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rewrite unit-udt: basic usage

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Théo Delrieu 2016-11-30 23:16:54 +01:00 committed by Théo DELRIEU
parent 60e6f822fa
commit c0c72b5b62
4 changed files with 290 additions and 76 deletions
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138
src/json.hpp
View file

@ -257,6 +257,30 @@ struct is_compatible_integer_type_impl<true, RealIntegerType, CompatibleNumberIn
RealLimits::is_signed == CompatibleLimits::is_signed;
};
// quickfix, just trying to make things compile before refactoring
template <bool B, typename RealIntegerType, typename CompatibleEnumType>
struct is_compatible_enum_type_impl : std::false_type{};
template <typename RealIntegerType, typename CompatibleEnumType>
struct is_compatible_enum_type_impl<true, RealIntegerType, CompatibleEnumType>
{
using RealLimits = std::numeric_limits<RealIntegerType>;
using CompatibleLimits = std::numeric_limits<typename std::underlying_type<CompatibleEnumType>::type>;
static constexpr auto value =
CompatibleLimits::is_integer and
RealLimits::is_signed == CompatibleLimits::is_signed;
};
template <typename RealIntegerType, typename CompatibleEnumType>
struct is_compatible_enum_type
{
static constexpr auto value = is_compatible_enum_type_impl<
// quickfix for all enums
std::is_enum<CompatibleEnumType>::value, RealIntegerType,
CompatibleEnumType>::value;
};
template <typename RealIntegerType, typename CompatibleNumberIntegerType>
struct is_compatible_integer_type
{
@ -281,6 +305,7 @@ struct is_compatible_basic_json_type
std::is_constructible<typename BasicJson::string_t, T>::value or
std::is_same<typename BasicJson::boolean_t, T>::value or
is_compatible_array_type<BasicJson, T>::value or
is_compatible_enum_type<T, typename BasicJson::number_integer_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_integer_type<typename BasicJson::number_integer_t,
@ -289,6 +314,16 @@ struct is_compatible_basic_json_type
T>::value;
};
template <typename T, typename BasicJson, typename PrimitiveIterator>
struct is_basic_json_nested_class
{
static auto constexpr value = std::is_same<T, typename BasicJson::iterator>::value or
std::is_same<T, typename BasicJson::const_iterator>::value or
std::is_same<T, typename BasicJson::reverse_iterator>::value or
std::is_same<T, typename BasicJson::const_reverse_iterator>::value or
std::is_same<T, PrimitiveIterator>::value or
std::is_same<T, typename BasicJson::json_pointer>::value;
};
// This trait checks if JSONSerializer<T>::from_json(json const&, udt&) exists
template <template <typename, typename> class JSONSerializer, typename Json,
@ -344,8 +379,8 @@ public:
// those declarations are needed to workaround a MSVC bug related to ADL
// (taken from MSVC-Ranges implementation)
//void to_json();
//void from_json();
void to_json();
void from_json();
struct to_json_fn
{
@ -524,6 +559,7 @@ class basic_json
using basic_json_t = basic_json<ObjectType, ArrayType, StringType,
BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType,
AllocatorType, JSONSerializer>;
class primitive_iterator_t;
public:
// forward declarations
@ -1589,10 +1625,15 @@ class basic_json
enable_if_t<not std::is_base_of<std::istream, uncvref_t<T>>::value and
not detail::is_compatible_basic_json_type<
uncvref_t<T>, basic_json_t>::value and
not detail::is_basic_json_nested_class<uncvref_t<T>, basic_json_t, primitive_iterator_t>::value and
not std::is_same<uncvref_t<T>, typename basic_json_t::array_t::iterator>::value and
// quickfix
not std::is_enum<uncvref_t<T>>::value and
not std::is_same<uncvref_t<T>, typename basic_json_t::object_t::iterator>::value and
detail::has_to_json<JSONSerializer, basic_json,
uncvref_t<T>>::value,
int> = 0>
explicit basic_json(T &&val)
basic_json(T &&val)
{
JSONSerializer<uncvref_t<T>>::to_json(*this, std::forward<T>(val));
}
@ -1793,7 +1834,8 @@ class basic_json
template <
typename CompatibleNumberIntegerType,
enable_if_t<detail::is_compatible_integer_type<
number_integer_t, CompatibleNumberIntegerType>::value,
number_integer_t, CompatibleNumberIntegerType>::value or
detail::is_compatible_enum_type<number_integer_t, CompatibleNumberIntegerType>::value,
int> = 0>
basic_json(const CompatibleNumberIntegerType val) noexcept
: m_type(value_t::number_integer),
@ -8502,6 +8544,11 @@ class basic_json
class primitive_iterator_t
{
public:
difference_type get_value() const noexcept
{
return m_it;
}
/// set iterator to a defined beginning
void set_begin() noexcept
{
@ -8526,16 +8573,85 @@ class basic_json
return (m_it == end_value);
}
/// return reference to the value to change and compare
operator difference_type& () noexcept
friend constexpr bool operator==(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
{
return m_it;
return lhs.m_it == rhs.m_it;
}
/// return value to compare
constexpr operator difference_type () const noexcept
friend constexpr bool operator!=(primitive_iterator_t lhs, primitive_iterator_t rhs) noexcept
{
return m_it;
return !(lhs == rhs);
}
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;
}
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;
}
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;
}
friend std::ostream& operator<<(std::ostream& os, primitive_iterator_t it)
{
return os << it.m_it;
}
primitive_iterator_t& operator++()
{
++m_it;
return *this;
}
primitive_iterator_t& operator++(int)
{
m_it++;
return *this;
}
primitive_iterator_t& operator--()
{
--m_it;
return *this;
}
primitive_iterator_t& operator--(int)
{
m_it--;
return *this;
}
primitive_iterator_t& operator+=(difference_type n)
{
m_it += n;
return *this;
}
primitive_iterator_t& operator-=(difference_type n)
{
m_it -= n;
return *this;
}
private:
@ -9240,7 +9356,7 @@ class basic_json
default:
{
if (m_it.primitive_iterator == -n)
if (m_it.primitive_iterator.get_value() == -n)
{
return *m_object;
}

36
test/src/unit-class_const_iterator.cpp
View file

@ -220,20 +220,20 @@ TEST_CASE("const_iterator class")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it++;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
it++;
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it++;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -271,20 +271,20 @@ TEST_CASE("const_iterator class")
{
json j(json::value_t::null);
json::const_iterator it = j.cbegin();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
++it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cbegin();
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
++it;
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
++it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -322,18 +322,18 @@ TEST_CASE("const_iterator class")
{
json j(json::value_t::null);
json::const_iterator it = j.cend();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cend();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it--;
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
it--;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -371,18 +371,18 @@ TEST_CASE("const_iterator class")
{
json j(json::value_t::null);
json::const_iterator it = j.cend();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
}
SECTION("number")
{
json j(17);
json::const_iterator it = j.cend();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
--it;
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
--it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")

36
test/src/unit-class_iterator.cpp
View file

@ -204,20 +204,20 @@ TEST_CASE("iterator class")
{
json j(json::value_t::null);
json::iterator it = j.begin();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it++;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::iterator it = j.begin();
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
it++;
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it++;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -255,20 +255,20 @@ TEST_CASE("iterator class")
{
json j(json::value_t::null);
json::iterator it = j.begin();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
++it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("number")
{
json j(17);
json::iterator it = j.begin();
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
++it;
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
++it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -306,18 +306,18 @@ TEST_CASE("iterator class")
{
json j(json::value_t::null);
json::iterator it = j.end();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
}
SECTION("number")
{
json j(17);
json::iterator it = j.end();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
it--;
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
it--;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")
@ -355,18 +355,18 @@ TEST_CASE("iterator class")
{
json j(json::value_t::null);
json::iterator it = j.end();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
}
SECTION("number")
{
json j(17);
json::iterator it = j.end();
CHECK(it.m_it.primitive_iterator == 1);
CHECK(it.m_it.primitive_iterator.m_it == 1);
--it;
CHECK(it.m_it.primitive_iterator == 0);
CHECK(it.m_it.primitive_iterator.m_it == 0);
--it;
CHECK((it.m_it.primitive_iterator != 0 and it.m_it.primitive_iterator != 1));
CHECK((it.m_it.primitive_iterator.m_it != 0 and it.m_it.primitive_iterator.m_it != 1));
}
SECTION("object")

154
test/src/unit-udt.cpp
View file

@ -37,35 +37,35 @@ namespace udt
{
struct age
{
int val;
int m_val;
};
struct name
{
std::string val;
std::string m_val;
};
struct address
{
std::string val;
std::string m_val;
};
struct person
{
age age;
name name;
age m_age;
name m_name;
};
struct contact
{
person person;
address address;
person m_person;
address m_address;
};
struct contact_book
{
name book_name;
std::vector<contact> contacts;
name m_book_name;
std::vector<contact> m_contacts;
};
}
@ -74,39 +74,105 @@ namespace udt
{
void to_json(nlohmann::json& j, age a)
{
j = a.val;
j = a.m_val;
}
void to_json(nlohmann::json& j, name const& n)
{
j = n.val;
j = n.m_val;
}
void to_json(nlohmann::json& j, person const& p)
{
using nlohmann::json;
j = json{{"age", json{p.age}}, {"name", json{p.name}}};
// this unfortunately does not compile ...
// j["age"] = p.age;
// j["name"] = p.name;
j = json{{"age", json{p.m_age}}, {"name", json{p.m_name}}};
}
void to_json(nlohmann::json& j, address const& a)
{
j = a.val;
j = a.m_val;
}
void to_json(nlohmann::json& j, contact const& c)
{
using nlohmann::json;
j = json{{"person", json{c.person}}, {"address", json{c.address}}};
j = json{{"person", json{c.m_person}}, {"address", json{c.m_address}}};
}
void to_json(nlohmann::json& j, contact_book const& cb)
{
using nlohmann::json;
j = json{{"name", json{cb.book_name}}, {"contacts", cb.contacts}};
j = json{{"name", json{cb.m_book_name}}, {"contacts", cb.m_contacts}};
}
// operators
bool operator==(age lhs, age rhs)
{
return lhs.m_val == rhs.m_val;
}
bool operator==(address const &lhs, address const &rhs)
{
return lhs.m_val == rhs.m_val;
}
bool operator==(name const &lhs, name const &rhs)
{
return lhs.m_val == rhs.m_val;
}
bool operator==(person const &lhs, person const &rhs)
{
return std::tie(lhs.m_name, lhs.m_age) == std::tie(rhs.m_name, rhs.m_age);
}
bool operator==(contact const &lhs, contact const &rhs)
{
return std::tie(lhs.m_person, lhs.m_address) ==
std::tie(rhs.m_person, rhs.m_address);
}
bool operator==(contact_book const &lhs, contact_book const &rhs)
{
return std::tie(lhs.m_book_name, lhs.m_contacts) ==
std::tie(rhs.m_book_name, rhs.m_contacts);
}
}
// from_json methods for default basic_json
namespace udt
{
void from_json(nlohmann::json const& j, age &a)
{
a.m_val = j.get<int>();
}
void from_json(nlohmann::json const& j, name &n)
{
n.m_val = j.get<std::string>();
}
void from_json(nlohmann::json const& j, person &p)
{
p.m_age = j["age"].get<age>();
p.m_name = j["name"].get<name>();
}
void from_json(nlohmann::json const &j, address &a)
{
a.m_val = j.get<std::string>();
}
void from_json(nlohmann::json const& j, contact &c)
{
c.m_person = j["person"].get<person>();
c.m_address = j["address"].get<address>();
}
void from_json(nlohmann::json const&j, contact_book &cb)
{
cb.m_book_name = j["name"].get<name>();
cb.m_contacts = j["contacts"].get<std::vector<contact>>();
}
}
@ -114,17 +180,49 @@ TEST_CASE("basic usage", "[udt]")
{
using nlohmann::json;
// a bit narcissic maybe :) ?
const udt::age a{23};
const udt::name n{"theo"};
const udt::person sfinae_addict{a, n};
const udt::address addr{"Paris"};
const udt::contact cpp_programmer{sfinae_addict, addr};
const udt::contact_book book{{"C++"}, {cpp_programmer, cpp_programmer}};
SECTION("conversion to json via free-functions")
{
udt::age a{23};
CHECK(json{a} == json{23});
// a bit narcissic maybe :) ?
udt::name n{"theo"};
CHECK(json{n} == json{"theo"});
udt::person sfinae_addict{a, n};
CHECK(json{a} == json(23));
CHECK(json{n} == json("theo"));
CHECK(json{sfinae_addict} == R"({"name":"theo", "age":23})"_json);
CHECK(json("Paris") == json{addr});
CHECK(json{cpp_programmer} ==
R"({"person" : {"age":23, "name":"theo"}, "address":"Paris"})"_json);
CHECK(
json{book} ==
R"({"name":"C++", "contacts" : [{"person" : {"age":23, "name":"theo"}, "address":"Paris"}, {"person" : {"age":23, "name":"theo"}, "address":"Paris"}]})"_json);
}
SECTION("conversion from json via free-functions")
{
const auto big_json =
R"({"name":"C++", "contacts" : [{"person" : {"age":23, "name":"theo"}, "address":"Paris"}, {"person" : {"age":23, "name":"theo"}, "address":"Paris"}]})"_json;
const auto parsed_book = big_json.get<udt::contact_book>();
const auto book_name = big_json["name"].get<udt::name>();
const auto contacts = big_json["contacts"].get<std::vector<udt::contact>>();
const auto contact_json = big_json["contacts"].at(0);
const auto contact = contact_json.get<udt::contact>();
const auto person = contact_json["person"].get<udt::person>();
const auto address = contact_json["address"].get<udt::address>();
const auto age = contact_json["person"]["age"].get<udt::age>();
const auto name = contact_json["person"]["name"].get<udt::name>();
CHECK(age == a);
CHECK(name == n);
CHECK(address == addr);
CHECK(person == sfinae_addict);
CHECK(contact == cpp_programmer);
CHECK(contacts == book.m_contacts);
CHECK(book_name == udt::name{"C++"});
CHECK(book == parsed_book);
}
}