_integer_t val) noexcept
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: m_type(value_t::number_integer), 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 an integer number from an enum type (explicit)
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Create an integer number JSON value with a given content.
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@param[in] val an integer to create a JSON number from
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@note This constructor allows to pass enums directly to a constructor. As
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C++ has no way of specifying the type of an anonymous enum explicitly, we
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can only rely on the fact that such values implicitly convert to int. As
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int may already be the same type of number_integer_t, we may need to
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switch off the constructor @ref basic_json(const number_integer_t).
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@complexity Constant.
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@liveexample{The example below shows the construction of an integer
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number value from an anonymous enum.,basic_json__const_int}
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@sa @ref basic_json(const number_integer_t) -- create a number value
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(integer)
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@sa @ref basic_json(const CompatibleNumberIntegerType) -- create a number
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value (integer) from a compatible number type
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@since version 1.0.0
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*/
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// Constructor for unscoped enums (not enum classes)
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template <typename T, enable_if_t<is_unscoped_enum<T>::value, int> = 0>
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basic_json(T val) noexcept
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@ -1887,43 +1857,6 @@ class basic_json
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assert_invariant();
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}
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/*!
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@brief create an integer number (implicit)
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Create an integer number JSON value with a given content. This constructor
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allows any type @a CompatibleNumberIntegerType that can be used to
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construct values of type @ref number_integer_t.
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@tparam CompatibleNumberIntegerType An integer type which is compatible to
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@ref number_integer_t. Examples include the types `int`, `int32_t`,
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`long`, and `short`.
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@param[in] val an integer to create a JSON number from
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@complexity Constant.
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@liveexample{The example below shows the construction of several integer
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number values from compatible
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types.,basic_json__CompatibleIntegerNumberType}
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@sa @ref basic_json(const number_integer_t) -- create a number value
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(integer)
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@sa @ref basic_json(const int) -- create a number value (integer)
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@since version 1.0.0
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*/
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template <
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typename CompatibleNumberIntegerType,
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enable_if_t<detail::is_compatible_integer_type<
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number_integer_t, CompatibleNumberIntegerType>::value,
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int> = 0 >
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basic_json(const CompatibleNumberIntegerType val) noexcept
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: m_type(value_t::number_integer),
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m_value(static_cast<number_integer_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 container (array or object) from an initializer list
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@ -260,6 +260,18 @@ struct external_constructor<value_t::number_unsigned>
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}
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};
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template <>
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struct external_constructor<value_t::number_integer>
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{
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template <typename Json>
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static void construct(Json &j, typename Json::number_integer_t val) noexcept
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{
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j.m_type = value_t::number_integer;
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j.m_value = val;
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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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@ -387,6 +399,7 @@ struct is_compatible_integer_type_impl : std::false_type {};
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template <typename RealIntegerType, typename CompatibleNumberIntegerType>
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struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIntegerType>
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{
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// is there an assert somewhere on overflows?
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using RealLimits = std::numeric_limits<RealIntegerType>;
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using CompatibleLimits = std::numeric_limits<CompatibleNumberIntegerType>;
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@ -402,7 +415,7 @@ struct is_compatible_integer_type
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{
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static constexpr auto
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value = is_compatible_integer_type_impl <
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std::is_arithmetic<CompatibleNumberIntegerType>::value and
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std::is_integral<CompatibleNumberIntegerType>::value and
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not std::is_same<bool, CompatibleNumberIntegerType>::value,
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RealIntegerType, CompatibleNumberIntegerType > ::value;
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};
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@ -422,8 +435,7 @@ struct is_compatible_basic_json_type
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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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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_integer_type<typename BasicJson::number_integer_t, T>::value;
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is_compatible_object_type<typename BasicJson::object_t, T>::value;
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};
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template <typename T, typename BasicJson, typename PrimitiveIterator>
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@ -547,6 +559,16 @@ void to_json(Json &j, CompatibleNumberUnsignedType val) noexcept
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external_constructor<value_t::number_unsigned>::construct(j, val);
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}
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template <
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typename Json, typename CompatibleNumberIntegerType,
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enable_if_t<is_compatible_integer_type<typename Json::number_integer_t,
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CompatibleNumberIntegerType>::value,
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int> = 0>
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void to_json(Json &j, CompatibleNumberIntegerType val) noexcept
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{
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external_constructor<value_t::number_integer>::construct(j, val);
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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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@ -575,6 +597,12 @@ void from_json(Json const& j, typename Json::number_unsigned_t& val)
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get_arithmetic_value(j, val);
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}
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template <typename Json>
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void from_json(Json const& j, typename Json::number_integer_t& val)
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{
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get_arithmetic_value(j, val);
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}
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// overload for arithmetic types, not chosen for basic_json template arguments (BooleanType, etc..)
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//
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// note: Is it really necessary to provide explicit overloads for boolean_t etc..
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@ -1821,64 +1849,6 @@ 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 an integer number (explicit)
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Create an integer number JSON value with a given content.
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@tparam T A helper type to remove this function via SFINAE in case @ref
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number_integer_t is the same as `int`. In this case, this constructor
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would have the same signature as @ref basic_json(const int value). Note
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the helper type @a T is not visible in this constructor's interface.
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@param[in] val an integer to create a JSON number from
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@complexity Constant.
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@liveexample{The example below shows the construction of an integer
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number value.,basic_json__number_integer_t}
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@sa @ref basic_json(const int) -- create a number value (integer)
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@sa @ref basic_json(const CompatibleNumberIntegerType) -- create a number
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value (integer) from a compatible number type
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@since version 1.0.0
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*/
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template<typename T, typename std::enable_if<
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not (std::is_same<T, int>::value) and
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std::is_same<T, number_integer_t>::value, int>::type = 0>
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basic_json(const number_integer_t val) noexcept
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: m_type(value_t::number_integer), 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 an integer number from an enum type (explicit)
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Create an integer number JSON value with a given content.
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@param[in] val an integer to create a JSON number from
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@note This constructor allows to pass enums directly to a constructor. As
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C++ has no way of specifying the type of an anonymous enum explicitly, we
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can only rely on the fact that such values implicitly convert to int. As
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int may already be the same type of number_integer_t, we may need to
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switch off the constructor @ref basic_json(const number_integer_t).
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@complexity Constant.
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@liveexample{The example below shows the construction of an integer
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number value from an anonymous enum.,basic_json__const_int}
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@sa @ref basic_json(const number_integer_t) -- create a number value
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(integer)
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@sa @ref basic_json(const CompatibleNumberIntegerType) -- create a number
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value (integer) from a compatible number type
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@since version 1.0.0
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*/
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// Constructor for unscoped enums (not enum classes)
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template <typename T, enable_if_t<is_unscoped_enum<T>::value, int> = 0>
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basic_json(T val) noexcept
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@ -1888,43 +1858,6 @@ class basic_json
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assert_invariant();
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}
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/*!
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@brief create an integer number (implicit)
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Create an integer number JSON value with a given content. This constructor
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allows any type @a CompatibleNumberIntegerType that can be used to
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construct values of type @ref number_integer_t.
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@tparam CompatibleNumberIntegerType An integer type which is compatible to
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@ref number_integer_t. Examples include the types `int`, `int32_t`,
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`long`, and `short`.
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@param[in] val an integer to create a JSON number from
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@complexity Constant.
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@liveexample{The example below shows the construction of several integer
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number values from compatible
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types.,basic_json__CompatibleIntegerNumberType}
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@sa @ref basic_json(const number_integer_t) -- create a number value
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(integer)
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@sa @ref basic_json(const int) -- create a number value (integer)
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@since version 1.0.0
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*/
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template <
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typename CompatibleNumberIntegerType,
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enable_if_t<detail::is_compatible_integer_type<
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number_integer_t, CompatibleNumberIntegerType>::value,
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int> = 0 >
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basic_json(const CompatibleNumberIntegerType val) noexcept
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: m_type(value_t::number_integer),
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m_value(static_cast<number_integer_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 container (array or object) from an initializer list
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