j3d1/json
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

replace constructor by from/to_json: string_t

Browse source
This commit is contained in:
Théo DELRIEU 2017-01-07 18:09:42 +01:00
parent 6b89785fba
commit bbe40641a3
2 changed files with 100 additions and 184 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

142
src/json.hpp
View file

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

142
src/json.hpp.re2c
View file

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