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split meta.hpp, add detected_t (used to define concepts)

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Théo DELRIEU
2018-07-24 13:22:44 +02:00
parent 3ac2d81a95
commit f6febbe359
12 changed files with 222 additions and 121 deletions
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96
single_include/nlohmann/json.hpp
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@ -238,41 +238,17 @@ contains a `mapped_type`, whereas `std::vector` fails the test.
std::is_integral<decltype(detect(std::declval<T>()))>::value; \
}
// #include <nlohmann/detail/meta.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
#include <ciso646> // not
#include <cstddef> // size_t
#include <limits> // numeric_limits
#include <type_traits> // conditional, enable_if, false_type, integral_constant, is_constructible, is_integral, is_same, remove_cv, remove_reference, true_type
#include <utility> // declval
// #include <nlohmann/json_fwd.hpp>
// #include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
/*!
@brief detail namespace with internal helper functions
This namespace collects functions that should not be exposed,
implementations of some @ref basic_json methods, and meta-programming helpers.
@since version 2.1.0
*/
namespace detail
{
/////////////
// helpers //
/////////////
template<typename> struct is_basic_json : std::false_type {};
NLOHMANN_BASIC_JSON_TPL_DECLARATION
struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
// alias templates to reduce boilerplate
template<bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
@ -335,6 +311,54 @@ template<class B> struct negation : std::integral_constant<bool, not B::value> {
template<unsigned N> struct priority_tag : priority_tag < N - 1 > {};
template<> struct priority_tag<0> {};
// taken from ranges-v3
template<typename T>
struct static_const
{
static constexpr T value{};
};
template<typename T>
constexpr T static_const<T>::value;
}
}
// #include <nlohmann/detail/meta/type_traits.hpp>
#include <ciso646> // not
#include <limits> // numeric_limits
#include <type_traits> // false_type, is_constructible, is_integral, is_same, true_type
#include <utility> // declval
// #include <nlohmann/json_fwd.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/macro_scope.hpp>
namespace nlohmann
{
/*!
@brief detail namespace with internal helper functions
This namespace collects functions that should not be exposed,
implementations of some @ref basic_json methods, and meta-programming helpers.
@since version 2.1.0
*/
namespace detail
{
/////////////
// helpers //
/////////////
template<typename> struct is_basic_json : std::false_type {};
NLOHMANN_BASIC_JSON_TPL_DECLARATION
struct is_basic_json<NLOHMANN_BASIC_JSON_TPL> : std::true_type {};
////////////////////////
// has_/is_ functions //
////////////////////////
@ -507,16 +531,6 @@ struct is_compatible_type
is_compatible_complete_type<BasicJsonType, CompatibleType>>
{
};
// taken from ranges-v3
template<typename T>
struct static_const
{
static constexpr T value{};
};
template<typename T>
constexpr T static_const<T>::value;
}
}
@ -950,7 +964,9 @@ inline bool operator<(const value_t lhs, const value_t rhs) noexcept
// #include <nlohmann/detail/macro_scope.hpp>
// #include <nlohmann/detail/meta.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/meta/type_traits.hpp>
// #include <nlohmann/detail/value_t.hpp>
@ -1335,7 +1351,9 @@ constexpr const auto& from_json = detail::static_const<detail::from_json_fn>::va
#include <valarray> // valarray
#include <vector> // vector
// #include <nlohmann/detail/meta.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/meta/type_traits.hpp>
// #include <nlohmann/detail/value_t.hpp>
@ -4873,7 +4891,7 @@ template<typename BasicJsonType> struct internal_iterator
// #include <nlohmann/detail/macro_scope.hpp>
// #include <nlohmann/detail/meta.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/value_t.hpp>
@ -9488,7 +9506,7 @@ char* to_chars(char* first, char* last, FloatType value)
// #include <nlohmann/detail/macro_scope.hpp>
// #include <nlohmann/detail/meta.hpp>
// #include <nlohmann/detail/meta/cpp_future.hpp>
// #include <nlohmann/detail/output/output_adapters.hpp>